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

:root {
    --primary: #00AFF0;
    --primary-dark: #018CF1;
    --primary-light: #5cc8f5;
    --primary-pale: #e8f7fe;
    --bg: #ffffff;
    --bg-light: #f8fafb;
    --bg-card: #ffffff;
    --bg-card-hover: #f0f8ff;
    --text: #27272B;
    --text-muted: #8A96A3;
    --text-light: #6b7685;
    --border: #e5e8eb;
    --border-light: #f0f2f4;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.1);
}

html { scroll-behavior: smooth; }

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

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

/* Nav */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text);
    text-decoration: none;
}

.logo span { color: var(--primary); }

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover { color: var(--primary); }

.nav-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.mobile-menu {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: 0.3s;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 22px;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 8px 30px rgba(0, 175, 240, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 2px solid var(--border);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-pale);
}

.btn-ghost {
    background: transparent;
    color: var(--text-light);
}

.btn-ghost:hover { color: var(--primary); }

.btn-lg {
    padding: 14px 32px;
    font-size: 1.05rem;
}

.btn-block { width: 100%; }

/* Hero */
.hero-logo {
    display: block;
    margin-bottom: 24px;
    font-size: 2rem;
}

.hero {
    padding: 80px 0 100px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, var(--primary-pale) 0%, var(--bg) 60%);
}

.hero::before {
    content: '';
    position: absolute;
    top: -300px;
    right: -200px;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(0, 175, 240, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero-inner {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 50px;
    background: var(--primary-pale);
    color: var(--primary-dark);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
    border: 1px solid rgba(0, 175, 240, 0.2);
}

.hero h1 {
    font-size: 3.8rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: -0.03em;
    color: var(--text);
}

.hero-sub {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 520px;
    margin-bottom: 32px;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

/* Subscribe Box */
.subscribe-box {
    display: flex;
    gap: 8px;
    margin-bottom: 48px;
    flex-wrap: wrap;
    max-width: 480px;
}

.subscribe-box input {
    flex: 1;
    min-width: 220px;
    padding: 14px 20px;
    border: 2px solid var(--border);
    border-radius: 50px;
    font-size: 1rem;
    font-family: inherit;
    background: var(--bg);
    color: var(--text);
    outline: none;
    transition: border-color 0.2s;
}

.subscribe-box input:focus {
    border-color: var(--primary);
}

.subscribe-box input::placeholder {
    color: var(--text-muted);
}

.subscribe-box button {
    padding: 14px 28px;
    white-space: nowrap;
}

.subscribe-success {
    width: 100%;
    font-size: 0.9rem;
    color: var(--primary-dark);
    font-weight: 500;
    margin-top: 4px;
}

.subscribe-error {
    width: 100%;
    font-size: 0.9rem;
    color: #e53e3e;
    font-weight: 500;
    margin-top: 4px;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
}

.stat strong {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
}

.stat span {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

/* Phone Mockup */
.hero-visual {
    display: flex;
    justify-content: center;
}

.phone-mockup {
    width: 360px;
    height: 700px;
    position: relative;
}

.phone-screen {
    width: 100%;
    height: 100%;
    border-radius: 24px;
    background: #000;
    overflow: hidden;
}

.phone-screen video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 24px;
}

.mock-profile { text-align: center; margin-bottom: 24px; }

.mock-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    margin: 0 auto 12px;
}

.mock-name {
    width: 100px;
    height: 14px;
    background: var(--border);
    border-radius: 4px;
    margin: 0 auto 8px;
}

.mock-bio {
    width: 160px;
    height: 10px;
    background: var(--border-light);
    border-radius: 4px;
    margin: 0 auto 16px;
}

.mock-btn {
    width: 120px;
    height: 32px;
    background: var(--primary);
    border-radius: 50px;
    margin: 0 auto;
}

.mock-post {
    width: 100%;
    height: 120px;
    background: var(--bg);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    margin-bottom: 12px;
}

.mock-post.short { height: 80px; }

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-header h2 {
    font-size: 2.4rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
    color: var(--text);
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-muted);
}

/* Features */
.features {
    padding: 100px 0;
    background: var(--bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    padding: 32px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all 0.3s;
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 16px;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-pale);
    border-radius: 14px;
}

.feature-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* How It Works */
.how-it-works {
    padding: 100px 0;
    background: var(--bg-light);
}

.steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 24px;
}

.step {
    text-align: center;
    max-width: 260px;
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-weight: 700;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    box-shadow: 0 4px 15px rgba(0, 175, 240, 0.3);
}

.step h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--text);
}

.step p {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.step-line {
    width: 80px;
    height: 2px;
    background: var(--border);
    margin-top: 24px;
    flex-shrink: 0;
}

/* Pricing */
.pricing {
    padding: 100px 0;
    background: var(--bg);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    align-items: start;
}

.price-card {
    padding: 36px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    position: relative;
    transition: all 0.3s;
}

.price-card:hover {
    box-shadow: var(--shadow-md);
}

.price-card.featured {
    border-color: var(--primary);
    box-shadow: 0 0 0 1px var(--primary), var(--shadow-lg);
    transform: scale(1.04);
}

.price-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: #fff;
    padding: 4px 16px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
}

.price-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}

.price {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 24px;
    color: var(--text);
}

.price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-muted);
}

.price-card ul {
    list-style: none;
    margin-bottom: 28px;
}

.price-card li {
    padding: 8px 0;
    font-size: 0.95rem;
    color: var(--text-light);
    border-bottom: 1px solid var(--border-light);
}

.price-card li::before {
    content: '\2713  ';
    color: var(--primary);
    font-weight: 700;
}

/* Testimonials */
.testimonials {
    padding: 100px 0;
    background: var(--bg-light);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.testimonial-card {
    padding: 28px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
}

.testimonial-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.stars {
    color: #f59e0b;
    font-size: 1rem;
    margin-bottom: 16px;
    letter-spacing: 2px;
}

.testimonial-card > p {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 20px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

.testimonial-author strong {
    display: block;
    font-size: 0.9rem;
    color: var(--text);
}

.testimonial-author span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* FAQ */
.faq {
    padding: 100px 0;
    background: var(--bg);
}

.faq-list {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border);
}

.faq-item summary {
    padding: 20px 0;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color 0.2s;
    color: var(--text);
}

.faq-item summary:hover { color: var(--primary); }

.faq-item summary::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--text-muted);
    transition: transform 0.2s;
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
    color: var(--primary);
}

.faq-item p {
    padding-bottom: 20px;
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* Final CTA */
.final-cta {
    padding: 100px 0;
    text-align: center;
    background: linear-gradient(180deg, var(--bg) 0%, var(--primary-pale) 100%);
}

.final-cta h2 {
    font-size: 2.6rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text);
}

.final-cta p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 32px;
}

/* Footer */
.footer {
    padding: 60px 0 0;
    border-top: 1px solid var(--border);
    background: var(--bg-light);
}

.footer-brand {
    padding-bottom: 40px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 8px;
}

.footer-links {
    display: flex;
    gap: 64px;
}

.footer-links h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text);
    margin-bottom: 16px;
    font-weight: 600;
}

.footer-links a {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 4px 0;
    transition: color 0.2s;
}

.footer-links a:hover { color: var(--primary); }

.footer-bottom {
    padding: 24px 0;
    border-top: 1px solid var(--border);
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
    padding: 0;
}

/* Responsive */
@media (max-width: 968px) {
    .hero h1 { font-size: 2.8rem; }
    .hero-inner { grid-template-columns: 1fr; text-align: center; }
    .hero-sub { margin: 0 auto 32px; }
    .hero-cta { justify-content: center; }
    .hero-stats { justify-content: center; }
    .hero-logo { text-align: center; }
    .subscribe-box { justify-content: center; margin-left: auto; margin-right: auto; }
    .hero-visual { margin-top: 40px; }
    .phone-mockup { width: 280px; height: 540px; }
    .footer-inner { flex-direction: column; }
}

@media (max-width: 640px) {
    .hero { padding: 60px 0 60px; }
    .hero h1 { font-size: 2rem; }
    .hero-sub { font-size: 1rem; }
    .section-header h2 { font-size: 1.8rem; }
    .subscribe-box { flex-direction: column; }
    .subscribe-box input { min-width: 100%; }
    .subscribe-box button { width: 100%; }
    .hero-stats { flex-direction: column; gap: 16px; }
    .stat-divider { width: 40px; height: 1px; }
    .phone-mockup { width: 240px; height: 460px; }
    .phone-screen { border-radius: 18px; }
    .phone-screen video { border-radius: 18px; }
    .faq { padding: 60px 0; }
    .final-cta { padding: 60px 0; }
    .final-cta h2 { font-size: 1.8rem; }
    .badge { font-size: 0.75rem; }
}