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

:root {
    --primary: #0288D1;
    --primary-light: #4FC3F7;
    --primary-container: #B3E5FC;
    --on-primary-container: #003C6B;
    --secondary: #00897B;
    --secondary-container: #B2DFDB;
    --tertiary: #E65100;
    --error: #D32F2F;
    --surface: #FFFFFF;
    --background: #F0F7FF;
    --on-surface: #1A1A2E;
    --on-background: #1A1A2E;
    --surface-variant: #E3F2FD;
    --outline: #90CAF9;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--background);
    color: var(--on-surface);
    line-height: 1.6;
}

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

/* Header */
.header {
    background: var(--surface);
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 32px;
    height: 32px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    text-decoration: none;
    color: var(--on-surface);
    font-weight: 500;
    transition: color 0.2s;
}

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

/* Hero */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--surface) 0%, var(--surface-variant) 100%);
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-content {
    flex: 1;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--on-surface);
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: #5A6A7A;
    margin-bottom: 32px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background: #0277BD;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(2, 136, 209, 0.3);
}

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

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

/* Phone Mockup */
.hero-visual {
    flex: 0 0 280px;
}

.phone-mockup {
    background: #1A1A2E;
    border-radius: 36px;
    padding: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}

.phone-screen {
    background: var(--surface);
    border-radius: 28px;
    overflow: hidden;
    padding: 20px 16px;
}

.mockup-content {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.mockup-header {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
}

.mockup-card {
    background: var(--primary-container);
    border-radius: 8px;
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.mockup-card.budget {
    background: var(--secondary-container);
}

.mockup-label {
    font-size: 0.625rem;
    color: #5A6A7A;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mockup-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--on-surface);
}

.mockup-progress {
    height: 4px;
    background: rgba(0,0,0,0.1);
    border-radius: 2px;
    margin-top: 6px;
}

.mockup-progress-bar {
    height: 100%;
    background: var(--secondary);
    border-radius: 2px;
}

.mockup-section {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.mockup-section-title {
    font-size: 0.625rem;
    font-weight: 600;
    color: #5A6A7A;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mockup-bill {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--on-surface);
    padding: 4px 0;
    border-bottom: 1px solid var(--surface-variant);
}

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

.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 48px;
    color: var(--on-surface);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--background);
    border-radius: 12px;
    padding: 28px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-container);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--on-surface);
}

.feature-card p {
    font-size: 0.875rem;
    color: #5A6A7A;
    line-height: 1.6;
}

/* About */
.about {
    padding: 80px 0;
    background: var(--background);
}

.about-content {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    font-size: 1.0625rem;
    color: #5A6A7A;
    margin-bottom: 16px;
}

/* Contact */
.contact {
    padding: 80px 0;
    background: var(--surface);
}

.contact-content {
    text-align: center;
}

.contact-content p {
    font-size: 1.0625rem;
    color: #5A6A7A;
    margin-bottom: 16px;
}

.contact-email {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
}

.contact-email:hover {
    text-decoration: underline;
}

/* Footer */
.footer {
    background: var(--on-surface);
    color: var(--surface);
    padding: 32px 0;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--surface);
    text-decoration: none;
    font-size: 0.875rem;
}

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

.footer-divider {
    color: rgba(255,255,255,0.3);
}

.footer-copyright {
    text-align: center;
    font-size: 0.8125rem;
    color: rgba(255,255,255,0.6);
}

/* Responsive */

/* Play Store Badge */
.play-store-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
    padding: 10px 20px;
    background: rgba(0,0,0,0.04);
    border-radius: 24px;
    width: fit-content;
}

.play-store-icon {
    font-size: 0.6rem;
    color: var(--tertiary);
}

.play-store-text {
    font-size: 0.8125rem;
    color: #5A6A7A;
    font-weight: 500;
}

@media (max-width: 768px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        max-width: 100%;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-visual {
        flex: none;
        width: 100%;
        display: flex;
        justify-content: center;
    }
    
    .nav-links {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}