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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: #111;
    color: #e0e0e0;
    min-height: 100vh;
    padding: 2rem 1rem;
}

.container {
    max-width: 600px;
    margin: 0 auto;
}

h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: #fff;
}

.subtitle {
    color: #888;
    margin-bottom: 2rem;
}

.card {
    background: #1a1a1a;
    border: 1px solid #333;
    border-radius: 12px;
    padding: 1.25rem;
    margin-bottom: 1rem;
}

.card h2 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
    color: #fff;
}

.card .platform {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 0.75rem;
}

.btn {
    display: inline-block;
    padding: 0.6rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: opacity 0.2s;
}

.btn:hover { opacity: 0.85; }

.btn-mac    { background: #2563eb; color: #fff; }
.btn-android { background: #16a34a; color: #fff; }
.btn-ios    { background: #9333ea; color: #fff; }
.btn-udid   { background: #d97706; color: #fff; }

.card .note {
    font-size: 0.8rem;
    color: #666;
    margin-top: 0.5rem;
}

.udid-steps {
    font-size: 0.85rem;
    color: #aaa;
    line-height: 1.6;
    margin-bottom: 0.75rem;
}

.udid-steps ol {
    padding-left: 1.25rem;
}

footer {
    text-align: center;
    color: #444;
    font-size: 0.75rem;
    margin-top: 2rem;
}