@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --bg: #ffffff;
    --text: #171717;
    --text-muted: #4b5563;
    --accent: #f8fafc;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --glass: rgba(255, 255, 255, 0.8);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0f172a;
        --text: #f8fafc;
        --text-muted: #94a3b8;
        --accent: #1e293b;
        --border: #334155;
        --shadow: 0 10px 15px -3px rgb(0 0 0 / 0.3);
        --glass: rgba(15, 23, 42, 0.8);
    }
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background-color: var(--bg);
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
header {
    padding: 2rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    background: var(--glass);
    border-bottom: 1px solid var(--border);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    transition: color 0.2s;
    margin-left: 1.5rem;
}

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

/* Hero */
.hero {
    padding: 6rem 0 4rem;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero p {
    font-size: 1.5rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 2.5rem;
}

/* Features Grid */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding-bottom: 4rem;
}

.feature-card {
    padding: 2.5rem;
    border-radius: 1.5rem;
    background: var(--accent);
    border: 1px solid var(--border);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

/* Content Page (Privacy) */
.content-page {
    padding: 4rem 0;
    max-width: 800px;
}

.content-page h1 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

.content-page h2 {
    font-size: 1.5rem;
    margin: 2rem 0 1rem;
}

.content-section {
    padding: 2rem;
    background: var(--accent);
    border-radius: 1rem;
    border: 1px solid var(--border);
    margin-bottom: 2rem;
}

.content-section ul {
    list-style: none;
}

.content-section li {
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
}

.content-section li::before {
    content: "•";
    color: var(--primary);
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* Footer */
footer {
    padding: 4rem 0;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Buttons */
.hero-cta {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 1.25rem 2.5rem;
    border-radius: 9999px;
    font-weight: 600;
    font-size: 1.1rem;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
}

.btn-primary {
    background: var(--primary);
    color: white;
    border: 1px solid var(--primary);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 2px solid var(--border);
}

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

@media (max-width: 640px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.25rem;
    }
}