:root {
    --bg: #0f172a;
    --card-bg: #1e293b;
    --text: #f8fafc;
    --accent: #38bdf8;
    --danger: #ef4444;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, sans-serif;
    background-color: var(--bg);
    color: var(--text);
}

.container {
    max-width: 1100px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}

.btn-primary { background: var(--accent); color: #000; }
.btn-danger { background: var(--danger); color: #fff; }
.hidden { display: none !important; }