:root {
  --green-dark: #2d6a4f;
  --green-mid: #40916c;
  --green-light: #74c69d;
  --green-pale: #b7e4c7;
  --green-mist: #d8f3dc;
  --green-snow: #f0faf2;
  --white: #ffffff;
  --text-dark: #1b3a2d;
  --text-mid: #3a5a47;
  --text-soft: #6b8f7a;
  --red: #e63946;
  --red-light: #fde8ea;
  --amber: #f4a261;
  --amber-light: #fef3e2;
  --shadow: 0 4px 20px rgba(45,106,79,0.12);
  --shadow-hover: 0 8px 32px rgba(45,106,79,0.2);
  --radius: 18px;
  --radius-sm: 10px;
  --sidebar-w: 270px;
  --header-h: 56px;
  --tabbar-h: 64px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--green-snow);
  color: var(--text-dark);
  font-family: 'Quicksand', sans-serif;
}

body.app-shell {
  display: flex;
}

button,
input,
select,
textarea {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

h1,
h2,
h3,
h4,
h5,
h6,
.section-title,
.page-header h2,
.hero-copy h2,
.topic-card h3,
.topic-grid-card h3,
.download-card h3,
.card h3 {
  font-family: 'Nunito', sans-serif;
}

#sidebar {
  width: 270px;
  min-height: 100vh;
  background: var(--white);
  border-right: 2px solid var(--green-pale);
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  overflow-y: auto;
  z-index: 100;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

body.sidebar-collapsed #sidebar {
  transform: translateX(-280px);
  opacity: 0;
  pointer-events: none;
}

.sidebar-logo {
  padding: 18px 16px 14px 10px;
  border-bottom: 2px solid var(--green-mist);
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
}

.sidebar-logo-lockup {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  justify-content: space-between;
  padding: 16px 24px 16px 18px;
  flex: 0 1 auto;
  min-width: 0;
  border: 1px solid rgba(45,122,122,0.18);
  border-radius: 26px;
  background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(240,250,242,0.96));
  box-shadow: 0 6px 18px rgba(45,106,79,0.06);
}

.sidebar-logo-lockup svg {
  width: 82px;
  height: 65px;
  flex: 0 0 auto;
  margin-left: -6px;
}

.logo-wordmark {
  font-family: 'Clash Display', 'Quicksand', sans-serif;
  font-weight: 700;
  font-size: 34px;
  color: #1a4a4a;
  letter-spacing: -0.02em;
  line-height: 1;
  white-space: nowrap;
  margin-left: -14px;
}

#sidebar-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #d8f3dc;
  border: 2px solid #b7e4c7;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  overflow: hidden;
  position: relative;
  flex-shrink: 0;
  transition: border-color 0.2s ease;
}

#sidebar-avatar:hover {
  border-color: #40916c;
}

#sidebar-avatar-initials {
  font-family: 'Nunito', sans-serif;
  font-weight: 900;
  font-size: 14px;
  color: #2d6a4f;
  line-height: 1;
  pointer-events: none;
}

.home-top-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 108px;
  gap: 18px;
  align-items: start;
}

.home-top-stack {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.home-profile-dock {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding-top: 6px;
}

.home-profile-avatar-wrap {
  position: relative;
  display: inline-flex;
}

.home-profile-avatar#sidebar-avatar {
  width: 78px;
  height: 78px;
  border-width: 3px;
  background: #dff6e2;
  border-color: #b7e4c7;
  box-shadow: 0 10px 24px rgba(64,145,108,0.12);
}

.home-profile-avatar #sidebar-avatar-initials {
  font-size: 30px;
}

.profile-edit-button {
  position: absolute;
  top: -10px;
  right: -18px;
  z-index: 2;
  min-width: 0;
  height: 28px;
  padding: 0 9px;
  border: 2px solid #ffffff;
  border-radius: 999px;
  background: #40916c;
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  font-family: 'Quicksand', sans-serif;
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 6px 14px rgba(27,58,45,0.18);
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.profile-edit-button:hover {
  background: #2d6a4f;
  border-color: #ffffff;
  color: #ffffff;
  transform: translateY(-1px);
}

#sidebar-rag-bar-wrap {
  padding: 8px 16px 10px;
  border-bottom: 1px solid #e8f5e9;
}

.sidebar-rag-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}

.sidebar-rag-label {
  font-size: 10px;
  font-weight: 700;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

#sidebar-rag-pct {
  font-size: 10px;
  font-weight: 800;
  color: #40916c;
}

.sidebar-rag-track {
  height: 5px;
  background: #e8f5e9;
  border-radius: 3px;
  overflow: hidden;
}

.sidebar-rag-fill {
  height: 100%;
  background: linear-gradient(90deg, #40916c, #74c69d);
  border-radius: 3px;
  transition: width 0.5s ease;
}

.sidebar-rag-sub {
  font-size: 10px;
  color: #aaa;
  margin-top: 3px;
  text-align: right;
}

.sidebar-plant {
  padding: 12px 20px;
  text-align: center;
}

.sidebar-plant svg {
  width: 80px;
  opacity: 0.85;
}

.nav-section-label {
  display: block;
  font-size: 10px;
  font-weight: 800;
  color: #bbb;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 10px 16px 3px;
}

.nav-divider {
  height: 1px;
  background: var(--green-pale);
  margin: 6px 14px;
}

.sidebar-group {
  display: grid;
  gap: 2px;
}

.sidebar-context-card {
  margin: 8px 14px 10px;
  padding: 14px 14px 16px;
  border-radius: 16px;
  background: linear-gradient(180deg, #f3fbf4, #eef8f0);
  border: 1px solid rgba(116,198,157,0.32);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.4);
}

.sidebar-context-card h4 {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 800;
  color: var(--green-dark);
}

.sidebar-context-card p {
  margin: 0;
  font-size: 12px;
  line-height: 1.55;
  color: var(--text-soft);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  margin: 2px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  font-weight: 600;
  font-size: 14px;
  color: var(--text-mid);
  text-decoration: none;
  font-family: 'Quicksand', sans-serif;
}

.nav-item:hover,
.tab-bar button:hover,
.topic-card:hover,
.card:hover,
.rag-toggle button:hover,
.action-button:hover {
  background: var(--green-mist);
}

.nav-item.active,
.nav-item.is-active,
.tab-bar button.is-active {
  background: var(--green-mid);
  color: var(--white);
}

.nav-icon {
  font-size: 16px;
  width: 22px;
  text-align: center;
}

.sidebar-hide-btn {
  margin-top: auto;
  margin-left: 14px;
  margin-right: 14px;
  margin-bottom: 14px;
  border: 1px solid var(--green-pale);
  background: #f8fdf9;
  color: var(--text-mid);
  border-radius: 12px;
  padding: 10px 12px;
  cursor: pointer;
  font-weight: 700;
  transition: all 0.2s ease;
}

.sidebar-hide-btn:hover {
  background: var(--green-mist);
}

#sidebar-restore-tab {
  display: none;
  position: fixed;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  z-index: 500;
  background: #2d6a4f;
  color: white;
  border: none;
  border-radius: 0 8px 8px 0;
  padding: 14px 8px;
  cursor: pointer;
  font-family: 'Nunito', sans-serif;
  font-weight: 900;
  font-size: 10px;
  letter-spacing: 1px;
  writing-mode: vertical-rl;
  text-transform: uppercase;
  box-shadow: 2px 0 12px rgba(45,106,79,0.25);
  transition: background 0.2s;
}

#sidebar-restore-tab:hover {
  background: #40916c;
}

.app-main {
  margin-left: var(--sidebar-w);
  width: calc(100% - var(--sidebar-w));
  padding: 28px 30px 36px;
  transition: margin-left 0.2s ease, width 0.2s ease;
}

.app-shell.sidebar-collapsed .app-main {
  margin-left: 0;
  width: 100%;
}

.mobile-header,
.tab-bar {
  display: none;
}

.page {
  display: none;
}

.page.is-active {
  display: block;
}

.page-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: grid;
  gap: 18px;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.page-header p,
.muted {
  color: var(--text-soft);
}

.page-intro {
  margin: -4px 0 2px;
  font-size: 16px;
  line-height: 1.6;
  color: #8aa596;
}

.breadcrumbs {
  font-size: 14px;
  color: var(--text-soft);
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 12px;
}

.card {
  background: var(--white);
  border-radius: 24px;
  box-shadow: 0 10px 30px rgba(45,106,79,0.08);
  border: 1px solid rgba(116,198,157,0.18);
  padding: 22px 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.card-grid {
  display: grid;
  gap: 18px;
}

.card-grid.cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.shell-section {
  display: grid;
  gap: 14px;
}

.shell-section-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 800;
  color: var(--green-dark);
  padding-bottom: 8px;
  border-bottom: 2px solid rgba(183,228,199,0.55);
}

.hero-banner {
  background:
    radial-gradient(circle at top right, rgba(255,255,255,0.1), transparent 32%),
    linear-gradient(135deg, #5a8f6e, var(--green-mid));
  color: var(--white);
  border-radius: 28px;
  box-shadow: 0 16px 36px rgba(45,106,79,0.14);
}

.shell-notice-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border: 1px solid rgba(244,162,97,0.55);
  border-radius: 18px;
  background: linear-gradient(180deg, #fff8e8, #fffdf6);
  color: #a8742b;
}

.shell-notice-bar p {
  margin: 0;
  line-height: 1.5;
  flex: 1 1 auto;
}

.notice-dismiss {
  border: none;
  background: transparent;
  color: rgba(168,116,43,0.72);
  width: 28px;
  height: 28px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  margin-left: auto;
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease;
}

.notice-dismiss:hover {
  background: rgba(244,162,97,0.12);
  color: #8d6020;
}

.notice-dismiss:focus-visible {
  outline: 2px solid rgba(168,116,43,0.35);
  outline-offset: 2px;
}

.shell-streak-banner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 18px 24px;
}

.shell-streak-main {
  display: flex;
  align-items: center;
  gap: 14px;
}

.shell-streak-main strong,
.shell-streak-best strong {
  display: block;
  font-size: 30px;
  line-height: 1;
  color: #c26d00;
}

.shell-streak-main p,
.shell-streak-best span,
.shell-streak-best strong {
  margin: 0;
}

.shell-streak-icon {
  font-size: 34px;
}

.shell-streak-copy {
  min-width: 0;
}

.shell-streak-copy p {
  margin: 0;
}

.shell-streak-best {
  text-align: right;
}

.shell-home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 32px 38px;
}

.hero-copy {
  display: grid;
  gap: 10px;
}

.hero-countdown {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 2px 0 4px;
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.74);
  font-size: 11px;
  font-weight: 600;
}

.hero-countdown strong {
  font-size: 11px;
  font-weight: 800;
  color: rgba(255,255,255,0.9);
}

.hero-copy p,
.hero-copy h2 {
  margin: 0;
}

.hero-copy h2 {
  font-size: 28px;
  line-height: 1.08;
}

.muted-light {
  color: rgba(255,255,255,0.88);
}

.hero-graphic {
  display: grid;
  gap: 10px;
  justify-items: end;
  font-size: 48px;
  line-height: 1;
}

.hero-graphic span:nth-child(2) {
  margin-right: 28px;
  font-size: 42px;
}

.hero-graphic span:nth-child(3) {
  margin-right: 10px;
  font-size: 60px;
}

.tag-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border-radius: 999px;
  background: #eef8f0;
  border: 1px solid rgba(116,198,157,0.3);
  font-size: 12px;
  font-weight: 700;
  color: var(--green-dark);
}

.live-shell-card {
  display: grid;
  align-content: start;
  gap: 12px;
}

.shell-small-copy {
  min-height: 48px;
  line-height: 1.55;
}

.quiz-launch-button {
  justify-content: center;
  width: 100%;
  min-height: 52px;
  font-size: 17px;
  font-weight: 800;
}

.quiz-grid .live-shell-card {
  grid-template-rows: auto minmax(72px, auto) auto minmax(88px, 1fr) auto;
  gap: 10px;
  padding: 16px;
  min-height: 100%;
}

.quiz-grid .live-shell-card h3,
.quiz-grid .live-shell-card p {
  margin: 0;
}

.quiz-grid .live-shell-card h3 {
  line-height: 1.15;
}

.quiz-grid .live-shell-card .muted:not(.shell-small-copy) {
  font-size: 13px;
}

.quiz-grid .live-shell-card .shell-small-copy {
  min-height: 88px;
  line-height: 1.45;
}

.quiz-grid .quiz-launch-button {
  min-height: 48px;
  font-size: 16px;
}

.flashcard-topic-card {
  grid-template-rows: auto minmax(28px, auto) auto;
  gap: 8px;
  min-height: 100%;
  padding: 18px 20px;
}

.quiz-grid .flashcard-topic-card {
  grid-template-rows: auto minmax(18px, auto) auto;
  gap: 8px;
  padding: 18px 20px;
}

/* ── Quiz best-score badge on grid cards ──────────────────────────────────── */
.quiz-best-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  color: var(--green-mid);
  background: var(--green-mist);
  border-radius: 20px;
  padding: 2px 8px;
  margin-left: 8px;
  vertical-align: middle;
}

/* ── Quiz session card ────────────────────────────────────────────────────── */
.quiz-session-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px 32px 32px;
  max-width: 680px;
  margin: 0 auto;
  box-shadow: var(--shadow);
}

.quiz-session-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.quiz-topic-breadcrumb {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.quiz-q-count {
  font-size: 12px;
  font-weight: 700;
  color: var(--green-dark);
  background: var(--green-snow);
  border: 1px solid var(--green-pale);
  padding: 3px 10px;
  border-radius: 20px;
}

.quiz-progress-bar {
  height: 6px;
  background: var(--green-mist);
  border-radius: 3px;
  margin-bottom: 22px;
  overflow: hidden;
}

.quiz-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--green-mid), var(--green-light));
  border-radius: 3px;
  transition: width 0.35s ease;
}

.quiz-question-text {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--text-dark);
  margin: 0 0 22px;
}

/* ── Answer options ───────────────────────────────────────────────────────── */
.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 18px;
}

.quiz-option-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 13px 16px;
  background: var(--green-snow);
  border: 2px solid var(--green-pale);
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: left;
  font-weight: 600;
  color: var(--text-dark);
  transition: background 0.14s, border-color 0.14s, transform 0.1s;
}

.quiz-option-btn:hover:not(:disabled) {
  background: var(--green-mist);
  border-color: var(--green-mid);
  transform: translateX(4px);
}

.quiz-opt-label {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  border: 2px solid var(--green-pale);
  border-radius: 50%;
  font-size: 12px;
  font-weight: 800;
  color: var(--green-mid);
}

.quiz-opt-text {
  flex: 1;
  font-size: 14px;
  line-height: 1.45;
}

.quiz-option-btn:disabled {
  cursor: default;
}

.quiz-option-btn.is-correct {
  background: #dcfce7;
  border-color: #16a34a;
  color: #14532d;
}

.quiz-option-btn.is-correct .quiz-opt-label {
  background: #16a34a;
  border-color: #16a34a;
  color: var(--white);
}

.quiz-option-btn.is-wrong {
  background: var(--red-light);
  border-color: var(--red);
  color: #7f1d1d;
}

.quiz-option-btn.is-wrong .quiz-opt-label {
  background: var(--red);
  border-color: var(--red);
  color: var(--white);
}

.quiz-option-btn.is-muted {
  opacity: 0.4;
}

/* ── Feedback area ────────────────────────────────────────────────────────── */
.quiz-feedback-area {
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 4px;
  min-height: 0;
}

.quiz-feedback-area.is-correct {
  background: #dcfce7;
  border: 1px solid #86efac;
}

.quiz-feedback-area.is-wrong {
  background: var(--red-light);
  border: 1px solid #fca5a5;
}

.quiz-fb-icon {
  flex-shrink: 0;
  font-size: 17px;
  font-weight: 900;
  line-height: 1;
  margin-top: 3px;
}

.quiz-feedback-area.is-correct .quiz-fb-icon { color: #16a34a; }
.quiz-feedback-area.is-wrong   .quiz-fb-icon { color: var(--red); }

.quiz-fb-body {
  flex: 1;
  font-size: 14px;
  line-height: 1.5;
}

.quiz-fb-body strong {
  display: block;
  margin-bottom: 2px;
}

.quiz-fb-body p {
  margin: 0;
  color: var(--text-mid);
}

.quiz-next-btn {
  flex-shrink: 0;
  align-self: center;
  padding: 8px 16px;
  background: var(--green-dark);
  color: var(--white);
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.14s;
}

.quiz-next-btn:hover {
  background: var(--green-mid);
}

/* ── Results card ─────────────────────────────────────────────────────────── */
.quiz-results-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 40px 32px;
  max-width: 460px;
  margin: 0 auto;
  text-align: center;
  box-shadow: var(--shadow);
}

.quiz-results-ring {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: conic-gradient(var(--green-mid) calc(var(--pct, 0) * 1%), var(--green-mist) 0);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  position: relative;
}

.quiz-results-ring::after {
  content: '';
  position: absolute;
  inset: 16px;
  background: var(--white);
  border-radius: 50%;
}

.quiz-results-ring span {
  position: relative;
  z-index: 1;
  font-size: 22px;
  font-weight: 900;
  color: var(--text-dark);
}

.quiz-results-msg {
  font-size: 20px;
  margin: 0 0 8px;
}

.quiz-results-score {
  font-size: 15px;
  color: var(--text-soft);
  margin: 0 0 28px;
}

.quiz-results-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 600px) {
  .quiz-session-card,
  .quiz-results-card {
    padding: 20px 16px 24px;
  }
  .quiz-feedback-area {
    flex-wrap: wrap;
  }
  .quiz-next-btn {
    width: 100%;
    text-align: center;
  }
}

.flashcard-topic-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  align-items: start;
}

.flashcard-topic-head .icon {
  font-size: 24px;
  line-height: 1;
}

.flashcard-topic-head h3 {
  margin: 0;
  min-height: 56px;
  line-height: 1.15;
}

.flashcard-topic-card .muted {
  margin: 0;
  min-height: 18px;
  font-size: 14px;
}

.flashcard-topic-button {
  justify-content: center;
  width: 100%;
  min-height: 38px;
  padding: 10px 16px;
}

.topic-card-progress {
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: #e4f4e7;
  overflow: hidden;
}

.topic-card-progress-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #5e9a74, #8bc7a3);
}

.progress-track {
  width: 100%;
  height: 12px;
  background: var(--green-mist);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--green-mid), var(--green-light));
  border-radius: 999px;
}

.hero-actions,
.action-row,
.filter-row,
.rag-toggle,
.settings-actions,
.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

#page-topic .rag-toggle {
  gap: 0;
  width: fit-content;
  border: 1px solid rgba(116,198,157,0.24);
  border-radius: 16px;
  overflow: hidden;
  background: #f7fcf8;
}

#page-topic .rag-toggle button {
  min-width: 120px;
  justify-content: center;
  border-radius: 0;
  border-right: 1px solid rgba(116,198,157,0.2);
  background: transparent;
  padding: 12px 20px;
}

#page-topic .rag-toggle button:last-child {
  border-right: none;
}

#page-topic .rag-toggle button:hover {
  background: #edf8ef;
  transform: none;
}

#page-topic .action-row.topic-action-row {
  gap: 0;
  width: fit-content;
}

#page-topic .topic-action-button {
  min-width: 220px;
  justify-content: center;
  border-radius: 0;
  padding: 12px 22px;
}

#page-topic .topic-action-button:first-child {
  border-radius: 16px 0 0 16px;
}

#page-topic .topic-action-button:last-child {
  border-radius: 0 16px 16px 0;
}

.action-button,
.rag-toggle button,
.download-button {
  border: none;
  border-radius: 25px;
  background: var(--green-mist);
  color: var(--green-dark);
  padding: 10px 22px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: 'Quicksand', sans-serif;
  font-weight: 700;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  box-shadow: none;
}

.action-button.is-primary,
.download-button {
  background: var(--green-mid);
  color: var(--white);
}

.action-button.is-primary:hover,
.download-button:hover {
  background: var(--green-dark);
  box-shadow: 0 4px 12px rgba(64,145,108,0.4);
}

.shell-home-hero #continue-button.action-button.is-primary {
  background: #ffffff;
  color: #1f4d38;
  border: 1px solid rgba(31,77,56,0.16);
  box-shadow: 0 6px 18px rgba(27,58,45,0.14);
  padding: 10px 18px;
  min-width: 0;
}

.shell-home-hero #continue-button.action-button.is-primary:hover {
  background: #f6fff8;
  color: #1f4d38;
  box-shadow: 0 8px 22px rgba(27,58,45,0.18);
}

.action-button:not(.is-primary):hover {
  background: var(--green-pale);
}

.action-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.topic-card,
.topic-grid-card,
.download-card,
.audio-card,
.quiz-card,
.glossary-term,
.practice-card {
  background: var(--white);
  border: 1px solid rgba(116,198,157,0.18);
  border-radius: 18px;
  box-shadow: 0 6px 18px rgba(45,106,79,0.06);
  padding: 14px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.topic-grid,
.download-grid,
.audio-grid,
.quiz-grid,
.practice-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.download-task-group {
  display: grid;
  gap: 14px;
}

.download-task-group + .download-task-group {
  margin-top: 20px;
}

.download-provider-group {
  display: grid;
  gap: 14px;
}

.download-provider-group + .download-provider-group {
  margin-top: 22px;
}

.download-provider-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  padding: 0 2px 10px;
  border-bottom: 1px solid rgba(116,198,157,0.2);
}

.download-provider-head h3 {
  margin: 0 0 4px;
  font-size: 20px;
}

.download-provider-head p {
  margin: 0;
}

.download-provider-count {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  padding: 5px 10px;
  border-radius: 10px;
  background: #f6fbf7;
  border: 1px solid rgba(116,198,157,0.2);
  color: var(--text-soft);
  font-size: 11px;
  font-weight: 700;
}

.tag-chip.is-problem-solving {
  background: #eef6d9;
  border-color: rgba(176,205,91,0.28);
  color: #557436;
}

.tag-chip.is-digital-support {
  background: #f4ecff;
  border-color: rgba(156,122,218,0.2);
  color: #7755ab;
}

.tag-chip.is-data {
  background: #eef6ff;
  border-color: rgba(96,143,222,0.22);
  color: #4f6e9b;
}

.tag-chip.is-legislation {
  background: #fff4d7;
  border-color: rgba(231,185,78,0.2);
  color: #9c7424;
}

.tag-chip.is-business {
  background: #eef3ff;
  border-color: rgba(127,154,218,0.18);
  color: #6277a0;
}

.tag-chip.is-emerging-tech {
  background: #fff0f6;
  border-color: rgba(231,134,172,0.2);
  color: #a24f73;
}

.tag-chip.is-digital-env {
  background: #ecf7ff;
  border-color: rgba(112,176,223,0.2);
  color: #47799b;
}

.tag-chip.is-cybersecurity {
  background: #ffeef5;
  border-color: rgba(226,93,141,0.2);
  color: #b14d75;
}

.download-library-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.download-library-card {
  display: grid;
  gap: 10px;
  align-content: start;
  min-height: 100%;
  padding: 16px;
  border-radius: 18px;
  box-shadow: 0 6px 18px rgba(45,106,79,0.05);
}

.download-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.download-task-chip,
.download-type-chip {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 4px 8px;
  border-radius: 8px;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.download-task-chip {
  background: #f2f8f3;
  border: 1px solid rgba(116,198,157,0.18);
  color: var(--green-dark);
}

.download-type-chip {
  background: #fcf7ef;
  border: 1px solid rgba(244,162,97,0.18);
  color: #a8742b;
}

.download-library-card h4 {
  margin: 0;
  font-size: 17px;
  line-height: 1.2;
}

.download-library-card p {
  margin: 0;
  min-height: 42px;
  line-height: 1.5;
  font-size: 13px;
}

.download-library-card .download-button {
  justify-content: center;
  width: 100%;
  margin-top: 2px;
  min-height: 40px;
  padding: 9px 16px;
  border-radius: 12px;
  font-size: 13px;
}

.file-browser-section {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.file-browser-section + .file-browser-section {
  margin-top: 24px;
}

.file-browser-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  padding: 0 2px 10px;
  border-bottom: 1px solid rgba(116,198,157,0.22);
}

.file-browser-head h3 {
  margin: 0 0 4px;
  color: var(--green-dark);
}

.file-browser-head p {
  margin: 0;
}

.file-list,
.file-browser-stack {
  display: grid;
  gap: 8px;
}

.file-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid rgba(116,198,157,0.16);
  border-radius: 12px;
  background: var(--white);
  box-shadow: 0 4px 14px rgba(45,106,79,0.04);
}

.file-row-main {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.file-row-main strong {
  display: block;
  color: var(--green-dark);
  font-size: 14px;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.file-row-main span:not(.file-icon) {
  display: block;
  margin-top: 2px;
  color: var(--text-soft);
  font-size: 12px;
  font-weight: 700;
}

.file-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: #f4faf7;
  color: var(--green-dark);
  flex-shrink: 0;
}

.file-kind {
  padding: 4px 8px;
  border-radius: 999px;
  background: #fcf7ef;
  border: 1px solid rgba(244,162,97,0.18);
  color: #9c6c25;
  font-size: 11px;
  font-weight: 800;
}

.file-row-actions {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.file-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 30px;
  padding: 6px 10px;
  border-radius: 9px;
  background: #f6fbf7;
  border: 1px solid rgba(116,198,157,0.22);
  color: var(--green-dark);
  font-size: 12px;
  font-weight: 800;
  text-decoration: none;
}

.file-action:hover {
  background: var(--green-pale);
}

.esp-task-guide {
  display: grid;
  gap: 16px;
}

.esp-task-summary-card {
  display: grid;
  gap: 10px;
}

.esp-task-summary-card h3 {
  margin: 0;
  color: var(--green-dark);
}

.esp-guide-block {
  padding: 18px 20px;
  border-radius: 18px;
  background: var(--white);
  border: 1px solid rgba(116,198,157,0.18);
  box-shadow: 0 6px 18px rgba(45,106,79,0.05);
}

.esp-guide-block h3 {
  margin: 0 0 10px;
  color: var(--green-dark);
}

.esp-guide-block ul {
  margin: 0;
  padding-left: 18px;
  color: var(--text-mid);
}

.esp-guide-block li {
  margin: 6px 0;
  line-height: 1.5;
}

.esp-pattern-block {
  background: #f6fbf7;
}

.download-card strong {
  display: block;
  line-height: 1.4;
  margin-bottom: 8px;
  word-break: break-word;
}

.glossary-shell-card {
  gap: 18px;
  border-radius: 24px;
  background: linear-gradient(180deg, #f8fdf9, #f2fbf4);
  border: 1px solid rgba(116,198,157,0.28);
}

.glossary-search-field {
  margin-bottom: 0;
}

.glossary-alpha {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.glossary-alpha-chip {
  min-width: 40px;
  padding: 8px 11px;
  border-radius: 12px;
  border: 1px solid rgba(116,198,157,0.35);
  background: #f8fdf9;
  color: var(--text-soft);
  font-weight: 700;
}

.glossary-alpha-chip.is-active {
  background: var(--green-dark);
  color: #fff;
}

.glossary-shell-item {
  display: grid;
  grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px 20px;
  border-radius: 18px;
  border: 1px solid rgba(116,198,157,0.24);
  border-left: 4px solid rgba(116,198,157,0.48);
  background: linear-gradient(180deg, #ffffff, #fbfefc);
  box-shadow: 0 8px 22px rgba(45,106,79,0.05);
}

.glossary-term-head {
  display: flex;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 10px;
}

.glossary-letter-group {
  display: grid;
  gap: 14px;
  padding: 18px 18px 16px;
  border-radius: 22px;
  border: 1px solid rgba(116,198,157,0.2);
  background: rgba(255,255,255,0.78);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.5);
}

.glossary-letter-heading {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 800;
  color: var(--green-dark);
}

.glossary-letter-heading::after {
  content: "";
  width: 40px;
  height: 3px;
  border-radius: 999px;
  background: rgba(45,106,79,0.9);
}

.glossary-letter-stack {
  display: grid;
  gap: 12px;
}

.flashcard-browser {
  display: grid;
}

.flashcard-browser-card {
  display: grid;
  gap: 16px;
  padding: 20px 22px;
}

.flashcard-browser-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(116,198,157,0.2);
}

.flashcard-browser-head h3,
.flashcard-browser-head p {
  margin: 0;
}

.flashcard-browser-badge {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(116,198,157,0.18);
  background: #f6fbf7;
  color: var(--text-soft);
  font-size: 12px;
  font-weight: 700;
}

.flashcard-browser-list {
  display: grid;
  gap: 10px;
}

.flashcard-browser-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 14px 16px;
  border: 1px solid rgba(116,198,157,0.18);
  border-radius: 16px;
  background: linear-gradient(180deg, #ffffff, #fbfefc);
}

.flashcard-browser-copy {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.flashcard-browser-title {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: var(--green-dark);
}

.flashcard-browser-title strong {
  font-size: 16px;
  line-height: 1.25;
}

.flashcard-browser-icon {
  font-size: 20px;
  line-height: 1;
}

.flashcard-browser-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
}

.flashcard-browser-stat {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 4px 10px;
  border-radius: 999px;
  background: #f3faf4;
  border: 1px solid rgba(116,198,157,0.18);
  color: var(--text-soft);
  font-size: 12px;
  font-weight: 700;
}

.flashcard-browser-open {
  min-width: 132px;
  justify-content: center;
}

.topic-card .icon,
.topic-grid-card .icon {
  font-size: 28px;
}

.topic-dashboard-card {
  display: grid;
  align-content: start;
  grid-template-rows: auto auto minmax(116px, 1fr) auto auto;
  gap: 10px;
  text-align: left;
  border: none;
  cursor: pointer;
  min-height: 100%;
}

.topic-dashboard-card strong,
.topic-dashboard-card p {
  margin: 0;
}

.topic-dashboard-card strong {
  min-height: 60px;
  align-self: start;
  font-size: 16px;
  line-height: 1.15;
}

.topic-dashboard-card p.muted {
  min-height: 116px;
  align-self: start;
  font-size: 13px;
  line-height: 1.5;
}

.topic-dashboard-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.topic-dashboard-area {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 4px 8px;
  border-radius: 8px;
  background: #f2f8f3;
  border: 1px solid rgba(116,198,157,0.18);
  color: var(--green-dark);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.topic-dashboard-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 11px;
  color: var(--text-soft);
}

.completion-summary {
  display: grid;
  gap: 8px;
}

.qotd-live-card {
  display: grid;
  gap: 18px;
}

.qotd-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.qotd-option-list {
  display: grid;
  gap: 14px;
}

.qotd-option-button {
  width: 100%;
  text-align: left;
  border-radius: 8px;
  border: 2px solid var(--green-pale);
  background: #ffffff;
  color: var(--text-dark);
  padding: 10px 14px;
  font-size: 13px;
  font-family: 'Quicksand', sans-serif;
  font-weight: 600;
  cursor: pointer;
}

.qotd-option-button:hover:not(:disabled) {
  border-color: var(--green-mid);
  background: var(--green-snow);
}

/* QOTD answered states */
.qotd-opt-correct {
  border-color: var(--green-mid) !important;
  background: var(--green-mist) !important;
  color: var(--green-dark) !important;
  font-weight: 800;
  cursor: default;
}

.qotd-opt-disabled {
  border-color: var(--green-pale);
  background: #fafafa;
  color: #b0b0b0;
  cursor: default;
  opacity: 0.7;
}

.qotd-option-button:disabled {
  cursor: default;
}

/* QOTD feedback box */
.qotd-feedback {
  font-size: 13px;
  line-height: 1.6;
  min-height: 0;
}

.qotd-feedback-correct {
  background: var(--green-mist);
  border-left: 3px solid var(--green-mid);
  border-radius: 6px;
  padding: 10px 14px;
  color: var(--green-dark);
  font-weight: 600;
}

.qotd-feedback-wrong {
  background: var(--red-light);
  border-left: 3px solid var(--red);
  border-radius: 6px;
  padding: 10px 14px;
  color: #7a1922;
  font-weight: 600;
}

/* QOTD completed badge */
.qotd-done-badge {
  display: inline-block;
  margin-left: 10px;
  background: var(--green-mist);
  color: var(--green-dark);
  font-size: 11px;
  font-weight: 700;
  border-radius: 20px;
  padding: 2px 10px;
  vertical-align: middle;
}

/* QOTD question text */
.qotd-question-text {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.5;
  margin: 0;
}

.content-placeholder,
.empty-state {
  background: linear-gradient(180deg, #f6fcf7, #f0faf2);
  border: 1px dashed var(--green-light);
  border-radius: 18px;
  color: var(--text-mid);
  padding: 18px;
}

.topic-learning-shell {
  display: grid;
  gap: 18px;
}

.topic-learning-hero,
.topic-checklist-card,
.topic-navigation-panel {
  padding: 22px 24px;
}

.topic-learning-hero {
  display: grid;
  gap: 12px;
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(243,251,244,0.96));
}

.topic-learning-eyebrow,
.topic-diagram-eyebrow,
.topic-highlight-eyebrow {
  margin: 0;
  color: var(--green-mid);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.topic-learning-hero h3,
.topic-diagram-placeholder h3,
.topic-learning-section h3,
.topic-highlight-card h3,
.topic-checklist-card h3,
.topic-navigation-panel h3 {
  margin: 0;
}

.topic-learning-hero p,
.topic-diagram-placeholder p,
.topic-learning-section p,
.topic-highlight-card p,
.topic-checklist-card p,
.topic-navigation-panel p {
  margin: 0;
}

.topic-section-map {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.topic-section-chip {
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--green-snow);
  border: 1px solid rgba(116,198,157,0.24);
  color: var(--green-dark);
  font-size: 12px;
  font-weight: 700;
}

.topic-highlight-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.topic-highlight-card {
  display: grid;
  gap: 10px;
  padding: 18px 20px;
}

.topic-learning-stack {
  display: grid;
  gap: 16px;
}

.topic-learning-section {
  display: grid;
  gap: 14px;
  padding: 20px 22px;
}

.topic-learning-section-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.topic-section-code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 62px;
  padding: 6px 10px;
  border-radius: 999px;
  background: #edf8ef;
  color: var(--green-dark);
  font-size: 12px;
  font-weight: 800;
}

.topic-learning-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
  color: var(--text-mid);
}

.topic-diagram-placeholder {
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1.25fr) minmax(220px, 0.75fr);
  align-items: center;
  padding: 20px 22px;
  background: linear-gradient(135deg, rgba(238,249,240,0.96), rgba(246,252,247,0.98));
}

.topic-diagram-copy {
  display: grid;
  gap: 10px;
}

.topic-diagram-frame {
  min-height: 190px;
  display: grid;
  place-items: center;
  gap: 10px;
  text-align: center;
  border-radius: 22px;
  border: 1px dashed rgba(45,106,79,0.28);
  background: rgba(255,255,255,0.84);
  color: var(--text-soft);
  padding: 18px;
}

.topic-diagram-icon {
  font-size: 34px;
  line-height: 1;
}

.topic-navigation-panel {
  display: grid;
  gap: 14px;
}

.topic-navigation-copy {
  display: grid;
  gap: 8px;
}

.topic-navigation-row {
  gap: 10px;
}

.topic-navigation-button {
  justify-content: center;
}

.topic-document-shell {
  display: grid;
  gap: 30px;
  padding: 34px 38px 40px;
  border-radius: 28px;
  border: 1px solid rgba(116, 198, 157, 0.2);
  background: linear-gradient(180deg, rgba(255,255,255,0.99), rgba(249,253,250,0.98));
  box-shadow: 0 18px 44px rgba(35, 76, 57, 0.08);
}

.topic-document-intro {
  display: grid;
  gap: 14px;
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(116, 198, 157, 0.22);
}

.topic-document-kicker {
  margin: 0;
  color: var(--green-mid);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.topic-document-breadcrumb {
  margin: 0;
  color: var(--text-soft);
  font-size: 13px;
  line-height: 1.6;
}

.topic-document-breadcrumb span {
  color: var(--green-light);
  padding: 0 6px;
}

.topic-document-title {
  margin: 0;
  color: var(--green-dark);
  font-size: clamp(30px, 3vw, 42px);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.topic-document-subtitle {
  margin: 0;
  color: var(--green-mid);
  font-size: 14px;
  font-weight: 700;
}

.topic-document-lead {
  margin: 0;
  max-width: 72ch;
  color: var(--text-mid);
  font-size: 18px;
  line-height: 1.78;
}

.topic-document-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.topic-document-chip,
.topic-document-chip-link,
.topic-doc-source-more {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid rgba(116, 198, 157, 0.24);
  background: var(--green-snow);
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
}

.topic-document-chip {
  padding: 8px 14px;
}

.topic-document-chip-link,
.topic-doc-source-more {
  padding: 8px 14px;
  cursor: pointer;
  font-family: inherit;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.topic-document-chip-link:hover,
.topic-document-chip-link:focus-visible,
.topic-doc-source-more:hover,
.topic-doc-source-more:focus-visible {
  transform: translateY(-1px);
  background: #eaf7ed;
  border-color: rgba(45, 106, 79, 0.26);
  color: var(--green-dark);
  outline: none;
}

.topic-document-diagram {
  display: grid;
  gap: 22px;
  grid-template-columns: minmax(0, 1.2fr) minmax(240px, 0.8fr);
  align-items: stretch;
  padding: 24px 26px;
  border-radius: 24px;
  border: 1px solid rgba(116, 198, 157, 0.2);
  background: linear-gradient(135deg, rgba(241, 250, 243, 0.96), rgba(249, 253, 250, 0.98));
}

.topic-document-diagram-copy {
  display: grid;
  gap: 12px;
}

.topic-document-diagram-copy h3,
.topic-document-reference-title h2 {
  margin: 0;
}

.topic-document-diagram-copy p {
  margin: 0;
  color: var(--text-mid);
  line-height: 1.72;
}

.topic-document-diagram-frame {
  min-height: 220px;
  display: grid;
  place-items: center;
  gap: 12px;
  padding: 22px;
  text-align: center;
  border-radius: 22px;
  border: 1px dashed rgba(45, 106, 79, 0.24);
  background: rgba(255,255,255,0.9);
  color: var(--text-soft);
}

.topic-document-diagram-frame p {
  margin: 0;
}

.topic-document-diagram-icon {
  font-size: 34px;
  line-height: 1;
}

.topic-document-body {
  display: grid;
  gap: 28px;
}

.topic-document-section {
  display: grid;
  gap: 18px;
  padding-top: 28px;
  border-top: 1px solid rgba(116, 198, 157, 0.18);
}

.topic-document-body .topic-document-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.topic-document-section-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.topic-document-section-title {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.topic-document-section-title h2 {
  margin: 0;
  color: var(--green-dark);
  font-size: 28px;
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.topic-document-section-body {
  display: grid;
  gap: 16px;
}

.topic-document-section-body h3,
.topic-document-section-body h4 {
  margin: 10px 0 0;
  color: var(--green-dark);
}

.topic-document-section-body h3 {
  font-size: 21px;
  line-height: 1.3;
}

.topic-document-section-body h4 {
  font-size: 17px;
  line-height: 1.35;
}

.topic-document-section-body p {
  margin: 0;
  color: var(--text-mid);
  line-height: 1.8;
}

.topic-document-section-body strong {
  color: var(--green-dark);
}

.topic-document-section-body code {
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(45, 106, 79, 0.08);
  color: var(--green-dark);
  font-family: Consolas, Monaco, monospace;
  font-size: 0.92em;
}

.topic-document-list {
  margin: 0;
  padding-left: 22px;
  display: grid;
  gap: 10px;
  color: var(--text-mid);
}

.topic-document-list-numbered {
  padding-left: 24px;
}

.topic-document-list li {
  line-height: 1.74;
}

.topic-document-table-wrap {
  overflow-x: auto;
  border-radius: 20px;
  border: 1px solid rgba(116, 198, 157, 0.2);
  background: #fff;
}

.topic-document-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
}

.topic-document-table th,
.topic-document-table td {
  padding: 14px 16px;
  border-bottom: 1px solid rgba(116, 198, 157, 0.16);
  text-align: left;
  vertical-align: top;
}

.topic-document-table th {
  background: rgba(241, 250, 243, 0.92);
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.topic-document-table td {
  color: var(--text-mid);
  line-height: 1.72;
}

.topic-document-table tbody tr:last-child td {
  border-bottom: 0;
}

.topic-doc-source-strip {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.topic-doc-source-label {
  color: var(--text-soft);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.topic-doc-source-icon {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid rgba(116, 198, 157, 0.22);
  background: var(--green-snow);
  color: var(--green-dark);
  text-decoration: none;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.topic-doc-source-icon:hover,
.topic-doc-source-icon:focus-visible {
  transform: translateY(-1px);
  background: #eaf7ed;
  border-color: rgba(45, 106, 79, 0.26);
  outline: none;
}

.topic-document-references {
  display: grid;
  gap: 20px;
  padding-top: 30px;
  border-top: 1px solid rgba(116, 198, 157, 0.2);
}

.topic-document-reference-lead {
  margin: 0;
  color: var(--text-mid);
  line-height: 1.76;
}

.topic-reference-groups {
  display: grid;
  gap: 22px;
}

.topic-reference-group {
  display: grid;
  gap: 16px;
  padding: 22px 24px;
  border-radius: 24px;
  border: 1px solid rgba(116, 198, 157, 0.18);
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(246,252,247,0.95));
}

.topic-reference-group-head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.topic-reference-group-head h3 {
  margin: 0;
}

.topic-reference-list {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 12px;
}

.topic-reference-item {
  display: grid;
  gap: 4px;
}

.topic-reference-link {
  color: var(--green-dark);
  font-weight: 700;
  text-decoration: none;
}

.topic-reference-link:hover,
.topic-reference-link:focus-visible {
  text-decoration: underline;
  outline: none;
}

.topic-reference-host,
.topic-reference-spec,
.topic-reference-note {
  color: var(--text-soft);
  font-size: 13px;
  line-height: 1.6;
}

.topic-navigation-panel {
  display: grid;
  gap: 18px;
  padding: 24px 26px;
  border: 1px solid rgba(116, 198, 157, 0.2);
  background: linear-gradient(180deg, rgba(248,252,249,0.98), rgba(241,250,243,0.92));
}

.topic-navigation-summary {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.topic-navigation-block {
  display: grid;
  gap: 4px;
  padding: 16px 18px;
  border-radius: 18px;
  border: 1px solid rgba(116, 198, 157, 0.18);
  background: rgba(255,255,255,0.78);
}

.topic-navigation-label {
  color: var(--text-soft);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.topic-navigation-value {
  color: var(--green-dark);
  font-size: 18px;
  line-height: 1.3;
}

.topic-navigation-note {
  color: var(--text-mid);
  font-size: 14px;
  line-height: 1.55;
}

.rag-toggle button[data-value="red"].is-active {
  background: var(--red);
  color: var(--white);
  box-shadow: 0 10px 20px rgba(225,79,106,0.2);
}

.rag-toggle button[data-value="amber"].is-active {
  background: var(--amber);
  color: var(--white);
  box-shadow: 0 10px 20px rgba(209,138,12,0.18);
}

.rag-toggle button[data-value="green"].is-active {
  background: var(--green-mid);
  color: var(--white);
  box-shadow: 0 10px 20px rgba(60,154,105,0.18);
}

.rag-toggle button[data-value="red"],
.progress-rag-toggle button[data-value="red"] {
  background: linear-gradient(180deg, #fff4f6 0%, #ffe8ed 100%);
  color: #bf3e5c;
  border: 1px solid rgba(225,79,106,0.22);
}

.rag-toggle button[data-value="amber"],
.progress-rag-toggle button[data-value="amber"] {
  background: linear-gradient(180deg, #fffaf0 0%, #ffefce 100%);
  color: #ad6f08;
  border: 1px solid rgba(209,138,12,0.22);
}

.rag-toggle button[data-value="green"],
.progress-rag-toggle button[data-value="green"] {
  background: linear-gradient(180deg, #f4fbf5 0%, #e2f5e7 100%);
  color: #2f7b59;
  border: 1px solid rgba(60,154,105,0.22);
}

.rag-toggle button[data-value],
.progress-rag-toggle button[data-value] {
  gap: 10px;
  letter-spacing: 0.01em;
  font-weight: 800;
  box-shadow: 0 4px 10px rgba(45,106,79,0.05);
}

.rag-toggle button[data-value]::before,
.progress-rag-toggle button[data-value]::before {
  content: "\25CF";
  font-size: 11px;
  line-height: 1;
}

.rag-toggle button[data-value="red"]::before,
.progress-rag-toggle button[data-value="red"]::before {
  color: #e14f6a;
}

.rag-toggle button[data-value="amber"]::before,
.progress-rag-toggle button[data-value="amber"]::before {
  color: #d18a0c;
}

.rag-toggle button[data-value="green"]::before,
.progress-rag-toggle button[data-value="green"]::before {
  color: #3c9a69;
}

.rag-toggle button[data-value="red"].is-active::before,
.progress-rag-toggle button[data-value="red"].is-active::before,
.rag-toggle button[data-value="amber"].is-active::before,
.progress-rag-toggle button[data-value="amber"].is-active::before,
.rag-toggle button[data-value="green"].is-active::before,
.progress-rag-toggle button[data-value="green"].is-active::before {
  color: currentColor;
}

.stat-row {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.stat-card strong {
  display: block;
  font-size: 28px;
}

.leaderboard-list,
.live-users-list {
  display: grid;
  gap: 12px;
}

.leaderboard-item,
.live-users-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

/* ── Live Users: count bar + avatar rows ──────────────────────────────────── */
.lu-count-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0 10px;
  border-bottom: 1px solid rgba(116,198,157,0.2);
  margin-bottom: 4px;
}

.lu-count-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-mid, #555);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.lu-count-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 26px;
  height: 26px;
  padding: 0 8px;
  border-radius: 13px;
  background: var(--green-mid, #52b788);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 700;
}

.lu-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
}

.lu-avatar {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  font-weight: 700;
}

.lu-avatar-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.lu-avatar-initials {
  background: var(--green-dark, #1b4332);
  color: #fff;
  user-select: none;
}

.lu-info {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 0;
}

.lu-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-dark, #1a2e1a);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lu-status {
  font-size: 0.74rem;
  color: var(--green-mid, #52b788);
  font-weight: 500;
}

.lu-pts {
  font-size: 0.78rem;
  color: var(--text-mid, #555);
  white-space: nowrap;
}

.lu-empty {
  font-size: 0.85rem;
  color: var(--text-mid, #777);
  margin: 6px 0 0;
  padding: 0;
}

.glossary-list {
  display: grid;
  gap: 18px;
}

.glossary-term {
  display: grid;
  gap: 10px;
  padding: 16px 18px;
  border-radius: 18px;
  border: 1px solid rgba(116,198,157,0.28);
  background: #ffffff;
  box-shadow: 0 8px 22px rgba(45,106,79,0.04);
  transition: border-color 120ms ease, box-shadow 120ms ease, transform 120ms ease;
}

.glossary-term:hover {
  border-color: rgba(116,198,157,0.42);
  box-shadow: 0 12px 26px rgba(45,106,79,0.07);
  transform: translateY(-1px);
}

.progress-shell-card {
  display: grid;
  gap: 18px;
}

.progress-tab-row {
  display: inline-flex;
  align-items: center;
  gap: 0;
  padding: 4px;
  border-radius: 14px;
  background: #dff4e0;
  width: fit-content;
}

.progress-tab-chip {
  border: 0;
  background: transparent;
  color: var(--text-soft);
  padding: 10px 18px;
  border-radius: 11px;
  font-weight: 800;
  font-family: 'Quicksand', sans-serif;
  cursor: pointer;
}

.progress-tab-chip.is-active {
  background: #fff;
  color: var(--green-dark);
  box-shadow: 0 4px 14px rgba(45,106,79,0.08);
}

.progress-page-intro {
  margin: 0;
}

.progress-rag-legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid rgba(116,198,157,0.22);
}

.progress-legend-chip,
.progress-status-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 84px;
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
}

.progress-legend-chip.is-red,
.progress-status-pill.is-red {
  background: #ffe7ee;
  color: #e14f6a;
}

.progress-legend-chip.is-amber,
.progress-status-pill.is-amber {
  background: #fff3dc;
  color: #d18a0c;
}

.progress-legend-chip.is-green,
.progress-status-pill.is-green {
  background: #e5f7e8;
  color: #3c9a69;
}

.progress-status-pill {
  min-width: 120px;
  background: #eef2f0;
  color: var(--text-soft);
}

.progress-status-pill.is-complete {
  background: #e5f7e8;
  color: #2c8559;
}

.progress-overview-card {
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 18px 22px;
  border-radius: 24px;
  border: 1px solid rgba(116,198,157,0.38);
  background: radial-gradient(circle at center, rgba(255,255,255,0.8), rgba(234,249,238,0.95));
}

.progress-overview-ring {
  width: 66px;
  height: 66px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  border: 5px solid rgba(116,198,157,0.26);
  color: var(--green-dark);
  background: rgba(255,255,255,0.9);
}

.progress-overview-ring strong {
  font-size: 20px;
  line-height: 1;
}

.progress-overview-copy {
  display: grid;
  gap: 8px;
}

.progress-overview-copy h3 {
  margin: 0;
  font-size: 18px;
}

.progress-overview-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.progress-meta-count {
  font-size: 13px;
  font-weight: 700;
}

.progress-meta-count.is-green { color: #2fa17a; }
.progress-meta-count.is-amber { color: #d19c2d; }
.progress-meta-count.is-red { color: #df4f65; }
.progress-meta-count.is-unset { color: #b8b1ca; }

.progress-shell-list {
  display: grid;
  gap: 12px;
}

.progress-topic-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 22px;
  border-radius: 18px;
  background: #fff;
  border: 1px solid rgba(116,198,157,0.2);
  box-shadow: 0 8px 22px rgba(45,106,79,0.04);
}

.progress-topic-label {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: var(--green-dark);
}

.progress-topic-label strong {
  font-size: 14px;
}

.progress-topic-icon {
  font-size: 18px;
  line-height: 1;
}

.progress-rag-toggle {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  background: transparent;
  border: 0;
  padding: 0;
}

.progress-rag-toggle button {
  min-width: 126px;
  min-height: 46px;
  border-radius: 999px !important;
  padding-inline: 20px;
}

.progress-topic-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.progress-inline-button {
  min-height: 40px;
  padding: 10px 18px;
}

.question-shell,
.flashcard-shell {
  display: grid;
  gap: 14px;
}

.flashcard-session {
  display: grid;
  gap: 18px;
}

.flashcard-session-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.flashcard-session-chip {
  min-height: 38px;
  padding: 9px 18px;
  border-radius: 999px;
  border: 1px solid rgba(116,198,157,0.2);
  background: #f4fbf6;
  color: var(--green-dark);
  font-size: 14px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

button.flashcard-session-chip {
  cursor: pointer;
}

.flashcard-session-stage {
  display: grid;
  place-items: center;
}

.flashcard-stage-card {
  width: min(760px, 100%);
  min-height: 380px;
  padding: 44px 42px;
  border-radius: 32px;
  display: grid;
  align-items: center;
  justify-items: center;
  gap: 18px;
  background: linear-gradient(140deg, #4a946b, #2f6f4d);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.18);
  box-shadow: 0 20px 44px rgba(45,106,79,0.14);
  text-align: center;
  cursor: pointer;
}

.flashcard-stage-card.is-revealed {
  background: linear-gradient(180deg, #ffffff, #f7fcf8);
  color: var(--text-mid);
  border: 1px solid rgba(116,198,157,0.22);
  cursor: default;
}

.flashcard-stage-eyebrow {
  margin: 0;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 14px;
  font-weight: 800;
  opacity: 0.82;
}

.flashcard-stage-body {
  display: grid;
  gap: 14px;
  max-width: 620px;
}

.flashcard-stage-body h3 {
  margin: 0;
  font-size: clamp(28px, 3.2vw, 40px);
  line-height: 1.2;
  font-weight: 900;
}

.flashcard-stage-body p {
  margin: 0;
  font-size: 17px;
  line-height: 1.65;
}

.flashcard-session-footer {
  display: grid;
  justify-items: center;
  gap: 12px;
}

.flashcard-session-counter {
  margin: 0;
  color: var(--text-soft);
  font-size: 15px;
  font-weight: 700;
}

.flashcard-session-actions {
  justify-content: center;
}

.flashcard-session-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  justify-content: center;
  padding: 18px 24px;
  border-radius: 24px;
  border: 1px solid rgba(116,198,157,0.18);
  background: linear-gradient(180deg, #f7fcf8, #eff8f1);
}

.flashcard-stat-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-mid);
  font-size: 16px;
  font-weight: 700;
}

.flashcard-stat-chip.is-correct {
  color: var(--green-dark);
}

.flashcard-stat-chip.is-retry {
  color: #b45555;
}

.flashcard-prompt-card {
  padding: 24px 26px;
}

.flashcard-prompt-card h4 {
  margin: 0 0 16px;
  font-size: 18px;
  font-weight: 900;
}

.flashcard-prompt-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.flashcard-prompt-chip {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid rgba(116,198,157,0.22);
  background: #fbfefb;
  color: var(--green-dark);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
}

/* ── Flashcard colour fixes ──────────────────────────────────────────────────
   The generic .card:hover rule sets background: var(--green-mist) which
   overwrites the question card's dark-green gradient, leaving white text
   invisible on a light mint background.  Override it here for both states.
   ─────────────────────────────────────────────────────────────────────────── */

/* Question card — keep dark gradient on hover; text stays white */
.flashcard-stage-card:not(.is-revealed):hover {
  background: linear-gradient(140deg, #559b74, #386b4a);
  color: #fff;
}

/* Muted / hint text inside the question card must be light not dark-green */
.flashcard-stage-card .muted,
.flashcard-stage-card .flashcard-hint {
  color: rgba(255, 255, 255, 0.72) !important;
}

/* Hint paragraph styling (shown before the card is flipped) */
.flashcard-hint {
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
  font-style: italic;
  color: rgba(255, 255, 255, 0.72);
}

/* Revealed / answer card — keep white background on hover; no lift (cursor:default) */
.flashcard-stage-card.is-revealed:hover {
  background: linear-gradient(180deg, #ffffff, #f7fcf8);
  transform: none;
  box-shadow: 0 20px 44px rgba(45, 106, 79, 0.14);
}

/* Eyebrow label on the revealed card — use brand green rather than opaque grey */
.flashcard-stage-card.is-revealed .flashcard-stage-eyebrow {
  color: var(--green-mid);
  opacity: 1;
}

.esp-hero-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  padding: 42px 48px;
  border-radius: 30px;
  color: #fff;
  background: linear-gradient(135deg, #2f5941, #365e48);
  box-shadow: 0 18px 40px rgba(45,106,79,0.16);
}

.esp-hero-eyebrow {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
}

.esp-hero-card h2 {
  margin: 0 0 14px;
  font-size: 34px;
  font-weight: 900;
  color: #fff;
}

.esp-hero-card p {
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
  color: rgba(255,255,255,0.92);
}

.esp-hero-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 22px;
}

.esp-metric-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.28);
  background: rgba(255,255,255,0.08);
  font-weight: 700;
}

.esp-hero-icon {
  font-size: 78px;
  line-height: 1;
}

.shell-alert {
  padding: 18px 26px;
  border-radius: 20px;
  border: 2px solid rgba(244,162,97,0.7);
  background: linear-gradient(180deg, #fffaf0, #fff7e8);
  color: #9a6736;
  font-size: 16px;
  line-height: 1.55;
}

.warning-alert strong {
  color: #a1601f;
}

.info-card {
  display: grid;
  gap: 16px;
}

.info-card h3 {
  margin: 0;
  font-size: 20px;
  font-weight: 900;
}

.info-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-soft);
}

.esp-flow-card {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  padding: 18px;
  border-radius: 18px;
  background: linear-gradient(180deg, #f6fcf7, #eef8f0);
  border: 1px solid rgba(116,198,157,0.2);
}

.esp-flow-card span {
  display: grid;
  place-items: center;
  min-height: 40px;
  border-radius: 14px;
  background: #ffffff;
  color: var(--text-mid);
  font-weight: 800;
  font-size: 13px;
}

.settings-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.settings-grid-wide {
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.95fr);
  align-items: start;
}

.settings-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 28px 30px;
  background:
    radial-gradient(circle at top right, rgba(255,255,255,0.12), transparent 32%),
    linear-gradient(135deg, #f8fdf9, #eef8f0);
  border: 1px solid rgba(116,198,157,0.22);
}

.settings-hero-copy {
  display: grid;
  gap: 8px;
}

.settings-kicker {
  margin: 0;
  color: var(--green-mid);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.settings-hero-copy h3 {
  margin: 0;
  font-size: 28px;
  line-height: 1.1;
}

.settings-hero-copy .muted {
  margin: 0;
  max-width: 760px;
}

.settings-hero-graphic {
  display: grid;
  gap: 8px;
  justify-items: end;
  color: rgba(64,145,108,0.86);
  line-height: 1;
}

.settings-hero-graphic span:first-child {
  font-size: 54px;
}

.settings-hero-graphic span:last-child {
  margin-right: 10px;
  font-size: 38px;
}

.settings-profile-card,
.settings-shortcuts-card {
  display: grid;
  gap: 18px;
  min-height: 100%;
}

.settings-profile-card {
  padding: 24px;
}

.settings-profile-top {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 20px;
  align-items: center;
}

.settings-profile-copy {
  display: grid;
  gap: 8px;
}

.settings-profile-copy h3,
.settings-shortcuts-card h3 {
  margin: 0;
  font-size: 24px;
}

.settings-profile-copy .muted,
.settings-shortcuts-card .muted {
  margin: 0;
}

.settings-action-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.settings-utility-button {
  justify-content: center;
  min-height: 48px;
  border-radius: 14px;
  background: #f2f8f3;
  border: 1px solid rgba(116,198,157,0.22);
  color: var(--green-dark);
}

.settings-utility-button:hover {
  background: #e8f4ea;
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 56px;
  padding: 12px 14px;
  margin: 0 0 10px;
  border: 1px solid rgba(116,198,157,0.24);
  border-radius: 14px;
  background: #f2f8f3;
  cursor: pointer;
}

.theme-toggle-copy {
  display: grid;
  gap: 2px;
  color: var(--text-dark);
}

.theme-toggle-copy strong {
  font-family: 'Nunito', sans-serif;
  font-size: 15px;
}

.theme-toggle-label {
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 700;
}

.theme-toggle-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.theme-toggle-track {
  position: relative;
  width: 54px;
  height: 30px;
  flex: 0 0 auto;
  border-radius: 999px;
  background: #c9dfd0;
  box-shadow: inset 0 0 0 1px rgba(45,106,79,0.12);
  transition: background 0.2s ease;
}

.theme-toggle-track::after {
  content: '';
  position: absolute;
  top: 4px;
  left: 4px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--white);
  box-shadow: 0 2px 8px rgba(27,58,45,0.18);
  transition: transform 0.2s ease, background 0.2s ease;
}

.theme-toggle-input:checked + .theme-toggle-track {
  background: var(--green-dark);
}

.theme-toggle-input:checked + .theme-toggle-track::after {
  transform: translateX(24px);
}

.topic-controls-panel {
  display: grid;
  gap: 16px;
  padding: 24px 26px;
  background: linear-gradient(180deg, #ffffff, #f8fdf9);
  border: 1px solid rgba(116,198,157,0.22);
  box-shadow: 0 8px 24px rgba(45,106,79,0.06);
}

.topic-controls-panel #topic-summary {
  margin: 0;
  max-width: 820px;
  font-size: 16px;
  line-height: 1.65;
}

.modal-overlay,
.bug-modal {
  position: fixed;
  inset: 0;
  display: none;
  background: rgba(27,58,45,0.45);
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 80;
}

.modal-overlay.is-open,
.bug-modal.is-open {
  display: flex;
}

.bug-panel {
  width: min(680px, 100%);
  background: var(--white);
  border-radius: 24px;
  padding: 22px;
  box-shadow: var(--shadow-hover);
}

.profile-preview {
  width: 96px;
  height: 96px;
  border-radius: 999px;
  overflow: hidden;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--green-light), var(--green-mid));
  color: var(--white);
  font-size: 28px;
  font-weight: 800;
}

.profile-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.crop-shell {
  background: linear-gradient(180deg, #f7fcf8, #f0faf2);
  border: 1px dashed var(--green-light);
  border-radius: 18px;
  padding: 18px;
  display: grid;
  gap: 12px;
}

.field {
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
}

.bug-form-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.field input,
.field textarea,
.field select {
  width: 100%;
  border: 1px solid rgba(116,198,157,0.45);
  border-radius: 16px;
  padding: 12px 14px;
  background: linear-gradient(180deg, #ffffff, #fbfefc);
}

.card:hover,
.topic-card:hover,
.topic-grid-card:hover,
.download-card:hover,
.audio-card:hover,
.quiz-card:hover,
.practice-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(45,106,79,0.12);
  border-color: rgba(116,198,157,0.28);
}

/* ─── Practice Question Cards ─────────────────────────────────────── */
#practice-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.pq-card {
  background: var(--white);
  border: 1px solid rgba(116,198,157,0.2);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.pq-card-header {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--green-mist);
}

.pq-card-title-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.pq-card-title {
  font-family: 'Nunito', sans-serif;
  font-size: 17px;
  font-weight: 800;
  color: var(--text-dark);
  margin: 0;
}

.pq-total-badge {
  font-size: 12px;
  font-weight: 700;
  color: var(--green-mid);
  background: var(--green-snow);
  border: 1px solid var(--green-pale);
  border-radius: 20px;
  padding: 3px 10px;
  white-space: nowrap;
}

.pq-scenario {
  font-size: 13px;
  font-style: italic;
  color: var(--text-mid);
  background: var(--green-snow);
  border-left: 3px solid var(--green-light);
  border-radius: 0 8px 8px 0;
  padding: 10px 14px;
  margin-bottom: 14px;
  line-height: 1.6;
}

.pq-card-controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.pq-expand-btn {
  font-size: 12px !important;
  padding: 5px 12px !important;
}

.pq-parts {
  padding: 0 20px 20px;
}

.pq-part {
  padding: 16px 0;
  border-bottom: 1px solid var(--green-mist);
}

.pq-part:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.pq-part-header {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 10px;
}

.pq-cw-badge {
  display: inline-block;
  color: #fff;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.06em;
  border-radius: 5px;
  padding: 3px 7px;
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 2px;
}

.pq-ref {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-dark);
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 2px;
}

.pq-question {
  font-size: 14px;
  color: var(--text-dark);
  line-height: 1.55;
  flex: 1;
}

.pq-marks {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-soft);
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 2px;
}

.pq-ms-btn {
  font-size: 12px !important;
  padding: 5px 12px !important;
  margin-bottom: 0;
}

.pq-ms {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.28s ease, opacity 0.2s ease, margin-top 0.2s ease;
  opacity: 0;
  margin-top: 0;
}

.pq-ms.is-open {
  max-height: 800px;
  opacity: 1;
  margin-top: 10px;
}

.pq-ms-inner {
  background: #f9fef9;
  border: 1px solid var(--green-pale);
  border-radius: 10px;
  padding: 14px 16px;
  font-size: 13px;
  color: var(--text-mid);
  line-height: 1.65;
}

.pq-ms-inner strong {
  color: var(--green-dark);
  font-weight: 800;
}

@media (max-width: 600px) {
  .pq-part-header {
    flex-wrap: wrap;
  }
  .pq-marks {
    margin-left: auto;
  }
  .pq-card-header {
    padding: 16px 16px 12px;
  }
  .pq-parts {
    padding: 0 16px 16px;
  }
}

.action-button:hover,
.download-button:hover,
.rag-toggle button:hover {
  transform: translateY(-2px);
}

#qotd-shell .card,
#live-users-list,
#leaderboard-list,
#glossary-list,
#practice-grid,
#quiz-shell,
#flashcard-shell,
#topic-content-shell,
#study-content-shell {
  border-radius: 24px;
}

.footer-note {
  color: var(--text-soft);
  font-size: 13px;
}

@media (max-width: 900px) {
  .home-top-shell {
    grid-template-columns: 1fr;
  }

  .home-profile-dock {
    order: -1;
    justify-content: flex-end;
    padding-top: 0;
    margin-bottom: -6px;
  }

  .card-grid.cols-2 {
    grid-template-columns: 1fr;
  }

  .shell-home-hero,
  .shell-streak-banner {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-graphic {
    display: none;
  }

  .esp-hero-card {
    grid-template-columns: 1fr;
    padding: 30px 28px;
  }

  .esp-hero-icon {
    display: none;
  }

  .esp-flow-card {
    grid-template-columns: 1fr;
  }

  .bug-form-grid {
    grid-template-columns: 1fr;
  }

  .topic-document-shell {
    padding: 26px 24px 30px;
    gap: 24px;
  }

  .topic-document-diagram {
    grid-template-columns: 1fr;
  }

  .topic-document-section-head,
  .topic-navigation-summary {
    grid-template-columns: 1fr;
  }

  .topic-document-section-head {
    display: grid;
  }

  .download-provider-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .settings-grid-wide,
  .settings-profile-top {
    grid-template-columns: 1fr;
  }

  .settings-hero {
    grid-template-columns: 1fr;
    padding: 24px;
  }

  .settings-hero-graphic {
    display: none;
  }

  .progress-topic-row,
  .progress-overview-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .flashcard-stage-card {
    min-height: 320px;
    padding: 32px 26px;
  }

  .flashcard-session-footer,
  .flashcard-session-actions {
    width: 100%;
  }

  .flashcard-session-actions {
    justify-content: stretch;
  }

  .flashcard-session-actions .action-button {
    flex: 1 1 180px;
    justify-content: center;
  }

  .progress-topic-actions,
  .progress-rag-toggle {
    width: 100%;
  }

  .topic-diagram-placeholder {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  #sidebar,
  #sidebar-restore-tab {
    display: none;
  }

  .app-main,
  .app-shell.sidebar-collapsed .app-main {
    width: 100%;
    margin-left: 0;
    padding: calc(var(--header-h) + 16px) 16px calc(var(--tabbar-h) + 20px);
  }

  .mobile-header {
    position: fixed;
    inset: 0 0 auto;
    height: var(--header-h);
    padding: 0 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--white);
    border-bottom: 1px solid var(--green-mist);
    z-index: 50;
  }

  .tab-bar {
    position: fixed;
    inset: auto 0 0;
    height: var(--tabbar-h);
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
    padding: 8px 10px 10px;
    background: var(--white);
    border-top: 1px solid var(--green-mist);
    z-index: 50;
  }

  .tab-bar button {
    border: 0;
    background: transparent;
    border-radius: var(--radius-sm);
    color: var(--text-soft);
  }

  .progress-topic-row {
    padding: 14px 16px;
  }

  .progress-rag-legend,
  .progress-overview-card {
    padding: 14px 16px;
  }

  .progress-rag-toggle button,
  .progress-inline-button {
    width: 100%;
  }

  .glossary-alpha-chip {
    min-width: 36px;
    padding-inline: 10px;
  }

  .glossary-shell-item {
    grid-template-columns: 1fr;
    padding: 14px 16px;
  }

  .flashcard-browser-head,
  .flashcard-browser-row {
    grid-template-columns: 1fr;
    align-items: flex-start;
  }

  .flashcard-browser-open {
    width: 100%;
  }

  .topic-learning-hero,
  .topic-learning-section,
  .topic-checklist-card,
  .topic-navigation-panel,
  .topic-diagram-placeholder {
    padding: 18px;
  }

  .topic-navigation-row {
    width: 100%;
  }

  .topic-navigation-row .action-button {
    width: 100%;
    justify-content: center;
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   TOPIC PAGE REDESIGN — chapter-based textbook reading layout
   All new classes are prefixed topic-chapter-, topic-section-, diagram-slot-,
   topic-toc-, or topic-nav- to avoid collision with existing shell classes.
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Layout wrapper ── */

.topic-page-layout {
  width: 100%;
}

.topic-page-main {
  max-width: 780px;
  width: 100%;
}

/* Override inherited grid gap from old .topic-document-shell */
.topic-page-layout .topic-document-shell {
  display: block;
  gap: 0;
}

/* ── Chapter wrapper ── */

.topic-chapter {
  padding-bottom: 48px;
}

.topic-chapter-sep {
  border: none;
  border-top: 2px dashed rgba(116, 198, 157, 0.35);
  margin: 48px 0;
}

/* ── Chapter header: ref label + centred title + breadcrumb ── */

.topic-chapter-head {
  text-align: center;
  padding: 48px 0 36px;
  display: grid;
  gap: 14px;
  justify-items: center;
}

.topic-chapter-ref {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--green-mid);
  background: var(--green-mist);
  padding: 4px 12px;
  border-radius: 999px;
}

.topic-chapter-title {
  font-family: 'Nunito', sans-serif;
  font-size: 2.15rem;
  font-weight: 900;
  color: var(--green-dark);
  margin: 0;
  line-height: 1.15;
  text-align: center;
}

.topic-chapter-breadcrumb {
  font-size: 0.85rem;
  color: var(--text-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
  line-height: 1.5;
}

.topic-bc-sep {
  color: var(--green-light);
  padding: 0 7px;
  font-size: 1rem;
}

/* ── Introduction block ── */

.topic-chapter-intro {
  background: var(--green-snow);
  border-left: 3px solid var(--green-light);
  padding: 22px 26px;
  border-radius: 0 14px 14px 0;
  margin-bottom: 36px;
}

.topic-chapter-intro p {
  font-size: 1.04rem;
  line-height: 1.82;
  color: var(--text-mid);
  margin: 0 0 14px;
}

.topic-chapter-intro p:last-child {
  margin-bottom: 0;
}

/* ── Sections grid ── */

.topic-chapter-sections {
  display: grid;
  gap: 40px;
}

/* ── Individual section: ## heading + content ── */

.topic-section {
  display: grid;
  gap: 18px;
  scroll-margin-top: 80px;
}

/* h2 within sections — centred with decorative underline */
.topic-section-heading {
  font-family: 'Nunito', sans-serif;
  font-size: 1.22rem;
  font-weight: 800;
  color: var(--green-dark);
  text-align: center;
  margin: 0;
  padding-bottom: 14px;
  position: relative;
}

.topic-section-heading::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 44px;
  height: 2px;
  background: var(--green-light);
  border-radius: 2px;
}

.topic-section-body {
  display: grid;
  gap: 14px;
}

.topic-section-body p {
  margin: 0;
  color: var(--text-mid);
  line-height: 1.8;
}

.topic-section-body strong {
  color: var(--green-dark);
}

.topic-section-body code {
  padding: 2px 8px;
  border-radius: 6px;
  background: var(--green-mist);
  font-size: 0.88em;
  color: var(--green-dark);
}

/* h3 subsection headings — left-aligned */
.topic-section-h3 {
  font-family: 'Nunito', sans-serif;
  font-size: 1.06rem;
  font-weight: 800;
  color: var(--green-dark);
  margin: 6px 0 0;
  line-height: 1.35;
}

/* h4 sub-subsection headings — left-aligned, lighter */
.topic-section-h4 {
  font-family: 'Nunito', sans-serif;
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--green-mid);
  margin: 4px 0 0;
  line-height: 1.35;
}

/* ── Diagram placeholder slots ── */

.diagram-slot {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  border: 1.5px dashed rgba(116, 198, 157, 0.5);
  border-radius: 12px;
  background: var(--green-snow);
  color: var(--text-soft);
}

.diagram-slot-icon {
  font-size: 24px;
  opacity: 0.38;
  flex-shrink: 0;
  line-height: 1;
}

.diagram-slot-label {
  font-size: 13px;
  font-style: italic;
  line-height: 1.45;
  color: var(--text-soft);
}

/* ── Content tables (full-width, alternating rows, no heavy borders) ── */

.topic-table-wrap {
  overflow-x: auto;
  border-radius: 14px;
  border: 1px solid rgba(116, 198, 157, 0.2);
  background: var(--white);
}

.topic-content-table,
.topic-spec-ref-table {
  width: 100%;
  border-collapse: collapse;
}

.topic-content-table th,
.topic-spec-ref-table th {
  padding: 11px 14px;
  background: var(--green-snow);
  color: var(--green-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-align: left;
  border-bottom: 1px solid rgba(116, 198, 157, 0.22);
  vertical-align: top;
}

.topic-content-table td,
.topic-spec-ref-table td {
  padding: 11px 14px;
  color: var(--text-mid);
  line-height: 1.68;
  vertical-align: top;
  border-bottom: 1px solid rgba(116, 198, 157, 0.1);
}

/* Alternating row shading */
.topic-content-table .topic-table-alt td {
  background: rgba(240, 250, 242, 0.55);
}

.topic-spec-ref-table tbody tr:nth-child(even) td {
  background: rgba(240, 250, 242, 0.55);
}

.topic-content-table tbody tr:last-child td,
.topic-spec-ref-table tbody tr:last-child td {
  border-bottom: 0;
}

/* Ref column in spec table — narrow, bold, non-wrapping */
.topic-spec-ref-cell {
  font-weight: 700;
  color: var(--green-dark);
  white-space: nowrap;
  width: 74px;
  font-size: 13px;
}

/* ── Content lists ── */

.topic-content-list {
  margin: 0;
  padding-left: 22px;
  display: grid;
  gap: 8px;
}

.topic-content-list li {
  color: var(--text-mid);
  line-height: 1.72;
}

.topic-content-list-ol {
  padding-left: 24px;
}

/* ── Spec reference section ── */

.topic-spec-table-section {
  padding-top: 8px;
}

/* ── Sources section ── */

.topic-sources-list {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 16px;
}

.topic-sources-item {
  display: grid;
  gap: 4px;
}

.topic-sources-link {
  color: var(--green-dark);
  font-weight: 700;
  text-decoration: none;
  font-size: 14px;
  line-height: 1.4;
  word-break: break-word;
}

.topic-sources-link:hover,
.topic-sources-link:focus-visible {
  text-decoration: underline;
  outline: none;
}

.topic-source-domain {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-soft);
  background: var(--green-mist);
  padding: 2px 8px;
  border-radius: 999px;
}

.topic-source-refs {
  font-size: 12px;
  color: var(--text-soft);
  line-height: 1.5;
}

/* ── On-this-page TOC sidebar ── */

/* Hidden by default; shown as sticky sidebar on wide viewports */
.topic-toc {
  display: none;
}

.topic-toc-inner {
  padding: 16px 14px;
  background: var(--white);
  border-radius: 16px;
  border: 1px solid rgba(116, 198, 157, 0.22);
  box-shadow: 0 4px 16px rgba(45, 106, 79, 0.06);
}

.topic-toc-heading {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-soft);
  margin: 0 0 12px;
}

.topic-toc-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.topic-toc-chapter {
  margin-bottom: 10px;
}

.topic-toc-chapter-link {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--green-dark);
  padding: 4px 0;
  text-decoration: none;
  line-height: 1.4;
  transition: color 0.15s ease;
}

.topic-toc-chapter-link:hover,
.topic-toc-chapter-link:focus-visible {
  color: var(--green-mid);
  outline: none;
}

.topic-toc-sublist {
  margin: 4px 0 0 10px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  border-left: 2px solid var(--green-mist);
  padding-left: 10px;
}

.topic-toc-link {
  display: block;
  font-size: 11px;
  color: var(--text-soft);
  padding: 3px 0;
  text-decoration: none;
  line-height: 1.45;
  transition: color 0.15s ease;
}

.topic-toc-link:hover,
.topic-toc-link:focus-visible {
  color: var(--green-mid);
  outline: none;
}

/* ── Navigation footer ── */

.topic-nav-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 10px;
  padding: 28px 0 0;
  margin-top: 16px;
  border-top: 1px solid rgba(116, 198, 157, 0.2);
  align-items: start;
}

.topic-nav-prev {
  display: flex;
  justify-content: flex-start;
}

.topic-nav-centre {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding-top: 2px;
}

.topic-nav-next {
  display: flex;
  justify-content: flex-end;
}

.topic-nav-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: 14px;
  border: 1px solid rgba(116, 198, 157, 0.28);
  background: var(--white);
  color: var(--green-dark);
  font-family: 'Quicksand', sans-serif;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
  text-align: left;
  max-width: 200px;
}

.topic-nav-button:hover {
  background: var(--green-snow);
  border-color: rgba(64, 145, 108, 0.38);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(45, 106, 79, 0.1);
}

.topic-nav-button.is-disabled {
  opacity: 0.35;
  pointer-events: none;
  cursor: default;
}

.topic-nav-button-fwd {
  text-align: right;
  flex-direction: row-reverse;
}

.topic-nav-overview {
  background: var(--green-snow);
  border-color: rgba(116, 198, 157, 0.35);
  font-size: 12px;
  padding: 10px 14px;
  max-width: none;
  white-space: nowrap;
}

.topic-nav-label {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.topic-nav-hint {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-soft);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.topic-nav-name {
  font-size: 12px;
  font-weight: 700;
  color: var(--green-dark);
  line-height: 1.35;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.topic-nav-arrow {
  font-size: 17px;
  color: var(--green-mid);
  flex-shrink: 0;
}

.open-source-story-card,
.open-source-section {
  margin-top: 22px;
}

.open-source-story-card h3,
.open-source-section-head h3 {
  margin: 0 0 10px;
  color: var(--green-dark);
}

.open-source-story-card p,
.open-source-section-head p {
  max-width: 940px;
}

.open-source-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-top: 20px;
}

.open-source-facts span {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 16px;
  border: 1px solid rgba(45, 106, 79, 0.12);
  border-radius: 12px;
  background: rgba(244, 250, 247, 0.86);
  color: var(--text-mid);
  font-size: 13px;
  font-weight: 700;
}

.open-source-facts strong {
  color: var(--green-dark);
  font-size: 24px;
  line-height: 1;
}

.open-source-section-head {
  margin-bottom: 14px;
}

.open-source-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.open-source-grid.is-compact {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.open-source-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 100%;
}

.open-source-card h4 {
  margin: 0;
  color: var(--green-dark);
  font-size: 18px;
}

.open-source-card p,
.open-source-card li {
  font-size: 14px;
  line-height: 1.55;
}

.open-source-card ul {
  margin: 0 0 4px 18px;
  padding: 0;
  color: var(--text-mid);
}

.open-source-card .download-button {
  margin-top: auto;
  align-self: flex-start;
}

.open-source-type {
  align-self: flex-start;
  padding: 5px 9px;
  border-radius: 999px;
  background: rgba(45, 122, 122, 0.1);
  color: var(--green-dark);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

/* ── Wide viewport: two-column layout with sticky TOC ── */

@media (min-width: 1160px) {
  .topic-page-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 210px;
    align-items: start;
    gap: 44px;
  }

  .topic-page-main {
    grid-column: 1;
  }

  .topic-toc {
    display: block;
    grid-column: 2;
    position: sticky;
    top: 28px;
    max-height: calc(100vh - 80px);
    overflow-y: auto;
  }
}

/* ── Narrow viewport adjustments ── */

@media (max-width: 640px) {
  .topic-chapter-head {
    padding: 32px 0 24px;
  }

  .topic-chapter-title {
    font-size: 1.65rem;
  }

  .topic-chapter-intro {
    padding: 16px 18px;
  }

  .topic-nav-footer {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
  }

  .topic-nav-prev,
  .topic-nav-centre,
  .topic-nav-next {
    justify-content: stretch;
  }

  .topic-nav-button,
  .topic-nav-overview {
    width: 100%;
    max-width: none;
    justify-content: center;
  }

  .topic-nav-button-fwd {
    flex-direction: row;
  }

  .file-browser-head,
  .file-row {
    grid-template-columns: 1fr;
  }

  .file-browser-head {
    align-items: flex-start;
  }

  .file-kind {
    justify-self: flex-start;
  }

  .file-row-actions {
    width: 100%;
  }

  .file-action {
    flex: 1;
  }
}

body.theme-dark {
  --green-dark: #6ee7b7;
  --green-mid: #34d399;
  --green-light: #86efac;
  --green-pale: #214d3b;
  --green-mist: #17382c;
  --green-snow: #030806;
  --white: #0a1712;
  --text-dark: #edfdf4;
  --text-mid: #c5ead7;
  --text-soft: #8ebaa4;
  --red-light: #451b22;
  --amber-light: #412e14;
  --shadow: 0 12px 32px rgba(0,0,0,0.32);
  --shadow-hover: 0 18px 44px rgba(0,0,0,0.46);
  background: #030806;
  color: var(--text-dark);
}

body.theme-dark #sidebar,
body.theme-dark .lite-sidebar,
body.theme-dark .tab-bar,
body.theme-dark .lite-tabbar,
body.theme-dark .card,
body.theme-dark .shell-notice-bar,
body.theme-dark .bug-panel,
body.theme-dark .avatar-panel,
body.theme-dark .settings-profile-card,
body.theme-dark .settings-shortcuts-card,
body.theme-dark .download-card,
body.theme-dark .topic-card,
body.theme-dark .topic-grid-card,
body.theme-dark .quiz-card,
body.theme-dark .live-shell-card,
body.theme-dark .file-browser-section,
body.theme-dark .file-row,
body.theme-dark .leaderboard-item,
body.theme-dark .live-users-item,
body.theme-dark .topic-document-shell,
body.theme-dark .topic-controls-panel,
body.theme-dark .practice-question-card,
body.theme-dark .flashcard-card,
body.theme-dark .quiz-session-card,
body.theme-dark .quiz-results-card {
  background: #08140f;
  border-color: rgba(134,239,172,0.18);
  color: var(--text-dark);
  box-shadow: var(--shadow);
}

body.theme-dark .lu-count-bar {
  border-bottom-color: rgba(134,239,172,0.15);
}

body.theme-dark .lu-count-label {
  color: rgba(255,255,255,0.6);
}

body.theme-dark .lu-name {
  color: #e0f2e9;
}

body.theme-dark .lu-pts {
  color: rgba(255,255,255,0.5);
}

body.theme-dark .lu-empty {
  color: rgba(255,255,255,0.45);
}

body.theme-dark .sidebar-logo-lockup,
body.theme-dark .settings-hero,
body.theme-dark .lite-hero-banner,
body.theme-dark .progress-overview-card,
body.theme-dark .theme-toggle {
  background: linear-gradient(135deg, #0f261d, #06110d);
  border-color: rgba(134,239,172,0.2);
  color: var(--text-dark);
}

body.theme-dark .sidebar-logo,
body.theme-dark #sidebar,
body.theme-dark .lite-sidebar,
body.theme-dark .tab-bar,
body.theme-dark .lite-tabbar {
  border-color: rgba(134,239,172,0.18);
}

body.theme-dark .nav-item,
body.theme-dark .lite-sidebar-nav button,
body.theme-dark .tab-bar button,
body.theme-dark .lite-tabbar button,
body.theme-dark .muted,
body.theme-dark .footer-note,
body.theme-dark .page-intro,
body.theme-dark .shell-small-copy,
body.theme-dark .topic-source-domain,
body.theme-dark .topic-source-refs,
body.theme-dark .file-row-main span,
body.theme-dark .theme-toggle-label {
  color: var(--text-soft);
}

body.theme-dark .nav-item:hover,
body.theme-dark .nav-item.is-active,
body.theme-dark .nav-item.active,
body.theme-dark .lite-sidebar-nav button:hover,
body.theme-dark .lite-sidebar-nav button.is-active,
body.theme-dark .tab-bar button.is-active,
body.theme-dark .lite-tabbar button.is-active,
body.theme-dark .settings-utility-button,
body.theme-dark .action-button {
  background: #17382c;
  color: var(--text-dark);
  border-color: rgba(134,239,172,0.2);
}

body.theme-dark .action-button.is-primary,
body.theme-dark .download-button,
body.theme-dark .quiz-launch-button {
  background: #34d399;
  color: #062118;
}

body.theme-dark input,
body.theme-dark select,
body.theme-dark textarea,
body.theme-dark .input-wrap input,
body.theme-dark .rag-toggle,
body.theme-dark .progress-rag-toggle,
body.theme-dark .content-placeholder,
body.theme-dark .empty-state,
body.theme-dark .topic-table-wrap,
body.theme-dark .topic-content-table,
body.theme-dark .topic-spec-ref-table {
  background: #050f0b;
  border-color: rgba(134,239,172,0.18);
  color: var(--text-dark);
}

body.theme-dark .topic-content-table th,
body.theme-dark .topic-spec-ref-table th,
body.theme-dark .topic-table-alt,
body.theme-dark .progress-topic-row,
body.theme-dark .open-source-fact,
body.theme-dark .open-source-download-card,
body.theme-dark .esp-task-panel,
body.theme-dark .esp-guide-panel {
  background: #07140f;
  border-color: rgba(134,239,172,0.16);
  color: var(--text-dark);
}

body.theme-dark a,
body.theme-dark .settings-kicker,
body.theme-dark .lite-hero-kicker,
body.theme-dark .section-title,
body.theme-dark .page-header h2,
body.theme-dark .page-header h3,
body.theme-dark .logo-wordmark,
body.theme-dark .topic-section-heading,
body.theme-dark .topic-section-h3,
body.theme-dark .topic-source-domain,
body.theme-dark .file-kind {
  color: var(--green-dark);
}