:root {
  color-scheme: light;
  --paper: #f4f0e7;
  --paper-deep: #e8e1d3;
  --white: #fffdf8;
  --ink: #18211e;
  --muted: #68716d;
  --line: rgba(24, 33, 30, 0.16);
  --line-strong: rgba(24, 33, 30, 0.36);
  --green: #0a7558;
  --blue: #3859a6;
  --amber: #bd7620;
  --red: #b64d42;
  --shadow: 0 28px 80px rgba(30, 38, 34, 0.12);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 84% 6%, rgba(10, 117, 88, 0.12), transparent 33rem),
    radial-gradient(circle at 8% 38%, rgba(56, 89, 166, 0.07), transparent 28rem),
    var(--paper);
  color: var(--ink);
}

button,
select {
  font: inherit;
}

button,
select,
summary {
  cursor: pointer;
}

button:focus-visible,
select:focus-visible,
summary:focus-visible,
video:focus-visible {
  outline: 3px solid rgba(56, 89, 166, 0.34);
  outline-offset: 3px;
}

.page-shell {
  width: min(1760px, 100%);
  margin: 0 auto;
  padding: 0 44px 38px;
}

.site-header {
  padding-top: 22px;
  border-bottom: 1px solid var(--line-strong);
}

.topbar {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.brand-mark,
.loading-mark {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  font-family: Georgia, serif;
  font-size: 18px;
  font-style: italic;
  font-weight: 700;
}

.archive-status {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--muted);
  font-size: 12px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 5px rgba(189, 118, 32, 0.1);
}

.status-dot.ready {
  background: var(--green);
  box-shadow: 0 0 0 5px rgba(10, 117, 88, 0.1);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(360px, 0.75fr);
  gap: 88px;
  align-items: end;
  padding: 70px 5% 58px;
}

.eyebrow,
.section-index {
  display: block;
  margin: 0 0 12px;
  color: var(--green);
  font-size: 11px;
  font-weight: 820;
  letter-spacing: 0.16em;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(56px, 6.1vw, 104px);
  font-weight: 400;
  letter-spacing: -0.058em;
  line-height: 0.88;
}

h1 em {
  color: var(--green);
  font-weight: 400;
}

.hero-copy {
  padding-left: 30px;
  border-left: 1px solid var(--line-strong);
}

.hero-copy > p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.hero-stats span {
  color: var(--muted);
  font-size: 10px;
  line-height: 1.35;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero-stats strong {
  display: block;
  margin-bottom: 3px;
  color: var(--ink);
  font-family: Georgia, serif;
  font-size: 25px;
  font-weight: 400;
  letter-spacing: -0.03em;
}

main > section {
  padding: 58px 5%;
  border-bottom: 1px solid var(--line-strong);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 30px;
}

.section-heading h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(31px, 3vw, 48px);
  font-weight: 400;
  letter-spacing: -0.04em;
  line-height: 1;
}

.sample-position {
  color: var(--muted);
  font-family: Georgia, serif;
  font-size: 25px;
}

.sample-controls {
  display: grid;
  grid-template-columns: minmax(150px, 0.55fr) minmax(330px, 1.55fr) minmax(130px, 0.45fr) auto;
  gap: 16px;
  align-items: end;
}

.select-field {
  display: grid;
  gap: 8px;
}

.select-field > span {
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

select {
  width: 100%;
  min-height: 46px;
  padding: 0 38px 0 13px;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  background: var(--white);
  color: var(--ink);
}

.sample-actions,
.sync-actions,
.utility-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.quiet-button,
.primary-button {
  min-height: 42px;
  padding: 0 15px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink);
  font-size: 12px;
  font-weight: 720;
}

.quiet-button:hover {
  background: var(--white);
}

.primary-button {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--white);
}

.primary-button:hover {
  background: var(--green);
  border-color: var(--green);
}

.sample-summary {
  margin-top: 28px;
  padding: 24px 26px;
  border-left: 4px solid var(--green);
  background: rgba(255, 253, 248, 0.66);
}

.tag {
  display: inline-flex;
  margin: 0 6px 9px 0;
  padding: 5px 8px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 10px;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sample-summary h3 {
  margin: 2px 0 5px;
  font-family: Georgia, serif;
  font-size: 26px;
  font-weight: 400;
}

.raw-name {
  margin: 0;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  overflow-wrap: anywhere;
}

.compare-section {
  background: rgba(255, 253, 248, 0.38);
}

.compare-heading {
  margin-bottom: 24px;
}

.view-switcher {
  display: inline-grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line-strong);
}

.view-switcher button {
  min-width: 122px;
  min-height: 42px;
  padding: 0 15px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  font-weight: 760;
}

.view-switcher button + button {
  border-left: 1px solid var(--line);
}

.view-switcher button.active {
  background: var(--ink);
  color: var(--white);
}

.compare-toolbar {
  min-height: 64px;
  display: grid;
  grid-template-columns: auto minmax(220px, 1fr) auto;
  gap: 24px;
  align-items: center;
  margin-bottom: 18px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.view-description {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
  text-align: center;
}

.utility-actions {
  justify-content: flex-end;
}

.step-navigator {
  margin-bottom: 20px;
  padding: 17px 18px 19px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 253, 248, 0.78);
}

.step-navigator[hidden] {
  display: none;
}

.step-heading,
.step-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.step-heading {
  justify-content: space-between;
  margin-bottom: 14px;
}

.step-readout {
  min-width: 210px;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 2px 12px;
  padding: 0 10px;
}

.step-readout > span {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 9px;
  font-weight: 820;
  letter-spacing: 0.13em;
}

.step-readout strong {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 24px;
  font-weight: 400;
  letter-spacing: -0.025em;
}

.step-readout small {
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10px;
}

.step-slider {
  width: 100%;
  margin: 0 0 11px;
  accent-color: var(--green);
}

.step-strip {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(34px, 1fr);
  gap: 3px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
}

.step-strip button {
  min-height: 34px;
  padding: 0 4px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 9px;
}

.step-strip button:hover {
  border-color: var(--line-strong);
  background: var(--paper);
  color: var(--ink);
}

.step-strip button.active {
  border-color: var(--green);
  background: var(--green);
  color: var(--white);
}

.quiet-button:disabled {
  cursor: not-allowed;
  opacity: 0.34;
}

#play-path.active {
  border-color: var(--red);
  background: var(--red);
}

.compare-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.compare-panel {
  min-width: 0;
  border: 1px solid var(--line-strong);
  background: var(--white);
  box-shadow: 0 14px 45px rgba(32, 40, 36, 0.08);
}

.side-left {
  border-top: 4px solid var(--blue);
}

.side-right {
  border-top: 4px solid var(--green);
}

.panel-header {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  align-items: end;
  padding: 18px;
  border-bottom: 1px solid var(--line);
}

.side-badge {
  align-self: center;
  color: var(--muted);
  font-size: 10px;
  font-weight: 850;
  letter-spacing: 0.14em;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

.panel-selects {
  display: grid;
  grid-template-columns: minmax(190px, 1fr) minmax(170px, 0.8fr);
  gap: 12px;
}

.compact-field {
  gap: 5px;
}

.compact-field select {
  min-height: 42px;
  font-size: 12px;
}

.video-frame {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 992 / 928;
  overflow: hidden;
  background: #101311;
}

.compare-section[data-view="step"] .video-frame,
.compare-section[data-view="final"] .video-frame {
  aspect-ratio: 1;
}

.video-frame video {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  background: #101311;
}

.video-loading {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
  background: #101311;
  color: rgba(255, 255, 255, 0.62);
  font-size: 11px;
  font-weight: 760;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: opacity 180ms ease;
}

.video-loading.hidden {
  opacity: 0;
}

.panel-footer {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 13px 18px;
}

.panel-caption {
  min-width: 0;
  display: grid;
  gap: 5px;
}

.panel-caption strong {
  font-size: 13px;
}

.panel-caption span {
  color: var(--muted);
  font-size: 10px;
}

.score-readout {
  min-width: 176px;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  column-gap: 14px;
  padding: 9px 11px;
  border: 1px solid rgba(10, 117, 88, 0.24);
  background: rgba(10, 117, 88, 0.055);
}

.score-readout span,
.score-readout small {
  color: var(--muted);
  font-size: 8px;
  font-weight: 760;
  letter-spacing: 0.08em;
}

.score-readout small {
  align-self: end;
  letter-spacing: 0;
}

.score-readout strong {
  grid-column: 2;
  grid-row: 1 / 3;
  align-self: center;
  color: var(--green);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 25px;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: -0.035em;
}

.trajectory-note {
  max-width: 950px;
  margin: 22px auto 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
  text-align: center;
}

.compact-heading {
  margin-bottom: 20px;
}

.prompt-copy {
  max-width: 1200px;
  margin: 0;
  padding-left: 24px;
  border-left: 1px solid var(--line-strong);
  color: #38423e;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(19px, 1.7vw, 27px);
  line-height: 1.55;
}

.matrix-section {
  padding-top: 0;
}

.matrix-section details > summary {
  min-height: 122px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  list-style: none;
}

.matrix-section details > summary::-webkit-details-marker {
  display: none;
}

.matrix-title {
  display: block;
  font-family: Georgia, serif;
  font-size: clamp(27px, 2.5vw, 41px);
  letter-spacing: -0.035em;
}

.summary-action {
  color: var(--muted);
  font-size: 12px;
  font-weight: 760;
}

details[open] .summary-action {
  font-size: 0;
}

details[open] .summary-action::after {
  content: "Close matrix ↑";
  font-size: 12px;
}

.matrix-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
  padding: 15px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.matrix-toolbar p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.trajectory-matrix {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  padding-bottom: 50px;
}

.matrix-card {
  min-width: 0;
  border: 1px solid var(--line);
  background: var(--white);
}

.matrix-card-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 62px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  font-size: 11px;
}

.matrix-card-label {
  min-width: 0;
  display: grid;
  gap: 4px;
}

.matrix-card-label span {
  color: var(--muted);
}

.matrix-card-label strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.matrix-score {
  display: grid;
  flex: 0 0 auto;
  justify-items: end;
  gap: 1px;
}

.matrix-score span {
  color: var(--muted);
  font-size: 8px;
  font-weight: 760;
  letter-spacing: 0.08em;
}

.matrix-score strong {
  color: var(--green);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 20px;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
}

.matrix-card video {
  width: 100%;
  aspect-ratio: 992 / 928;
  display: block;
  object-fit: contain;
  background: #101311;
}

.trajectory-matrix[data-view="step"] .matrix-card video,
.trajectory-matrix[data-view="final"] .matrix-card video {
  aspect-ratio: 1;
}

.matrix-card-actions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line);
}

.matrix-card-actions button {
  min-height: 38px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 10px;
  font-weight: 760;
}

.matrix-card-actions button + button {
  border-left: 1px solid var(--line);
}

.matrix-card-actions button:hover {
  background: var(--paper);
  color: var(--ink);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 25px 5% 0;
  color: var(--muted);
  font-size: 10px;
  font-weight: 760;
  letter-spacing: 0.1em;
}

.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  background: var(--paper);
  transition: opacity 260ms ease, visibility 260ms ease;
}

.loading-overlay.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-card {
  width: min(340px, calc(100vw - 44px));
  display: grid;
  justify-items: center;
  gap: 14px;
}

.loading-card p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.loading-bar {
  width: 100%;
  height: 2px;
  overflow: hidden;
  background: var(--line);
}

.loading-bar span {
  width: 42%;
  height: 100%;
  display: block;
  background: var(--green);
  animation: loading-slide 1.2s ease-in-out infinite;
}

@keyframes loading-slide {
  from { transform: translateX(-110%); }
  to { transform: translateX(340%); }
}

.toast {
  position: fixed;
  z-index: 90;
  right: 26px;
  bottom: 26px;
  padding: 13px 17px;
  transform: translateY(16px);
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: var(--ink);
  color: var(--white);
  box-shadow: var(--shadow);
  font-size: 12px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease;
}

.toast.visible {
  transform: translateY(0);
  opacity: 1;
}

@media (max-width: 1180px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .hero-copy {
    max-width: 780px;
  }

  .sample-controls {
    grid-template-columns: minmax(150px, 0.6fr) minmax(310px, 1.4fr) minmax(130px, 0.5fr);
  }

  .sample-actions {
    grid-column: 1 / -1;
  }

  .compare-toolbar {
    grid-template-columns: 1fr auto;
  }

  .view-description {
    grid-column: 1 / -1;
    grid-row: 2;
    text-align: left;
  }

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

  .step-strip {
    grid-auto-columns: 38px;
  }
}

@media (max-width: 820px) {
  .page-shell {
    padding: 0 18px 28px;
  }

  .topbar {
    align-items: flex-start;
    padding: 14px 0;
  }

  .archive-status {
    max-width: 150px;
    text-align: right;
  }

  .hero,
  main > section {
    padding-left: 0;
    padding-right: 0;
  }

  .hero {
    padding-top: 52px;
  }

  h1 {
    font-size: clamp(49px, 15vw, 76px);
  }

  .hero-copy {
    padding-left: 20px;
  }

  .section-heading,
  .compare-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .sample-controls,
  .compare-grid,
  .panel-selects,
  .trajectory-matrix {
    grid-template-columns: 1fr;
  }

  .sample-actions {
    grid-column: auto;
  }

  .compare-toolbar {
    grid-template-columns: 1fr;
  }

  .view-description {
    grid-column: auto;
    grid-row: auto;
  }

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

  .view-switcher {
    width: 100%;
  }

  .view-switcher button {
    min-width: 0;
    padding: 0 9px;
  }

  .step-heading,
  .step-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .step-readout {
    width: 100%;
    padding: 8px 0;
  }

  .panel-header {
    grid-template-columns: 1fr;
  }

  .side-badge {
    writing-mode: horizontal-tb;
    transform: none;
  }

  .panel-footer,
  .matrix-toolbar,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .panel-footer span {
    text-align: left;
  }

  .score-readout {
    width: 100%;
  }

  .matrix-section details > summary {
    min-height: 145px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}