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

:root {
    --primary: #007AFF;
    --primary-dark: #0051D5;
    --secondary: #5856D6;
    --text: #1d1d1f;
    --text-light: #86868b;
    --bg: #ffffff;
    --bg-alt: #f5f5f7;
    --border: #d2d2d7;
    --radius: 12px;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
}

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

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

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.contact-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    color: var(--text);
    transition: all 0.2s;
    text-decoration: none;
}

.contact-btn:hover {
    background: var(--bg-alt);
    color: var(--primary);
}

.contact-btn svg {
    width: 24px;
    height: 24px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

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

.btn-secondary:hover {
    background: var(--primary);
    color: white;
}

.btn-large {
    padding: 14px 32px;
    font-size: 18px;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    text-align: center;
    background: linear-gradient(180deg, var(--bg-alt) 0%, var(--bg) 100%);
}

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

.hero h1 {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 24px;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 24px;
    color: var(--text-light);
    margin-bottom: 40px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
}

.app-preview {
    display: flex;
    justify-content: center;
    margin-top: 60px;
}

.phone-mockup {
    width: 320px;
    max-width: 90vw;
    box-shadow: var(--shadow-lg);
    border-radius: 40px;
    overflow: hidden;
    background: #000;
}

.app-screenshot {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 36px;
}

/* Features Section */
.features {
    padding: 80px 0;
    background: var(--bg);
}

.features h2 {
    text-align: center;
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    padding: 32px;
    background: var(--bg-alt);
    border-radius: var(--radius);
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 24px;
    margin-bottom: 12px;
    font-weight: 600;
}

.feature-card p {
    color: var(--text-light);
    font-size: 16px;
}

/* Download Section */
.download {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    text-align: center;
}

.download-content h2 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
}

.download-content p {
    font-size: 20px;
    margin-bottom: 32px;
    opacity: 0.9;
}

.app-store-btn {
    background: white;
    color: var(--primary);
    padding: 16px 32px;
    font-size: 18px;
}

.app-store-btn:hover {
    background: var(--bg-alt);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.download-note {
    margin-top: 16px;
    font-size: 14px;
    opacity: 0.8;
}

/* Footer */
.footer {
    padding: 40px 0;
    background: var(--bg-alt);
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-content p {
    color: var(--text-light);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.2s;
}

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

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-large {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .features h2,
    .download-content h2 {
        font-size: 32px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .phone-mockup {
        width: 280px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}