/* ============================================
   DESIGN TOKENS
   ============================================ */
:root {
  --color-amber: #f59e0b;
  --color-red: #ef4444;
  --gradient-primary: linear-gradient(to right, #f59e0b, #ef4444);
  --gradient-hover: linear-gradient(to right, #ea580c, #dc2626);
  --color-bg: #f8fafc;
  --color-bg-white: #ffffff;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;
  --color-border: #e2e8f0;
  --color-amber-bg: rgba(245, 158, 11, 0.08);
  --color-info-bg: #fef3c7;
  --color-info-border: #fbbf24;
  --color-success: #22c55e;

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --container-max: 1160px;
  --container-padding: 24px;
  --header-height: 68px;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 999px;

  --ease: cubic-bezier(.16, 1, .3, 1);
  --transition-fast: 150ms var(--ease);
  --transition: 300ms var(--ease);
}

/* ============================================
   RESET
   ============================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--color-amber); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: #d97706; }
ul, ol { list-style: none; }

/* ============================================
   LAYOUT
   ============================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: 96px 0;
}

.section-sm {
  padding: 64px 0;
}

.text-center { text-align: center; }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1 { font-size: 3rem; font-weight: 800; line-height: 1.15; letter-spacing: -0.02em; color: var(--color-text); }
h2 { font-size: 2rem; font-weight: 700; line-height: 1.25; letter-spacing: -0.01em; color: var(--color-text); }
h3 { font-size: 1.25rem; font-weight: 600; line-height: 1.4; color: var(--color-text); }
h4 { font-size: 0.875rem; font-weight: 600; line-height: 1.5; color: var(--color-text-secondary); text-transform: uppercase; letter-spacing: 0.05em; }
p { color: var(--color-text-secondary); line-height: 1.7; }
p + p { margin-top: 16px; }

.lead {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* Gradient text */
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   GRID
   ============================================ */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ============================================
   UTILITIES
   ============================================ */
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.mt-12 { margin-top: 48px; }
.mt-16 { margin-top: 64px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mb-8 { margin-bottom: 32px; }
.gap-8 { gap: 32px; }
.gap-12 { gap: 48px; }

/* ============================================
   DARK THEME
   ============================================ */
.logo-dark { display: none !important; }
.logo-light { display: block; }

[data-theme="dark"] {
  --color-bg: #0f1419;
  --color-bg-white: #1a2029;
  --color-text: #e2e8f0;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --color-border: #2d3748;
  --color-amber-bg: rgba(245, 158, 11, 0.12);
  --color-info-bg: rgba(251, 191, 36, 0.1);
  --color-info-border: #b45309;
}
[data-theme="dark"] a:hover { color: #fbbf24; }
[data-theme="dark"] .logo-light { display: none !important; }
[data-theme="dark"] .logo-dark { display: block !important; }

/* Theme toggle button */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-bg-white);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.theme-toggle:hover {
  color: var(--color-amber);
  border-color: var(--color-amber);
}
.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }

/* Mobile theme toggle */
.theme-toggle-mobile {
  width: 100%;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
}
.theme-label-light { display: none; }
[data-theme="dark"] .theme-label-dark { display: none; }
[data-theme="dark"] .theme-label-light { display: inline; }

/* Dark mode overrides for specific components */
[data-theme="dark"] .site-header.scrolled {
  background: rgba(15, 20, 25, 0.95);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}
[data-theme="dark"] .mobile-drawer {
  background: #1a2029;
  border-color: var(--color-border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}
[data-theme="dark"] .blog-card-img {
  background-color: #1a2029;
}
[data-theme="dark"] .cta-section h2 { color: #fff; }
[data-theme="dark"] .cta-section p { color: rgba(255, 255, 255, 0.8); }
[data-theme="dark"] .btn-white { color: #1e293b; }
[data-theme="dark"] .btn-white:hover { color: #1e293b; }