/* siyulio.com — production styles
   Black/gold luxury aesthetic. Linear nav + Vercel cursor-glow cards.
   Tokens baked from final Tweaks: bgDepth=75, borderStrength=150, accentHue=80 */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Design tokens ──────────────────────────────────────────────── */
:root {
  --font-tc:   "Noto Sans TC", -apple-system, BlinkMacSystemFont, "PingFang TC", "Microsoft JhengHei", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* dark theme (default) */
  --bg:           rgb(12, 12, 12);
  --surface-1:    rgb(22, 22, 22);
  --surface-2:    rgb(30, 30, 30);
  --border:       rgba(255, 255, 255, 0.15);
  --border-strong:rgba(255, 255, 255, 0.28);
  --text:         #f5f3ee;
  --text-muted:   rgba(245, 243, 238, 0.62);
  --text-faint:   rgba(245, 243, 238, 0.38);
  --accent:       oklch(0.82 0.13 80);
  --accent-rgb:   232, 200, 120;
  --accent-soft:  rgba(232, 200, 120, 0.10);
}

/* light theme overrides */
body.theme-light {
  --bg:           #faf8f3;
  --surface-1:    #ffffff;
  --surface-2:    #f5f1e8;
  --border:       rgba(0, 0, 0, 0.08);
  --border-strong:rgba(0, 0, 0, 0.18);
  --text:         #1a1a1a;
  --text-muted:   rgba(26, 26, 26, 0.62);
  --text-faint:   rgba(26, 26, 26, 0.42);
  --accent:       oklch(0.60 0.14 80);
  --accent-rgb:   160, 120, 40;
  --accent-soft:  rgba(160, 120, 40, 0.08);
}

/* ── Base reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-tc);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background 0.25s, color 0.25s;
}
a { color: inherit; }

/* particle canvas in light mode */
body.theme-light #particle-field { display: none !important; }

/* starscape in light mode: soft warm gradient */
body.theme-light .starscape {
  background: radial-gradient(ellipse at 50% 55%,
    rgba(232, 200, 120, 0.22) 0%,
    rgba(232, 200, 120, 0.08) 35%,
    rgba(245, 241, 232, 0.5) 70%,
    #faf8f3 100%
  ) !important;
}
body.theme-light .starscape::before,
body.theme-light .starscape::after { display: none !important; }

/* ── Site wrapper — sits above particle canvas ──────────────────── */
.site {
  position: relative;
  z-index: 1;
  min-height: 100vh;
}

/* ── Layout ─────────────────────────────────────────────────────── */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 56px;
}

/* ── Typography ─────────────────────────────────────────────────── */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
}
.eyebrow-muted {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-faint);
  font-weight: 500;
}
h1, h2, h3, p { margin: 0; }
.h1 {
  font-family: var(--font-tc);
  font-weight: 800;
  font-size: 52px;
  line-height: 1.13;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: pretty;
}
.h2 {
  font-family: var(--font-tc);
  font-weight: 700;
  font-size: 28px;
  line-height: 1.32;
  letter-spacing: -0.005em;
  color: var(--text);
}
.h3 {
  font-family: var(--font-tc);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.4;
  color: var(--text);
}
.body {
  font-family: var(--font-tc);
  font-weight: 300;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-muted);
  margin: 0;
}
.body-sm {
  font-family: var(--font-tc);
  font-weight: 300;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-muted);
  margin: 0;
}
.accent-text { color: var(--accent); }

/* ── Navigation ─────────────────────────────────────────────────── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}
.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}
.nav-link {
  font-family: var(--font-tc);
  font-weight: 400;
  font-size: 14px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s;
}
.nav-link:hover { color: var(--text); }
.nav-link.active { color: var(--accent); }
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-cta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  color: var(--text);
  background: transparent;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.18s, color 0.18s, box-shadow 0.18s;
}
.nav-cta:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 24px rgba(var(--accent-rgb), 0.20);
}

/* Theme toggle button */
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: border-color 0.18s, color 0.18s, background 0.18s;
}
.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

/* ── Logo ───────────────────────────────────────────────────────── */
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}
.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #2a1f0e, #4a3818);
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: #e8c878;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.logo-name {
  font-family: var(--font-tc);
  font-weight: 600;
  font-size: 14px;
  color: var(--text);
}
.logo-sub {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-faint);
  letter-spacing: 0.04em;
}

/* ── Glow cards (Vercel cursor-tracking) ────────────────────────── */
.card {
  position: relative;
  border-radius: 14px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  padding: 36px;
  isolation: isolate;
  overflow: hidden;
  transition: border-color 0.25s;
}
.card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: radial-gradient(
    300px circle at var(--mx, 50%) var(--my, 50%),
    rgba(232, 200, 120, 0.20),
    transparent 55%
  );
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
  z-index: 0;
}
.card::after {
  content: "";
  position: absolute;
  inset: 1px;
  border-radius: 13px;
  background: var(--surface-1);
  z-index: 0;
  transition: background 0.25s;
}
.card > * { position: relative; z-index: 1; }
.card:hover::before { opacity: 1; }
.card:hover { border-color: rgba(232, 200, 120, 0.28); }

/* ── Buttons ────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border: 1px solid transparent;
  font-family: var(--font-tc);
  transition: all 0.18s;
}
.btn-gold-primary {
  padding: 12px 22px;
  border-radius: 10px;
  background: var(--accent);
  color: rgb(20, 16, 8);
  font-weight: 600;
  font-size: 14px;
  border-color: var(--accent);
}
.btn-gold-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.08);
  box-shadow: 0 8px 28px rgba(232, 200, 120, 0.28), 0 0 0 1px rgba(232, 200, 120, 0.4);
}
.btn-ghost {
  padding: 12px 22px;
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  font-weight: 500;
  font-size: 14px;
  border-color: var(--border-strong);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}
.btn-primary {
  padding: 12px 22px;
  border-radius: 10px;
  background: var(--text);
  color: var(--bg);
  font-weight: 600;
  font-size: 14px;
}
.btn-primary:hover { filter: brightness(1.05); transform: translateY(-1px); }

/* ── Starscape hero image ────────────────────────────────────────── */
.starscape {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  background: radial-gradient(
    ellipse at 50% 55%,
    rgba(180, 140, 70, 0.55) 0%,
    rgba(120, 90, 40, 0.25) 30%,
    rgba(20, 14, 6, 0.9) 70%,
    #050402 100%
  );
}
.starscape::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px   1px   at 12% 22%, rgba(255, 240, 200, 0.95), transparent 60%),
    radial-gradient(1px   1px   at 28% 78%, rgba(255, 240, 200, 0.70), transparent 60%),
    radial-gradient(1px   1px   at 47% 35%, rgba(255, 240, 200, 0.85), transparent 60%),
    radial-gradient(1.4px 1.4px at 64% 58%, rgba(255, 240, 200, 0.95), transparent 60%),
    radial-gradient(1px   1px   at 82% 28%, rgba(255, 240, 200, 0.60), transparent 60%),
    radial-gradient(1px   1px   at 88% 72%, rgba(255, 240, 200, 0.80), transparent 60%),
    radial-gradient(1.2px 1.2px at 38% 88%, rgba(255, 240, 200, 0.65), transparent 60%),
    radial-gradient(1px   1px   at 18% 50%, rgba(255, 240, 200, 0.50), transparent 60%),
    radial-gradient(1.6px 1.6px at 72% 18%, rgba(255, 240, 200, 0.85), transparent 60%),
    radial-gradient(1px   1px   at 56% 82%, rgba(255, 240, 200, 0.60), transparent 60%);
}
.starscape::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, transparent 35%, rgba(0, 0, 0, 0.55) 95%);
  pointer-events: none;
}

/* ── Thumbnail placeholder ──────────────────────────────────────── */
.thumb {
  border-radius: 10px;
  background: radial-gradient(
    ellipse at 50% 60%,
    rgba(200, 160, 80, 0.4) 0%,
    rgba(80, 60, 30, 0.2) 40%,
    rgba(10, 8, 4, 0.95) 80%
  );
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
}
.thumb::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px   1px   at 25% 30%, rgba(255, 240, 200, 0.70), transparent 60%),
    radial-gradient(1.2px 1.2px at 60% 65%, rgba(255, 240, 200, 0.85), transparent 60%),
    radial-gradient(1px   1px   at 80% 35%, rgba(255, 240, 200, 0.50), transparent 60%),
    radial-gradient(1.4px 1.4px at 40% 75%, rgba(255, 240, 200, 0.70), transparent 60%);
}

/* ── Article rows ───────────────────────────────────────────────── */
.row-wrap { border-bottom: 1px solid var(--border); }
.row {
  position: relative;
  display: grid;
  grid-template-columns: 140px 1fr 110px;
  gap: 32px;
  padding: 28px 24px;
  align-items: baseline;
  border-radius: 10px;
  margin: 4px 0;
  transition: background 0.25s;
}
.row:hover {
  background:
    radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%),
      rgba(232, 200, 120, 0.08), transparent 60%),
    linear-gradient(180deg, rgba(232, 200, 120, 0.025), transparent);
}
.row .cat {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}
.row .row-title {
  font-family: var(--font-tc);
  font-weight: 600;
  font-size: 19px;
  line-height: 1.45;
  color: var(--text);
  margin: 0 0 6px;
  transition: color 0.18s;
}
.row:hover .row-title { color: var(--accent); }
.row .row-date {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-faint);
  text-align: right;
}

/* ── Stats ──────────────────────────────────────────────────────── */
.stat-num {
  font-family: var(--font-tc);
  font-weight: 900;
  font-size: 36px;
  line-height: 1;
  color: var(--text);
  letter-spacing: -0.02em;
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-top: 8px;
}

/* ── Grid layouts ───────────────────────────────────────────────── */
.three-col { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.two-col   { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

/* ── Main footer ────────────────────────────────────────────────── */
.footer-grid {
  border-top: 1px solid var(--border);
  padding: 72px 0 56px;
  display: grid;
  grid-template-columns: 2.2fr 1.1fr 1.1fr 0.9fr;
  gap: 48px;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-faint);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}
.footer-col { display: flex; flex-direction: column; gap: 12px; }
.footer-col .eyebrow-muted { margin-bottom: 4px; }
.footer-input {
  flex: 1;
  padding: 0 14px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text);
  font-family: var(--font-tc);
  font-size: 13px;
  outline: none;
  transition: border-color 0.18s;
}
.footer-input:focus { border-color: var(--accent); }
.footer-subscribe { display: flex; gap: 8px; max-width: 340px; }
.footer-subscribe-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 18px;
  border-radius: 8px;
  background: var(--accent);
  color: rgb(20, 16, 8);
  font-family: var(--font-tc);
  font-weight: 600;
  font-size: 13px;
  border: 1px solid var(--accent);
  transition: filter 0.18s, box-shadow 0.25s;
  white-space: nowrap;
}
.footer-subscribe-btn:hover {
  filter: brightness(1.08);
  box-shadow: 0 4px 16px rgba(232, 200, 120, 0.25);
}

/* ── Sub-page simple footer ─────────────────────────────────────── */
.sub-footer {
  border-top: 1px solid var(--border);
  padding: 56px 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-tc);
  font-size: 13px;
  color: var(--text-faint);
}
.sub-footer-links {
  display: flex;
  gap: 28px;
}
.sub-footer-links a {
  text-decoration: none;
  color: var(--text-muted);
  transition: color 0.15s;
}
.sub-footer-links a:hover { color: var(--text); }

/* ── HR divider ─────────────────────────────────────────────────── */
.hr-faint { height: 1px; background: var(--border); border: 0; margin: 0; }

/* ── Pulse animation ────────────────────────────────────────────── */
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.85); }
}
.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s ease-in-out infinite;
  display: inline-block;
  flex-shrink: 0;
}

/* ── Reading progress bar ───────────────────────────────────────── */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, oklch(0.82 0.13 80), oklch(0.86 0.13 90));
  box-shadow: 0 0 8px oklch(0.82 0.13 80);
  z-index: 9998;
  transition: width 0.12s linear;
  pointer-events: none;
}

/* ── Custom gold cursor (desktop only) ──────────────────────────── */
@media (hover: hover) and (pointer: fine) {
  * { cursor: none !important; }
  input, textarea, select { cursor: text !important; }
}
.gold-cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 16px;
  height: 16px;
  border: 1.5px solid oklch(0.82 0.13 80);
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
  transition: width 0.15s, height 0.15s, border-color 0.15s, background 0.15s, opacity 0.2s;
  z-index: 9999;
  mix-blend-mode: difference;
}
.gold-cursor.is-hover {
  width: 36px;
  height: 36px;
  background: rgba(232, 200, 120, 0.12);
  border-color: oklch(0.86 0.15 80);
}
.gold-cursor-dot {
  position: fixed;
  top: 0;
  left: 0;
  width: 4px;
  height: 4px;
  background: oklch(0.86 0.15 80);
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
  z-index: 10000;
  transition: opacity 0.2s;
}

/* ── Keyboard shortcut overlay ──────────────────────────────────── */
.kbd-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  z-index: 10001;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
}
.kbd-panel {
  background: rgb(15, 15, 15);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  padding: 36px 44px;
  min-width: 420px;
  color: #f5f3ee;
  font-family: var(--font-tc);
}
.kbd-panel .panel-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: oklch(0.82 0.13 80);
  margin-bottom: 20px;
  text-transform: uppercase;
}
.kbd-row {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 14px;
  font-weight: 300;
}
.kbd-row:last-child { border-bottom: none; }
.kbd-key {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  font-family: var(--font-mono);
  font-size: 12px;
  color: oklch(0.82 0.13 80);
  margin-left: 6px;
}
.kbd-hint-btn {
  position: fixed;
  bottom: 24px;
  left: 24px;
  z-index: 100;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: oklch(0.82 0.13 80);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  backdrop-filter: blur(8px);
  transition: background 0.18s, border-color 0.18s;
}
.kbd-hint-btn:hover {
  background: rgba(232, 200, 120, 0.10);
  border-color: oklch(0.82 0.13 80);
}

/* ── Sitemap-specific ───────────────────────────────────────────── */
.signal {
  padding: 48px 0;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 80px;
}
.signal:first-child { border-top: none; padding-top: 16px; }
.signal-meta { display: flex; flex-direction: column; gap: 12px; }
.signal-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--text-faint);
  text-transform: uppercase;
}
.signal-title {
  font-family: var(--font-tc);
  font-weight: 700;
  font-size: 28px;
  line-height: 1.3;
  margin: 0;
  color: var(--text);
}
.signal-desc {
  font-family: var(--font-tc);
  font-weight: 300;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-muted);
  margin: 4px 0 0;
}
.signal-stats {
  display: flex;
  gap: 32px;
  margin-top: 24px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: 0.08em;
}
.signal-stats strong { color: var(--accent); font-weight: 500; }
.anchor-list { display: flex; flex-direction: column; gap: 2px; }
.anchor {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 14px 16px;
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
  transition: background 0.2s;
  border-bottom: 1px solid var(--border);
}
.anchor:last-child { border-bottom: none; }
.anchor:hover { background: linear-gradient(90deg, rgba(232, 200, 120, 0.06), transparent); }
.anchor-title {
  font-family: var(--font-tc);
  font-weight: 500;
  font-size: 15px;
  color: var(--text);
  transition: color 0.18s;
}
.anchor:hover .anchor-title { color: var(--accent); }
.anchor-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: 0.06em;
  white-space: nowrap;
  margin-left: 24px;
}
.map-legend {
  margin-top: 96px;
  padding: 40px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface-1);
}

/* ── AI Notes tag pills ─────────────────────────────────────────── */
.tag-pill {
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: transparent;
  font-family: var(--font-tc);
  font-size: 13px;
  transition: all 0.18s;
  white-space: nowrap;
}
.tag-pill:hover,
.tag-pill.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

/* ── Utility ────────────────────────────────────────────────────── */
.flex  { display: flex; }
.col   { display: flex; flex-direction: column; }
.gap-8  { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }
.gap-32 { gap: 32px; }
.gap-48 { gap: 48px; }
.mt-8   { margin-top: 8px; }
.mt-12  { margin-top: 12px; }
.mt-16  { margin-top: 16px; }
.mt-24  { margin-top: 24px; }
.mt-32  { margin-top: 32px; }
.mt-48  { margin-top: 48px; }
.mt-64  { margin-top: 64px; }
.mt-80  { margin-top: 80px; }

/* ── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .container { padding: 0 24px; }
  .h1 { font-size: 36px; }
  .three-col { grid-template-columns: 1fr; }
  .two-col   { grid-template-columns: 1fr; }
  .row { grid-template-columns: 1fr; gap: 8px; }
  .row .row-date { text-align: left; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .signal { grid-template-columns: 1fr; gap: 32px; }
  .nav-links { display: none; }
}