* {
            box-sizing: border-box;
            font-family: 'Tahoma', Arial, sans-serif;
        }

        body {
            margin: 0;
            min-height: 100vh;
            background: linear-gradient(135deg, #f2f4f7, #e5e9f0);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .login-box {
            background: #fff;
            width: 100%;
            max-width: 380px;
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
        }

        .login-box h2 {
            text-align: center;
            margin-bottom: 25px;
            color: #333;
        }

        .login-box input {
            width: 100%;
            padding: 12px 14px;
            margin-bottom: 15px;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 15px;
            transition: 0.3s;
        }

        .login-box input:focus {
            outline: none;
            border-color: #4f46e5;
            box-shadow: 0 0 0 2px rgba(79,70,229,0.15);
        }

        .login-box button {
            width: 100%;
            padding: 12px;
            background: #4f46e5;
            color: #fff;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            cursor: pointer;
            transition: 0.3s;
        }

        .login-box button:hover {
            background: #4338ca;
        }

        .error {
            background: #fee2e2;
            color: #991b1b;
            padding: 10px;
            border-radius: 8px;
            margin-bottom: 15px;
            font-size: 14px;
            text-align: center;
        }