:root {
            --gold: #D4AF37;
            --gold-hover: #F9E29C;
            --white: #ffffff;
            --glass-bg: rgba(255, 255, 255, 0.1);
            --glass-border: rgba(255, 255, 255, 0.15);
            --transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', sans-serif; }
        body, html { height: 100%; width: 100%; overflow: hidden; background-color: #000; }
        
        .auth-bg { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: url('https://images.unsplash.com/photo-1512453979798-5ea266f8880c?q=80&w=2070') no-repeat center center/cover; z-index: -2; }
        .overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: radial-gradient(circle, rgba(0,0,0,0.4) 0%, rgba(0,0,0,0.8) 100%); z-index: -1; }

        .auth-container { height: 100vh; display: flex; justify-content: center; align-items: center; padding: 20px; }
        .auth-box { position: absolute; width: 100%; max-width: 400px; background: var(--glass-bg); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); padding: 40px; border-radius: 24px; border: 1px solid var(--glass-border); box-shadow: 0 25px 50px rgba(0,0,0,0.3); text-align: center; transition: var(--transition); opacity: 0; pointer-events: none; transform: translateY(30px) scale(0.95); }
        .auth-box.active { opacity: 1; pointer-events: auto; transform: translateY(0) scale(1); }

        h2 { color: var(--white); font-size: 2rem; margin-bottom: 8px; letter-spacing: -1px; }
        .subtitle { color: #ccc; font-size: 0.95rem; margin-bottom: 30px; }

        /* Error Message Styling */
        .error-banner { background: rgba(255, 70, 70, 0.2); color: #ff9999; padding: 10px; border-radius: 10px; border: 1px solid rgba(255, 0, 0, 0.2); margin-bottom: 20px; font-size: 0.85rem; }

        .input-group { position: relative; margin-bottom: 20px; }
        .input-group i { position: absolute; left: 15px; top: 50%; transform: translateY(-50%); color: var(--gold); font-size: 1rem; }
        .input-group input { width: 100%; padding: 15px 15px 15px 45px; background: rgba(255, 255, 255, 0.05); border: 1px solid var(--glass-border); border-radius: 12px; color: var(--white); font-size: 1rem; outline: none; transition: var(--transition); }
        .input-group input:focus { border-color: var(--gold); background: rgba(255, 255, 255, 0.1); }

        .btn.primary { width: 100%; padding: 15px; background: var(--gold); color: #000; border: none; border-radius: 12px; font-weight: 700; font-size: 1rem; cursor: pointer; transition: var(--transition); margin-top: 10px; }
        .btn.primary:hover { background: var(--gold-hover); transform: translateY(-2px); box-shadow: 0 10px 20px rgba(212, 175, 55, 0.3); }

        .switch { margin-top: 25px; color: #bbb; font-size: 0.9rem; }
        .switch span { color: var(--gold); font-weight: 600; cursor: pointer; text-decoration: underline; margin-left: 5px; }

        @media (max-width: 480px) { .auth-box { padding: 30px 20px; } }