/* 重置和基本样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

:root {
    --primary-color: #4361ee;
    --primary-dark: #3a56d4;
    --secondary-color: #7209b7;
    --text-color: #333;
    --text-light: #666;
    --border-color: #e0e0e0;
    --bg-color: #f8f9fa;
    --white: #ffffff;
    --error-color: #e63946;
    --success-color: #2a9d8f;
    --google-color: #db4437;
    --github-color: #333;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --radius: 12px;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: var(--text-color);
    line-height: 1.6;
}

/* 容器样式 */
.container {
    display: flex;
    max-width: 1200px;
    width: 100%;
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    min-height: 700px;
}

/* 登录表单区域 */
.login-wrapper {
    flex: 1;
    padding: 50px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.login-header {
    margin-bottom: 40px;
    text-align: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 15px;
}

.logo i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.login-header p {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* 表单样式 */
.login-form {
    width: 100%;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-color);
}

.form-group label i {
    color: var(--primary-color);
    font-size: 1.1rem;
}

.form-group input {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    outline: none;
}

.form-group input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

.password-wrapper {
    position: relative;
}

.toggle-password {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    font-size: 1.1rem;
    padding: 5px;
}

.toggle-password:hover {
    color: var(--primary-color);
}

.error-message {
    color: var(--error-color);
    font-size: 0.9rem;
    margin-top: 5px;
    min-height: 20px;
}

/* 表单选项 */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-light);
}

.remember-me input {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.forgot-password {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.forgot-password:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* 登录按钮 */
.login-btn {
    width: 100%;
    padding: 16px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 25px;
}

.login-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(67, 97, 238, 0.3);
}

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

/* 分割线 */
.divider {
    display: flex;
    align-items: center;
    margin: 25px 0;
    color: var(--text-light);
}

.divider::before,
.divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.divider span {
    padding: 0 15px;
    font-size: 0.9rem;
}

/* 社交登录按钮 */
.social-login {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 25px;
}

.social-btn {
    padding: 14px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: white;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.social-btn.google {
    color: var(--google-color);
}

.social-btn.google:hover {
    background: #fce8e6;
    border-color: var(--google-color);
}

.social-btn.github {
    color: var(--github-color);
}

.social-btn.github:hover {
    background: #f0f0f0;
    border-color: var(--github-color);
}

/* 注册链接 */
.register-link {
    text-align: center;
    color: var(--text-light);
    margin-top: 20px;
}

.register-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.register-link a:hover {
    text-decoration: underline;
}

/* 登录页脚 */
.login-footer {
    margin-top: 40px;
    text-align: center;
    color: var(--text-light);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}

.login-footer a {
    color: var(--primary-color);
    text-decoration: none;
    margin: 0 5px;
}

.login-footer a:hover {
    text-decoration: underline;
}

/* 欢迎区域 */
.welcome-section {
    flex: 1;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 60px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.welcome-content h2 {
    font-size: 2.2rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.welcome-content p {
    font-size: 1.1rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.features {
    list-style: none;
    margin-top: 30px;
}

.features li {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
    font-size: 1rem;
}

.features li i {
    color: #4cc9f0;
    font-size: 1.2rem;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .container {
        flex-direction: column;
        max-width: 600px;
    }
    
    .welcome-section {
        order: -1;
        padding: 40px 30px;
    }
    
    .login-wrapper {
        padding: 40px 30px;
    }
}

@media (max-width: 576px) {
    body {
        padding: 10px;
    }
    
    .container {
        border-radius: 8px;
    }
    
    .login-wrapper, .welcome-section {
        padding: 30px 20px;
    }
    
    .logo h1 {
        font-size: 1.7rem;
    }
    
    .welcome-content h2 {
        font-size: 1.8rem;
    }
    
    .form-options {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .social-login {
        flex-direction: column;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-wrapper, .welcome-section {
    animation: fadeIn 0.8s ease-out;
}

/* 输入验证样式 */
.form-group input:valid:not(:placeholder-shown) {
    border-color: var(--success-color);
}

.form-group input:invalid:not(:placeholder-shown) {
    border-color: var(--error-color);
}