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

:root {
    /* App-accurate colors */
    --color-bg-light: #F8F8F8;
    --color-bg-dark: #121212;
    --color-card-light: rgba(255, 255, 255, 0.6);
    --color-card-dark: rgba(255, 255, 255, 0.2);
    --color-text-primary-light: #333333;
    --color-text-primary-dark: #E5E5E5;
    --color-text-secondary: #999999;
    --color-accent: #5856D6; /* System indigo */
    --color-accent-hover: #4745B8;
    --color-success: #34C759; /* System green */
    
    /* Gradient for CTA */
    --gradient-cta: linear-gradient(135deg, #5856D6 0%, #7C7CE5 100%);
}

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

@media (prefers-color-scheme: dark) {
    body {
        background-color: var(--color-bg-dark);
        color: var(--color-text-primary-dark);
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(248, 248, 248, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

@media (prefers-color-scheme: dark) {
    .header {
        background: rgba(18, 18, 18, 0.8);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 600;
}

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

@media (prefers-color-scheme: dark) {
    .logo-icon {
        filter: invert(1) brightness(1.1);
    }
}

.btn-download-header {
    padding: 0.5rem 1.5rem;
    background: var(--color-accent);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-download-header:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    padding: 10rem 0 6rem;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 200%;
    background: radial-gradient(circle, rgba(88, 86, 214, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.highlight {
    color: var(--color-accent);
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    color: var(--color-text-secondary);
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2.5rem;
    background: var(--color-accent);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 700;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(88, 86, 214, 0.3);
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(88, 86, 214, 0.4);
}

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

.hero-features {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-secondary);
}

.check-icon {
    width: 20px;
    height: 20px;
    stroke-width: 3;
    color: var(--color-success);
}

/* CTA Section */
.cta {
    padding: 6rem 0;
    background: var(--gradient-cta);
    text-align: center;
    position: relative;
}

.cta-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
    color: white;
}

.cta-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    margin-bottom: 3rem;
    color: rgba(255, 255, 255, 0.95);
}

.cta .btn-primary {
    background: white;
    color: var(--color-accent);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.cta .btn-primary:hover {
    background: rgba(255, 255, 255, 0.95);
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.25);
}

.cta-features {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.cta-features .feature-item {
    color: rgba(255, 255, 255, 0.9);
}

.cta-features .check-icon {
    color: white;
}

/* Footer */
.footer {
    background: var(--color-card-light);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 4rem 0 2rem;
}

@media (prefers-color-scheme: dark) {
    .footer {
        background: var(--color-card-dark);
    }
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand .logo {
    margin-bottom: 1rem;
}

.footer-tagline {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-column h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 0.5rem;
}

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

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

.footer-bottom {
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    padding-top: 2rem;
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

@media (prefers-color-scheme: dark) {
    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .hero {
        padding: 8rem 0 4rem;
    }

    .hero-features,
    .cta-features {
        flex-direction: column;
        gap: 1rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

    .btn-primary {
        padding: 0.875rem 2rem;
        font-size: 1rem;
    }
}