/* ============================================================
   CompliantWBC project page
   Visual design adapted from the Psi-Zero project page
   (https://psi-lab.ai/Psi0/) — Catppuccin Latte palette,
   warm cream background, serif headings, monospace UI labels.
   ============================================================ */

:root {
  /* Catppuccin Latte palette */
  --text: #0c3168;
  --subtext1: #5c5f77;
  --subtext0: #6c6f85;
  --overlay2: #7c7f93;
  --overlay1: #8c8fa1;
  --overlay0: #9ca0b0;
  --surface1: #bcc0cc;
  --base: #eff1f5;

  --page-bg: #ffffff;
  --card-bg: #f5fbffa6;
  --card-bg-solid: #fffcf7;
  --accent: #0e2d55;          /* warm brown — links / highlights */
  --ink: #1f1d1a;             /* dark button background */
  --ink-text: #f6f0e7;

  --radius-s: 10px;
  --radius-m: 14px;
  --radius-l: 18px;

  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua",
    Palatino, "Nimbus Roman No9 L", "Times New Roman", serif;
  --mono: "IBM Plex Mono", "Space Mono", "Courier New", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

html, body {
  margin: 0;
  padding: 0;
  color: var(--text);
  background: var(--page-bg);
  font-family: var(--serif);
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ---------- Brand / logo ---------- */

.brand {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin: clamp(8px, 2vw, 20px) 0;
}

.brand-logo {
  font-family: "JetBrains Mono", var(--mono);
  font-weight: 350;
  font-size: clamp(50px, 9vw, 120px);
  letter-spacing: -0.02em;
  line-height: 1;
}

.brand-compliant { color: #5aa9e6; }
.brand-wbc { color: #000000; }

/* ---------- Layout shell ---------- */

.page {
  padding: 28px 6vw 72px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
}

.content { display: flex; flex-direction: column; gap: 16px; }
.content-inner { max-width: 1080px; margin: 0 auto; width: 100%; }

/* ---------- Sticky table of contents ---------- */

.page-toc { display: none; }

.page-toc-label {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--overlay1);
}

.page-toc-links { display: grid; gap: 6px; }

.page-toc-links a {
  width: fit-content;
  padding-left: 12px;
  border-left: 1px solid rgba(76, 79, 105, 0.12);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--overlay1);
  transition: color 0.16s ease, border-color 0.16s ease;
}

.page-toc-links a[aria-current="true"] {
  color: var(--text);
  border-left-color: #4c4f6957;
}

/* ---------- Hero ---------- */

.hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  align-items: center;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.3em;
  font-size: 12px;
  color: var(--overlay1);
  text-align: center;
  margin: 0;
}

.hero-copy h1 {
  font-family: var(--serif);
  font-size: clamp(30px, 4.4vw, 54px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin: 10px 0 12px;
  text-align: center;
}

.hero-venue {
  margin: 0 0 15px;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--text);
  text-align: center;
}

.authors-inline {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  justify-content: center;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--subtext0);
  text-align: center;
}

.authors-inline span:not(:last-child)::after {
  content: ",";
  margin-right: 0.4ch;
}

.author-note {
  margin: 6px 0 0;
  font-size: 11px;
  color: var(--overlay1);
  font-family: var(--mono);
  text-align: center;
}

.affiliations {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 14px;
  font-size: 12px;
  color: var(--subtext0);
  font-family: var(--mono);
  text-align: center;
}

.hero-actions { display: grid; gap: 8px; margin: 14px 0 6px; }

.cta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 0;
}

.cta {
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid rgba(188, 192, 204, 0.7);
  background: #eff1f5bf;
  font-family: var(--mono);
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.14s ease, box-shadow 0.14s ease;
}

.cta:hover { transform: translateY(-1px); box-shadow: 0 8px 20px #4c4f6914; }

.cta.primary { background: var(--ink); color: var(--ink-text); border-color: var(--ink); }
.cta-secondary { background: #f7fdffb8; border-color: #4c4f691f; color: var(--text); }

.hero-media { display: flex; justify-content: center; width: 100%; }

.video-frame {
  width: 100%;
  max-width: 1080px;
  border-radius: 4px;
  background: #ffffff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 24px 60px #3a30231a;
}

.video-frame img, .video-frame video {
  width: 100%;
  display: block;
}

.figure-caption {
  margin: 10px 2px 0;
  font-size: 13px;
  line-height: 1.45;
  color: var(--overlay1);
  font-family: var(--mono);
  text-align: center;
}

/* ---------- Section scaffolding ---------- */

.section {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 30px;
  padding-top: 24px;
  scroll-margin-top: 24px;
}

.section::before {
  content: "";
  display: block;
  width: min(180px, 100%);
  height: 1px;
  background: linear-gradient(90deg, #4c4f692e, #4c4f690a);
}

.section-head { display: flex; flex-direction: column; gap: 6px; }

.section-head h2 {
  font-family: var(--serif);
  font-size: clamp(30px, 4.4vw, 46px);
  font-weight: 600;
  line-height: 1.1;
  margin: 0;
  letter-spacing: -0.02em;
}

.kicker {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  font-size: 11px;
  color: var(--overlay1);
  font-family: var(--mono);
}

/* ---------- Abstract ---------- */

.abstract-card {
  margin-top: 22px;
  border-radius: var(--radius-l);
  border: 1px solid rgba(76, 79, 105, 0.08);
  background: var(--card-bg);
  padding: 24px;
  display: grid;
  gap: 10px;
  scroll-margin-top: 24px;
}

.abstract-card p {
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
}

/* ---------- Contribution cards ---------- */

.contrib-grid {
  margin-top: 4px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.contrib {
  padding: 20px;
  border-radius: var(--radius-l);
  border: 1px solid rgba(76, 79, 105, 0.1);
  background: var(--card-bg);
  display: grid;
  gap: 10px;
  align-content: start;
}

.contrib .badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid rgba(76, 79, 105, 0.14);
  background: var(--card-bg-solid);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--overlay2);
  width: fit-content;
}

.contrib h4 {
  margin: 0;
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 600;
  line-height: 1.16;
  letter-spacing: -0.015em;
}

.contrib p { margin: 0; font-size: 15px; line-height: 1.5; color: var(--subtext0); }

/* ---------- Method blocks ---------- */

.method-block {
  margin: 0;
  padding: 22px;
  border-radius: var(--radius-l);
  border: 1px solid rgba(76, 79, 105, 0.08);
  background: var(--card-bg);
  display: grid;
  gap: 12px;
}

.method-block h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.method-block h4 {
  margin: 6px 0 0;
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.2;
}

.method-block p { margin: 0; font-size: 16px; line-height: 1.6; color: var(--text); }
.method-block a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.14em;
}

.method-block figure { margin: 6px 0 0; display: grid; gap: 8px; }

.method-block figure img {
  width: 100%;
  border-radius: var(--radius-s);
  background: #fff;
  border: 1px solid rgba(76, 79, 105, 0.08);
}

.method-block figcaption {
  font-size: 14px;
  line-height: 1.45;
  color: var(--subtext0);
}

/* split layout: text beside an image */
.method-split {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 18px;
  align-items: center;
}

.method-split .method-split-text { display: grid; gap: 10px; }
.method-split img,
.method-split video {
  width: 100%;
  border-radius: var(--radius-s);
  border: 1px solid rgba(76, 79, 105, 0.08);
  background: #fff;
}

/* ---------- Staged training steps ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.step {
  padding: 20px;
  border-radius: var(--radius-l);
  border: 1px solid var(--step-accent, rgba(76, 79, 105, 0.12));
  background: var(--step-tint, var(--card-bg));
  display: grid;
  gap: 12px;
  align-content: start;
}

.step--1 {
  --step-tint: rgba(209, 234, 252, 0.911);
  --step-accent: rgba(183, 145, 87, 0.22);
}
.step--2 {
  --step-tint: rgba(201, 232, 253, 0.404);
  --step-accent: rgba(120, 142, 106, 0.22);
}

.step-meta { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 12px; }

.step-meta span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid var(--step-accent);
  background: var(--card-bg-solid);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--overlay2);
}

.step-rule { height: 1px; background: var(--step-accent); }

.step h4 {
  margin: 0;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.step p { margin: 0; line-height: 1.55; color: var(--text); }

/* ---------- Spec / hyperparameter list ---------- */

.spec-list {
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 8px 18px;
}

.spec-list li {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--subtext0);
  border-left: 1px solid rgba(76, 79, 105, 0.14);
  padding-left: 10px;
  line-height: 1.5;
}

.spec-list li b { color: var(--text); font-weight: 600; }

/* ---------- Experiments / tables ---------- */

.results-panel {
  border-radius: var(--radius-l);
  border: 1px solid rgba(76, 79, 105, 0.08);
  background: var(--card-bg);
  padding: 20px;
  display: grid;
  gap: 14px;
}

.results-head { display: grid; gap: 6px; max-width: 820px; }

.results-head h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.results-head p { margin: 0; color: var(--text); line-height: 1.55; }

.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

table.data th, table.data td {
  padding: 9px 10px;
  border-top: 1px solid rgba(76, 79, 105, 0.1);
  text-align: center;
  vertical-align: middle;
}

table.data thead th {
  border-top: none;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--overlay1);
  line-height: 1.3;
}

table.data th:first-child, table.data td:first-child {
  text-align: left;
}

table.data tbody tr:first-child td { border-top: 1px solid rgba(76, 79, 105, 0.14); }

table.data tr.ours td {
  background: rgba(139, 200, 241, 0.12);
  font-weight: 600;
}

table.data .yes { color: var(--accent); font-weight: 600; }
table.data .no { color: var(--overlay0); }

/* numeric results: muted ±std, tight units sub-row */
table.data td { white-space: nowrap; }
table.data td small { font-size: 0.8em; font-weight: 400; color: var(--overlay1); margin-left: 2px; }
table.data tr.subhead th { padding-top: 0; font-size: 10px; color: var(--overlay0); }

.eval-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
}

.eval-card {
  padding: 16px;
  border-radius: var(--radius-m);
  border: 1px solid rgba(76, 79, 105, 0.08);
  background: #ffffff6b;
  display: grid;
  gap: 6px;
}

.eval-card h4 {
  margin: 0;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.18;
}

.eval-card p { margin: 0; font-size: 14px; line-height: 1.5; color: var(--subtext0); }

.eval-card video {
  width: 100%;
  margin-bottom: 4px;
  border-radius: var(--radius-s);
  border: 1px solid rgba(76, 79, 105, 0.08);
  background: #000;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* portrait-shot clips letterbox inside the same box instead of cropping */
.eval-card video.portrait { object-fit: contain; }

/* ---------- Qualitative results: side-by-side video demos ---------- */

.qual-block { display: grid; gap: 6px; }
.qual-block + .qual-block { margin-top: 8px; }

.qual-title {
  margin: 0;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.18;
}

.qual-desc { margin: 0 0 6px; font-size: 14px; line-height: 1.5; color: var(--subtext0); }

.qual-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.qual-compare figure,
.qual-multisite figure { margin: 0; display: grid; gap: 6px; }

.qual-compare video {
  width: 100%;
  display: block;
  border-radius: var(--radius-s);
  border: 1px solid rgba(76, 79, 105, 0.08);
  background: #ffffff;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* three center-cropped vertical strips; 3-across ≈ 2:3 overall block */
.qual-multisite {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  /* max-width: 480px; */
  margin: 0 auto;
}

.qual-multisite video {
  width: 100%;
  display: block;
  border-radius: var(--radius-s);
  border: 1px solid rgba(252, 249, 249, 0.08);
  background: #ffffff;
  aspect-ratio: 2 / 3;
  object-fit: cover;
}

.qual-compare figcaption,
.qual-multisite figcaption {
  font-family: var(--mono);
  font-size: 12px;
  text-align: center;
  color: var(--overlay1);
}

/* ---------- Hardware gallery: thumbnail strip + main stage ---------- */

.hw-gallery { display: grid; gap: 14px; }

.hw-thumbs {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.hw-thumb {
  padding: 0;
  overflow: hidden;
  border: 1px solid rgb(255, 255, 255);
  border-radius: var(--radius-s);
  background: #ffffff;
  cursor: pointer;
  font-family: inherit;
  text-align: center;
  display: grid;
  align-content: start;
  transition: border-color 0.16s ease, transform 0.14s ease, box-shadow 0.14s ease;
}

.hw-thumb:hover { transform: translateY(-1px); box-shadow: 0 8px 18px #1766c0fb; }

.hw-thumb video {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #ffffff;
  display: block;
  pointer-events: none;
}

.hw-thumb-label {
  display: block;
  padding: 7px 6px;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.3;
  color: var(--subtext0);
}

.hw-thumb.is-active {
  border-color: rgba(166, 202, 250, 0.945);
  box-shadow: 0 0 0 1px var(--accent);
}

.hw-thumb.is-active .hw-thumb-label { color: var(--text); font-weight: 600; }

.hw-stage { display: grid; gap: 12px; }

.hw-stage-video {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #ffffff;
  border-radius: var(--radius-m);
  border: 1px solid rgba(255, 255, 255, 0.945);
  overflow: hidden;
}

.hw-stage-video video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.hw-stage-info { display: grid; gap: 6px; max-width: 820px; }

.hw-stage-info h4 {
  margin: 0;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.18;
}

.hw-stage-info p { margin: 0; font-size: 15px; line-height: 1.55; color: var(--subtext0); }

@media (max-width: 640px) {
  .hw-thumbs { grid-template-columns: repeat(auto-fit, minmax(96px, 1fr)); }
}

.note {
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--overlay1);
  font-family: var(--mono);
}

/* ---------- BibTeX ---------- */

.bibtex-panel {
  border-radius: var(--radius-l);
  border: 1px solid rgba(76, 79, 105, 0.08);
  background: var(--card-bg);
  padding: 20px;
  display: grid;
  gap: 12px;
}

.bibtex-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.copy-btn {
  border: 1px solid rgba(76, 79, 105, 0.18);
  background: var(--card-bg-solid);
  color: var(--text);
  border-radius: 999px;
  padding: 7px 16px;
  font-family: var(--mono);
  font-size: 12px;
  cursor: pointer;
  transition: background 0.15s ease;
}

.copy-btn:hover { background: #f1ebe1; }

pre.bibtex {
  margin: 0;
  padding: 16px;
  border-radius: var(--radius-s);
  background: #ffffff;
  border: 1px solid rgba(76, 79, 105, 0.1);
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--subtext1);
}

/* ---------- Footer ---------- */

.site-footer {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid rgba(76, 79, 105, 0.08);
  display: grid;
  gap: 8px;
  justify-items: center;
  text-align: center;
}

.site-footer p {
  margin: 0;
  font-size: 12px;
  line-height: 1.5;
  color: var(--overlay1);
  font-family: var(--mono);
}

.site-footer a {
  font-size: 12px;
  color: var(--subtext0);
  font-family: var(--mono);
  border-bottom: 1px solid rgba(76, 79, 105, 0.18);
}

/* ---------- Responsive ---------- */

@media (min-width: 1400px) {
  .page { max-width: 1220px; padding-left: 170px; }
  .page-toc {
    display: block;
    position: fixed;
    left: max(20px, calc((100vw - 1220px) / 2));
    top: 50vh;
    transform: translateY(-50%);
    width: 120px;
    z-index: 3;
  }
  .page-toc-inner { display: grid; gap: 12px; }
}

@media (max-width: 820px) {
  .contrib-grid, .steps, .method-split { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .page { padding-inline: 18px; }
  table.data { width: max-content; min-width: 100%; }
}