* { margin: 0; padding: 0; box-sizing: border-box; }
:root { --primary: #0ea5e9; --secondary: #06b6d4; --dark: #0f172a; --light: #f1f5f9; --accent: #f59e0b; --success: #10b981; --shadow: 0 4px 6px rgba(0,0,0,0.1); }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: var(--dark); line-height: 1.6; min-height: 100vh; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 1rem; }
header { background: linear-gradient(135deg, var(--primary), var(--secondary)); color: white; padding: 2rem 0; text-align: center; box-shadow: var(--shadow); animation: slideDown 0.5s ease-out; }
@keyframes slideDown { from { transform: translateY(-100%); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
header h1 { font-size: 2rem; margin-bottom: 0.5rem; text-shadow: 2px 2px 4px rgba(0,0,0,0.2); }
.subtitle { font-size: 1rem; opacity: 0.9; }
.filter-nav { background: white; padding: 1rem 0; box-shadow: var(--shadow); position: sticky; top: 0; z-index: 100; animation: fadeIn 0.6s ease-out; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.filter-nav .container { display: flex; gap: 0.5rem; overflow-x: auto; padding-bottom: 0.5rem; }
.filter-btn { padding: 0.6rem 1.2rem; border: 2px solid var(--primary); background: white; color: var(--primary); border-radius: 2rem; font-weight: 600; cursor: pointer; transition: all 0.3s; white-space: nowrap; }
.filter-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 8px rgba(14, 165, 233, 0.3); }
.filter-btn.active { background: var(--primary); color: white; }
main { padding: 2rem 0; }
.card { background: white; border-radius: 1rem; padding: 1.5rem; margin-bottom: 1.5rem; box-shadow: var(--shadow); animation: fadeInUp 0.6s ease-out; }
@keyframes fadeInUp { from { transform: translateY(30px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
h2 { color: var(--dark); margin-bottom: 1rem; font-size: 1.5rem; }
.info-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
@media (min-width: 768px) { .info-grid { grid-template-columns: repeat(3, 1fr); } }
.info-item { text-align: center; padding: 1rem; border-radius: 0.5rem; background: var(--light); transition: transform 0.3s; }
.info-item:hover { transform: scale(1.05); }
.icon { font-size: 3rem; display: block; margin-bottom: 0.5rem; }
.info-item h3 { font-size: 1rem; margin: 0.5rem 0; color: var(--primary); }
.models-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
@media (min-width: 768px) { .models-grid { grid-template-columns: repeat(2, 1fr); } }
.model-card { background: white; border: 2px solid var(--light); border-radius: 1rem; padding: 1.2rem; transition: all 0.3s; animation: fadeInUp 0.6s ease-out; }
.model-card:hover { border-color: var(--primary); transform: translateY(-5px); box-shadow: 0 8px 16px rgba(0,0,0,0.15); }
.model-header { display: flex; justify-content: space-between; align-items: start; margin-bottom: 1rem; }
.model-badge { background: var(--accent); color: white; padding: 0.25rem 0.75rem; border-radius: 1rem; font-size: 0.75rem; font-weight: 600; }
.model-title { font-size: 1.1rem; color: var(--dark); margin-bottom: 0.25rem; }
.model-brand { color: var(--primary); font-weight: 600; }
.model-features { list-style: none; margin: 1rem 0; }
.model-features li { padding: 0.3rem 0; padding-left: 1.5rem; position: relative; }
.model-features li:before { content: "✓"; position: absolute; left: 0; color: var(--success); font-weight: bold; }
.model-price { font-size: 1.5rem; font-weight: 700; color: var(--primary); margin-top: 1rem; }
.price-range { font-size: 0.9rem; color: #666; }
.tips-grid { display: grid; gap: 1rem; }
.tip-card { background: var(--light); padding: 1rem; border-left: 4px solid var(--primary); border-radius: 0.5rem; }
.tip-card h3 { color: var(--primary); margin-bottom: 0.5rem; }
footer { background: var(--dark); color: white; text-align: center; padding: 2rem 0; margin-top: 2rem; }
.price-comparison { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
th, td { padding: 0.75rem; text-align: left; border-bottom: 1px solid var(--light); }
th { background: var(--primary); color: white; font-weight: 600; }
tr:hover { background: var(--light); }
@media (max-width: 768px) { header h1 { font-size: 1.5rem; } .model-price { font-size: 1.2rem; } }