/* ═══════════════════════════════════════════
   Stargety Design System — CSS Custom Properties
   Glass Frost aesthetic
   Source: DESIGN.md
   ═══════════════════════════════════════════ */

/* ─── Inter Font ─── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* ─── Dark Mode (default) ─── */
:root,
[data-theme="dark"] {
  --color-background: #0b1120;
  --color-foreground: #eef3fa;
  --color-primary: #b2dd4c;
  --color-primary-foreground: #0b1120;
  --color-accent: #b2dd4c;
  --color-accent-foreground: #0b1120;
  --color-muted: #1a2332;
  --color-muted-foreground: #7b89a0;
  --color-border: #2a3444;
  --color-ring: #b2dd4c;
  --color-destructive: #e74c4c;
  --color-destructive-foreground: #ffffff;

  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-bg-card: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.06);
  --glass-blur: blur(20px);
  --glass-blur-sm: blur(14px);

  --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 8px 28px rgba(178, 221, 76, 0.35);
}

/* ─── Light Mode ─── */
[data-theme="light"] {
  --color-background: #eef3fa;
  --color-foreground: #0b1120;
  --color-primary: #0b1120;
  --color-primary-foreground: #eef3fa;
  --color-accent: #b2dd4c;
  --color-accent-foreground: #0b1120;
  --color-muted: #f0f4f9;
  --color-muted-foreground: #6b7a93;
  --color-border: #dce3ed;
  --color-ring: #b2dd4c;
  --color-destructive: #e74c4c;
  --color-destructive-foreground: #ffffff;

  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-bg-card: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(0, 0, 0, 0.06);
  --glass-blur: blur(20px);
  --glass-blur-sm: blur(14px);

  --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 8px 28px rgba(178, 221, 76, 0.25);
}

/* ─── Typography Tokens ─── */
:root {
  --font-sans: 'Inter', system-ui, sans-serif;

  --text-display-size: 3.8rem;
  --text-display-weight: 800;
  --text-display-lineheight: 1.05;
  --text-display-tracking: -0.03em;

  --text-heading-size: 1.8rem;
  --text-heading-weight: 700;
  --text-heading-lineheight: 1.2;
  --text-heading-tracking: -0.02em;

  --text-subheading-size: 1.25rem;
  --text-subheading-weight: 600;
  --text-subheading-lineheight: 1.3;

  --text-body-size: 1rem;
  --text-body-weight: 400;
  --text-body-lineheight: 1.6;

  --text-body-small-size: 0.875rem;
  --text-body-small-weight: 400;
  --text-body-small-lineheight: 1.5;

  --text-caption-size: 0.75rem;
  --text-caption-weight: 500;
  --text-caption-lineheight: 1.4;
  --text-caption-tracking: 0.01em;

  --text-tagline-size: 0.75rem;
  --text-tagline-weight: 600;
  --text-tagline-tracking: 0.08em;
  --text-tagline-transform: uppercase;
}

/* ─── Spacing & Layout ─── */
:root {
  --section-spacing: 6rem;
  --container-max: 1200px;
  --nav-margin-top: 1.5rem;
}

/* ─── Border Radius ─── */
:root {
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  --radius-nav: 60px;
}

/* ═══════════════════════════════════════════
   Glass Component Classes
   ═══════════════════════════════════════════ */

/* ─── Glass Container (base) ─── */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
}

/* ─── Glass Card ─── */
.glass-card {
  background: var(--glass-bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  transition: transform 300ms ease, border-color 300ms ease;
}
.glass-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
}

/* ─── Glass Nav ─── */
.glass-nav {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-nav);
  padding: 1rem 3rem;
  position: sticky;
  top: var(--nav-margin-top);
  z-index: 50;
}

/* ─── Glass Chip (pill) ─── */
.glass-chip {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  padding: 0.6rem 1.4rem;
}

/* ─── Button Primary ─── */
.btn-primary {
  background: var(--color-accent);
  color: var(--color-accent-foreground);
  border-radius: var(--radius-full);
  padding: 0.9rem 2.6rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: transform 300ms ease, box-shadow 300ms ease;
}
.btn-primary:hover {
  background: #c5e86a;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* ─── Button Secondary ─── */
.btn-secondary {
  background: var(--glass-bg);
  color: var(--color-foreground);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  padding: 0.9rem 2.6rem;
  font-weight: 600;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  cursor: pointer;
  transition: transform 300ms ease, border-color 300ms ease;
}
.btn-secondary:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent);
}

/* ─── Tagline Badge ─── */
.tagline-badge {
  background: rgba(178, 221, 76, 0.10);
  color: var(--color-accent);
  border: 1px solid rgba(178, 221, 76, 0.12);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.4rem 1rem;
  display: inline-block;
}

/* ─── Responsive Breakpoints ─── */
/* Desktop: > 1024px (default) */
/* Tablet: 768px – 1024px */
/* Mobile: < 768px */
/* Small mobile: < 480px */

/* ─── Fallback for devices without backdrop-filter ─── */
@supports not (backdrop-filter: blur(1px)) {
  .glass,
  .glass-card,
  .glass-nav,
  .glass-chip,
  .btn-secondary {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: var(--color-muted);
  }
}

/* ─── Reduced Motion ─── */
@media (prefers-reduced-motion: reduce) {
  .glass-card:hover,
  .btn-primary:hover,
  .btn-secondary:hover {
    transform: none;
  }
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}