/* ========================================
   SWIPPEZ - MODERN DARK MODE STYLESHEET
   ======================================== */

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

:root {
    /* Colors from your app */
    --color-bg: #FFFFFF;
    --color-bg-secondary: #F8F9FA;
    --color-card: #FFFFFF;
    --color-primary: #007AFF;
    --color-primary-dark: #0051D5;
    --color-accent: #FF2D55;
    --color-green: #34C759;
    --color-text: #1C1C1E;
    --color-text-secondary: #6C6C70;
    --color-text-disabled: #AEAEB2;
    --color-border: #E5E5EA;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;
    --spacing-3xl: 96px;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========================================
   HEADER
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo img {
    width: 48px;
    height: 48px;
    border-radius: 12px;
}

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

.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.btn-primary {
    background: var(--color-primary);
    color: white !important;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    padding-top: 140px;
    padding-bottom: var(--spacing-3xl);
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 20px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.btn-appstore {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: var(--color-text);
    color: var(--color-bg);
    padding: 16px 32px;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-size: 18px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

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

.btn-appstore-large {
    font-size: 20px;
    padding: 20px 40px;
}

.appstore-icon {
    width: 24px;
    height: 24px;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.screenshot {
    max-width: 100%;
    height: auto;
    max-height: 700px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* ========================================
   FEATURES SECTION
   ======================================== */
.features {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-secondary);
}

.section-title {
    font-size: 48px;
    font-weight: 800;
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    letter-spacing: -0.02em;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-md);
    max-width: 1100px;
    margin: 0 auto;
}

.feature-card {
    background: var(--color-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary);
    box-shadow: 0 12px 40px rgba(0, 122, 255, 0.2);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-sm);
}

.feature-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.feature-description {
    color: var(--color-text-secondary);
    font-size: 16px;
    line-height: 1.5;
}

/* ========================================
   HOW IT WORKS SECTION
   ======================================== */
.how-it-works {
    padding: var(--spacing-3xl) 0;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    text-align: center;
    padding: var(--spacing-lg);
}

.step-number {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: 800;
    margin: 0 auto var(--spacing-md);
    box-shadow: 0 8px 24px rgba(0, 122, 255, 0.3);
}

.step-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.step-description {
    color: var(--color-text-secondary);
    font-size: 16px;
}

/* ========================================
   DOWNLOAD SECTION
   ======================================== */
.download {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-secondary);
    text-align: center;
}

.download-description {
    font-size: 20px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--color-card);
    padding: var(--spacing-2xl) 0 var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-logo img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
}

.footer-logo span {
    font-size: 20px;
    font-weight: 700;
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom p {
    color: var(--color-text-disabled);
    font-size: 14px;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-title {
        font-size: 48px;
    }
    
    .hero-image {
        order: -1;
    }
    
    .screenshot {
        max-height: 500px;
    }
    
    .section-title {
        font-size: 36px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 640px) {
    .nav {
        gap: var(--spacing-sm);
    }
    
    .logo-text {
        font-size: 20px;
    }
    
    .hero {
        padding-top: 100px;
        padding-bottom: var(--spacing-2xl);
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-description {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .feature-card {
        padding: var(--spacing-md);
    }
}