:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-glass: rgba(255, 255, 255, 0.85);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --accent: #3b82f6;
    --accent-light: #60a5fa;
    --accent-dark: #2563eb;
    --success: #10b981;
    --border-color: rgba(148, 163, 184, 0.2);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 24px 0;
    transition: all 0.3s ease;
}

.header.scrolled {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
}

.header-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 12px;
    letter-spacing: -0.02em;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--accent);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.nav a:hover,
.nav a.active {
    color: var(--accent);
    background: rgba(59, 130, 246, 0.08);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 160px 32px 100px;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 20%;
    right: 10%;
    width: 600px;
    height: 600px;
    background: var(--gradient-1);
    opacity: 0.08;
    filter: blur(120px);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 10%;
    left: 5%;
    width: 400px;
    height: 400px;
    background: var(--gradient-3);
    opacity: 0.06;
    filter: blur(100px);
    border-radius: 50%;
    animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, -30px); }
}

.hero-container {
    max-width: 1280px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto 60px;
}

.hero h1 {
    font-size: clamp(48px, 6vw, 72px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 32px;
    color: var(--text-primary);
}

.hero h1 span {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: clamp(18px, 2vw, 22px);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 48px;
    font-weight: 400;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent);
    color: white;
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: white;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

/* Hero Preview */
.hero-preview {
    max-width: 1000px;
    margin: 0 auto;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
    padding: 32px;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.preview-browser {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.preview-header {
    background: var(--bg-secondary);
    padding: 12px 16px;
    display: flex;
    gap: 8px;
    align-items: center;
}

.preview-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.preview-dot.red { background: #ef4444; }
.preview-dot.yellow { background: #f59e0b; }
.preview-dot.green { background: #10b981; }

.preview-content {
    padding: 60px 40px;
    text-align: center;
}

.preview-logo {
    font-size: 80px;
    margin-bottom: 16px;
}

.preview-text {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.preview-subtext {
    font-size: 14px;
    color: var(--text-muted);
}

/* Features Section */
.features {
    padding: 160px 32px;
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 80px;
}

.section-label {
    display: inline-block;
    background: var(--gradient-1);
    color: white;
    padding: 6px 16px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 24px;
}

.section-title {
    font-size: clamp(36px, 4vw, 48px);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.section-description {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.features-grid {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    border: 1px solid var(--border-color);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 24px;
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
    background: var(--gradient-1);
    transform: scale(1.1);
}

.feature-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-text {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Platforms Section */
.platforms {
    padding: 160px 32px;
    background: var(--bg-primary);
}

.platforms-grid {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.platform-card {
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: 32px 40px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all 0.4s ease;
    cursor: pointer;
    min-width: 180px;
}

.platform-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent);
}

.platform-icon {
    font-size: 48px;
    margin-bottom: 16px;
    display: inline-block;
    transition: transform 0.3s ease;
}

.platform-card:hover .platform-icon {
    transform: scale(1.2);
}

.platform-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

/* FAQ Section */
.faq {
    padding: 160px 32px;
    background: var(--bg-secondary);
}

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

.faq-item {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    margin-bottom: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active {
    box-shadow: var(--shadow-lg);
}

.faq-question {
    padding: 24px 32px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 17px;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.faq-question:hover {
    color: var(--accent);
}

.faq-toggle {
    width: 32px;
    height: 32px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    flex-shrink: 0;
    margin-left: 20px;
}

.faq-item.active .faq-toggle {
    background: var(--accent);
    color: white;
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.faq-answer p {
    padding: 0 32px 24px;
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 15px;
}

/* Footer */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 60px 32px;
}

.footer-content {
    max-width: 1280px;
    margin: 0 auto;
    text-align: center;
}

.footer p {
    font-size: 14px;
    color: var(--text-muted);
    margin: 8px 0;
    line-height: 1.7;
}

.footer a {
    color: var(--accent);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

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

@media (max-width: 768px) {
    .header-content {
        padding: 0 20px;
    }

    .nav {
        display: none;
    }

    .hero {
        padding: 140px 20px 80px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .platforms-grid {
        gap: 16px;
    }

    .platform-card {
        min-width: 150px;
        padding: 24px 20px;
    }

    .features,
    .platforms,
    .faq {
        padding: 100px 20px;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .hero-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 32px;
    }

    .feature-card {
        padding: 32px 24px;
    }

    .faq-question {
        padding: 20px;
        font-size: 15px;
    }
}