:root {
    --primary: #2F6BFF;
    --primary-dark: #1C4FD7;
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --bg: #F3F6FB;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --divider: #E5E7EB;
    --section-gap: 20px;
    --card-gap: 16px;
    --container-width: 800px;
    --navbar-height: 64px;
    --hero-height: 120px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.5;
}

/* Navbar */
.navbar {
    height: var(--navbar-height);
    background: white;
    border-bottom: 1px solid var(--divider);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 16px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.navbar-logo {
    width: 32px;
    height: 32px;
    color: var(--primary);
    flex-shrink: 0;
}

.navbar-site-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 20px;
}

.navbar-menu a {
    font-size: 14px;
    color: #374151;
    text-decoration: none;
    cursor: pointer;
}

.navbar-menu a:hover,
.navbar-menu a.active {
    color: var(--primary);
}

.btn-android {
    background: #34A853;
    color: white;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 6px;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.btn-android svg {
    width: 16px;
    height: 16px;
}

/* Main */
.main {
    max-width: var(--container-width);
    margin: 40px auto;
    padding: 0 16px;
    display: flex;
    flex-direction: column;
    gap: var(--section-gap);
}


/* Download App */
.download-card {
    background: white;
    border-radius: 14px;
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
    margin-top: var(--card-gap);
    gap: 16px;
}

.download-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.download-android-icon {
    width: 40px;
    height: 40px;
    color: #34A853;
    flex-shrink: 0;
}

.download-title {
    font-size: 16px;
    font-weight: 600;
    color: #1F2937;
    margin: 0;
}

.download-subtitle {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.download-badge {
    height: 48px;
    cursor: pointer;
    display: block;
}

/* Card */
.card {
    background: white;
    border-radius: 14px;
    padding: 18px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    margin-top: -30px;
}


/* Footer */
.footer {
    text-align: center;
    margin-top: 24px;
    padding-bottom: 24px;
    font-size: 13px;
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 8px;
}

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

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

/* Responsive */
@media (max-width: 768px) {
    .main {
        margin: 20px auto;
        padding: 0 12px;
    }
    .card {
        margin-top: -20px;
        padding: 14px;
    }
}

@media (max-width: 480px) {
    .navbar-site-name {
        font-size: 16px;
    }

    .btn-android span {
        display: none;
    }
}