* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Northwest University design kit tokens */
  --nu-blue: #0068bb;
  --nu-alt: #148dcd;
  --nu-sky: #95c5ea;
  --nu-skylight: #b4d4f0;
  --nu-powder: #eaf4fb;
  --nu-navy: #034C87;
  --nu-midnight: #00263d;
  --nu-evergreen: #04505c;
  --nu-leaf: #44ba82;
  --nu-gold: #85754e;
  --nu-tour: #fbd945;
  --nu-amber: #ffbc2d;
  --nu-cloud: #f1f2f2;
  --nu-wisp: #f9f9f9;

  --navy: var(--nu-midnight);
  --blue: var(--nu-blue);
  --blue-dark: var(--nu-navy);
  --sky: var(--nu-alt);
  --blue600: var(--nu-navy);
  --slate50: var(--nu-wisp);
  --slate100: var(--nu-cloud);
  --slate200: #e2e8f0;
  --slate300: #cbd5e1;
  --slate500: #64748b;
  --slate600: #475569;
  --slate700: #334155;
  --accent: var(--nu-gold);
  --accent-2: var(--nu-leaf);
  --accent-3: var(--nu-amber);
}

html { scroll-behavior: auto; }

body.gated .app { display: none; }
.gate {
  position: fixed; inset: 0; z-index: 200;
  background: var(--nu-midnight);
  display: flex; align-items: center; justify-content: center; padding: 24px;
}
.gate[hidden] { display: none !important; }
.gate-card {
  width: min(420px, 100%);
  background: #fff; border-radius: 16px; padding: 32px 28px;
  text-align: center; box-shadow: 0 20px 40px rgba(0,0,0,.25);
}
.gate-logo { height: 64px; width: auto; margin-bottom: 12px; }
.gate-title { font-family: zenon, Georgia, serif; font-size: 22px; color: var(--nu-midnight); }
.gate-sub { font-size: 13px; color: var(--slate600); margin: 6px 0 20px; }
.gate-label { display: block; text-align: left; font-size: 13px; font-weight: 600; color: var(--nu-navy); margin-bottom: 6px; }
.gate-input {
  width: 100%; padding: 12px 14px; border: 1px solid var(--slate200); border-radius: 10px;
  font-size: 16px; font-family: inherit; margin-bottom: 14px;
}
.gate-input:focus { outline: 2px solid rgba(133,117,78,.45); border-color: var(--nu-gold); }
.gate-btn {
  width: 100%; padding: 12px; border: none; border-radius: 10px; cursor: pointer;
  background: var(--nu-gold); color: #fff; font-weight: 700; font-size: 15px; font-family: inherit;
}
.gate-btn:hover { filter: brightness(.95); }
.gate-err { color: #b45309; font-size: 13px; margin-top: 12px; }

.skip-link {
  position: absolute; left: -999px; top: 8px; z-index: 100;
  background: #fff; color: var(--navy); padding: 8px 14px; border-radius: 8px;
  font-weight: 700; font-size: 14px;
}
.skip-link:focus { left: 12px; outline: 3px solid var(--nu-gold); }

body {
  font-family: proxima-nova, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--nu-powder);
  color: var(--slate700);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

/* ---------- Header ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: var(--nu-midnight); color: #fff;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);
}
.header::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: 0; height: 4px;
  background: linear-gradient(90deg, var(--nu-gold), var(--nu-leaf), var(--nu-amber));
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px;
}
.header-left { display: flex; align-items: center; gap: 16px; }
.menu-btn {
  display: none; padding: 8px; border: none; background: transparent; color: #fff;
  border-radius: 8px; cursor: pointer;
}
.menu-btn:hover { background: rgba(255,255,255,.1); }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-badge {
  width: 40px; height: 40px; background: var(--blue); border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 18px; color: #fff;
}
.brand-logo {
  height: 64px; width: auto; display: block;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,.35));
}
.brand-title { font-size: 18px; font-weight: 600; line-height: 1.2; }
.brand-sub { font-size: 12px; color: var(--slate300); }
.header-progress { display: flex; align-items: center; gap: 16px; }
.progress-text { text-align: right; }
.progress-label { font-size: 13px; color: var(--slate300); }
.progress-value { font-size: 14px; font-weight: 600; }
.progress-track {
  width: 128px; height: 8px; background: var(--slate700); border-radius: 999px; overflow: hidden;
}
.progress-fill {
  height: 100%; background: linear-gradient(90deg, var(--nu-gold), var(--nu-leaf));
  border-radius: 999px; transition: width .4s ease;
}

/* ---------- Layout ---------- */
.body-wrap { display: flex; padding-top: 96px; min-height: 100vh; }
.sidebar {
  position: fixed; left: 0; top: 96px; bottom: 0; width: 288px;
  background: #fff; border-right: 1px solid var(--slate200);
  overflow-y: auto; z-index: 40; transition: transform .3s ease;
}
.sidebar-nav { padding: 16px; display: flex; flex-direction: column; gap: 8px; }
.nav-btn {
  width: 100%; display: flex; align-items: flex-start; gap: 12px;
  padding: 12px 16px; border-radius: 12px; border: none; background: transparent;
  text-align: left; cursor: pointer; transition: all .15s ease;
  color: var(--slate600); font-size: 14px; font-weight: 500; font-family: inherit;
}
.nav-btn:hover { background: var(--slate100); }
.nav-btn.active {
  background: var(--nu-midnight);
  color: #fff; box-shadow: 0 10px 15px -3px rgba(0,38,61,.2);
}
.nav-icon {
  width: 32px; height: 32px; border-radius: 8px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--slate200); color: var(--slate600);
}
.nav-btn[data-mod="intro"] .nav-icon { background: #e6eef3; color: var(--nu-midnight); }
.nav-btn[data-mod="m1"] .nav-icon { background: #e8f3fb; color: var(--nu-blue); }
.nav-btn[data-mod="m2"] .nav-icon { background: #e6f4fb; color: var(--nu-alt); }
.nav-btn[data-mod="m3"] .nav-icon { background: #e6f2f3; color: var(--nu-evergreen); }
.nav-btn[data-mod="m4"] .nav-icon { background: #f4f0e8; color: var(--nu-gold); }
.nav-btn[data-mod="m5"] .nav-icon { background: #e8f7ef; color: var(--nu-leaf); }
.nav-btn[data-mod="m6"] .nav-icon { background: #e8eef4; color: var(--nu-navy); }
.nav-btn[data-mod="m7"] .nav-icon { background: #e6f4fb; color: var(--nu-alt); }
.nav-btn[data-mod="m8"] .nav-icon { background: #fff6e0; color: #b7791f; }
.nav-btn[data-mod="m9"] .nav-icon { background: #e6eef3; color: var(--nu-evergreen); }
.nav-btn[data-mod="m10"] .nav-icon { background: #e8f7ef; color: var(--nu-evergreen); }
.nav-btn[data-mod="reflect"] .nav-icon { background: #f4f0e8; color: var(--nu-gold); }
.nav-btn[data-mod="refs"] .nav-icon { background: #f4f0e8; color: var(--nu-gold); }
.nav-btn[data-mod="quiz"] .nav-icon { background: #fff6e0; color: #b7791f; }
.nav-btn[data-mod="flashcards"] .nav-icon { background: #e8f7ef; color: var(--nu-leaf); }
.nav-btn.active .nav-icon { background: var(--nu-gold); color: #fff; }
.nav-label { line-height: 1.3; }
.sidebar-overlay {
  display: none; position: fixed; inset: 0; top: 96px; background: rgba(0,0,0,.4); z-index: 35;
}

.main { flex: 1; margin-left: 288px; display: flex; flex-direction: column; min-width: 0; padding-bottom: 96px; }
.content { flex: 1; max-width: 896px; width: 100%; margin: 0 auto; padding: 32px 24px; }

/* ---------- Module tones (NU design kit) ---------- */
.content {
  --theme-from: var(--nu-midnight);
  --theme-to: var(--nu-navy);
  --theme-accent: var(--nu-gold);
  --theme-cta: var(--nu-gold);
  --theme-cta-ink: #fff;
  --theme-hero-ink: #fff;
  --theme-hero-muted: rgba(255,255,255,.85);
  --theme-soft: var(--nu-powder);
}
.content[data-theme="m1"] {
  --theme-from: var(--nu-navy); --theme-to: var(--nu-blue);
  --theme-accent: var(--nu-alt); --theme-cta: var(--nu-blue); --theme-soft: #e8f3fb;
}
.content[data-theme="m2"] {
  --theme-from: var(--nu-alt); --theme-to: var(--nu-navy);
  --theme-accent: var(--nu-sky); --theme-cta: var(--nu-alt); --theme-soft: #e6f4fb;
}
.content[data-theme="m3"] {
  --theme-from: var(--nu-evergreen); --theme-to: #06707f;
  --theme-accent: var(--nu-leaf); --theme-cta: var(--nu-evergreen); --theme-soft: #e6f2f3;
}
.content[data-theme="m4"] {
  --theme-from: var(--nu-gold); --theme-to: #6e6140;
  --theme-accent: var(--nu-tour); --theme-cta: var(--nu-gold); --theme-soft: #f4f0e8;
}
.content[data-theme="m5"] {
  --theme-from: var(--nu-evergreen); --theme-to: var(--nu-leaf);
  --theme-accent: var(--nu-leaf); --theme-cta: var(--nu-evergreen); --theme-soft: #e8f7ef;
}
.content[data-theme="m6"] {
  --theme-from: var(--nu-navy); --theme-to: var(--nu-midnight);
  --theme-accent: var(--nu-gold); --theme-cta: var(--nu-navy); --theme-soft: #e8eef4;
}
.content[data-theme="m7"] {
  --theme-from: #0e7aa8; --theme-to: var(--nu-alt);
  --theme-accent: var(--nu-sky); --theme-cta: var(--nu-alt); --theme-soft: #e6f4fb;
}
.content[data-theme="m8"] {
  --theme-from: var(--nu-amber); --theme-to: #e59a12;
  --theme-accent: var(--nu-gold); --theme-cta: var(--nu-amber); --theme-cta-ink: var(--nu-midnight);
  --theme-hero-ink: var(--nu-midnight); --theme-hero-muted: rgba(0,38,61,.75); --theme-soft: #fff6e0;
}
.content[data-theme="m9"] {
  --theme-from: var(--nu-midnight); --theme-to: var(--nu-evergreen);
  --theme-accent: var(--nu-leaf); --theme-cta: var(--nu-evergreen); --theme-soft: #e6f2f3;
}
.content[data-theme="m10"] {
  --theme-from: var(--nu-evergreen); --theme-to: var(--nu-leaf);
  --theme-accent: var(--nu-leaf); --theme-cta: var(--nu-evergreen); --theme-soft: #e8f7ef;
}
.content[data-theme="quiz"] {
  --theme-from: var(--nu-gold); --theme-to: var(--nu-amber);
  --theme-accent: var(--nu-amber); --theme-cta: var(--nu-amber); --theme-cta-ink: var(--nu-midnight);
  --theme-hero-ink: var(--nu-midnight); --theme-hero-muted: rgba(0,38,61,.75); --theme-soft: #f4f0e8;
}
.content[data-theme="flashcards"] {
  --theme-from: var(--nu-evergreen); --theme-to: var(--nu-leaf);
  --theme-accent: var(--nu-leaf); --theme-cta: var(--nu-evergreen); --theme-soft: #e8f7ef;
}
.content[data-theme="reflect"] {
  --theme-from: var(--nu-navy); --theme-to: var(--nu-gold);
  --theme-accent: var(--nu-gold); --theme-cta: var(--nu-gold); --theme-soft: #f4f0e8;
}
.content[data-theme="refs"] {
  --theme-from: var(--nu-gold); --theme-to: var(--nu-midnight);
  --theme-accent: var(--nu-gold); --theme-cta: var(--nu-gold); --theme-soft: #f4f0e8;
}

/* ---------- Hero ---------- */
.hero {
  border-radius: 16px; padding: 32px; margin-bottom: 32px;
  color: var(--theme-hero-ink);
  background: linear-gradient(120deg, var(--theme-from) 0%, var(--theme-to) 100%);
  animation: fadeUp .15s ease;
}
.hero-row { display: flex; align-items: center; gap: 16px; }
.hero-icon {
  width: 64px; height: 64px; background: rgba(255,255,255,.2); border-radius: 16px;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.content[data-theme="m8"] .hero-icon,
.content[data-theme="quiz"] .hero-icon { background: rgba(0,38,61,.12); }
.hero-kicker { font-size: 14px; color: var(--theme-hero-muted); }
.hero-title {
  font-family: zenon, Georgia, serif;
  font-feature-settings: "salt" 4;
  font-size: 26px; font-weight: 700; line-height: 1.25;
}
.hero-sub { font-size: 14px; color: var(--theme-hero-muted); margin-top: 6px; }

/* ---------- Module progress bar ---------- */
.module-steps {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  margin-bottom: 24px; padding: 12px 16px;
  background: #fff; border: 1px solid var(--slate200); border-radius: 12px;
}
.module-steps-label { font-size: 13px; font-weight: 600; color: var(--slate500); margin-right: 4px; }
.step-pill {
  padding: 4px 12px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: var(--slate100); color: var(--slate500); border: none; cursor: pointer;
  font-family: inherit; transition: all .15s ease;
}
.step-pill:hover { background: var(--slate200); }
.step-pill.current { background: var(--theme-cta); color: var(--theme-cta-ink); }
.step-pill.done { background: var(--theme-soft); color: var(--theme-cta); }

/* ---------- Cards & content ---------- */
.page-body { display: flex; flex-direction: column; gap: 24px; animation: fadeUp .15s ease; }
.card {
  background: #fff; border: 1px solid var(--slate200); border-radius: 16px;
  padding: 24px; box-shadow: 0 1px 2px rgba(0,0,0,.05);
}
.card p + p { margin-top: 12px; }
.card-blue {
  background: linear-gradient(135deg, var(--nu-powder), #e8f3fb);
  border: 1px solid var(--nu-sky); border-radius: 16px; padding: 24px;
}
.card-blue p + p { margin-top: 12px; }
.card-amber {
  background: #fff8e6; border-left: 4px solid var(--nu-amber); border-radius: 16px; padding: 24px;
}
.card-amber p + p { margin-top: 12px; }
.card-green {
  background: #eefaf4; border: 1px solid #b7e8d0; border-left: 4px solid var(--nu-leaf);
  border-radius: 16px; padding: 24px;
}
.card-green p + p { margin-top: 12px; }
.card-green .section-title { color: var(--nu-evergreen); }
.card-yellow {
  background: #f7f3ea; border: 1px solid #e4d9c2; border-left: 4px solid var(--nu-gold);
  border-radius: 16px; padding: 24px;
}
.card-yellow p + p { margin-top: 12px; }
.card-yellow .section-title { color: var(--nu-gold); }
.card-reflect {
  background: #fff; border: 1px solid var(--slate200);
  border-left: 4px solid var(--nu-navy); border-radius: 16px; padding: 24px;
}
.card-reflect p + p { margin-top: 12px; }
.card-reflect .section-title { color: var(--nu-navy); }
.card-slate {
  background: var(--slate50); border: 1px solid var(--slate200); border-radius: 16px; padding: 24px;
}
.card-slate p + p { margin-top: 12px; }
.quote-card {
  background: #fff; border: 1px solid var(--slate200); border-left: 4px solid var(--nu-gold);
  border-radius: 16px; padding: 24px;
}
.quote-card p + p { margin-top: 12px; }
.quote-attr { font-size: 13px; color: var(--slate500); font-style: italic; margin-top: 12px; }
.quote-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px;
}
@media (max-width: 720px) {
  .quote-grid { grid-template-columns: 1fr; }
}
.idea-list { margin-top: 14px; display: flex; flex-direction: column; gap: 0; }
.idea-item {
  display: flex; gap: 14px; align-items: flex-start;
  position: relative; background: transparent; border: 0;
  padding: 8px 0 12px; cursor: default;
}
.idea-item:not(:last-child)::before {
  content: ""; position: absolute; left: 13px; top: 30px; bottom: -2px;
  width: 2px; background: #e4d9c2;
}
.idea-num {
  flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%;
  background: var(--nu-tour); color: var(--nu-midnight);
  font-weight: 800; font-size: 13px; line-height: 28px; text-align: center;
  position: relative; z-index: 1;
}
.idea-item p { color: var(--slate700); font-size: 15px; padding-top: 3px; }
.cycle-row {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  margin-top: 14px;
}
.cycle-chip {
  background: var(--nu-powder); border: 1px solid var(--nu-sky);
  color: var(--nu-navy); font-weight: 700; font-size: 13px;
  padding: 8px 14px; border-radius: 999px; cursor: default;
}
.cycle-arrow { color: var(--nu-gold); font-weight: 800; font-size: 16px; }

h3.section-title {
  font-family: zenon, Georgia, serif;
  font-feature-settings: "salt" 4;
  font-size: 20px; font-weight: 700; color: var(--navy); margin-bottom: 4px;
}
.card > h3.section-title + h3.section-title,
.quote-card > h3.section-title + h3.section-title,
.card-yellow > h3.section-title + h3.section-title {
  font-size: 17px; margin-top: 10px;
}
.quote-card > h3.section-title { font-size: 16px; font-weight: 600; line-height: 1.45; }
h4.sub-title {
  font-size: 16px; font-weight: 700; color: var(--navy); margin: 20px 0 8px;
}
.card > .accordion { margin-top: 16px; }
.card ul + p,
.card-blue ul + p { margin-top: 12px; }
.acc-body-inner > .card-blue h3.section-title {
  font-family: inherit;
  font-feature-settings: normal;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 0;
}
.acc-body-inner > .card-blue {
  padding: 16px 18px;
  margin-top: 16px;
}
.lead { font-size: 18px; color: var(--slate700); }
.small-note { font-size: 13px; color: var(--slate500); }

ul.bullet-list { margin: 12px 0 0 4px; list-style: none; display: flex; flex-direction: column; gap: 10px; }
ul.bullet-list li { position: relative; padding-left: 24px; color: var(--slate600); }
ul.bullet-list li::before {
  content: ""; position: absolute; left: 4px; top: 10px; width: 8px; height: 8px;
  border-radius: 50%; background: var(--theme-accent, var(--nu-gold));
}
ol.num-list { margin: 12px 0 0 24px; display: flex; flex-direction: column; gap: 10px; color: var(--slate600); }

.eq-list { margin-top: 12px; display: flex; flex-direction: column; gap: 10px; }
.eq-item {
  display: flex; gap: 12px; align-items: flex-start;
  background: #fff; border: 1px solid var(--slate200); border-radius: 12px; padding: 14px 16px;
}
.eq-item .eq-icon { color: var(--theme-cta, var(--nu-gold)); flex-shrink: 0; margin-top: 2px; }
.eq-item p { color: var(--slate700); font-size: 15px; }

/* ---------- Accordion ---------- */
.accordion { display: flex; flex-direction: column; gap: 12px; }
.acc-item { background: #fff; border: 1px solid var(--slate200); border-radius: 14px; overflow: hidden; }
.acc-head {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 16px 20px; background: transparent; border: none; cursor: pointer;
  font-family: inherit; font-size: 15px; font-weight: 600; color: var(--navy); text-align: left;
}
.acc-head:hover { background: var(--slate50); }
.acc-head .chev { transition: transform .25s ease; color: var(--slate500); flex-shrink: 0; }
.acc-item.open .acc-head .chev { transform: rotate(180deg); }
.acc-item.open .acc-head { background: var(--theme-soft, var(--nu-powder)); }
.acc-body { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.acc-item.open .acc-body { max-height: 8000px; }

.domain-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px;
}
.domain-card {
  background: #fff; border: 1px solid var(--slate200); border-radius: 14px; padding: 18px 20px;
}
.domain-card .section-title { font-size: 16px; margin-bottom: 8px; }
.data-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.data-table th, .data-table td {
  border: 1px solid var(--slate200); padding: 10px 12px; text-align: left; vertical-align: top;
}
.data-table th { background: var(--slate50); color: var(--navy); font-weight: 700; }
@media (max-width: 640px) {
  .domain-grid { grid-template-columns: 1fr; }
}
.acc-body-inner { padding: 0 20px 20px; color: var(--slate600); }
.acc-body-inner p + p { margin-top: 10px; }
.acc-body-inner ul { margin-top: 10px; }

/* ---------- TOC ---------- */
.toc-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.toc-item {
  display: flex; align-items: center; gap: 12px; padding: 14px 16px;
  background: #fff; border: 1px solid var(--slate200); border-radius: 14px;
  cursor: pointer; transition: all .15s ease; text-align: left; font-family: inherit;
}
.toc-item:hover { border-color: var(--nu-gold); box-shadow: 0 4px 12px rgba(133,117,78,.18); transform: translateY(-1px); }
.toc-item .nav-icon { background: var(--nu-powder); color: var(--nu-navy); }
.toc-item span { font-size: 14px; font-weight: 600; color: var(--slate700); line-height: 1.35; }
.toc-item.soon { opacity: .55; cursor: default; }
.toc-item.soon:hover { border-color: var(--slate200); box-shadow: none; transform: none; }

/* ---------- Video embed ---------- */
.video-wrap {
  position: relative; width: 100%; padding-bottom: 56.25%; border-radius: 16px;
  overflow: hidden; border: 1px solid var(--slate200); background: #000;
}
.video-wrap iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.video-link { color: var(--nu-navy); font-weight: 600; text-decoration: none; }
.video-link:hover { text-decoration: underline; }

/* ---------- Pager ---------- */
.pager {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--slate200);
}
.pager-btn {
  display: inline-flex; align-items: center; gap: 8px; height: 38px; padding: 0 16px;
  border-radius: 8px; font-size: 14px; font-weight: 500; cursor: pointer;
  font-family: inherit; transition: all .15s ease;
}
.pager-btn.prev { background: #fff; border: 1px solid var(--slate200); color: var(--slate700); box-shadow: 0 1px 2px rgba(0,0,0,.05); }
.pager-btn.prev:hover:not(:disabled) { background: var(--slate100); }
.pager-btn.next {
  background: var(--theme-cta); border: 1px solid var(--theme-cta); color: var(--theme-cta-ink);
}
.pager-btn.next:hover { filter: brightness(.92); }
.pager-btn:disabled { opacity: .5; cursor: default; pointer-events: none; }
.pager-count { font-size: 14px; color: var(--slate500); }

/* ---------- Footer ---------- */
.footer {
  padding: 24px; text-align: center; font-size: 13px; color: var(--slate500);
  border-top: 1px solid var(--slate200); background: #fff;
}
.footer p + p { margin-top: 8px; }
.footer-copy { margin-top: 8px; }

/* ---------- Quiz ---------- */
.quiz-score {
  position: sticky; top: 112px; z-index: 10;
  background: linear-gradient(90deg, var(--nu-gold), var(--nu-amber)); color: var(--nu-midnight);
  border-radius: 14px; padding: 16px 20px; display: flex; align-items: center;
  justify-content: space-between; gap: 12px; flex-wrap: wrap;
  box-shadow: 0 10px 20px -8px rgba(133,117,78,.45);
}
.quiz-score .score-num { font-size: 22px; font-weight: 700; }
.quiz-reset {
  background: rgba(0,38,61,.12); color: var(--nu-midnight); border: none; border-radius: 8px;
  padding: 8px 14px; font-size: 13px; font-weight: 600; cursor: pointer; font-family: inherit;
}
.quiz-reset:hover { background: rgba(0,38,61,.2); }
.card-blue .quiz-reset {
  background: rgba(0, 38, 61, .08);
  color: var(--nu-navy);
}
.card-blue .quiz-reset:hover { background: rgba(0, 38, 61, .14); }
.quiz-group-title {
  font-size: 17px; font-weight: 700; color: var(--navy);
  padding-bottom: 10px; border-bottom: 2px solid var(--slate200);
}
.q-card { background: #fff; border: 1px solid var(--slate200); border-radius: 16px; padding: 22px; }
.q-head { display: flex; gap: 12px; align-items: flex-start; justify-content: space-between; margin-bottom: 14px; }
.q-head .q-text { margin-bottom: 0; flex: 1; }
.q-text { font-weight: 600; color: var(--navy); margin-bottom: 14px; font-size: 15px; }
.item-listen {
  display: inline-flex; align-items: center; gap: 5px; flex-shrink: 0;
  padding: 6px 10px; border-radius: 8px; border: 1px solid var(--nu-amber);
  background: var(--nu-amber); color: var(--nu-midnight);
  font-size: 12px; font-weight: 700; line-height: 1;
  cursor: pointer; font-family: inherit;
}
.item-listen svg { flex-shrink: 0; }
.item-listen:hover { filter: brightness(.95); }
.item-listen.playing {
  background: var(--nu-midnight); border-color: var(--nu-midnight); color: #fff;
}
.item-listen:focus-visible { outline: 3px solid var(--nu-gold); outline-offset: 2px; }
.q-options { display: flex; flex-direction: column; gap: 8px; }
.q-opt {
  display: flex; gap: 12px; align-items: flex-start; text-align: left;
  padding: 12px 14px; border-radius: 10px; border: 1px solid var(--slate200);
  background: var(--slate50); cursor: pointer; font-family: inherit; font-size: 14px;
  color: var(--slate700); transition: all .15s ease; width: 100%;
}
.q-opt:hover:not(:disabled) { border-color: var(--nu-gold); background: #f7f3ea; }
.q-opt .opt-letter {
  width: 24px; height: 24px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--slate200); color: var(--slate600); font-size: 12px; font-weight: 700;
}
.q-opt.correct { border-color: var(--nu-leaf); background: #eefaf4; }
.q-opt.correct .opt-letter { background: var(--nu-evergreen); color: #fff; }
.q-opt.incorrect { border-color: #ef4444; background: #fef2f2; }
.q-opt.incorrect .opt-letter { background: #ef4444; color: #fff; }
.q-opt.dim { opacity: .55; }
.q-explain {
  margin-top: 14px; padding: 14px 16px; border-radius: 10px; font-size: 14px;
  background: #eefaf4; border: 1px solid #b7e8d0; color: var(--nu-evergreen);
  animation: fadeUp .15s ease;
}
.q-explain strong { display: block; margin-bottom: 4px; }

/* ---------- References ---------- */
.ref-list { display: flex; flex-direction: column; gap: 14px; }
.ref-item {
  background: #fff; border: 1px solid var(--slate200); border-radius: 12px;
  padding: 14px 18px; font-size: 14px; color: var(--slate600); padding-left: 40px; text-indent: -22px;
}
.ref-item a { color: var(--nu-navy); text-decoration: none; word-break: break-all; }
.ref-item a:hover { text-decoration: underline; }

/* ---------- Animations ---------- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Study tools: notes ---------- */
.notes-card {
  background: #fff; border: 1px dashed var(--nu-gold); border-radius: 16px; padding: 24px;
}
.notes-card textarea {
  width: 100%; min-height: 110px; margin-top: 12px; padding: 12px 14px;
  border: 1px solid var(--slate200); border-radius: 10px; resize: vertical;
  font-family: inherit; font-size: 14px; color: var(--slate700); background: var(--slate50);
}
.notes-card textarea:focus { outline: 2px solid rgba(133,117,78,.4); border-color: var(--nu-gold); }
.notes-saved { font-size: 12px; color: var(--nu-evergreen); margin-top: 6px; min-height: 16px; }

/* ---------- Study tools: review ---------- */
.review-btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px;
  border-radius: 999px; border: 1px solid var(--slate200); background: #fff;
  font-size: 13px; font-weight: 600; color: var(--slate600); cursor: pointer; font-family: inherit;
}
.review-btn:hover { border-color: var(--nu-gold); color: var(--nu-gold); }
.review-btn.marked { background: #f7f3ea; border-color: var(--nu-gold); color: var(--nu-gold); }
.review-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.review-chip {
  display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px;
  background: #fff; border: 1px solid var(--slate200); border-radius: 999px;
  font-size: 13px; color: var(--slate700); cursor: pointer; font-family: inherit;
}
.review-chip:hover { border-color: var(--nu-gold); color: var(--nu-gold); }

/* ---------- Study tools: flashcards ---------- */
.fc-tip { font-size: 13px; color: var(--slate500); }
.fc-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.fcard-wrap { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; }
.fcard { perspective: 1000px; height: 190px; cursor: pointer; position: relative; width: 100%; }
.fcard-listen { padding: 6px 8px; }
.fcard-inner {
  position: relative; width: 100%; height: 100%;
  transition: transform .5s ease; transform-style: preserve-3d;
}
.fcard.flipped .fcard-inner { transform: rotateY(180deg); }
.fcard-face {
  position: absolute; inset: 0; backface-visibility: hidden; -webkit-backface-visibility: hidden;
  border-radius: 16px; padding: 18px; display: flex; flex-direction: column;
  align-items: center; justify-content: center; text-align: center; gap: 8px;
}
.fcard-front {
  background: linear-gradient(135deg, var(--fc-from, var(--nu-evergreen)), var(--fc-to, var(--nu-leaf)));
  color: var(--fc-ink, #fff);
  font-weight: 700; font-size: 16px; box-shadow: 0 6px 16px -6px rgba(0, 38, 61, .28);
}
.fcard-front .fc-tag {
  font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em;
  background: var(--fc-tag-bg, rgba(255,255,255,.2)); padding: 3px 10px; border-radius: 999px;
}
.fcard-back {
  background: #fff; border: 1px solid var(--slate200); border-top: 4px solid var(--fc-from, var(--nu-evergreen));
  color: var(--slate600);
  font-size: 13px; transform: rotateY(180deg); overflow-y: auto; line-height: 1.5;
}
.fcard-m1 { --fc-from: var(--nu-tour); --fc-to: var(--nu-amber); --fc-ink: var(--nu-midnight); --fc-tag-bg: rgba(0,38,61,.12); }
.fcard-m2 { --fc-from: var(--nu-leaf); --fc-to: var(--nu-evergreen); }
.fcard-m3 { --fc-from: var(--nu-evergreen); --fc-to: #06707f; }
.fcard-m4 { --fc-from: var(--nu-evergreen); --fc-to: var(--nu-leaf); }
.fcard-m5 { --fc-from: var(--nu-amber); --fc-to: #e59a12; --fc-ink: var(--nu-midnight); --fc-tag-bg: rgba(0,38,61,.12); }
.fcard-m6 { --fc-from: var(--nu-midnight); --fc-to: var(--nu-navy); }
.fcard-m7 { --fc-from: #0e7aa8; --fc-to: var(--nu-alt); }
.fcard-m8 { --fc-from: var(--nu-navy); --fc-to: var(--nu-blue); }
.fcard-m9 { --fc-from: var(--nu-midnight); --fc-to: var(--nu-evergreen); }
.fcard-m10 { --fc-from: var(--nu-alt); --fc-to: var(--nu-navy); }

/* ---------- ADA audio bar ---------- */
.audio-bar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px 16px;
  background: #fff; border: 1px solid var(--slate200); border-radius: 14px;
  padding: 14px 16px; margin-bottom: 16px;
}
.hero .audio-bar {
  margin: 18px 0 0;
  background: rgba(255,255,255,.96);
  border-color: rgba(255,255,255,.35);
}
.audio-bar-left { display: flex; align-items: flex-start; gap: 10px; flex: 1; min-width: 220px; }
.audio-icon { color: var(--nu-gold); margin-top: 2px; }
.audio-title { font-size: 14px; font-weight: 700; color: var(--navy); }
.audio-hint { font-size: 12px; color: var(--slate500); margin-top: 2px; }
.audio-controls { display: flex; flex-wrap: wrap; gap: 8px; }
.audio-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 12px; border-radius: 8px; border: 1px solid var(--slate200);
  background: var(--slate50); color: var(--slate700); font-size: 13px; font-weight: 600;
  cursor: pointer; font-family: inherit;
}
.audio-btn:hover:not(:disabled) { background: var(--slate100); }
.audio-btn.primary { background: var(--nu-amber); border-color: var(--nu-amber); color: var(--nu-midnight); }
.audio-btn.primary:hover:not(:disabled) { filter: brightness(.95); }
.audio-btn:disabled { opacity: .45; cursor: not-allowed; }
.audio-btn:focus-visible { outline: 3px solid var(--nu-gold); outline-offset: 2px; }
.audio-status { width: 100%; font-size: 12px; color: var(--nu-gold); min-height: 1em; }
.audio-bar audio { width: min(100%, 420px); height: 40px; }

/* ---------- Marker.io: NU Tour yellow report button ---------- */
.report-issue-btn {
  position: fixed; right: 0; top: 46%; z-index: 55;
  transform: translateY(-50%);
  padding: 16px 10px; border: none; border-radius: 10px 0 0 10px; cursor: pointer;
  background: var(--nu-tour); color: var(--nu-midnight);
  font-family: inherit; font-size: 13px; font-weight: 700; line-height: 1.15;
  letter-spacing: .04em;
  writing-mode: vertical-rl;
  box-shadow: -6px 8px 18px -10px rgba(0, 38, 61, .35);
}
.report-issue-btn:hover { filter: brightness(.96); }
.report-issue-btn:focus-visible { outline: 3px solid var(--nu-gold); outline-offset: 3px; }
body.gated .report-issue-btn { display: none; }
@media (max-width: 1023px) {
  .report-issue-btn {
    top: auto; right: auto; left: 16px; bottom: 20px; transform: none;
    writing-mode: horizontal-tb; letter-spacing: 0;
    padding: 12px 16px; font-size: 13px; border-radius: 999px;
    box-shadow: 0 8px 16px -8px rgba(0, 38, 61, .35);
  }
}

/* ---------- Study tools: pomodoro ---------- */
.pomo-fab {
  position: fixed; right: 20px; bottom: 20px; z-index: 60;
  display: flex; align-items: center; gap: 8px; padding: 12px 18px;
  border-radius: 999px; border: none; cursor: pointer; font-family: inherit;
  background: linear-gradient(90deg, var(--nu-gold), var(--nu-leaf)); color: #fff;
  font-size: 14px; font-weight: 700; box-shadow: 0 10px 20px -6px rgba(133,117,78,.5);
}
.pomo-fab:hover { transform: translateY(-2px); }
.pomo-panel {
  position: fixed; right: 20px; bottom: 148px; z-index: 60; width: 240px;
  background: #fff; border: 1px solid var(--slate200); border-radius: 16px;
  box-shadow: 0 20px 40px -12px rgba(0,0,0,.25); padding: 18px; display: none;
  animation: fadeUp .15s ease;
}
.pomo-panel.open { display: block; }
.pomo-mode { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--nu-gold); text-align: center; }
.pomo-time { font-size: 40px; font-weight: 700; color: var(--navy); text-align: center; font-variant-numeric: tabular-nums; margin: 6px 0 12px; }
.pomo-controls { display: flex; gap: 8px; justify-content: center; }
.pomo-btn {
  padding: 8px 14px; border-radius: 8px; border: 1px solid var(--slate200);
  background: var(--slate50); font-size: 13px; font-weight: 600; color: var(--slate700);
  cursor: pointer; font-family: inherit;
}
.pomo-btn.primary { background: var(--nu-evergreen); border-color: var(--nu-evergreen); color: #fff; }
.pomo-btn.primary:hover { background: #033f48; }

/* ---------- Sort the Message ---------- */
.sort-board { display: flex; flex-direction: column; gap: 16px; }
.sort-hint { font-size: 13px; color: var(--slate500); margin: 6px 0 12px; }
.sort-pool {
  display: flex; flex-direction: column; gap: 10px; min-height: 48px;
}
.sort-reset {
  margin-top: 14px; background: rgba(0,38,61,.08); color: var(--nu-navy);
  border: none; border-radius: 8px; padding: 8px 14px;
  font-size: 13px; font-weight: 600; cursor: pointer; font-family: inherit;
}
.sort-reset:hover { background: rgba(0,38,61,.14); }
.sort-bins {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px;
}
.sort-bin {
  background: #fff; border: 1px solid var(--slate200);
  border-left: 4px solid var(--sort-accent, var(--nu-gold));
  border-radius: 16px; padding: 16px;
  min-height: 160px; display: flex; flex-direction: column; gap: 10px;
}
.sort-bin-moment { --sort-accent: var(--nu-leaf); }
.sort-bin-private { --sort-accent: var(--nu-navy); }
.sort-bin-revise { --sort-accent: var(--nu-amber); }
.sort-bin-supervisor { --sort-accent: var(--nu-gold); }
.sort-bin.drag-over {
  background: var(--nu-powder);
  box-shadow: inset 0 0 0 2px var(--sort-accent, var(--nu-gold));
}
.sort-board.is-picking .sort-bin { cursor: pointer; }
.sort-empty { font-size: 13px; color: var(--slate500); font-style: italic; }
.sort-card {
  background: #fff; border: 1px solid var(--slate200);
  border-left: 4px solid var(--nu-gold); border-radius: 12px;
  padding: 12px 14px; cursor: grab; display: flex; flex-direction: column; gap: 10px;
}
.sort-card p { color: var(--slate700); font-size: 15px; line-height: 1.45; }
.sort-card.dragging { opacity: .55; }
.sort-card.picked { outline: 3px solid var(--nu-gold); outline-offset: 2px; }
.sort-place {
  display: flex; align-items: center; gap: 8px;
}
.sort-place-label { font-size: 12px; font-weight: 600; color: var(--slate500); white-space: nowrap; }
.sort-place select {
  flex: 1; min-width: 0; font-family: inherit; font-size: 13px;
  padding: 6px 8px; border: 1px solid var(--slate200); border-radius: 8px;
  background: var(--slate50); color: var(--nu-navy);
}
.sort-place select:focus-visible { outline: 3px solid var(--nu-gold); outline-offset: 2px; }
@media (max-width: 720px) {
  .sort-bins { grid-template-columns: 1fr; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1023px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); box-shadow: 0 0 40px rgba(0,0,0,.2); }
  .sidebar-overlay.show { display: block; }
  .main { margin-left: 0; }
  .menu-btn { display: block; }
  .header-progress { display: none; }
}
@media (min-width: 1024px) {
  .header-progress { display: flex; }
}
@media (max-width: 560px) {
  .hero { padding: 22px; }
  .hero-title { font-size: 21px; }
  .hero-icon { width: 48px; height: 48px; }
  .brand-title { font-size: 16px; }
  .pager-btn span.btn-text { display: none; }
  .q-head { flex-direction: column; align-items: stretch; }
  .q-head .item-listen { align-self: flex-start; }
}