/* assets/style.css - toàn bộ CSS dùng cho site (tách từ index) */
:root{--primary:#2563eb;--muted:#6b7280}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:Inter,system-ui,Arial,sans-serif;line-height:1.6;color:#1a1a1a;background:#fff}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
nav{background:#fff;box-shadow:0 1px 3px rgba(0,0,0,0.1);position:sticky;top:0;z-index:1000}
.nav-container{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;max-width:1200px;margin:0 auto}
.logo{display:flex;align-items:center;font-size:24px;font-weight:700;color:var(--primary);text-decoration:none}
.logo i{margin-right:8px;transform:rotate(-45deg)}
.nav-links{display:flex;list-style:none;gap:32px}
.nav-links a{color:#4b5563;text-decoration:none;font-weight:500;font-size:15px;transition:color .2s}
.nav-links a:hover{color:var(--primary)}
.nav-buttons{display:flex;gap:12px;align-items:center}
.btn-signin{padding:8px 16px;background:transparent;border:1px solid #d1d5db;border-radius:8px;color:#374151;font-weight:500;font-size:14px;cursor:pointer;transition:all .2s}
.btn-signin:hover{background:#f9fafb}
.btn-signup{padding:8px 16px;background:var(--primary);border:none;border-radius:8px;color:#fff;font-weight:500;font-size:14px;cursor:pointer;transition:background .2s}
.btn-signup:hover{background:#1d4ed8}
.hero{padding:80px 0;text-align:center;background:linear-gradient(to bottom,#f8fafc,#ffffff)}
.hero-badge{display:inline-flex;align-items:center;background:#dbeafe;color:#1e40af;padding:6px 12px;border-radius:20px;font-size:14px;font-weight:500;margin-bottom:24px}
.hero-badge i{margin-right:6px}
.hero h1{font-size:48px;font-weight:700;margin-bottom:16px;color:#111827;line-height:1.2}
.hero p{font-size:20px;color:var(--muted);max-width:600px;margin:0 auto 32px;line-height:1.5}
.hero-form{max-width:500px;margin:0 auto}
.input-group{display:flex;background:#fff;border:1px solid #d1d5db;border-radius:12px;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,0.1)}
.input-prefix{padding:14px 16px;background:#f9fafb;border-right:1px solid #d1d5db;color:var(--muted);font-weight:500}
.input-field{flex:1;padding:14px 16px;border:none;font-size:16px;outline:none}
.btn-claim{width:100%;padding:14px 24px;background:var(--primary);color:#fff;border:none;border-radius:12px;font-size:16px;font-weight:600;cursor:pointer;margin-top:16px;transition:background .2s}
.btn-claim:hover{background:#1d4ed8}
.form-footer{margin-top:16px;font-size:14px;color:var(--muted)}
.form-footer a{color:var(--primary);text-decoration:none}
.platform-section{padding:60px 0;text-align:center}
.platform-title{font-size:18px;font-weight:600;color:#374151;margin-bottom:24px}
.platform-icons{display:flex;justify-content:center;gap:20px;flex-wrap:wrap}
.platform-icon{width:64px;height:64px;display:flex;align-items:center;justify-content:center;background:#f3f4f6;border-radius:16px;transition:transform .2s,background .2s}
.platform-icon:hover{transform:translateY(-4px);background:#e5e7eb}
.platform-icon i{font-size:28px}
.instagram{color:#E4405F}.tiktok{color:#000}.twitter{color:#1DA1F2}.youtube{color:#FF0000}.facebook{color:#1877F2}.linkedin{color:#0077B5}
.pricing-section{padding:80px 0;background:#f9fafb}
.section-header{text-align:center;margin-bottom:60px}
.section-title{font-size:36px;font-weight:700;margin-bottom:16px;color:#111827}
.section-subtitle{font-size:18px;color:var(--muted)}
.pricing-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px;max-width:1000px;margin:0 auto}
.pricing-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 6px rgba(0,0,0,0.05);transition:transform .2s,box-shadow .2s;height:100%;display:flex;flex-direction:column}
.pricing-card:hover{transform:translateY(-4px);box-shadow:0 10px 20px rgba(0,0,0,0.1)}
.pricing-card.featured{border:2px solid:var(--primary);transform:scale(1.05)}
.plan-name{font-size:24px;font-weight:700;margin-bottom:8px;color:#111827}
.plan-price{font-size:32px;font-weight:700;margin-bottom:8px;color:var(--primary)}
.plan-price span{font-size:16px;font-weight:400;color:var(--muted)}
.plan-description{font-size:14px;color:var(--muted);margin-bottom:24px}
.plan-features{list-style:none;margin-bottom:24px;flex-grow:1}
.plan-features li{display:flex;align-items:center;margin-bottom:12px;font-size:14px;color:#374151}
.plan-features li i{color:#10b981;margin-right:8px}
.plan-button{width:100%;padding:12px 24px;background:var(--primary);color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:background .2s}
.plan-button:hover{background:#1d4ed8}
footer{background:#111827;color:#fff;padding:60px 0 30px}
.footer-content{display:grid;grid-template-columns:2fr 1fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand{display:flex;align-items:center;font-size:24px;font-weight:700;margin-bottom:16px}
.footer-brand i{margin-right:8px;transform:rotate(-45deg)}
.footer-description{font-size:14px;color:#9ca3af;line-height:1.6;margin-bottom:24px}
.footer-social{display:flex;gap:12px}
.social-icon{width:36px;height:36px;background:#374151;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;transition:background .2s}
.social-icon:hover{background:#4b5563}
.footer-column h3{font-size:16px;font-weight:600;margin-bottom:16px}
.footer-links{list-style:none}
.footer-links li{margin-bottom:12px}
.footer-links a{color:#9ca3af;text-decoration:none;font-size:14px;transition:color .2s}
.footer-links a:hover{color:#fff}
.footer-bottom{padding-top:30px;border-top:1px solid #374151;display:flex;justify-content:space-between;align-items:center}
.copyright{font-size:14px;color:#9ca3af}
.footer-bottom-social{display:flex;gap:16px}
@media (max-width:768px){.nav-links{display:none}.hero h1{font-size:32px}.pricing-cards{grid-template-columns:1fr}.pricing-card.featured{transform:scale(1)}.footer-content{grid-template-columns:1fr;text-align:center}.footer-bottom{flex-direction:column;gap:16px}}