.login-container {
    max-width: 400px;
    margin: 50px auto;
    background-color: var(--container-bg, #fff);
    border-radius: var(--border-radius, 5px);
    box-shadow: 0 2px 10px var(--shadow-color, rgba(0,0,0,0.1));
    padding: 30px;
}

/* 登录页面特定样式 */
.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    font-size: 28px;
    color: var(--heading-color, #333);
    margin-bottom: 10px;
    border: none;
}

.login-header p {
    color: var(--text-color, #666);
}

.form-check {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 20px 0;
}

.form-check-input {
    margin-top: 0;
}

.form-check-label {
    font-size: 14px;
    color: var(--text-color, #666);
}

.login-footer {
    text-align: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color, #eee);
}

.login-footer p {
    margin-bottom: 10px;
    color: var(--text-color, #666);
}

.btn {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    font-weight: 500;
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-form label, .form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: var(--text-color, #555);
}

.login-form input, .form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--input-border-color, #ddd);
    border-radius: var(--border-radius, 4px);
    font-size: 16px;
    background-color: var(--input-bg, #fff);
    color: var(--input-text-color, #333);
}

.login-form input:focus, .form-control:focus {
    border-color: var(--primary-color, #007bff);
    outline: none;
}

.login-form button, .btn {
    width: 100%;
    padding: 12px;
    background-color: var(--primary-color, #007bff);
    color: var(--btn-text-color, #fff);
    border: none;
    border-radius: var(--border-radius, 4px);
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.login-form button:hover, .btn:hover {
    background-color: var(--primary-hover-color, #0069d9);
}

.login-footer {
    text-align: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color, #eee);
}

.login-footer p {
    margin-bottom: 10px;
    color: var(--text-color, #666);
}

.login-footer a {
    color: var(--link-color, #007bff);
    text-decoration: none;
}

.login-footer a:hover {
    text-decoration: underline;
    color: var(--link-hover-color, #0056b3);
}

.alert {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 4px;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.remember-me {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.remember-me input {
    width: auto;
    margin-right: 10px;
}

.remember-me label {
    margin-bottom: 0;
    font-weight: normal;
    color: var(--text-color, #555);
}

/* 登录页面特定样式 */
.card {
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.card-header {
    background-color: var(--primary-color, #4a6fa5);
    color: white;
    font-weight: bold;
    padding: 15px 20px;
}

.card-body {
    padding: 25px;
}

.btn-primary {
    background-color: var(--primary-color, #4a6fa5);
    border-color: var(--primary-color, #4a6fa5);
    padding: 10px;
    font-weight: bold;
}

.btn-primary:hover {
    background-color: var(--primary-color, #4a6fa5);
    opacity: 0.9;
}

.form-control:focus {
    border-color: var(--primary-color, #4a6fa5);
    box-shadow: 0 0 0 0.25rem rgba(74, 111, 165, 0.25);
}

/* 验证样式 */
.input-group-text {
    background-color: transparent;
    border-left: none;
}

.form-control.is-invalid {
    border-color: var(--error-color, #dc3545);
    padding-right: calc(1.5em + 0.75rem);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23dc3545'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.form-control.is-valid {
    border-color: var(--success-color, #198754);
    padding-right: calc(1.5em + 0.75rem);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%23198754' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.form-control.is-validating {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath fill='%23aaa' d='M12,4V2A10,10 0 0,0 2,12H4A8,8 0 0,1 12,4Z'%3E%3CanimateTransform attributeName='transform' type='rotate' from='0 12 12' to='360 12 12' dur='1s' repeatCount='indefinite'/%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 20px;
}

/* 图标样式 */
.fa-check-circle {
    color: var(--success-color, #198754);
}

.fa-times-circle {
    color: var(--error-color, #dc3545);
}

.password-toggle {
    cursor: pointer;
    color: var(--text-color, #666);
    margin-left: 5px;
}

.password-toggle:hover {
    color: var(--primary-color, #4a6fa5);
}

/* 验证提示文本 */
.form-text.text-danger {
    color: var(--error-color, #dc3545) !important;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.form-text.text-success {
    color: var(--success-color, #198754) !important;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* 验证码样式 */
#captcha-img {
    border-radius: 0 var(--border-radius, 4px) var(--border-radius, 4px) 0;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.3s;
}

#captcha-img:hover {
    opacity: 0.8;
}

/* 输入组样式优化 */
.input-group {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    width: 100%;
}

.input-group > .form-control {
    position: relative;
    flex: 1 1 auto;
    width: 1%;
    min-width: 0;
}

.input-group-text {
    display: flex;
    align-items: center;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    text-align: center;
    white-space: nowrap;
    border: 1px solid var(--input-border-color, #ddd);
    border-radius: 0 var(--border-radius, 4px) var(--border-radius, 4px) 0;
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.form-text {
    animation: fadeIn 0.3s ease-in-out;
}

/* 主题切换按钮样式 */
.theme-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}

.theme-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-color, #4a6fa5);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    transition: transform 0.3s, background-color 0.3s;
}

.theme-btn:hover {
    transform: scale(1.1);
    background-color: var(--primary-hover-color, #3a5a8c);
}

.theme-btn svg {
    transition: transform 0.5s;
}

.theme-btn:hover svg {
    transform: rotate(30deg);
}

/* 响应式调整 */
@media (max-width: 576px) {
    .login-container {
        margin: 20px auto;
        padding: 20px;
    }
    
    .login-header h1 {
        font-size: 24px;
    }
    
    .theme-toggle {
        bottom: 10px;
        right: 10px;
    }
    
    .theme-btn {
        width: 35px;
        height: 35px;
    }
}