/* TechReview Hub - Main Stylesheet */
:root {
  --primary: #0a4d4e;
  --primary-light: #0d6d6f;
  --secondary: #d97706;
  --accent: #f59e0b;
  --dark: #1a1a1a;
  --gray-900: #2d2d2d;
  --gray-700: #4a4a4a;
  --gray-500: #6b7280;
  --gray-300: #d1d5db;
  --gray-100: #f3f4f6;
  --white: #ffffff;
  --font-display: 'Playfair Display', serif;
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
  --border-radius: 12px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-body); line-height: 1.7; color: var(--gray-900); }
h1, h2, h3 { font-family: var(--font-heading); font-weight: 700; color: var(--dark); }
h1 { font-size: clamp(2.5rem, 5vw, 4rem); font-family: var(--font-display); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
.header { position: sticky; top: 0; z-index: 1000; background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); border-bottom: 1px solid var(--gray-300); }
.navbar { max-width: 1400px; margin: 0 auto; padding: 1.25rem 2rem; display: flex; justify-content: space-between; align-items: center; }
.logo { font-family: var(--font-display); font-size: 1.75rem; font-weight: 800; color: var(--primary); }
.nav-menu { display: flex; gap: 2.5rem; list-style: none; }
.nav-link { font-weight: 500; color: var(--gray-700); transition: color 0.3s; }
.nav-link:hover { color: var(--primary); }
.hero { padding: 4rem 2rem; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); color: white; }
.container { max-width: 1400px; margin: 0 auto; padding: 0 2rem; }
.section { padding: 4rem 0; }
.grid { display: grid; gap: 2.5rem; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.card { background: white; border-radius: var(--border-radius); box-shadow: var(--shadow-sm); overflow: hidden; transition: transform 0.3s; }
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.card-content { padding: 1.5rem; }
.btn { display: inline-block; padding: 1rem 2rem; font-weight: 600; border-radius: var(--border-radius); transition: all 0.3s; }
.btn-primary { background: var(--secondary); color: white; }
.btn-primary:hover { background: var(--accent); transform: translateY(-2px); }
.footer { background: var(--dark); color: var(--gray-300); padding: 4rem 0 2rem; }
.footer-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; max-width: 1400px; margin: 0 auto; padding: 0 2rem; }
.mobile-menu-toggle { display: none; }
@media (max-width: 768px) {
  .nav-menu { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: white; padding: 1rem; }
  .nav-menu.active { display: flex; }
  .mobile-menu-toggle { display: block; background: none; border: none; font-size: 1.5rem; cursor: pointer; }
}