/* ============================================
   RelyOnAI — Design System & Global Styles
   ============================================ */

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

/* ── Custom Properties ── */
:root {
  /* Colors */
  --color-bg: #050A15;
  --color-bg-secondary: #080E1C;
  --color-surface: #0A1020;
  --color-surface-2: #0F1929;
  --color-border: rgba(255, 255, 255, 0.07);
  --color-border-hover: rgba(99, 179, 237, 0.3);

  --color-primary: #2563EB;
  --color-primary-light: #3B82F6;
  --color-primary-glow: rgba(37, 99, 235, 0.25);

  --color-accent: #06B6D4;
  --color-accent-light: #22D3EE;
  --color-accent-glow: rgba(6, 182, 212, 0.2);
  
  --color-snowflake: #29B5E8;
  --color-snowflake-glow: rgba(41, 181, 232, 0.25);

  --color-indigo: #818CF8;
  --color-gold: #F59E0B;
  --color-success: #10B981;

  --color-text-primary: #F1F5F9;
  --color-text-secondary: #94A3B8;
  --color-text-muted: #64748B;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-2xl: 1.75rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.6);
  --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.7);
  --shadow-glow-blue: 0 0 40px rgba(37, 99, 235, 0.3);
  --shadow-glow-cyan: 0 0 40px rgba(6, 182, 212, 0.25);

  /* Layout */
  --container-max: 1200px;
  --nav-height: 76px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 260ms ease;
  --transition-slow: 420ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.65;
  overflow-x: hidden;
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.18;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--color-text-primary);
}

p {
  color: var(--color-text-secondary);
  line-height: 1.75;
}

a {
  color: inherit;
  text-decoration: none;
}

img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: var(--font-sans); }
input, textarea, select { font-family: var(--font-sans); }

/* ── Layout ── */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section         { padding: var(--space-24) 0; }
.section--lg     { padding: var(--space-32) 0; }
.section--sm     { padding: var(--space-16) 0; }
.section--alt    { background: var(--color-surface); }

/* ── Grid ── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6); }

/* ── Text Utilities ── */
.text-center { text-align: center; }
.text-left   { text-align: left; }

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-warm {
  background: linear-gradient(135deg, #F59E0B 0%, #FCD34D 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-accent  { color: var(--color-accent); }
.text-snowflake { color: var(--color-snowflake); }
.text-muted   { color: var(--color-text-muted); }
.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }

/* ── Eyebrow ── */
.eyebrow {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}
.eyebrow::before {
  content: '';
  display: inline-block;
  width: 28px;
  height: 2px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

/* ── Section Header ── */
.section-header { margin-bottom: var(--space-12); }
.section-header--center {
  text-align: center;
  max-width: 760px;
  margin: 0 auto var(--space-12);
}
.section-header h2 { margin-bottom: var(--space-4); }
.section-header p { font-size: 1.0625rem; max-width: 620px; }
.section-header--center p { margin: 0 auto; }

/* ── Mono Tag ── */
.mono-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  opacity: 0.8;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 { grid-template-columns: 1fr; }
  .section     { padding: var(--space-16) 0; }
  .section--lg { padding: var(--space-20) 0; }
  .container   { padding: 0 var(--space-5); }
  h2 { font-size: clamp(1.6rem, 6vw, 2.25rem); }
}