:root {
    --bg-color: #0a0a0a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-color: #3b82f6;
    /* A nice blue, evocative of technology/iOS */
    --accent-hover: #2563eb;
    --card-bg: #171717;
    --nav-height: 70px;
    --font-heading: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background-color: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    /* Safari support */
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    height: var(--nav-height);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

nav {
    display: flex;
    gap: 30px;
    align-items: center;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

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

.nav-download {
    color: var(--accent-color);
    font-weight: 600;
}

.nav-download:hover {
    color: var(--accent-hover);
}

/* Hero Section */
.hero {
    height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: var(--nav-height);
    background: radial-gradient(circle at center, #1a1a1a 0%, #0a0a0a 100%);
}

.hero h1 {
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    background: linear-gradient(to right, #ffffff, #a0a0a0);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: -2px;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
}

.app-icon {
    width: 120px;
    height: 120px;
    border-radius: 24px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.download-button {
    display: inline-flex;
    align-items: center;
    background-color: var(--text-primary);
    color: #000;
    padding: 14px 28px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.2s ease, opacity 0.2s ease;
    gap: 10px;
}

.download-button:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

/* Features */
.features {
    padding: 100px 0;
}

.feature-row {
    display: flex;
    align-items: center;
    gap: 80px;
    margin-bottom: 120px;
}

.feature-row.reverse {
    flex-direction: row-reverse;
}

.feature-text {
    flex: 1;
}

.feature-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.feature-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.feature-image {
    flex: 1;
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    transition: transform 0.4s ease;
}

.feature-image:hover {
    transform: scale(1.02);
}

.feature-image img {
    width: 100%;
    display: block;
    height: auto;
}

/* Support Section */
.support {
    padding: 100px 0;
    background-color: var(--card-bg);
    text-align: center;
}

.support h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.support p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 30px;
}

.contact-button {
    display: inline-block;
    border: 2px solid var(--text-secondary);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.contact-button:hover {
    border-color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

/* Privacy */
.privacy {
    padding: 100px 0;
}

.privacy h2 {
    font-size: 2.5rem;
    margin-bottom: 30px;
    text-align: left;
}

.privacy ul {
    list-style: none;
    margin-top: 20px;
}

.privacy li {
    margin-bottom: 15px;
    padding-left: 20px;
    border-left: 3px solid var(--accent-color);
    color: var(--text-secondary);
}

.privacy strong {
    color: var(--text-primary);
}

/* Footer */
footer {
    padding: 60px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
}

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

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .feature-row {
        flex-direction: column;
        gap: 40px;
        margin-bottom: 80px;
    }

    .feature-row.reverse {
        flex-direction: column;
    }

    .hero h1 {
        font-size: 2.8rem;
    }

    .header-content {
        padding: 0 20px;
    }
}