:root {
  --bg: #151013;
  --bg-strong: #0f0a0c;
  --bg-band: rgba(28, 20, 24, 0.84);
  --panel: rgba(34, 24, 29, 0.9);
  --panel-soft: rgba(46, 34, 39, 0.78);
  --line: rgba(244, 225, 197, 0.14);
  --line-strong: rgba(244, 225, 197, 0.24);
  --text: #f5ecdf;
  --muted: #c7b7a9;
  --silverquill: #ece6d8;
  --prismari: #ff7b5c;
  --witherbloom: #95d15d;
  --lorehold: #f4ad51;
  --quandrix: #5dd2c0;
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.32);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "IBM Plex Sans", sans-serif;
  color: var(--text);
  position: relative;
  background:
    radial-gradient(circle at top left, rgba(255, 123, 92, 0.16), transparent 30%),
    radial-gradient(circle at top right, rgba(93, 210, 192, 0.14), transparent 30%),
    radial-gradient(circle at bottom left, rgba(149, 209, 93, 0.1), transparent 26%),
    linear-gradient(180deg, #20151a 0%, #110c0e 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.5), transparent 90%);
}

a {
  color: inherit;
}

button,
input,
select {
  font: inherit;
}

button {
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  min-height: 48px;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
a:focus-visible {
  outline: 2px solid rgba(93, 210, 192, 0.75);
  outline-offset: 2px;
}

.shell {
  width: min(1320px, calc(100% - 28px));
  margin: 0 auto;
  display: grid;
  gap: 24px;
  padding: 18px 0 48px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(15, 10, 12, 0.82);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  width: min(1320px, calc(100% - 28px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 24px;
  padding: 18px 0;
}

.brand {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.brand-copy {
  display: grid;
  gap: 6px;
}

.brand-mark {
  width: 72px;
  min-width: 72px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 2px;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  background:
    linear-gradient(160deg, rgba(255, 123, 92, 0.24), rgba(255, 123, 92, 0.04)),
    linear-gradient(320deg, rgba(93, 210, 192, 0.18), rgba(93, 210, 192, 0.04)),
    rgba(255, 255, 255, 0.03);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
  font-family: "Cormorant Garamond", serif;
}

.brand-mark span {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1;
}

.brand-mark small {
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand h1 {
  margin: 0;
  font-family: "Cormorant Garamond", serif;
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: 0;
}

.brand p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 68ch;
}

.status-panel {
  display: grid;
  gap: 12px;
  align-content: start;
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.top-actions {
  display: flex;
  justify-content: flex-start;
  gap: 12px;
  flex-wrap: wrap;
}

.pill,
.nav-chip,
.ghost-button,
.action-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: var(--radius);
}

.pill,
.nav-chip,
.ghost-button {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line-strong);
  color: var(--text);
}

.pill {
  min-height: 64px;
  align-items: flex-start;
  flex-direction: column;
  justify-content: center;
  padding: 12px 14px;
}

.pill-label {
  color: var(--muted);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.stat-pill strong {
  font-size: 1.2rem;
}

.action-button {
  background: linear-gradient(135deg, rgba(255, 123, 92, 0.92), rgba(244, 173, 81, 0.92));
  color: #1a0d08;
  font-weight: 700;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.action-button.secondary {
  background: linear-gradient(135deg, rgba(93, 210, 192, 0.94), rgba(149, 209, 93, 0.88));
  color: #0d1713;
}

.nav-shell {
  display: grid;
  gap: 14px;
  padding: 18px;
  margin-top: -4px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01)),
    rgba(17, 12, 14, 0.68);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.nav-head {
  display: grid;
  gap: 4px;
}

.nav-head p {
  margin: 0;
  color: var(--muted);
  max-width: 60ch;
}

.section-nav {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
}

.nav-chip {
  min-height: 72px;
  align-items: flex-start;
  justify-content: flex-start;
  flex-direction: column;
  padding: 12px 14px;
  gap: 6px;
  text-align: left;
}

.nav-chip.active {
  border-color: rgba(93, 210, 192, 0.5);
  background:
    linear-gradient(180deg, rgba(93, 210, 192, 0.12), rgba(93, 210, 192, 0.04)),
    rgba(255, 255, 255, 0.04);
}

.chip-index {
  color: var(--muted);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.chip-label {
  font-weight: 600;
  line-height: 1.2;
}

.dashboard {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 24px;
}

.panel,
.card-detail,
.explorer-list,
.quiz-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.panel,
.quiz-panel {
  padding: 18px;
}

.module,
.reference-panel {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 18px;
  padding: 24px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0)),
    var(--bg-band);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.module::before,
.reference-panel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 1px;
  background: linear-gradient(90deg, rgba(93, 210, 192, 0.45), rgba(255, 123, 92, 0.2), transparent 75%);
}

.module[id],
.quiz-panel[id] {
  scroll-margin-top: 110px;
}

.hero-panel {
  display: grid;
  gap: 18px;
}

.eyebrow {
  color: var(--muted);
  text-transform: uppercase;
  font-size: 0.76rem;
  letter-spacing: 0.06em;
}

.hero-panel h2,
.module h2,
.explorer-header h2,
.quiz-panel h2,
.reference-panel h2 {
  margin: 0;
  font-family: "Cormorant Garamond", serif;
  font-size: 2.15rem;
  line-height: 0.95;
}

.hero-panel p,
.module p,
.reference-panel p,
.quiz-meta,
.stat-label,
.fact-list li,
.checklist li,
.core-grid li,
.source-list li {
  color: var(--muted);
}

.hero-panel p,
.module > p,
.reference-panel p,
.quiz-panel > p {
  max-width: 70ch;
  line-height: 1.5;
}

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

.stat-box {
  padding: 14px;
  border-radius: var(--radius);
  background: var(--panel-soft);
  border: 1px solid var(--line);
}

.stat-box strong {
  display: block;
  font-size: 1.3rem;
  margin-bottom: 4px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-actions > * {
  flex: 0 0 auto;
}

.study-art {
  display: grid;
  gap: 16px;
  align-content: start;
}

.art-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.art-grid .art-tile:first-child {
  grid-column: span 2;
  min-height: 240px;
}

.art-tile {
  display: block;
  aspect-ratio: 0.74;
  border-radius: var(--radius);
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
  min-height: 180px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  text-decoration: none;
}

.art-tile::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.05), rgba(0, 0, 0, 0.7));
}

.art-caption {
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 10px;
  z-index: 1;
  font-size: 0.86rem;
  font-weight: 600;
}

.fact-list,
.checklist,
.core-grid,
.source-list,
.mini-list {
  margin: 0;
  padding-left: 18px;
}

.study-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.8fr) minmax(0, 1.2fr);
  gap: 18px;
}

.module-stack {
  display: grid;
  gap: 24px;
}

.checklist {
  display: grid;
  gap: 12px;
  padding-left: 0;
  list-style: none;
}

.check-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
}

.check-item input {
  width: 20px;
  height: 20px;
  margin: 0;
}

.tag-row,
.mechanic-tags,
.source-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 10px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  font-size: 0.82rem;
  color: var(--text);
  text-decoration: none;
}

.subsection {
  display: grid;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.college-grid,
.mechanics-grid,
.core-grid-wrap,
.event-grid,
.summary-grid {
  display: grid;
  gap: 14px;
}

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

.mechanics-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.event-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.info-block {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 14px;
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02)),
    rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.info-block h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.info-block p {
  margin: 0;
}

.info-block strong {
  color: var(--text);
}

.info-actions {
  margin: 12px 0;
}

.answer-panel {
  margin: 12px 0;
  padding: 12px;
  border-radius: var(--radius);
  border: 1px solid rgba(93, 210, 192, 0.24);
  background: rgba(93, 210, 192, 0.08);
  color: #e7f6f2;
  line-height: 1.45;
}

.peek-card {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 40;
  width: min(460px, calc(100vw - 24px));
  max-height: min(78vh, 860px);
  overflow: auto;
  padding: 16px;
  display: grid;
  gap: 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02)),
    rgba(23, 16, 19, 0.96);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(14px);
}

.peek-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.peek-card-head strong {
  display: block;
  font-size: 1.05rem;
}

.peek-card-body {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 14px;
}

.peek-card-art img {
  width: 100%;
  display: block;
  border-radius: 6px;
}

.peek-card-copy {
  display: grid;
  gap: 12px;
}

.peek-card-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.peek-close {
  min-height: 40px;
  padding: 8px 12px;
}

.accent-silverquill {
  box-shadow: inset 4px 0 0 var(--silverquill);
}

.accent-prismari {
  box-shadow: inset 4px 0 0 var(--prismari);
}

.accent-witherbloom {
  box-shadow: inset 4px 0 0 var(--witherbloom);
}

.accent-lorehold {
  box-shadow: inset 4px 0 0 var(--lorehold);
}

.accent-quandrix {
  box-shadow: inset 4px 0 0 var(--quandrix);
}

.explorer {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  gap: 18px;
}

.explorer-header {
  gap: 16px;
}

.filters {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  padding: 12px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.filters input,
.filters select {
  width: 100%;
  min-height: 48px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 12px;
}

.filters input[type="search"] {
  grid-column: 1 / span 2;
}

.explorer-list {
  padding: 12px;
  max-height: 860px;
  overflow: auto;
}

.explorer-list-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 8px 14px;
}

.explorer-list-head p {
  margin: 4px 0 0;
}

.card-row-wrap {
  display: grid;
  gap: 10px;
}

.card-row {
  width: 100%;
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  text-align: left;
  padding: 10px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--text);
}

.card-row:hover,
.card-row.active {
  border-color: rgba(93, 210, 192, 0.24);
  background:
    linear-gradient(90deg, rgba(93, 210, 192, 0.08), transparent 35%),
    rgba(255, 255, 255, 0.04);
}

.card-row img,
.card-detail img {
  width: 100%;
  display: block;
  border-radius: 6px;
}

.card-thumb {
  width: 62px;
  aspect-ratio: 0.72;
  overflow: hidden;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
}

.card-name {
  font-weight: 600;
  margin-bottom: 4px;
}

.card-meta {
  font-size: 0.85rem;
  color: var(--muted);
}

.card-detail {
  padding: 18px;
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 18px;
  align-content: start;
}

.card-detail-desktop {
  position: sticky;
  top: 106px;
  align-self: start;
}

.card-detail-inline {
  display: none;
}

.card-detail-body {
  display: grid;
  gap: 12px;
}

.oracle {
  white-space: pre-wrap;
  line-height: 1.45;
  color: #eadfce;
}

.quiz-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.8fr);
  gap: 18px;
}

.quiz-options {
  display: grid;
  gap: 10px;
}

.quiz-option {
  width: 100%;
  justify-content: flex-start;
  text-align: left;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  color: var(--text);
}

.quiz-option.correct {
  border-color: rgba(149, 209, 93, 0.6);
  background: rgba(149, 209, 93, 0.15);
}

.quiz-option.wrong {
  border-color: rgba(255, 123, 92, 0.6);
  background: rgba(255, 123, 92, 0.12);
}

.quiz-feedback {
  min-height: 68px;
  padding: 12px 0 0;
}

.muted {
  color: var(--muted);
}

.strong {
  color: var(--text);
}

.footer {
  display: grid;
  gap: 18px;
}

.is-hidden {
  display: none !important;
}

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

.source-list a {
  color: var(--quandrix);
}

@media (max-width: 1120px) {
  .topbar-inner,
  .dashboard,
  .study-layout,
  .explorer,
  .quiz-layout,
  .card-detail {
    grid-template-columns: 1fr;
  }

  .section-nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .college-grid,
  .core-grid-wrap,
  .mechanics-grid,
  .event-grid,
  .summary-grid,
  .hero-meta,
  .filters,
  .art-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .top-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 760px) {
  .topbar {
    position: static;
  }

  .shell {
    width: min(100% - 20px, 1320px);
    gap: 16px;
    padding: 14px 0 28px;
  }

  .status-grid,
  .top-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    align-items: stretch;
  }

  .college-grid,
  .core-grid-wrap,
  .mechanics-grid,
  .event-grid,
  .summary-grid,
  .hero-meta {
    grid-template-columns: 1fr;
  }

  .topbar-inner {
    width: min(100% - 20px, 1320px);
    gap: 12px;
    padding: 12px 0;
  }

  .brand {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 12px;
  }

  .brand-mark {
    width: 56px;
    min-width: 56px;
  }

  .brand h1,
  .hero-panel h2,
  .module h2,
  .explorer-header h2,
  .quiz-panel h2,
  .reference-panel h2 {
    font-size: 1.7rem;
  }

  .brand p,
  .hero-panel p,
  .module p,
  .reference-panel p,
  .fact-list li,
  .checklist li,
  .core-grid li,
  .source-list li,
  .card-meta,
  .oracle {
    font-size: 0.92rem;
  }

  .pill,
  .nav-chip,
  .ghost-button,
  .action-button,
  .quiz-option {
    min-height: 48px;
  }

  .pill,
  .top-actions .ghost-button,
  .top-actions .action-button {
    width: 100%;
  }

  .nav-shell {
    padding: 14px;
    gap: 12px;
  }

  .section-nav {
    flex-wrap: nowrap;
    display: flex;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    padding-bottom: 4px;
    scrollbar-width: none;
  }

  .section-nav::-webkit-scrollbar {
    display: none;
  }

  .nav-chip {
    min-width: 140px;
    min-height: 64px;
    flex: 0 0 auto;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .hero-actions > * {
    width: 100%;
  }

  .dashboard,
  .module-stack,
  .explorer,
  .quiz-layout,
  .footer {
    gap: 14px;
  }

  .panel,
  .module,
  .quiz-panel,
  .reference-panel {
    padding: 14px;
  }

  .art-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .art-grid .art-tile:first-child {
    grid-column: span 2;
    min-height: 168px;
  }

  .art-tile {
    min-height: 112px;
  }

  .art-caption {
    left: 8px;
    right: 8px;
    bottom: 8px;
    font-size: 0.74rem;
  }

  .check-item {
    align-items: flex-start;
  }

  .check-item input {
    width: 22px;
    height: 22px;
    margin-top: 2px;
  }

  .tag-row {
    gap: 8px;
  }

  .tag {
    font-size: 0.78rem;
  }

  .filters {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .filters input[type="search"] {
    grid-column: 1 / -1;
  }

  .explorer-list {
    padding: 10px;
    max-height: none;
    overflow: visible;
  }

  .card-row {
    grid-template-columns: 54px minmax(0, 1fr);
    gap: 10px;
    padding: 9px;
  }

  .card-thumb {
    width: 54px;
  }

  .card-detail {
    padding: 14px;
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .card-detail-desktop {
    display: none;
  }

  .card-detail-inline {
    display: grid;
    margin-top: -2px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: none;
  }

  .card-detail img {
    max-width: min(260px, 100%);
    margin: 0 auto;
  }

  .peek-card {
    right: 10px;
    left: 10px;
    bottom: 10px;
    width: auto;
    max-height: 72vh;
    padding: 14px;
  }

  .peek-card-body {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 12px;
  }

  .peek-close {
    min-height: 36px;
  }

  .card-detail-body {
    gap: 10px;
  }

  .quiz-feedback {
    min-height: 0;
  }

  .source-list {
    gap: 8px;
  }
}

@media (max-width: 420px) {
  .status-grid,
  .top-actions {
    grid-template-columns: 1fr;
  }

  .brand h1,
  .hero-panel h2,
  .module h2,
  .explorer-header h2,
  .quiz-panel h2,
  .reference-panel h2 {
    font-size: 1.5rem;
  }

  .art-grid,
  .filters {
    grid-template-columns: 1fr;
  }

  .peek-card {
    max-height: 68vh;
  }

  .peek-card-body {
    grid-template-columns: 1fr;
  }

  .peek-card-art img {
    max-width: 148px;
  }

  .art-grid .art-tile:first-child {
    grid-column: auto;
    min-height: 128px;
  }

  .art-tile {
    min-height: 128px;
  }

  .filters input[type="search"] {
    grid-column: auto;
  }
}