:root {
    --bg-color: #0a0a0f;
    --card-bg: #12121a;
    --accent-color: #6c5ce7;
    --accent-hover: #5a4bcf;
    --text-main: #ffffff;
    --text-muted: #8888aa;
    --border-color: #2a2a35;
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* Typography */
h1, h2, h3, h4 {
    line-height: 1.2;
    font-weight: 700;
}

.section-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 3rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
}

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

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(108, 92, 231, 0.3);
}

.btn-ghost {
    background-color: transparent;
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

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

.btn-lg {
    padding: 16px 32px;
    font-size: 1.125rem;
}

.btn-full {
    width: 100%;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 100;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

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

.nav-link {
    color: var(--text-muted);
    font-weight: 500;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--text-main);
}

.burger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 30px;
    height: 20px;
    position: relative;
    z-index: 101;
}

.burger span {
    position: absolute;
    width: 100%;
    height: 2px;
    background-color: var(--text-main);
    left: 0;
    transition: var(--transition);
}

.burger span:nth-child(1) { top: 0; }
.burger span:nth-child(2) { top: 9px; }
.burger span:nth-child(3) { top: 18px; }

.burger.active span:nth-child(1) {
    transform: rotate(45deg);
    top: 9px;
}
.burger.active span:nth-child(2) {
    opacity: 0;
}
.burger.active span:nth-child(3) {
    transform: rotate(-45deg);
    top: 9px;
}

/* Hero */
.hero {
    padding: 160px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(108, 92, 231, 0.15) 0%, rgba(10, 10, 15, 0) 70%);
    z-index: -1;
    pointer-events: none;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 24px;
    background: linear-gradient(to right, #fff, #a5a5b5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 40px;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
}

/* Features */
.features {
    padding: 80px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.feature-card {
    background-color: var(--card-bg);
    padding: 32px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.feature-title {
    font-size: 1.25rem;
    margin-bottom: 8px;
}

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

/* Pricing */
.pricing {
    padding: 80px 0;
}

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

.pricing-card {
    background-color: var(--card-bg);
    padding: 40px 32px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    position: relative;
    display: flex;
    flex-direction: column;
}

.pricing-card.popular {
    border-color: var(--accent-color);
    transform: scale(1.05);
    z-index: 1;
    box-shadow: 0 8px 32px rgba(108, 92, 231, 0.1);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--accent-color);
    color: #fff;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pricing-name {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.pricing-price {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 32px;
}

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

.pricing-features {
    margin-bottom: 32px;
    flex-grow: 1;
}

.pricing-features li {
    margin-bottom: 12px;
    padding-left: 24px;
    position: relative;
    color: #e0e0e0;
}

.pricing-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

.pricing-note {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* How to */
.how-to {
    padding: 80px 0;
}

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

.step-card {
    background-color: var(--card-bg);
    padding: 32px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.step-number {
    width: 48px;
    height: 48px;
    background-color: rgba(108, 92, 231, 0.1);
    color: var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 24px;
}

.step-title {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

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

/* Platforms */
.platforms {
    padding: 80px 0;
}

.platforms-grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
}

.platform-item {
    background-color: var(--card-bg);
    padding: 16px 24px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    min-width: 200px;
}

.platform-name {
    font-weight: 600;
    margin-bottom: 4px;
}

.platform-apps {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* FAQ */
.faq {
    padding: 80px 0 120px;
}

.accordion {
    max-width: 800px;
    margin: 0 auto;
}

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

.accordion-header {
    width: 100%;
    text-align: left;
    padding: 24px 0;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-family);
}

.accordion-header::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--accent-color);
    transition: var(--transition);
}

.accordion-header.active::after {
    content: '−';
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.accordion-content p {
    padding-bottom: 24px;
    color: var(--text-muted);
}

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

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 32px;
}

.footer-info .logo {
    display: block;
    margin-bottom: 16px;
}

.copyright {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 8px;
}

.footer-email {
    color: var(--text-muted);
    font-size: 0.875rem;
    transition: var(--transition);
}

.footer-email:hover {
    color: var(--accent-color);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.95rem;
    transition: var(--transition);
}

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

/* Legal Pages */
.legal-page {
    padding: 120px 0 80px;
}

.legal-content {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--card-bg);
    padding: 48px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.legal-content h1 {
    margin-bottom: 32px;
    font-size: 2rem;
}

.legal-content h2 {
    margin: 32px 0 16px;
    font-size: 1.25rem;
}

.legal-content p, .legal-content ul {
    margin-bottom: 16px;
    color: var(--text-muted);
}

.legal-content ul {
    padding-left: 24px;
    list-style: disc;
}

/* Responsive */
@media (max-width: 992px) {
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto 24px;
    }
    
    .pricing-card.popular {
        transform: none;
    }
    
    .steps-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .burger {
        display: block;
    }

    .nav {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background-color: var(--card-bg);
        flex-direction: column;
        padding: 24px;
        gap: 24px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        border-bottom: 1px solid var(--border-color);
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-btn {
        width: 100%;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
    }

    .footer-inner {
        flex-direction: column;
    }
    
    .legal-content {
        padding: 24px;
    }
}