:root {
  --bg-base: #faf9f7;
  --bg-rose: #fdf6f4;
  --bg-pearl: #f7f5f2;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-solid: #ffffff;
  --border: rgba(0, 0, 0, 0.06);
  --border-accent: rgba(155, 27, 48, 0.12);
  --text: #1a1a2e;
  --text-secondary: #4a4a5e;
  --text-dim: #7a7a8e;
  --accent: #9B1B30;
  --accent-2: #c0392b;
  --accent-light: #e8424e;
  --accent-soft: rgba(155, 27, 48, 0.06);
  --gold: #c8860a;
  --gold-soft: #f5e6c8;
  --gradient-main: linear-gradient(135deg, #9B1B30 0%, #c0392b 50%, #e8424e 100%);
  --gradient-gold: linear-gradient(135deg, #c8860a, #e6a817);
  --gradient-subtle: linear-gradient(135deg, rgba(155,27,48,0.03), rgba(200,134,10,0.02));
  --glow: 0 0 60px rgba(155, 27, 48, 0.06);
  --shadow-card: 0 2px 20px rgba(0,0,0,0.04), 0 8px 40px rgba(155,27,48,0.03);
  --shadow-hover: 0 12px 48px rgba(155, 27, 48, 0.08), 0 4px 16px rgba(0,0,0,0.04);
  --radius: 16px;
  --radius-sm: 10px;
  --videos-task-gap: 2.7rem;
  --videos-title-to-tasks-gap: 1rem;
  --task-panel-title-size: 1.3rem;
  --task-panel-title-size-mobile: 1.2rem;
  --task-head-bottom-gap: 0.9rem;
  --task-badge-size: 0.78rem;
  --task-badge-size-mobile: 0.75rem;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

html, body {
  margin: 0; padding: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
}

body { position: relative; overflow-x: hidden; }

/* ── Multi-layer Aurora Background ───────────────────────── */

.aurora-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  background:
    linear-gradient(180deg, var(--bg-rose) 0%, var(--bg-base) 30%, var(--bg-pearl) 60%, #f9f6f3 100%);
}

.aurora-layer {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0;
  animation: auroraFade 14s ease-in-out infinite;
}

.aurora-1 {
  width: 50vw; height: 50vw;
  top: -15%; left: -5%;
  background: radial-gradient(circle, rgba(155, 27, 48, 0.06) 0%, transparent 70%);
  animation-delay: 0s;
  animation-duration: 12s;
}

.aurora-2 {
  width: 45vw; height: 45vw;
  top: 40%; right: -10%;
  background: radial-gradient(circle, rgba(200, 134, 10, 0.04) 0%, transparent 70%);
  animation-delay: 4s;
  animation-duration: 16s;
}

.aurora-3 {
  width: 35vw; height: 35vw;
  bottom: 0%; left: 25%;
  background: radial-gradient(circle, rgba(155, 27, 48, 0.04) 0%, transparent 70%);
  animation-delay: 8s;
  animation-duration: 14s;
}

@keyframes auroraFade {
  0%, 100% { opacity: 0.4; transform: scale(1) translate(0, 0); }
  25% { opacity: 0.8; transform: scale(1.1) translate(2%, -2%); }
  50% { opacity: 0.6; transform: scale(1.15) translate(-1%, 3%); }
  75% { opacity: 0.9; transform: scale(1.05) translate(1%, -1%); }
}

/* ── Mesh Canvas ─────────────────────────────────────────── */

#meshCanvas {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.25;
}

/* ── Container ───────────────────────────────────────────── */

.container { width: min(1200px, 90vw); margin: 0 auto; }
.narrow { width: min(860px, 90vw); }

/* ── Navigation ─────────────────────────────────────────── */

.top-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px) saturate(1.6);
  -webkit-backdrop-filter: blur(20px) saturate(1.6);
  background: rgba(250, 249, 247, 0.8);
  border-bottom: 1px solid rgba(155, 27, 48, 0.06);
  transition: all 0.3s;
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 56px;
}

.brand {
  text-decoration: none;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: opacity 0.2s;
}

.brand:hover { opacity: 0.7; }

.brand-icon { width: 22px; height: 22px; display: flex; }
.brand-icon svg { width: 100%; height: 100%; }

.top-nav nav { display: flex; gap: 0.2rem; }

.top-nav nav a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.85rem;
  padding: 0.4rem 0.7rem;
  border-radius: 8px;
  transition: all 0.2s;
}

.top-nav nav a:hover {
  color: var(--accent);
  background: rgba(155, 27, 48, 0.04);
}

/* ── Hero ────────────────────────────────────────────────── */

.hero {
  padding: 7rem 0 5rem;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 90% 70% at 50% -10%, rgba(155, 27, 48, 0.04), transparent 50%),
    radial-gradient(ellipse 50% 50% at 80% 80%, rgba(200, 134, 10, 0.03), transparent);
}

.hero-spotlight {
  position: absolute;
  top: -250px;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 500px;
  background: conic-gradient(from 200deg at 50% 50%,
    rgba(155,27,48,0) 0deg,
    rgba(155,27,48,0.04) 60deg,
    rgba(200,134,10,0.03) 120deg,
    rgba(232,66,78,0.03) 200deg,
    transparent 360deg
  );
  filter: blur(60px);
  animation: spotlightSpin 25s linear infinite;
  pointer-events: none;
}

@keyframes spotlightSpin {
  from { transform: translateX(-50%) rotate(0deg); }
  to { transform: translateX(-50%) rotate(360deg); }
}

.hero-inner { text-align: center; position: relative; z-index: 2; }

.hero-tag {
  display: inline-block;
  margin: 0 0 1.2rem;
  padding: 0.38rem 0.85rem;
  border-radius: 999px;
  border: 1px solid rgba(155, 27, 48, 0.2);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 500;
  background: rgba(155, 27, 48, 0.03);
}

.hero h1 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  letter-spacing: -1.5px;
  font-size: clamp(3rem, 8vw, 5.5rem);
  line-height: 1;
  background: linear-gradient(135deg, #1a1a2e 20%, #9B1B30 55%, #c0392b 80%, #e8424e 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% auto;
  animation: titleShift 6s ease-in-out infinite alternate;
}

@keyframes titleShift {
  0% { background-position: 0% center; }
  100% { background-position: 100% center; }
}

.hero-title {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
}

.weaving-mark {
  width: clamp(48px, 5.5vw, 76px);
  height: clamp(48px, 5.5vw, 76px);
  flex: 0 0 auto;
  filter: drop-shadow(0 4px 12px rgba(155, 27, 48, 0.2)) drop-shadow(0 8px 30px rgba(155,27,48,0.1));
  animation: iconBreath 4s ease-in-out infinite;
}

@keyframes iconBreath {
  0%, 100% { transform: scale(1); filter: drop-shadow(0 4px 12px rgba(155,27,48,0.2)) drop-shadow(0 8px 30px rgba(155,27,48,0.1)); }
  50% { transform: scale(1.04); filter: drop-shadow(0 6px 20px rgba(155,27,48,0.3)) drop-shadow(0 12px 40px rgba(155,27,48,0.15)); }
}

.hero-subtitle {
  margin: 1.4rem auto 0;
  width: min(750px, 95%);
  color: var(--text-secondary);
  font-size: clamp(1.05rem, 2vw, 1.4rem);
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: -0.2px;
  background: linear-gradient(90deg, #1a1a2e, #4a4a5e);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-authors {
  margin: 2rem auto 0;
  width: min(900px, 97%);
  color: var(--text-secondary);
  font-size: clamp(0.88rem, 1.1vw, 1.02rem);
  line-height: 2;
  font-weight: 400;
}

.hero-authors a { color: inherit; text-decoration: none; transition: color 0.2s; }
.hero-authors a:hover { color: var(--accent); }

.hero-authors sup, .hero-affiliation sup, .hero-notes sup {
  font-size: 0.75em;
  color: var(--accent);
}

.hero-affiliation {
  margin: 0.5rem auto 0;
  color: var(--text-dim);
  font-size: clamp(0.88rem, 1vw, 1rem);
}

.hero-notes {
  margin: 0.3rem auto 0;
  color: var(--text-dim);
  font-size: clamp(0.82rem, 0.9vw, 0.92rem);
}

/* ── Link Buttons ────────────────────────────────────────── */

.link-buttons {
  margin-top: 2.2rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.7rem;
}

.link-btn {
  text-decoration: none;
  color: var(--text);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(155, 27, 48, 0.1);
  padding: 0.6rem 1.15rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.88rem;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

.link-btn:hover {
  transform: translateY(-1px) scale(1.02);
  box-shadow: 0 4px 14px rgba(155, 27, 48, 0.1);
  background: rgba(255, 255, 255, 0.95);
}

.link-btn .ai { font-size: 1.05rem; }
.hf-icon { display: inline-block; font-size: 1rem; line-height: 1; }

/* ── Sections ────────────────────────────────────────────── */

.section { padding: 3rem 0 4.5rem; position: relative; }

.section + .section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(500px, 50vw);
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(155, 27, 48, 0.12), transparent);
}

.update-note-section { padding: 0.5rem 0 1.2rem; }

.update-note-card {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(155, 27, 48, 0.08);
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.update-note-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-main);
  opacity: 0.6;
}

.update-note-title {
  margin: 0 0 0.45rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

.update-note-list { margin: 0; padding-left: 1rem; color: var(--text-secondary); }
.update-note-list li { margin: 0.25rem 0; line-height: 1.55; font-size: 0.86rem; }
.update-note-list a { color: var(--accent); text-decoration: none; font-weight: 600; }
.notice-date { color: var(--gold); font-weight: 700; }

/* ── Section Titles ──────────────────────────────────────── */

.section-title {
  margin: 0 0 var(--videos-title-to-tasks-gap);
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  letter-spacing: -0.5px;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: linear-gradient(135deg, #1a1a2e 30%, #9B1B30 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-title::before {
  content: '';
  width: 4px;
  height: 1.1em;
  border-radius: 2px;
  background: var(--gradient-main);
  box-shadow: 0 0 12px rgba(155, 27, 48, 0.25);
  flex-shrink: 0;
}

.section-title-compact { font-size: clamp(1.3rem, 2.2vw, 1.75rem); }
.sub-title { margin: 2rem 0 0.9rem; color: var(--text-secondary); font-size: 1.15rem; }
.task-intro { margin: 0 0 0.78rem; color: var(--text-dim); line-height: 1.55; font-size: 0.87rem; }

/* ── Task Tabs ───────────────────────────────────────────── */

.task-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: var(--videos-title-to-tasks-gap);
  margin-bottom: 1.2rem;
}

.task-tab {
  appearance: none;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.5);
  color: var(--text-secondary);
  padding: 0.48rem 0.95rem;
  border-radius: 999px;
  font-family: inherit;
  font-size: 0.83rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.task-tab:hover {
  color: var(--accent);
  border-color: var(--border-accent);
  background: rgba(155, 27, 48, 0.03);
}

.task-tab.active {
  color: #fff;
  border-color: transparent;
  background: var(--gradient-main);
  box-shadow: 0 4px 16px rgba(155, 27, 48, 0.2), inset 0 1px 0 rgba(255,255,255,0.2);
  text-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

.task-tab:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ── Task Panels ─────────────────────────────────────────── */

.task-panel[data-task] { display: none; }
.task-panel[data-task].active-task { display: block; animation: fadeIn 0.3s ease; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.task-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.compact-panel { padding: 0.8rem; }

.task-panel-head {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 0.45rem;
}
.compact-head { margin-bottom: var(--task-head-bottom-gap); }
.task-panel-head h4 { margin: 0; font-size: var(--task-panel-title-size); color: var(--text); }

.task-badge {
  border: 1px solid var(--border-accent);
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  font-size: var(--task-badge-size);
  padding: 0.16rem 0.5rem;
  font-weight: 600;
}

/* ── Case Grids ──────────────────────────────────────────── */

.compact-case-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.52rem; }
.flf2v-case-grid { grid-template-columns: 1fr; }

.flf2v-row, .t2v-row, .tiv2v-row, .i2v-row {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0.52rem;
}

.flf2v-row { --flf2v-row-input-height: auto; --flf2v-row-image-height: auto; --flf2v-row-video-height: auto; }
.t2v-row { --t2v-row-input-height: auto; --t2v-row-video-height: auto; }
.tiv2v-row { --tiv2v-row-input-height: auto; --tiv2v-row-image-height: auto; --tiv2v-row-video-height: auto; }
.i2v-row { --i2v-row-input-height: auto; --i2v-row-image-height: auto; --i2v-row-video-height: auto; }

.flf2v-case, .tiv2v-case { height: 100%; grid-template-rows: auto 1fr; }
.flf2v-case .compact-input, .tiv2v-case .compact-input, .i2v-auto-case .compact-input { min-height: var(--flf2v-row-input-height, auto); background: transparent; border: 0; padding: 0; }
.flf2v-case .compact-output { width: 100%; }
.flf2v-row .flf2v-case .compact-output, .tiv2v-row .tiv2v-case .compact-output, .t2v-row .t2v-auto-case .compact-output, .i2v-row .i2v-auto-case .compact-output { margin-top: auto; }
.flf2v-frame-pair { margin: 0.2rem 0 0.28rem; }

.flf2v-thumb, .i2v-auto-thumb { width: 100%; height: auto; display: block; margin: 0; border-radius: 0; border: 0; aspect-ratio: auto; object-fit: contain; background: transparent; }
.flf2v-video, .t2v-auto-video, .i2v-auto-video { width: 100%; height: auto !important; display: block; aspect-ratio: auto !important; object-fit: contain !important; background: transparent !important; }
.flf2v-row .flf2v-thumb { height: var(--flf2v-row-image-height); }
.flf2v-row .flf2v-video { height: var(--flf2v-row-video-height) !important; }

.t2v-case-grid, .i2v-case-grid, .tiv2v-case-grid { grid-template-columns: 1fr; }
.t2v-auto-case .compact-input { min-height: var(--t2v-row-input-height); }
.t2v-row .t2v-auto-video { height: var(--t2v-row-video-height) !important; }
.i2v-auto-thumb { margin: 0.2rem 0 0.28rem; }
.i2v-row .i2v-auto-thumb { height: var(--i2v-row-image-height); }
.i2v-row .i2v-auto-video { height: var(--i2v-row-video-height) !important; }

.tiv2v-unified-panel { padding: 0.72rem; }
.tiv2v-case .compact-input { min-height: var(--tiv2v-row-input-height); background: transparent; border: 0; padding: 0; }
.tiv2v-before-video, .tiv2v-after-video { width: 100%; height: auto !important; display: block; aspect-ratio: auto !important; object-fit: contain !important; background: transparent !important; }
.tiv2v-row .tiv2v-before-video, .tiv2v-row .tiv2v-after-video { height: var(--tiv2v-row-video-height) !important; }
.tiv2v-before-video { margin: 0.2rem 0 0.28rem; }

.tiv2v-meta-row { display: grid; grid-template-columns: minmax(92px, 38%) 1fr; gap: 0.38rem; align-items: start; margin-top: 0.1rem; }
.tiv2v-ref-image { width: 100%; height: auto; display: block; border-radius: 6px; border: 1px solid var(--border); aspect-ratio: auto; object-fit: contain; background: transparent; }
.tiv2v-row .tiv2v-ref-image { height: var(--tiv2v-row-image-height); }
.tiv2v-meta-row p { margin: 0; color: var(--text-secondary); font-size: 0.74rem; line-height: 1.35; }

/* ── Reasoning ───────────────────────────────────────────── */
.reasoning-unified-panel { padding: 0.72rem; }
.reasoning-case-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.52rem; }
.compact-case.reasoning-case { grid-template-columns: minmax(0, 0.75fr) minmax(0, 1.3fr) minmax(0, 1.05fr); gap: 0.45rem; align-items: stretch; height: 100%; }
.reasoning-col { border: 1px dashed var(--border-accent); border-radius: 8px; padding: 0.38rem; background: var(--accent-soft); display: grid; align-content: start; gap: 0.26rem; }
.reasoning-col strong { display: block; margin: 0; font-size: 0.77rem; color: var(--text); }
.reasoning-image-row { width: 100%; display: grid; gap: 0.28rem; margin: 0.08rem 0 0.14rem; }
.reasoning-image-row.count-1 { grid-template-columns: 1fr; }
.reasoning-image-row.count-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.reasoning-input-image { width: 100%; height: auto; display: block; border-radius: 7px; border: 1px solid var(--border); aspect-ratio: auto; object-fit: contain; background: transparent; }
.reasoning-user-prompt { margin: 0; color: var(--text-secondary); font-size: 0.74rem; line-height: 1.35; }
.reasoning-user-prompt .prompt-inline-label { display: inline; font-weight: 700; color: var(--text); }
.reasoning-trace-text { margin: 0; white-space: pre-wrap; word-break: break-word; color: var(--text-secondary); font-family: "JetBrains Mono", ui-monospace, monospace; font-size: 0.68rem; line-height: 1.4; }
.reasoning-output-col { align-content: start; }
.reasoning-output-video { width: 100%; height: auto !important; display: block; aspect-ratio: auto !important; object-fit: contain !important; background: transparent !important; }

/* ── Editing ─────────────────────────────────────────────── */
.editing-case-stack { display: grid; gap: 0.52rem; }
.editing-case-row { --editing-row-input-height: auto; --editing-row-video-height: auto; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.editing-case { height: 100%; grid-template-rows: auto 1fr; }
.editing-case .compact-input { min-height: var(--editing-row-input-height); background: transparent; border: 0; padding: 0; }
.editing-before-video, .editing-after-video { width: 100%; height: auto !important; display: block; aspect-ratio: auto !important; object-fit: contain !important; background: transparent !important; }
.editing-case-row .editing-before-video, .editing-case-row .editing-after-video { height: var(--editing-row-video-height) !important; }
.editing-case-row .editing-case .compact-output { margin-top: auto; }
.editing-before-video { margin: 0.2rem 0 0.28rem; }
.editing-before-video.narrow-fit-55, .editing-after-video.narrow-fit-55 { width: 52%; margin-left: auto; margin-right: auto; }

/* ── Compact Case ────────────────────────────────────────── */

.compact-case {
  display: grid; grid-template-columns: 1fr; gap: 0.34rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  background: var(--bg-card-solid);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.compact-case::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 2px solid transparent;
  background: var(--gradient-main) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.compact-case:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.compact-case:hover::after {
  opacity: 1;
}

.t2v-case { gap: 0.34rem; }
.t2v-prompt { margin: 0; padding: 0.35rem 0.45rem; border-radius: 8px; border: 1px dashed var(--border-accent); background: var(--accent-soft); color: var(--text-secondary); font-size: 0.74rem; line-height: 1.35; }
.t2v-prompt strong { color: var(--text); }

.compact-input { border: 1px dashed rgba(155, 27, 48, 0.1); border-radius: 8px; padding: 0.4rem; background: rgba(155, 27, 48, 0.015); }
.compact-input strong { display: block; margin-bottom: 0.18rem; font-size: 0.77rem; color: var(--accent); }
.compact-input p { margin: 0; color: var(--text-secondary); font-size: 0.74rem; line-height: 1.35; }
.compact-input p .prompt-inline-label { display: inline; font-weight: 700; color: var(--text); }
.input-thumb { width: 100%; display: block; border-radius: 6px; border: 1px solid var(--border); margin: 0.24rem 0; }

.i2v-case { gap: 0.36rem; }
.i2v-input-row { display: grid; grid-template-columns: 52px 1fr; gap: 0.4rem; align-items: center; padding: 0.34rem; border: 1px dashed var(--border-accent); border-radius: 8px; background: var(--accent-soft); }
.i2v-input-row p { margin: 0; color: var(--text-secondary); font-size: 0.7rem; line-height: 1.3; }
.i2v-thumb { width: 52px; height: 32px; margin: 0; object-fit: cover; }
.frame-pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.32rem; margin: 0.24rem 0; }

.compact-output { display: grid; align-content: start; gap: 0.28rem; }
.compact-output::before { content: "Output"; display: block; margin-bottom: 0.18rem; font-size: 0.7rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--accent); line-height: 1.2; }
.compact-video { aspect-ratio: 16 / 10; max-height: 125px; }
.compact-input-video { aspect-ratio: 16 / 10; max-height: 90px; margin: 0.24rem 0; }
.compact-output code { width: fit-content; font-size: 0.72rem; }

.title-row { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.7rem; }
.chip { border-radius: 999px; border: 1px solid var(--border-accent); background: var(--accent-soft); color: var(--accent); padding: 0.28rem 0.7rem; font-size: 0.8rem; font-weight: 600; }

/* ── Cards ───────────────────────────────────────────────── */

.glass-card, .hero-video-card, .video-card, .compare-card, .table-wrap, .bibtex-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.glass-card {
  padding: 1.6rem 1.5rem;
  position: relative;
  overflow: hidden;
  background: linear-gradient(145deg, rgba(255,255,255,0.92), rgba(253,246,244,0.75));
  backdrop-filter: blur(16px);
  border: 1px solid rgba(155, 27, 48, 0.06);
  box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255,255,255,0.8);
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 5%, rgba(155,27,48,0.2) 30%, rgba(200,134,10,0.15) 70%, transparent 95%);
}

.glass-card::after {
  content: '';
  position: absolute;
  top: -50%; right: -50%;
  width: 100%; height: 100%;
  background: radial-gradient(circle, rgba(155,27,48,0.02) 0%, transparent 60%);
  pointer-events: none;
}

.glass-card p { margin: 0.5rem 0; color: var(--text-secondary); line-height: 1.85; font-size: 0.95rem; position: relative; z-index: 1; }
.hero-video-card { padding: 1rem; }

/* ── Architecture Section ────────────────────────────────── */

.architecture-section { padding-top: 3rem; padding-bottom: 4rem; }
.architecture-card { padding: 1.1rem; }
.architecture-image { width: 100%; display: block; border-radius: 12px; border: 1px solid var(--border); background: #fff; object-fit: contain; }

.architecture-figure-wrap {
  margin: 1rem 0 2.5rem;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius);
  padding: 1.2rem;
  box-shadow: var(--shadow-card), var(--glow);
  position: relative;
  overflow: hidden;
}

.architecture-figure-wrap::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: conic-gradient(from 0deg, rgba(155,27,48,0.15), transparent 25%, rgba(200,134,10,0.12), transparent 50%, rgba(232,66,78,0.1), transparent 75%, rgba(155,27,48,0.08));
  z-index: -1;
  animation: borderRotate 8s linear infinite;
  filter: blur(1px);
}

.architecture-figure-wrap:hover::before {
  filter: blur(2px);
  background: conic-gradient(from 0deg, rgba(155,27,48,0.25), transparent 25%, rgba(200,134,10,0.2), transparent 50%, rgba(232,66,78,0.18), transparent 75%, rgba(155,27,48,0.15));
}

@keyframes borderRotate { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

.figure-caption { margin: 0.8rem 0 0; text-align: center; color: var(--text-dim); font-size: 0.86rem; line-height: 1.55; }
.figure-caption strong { color: var(--text); }

.architecture-overview {
  margin: 0.5rem 0 1.4rem;
  padding: 1.3rem 1.5rem;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(155,27,48,0.02), rgba(200,134,10,0.015));
  border: 1px solid var(--border-accent);
}
.architecture-overview p { margin: 0; color: var(--text-secondary); line-height: 1.85; font-size: 0.95rem; }
.architecture-overview p + p { margin-top: 0.8rem; }

.arch-feature-list { list-style: none; padding-left: 0; margin: 1rem 0 0; }
.arch-feature-list li {
  margin: 0.7rem 0; padding: 0.9rem 1.2rem;
  border-left: 3px solid var(--accent);
  background: linear-gradient(90deg, rgba(155,27,48,0.04), transparent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary); line-height: 1.85; font-size: 0.95rem;
  transition: all 0.3s;
  position: relative;
}
.arch-feature-list li:hover {
  background: linear-gradient(90deg, rgba(155,27,48,0.07), rgba(200,134,10,0.02));
  border-left-color: var(--accent-light);
  border-left-width: 4px;
  transform: translateX(2px);
}
.arch-feature-list li strong { color: var(--text); }

.architecture-brief { margin: 0.2rem 0 0.9rem; padding: 0.88rem 0.98rem; border: 1px solid var(--border); border-radius: 14px; background: var(--bg-card-solid); }
.architecture-brief p { margin: 0; color: var(--text-secondary); line-height: 1.78; }
.architecture-brief ul { margin: 0.62rem 0 0; padding-left: 1.15rem; color: var(--text-secondary); }
.architecture-brief li { margin: 0.34rem 0; line-height: 1.78; }
.architecture-brief .highlight-list { list-style: none; padding-left: 0; margin: 0.7rem 0 0; }
.architecture-brief .highlight-list li { margin: 0.5rem 0; padding: 0.6rem 0.85rem; border-left: 3px solid var(--accent); background: var(--accent-soft); border-radius: 0 8px 8px 0; }

/* ── Demo Video ──────────────────────────────────────────── */

.demo-video { width: 100%; display: block; border-radius: 8px; border: 1px solid var(--border); background: #f5f5f5; aspect-ratio: 16 / 9; object-fit: cover; }
video.demo-video:not([src]) { background: linear-gradient(90deg, #f5f3f0, #ebe8e4, #f5f3f0); background-size: 200% 100%; animation: videoShimmer 2s ease-in-out infinite; }
@keyframes videoShimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

[id$="CaseGrid"]:empty { min-height: 100px; display: grid; place-items: center; border: 1px dashed var(--border); border-radius: 10px; }
[id$="CaseGrid"]:empty::after { content: "Loading demos…"; color: var(--text-dim); font-size: 0.85rem; }

/* ── Misc Labels ─────────────────────────────────────────── */
.slot-label { margin-top: 0.72rem; color: var(--text-dim); font-size: 0.87rem; }
.slot-label code, .video-card code, .compact-input code, .compact-output code, .replace-tip code {
  color: var(--accent); background: var(--accent-soft); border: 1px solid var(--border-accent);
  padding: 0.12rem 0.4rem; border-radius: 5px; font-family: "JetBrains Mono", monospace; font-size: 0.78em;
}

/* ── Video Grid ──────────────────────────────────────────── */
.video-grid { display: grid; gap: 1rem; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.video-card { padding: 0.72rem; }
.video-card p { margin: 0.68rem 0 0.42rem; font-weight: 600; font-size: 0.93rem; color: var(--text); }
.video-card code { font-size: 0.8rem; }

/* ── Interleaved ─────────────────────────────────────────── */
.interleaved-unified-panel { padding: 0.72rem; }
.comp-grid-tail { display: none; }
.interleaved-case-grid { display: grid; grid-template-columns: 1fr; gap: 0.52rem; }
.interleaved-case-grid-unified { grid-template-columns: 1fr; }
.interleaved-row { --interleaved-row-input-height: auto; --interleaved-row-image-height: auto; --interleaved-row-video-height: auto; --interleaved-image-gap: 0.22rem; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0.52rem; }
.interleaved-case { display: grid; grid-template-rows: auto 1fr; gap: 0.32rem; border: 1px solid var(--border); border-radius: 10px; background: var(--bg-card-solid); padding: 0.42rem; height: 100%; }
.interleaved-case .compact-input { width: 100%; min-height: var(--interleaved-row-input-height); padding: 0.34rem; border: 0; background: transparent; }
.interleaved-row .interleaved-case .compact-output { margin-top: auto; }
.interleaved-image-row { width: 100%; display: grid; gap: var(--interleaved-image-gap); align-items: start; margin: 0.22rem 0 0.26rem; }
.interleaved-image-row.count-1 { grid-template-columns: minmax(0, 1fr); justify-items: center; }
.interleaved-image-row.count-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.interleaved-image-row.count-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.interleaved-image-row.count-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.interleaved-thumb { width: 100%; height: auto; display: block; aspect-ratio: auto; object-fit: contain; border-radius: 6px; border: 1px solid var(--border); }
.interleaved-image-row.count-1 .interleaved-thumb { width: calc((100% - var(--interleaved-image-gap)) / 2); max-width: 100%; margin-inline: auto; }
.interleaved-video { width: 100%; height: auto; display: block; aspect-ratio: auto; object-fit: contain; border-radius: 8px; border: 1px solid var(--border); background: transparent; }
.interleaved-row .interleaved-thumb { height: var(--interleaved-row-image-height); }
.interleaved-row .interleaved-video { height: var(--interleaved-row-video-height) !important; }

/* ── Comparison ──────────────────────────────────────────── */
.comp-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.7rem; }
.comp-grid-tail { margin-top: 0.78rem; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.comp-card { background: var(--bg-card-solid); border: 1px solid var(--border); border-radius: 14px; box-shadow: var(--shadow-card); padding: 0.62rem; display: grid; gap: 0.34rem; }
.comp-title { margin: 0; font-size: 0.82rem; font-weight: 650; color: var(--text); line-height: 1.35; }
.comp-input-strip { border: 1px dashed var(--border-accent); border-radius: 8px; background: var(--accent-soft); padding: 0.34rem; display: grid; gap: 0.24rem; }
.mini-label { display: inline-block; font-size: 0.62rem; letter-spacing: 0.08em; color: var(--text-dim); text-transform: uppercase; font-weight: 700; }
.comp-image-row { display: grid; gap: 0.22rem; justify-content: start; align-items: center; }
.comp-image-row.count-1 { grid-template-columns: 54px; }
.comp-image-row.count-2 { grid-template-columns: repeat(2, 50px); }
.comp-image-row.count-3 { grid-template-columns: repeat(3, 42px); }
.comp-image-row.count-4 { grid-template-columns: repeat(4, 36px); }
.comp-thumb { width: 100%; height: 30px; object-fit: cover; border-radius: 6px; border: 1px solid var(--border); }
.comp-prompt { margin: 0; color: var(--text-secondary); font-size: 0.69rem; line-height: 1.3; }
.comp-mini-video { max-height: 54px; aspect-ratio: 16 / 10; border-radius: 8px; }
.comp-card code, .interleaved-case code { width: fit-content; font-size: 0.72rem; }
.compare-list { display: grid; gap: 1rem; margin-top: 1rem; }
.compare-card { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; overflow: hidden; }
.pane { padding: 0.72rem; background: var(--bg-pearl); }
.pane span { display: inline-block; margin-bottom: 0.5rem; color: var(--text-secondary); font-size: 0.85rem; border: 1px solid var(--border); border-radius: 999px; padding: 0.18rem 0.56rem; }
.replace-tip { margin: 1.25rem 0 0; color: var(--text-dim); line-height: 1.7; }

/* ── Results Table ───────────────────────────────────────── */

.table-wrap {
  margin-top: 1.2rem; overflow-x: auto; padding: 0.8rem;
  border: 1px solid var(--border-accent);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.85);
  box-shadow: var(--shadow-card);
  position: relative;
}

.table-wrap::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(155,27,48,0.15), transparent);
}

.table-wrap h3 { margin: 0.3rem 0 0.9rem; color: var(--text); }
table { width: 100%; border-collapse: collapse; min-width: 0; table-layout: auto; }

thead th {
  background: rgba(155, 27, 48, 0.03);
  color: var(--text); padding: 0.6rem 0.45rem;
  text-align: center; vertical-align: middle;
  border-bottom: 2px solid rgba(155, 27, 48, 0.1);
  font-size: 0.76rem; font-weight: 600; white-space: nowrap;
}

tbody td {
  padding: 0.55rem 0.45rem; color: var(--text-secondary);
  border-bottom: 1px solid rgba(0,0,0,0.04);
  font-size: 0.8rem; text-align: center; vertical-align: middle;
  white-space: nowrap; font-variant-numeric: tabular-nums;
}

thead th:nth-child(1), thead th:nth-child(2), tbody td:nth-child(1), tbody td:nth-child(2) { text-align: left; }

.type-badge { display: inline-block; padding: 0.15rem 0.45rem; border-radius: 4px; font-size: 0.68rem; font-weight: 600; letter-spacing: 0.02em; white-space: nowrap; }
.type-badge.task-specific { background: rgba(200, 134, 10, 0.08); color: var(--gold); }
.type-badge.unified { background: rgba(155, 27, 48, 0.06); color: var(--accent); }

.highlight-row {
  background: linear-gradient(90deg, rgba(155, 27, 48, 0.06), rgba(200, 134, 10, 0.03));
  position: relative;
}
.highlight-row::after {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--gradient-main);
}
.highlight-row td { color: var(--text); font-weight: 600; }
.highlight-row-soft { background: rgba(200, 134, 10, 0.025); }

tbody tr { transition: background 0.2s; }
tbody tr:hover { background: rgba(155, 27, 48, 0.025); }

.metric-note { margin: 0.8rem 0 0.2rem; color: var(--text-dim); font-size: 0.8rem; }

/* ── BibTeX ──────────────────────────────────────────────── */
.bibtex-box { overflow: auto; background: var(--bg-pearl); border: 1px solid var(--border); }
.bibtex-box pre { margin: 0; padding: 1.2rem; font-family: "JetBrains Mono", monospace; font-size: 0.82rem; line-height: 1.6; color: var(--text-secondary); }

/* ── Footer ──────────────────────────────────────────────── */
footer { margin: 4rem 0 2.5rem; color: var(--text-dim); text-align: center; font-size: 0.85rem; }
footer a { color: var(--accent); text-decoration: none; font-weight: 500; }
footer a:hover { text-decoration: underline; }

/* ── Responsive ──────────────────────────────────────────── */

@media (max-width: 1080px) {
  .video-grid, .comp-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .interleaved-row, .compact-case-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flf2v-row, .t2v-row, .i2v-row, .tiv2v-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .hero { padding: 5rem 0 3rem; }
  .hero h1 { font-size: clamp(2.2rem, 11vw, 3.2rem); letter-spacing: -1px; }
  .hero-title { gap: 0.4rem; }
  .weaving-mark { width: 38px; height: 38px; }
  .hero-subtitle { font-size: 0.95rem; }
  .hero-authors { font-size: 0.85rem; line-height: 1.7; }
  .hero-affiliation { font-size: 0.85rem; }
  .hero-notes { font-size: 0.8rem; }
  .task-tabs { gap: 0.3rem; }
  .task-tab { padding: 0.4rem 0.7rem; font-size: 0.78rem; }
  .top-nav nav { gap: 0.1rem; }
  .top-nav nav a { font-size: 0.78rem; padding: 0.35rem 0.5rem; }
  .compact-panel { padding: 0.6rem; }
  .task-panel-head h4 { font-size: var(--task-panel-title-size-mobile); }
  .task-badge { font-size: var(--task-badge-size-mobile); }
  .video-grid, .comp-grid, .interleaved-row, .compact-case-grid { grid-template-columns: 1fr; }
  .flf2v-row, .t2v-row, .i2v-row, .tiv2v-row { grid-template-columns: 1fr; }
  .compact-case { grid-template-columns: 1fr; }
  .tiv2v-meta-row { grid-template-columns: 1fr; }
  .compare-card { grid-template-columns: 1fr; }
  .comp-image-row.count-4 { grid-template-columns: repeat(4, 1fr); }
  .compact-video { max-height: 170px; }
  .i2v-input-row { grid-template-columns: 46px 1fr; gap: 0.32rem; }
  .i2v-thumb { width: 46px; height: 28px; }
}

/* ── Scroll Animations ───────────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

.reveal-stagger > * { opacity: 0; transform: translateY(20px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0.05s; }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 0.1s; }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 0.15s; }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 0.2s; }
.reveal-stagger.visible > *:nth-child(5) { transition-delay: 0.25s; }
.reveal-stagger.visible > * { opacity: 1; transform: none; }