:root {
    /* Colors */
    --primary: #007AFF;
    --primary-dark: #0051D5;
    --accent: #5E5CE6;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.18);
    --text-primary: #1D1D1F;
    --text-secondary: #86868B;
    --gradient-1: #667eea;
    --gradient-2: #764ba2;
    --gradient-3: #f093fb;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-display: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --font-body: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text-primary);
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-icon {
    font-size: 2rem;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.3s;
}

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

/* Buttons */
.cta-button, .primary-button, .secondary-button {
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.cta-button, .primary-button {
    background: var(--primary);
    color: white;
}

.cta-button:hover, .primary-button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 122, 255, 0.3);
}

.secondary-button {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.secondary-button:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: calc(80px + var(--spacing-lg));
    overflow: hidden;
}

.mesh-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(at 20% 30%, var(--gradient-1) 0px, transparent 50%),
        radial-gradient(at 80% 70%, var(--gradient-2) 0px, transparent 50%),
        radial-gradient(at 40% 80%, var(--gradient-3) 0px, transparent 50%);
    opacity: 0.3;
    animation: meshMove 20s ease infinite;
    z-index: -1;
}

@keyframes meshMove {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

.hero-content {
    max-width: 600px;
    z-index: 1;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-sm);
}

.gradient-text {
    background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--glass-border);
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Phone Mockup */
.hero-image {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    display: none;
}

@media (min-width: 1024px) {
    .hero-image {
        display: block;
    }
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background: #1D1D1F;
    border-radius: 40px;
    padding: 12px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
    position: relative;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 32px;
    overflow: hidden;
}

.mockup-content {
    padding: var(--spacing-md);
    color: white;
}

.mockup-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.mockup-avatar {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.mockup-title {
    font-weight: 700;
    font-size: 1.25rem;
}

.mockup-subtitle {
    font-size: 0.875rem;
    opacity: 0.7;
}

.mockup-balance {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md);
    border-radius: 16px;
    margin-bottom: var(--spacing-md);
}

.balance-label {
    font-size: 0.875rem;
    opacity: 0.8;
}

.balance-amount {
    font-size: 2.5rem;
    font-weight: 700;
    margin-top: 0.25rem;
}

.mockup-expenses {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.expense-item {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-sm);
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.expense-icon {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.expense-details {
    flex: 1;
}

.expense-name {
    font-weight: 600;
}

.expense-date {
    font-size: 0.75rem;
    opacity: 0.7;
}

.expense-amount {
    font-weight: 700;
    font-size: 1.125rem;
}

/* Features Section */
.features {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: var(--spacing-md);
    transition: transform 0.3s, box-shadow 0.3s;
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* How It Works */
.how-it-works {
    padding: var(--spacing-xl) 0;
    background: rgba(255, 255, 255, 0.5);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.step {
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto var(--spacing-sm);
}

.step h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.step p {
    color: var(--text-secondary);
}

/* Download Section */
.download {
    padding: var(--spacing-xl) 0;
}

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

.download-card h2 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
}

.download-card p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.download-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.app-store-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: #000;
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    text-decoration: none;
    transition: transform 0.3s;
}

.app-store-button:hover {
    transform: scale(1.05);
}

.button-subtitle {
    font-size: 0.75rem;
    text-align: left;
}

.button-title {
    font-size: 1.25rem;
    font-weight: 700;
    text-align: left;
}

.coming-soon-badge {
    background: var(--glass-bg);
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    font-weight: 600;
    color: var(--text-secondary);
}

/* Footer */
.footer {
    background: rgba(0, 0, 0, 0.05);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

.footer-column h4 {
    margin-bottom: var(--spacing-sm);
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: var(--spacing-xs);
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--glass-border);
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        gap: var(--spacing-sm);
    }
    
    .nav-links a {
        font-size: 0.875rem;
    }
    
    .hero {
        padding-top: calc(80px + var(--spacing-md));
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}