/* TiltCheck Base Styles: brand tokens & utilities */
:root {
  --color-bg: #0E0E0F;
  --color-surface-0: #111316;
  --color-surface-1: #151920;
  --color-surface-2: #1A1F24;
  --color-border: #1F2937;
  --color-accent: #00FFC6;
  --color-accent-alt: #00C2FF;
  --color-danger: #FF5252;
  --color-text: #ffffff;
  --color-text-secondary: #B8C4CE;
  --color-text-muted: #6B7280;
  --gradient-hero: linear-gradient(180deg, #0E0E0F 0%, #111316 100%);

  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', Arial, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.5);

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
}

html { background: var(--color-bg); color: var(--color-text); font-family: var(--font-sans); }
body { margin:0; }

/* Breadcrumb & navbar link accessible contrast */
.breadcrumbs a,
.navbar .nav-links a,
.navbar a.logo {
  color: #f2f2ff; /* passes 4.5:1 against dark bg */
  text-decoration: none;
}
.breadcrumbs a:hover,
.navbar .nav-links a:hover,
.navbar a.logo:hover { color: var(--color-accent); }

/* Navigation focus accessibility */
.navbar .nav-links a,
header nav a { position:relative; }
.navbar .nav-links a:focus-visible,
header nav a:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 0 4px rgba(0,212,170,0.30), 0 4px 18px rgba(0,212,170,0.25);
}
@media (prefers-reduced-motion: reduce) {
  .navbar .nav-links a:focus-visible,
  header nav a:focus-visible { box-shadow: 0 0 0 4px rgba(0,212,170,0.35); }
}

/* Typography helpers */
.lede { font-size: 1.15rem; line-height: 1.8; color: var(--color-text-secondary); }
.lede-accent { font-size: 1.3rem; line-height: 1.8; font-weight:600; color: var(--color-accent); }
.heading-accent { color: var(--color-accent); }
.text-muted { color: var(--color-text-muted); }

/* Layout utilities */
.section { padding: var(--space-6) var(--space-4); }
.section-tight { padding: var(--space-5) var(--space-4); }

/* Card styles */
.card { background: var(--color-surface-2); border:1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-5); }
.card-accent { border-left:4px solid var(--color-accent); }

/* Alert / emphasis boxes */
.alert-danger { background:#2a1a1a; border:2px solid var(--color-danger); border-radius: var(--radius-md); padding: var(--space-5); }
.box-accent { background: var(--color-surface-2); border-left:4px solid var(--color-accent); padding: var(--space-4); border-radius: var(--radius-sm); }

/* Hero */
.hero-gradient { background: var(--gradient-hero); }

/* Buttons */
.button, .cta-button { display:inline-block; background: var(--color-accent); color:#000; padding: var(--space-3) var(--space-5); border-radius: var(--radius-sm); text-decoration:none; font-weight:600; }
.button:hover, .cta-button:hover { background: var(--color-accent-alt); }

/* Gauge placeholders (for dashboard integration) */
.gauge { display:flex; flex-direction:column; align-items:center; gap: var(--space-2); }
.gauge-label { font-size:0.85rem; text-transform:uppercase; letter-spacing:0.05em; color: var(--color-text-muted); }
.gauge-value { font-size:1.4rem; font-weight:600; }
.gauge-ring { width:120px; height:120px; position:relative; }
.gauge-ring svg { width:100%; height:100%; }
.gauge-bar { width:100%; height:14px; background: var(--color-surface-1); border-radius: var(--radius-sm); overflow:hidden; }
.gauge-bar-fill { height:100%; background: var(--color-accent); width:0; transition:width 0.6s ease; }

/* Footer */
footer { background: var(--color-bg); padding: var(--space-6) var(--space-4); text-align:center; border-top:1px solid var(--color-border); }
footer p { color: #999; margin-bottom: var(--space-2); }
footer a { color: var(--color-accent); text-decoration:none; margin:0 var(--space-2); }
footer a:hover { text-decoration:underline; }
.footer a:focus-visible, footer a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 0 3px rgba(0,212,170,0.35);
  text-decoration: none;
}
.built-by { margin-top: var(--space-4); font-size:0.9rem; color: #999; }

/* Responsive */
@media (max-width: 720px) {
  .lede-accent { font-size:1.15rem; }
  .gauge-ring { width:100px; height:100px; }
}

/* High-contrast theme variant (manual toggle via .theme-hc or user pref) */
.theme-hc {
  --color-bg: #000000;
  --color-surface-0: #0A0A0A;
  --color-surface-1: #0E0E0F;
  --color-surface-2: #111316;
  --color-border: #374151;
  --color-text: #ffffff;
  --color-text-secondary: #E5E7EB;
  --color-text-muted: #9CA3AF;
  --color-accent: #00FFD4;
  --color-accent-alt: #33D6FF;
  --gradient-hero: linear-gradient(180deg,#000000,#0E0E0F 100%);
}

@media (prefers-contrast: more) {
  :root {
    --color-bg: #000;
    --color-surface-0: #0A0A0A;
    --color-surface-1: #0E0E0F;
    --color-surface-2: #111316;
    --color-border: #374151;
    --color-text: #ffffff;
    --color-text-secondary: #E5E7EB;
    --color-text-muted: #9CA3AF;
    --color-accent: #00FFD4;
    --color-accent-alt: #33D6FF;
  }
  .card, .box-accent, footer, .navbar, header, .philosophy-card {
    box-shadow: 0 0 0 1px #374151, 0 0 0 3px rgba(0,255,198,0.1);
  }
  a:focus-visible { outline-width: 3px; }
}