/* ── Design tokens ── */
:root {
  --bg:           #060d18;
  --bg-deep:      #040a12;
  --panel:        rgba(9, 18, 30, 0.82);
  --panel-strong: rgba(7, 15, 26, 0.95);
  --line:         rgba(255,255,255,0.07);
  --line-strong:  rgba(255,255,255,0.14);

  --text:  #ddeeff;
  --muted: #7a90a8;

  --amber: #f0b42a;
  --teal:  #1dd3c0;
  --rose:  #e05060;
  --blue:  #60a4f0;
  --amber-dim: rgba(240,180,42,0.12);
  --teal-dim:  rgba(29,211,192,0.10);

  --shadow-sm: 0 4px 20px rgba(0,0,0,0.28);
  --shadow:    0 16px 50px rgba(0,0,0,0.4);
  --shadow-lg: 0 28px 80px rgba(0,0,0,0.5);

  --radius:    1.5rem;
  --radius-sm: 1rem;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: "DM Sans", sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background:
    radial-gradient(ellipse 60% 40% at 10% 0%, rgba(240,180,42,0.10) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 85% 15%, rgba(29,211,192,0.09) 0%, transparent 55%),
    radial-gradient(ellipse 60% 40% at 45% 100%, rgba(224,80,96,0.08) 0%, transparent 55%),
    linear-gradient(170deg, #040a12 0%, #060d18 40%, #07101c 100%);
  min-height: 100vh;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

/* ── Ambient blobs ── */
.site-shell { position: relative; overflow: clip; }

.ambient {
  position: fixed;
  border-radius: 999px;
  filter: blur(120px);
  pointer-events: none;
  opacity: 0;
  animation: ambientFade 2s ease forwards;
}
@keyframes ambientFade { to { opacity: 1; } }

.ambient-a { width: 28rem; height: 28rem; top: -8rem; left: -8rem;  background: rgba(240,180,42,0.18); opacity:0; animation-delay: 0.2s; }
.ambient-b { width: 30rem; height: 30rem; top: 4rem;  right: -9rem; background: rgba(29,211,192,0.14);  opacity:0; animation-delay: 0.4s; }
.ambient-c { width: 26rem; height: 26rem; bottom: -8rem; left: 30%; background: rgba(224,80,96,0.11);   opacity:0; animation-delay: 0.6s; }

/* ── Nav ── */
.topbar,
main,
.footer {
  width: min(1280px, calc(100% - 2.4rem));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0.8rem;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 0.9rem;
  padding: 0.7rem 0.85rem;
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  background: linear-gradient(180deg, rgba(6, 13, 24, 0.88), rgba(6, 13, 24, 0.72));
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 999px;
  box-shadow:
    0 14px 42px rgba(0,0,0,0.26),
    inset 0 1px 0 rgba(255,255,255,0.05);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  padding: 0.05rem 0.15rem 0.05rem 0.05rem;
}
.brand-wordmark {
  display: block;
  height: 46px;
  width: auto;
  max-width: min(320px, 100%);
  object-fit: contain;
  object-position: left center;
  border-radius: 0.45rem;
}

.topnav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.28rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(255,255,255,0.03);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.03);
}
.topnav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.15rem;
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--muted);
  transition: color 160ms ease, background 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}
.topnav a:hover,
.topnav a:focus-visible {
  color: var(--text);
  background: linear-gradient(180deg, rgba(255,255,255,0.09), rgba(255,255,255,0.05));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
  transform: translateY(-1px);
}

/* ── Section base ── */
main section { padding: 2rem 0; }

.band {
  padding: 2.4rem;
  margin: 1rem 0;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.section-head { margin-bottom: 2rem; max-width: 52rem; }
.section-head p { margin-top: 0.85rem; color: var(--muted); line-height: 1.75; }

/* ── Typography ── */
.eyebrow {
  font-family: "Syne", sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
}

h1, h2, h3, h4 {
  font-family: "Syne", sans-serif;
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

h1 {
  font-size: clamp(2.8rem, 5.5vw, 5.4rem);
  max-width: 14ch;
  margin: 0.75rem 0;
}

h2 { font-size: clamp(1.7rem, 3vw, 2.6rem); }
h3 { font-size: 1.1rem; font-weight: 700; letter-spacing: -0.02em; }
h4 { font-size: 1rem; font-weight: 700; }

.lede {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--muted);
  max-width: 48rem;
  margin-top: 0.5rem;
}

.lede-strong {
  color: var(--text);
  font-weight: 700;
}

/* ── Hero ── */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.9fr);
  gap: 1.6rem;
  align-items: start;
  padding-top: 2.6rem;
  padding-bottom: 2.4rem;
  border: none;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
}

/* ── CTA Buttons ── */
.hero-actions, .paper-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.85rem 1.4rem;
  border-radius: 999px;
  font-family: "Syne", sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform 170ms ease, box-shadow 170ms ease, filter 170ms ease;
  box-shadow: var(--shadow-sm);
}
.button:hover { transform: translateY(-2px); box-shadow: var(--shadow); }

.button-mark {
  width: 16px;
  height: 16px;
  margin-right: 0.5rem;
  object-fit: contain;
  flex-shrink: 0;
}

.button-mark-dark {
  filter: brightness(0) saturate(100%);
}

.button-primary  { color: #050d18; background: linear-gradient(130deg, var(--amber) 0%, #ffd060 100%); }
.button-secondary{ color: #050d18; background: linear-gradient(130deg, var(--teal)  0%, #7cf4e8 100%); }
.button-ghost    { color: var(--text); border: 1px solid var(--line-strong); background: rgba(255,255,255,0.035); }
.button-ghost:hover { border-color: rgba(255,255,255,0.22); }

/* ── Stats row ── */
.stats-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 2rem;
  padding: 1rem 1.4rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--panel-strong);
}
.stat-pill { display: flex; align-items: baseline; gap: 0.45rem; }
.stat-val  { font-family: "Syne", sans-serif; font-size: 1.3rem; font-weight: 800; color: var(--amber); letter-spacing: -0.04em; }
.stat-lbl  { font-size: 0.78rem; color: var(--muted); font-weight: 500; }
.stat-divider { width: 1px; height: 1.5rem; background: var(--line-strong); }
.stat-source   { margin-left: auto; font-size: 0.7rem; color: var(--muted); transition: color 160ms ease; }
.stat-source:hover { color: var(--text); }

/* ── Hero panel ── */
.hero-panel { display: grid; }

.hero-note {
  padding: 1.6rem;
  background: linear-gradient(160deg, rgba(9,18,30,0.95), rgba(6,12,22,0.98));
  min-height: 100%;
}

.hero-note-head {
  display: grid;
  grid-template-columns: 52px minmax(0,1fr);
  gap: 1rem;
  align-items: center;
  margin-bottom: 1.4rem;
}
.hero-logo-lg {
  width: 58px;
  height: 58px;
  object-fit: contain;
  border-radius: 1rem;
}
.hero-note-head .eyebrow { margin-bottom: 0.3rem; }
.hero-note-head strong {
  display: block;
  font-family: "Syne", sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.4;
}

.feature-list {
  list-style: none;
  display: grid;
  gap: 0.75rem;
}
.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  font-size: 0.93rem;
  color: var(--muted);
  line-height: 1.5;
}
.feature-list li::before {
  content: "◆";
  font-size: 0.45rem;
  color: var(--amber);
  margin-top: 0.45rem;
  flex-shrink: 0;
}

.note-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.4rem;
}

.hero-authors {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 0.85rem;
  margin-top: 0.95rem;
}
.badge {
  display: inline-block;
  padding: 0.25rem 0.8rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  font-family: "Syne", sans-serif;
  letter-spacing: 0.05em;
  text-align: center;
}
.badge-amber { background: var(--amber-dim); color: var(--amber); border: 1px solid rgba(240,180,42,0.2); }
.badge-teal  { background: var(--teal-dim);  color: var(--teal);  border: 1px solid rgba(29,211,192,0.18); }
.badge-blue  { background: rgba(96,164,240,0.1); color: var(--blue); border: 1px solid rgba(96,164,240,0.2); }

/* ── Glass base ── */
.glass {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.author-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1rem;
  padding: 1.35rem 1.2rem 1.25rem;
  background: linear-gradient(160deg, rgba(9,18,30,0.95), rgba(6,12,22,0.98));
  transition: transform 200ms ease, border-color 200ms ease;
}
.author-card:hover { transform: translateY(-5px); border-color: var(--line-strong); }
.author-card img {
  width: 110px;
  height: 110px;
  object-fit: cover;
  border-radius: 999px;
  border: 2px solid rgba(255,255,255,0.14);
  box-shadow:
    0 0 0 8px rgba(255,255,255,0.03),
    0 18px 34px rgba(0,0,0,0.28);
}
.author-info {
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
  align-items: center;
}
.author-info strong {
  font-family: "Syne", sans-serif;
  font-size: 1rem;
  font-weight: 700;
}
.author-info span {
  max-width: 24ch;
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.55;
}

.author-card-compact {
  flex-direction: row;
  align-items: center;
  text-align: left;
  gap: 0.9rem;
  padding: 0.95rem;
}

.author-card-compact img {
  width: 64px;
  height: 64px;
  flex-shrink: 0;
  box-shadow:
    0 0 0 6px rgba(255,255,255,0.025),
    0 10px 22px rgba(0,0,0,0.22);
}

.author-card-compact .author-info {
  align-items: flex-start;
}

.author-card-compact .author-info strong {
  font-size: 0.92rem;
}

.author-card-compact .author-info span {
  max-width: none;
  font-size: 0.74rem;
  line-height: 1.45;
}

/* ── Logos ── */
.logo-rail {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.logo-chip {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.3rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--panel-strong);
  transition: transform 200ms ease, border-color 200ms ease;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--muted);
}
.logo-chip img { width: 32px; height: 32px; object-fit: contain; }
.logo-chip img.logo-chip-wide { width: 56px; height: 32px; }
.logo-chip:hover { transform: translateY(-3px); border-color: var(--line-strong); color: var(--text); }

/* ── Method ── */
.method-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.3rem;
  align-items: start;
}

.animation-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.26fr) minmax(230px, 0.58fr);
  grid-template-areas:
    "header header"
    "meta meta"
    "canvas copy";
  background: linear-gradient(160deg, rgba(9,18,30,0.96), rgba(6,12,22,0.99));
  align-items: stretch;
  column-gap: 1.2rem;
  row-gap: 0.65rem;
}
.animation-header {
  grid-area: header;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.4rem 1.4rem 0;
}
.animation-header h3 { margin-top: 0.3rem; font-size: 1rem; }

.animation-controls {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.animation-meta {
  grid-area: meta;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.4rem 0;
}

.query-card {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
  padding: 0.9rem 1rem;
  border-radius: 1rem;
  border: 1px solid rgba(240,180,42,0.14);
  background: linear-gradient(180deg, rgba(240,180,42,0.08), rgba(240,180,42,0.03));
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.02);
}

.query-kicker {
  font-family: "Syne", sans-serif;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
}

.query-card p {
  font-size: 0.96rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--text);
}

.animation-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.55rem;
}

.legend-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.72rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.025);
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--muted);
}

.legend-chip::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 999px;
  background: currentColor;
  box-shadow: 0 0 0 4px rgba(255,255,255,0.04);
}

.legend-query { color: var(--amber); }
.legend-pos   { color: var(--teal); }
.legend-mid   { color: var(--blue); }
.legend-neg   { color: var(--rose); }

.stage-pill {
  display: inline-block;
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  font-family: "Syne", sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  background: var(--amber-dim);
  color: var(--amber);
  border: 1px solid rgba(240,180,42,0.2);
  white-space: nowrap;
}

.motion-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.1rem;
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.035);
  color: var(--text);
  font-family: "Syne", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.motion-toggle:hover,
.motion-toggle:focus-visible {
  background: rgba(255,255,255,0.065);
  border-color: rgba(255,255,255,0.16);
  transform: translateY(-1px);
}

.canvas-wrap {
  grid-area: canvas;
  min-width: 0;
  padding: 0 0 1.2rem 1.4rem;
  position: relative;
}
.canvas-wrap canvas {
  width: 100%;
  min-height: 0;
  border-radius: 0.75rem;
  border: 1px solid rgba(255,255,255,0.06);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.02);
  background:
    radial-gradient(circle at 18% 10%, rgba(240,180,42,0.08), transparent 22%),
    radial-gradient(circle at 78% 18%, rgba(29,211,192,0.06), transparent 20%),
    linear-gradient(180deg, #06101c 0%, #07111f 100%);
  display: block;
}

.stage-copy {
  grid-area: copy;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-self: start;
  gap: 0.35rem;
  margin: 0 1.4rem 1.2rem 0.15rem;
  padding: 1.05rem 1.15rem 1.15rem;
  border: 1px solid rgba(255,255,255,0.08);
  border-left: 2px solid rgba(29,211,192,0.38);
  background: linear-gradient(180deg, rgba(255,255,255,0.022), rgba(255,255,255,0.012));
  border-radius: 0.9rem;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.02);
}
.stage-copy-kicker {
  font-family: "Syne", sans-serif;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
}
.stage-copy h4 {
  margin-bottom: 0.1rem;
  font-size: 1.05rem;
  line-height: 1.2;
}
.stage-copy p  {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.7;
  max-width: 30ch;
}

.method-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 1rem;
}

.narrative-card {
  padding: 1.4rem;
  background: linear-gradient(160deg, rgba(9,18,30,0.94), rgba(6,12,22,0.97));
  transition: border-color 200ms ease;
}
.narrative-card:hover { border-color: var(--line-strong); }
.narrative-card p {
  margin-top: 0.65rem;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.7;
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  font-family: "Syne", sans-serif;
  font-size: 0.9rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}
.card-icon sub { font-size: 0.6rem; }
.card-icon-q { background: var(--amber-dim); color: var(--amber); border: 1px solid rgba(240,180,42,0.2); }
.card-icon-d { background: var(--teal-dim);  color: var(--teal);  border: 1px solid rgba(29,211,192,0.2);  }
.card-icon-i { background: rgba(96,164,240,0.1); color: var(--blue); border: 1px solid rgba(96,164,240,0.2); font-size: 1.1rem; }

/* ── Paper ── */
.paper-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 1rem;
  margin-bottom: 1.6rem;
}
.paper-actions { margin-top: 0; }

.citation-shell {
  margin-top: 1.2rem;
  padding: 1.25rem;
  background: linear-gradient(160deg, rgba(9,18,30,0.95), rgba(6,12,22,0.98));
}

.citation-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.citation-copy {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.2rem;
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  font-family: "Syne", sans-serif;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.citation-copy:hover,
.citation-copy:focus-visible {
  background: rgba(255,255,255,0.075);
  border-color: rgba(255,255,255,0.16);
  transform: translateY(-1px);
}

.citation-pre {
  margin: 0;
}

/* ── Code tabs ── */
.tab-shell {
  background: var(--panel-strong);
  padding: 1.2rem;
}
.tab-nav {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.2rem;
}
.tab {
  border: 1px solid var(--line);
  color: var(--muted);
  background: rgba(255,255,255,0.03);
  border-radius: 999px;
  padding: 0.6rem 1.1rem;
  font-family: "Syne", sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 160ms ease;
}
.tab.active {
  color: #050d18;
  background: linear-gradient(130deg, var(--amber), #ffd060);
  border-color: transparent;
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.tab-panel[hidden] { display: none !important; }

pre {
  margin: 0;
  padding: 1.4rem;
  overflow-x: auto;
  border-radius: var(--radius-sm);
  background: rgba(3, 8, 14, 0.98);
  border: 1px solid rgba(255,255,255,0.05);
}
code {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.875rem;
  line-height: 1.65;
  color: #c4daf5;
}

/* ── Ecosystem ── */
.link-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 1rem;
}
.link-card {
  display: flex;
  flex-direction: column;
  padding: 1.4rem;
  background: linear-gradient(160deg, rgba(9,18,30,0.95), rgba(6,12,22,0.98));
  transition: transform 200ms ease, border-color 200ms ease;
}
.link-card:hover { transform: translateY(-5px); border-color: var(--line-strong); }
.link-card p {
  margin-top: 0.65rem;
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.65;
  flex-grow: 1;
}
.link-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  margin-bottom: 0.95rem;
}

.link-card-logo {
  width: 28px;
  height: 28px;
  object-fit: contain;
  flex-shrink: 0;
}

.link-card-logo-wide {
  width: 62px;
  height: 28px;
}

.link-card-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 1.8rem;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.04);
  font-family: "Syne", sans-serif;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.link-arrow {
  display: inline-block;
  margin-top: 1.2rem;
  font-family: "Syne", sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--amber);
  opacity: 0.7;
  transition: opacity 160ms ease, transform 160ms ease;
}
.link-card:hover .link-arrow { opacity: 1; transform: translateX(3px); }

/* ── Footer ── */
.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 2.4rem 0 5rem;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}
.footer-logo {
  width: 42px;
  height: 42px;
  object-fit: contain;
  border-radius: 0.8rem;
}
.footer-brand strong {
  display: block;
  font-family: "Syne", sans-serif;
  font-size: 1rem;
  font-weight: 700;
}
.footer-brand span { display: block; font-size: 0.8rem; color: var(--muted); margin-top: 0.15rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1.4rem; }
.footer-links a { font-size: 0.88rem; color: var(--muted); transition: color 160ms ease; }
.footer-links a:hover { color: var(--text); }

/* ── Scroll reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 900ms cubic-bezier(0.16,1,0.3,1), transform 900ms cubic-bezier(0.16,1,0.3,1);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ── Responsive ── */
@media (max-width: 1100px) {
  .hero, .method-grid { grid-template-columns: 1fr; }
  .method-cards { grid-template-columns: 1fr; }
  .link-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}

@media (max-width: 1180px) {
  .animation-shell {
    grid-template-columns: 1fr;
    grid-template-areas:
      "header"
      "meta"
      "canvas"
      "copy";
  }

  .animation-meta {
    flex-direction: column;
    align-items: stretch;
  }

  .animation-controls {
    justify-content: flex-start;
  }

  .animation-legend {
    justify-content: flex-start;
  }

  .stage-copy {
    margin: 0 1.4rem 1.4rem;
    padding: 1rem 0 0;
    border: none;
    border-left: none;
    border-top: 1px solid var(--line);
    border-radius: 0;
    box-shadow: none;
    background: none;
  }

  .stage-copy p {
    max-width: none;
  }
}

@media (max-width: 900px) {
  .paper-grid  { grid-template-columns: 1fr; }

  .citation-head {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 860px) {
  .topbar {
    flex-direction: column;
    align-items: stretch;
    border-radius: 1.4rem;
    padding: 0.8rem;
  }

  .footer { flex-direction: column; align-items: flex-start; }

  .brand {
    padding: 0.05rem 0.1rem;
  }

  .brand-wordmark {
    height: 42px;
    max-width: min(285px, 100%);
  }

  .topnav {
    width: 100%;
    flex-wrap: wrap;
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .band { padding: 1.4rem; }
  .link-grid { grid-template-columns: 1fr; }
  .hero-authors { grid-template-columns: 1fr; }
  .hero-actions, .paper-actions { flex-direction: column; }
  .button { width: 100%; }
  .animation-header,
  .animation-meta,
  .canvas-wrap { padding: 0.9rem 0.95rem 1rem; }
  .citation-copy { width: 100%; }
  .topbar {
    top: 0.5rem;
    width: min(1280px, calc(100% - 1.2rem));
  }
  .brand-wordmark {
    height: 36px;
    max-width: min(240px, 100%);
  }
  .topnav a {
    flex: 1 1 calc(50% - 0.25rem);
  }
  .stat-source { display: none; }
  .stats-row { justify-content: space-around; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .ambient {
    animation: none;
    opacity: 0.6;
  }

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

  .button,
  .topnav a,
  .logo-chip,
  .author-card,
  .link-card,
  .motion-toggle,
  .citation-copy,
  .tab,
  .link-arrow {
    transition: none;
  }
}