/* Word in Scene — shared design tokens & primitives */
:root {
  --blue: #2563eb;
  --blue-d: #1d4ed8;
  --blue-soft: rgba(37, 99, 235, 0.12);
  --purple: #7c3aed;
  --purple-soft: rgba(124, 58, 237, 0.12);
  --green: #059669;
  --red: #dc2626;
  --amber: #d97706;
  --ink: #0f172a;
  --ink-2: #334155;
  --muted: #64748b;
  --line: #e2e8f0;
  --line-2: #cbd5e1;
  --bg: #f1f5f9;
  --card: #ffffff;
  --panel: var(--card);
  --border: var(--line);
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 24px 48px rgba(15, 23, 42, 0.12);
  --radius: 20px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --glass: rgba(255, 255, 255, 0.82);
  --glass-border: rgba(255, 255, 255, 0.65);
  --topbar-h: auto;
}

*, *::before, *::after { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100%;
  color: var(--ink);
  font-family: var(--font);
  background:
    radial-gradient(900px 520px at 85% -8%, rgba(124, 58, 237, 0.08) 0%, transparent 55%),
    radial-gradient(1000px 600px at 15% -12%, rgba(37, 99, 235, 0.12) 0%, transparent 58%),
    var(--bg);
}

.hidden { display: none !important; }

/* Shared buttons & chips */
.site-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-2);
  border-radius: var(--radius-pill);
  padding: 8px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s, background 0.15s, transform 0.12s;
}

.site-btn:hover {
  border-color: var(--blue);
  color: var(--blue);
}

.site-btn:active { transform: scale(0.98); }

.site-btn-primary {
  background: linear-gradient(135deg, var(--blue), #3b82f6);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.28);
}

.site-btn-primary:hover {
  color: #fff;
  filter: brightness(1.04);
}

.site-icon-btn {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-2);
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  cursor: pointer;
  text-decoration: none;
  transition: border-color 0.15s, background 0.15s, transform 0.12s;
  flex-shrink: 0;
}

.site-icon-btn:hover {
  border-color: var(--blue);
  background: var(--blue-soft);
  color: var(--blue);
}

.site-chip {
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--muted);
  border-radius: var(--radius-pill);
  padding: 5px 12px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.site-chip:hover {
  border-color: var(--line-2);
  color: var(--ink-2);
}

.site-chip.is-on {
  color: var(--blue);
  border-color: rgba(37, 99, 235, 0.35);
  background: var(--blue-soft);
}

.site-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.site-eyebrow {
  margin: 0 0 8px;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
}

.site-glass-bar {
  background: var(--glass);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 1px solid var(--line);
}

/* Soft CTA for anonymous visitors — register to save progress */
.guest-cta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 10px 14px;
  background: linear-gradient(90deg, #eff6ff, #f0fdf4);
  border-bottom: 1px solid var(--line);
  color: var(--ink-2);
  font-size: 0.88rem;
  line-height: 1.4;
}
.guest-cta.hidden { display: none !important; }
.guest-cta-text {
  margin: 0;
  flex: 1 1 200px;
  min-width: 0;
}
.guest-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  font-size: 0.84rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  white-space: nowrap;
}
.guest-cta-btn:hover { background: var(--blue-d); }
.guest-cta-dismiss {
  flex: 0 0 auto;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 1.25rem;
  line-height: 1;
  padding: 4px 8px;
  cursor: pointer;
  border-radius: 8px;
}
.guest-cta-dismiss:hover { background: rgba(15, 23, 42, 0.06); color: var(--ink); }