/* === Reset & Base === */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --accent: #8b5cf6;
    --bg: #0a0a0f;
    --bg-card: #12121a;
    --bg-card-hover: #1a1a2e;
    --border: #1e1e2e;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    --white: #ffffff;
    --radius: 12px;
    --radius-lg: 20px;
    --shadow: 0 4px 24px rgba(0,0,0,.3);
    --transition: .25s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* === Buttons === */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 12px 28px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: var(--white);
    font-weight: 600; font-size: .95rem;
    border: none; border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(99,102,241,.35); }
.btn-sm { padding: 8px 20px; font-size: .85rem; }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; }
.btn-outline {
    background: transparent;
    border: 1.5px solid var(--border);
    color: var(--text);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary-light); box-shadow: none; }
.btn-block { width: 100%; }

/* === Header === */
.header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(10,10,15,.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.2rem; }
.nav-links { display: flex; gap: 32px; }
.nav-links a { color: var(--text-muted); font-size: .9rem; font-weight: 500; transition: var(--transition); }
.nav-links a:hover { color: var(--white); }
.burger { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; }
.burger span { display: block; width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: var(--transition); }

/* === Hero === */
.hero {
    position: relative;
    padding: 160px 0 100px;
    text-align: center;
    overflow: hidden;
}
.hero-bg {
    position: absolute; inset: 0;
    background:
        radial-gradient(ellipse 60% 50% at 50% 0%, rgba(99,102,241,.15) 0%, transparent 70%),
        radial-gradient(ellipse 40% 40% at 70% 20%, rgba(139,92,246,.1) 0%, transparent 60%);
    pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; }
.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(99,102,241,.1);
    border: 1px solid rgba(99,102,241,.2);
    border-radius: 50px;
    font-size: .85rem; font-weight: 500;
    color: var(--primary-light);
    margin-bottom: 32px;
}
.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -.02em;
}
.gradient-text {
    background: linear-gradient(135deg, var(--primary-light), var(--accent), #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-desc {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 64px; }
.hero-stats {
    display: flex; justify-content: center; gap: 48px; flex-wrap: wrap;
    padding-top: 48px;
    border-top: 1px solid var(--border);
}
.stat { text-align: center; }
.stat-num { display: block; font-size: 1.8rem; font-weight: 700; color: var(--white); }
.stat-label { font-size: .85rem; color: var(--text-dim); }

/* === Sections === */
.section-header { text-align: center; margin-bottom: 64px; }
.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(99,102,241,.1);
    border: 1px solid rgba(99,102,241,.15);
    border-radius: 50px;
    font-size: .8rem; font-weight: 600;
    color: var(--primary-light);
    text-transform: uppercase;
    letter-spacing: .05em;
    margin-bottom: 16px;
}
.section-header h2 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700;
    margin-bottom: 12px;
}
.section-header p { color: var(--text-muted); font-size: 1.05rem; max-width: 500px; margin: 0 auto; }

/* === Features === */
.features { padding: 100px 0; }
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: var(--transition);
}
.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(99,102,241,.25);
    transform: translateY(-4px);
}
.feature-icon { font-size: 2rem; margin-bottom: 16px; }
.feature-card h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 10px; }
.feature-card p { color: var(--text-muted); font-size: .9rem; line-height: 1.6; }

/* === Pricing === */
.pricing { padding: 100px 0; }
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    align-items: start;
}
.price-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: var(--transition);
}
.price-card:hover { border-color: rgba(99,102,241,.3); }
.price-card.popular {
    border-color: var(--primary);
    background: linear-gradient(180deg, rgba(99,102,241,.08) 0%, var(--bg-card) 100%);
    transform: scale(1.03);
}
.popular-badge {
    position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
    padding: 4px 16px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 50px;
    font-size: .75rem; font-weight: 600;
    color: var(--white);
    white-space: nowrap;
}
.price-name { font-size: 1.2rem; font-weight: 700; margin-bottom: 4px; }
.price-desc { font-size: .85rem; color: var(--text-dim); margin-bottom: 20px; }
.price-amount { font-size: 2.8rem; font-weight: 800; margin-bottom: 28px; }
.currency { font-size: 1.4rem; vertical-align: super; margin-right: 2px; color: var(--text-muted); }
.period { font-size: .9rem; font-weight: 500; color: var(--text-dim); }
.price-features { margin-bottom: 28px; display: flex; flex-direction: column; gap: 12px; }
.price-features li {
    font-size: .9rem; color: var(--text-muted);
    padding-left: 24px;
    position: relative;
}
.price-features li::before {
    content: '✓'; position: absolute; left: 0;
    color: var(--primary-light); font-weight: 700;
}

/* === FAQ === */
.faq { padding: 100px 0; }
.faq-list { max-width: 720px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}
.faq-item[open] { border-color: rgba(99,102,241,.25); }
.faq-item summary {
    padding: 20px 24px;
    font-weight: 600; font-size: .95rem;
    cursor: pointer;
    list-style: none;
    display: flex; align-items: center; justify-content: space-between;
    transition: var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: '+'; font-size: 1.4rem; color: var(--text-dim);
    transition: var(--transition);
    flex-shrink: 0; margin-left: 16px;
}
.faq-item[open] summary::after { content: '−'; color: var(--primary-light); }
.faq-item p { padding: 0 24px 20px; color: var(--text-muted); font-size: .9rem; line-height: 1.7; }

/* === CTA === */
.cta { padding: 100px 0; }
.cta-inner {
    text-align: center;
    background: linear-gradient(135deg, rgba(99,102,241,.1), rgba(139,92,246,.08));
    border: 1px solid rgba(99,102,241,.15);
    border-radius: var(--radius-lg);
    padding: 80px 40px;
}
.cta-inner h2 { font-size: 2.2rem; font-weight: 700; margin-bottom: 12px; }
.cta-inner > p { color: var(--text-muted); font-size: 1.05rem; margin-bottom: 36px; }
.cta-form {
    display: flex; gap: 12px;
    max-width: 480px; margin: 0 auto 16px;
}
.cta-form input {
    flex: 1;
    padding: 16px 20px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-size: .95rem;
    font-family: inherit;
    outline: none;
    transition: var(--transition);
}
.cta-form input:focus { border-color: var(--primary); }
.cta-form input::placeholder { color: var(--text-dim); }
.cta-note { font-size: .8rem; color: var(--text-dim); }

/* === Footer === */
.footer { padding: 64px 0 0; border-top: 1px solid var(--border); }
.footer-inner { display: flex; justify-content: space-between; gap: 48px; flex-wrap: wrap; }
.footer-brand { max-width: 280px; }
.footer-brand p { color: var(--text-dim); font-size: .9rem; margin-top: 12px; }
.footer-links { display: flex; gap: 64px; flex-wrap: wrap; }
.footer-links h4 { font-size: .85rem; font-weight: 600; margin-bottom: 16px; color: var(--text); }
.footer-links div { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: var(--text-dim); font-size: .85rem; transition: var(--transition); }
.footer-links a:hover { color: var(--primary-light); }
.footer-bottom {
    margin-top: 48px; padding: 24px 0;
    border-top: 1px solid var(--border);
    text-align: center;
}
.footer-bottom p { font-size: .8rem; color: var(--text-dim); }

/* === Responsive === */
@media (max-width: 1024px) {
    .pricing-grid { grid-template-columns: repeat(2, 1fr); }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav .btn-sm { display: none; }
    .burger { display: flex; }
    .nav-links.active {
        display: flex; flex-direction: column;
        position: absolute; top: 72px; left: 0; right: 0;
        background: rgba(10,10,15,.95);
        backdrop-filter: blur(20px);
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
    }
    .features-grid { grid-template-columns: 1fr; }
    .pricing-grid { grid-template-columns: 1fr; }
    .price-card.popular { transform: none; }
    .hero-stats { gap: 24px; }
    .hero { padding: 130px 0 80px; }
    .cta-form { flex-direction: column; }
    .footer-links { gap: 32px; }
    .cta-inner { padding: 48px 24px; }
}