* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.app-container {
    width: 100%;
    max-width: 400px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.content {
    width: 100%;
}

#login-view {
    width: 100%;
}

#register-view {
    width: 100%;
}

.login-card {
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 30px 25px;
    width: 100%;
    max-width: 380px;
    margin: 0 auto;
}

.login-card h2 {
    text-align: center;
    color: #333;
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}

.login-card .subtitle {
    text-align: center;
    color: #666;
    font-size: 13px;
    margin-bottom: 24px;
}

.error {
    background-color: #fee;
    border: 1px solid #fcc;
    color: #c33;
    padding: 10px 14px;
    border-radius: 4px;
    margin-bottom: 16px;
    font-size: 13px;
    text-align: center;
}

.error.hidden {
    display: none;
}

.hidden {
    display: none;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    color: #333;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 6px;
}

.form-group input {
    width: 100%;
    padding: 11px 14px;
    border: 2px solid #e0e0e0;
    border-radius: 4px;
    font-size: 14px;
    transition: all 0.3s ease;
    background-color: #fafafa;
    color: #333;
}

.form-group input:focus {
    outline: none;
    border-color: #42a5f5;
    background-color: #fff;
    box-shadow: 0 0 0 3px rgba(66, 165, 245, 0.1);
}

.form-group input::placeholder {
    color: #999;
}

.login-button {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #42a5f5 0%, #1e88e5 100%);
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 8px;
    box-shadow: 0 4px 15px rgba(66, 165, 245, 0.4);
}

.login-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(66, 165, 245, 0.6);
}

.login-button:active {
    transform: translateY(0);
}

/* �ƶ�����Ӧʽ��� */
@media (max-width: 768px) {
    body {
        padding: 15px;
        background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    }

    .login-card {
        padding: 25px 18px;
        border-radius: 6px;
        box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
    }

    .login-card h2 {
        font-size: 22px;
        margin-bottom: 6px;
    }

    .login-card .subtitle {
        font-size: 12px;
        margin-bottom: 20px;
    }

    .form-group {
        margin-bottom: 16px;
    }

    .form-group input {
        padding: 10px 12px;
        font-size: 14px;
        border-radius: 4px;
    }

    .login-button {
        padding: 11px;
        font-size: 14px;
        border-radius: 4px;
    }
}

@media (max-width: 480px) {
    .login-card {
        padding: 22px 16px;
        border-radius: 6px;
    }

    .login-card h2 {
        font-size: 20px;
    }

    .form-group input {
        padding: 10px;
    }

    .login-button {
        padding: 11px;
    }
}

/* С��Ļ�豸�Ż� */
@media (max-width: 360px) {
    body {
        padding: 10px;
    }

    .login-card {
        padding: 18px 14px;
    }

    .login-card h2 {
        font-size: 18px;
    }
}