:root {
    --bg: #0f172a;
    --card: #1e293b;
    --accent: #38bdf8;
    --danger: #f87171;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --border: #334155;
}

* { box-sizing: border-box; }

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    margin: 0;
    background: linear-gradient(180deg, #0f172a 0%, #111b2f 50%, #12203a 100%);
    color: var(--text);
}

.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.auth-card {
    background: var(--card);
    border: 1px solid var(--border);
    padding: 2rem;
    border-radius: 12px;
    width: 320px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.4);
    text-align: left;
}

.auth-card h1 {
    margin: 0 0 0.5rem;
}

.auth-card p.muted {
    color: var(--muted);
    margin: 0 0 1rem;
}

.auth-card form {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.auth-card label {
    font-size: 0.9rem;
    color: var(--muted);
}

.auth-card input {
    padding: 0.5rem 0.8rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: rgba(15,23,42,0.6);
    color: var(--text);
}

.btn.primary {
    background: var(--accent);
    border: none;
    color: #0f172a;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 0.5rem;
}

.alert-danger {
    background: rgba(248,113,113,0.15);
    color: #fca5a5;
    border: 1px solid rgba(248,113,113,0.3);
}