:root { --accent: #ff4757; --bg: #020617; }
        body { background-color: var(--bg); font-family: 'Fira Code', monospace; color: #e2e8f0; display: flex; align-items: center; justify-content: center; min-height: 100vh; margin: 0; padding: 20px; }
        .login-card { background: #0f172a; border: 1px solid #1e293b; padding: 2.5rem; border-radius: 12px; width: 100%; max-width: 400px; box-shadow: 0 10px 25px rgba(0,0,0,0.5); }
        .brand { color: var(--accent); font-weight: bold; font-size: 1.5rem; text-align: center; margin-bottom: 2rem; border-bottom: 2px solid var(--accent); display: inline-block; width: 100%; }
        .form-control { background: #1e293b; border: 1px solid #334155; color: white; border-radius: 6px; }
        .form-control:focus { background: #1e293b; border-color: var(--accent); box-shadow: none; color: white; }
        .btn-primary { background: var(--accent); border: none; font-weight: bold; padding: 0.8rem; }
        .btn-primary:hover { background: #e84118; }
        .error-msg { color: #ff4757; background: rgba(255, 71, 87, 0.1); border: 1px solid var(--accent); padding: 10px; border-radius: 6px; margin-bottom: 1rem; font-size: 0.9rem; text-align: center; }
        .ok-msg { color: #22c55e; background: rgba(34, 197, 94, 0.1); border: 1px solid #22c55e; padding: 10px; border-radius: 6px; margin-bottom: 1rem; font-size: 0.85rem; text-align: center; }