:root {
    --brand: #2563eb;
    --brand-dark: #1d4ed8;
    --brand-light: #eff6ff;
    --brand-glow: rgba(37,99,235,0.12);
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --success: #10b981;
    --danger: #ef4444;
    --purple: #7c3aed;
    --radius: 12px;
    --radius-lg: 20px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.04);
    --shadow-glow: 0 0 40px rgba(37,99,235,0.15);
}

html { scroll-behavior: smooth; }
body { font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif; color: var(--gray-800); line-height: 1.6; background: #fff; overflow-x: hidden; -webkit-font-smoothing: antialiased; }

.landing-container, .seo-container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.landing-nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,0.92); backdrop-filter: blur(20px); border-bottom: 1px solid rgba(0,0,0,0.06); transition: box-shadow 0.3s; }
.landing-nav.scrolled { box-shadow: var(--shadow-md); }
.nav-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; height: 64px; }
.nav-logo img { height: 28px; }
.nav-links { display: flex; align-items: center; gap: 2rem; }
.nav-links a { font-size: 0.875rem; font-weight: 500; color: var(--gray-600); text-decoration: none; transition: color 0.2s; }
.nav-links a:hover { color: var(--brand); }
.nav-cta { display: inline-flex; align-items: center; gap: 0.5rem; padding: 8px 20px; background: var(--brand); color: #fff !important; border-radius: 8px; font-weight: 600; font-size: 0.875rem; transition: all 0.2s; }
.nav-cta:hover { background: var(--brand-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); color: #fff !important; }
.nav-login { color: var(--gray-500) !important; }

.mobile-nav-btn { display: none; background: none; border: none; cursor: pointer; padding: 6px; border-radius: 8px; transition: background 0.15s; }
.mobile-nav-btn:active { background: var(--gray-100); }
.mobile-nav-btn svg { width: 22px; height: 22px; stroke: var(--gray-700); }
.mobile-nav-menu { display: none !important; }

.btn-hero { display: inline-flex; align-items: center; gap: 0.5rem; padding: 14px 28px; border-radius: 10px; font-weight: 700; font-size: 1rem; text-decoration: none; transition: all 0.25s; border: none; cursor: pointer; }
.btn-hero-primary { background: var(--brand); color: #fff; box-shadow: 0 4px 14px rgba(37,99,235,0.35); }
.btn-hero-primary:hover { background: var(--brand-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(37,99,235,0.4); }
.btn-hero-secondary { background: #fff; color: var(--gray-700); border: 1.5px solid var(--gray-200); }
.btn-hero-secondary:hover { border-color: var(--brand); color: var(--brand); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-hero-ghost { background: transparent; color: #fff; border: 1.5px solid var(--gray-500); }
.btn-hero-ghost:hover { border-color: #fff; background: rgba(255,255,255,0.1); transform: translateY(-2px); color: #fff; }

.cta-section { padding: 100px 0; background: linear-gradient(135deg, var(--gray-900) 0%, #1a1a2e 100%); text-align: center; position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; top: -100px; right: -100px; width: 400px; height: 400px; background: radial-gradient(circle, rgba(37,99,235,0.2), transparent 70%); pointer-events: none; }
.cta-title { font-size: 2.75rem; font-weight: 900; color: #fff; margin-bottom: 1rem; letter-spacing: -0.03em; position: relative; }
.cta-sub { font-size: 1.1rem; color: var(--gray-400); margin-bottom: 2.5rem; max-width: 550px; margin-left: auto; margin-right: auto; position: relative; line-height: 1.7; }
.cta-actions { display: flex; justify-content: center; gap: 1rem; position: relative; flex-wrap: wrap; }

.landing-footer { background: var(--gray-900); color: var(--gray-400); padding: 60px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1fr 1fr; gap: 2.5rem; margin-bottom: 3rem; }
.footer-brand-text { font-size: 0.85rem; line-height: 1.7; margin-top: 1rem; color: var(--gray-500); max-width: 320px; }
.footer-col h4 { font-size: 0.8rem; font-weight: 700; color: #fff; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 1rem; }
.footer-col a { display: block; font-size: 0.85rem; color: var(--gray-500); text-decoration: none; padding: 4px 0; transition: color 0.2s; }
.footer-col a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid var(--gray-800); padding-top: 1.5rem; display: flex; justify-content: space-between; align-items: center; font-size: 0.8rem; flex-wrap: wrap; gap: 0.75rem; }
.footer-bottom a { color: var(--gray-500); text-decoration: none; }
.footer-bottom a:hover { color: #fff; }

.fade-up { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

.gradient-text { background: linear-gradient(135deg, var(--brand), var(--purple)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .nav-links { display: none !important; }
    .mobile-nav-btn { display: block; }
    .mobile-nav-menu.open { display: flex !important; position: fixed; top: 64px; left: 0; right: 0; bottom: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); flex-direction: column; padding: 0.75rem 1rem 2rem; gap: 2px; z-index: 10000; overflow-y: auto; -webkit-overflow-scrolling: touch; animation: menuSlideIn 0.2s ease-out; }
    @keyframes menuSlideIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
    .mobile-nav-menu.open a { display: flex; align-items: center; padding: 14px 16px; font-size: 0.925rem; font-weight: 500; color: var(--gray-600); text-decoration: none; border-radius: 12px; transition: all 0.15s ease; letter-spacing: -0.01em; }
    .mobile-nav-menu.open a:hover, .mobile-nav-menu.open a:active { background: var(--gray-50); color: var(--brand); }
    .mobile-nav-menu.open .nav-cta { background: var(--brand); color: #fff !important; text-align: center; justify-content: center; margin-top: 1rem; border-radius: 12px; padding: 15px 20px; font-weight: 600; font-size: 0.95rem; box-shadow: 0 4px 14px rgba(37,99,235,0.3); }
    .mobile-nav-menu.open .nav-cta:hover, .mobile-nav-menu.open .nav-cta:active { background: var(--brand-dark); color: #fff !important; box-shadow: 0 6px 20px rgba(37,99,235,0.4); }
    .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
    .footer-bottom { flex-direction: column; gap: 0.75rem; text-align: center; }
    .cta-title { font-size: 2rem; }
}