:root {
    --bg: #ffffff;
    --bg-card: #f5f5f7;
    --text: #1d1d1f;
    --text-muted: #6e6e73;
    --accent: #194BA0;
    --accent-light: #2560c4;
    --border: #d2d2d7;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav .logo {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--accent);
}

nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    margin-left: 1.5rem;
    transition: color 0.2s;
}

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

section {
    max-width: 720px;
    margin: 0 auto;
    padding: 5rem 1.5rem;
}

.hero {
    padding-top: 8rem;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 0.75rem;
    color: var(--accent);
}

.hero .subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.hero p {
    font-size: 1.05rem;
    color: var(--text-muted);
    max-width: 540px;
    margin: 0 auto 2rem;
}

.app-store-badge {
    display: inline-block;
    transition: opacity 0.2s;
}

.app-store-badge:hover {
    opacity: 0.8;
}

.app-store-badge img {
    height: 48px;
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.feature {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
}

.feature h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--accent);
}

.feature p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
}

h2 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
    color: var(--accent);
}

.privacy p, .contact p {
    color: var(--text-muted);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.privacy ul {
    list-style: none;
    padding: 0;
}

.privacy li {
    color: var(--text-muted);
    font-size: 0.95rem;
    padding: 0.4rem 0;
    padding-left: 1.25rem;
    position: relative;
}

.privacy li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.85rem;
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
}

.contact a {
    color: var(--accent-light);
    text-decoration: none;
}

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

footer {
    text-align: center;
    padding: 2rem 1.5rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
}

@media (max-width: 600px) {
    .hero h1 {
        font-size: 2.25rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    nav {
        padding: 0.75rem 1rem;
    }

    nav a {
        margin-left: 1rem;
        font-size: 0.8rem;
    }
}