* {
            box-sizing: border-box;
        }

        body {
            margin: 0;
            min-height: 100vh;
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            background: linear-gradient(135deg, #FFD54F, #FFEB3B);
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 16px;
        }

        .login-box {
            background: #ffffff;
            width: 100%;
            max-width: 380px;
            padding: 32px 24px;
            border-radius: 14px;
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
        }

        .login-box h2 {
            text-align: center;
            margin-bottom: 20px;
            color: #F9A825;
            font-size: 1.6rem;
        }

        .error {
            background: #fff1f2;
            color: #9f1239;
            border: 1px solid #fda4af;
            border-left: 5px solid #e11d48;
            padding: 12px 14px;
            border-radius: 8px;
            margin-bottom: 16px;
            font-size: 0.95rem;
            font-weight: 700;
            line-height: 1.35;
        }

        .login-box input {
            width: 100%;
            padding: 14px 16px;
            margin-bottom: 16px;
            border-radius: 10px;
            border: 1px solid #ddd;
            font-size: 1rem;
        }

        .login-box input:focus {
            outline: none;
            border-color: #FBC02D;
            box-shadow: 0 0 6px rgba(251, 192, 45, 0.5);
        }

        .login-box button {
            width: 100%;
            padding: 14px;
            background: #FBC02D;
            border: none;
            border-radius: 10px;
            color: #000;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s ease, transform 0.1s ease;
        }

        .login-box button:hover {
            background: #F9A825;
        }

        .login-box button:active {
            transform: scale(0.98);
        }

        .footer-text {
            text-align: center;
            margin-top: 18px;
            font-size: 0.8rem;
            color: #999;
        }

        .auth-link {
            text-align: center;
            margin-top: 16px;
            font-size: 0.95rem;
            color: #555;
        }

        .auth-link a {
            color: #F9A825;
            font-weight: 700;
            text-decoration: none;
        }

        @media (min-width: 768px) {
            .login-box {
                padding: 40px;
            }

            .login-box h2 {
                font-size: 1.8rem;
            }
        }