/* ═══════════════════════════════════════════════════
   Zifan Xu Portfolio — Black Chrome Editorial
   Core Design System
   ═══════════════════════════════════════════════════ */

/* ── Design Tokens ── */
:root {
  --color-bg: #050505;
  --color-bg-soft: #080809;
  --color-panel: #0b0b0c;
  --color-panel-raised: #121214;
  --color-text: #f3f3f1;
  --color-text-muted: #9a9ba0;
  --color-text-dim: #8e9095;
  --color-line: rgba(255, 255, 255, 0.10);
  --color-line-strong: rgba(255, 255, 255, 0.18);
  --color-silver: #d9dce1;
  --color-white: #ffffff;

  --radius-none: 0;
  --radius-panel: 12px;
  --radius-feature: 20px;
  --radius-pill: 999px;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 64px;
  --space-6: 96px;
  --space-7: 144px;

  --page-max: 1440px;
  --page-gutter: clamp(20px, 4vw, 64px);

  --type-hero: clamp(64px, 11vw, 168px);
  --type-section: clamp(42px, 6vw, 88px);
  --type-project: clamp(32px, 4vw, 64px);
  --type-body: clamp(16px, 1.2vw, 19px);
  --type-label: 11px;

  --font-sans: "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --ease: cubic-bezier(0.19, 1, 0.22, 1);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; background: var(--color-bg); -webkit-font-smoothing: antialiased; }
body {
  margin: 0;
  color: var(--color-text);
  background: var(--color-bg);
  font-family: var(--font-sans);
  line-height: 1.7;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ── Background Grid + Grain ── */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 80px 80px;
}
body::after {
  content: "";
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* ── Typography ── */
h1, h2, h3, h4 { font-weight: 400; line-height: 1.12; }
.section-kicker {
  font-family: var(--font-mono);
  font-size: var(--type-label);
  color: var(--color-text-muted);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}
.section-head h2 {
  font-size: var(--type-section);
  letter-spacing: 0.01em;
  color: var(--color-text);
  max-width: 18ch;
}

/* ── Layout ── */
.page-wrap { position: relative; z-index: 1; }
.container { width: min(var(--page-max), calc(100% - var(--page-gutter) * 2)); margin: 0 auto; }
.section-rule { width: 100%; height: 1px; background: var(--color-line); margin: 0; border: 0; }

/* ── Topbar ── */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px var(--page-gutter);
  font-family: var(--font-mono);
  font-size: 11px; color: var(--color-text-muted);
  letter-spacing: 0.12em; text-transform: uppercase;
  transition: background 0.3s ease, padding 0.3s ease, border-color 0.3s ease;
}
.topbar.scrolled {
  padding: 12px var(--page-gutter);
  background: rgba(5, 5, 5, 0.92);
  border-bottom: 1px solid var(--color-line);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.topbar-brand {
  color: var(--color-text);
  letter-spacing: 0.08em;
  display: flex; align-items: center; gap: 10px;
}
.topbar-brand::before {
  content: ""; display: inline-block;
  width: 8px; height: 2px; background: var(--color-text);
}
.topbar-nav { display: flex; gap: 28px; }
.topbar-nav a {
  color: var(--color-text-muted); transition: color 0.2s ease;
  padding: 6px 0;
}
.topbar-nav a:hover, .topbar-nav a.active { color: var(--color-text); }
.topbar-menu-btn {
  display: none; width: 44px; height: 44px; align-items: center; justify-content: center;
  background: none; border: none; cursor: pointer; padding: 0;
}
.topbar-menu-btn span {
  display: block; width: 20px; height: 1.5px; background: var(--color-text); position: relative;
}
.topbar-menu-btn span::before, .topbar-menu-btn span::after {
  content: ""; display: block; width: 20px; height: 1.5px; background: var(--color-text);
  position: absolute; transition: transform 0.3s ease;
}
.topbar-menu-btn span::before { top: -6px; }
.topbar-menu-btn span::after { top: 6px; }

/* ── Card Navigation ── */
.topbar.card-nav {
  --card-nav-ease: cubic-bezier(0.215, 0.61, 0.355, 1);
  top: 16px;
  left: 50%;
  right: auto;
  width: min(1120px, calc(100% - 32px));
  min-height: 64px;
  padding: 0 8px 0 20px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  color: var(--color-text);
  background: rgba(10, 10, 11, 0.94);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 22px;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.24);
  overflow: hidden;
  overflow: clip;
  transform: translateX(-50%);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transition:
    background-color 0.3s ease,
    border-color 0.3s ease,
    box-shadow 0.45s var(--card-nav-ease);
}
.topbar.card-nav.scrolled {
  padding: 0 8px 0 20px;
  color: var(--color-text);
  background: rgba(8, 8, 9, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: 0 14px 44px rgba(0, 0, 0, 0.32);
}
.topbar.card-nav.is-open {
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.38);
}
.card-nav .topbar-brand {
  min-width: 0;
  min-height: 64px;
  color: var(--color-text);
  font-weight: 700;
  letter-spacing: 0.1em;
}
.card-nav .topbar-brand::before { background: var(--color-text); }
.card-nav .topbar-nav { display: none; }
.card-nav .topbar-menu-btn {
  display: flex;
  grid-column: 2;
  width: 48px;
  height: 44px;
  margin: 10px 8px 10px 0;
  background: var(--color-white);
  border-radius: var(--radius-pill);
  transition: transform 0.25s ease, background-color 0.25s ease;
}
.card-nav .topbar-menu-btn:hover { transform: scale(1.04); }
.card-nav .topbar-menu-btn span,
.card-nav .topbar-menu-btn span::before,
.card-nav .topbar-menu-btn span::after {
  width: 18px;
  background: #111;
  transition:
    top 0.35s var(--card-nav-ease),
    transform 0.35s var(--card-nav-ease),
    background-color 0.2s ease;
}
.card-nav.is-open .topbar-menu-btn span { background: transparent; }
.card-nav.is-open .topbar-menu-btn span::before {
  top: 0;
  transform: rotate(45deg);
}
.card-nav.is-open .topbar-menu-btn span::after {
  top: 0;
  transform: rotate(-45deg);
}
.card-nav-cta {
  grid-column: 3;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 18px;
  color: #111;
  background: var(--color-white);
  border-radius: var(--radius-pill);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  white-space: nowrap;
  transition: transform 0.25s ease, background-color 0.25s ease;
}
.card-nav-cta:hover {
  background: var(--color-silver);
  transform: translateY(-1px);
}
.card-nav-panel {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  max-height: 0;
  padding: 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  overflow: hidden;
  transform: translateY(-14px);
  transition:
    max-height 0.65s var(--card-nav-ease),
    padding 0.65s var(--card-nav-ease),
    opacity 0.28s ease,
    transform 0.65s var(--card-nav-ease),
    visibility 0s linear 0.65s;
}
.card-nav.is-open .card-nav-panel {
  max-height: 300px;
  padding: 0 0 8px;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
  transition:
    max-height 0.65s var(--card-nav-ease),
    padding 0.65s var(--card-nav-ease),
    opacity 0.3s ease 0.08s,
    transform 0.65s var(--card-nav-ease),
    visibility 0s;
}
.card-nav-card {
  min-height: 178px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  color: #fff;
  background: var(--card-bg, #1b1722);
  border-radius: 15px;
  opacity: 0;
  transform: translateY(-18px) scale(0.97);
  transition:
    opacity 0.22s ease,
    transform 0.5s var(--card-nav-ease);
}
.card-nav.is-open .card-nav-card {
  opacity: 1;
  transform: translateY(0) scale(1);
  transition-delay: calc(0.08s + var(--card-index) * 0.055s);
}
.card-nav-card-title {
  font-family: var(--font-sans);
  font-size: clamp(20px, 2vw, 28px);
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}
.card-nav-links {
  display: grid;
  gap: 0;
  margin-top: auto;
}
.card-nav-links a {
  min-height: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: rgba(255, 255, 255, 0.72);
  border-top: 1px solid rgba(255, 255, 255, 0.13);
  font-size: 10px;
  letter-spacing: 0.08em;
  transition: color 0.2s ease, padding-left 0.25s var(--card-nav-ease);
}
.card-nav-links a:hover,
.card-nav-links a.active {
  padding-left: 5px;
  color: #fff;
}
.card-nav-ready .mobile-nav-overlay { display: none !important; }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 46px; padding: 0 28px;
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.10em; text-transform: uppercase;
  border-radius: var(--radius-pill); cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease; border: none;
}
.btn-primary {
  background: var(--color-white); color: #050505;
}
.btn-primary:hover { background: var(--color-silver); }
.btn-ghost {
  background: transparent; color: var(--color-text);
  border: 1px solid var(--color-line);
}
.btn-ghost:hover { border-color: var(--color-line-strong); background: rgba(255,255,255,0.04); }

/* ── Evidence Panels ── */
.evidence-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-3);
}
.evidence-item {
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-panel);
  padding: var(--space-3);
}
.evidence-item .evidence-label {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--color-text-dim); letter-spacing: 0.14em; text-transform: uppercase;
  margin-bottom: var(--space-1);
}
.evidence-item .evidence-value {
  font-size: var(--type-body); color: var(--color-text); line-height: 1.4;
}

/* ── Project Panels (Home) — Editorial ── */

/* Featured project (larger, first) */
.project-featured {
  margin-bottom: var(--space-7);
  border-bottom: 1px solid var(--color-line);
  padding-bottom: var(--space-7);
}
.project-link-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); align-items: center; color: inherit; text-decoration: none; }
.project-featured-media { position: relative; }
.project-featured-media img {
  width: 100%; aspect-ratio: 4/3; object-fit: contain;
  border-radius: var(--radius-feature); border: 1px solid var(--color-line);
}
.project-featured-info { display: flex; flex-direction: column; gap: var(--space-2); }
.project-index {
  font-family: var(--font-mono); font-size: var(--type-label);
  color: var(--color-silver); letter-spacing: 0.18em; text-transform: uppercase;
}
.project-featured-info h3 {
  font-size: var(--type-project); color: var(--color-text);
  letter-spacing: -0.02em; line-height: 1.05;
}
.project-subtitle {
  font-size: clamp(18px, 1.4vw, 24px); color: var(--color-text-muted);
  line-height: 1.4; font-weight: 300;
}
.project-role-line {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--color-text-dim); letter-spacing: 0.08em; text-transform: uppercase;
}
.project-excerpt {
  font-size: var(--type-body); color: var(--color-text-muted); line-height: 1.7;
}

/* Evidence Bento — featured project */
.project-evidence-bento {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2);
  margin-top: var(--space-1);
}
.bento-cell {
  background: var(--color-panel); border: 1px solid var(--color-line);
  border-radius: var(--radius-panel); padding: var(--space-2);
}
.bento-cell span {
  display: block; font-family: var(--font-mono); font-size: 10px;
  color: var(--color-silver); letter-spacing: 0.10em; text-transform: uppercase;
  margin-bottom: 4px;
}
.bento-cell em {
  display: block; font-size: 13px; color: var(--color-text-dim);
  font-style: normal; line-height: 1.5;
}

.project-view-link {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--color-silver); letter-spacing: 0.10em; text-transform: uppercase;
  margin-top: var(--space-1); display: inline-block;
}
.project-link-wrap:hover .project-view-link { color: var(--color-white); }
.project-link-wrap:hover .project-featured-media img { border-color: var(--color-line-strong); }

/* Editorial project panel (projects 2-4) */
.project-panel-editorial {
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--color-line);
}
.project-panel-editorial:last-of-type { border-bottom: none; padding-bottom: 0; }
.panel-ed-link {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4);
  align-items: center; color: inherit; text-decoration: none;
}
.panel-ed-media img {
  width: 100%; aspect-ratio: 16/10; object-fit: contain; background: var(--color-bg);
  border-radius: var(--radius-feature); border: 1px solid var(--color-line);
  transition: border-color 0.3s ease;
}
.panel-ed-link:hover .panel-ed-media img { border-color: var(--color-line-strong); }
.panel-ed-info { display: flex; flex-direction: column; gap: var(--space-1); }
.panel-ed-info h3 {
  font-size: var(--type-project); color: var(--color-text);
  letter-spacing: -0.015em; line-height: 1.1;
}
.panel-ed-info .project-view-link { margin-top: var(--space-1); }
.panel-ed-link:hover .project-view-link { color: var(--color-white); }

/* Reverse layout — media on the right */
.project-panel-editorial.reverse .panel-ed-media { order: 1; }

@media (max-width: 1024px) {
  .project-panel-editorial.reverse .panel-ed-media { order: 0; }
}

.project-evidence-row {
  display: flex; gap: var(--space-3);
  margin: var(--space-1) 0;
}
.project-evidence-row > div {
  flex: 1; background: var(--color-panel); border: 1px solid var(--color-line);
  border-radius: var(--radius-panel); padding: var(--space-2);
}
.project-evidence-row span {
  display: block; font-family: var(--font-mono); font-size: 10px;
  color: var(--color-silver); letter-spacing: 0.10em; text-transform: uppercase;
  margin-bottom: 3px;
}
.project-evidence-row em {
  display: block; font-size: 12px; color: var(--color-text-dim);
  font-style: normal; line-height: 1.5;
}

/* ══ Home project taxonomy ══ */
.section-deck {
  max-width: 58ch;
  margin-top: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-muted);
}
.home-project-groups {
  display: grid;
  gap: clamp(64px, 6vw, 96px);
}
.home-type-group,
.home-course-strip { scroll-margin-top: 120px; }
.anchor-alias {
  display: block;
  height: 0;
  scroll-margin-top: 120px;
}
.home-type-head {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) auto;
  gap: clamp(18px, 2.8vw, 44px);
  align-items: start;
  margin-bottom: 22px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-line);
}
.home-type-index {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: 0.12em;
  color: var(--color-silver);
}
.home-type-label,
.home-type-count,
.home-course-label {
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.5;
  letter-spacing: 0.12em;
  color: var(--color-text-dim);
}
.home-type-copy h3 {
  margin-top: 8px;
  font-size: clamp(30px, 3.6vw, 50px);
  line-height: 1.08;
  letter-spacing: -0.025em;
  color: var(--color-text);
}
.home-type-copy > p:last-child {
  max-width: 56ch;
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-muted);
}
.home-type-count {
  padding-top: 2px;
  white-space: nowrap;
}
.work-card {
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-feature);
  overflow: hidden;
  transition: border-color 0.3s ease;
}
.work-card:hover { border-color: var(--color-line-strong); }
.work-card a { color: inherit; text-decoration: none; height: 100%; display: flex; flex-direction: column; }
.card-media {
  position: relative;
  min-width: 0;
  overflow: hidden;
  background: linear-gradient(145deg, #17181b 0%, #0c0d0f 100%);
}
.card-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}
.work-card:hover .card-media img { transform: scale(1.015); }

/* Each type begins with its most complete case, then continues as an index. */
.work-card--type-lead { margin-bottom: 18px; }
.work-card--type-lead a {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(340px, 0.82fr);
}
.work-card--type-lead .card-media { height: clamp(320px, 31vw, 420px); }
.work-card--type-lead .card-media img { aspect-ratio: auto; }
.work-card--camera .card-media img { object-position: 50% 50%; }
.work-card--wall-station .card-media img { object-position: 50% 46%; }
.work-card--final-warning .card-media img { object-position: 50% 56%; }
.work-card--type-lead .card-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-2);
  padding: clamp(28px, 4vw, 54px);
}
.work-card--type-lead .card-title {
  font-size: clamp(24px, 2.3vw, 34px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--color-text);
}
.card-title-en {
  display: block;
  margin-top: 7px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  line-height: 1.45;
  letter-spacing: 0.08em;
  color: var(--color-text-dim);
}

/* Type-local project index. Order expresses completion without public scores. */
.home-project-list { border-top: 1px solid var(--color-line); }
.home-project-row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1.25fr) minmax(180px, 0.62fr) 28px;
  gap: clamp(18px, 2.5vw, 40px);
  align-items: center;
  min-height: 104px;
  padding: 20px 4px;
  border-bottom: 1px solid var(--color-line);
  transition: padding 0.25s var(--ease), background-color 0.25s ease, border-color 0.25s ease;
}
.home-project-row:hover {
  padding-inline: 16px;
  border-color: var(--color-line-strong);
  background: rgba(255, 255, 255, 0.025);
}
.home-project-row[id] { scroll-margin-top: 120px; }
.home-project-row:focus-visible { outline: 2px solid var(--color-silver); outline-offset: 4px; }
.home-project-order {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--color-silver);
}
.home-project-title {
  font-size: clamp(20px, 2vw, 30px);
  line-height: 1.2;
  color: var(--color-text);
}
.home-project-title small {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: 0.06em;
  color: var(--color-text-dim);
}
.home-project-focus {
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.6;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}
.home-project-arrow {
  justify-self: end;
  font-size: 18px;
  color: var(--color-text-dim);
  transition: color 0.2s ease, transform 0.2s ease;
}
.home-project-row:hover .home-project-arrow { color: var(--color-white); transform: translate(3px, -3px); }
.home-course-strip {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, auto);
  gap: var(--space-4);
  align-items: end;
  margin-top: var(--space-5);
  padding: clamp(24px, 3vw, 40px);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-feature);
  background: linear-gradient(120deg, var(--color-panel) 0%, var(--color-bg-soft) 100%);
  scroll-margin-top: 120px;
}
.home-course-copy h3 { margin-top: 8px; font-size: clamp(24px, 2.6vw, 38px); color: var(--color-text); }
.home-course-copy p { max-width: 52ch; margin-top: 10px; font-size: 13px; line-height: 1.7; color: var(--color-text-muted); }
.home-course-link {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 12px;
  align-items: center;
  min-height: 52px;
  padding: 0 2px;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}
.home-course-link:hover { color: var(--color-white); }
.home-course-link strong { font-size: 18px; font-weight: 400; color: var(--color-text); }

/* Shared card elements */
.card-tier { font-family: var(--font-mono); font-size: 10px; color: var(--color-text-dim); letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: var(--space-1); }
.card-excerpt { font-size: 14px; color: var(--color-text-muted); line-height: 1.6; }
.card-tags { display: flex; flex-wrap: wrap; gap: var(--space-1); margin-top: auto; padding-top: var(--space-2); }
.card-tag { font-family: var(--font-mono); font-size: 10px; color: var(--color-text-dim); letter-spacing: 0.06em; padding: 4px 10px; border: 1px solid var(--color-line); border-radius: var(--radius-pill); }
.card-cta { font-family: var(--font-mono); font-size: 11px; color: var(--color-silver); letter-spacing: 0.08em; text-transform: uppercase; margin-top: var(--space-1); display: inline-block; }
.work-card:hover .card-cta { color: var(--color-white); }
.disclosure-badge { display: inline-block; font-family: var(--font-mono); font-size: 9px; color: var(--color-text-dim); letter-spacing: 0.08em; padding: 3px 8px; border: 1px solid var(--color-line); border-radius: var(--radius-pill); margin-top: var(--space-1); }

/* Old project panel kept for backward compat */
.project-panel { display: none; }

@media (max-width: 900px) {
  .home-type-head { grid-template-columns: 44px minmax(0, 1fr); }
  .home-type-count { grid-column: 2; }
  .work-card--type-lead a { grid-template-columns: 1fr; }
  .work-card--type-lead .card-media { height: auto; min-height: 0; aspect-ratio: 16 / 9; }
  .home-project-row { grid-template-columns: 64px minmax(0, 1fr) 28px; row-gap: 5px; }
  .home-project-focus { grid-column: 2; }
  .home-project-arrow { grid-column: 3; grid-row: 1 / span 2; }
  .home-course-strip { grid-template-columns: 1fr; align-items: start; }
}
@media (max-width: 720px) {
  .home-project-groups { gap: 72px; }
  .home-type-head {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 14px;
    margin-bottom: 18px;
    padding-bottom: 20px;
  }
  .home-type-copy h3 { font-size: 30px; }
  .home-type-count { grid-column: 2; }
  .work-card--type-lead .card-body { padding: 24px 20px; }
  .work-card--type-lead .card-title { font-size: 26px; }
  .home-project-row {
    grid-template-columns: 28px minmax(0, 1fr) auto;
    gap: 6px 14px;
    min-height: 0;
    padding: 20px 0;
  }
  .home-project-row:hover { padding-inline: 10px; }
  .home-project-order { grid-column: 1; grid-row: 1 / span 2; align-self: start; padding-top: 5px; }
  .home-project-title,
  .home-project-focus { grid-column: 2; }
  .home-project-arrow { grid-column: 3; grid-row: 1 / span 2; align-self: center; }
  .home-project-title { font-size: 21px; }
  .home-course-strip { padding: 24px 20px; }
  .home-course-link { font-size: 10px; }
}

/* ── Hero ── */
.hero {
  min-height: min(820px, 88svh); display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 300px);
  gap: clamp(36px, 5vw, 76px);
  align-items: center; padding: 120px var(--page-gutter) 72px; position: relative;
}
.hero-matrix { grid-column: 1; position: relative; }
.hero-matrix svg { display: none; }
.hero-wordmark {
  margin: 0; display: grid; gap: clamp(8px, 1.2vw, 22px);
  width: min-content; color: transparent;
  font-family: "Arial Black", "Helvetica Neue", Arial, sans-serif;
  font-size: clamp(112px, 21vw, 300px); font-weight: 900;
  line-height: 0.90; letter-spacing: -0.025em; text-transform: uppercase;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='6' height='6' viewBox='0 0 6 6'%3E%3Ccircle cx='3' cy='3' r='1.15' fill='%23aeb1b7' fill-opacity='.62'/%3E%3C/svg%3E");
  background-size: 6px 6px;
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-stroke: 0.4px rgba(255,255,255,0.05);
  text-shadow: 0 0 22px rgba(217,220,225,0.10);
  position: relative;
}
.hero-wordmark span { display: block; white-space: nowrap; background: inherit; -webkit-background-clip: text; background-clip: text; }
#hero-canvas { position: absolute; top: 0; left: 0; z-index: 2; pointer-events: none; }
.hero-wordmark.js-active > span { visibility: hidden; }
.hero-wordmark.js-active { background-image: none; -webkit-background-clip: border-box; background-clip: border-box; -webkit-text-stroke: 0; text-shadow: none; }
.hero-info { grid-column: 2; text-align: left; align-self: center; padding-bottom: 4px; }
.hero-info .cn-name { font-size: clamp(13px, 1.5vw, 17px); color: var(--color-silver); letter-spacing: 0.10em; margin-bottom: 8px; }
.hero-info .tagline { max-width: 28ch; font-size: 12px; color: var(--color-text-muted); letter-spacing: 0.04em; line-height: 1.75; }
.hero-info .rule { width: 40px; height: 1px; background: var(--color-line); margin-bottom: 12px; }
.hero-iam {
  position: absolute; top: clamp(20px, 4vw, 40px); left: var(--page-gutter);
  font-family: var(--font-mono); font-size: 10px;
  color: var(--color-text-dim); letter-spacing: 0.18em; text-transform: uppercase;
}
.hero-role {
  position: absolute; bottom: 80px; left: var(--page-gutter);
  font-family: var(--font-mono); font-size: 10px;
  color: var(--color-text-muted); letter-spacing: 0.14em; text-transform: uppercase;
}
.hero-stars {
  position: absolute; top: clamp(20px, 4vw, 40px); right: var(--page-gutter);
  display: none; gap: 12px;
}
.star-svg { width: clamp(16px, 2vw, 24px); height: auto; opacity: 0.6; }
.hero-edge {
  position: absolute; bottom: 44px; left: var(--page-gutter); right: var(--page-gutter); z-index: 2;
}
.hero-edge::before {
  content: ""; display: block; height: 1px;
  background: var(--color-line); margin-bottom: 10px;
}
.hero-edge-nav {
  display: flex; justify-content: space-between;
  font-family: var(--font-mono); font-size: 10px;
  color: var(--color-text-muted); letter-spacing: 0.08em;
}
.hero-edge-nav a { color: var(--color-text-muted); transition: color 0.3s ease; }
.hero-edge-nav a:hover { color: var(--color-silver); }
.hero-cta {
  position: static;
  display: flex; gap: var(--space-2);
  margin-top: 28px;
}
.hero-cta .btn { width: 100%; min-width: 0; text-align: center; }

/* ── Capability ── */
.capability-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-3);
}
.capability-item {
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-panel);
  padding: var(--space-4) var(--space-3);
  transition: border-color 0.3s ease;
}
.capability-item:hover { border-color: var(--color-line-strong); }
.capability-num {
  font-family: var(--font-mono); font-size: var(--type-label);
  color: var(--color-text-dim); letter-spacing: 0.16em; margin-bottom: var(--space-2);
}
.capability-item h3 { font-size: 20px; color: var(--color-text); margin-bottom: var(--space-1); }
.capability-item p { font-size: 14px; color: var(--color-text-muted); line-height: 1.6; margin-bottom: var(--space-2); }
.capability-item .evidence-link {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--color-silver); letter-spacing: 0.08em; text-transform: uppercase;
}

/* ── About ── */
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); align-items: start;
}
.about-text p {
  font-size: var(--type-body); color: var(--color-text-muted);
  line-height: 1.75; margin-bottom: var(--space-3);
}
.about-meta {
  display: grid; gap: var(--space-3);
}
.meta-row {
  padding: var(--space-2) 0; border-bottom: 1px solid var(--color-line);
}
.meta-label {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--color-text-dim); letter-spacing: 0.14em; text-transform: uppercase;
  display: block; margin-bottom: 4px;
}
.meta-value { font-size: 14px; color: var(--color-text); }

/* ── Contact ── */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); align-items: center;
}
.contact-actions { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.contact-email {
  font-family: var(--font-mono); font-size: 14px; color: var(--color-text);
  letter-spacing: 0.04em;
}

/* ── Footer ── */
.site-footer {
  padding: var(--space-4) var(--page-gutter);
  border-top: 1px solid var(--color-line);
  display: flex; justify-content: space-between;
  font-family: var(--font-mono); font-size: 10px;
  color: var(--color-text-dim); letter-spacing: 0.08em;
}

/* ── Reveal: always visible by default (fail-open) ── */
.reveal { opacity: 1; transform: none; }
/* Motion library handles the reveal animation as enhancement only */
.reveal.in-view { /* marker only, no visual change */ }

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important; animation-iteration-count: 1 !important;
    scroll-behavior: auto !important; transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .project-panel { grid-template-columns: 1fr; gap: var(--space-4); }
  .project-panel.reverse .project-media { order: 0; }
  .project-link-wrap, .panel-ed-link { grid-template-columns: 1fr; gap: var(--space-3); }
  .project-evidence-bento { grid-template-columns: 1fr; }
  .project-evidence-row { flex-direction: column; }
  .capability-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .topbar-nav { display: none; }
  .topbar-menu-btn { display: flex; }
  /* No-JS fallback: show nav links, hide broken menu button */
  .no-js .topbar-nav { display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: var(--color-bg); border-bottom: 1px solid var(--color-line); padding: var(--space-2) var(--page-gutter); gap: var(--space-1); z-index: 101; }
  .no-js .topbar-menu-btn { display: none; }
  .hero { min-height: auto; display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-3); padding: 100px 6vw 48px; }
  .hero-matrix { width: 100%; max-width: 100%; }
  .hero-wordmark { font-size: clamp(100px, 22vw, 190px); background-size: 7px 7px; }
  .hero-info { width: 100%; text-align: left; align-self: auto; }
  .hero-info .rule { margin-left: 0; }
  .hero-cta { position: static; transform: none; display: flex; gap: var(--space-2); flex-wrap: wrap; margin-top: var(--space-2); width: 100%; }
  .hero-cta .btn { flex: 1; min-width: 140px; text-align: center; }
  .hero-edge { position: static; width: 100%; margin-top: var(--space-3); }
  .hero-edge::before { width: 100%; }
  .hero-edge-nav { flex-direction: column; gap: var(--space-1); }
  .hero-iam, .hero-stars { display: none; }
  .hero-role { position: static; width: 100%; }
}

@media (max-width: 720px) {
  :root { --page-gutter: clamp(16px, 4vw, 24px); }
  .capability-grid { grid-template-columns: 1fr; }
  .site-footer { flex-direction: column; gap: var(--space-1); }
  .evidence-grid { grid-template-columns: 1fr; }
  .topbar.card-nav,
  .topbar.card-nav.scrolled {
    top: 10px;
    width: calc(100% - 20px);
    padding: 0 8px 0 14px;
    border-radius: 18px;
  }
  .card-nav .topbar-brand {
    min-height: 58px;
    font-size: 10px;
  }
  .card-nav .topbar-menu-btn {
    grid-column: 3;
    width: 44px;
    height: 40px;
    margin: 9px 0;
  }
  .card-nav-cta { display: none; }
  .card-nav-panel {
    grid-template-columns: 1fr;
    overflow-y: auto;
    overscroll-behavior: contain;
  }
  .card-nav.is-open .card-nav-panel {
    max-height: calc(100svh - 88px);
  }
  .card-nav-card {
    min-height: 132px;
    padding: 16px;
  }
  .card-nav-card-title { font-size: 21px; }
}

@media (max-width: 500px) {
  .hero { padding: 90px 5vw 64px; }
  .hero-wordmark { font-size: clamp(64px, 24vw, 120px); gap: 6px; background-size: 6px 6px; }
  .hero-edge-nav { flex-direction: column; gap: 8px; }
}

/* ── Mobile nav overlay ── */
.mobile-nav-overlay {
  display: none; position: fixed; inset: 0; z-index: 99;
  background: rgba(5, 5, 5, 0.97); backdrop-filter: blur(20px);
  flex-direction: column; align-items: center; justify-content: center; gap: var(--space-4);
}
.mobile-nav-overlay.open { display: flex; }
.mobile-nav-overlay a {
  font-family: var(--font-mono); font-size: 18px;
  color: var(--color-text); letter-spacing: 0.12em; text-transform: uppercase;
}

/* ── Project Page Shared ── */
.project-hero { padding: 120px var(--page-gutter) var(--space-5); }
.project-hero-inner {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); align-items: center;
}
.project-hero-meta {
  font-family: var(--font-mono); font-size: var(--type-label);
  color: var(--color-text-muted); letter-spacing: 0.12em; margin-bottom: var(--space-2);
}
.project-hero h1 { font-size: var(--type-project); color: var(--color-text); margin-bottom: var(--space-2); }
.project-hero-desc { font-size: var(--type-body); color: var(--color-text-muted); line-height: 1.65; }
.project-hero-img img { width: 100%; border-radius: var(--radius-feature); border: 1px solid var(--color-line); }
.full-img { width: 100%; border-radius: var(--radius-feature); border: 1px solid var(--color-line); margin: var(--space-4) 0; }
.project-section h3 { margin: var(--space-4) 0 var(--space-2); font-size: 20px; color: var(--color-text); }
.project-media-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-3); margin: var(--space-4) 0; }
.project-media-grid--three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.project-media-grid img { width: 100%; height: auto; object-fit: contain; border-radius: var(--radius-panel); border: 1px solid var(--color-line); }
.project-media-grid--portrait img { object-fit: contain; background: var(--color-panel); }
.project-figure { margin: var(--space-4) 0; }
.project-figure > .full-img { margin: 0 0 var(--space-1); }
.project-figure figcaption { margin-top: var(--space-1); font-family: var(--font-mono); font-size: 10px; line-height: 1.6; color: var(--color-text-dim); letter-spacing: 0.06em; }

@media (max-width: 720px) {
  .project-media-grid, .project-media-grid--three { grid-template-columns: 1fr; }
}

.project-section { padding: var(--space-6) var(--page-gutter); }
.project-section > .container { max-width: 880px; }
.project-section h2 { font-size: var(--type-section); color: var(--color-text); margin-bottom: var(--space-4); }
.project-section p { font-size: var(--type-body); color: var(--color-text-muted); line-height: 1.75; margin-bottom: var(--space-3); }

.project-nav {
  display: flex; justify-content: space-between; align-items: center;
  padding: var(--space-4) var(--page-gutter); border-top: 1px solid var(--color-line);
}
.project-nav a {
  font-family: var(--font-mono); font-size: 12px;
  color: var(--color-text-muted); letter-spacing: 0.08em;
  transition: color 0.2s ease;
}
.project-nav a:hover { color: var(--color-text); }

/* ── Focus & Keyboard ── */
:focus-visible {
  outline: 2px solid var(--color-silver);
  outline-offset: 3px;
}
:focus:not(:focus-visible) { outline: none; }

a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--color-silver);
  outline-offset: 3px;
}

/* ── Skip link ── */
.skip-link {
  position: absolute; top: -100px; left: 0; background: var(--color-white); color: #000;
  padding: 8px 16px; z-index: 200; font-size: 14px;
}
.skip-link:focus { top: 0; }

/* ── Star SVG ── */
.star-svg svg { display: block; }