/* ============================================
   AS Online Services | Shared design tokens
   Single source for colour / radius / type / shadow
   ============================================ */

:root {
  /* Colour */
  --color-bg: #0a0a0f;
  --color-bg-alt: #111118;
  --color-surface: #16161f;
  --color-surface-2: #1e1e2a;
  --color-border: #2a2a3a;
  --color-text: #e4e4ef;
  --color-text-dim: #a8a8be;
  --color-text-muted: #9b9bb4;
  --color-white: #ffffff;

  --color-primary: #6c5ce7;
  --color-primary-light: #a29bfe;
  --color-accent: #00cec9;
  --color-accent-2: #fd79a8;
  --color-gold: #d4af37;
  --color-gold-light: #f4d03f;
  --color-gold-dark: #b8860b;

  --color-green: #2ecc71;
  --color-red: #e74c3c;
  --color-orange: #e67e22;
  --color-yellow: #fdcb6e;

  --gradient-primary: linear-gradient(135deg, #6c5ce7, #5b4cdb);
  --gradient-gold: linear-gradient(135deg, #d4af37, #f4d03f, #b8860b);
  --gradient-glow: none;
  --gradient-text: none;

  /* Type */
  --font-sans: 'Inter', 'Segoe UI', Roboto, 'Noto Sans', 'Liberation Sans', 'DejaVu Sans', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Liberation Mono', 'DejaVu Sans Mono', Consolas, monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: clamp(1.75rem, 4vw, 2.5rem);

  /* Radius / shadow / motion */
  --radius-sm: 0.5rem;
  --radius-md: 0.875rem;
  --radius-lg: 1.25rem;
  --radius-xl: 1.75rem;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
  --shadow-glow: none;

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container-max: 1200px;
  --section-gap: 4.5rem;

  /* Aliases used by get-certified / verify page CSS */
  --gold: var(--color-gold);
  --gold-light: var(--color-gold-light);
  --gold-dark: var(--color-gold-dark);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -100px;
  z-index: 10000;
  padding: 0.65rem 1.1rem;
  background: var(--color-accent);
  color: var(--color-bg);
  font-weight: 700;
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: top 0.15s ease;
}
.skip-link:focus {
  top: 0.75rem;
  outline: 3px solid var(--color-white);
  outline-offset: 2px;
  color: var(--color-bg);
}

/* ---------- Focus rings ---------- */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--color-primary-light);
  outline-offset: 3px;
}
.btn:focus-visible,
a.btn:focus-visible,
button:focus-visible,
.nav-links a:focus-visible,
.nav-links button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary-light);
  outline-offset: 3px;
}

/* ---------- Shared buttons (site-wide) ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.925rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  text-decoration: none;
  color: inherit;
}
.btn-lg { padding: 0.95rem 2rem; font-size: var(--text-base); }
.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: none;
}
.btn-primary:hover {
  background: #5b4cdb;
  transform: translateY(-1px);
  color: var(--color-white);
}
.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}
.btn-outline:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary-light);
  transform: translateY(-2px);
}
.btn-gold,
.btn-accent-gold {
  background: var(--gradient-gold);
  color: #1a1a2e;
  font-weight: 700;
  border: none;
}
.btn-gold:hover,
.btn-accent-gold:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
  color: #1a1a2e;
}
.btn-outline-gold {
  background: transparent;
  color: var(--color-gold);
  border: 1.5px solid var(--color-gold);
}
.btn-outline-gold:hover {
  background: rgba(212, 175, 55, 0.12);
  color: var(--color-gold-light);
  border-color: var(--color-gold-light);
}
.btn-nav {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 0.55rem 1.25rem;
  font-size: 0.85rem;
}
.btn-nav:hover {
  background: #5b4cdb;
  color: var(--color-white);
}
.nav-accent-gold {
  color: var(--color-gold) !important;
}
.nav-accent-gold:hover {
  color: var(--color-gold-light) !important;
}

/* ---------- Shared card ---------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}