/* 登录页面样式 */
:root {
    /* 使用动态主题配置，不再硬编码颜色 */
    --primary-color: var(--bs-primary);
    --primary-hover: color-mix(in srgb, var(--bs-primary) 85%, black);
    --primary-light: rgba(var(--bs-primary-rgb), 0.1);
    --secondary-color: var(--bs-secondary);
    --success-color: var(--bs-success);
    --danger-color: var(--bs-danger);
    --warning-color: var(--bs-warning);
    --info-color: var(--bs-info);
    --info-light: rgba(var(--bs-info-rgb), 0.1);
    --light-color: var(--bs-light);
    --dark-color: var(--bs-dark);
    --white: #ffffff;
    --black: #000000;
    
    /* 浅色主题 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --border-color: #dee2e6;
    --shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
}

/* 深色主题 */
[data-bs-theme="dark"] {
    --bg-primary: #212529;
    --bg-secondary: #343a40;
    --text-primary: #ffffff;
    --text-secondary: #adb5bd;
    --border-color: #495057;
    --shadow: 0 0.125rem 0.25rem rgba(255, 255, 255, 0.075);
    --shadow-lg: 0 1rem 3rem rgba(255, 255, 255, 0.175);
}

/* 全局样式 */
body {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    color: var(--text-primary);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    transition: all 0.3s ease;
}

/* 主题切换按钮 */
.theme-toggle {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1000;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.theme-toggle:hover {
    /* 移除transform以防止布局偏移 */
    box-shadow: var(--shadow-lg);
}

/* 登录容器 */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.1),
        0 8px 16px rgba(0, 0, 0, 0.05),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    width: 100%;
    max-width: 480px;
    padding: 3rem;
    backdrop-filter: blur(15px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
}

.login-card:hover {
    /* 移除transform以防止布局偏移 */
    box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, 0.2);
}

[data-bs-theme="dark"] .login-card:hover {
    box-shadow: 0 1.5rem 4rem rgba(255, 255, 255, 0.1);
}

/* Logo样式 */
.logo-image {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    object-fit: contain;
    background: var(--white);
    padding: 8px;
    margin: 0 auto 1.5rem;
    display: block;
}

.logo-image:hover {
    /* 移除transform以防止布局偏移 */
    box-shadow: 0 8px 25px rgba(40, 167, 69, 0.3);
}

/* 网站名称样式 */
.site-name {
    color: var(--text-primary);
    font-size: 2rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 网站描述样式 */
.site-description {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    margin-bottom: 1rem;
    opacity: 0.8;
    letter-spacing: 0.025em;
}

/* 标题样式 */
.login-title {
    color: var(--text-primary);
    font-size: 1.875rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 2.5rem;
    letter-spacing: -0.025em;
    position: relative;
}

.login-title::after {
    content: '';
    position: absolute;
    bottom: -0.75rem;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-hover));
    border-radius: 2px;
}

/* 表单组样式 */
.form-group {
    margin-bottom: 1.5rem;
}

/* 表单标签样式 */
.form-label {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    letter-spacing: 0.025em;
}

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

/* 输入框样式 */
.form-control {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    padding: 1rem 1.25rem;
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.form-control:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    /* 移除transform以防止布局偏移 */
}

.form-control:focus {
    background: var(--bg-primary);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(40, 167, 69, 0.15), 0 4px 12px rgba(40, 167, 69, 0.2);
    color: var(--text-primary);
    /* 移除transform以防止布局偏移 */
    outline: none;
}

.form-control::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.form-control:focus::placeholder {
    opacity: 0.5;
}

/* 输入组合样式 */
.input-group {
    display: flex;
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.input-group:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    /* 移除transform以防止布局偏移 */
}

.input-group:focus-within {
    box-shadow: 0 0 0 3px rgba(40, 167, 69, 0.15), 0 4px 12px rgba(40, 167, 69, 0.2);
    /* 移除transform以防止布局偏移 */
}

.input-group .form-control {
    border-radius: 0;
    box-shadow: none;
    transform: none;
    flex: 1;
}

.input-group .form-control:first-child {
    border-top-left-radius: 12px;
    border-bottom-left-radius: 12px;
}

.input-group .form-control:last-child {
    border-top-right-radius: 12px;
    border-bottom-right-radius: 12px;
}

.input-group .form-control:not(:first-child) {
    border-left: none;
}

.input-group .form-control:not(:last-child) {
    border-right: none;
}

.input-group .form-control:hover,
.input-group .form-control:focus {
    box-shadow: none;
    transform: none;
    border-color: var(--border-color);
    z-index: 2;
}

.input-group .form-select {
    border-radius: 0;
    min-width: 140px;
    box-shadow: none;
    transform: none;
}

.input-group .form-select:first-child {
    border-top-left-radius: 12px;
    border-bottom-left-radius: 12px;
}

.input-group .form-select:last-child {
    border-top-right-radius: 12px;
    border-bottom-right-radius: 12px;
}

.input-group .form-select:not(:first-child) {
    border-left: none;
}

.input-group .form-select:not(:last-child) {
    border-right: none;
}

.input-group .form-select:hover,
.input-group .form-select:focus {
    box-shadow: none;
    transform: none;
    border-color: var(--border-color);
    z-index: 2;
}

.input-group .input-group-text {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    font-weight: 500;
    border-radius: 0;
    box-shadow: none;
    transform: none;
}

.input-group .input-group-text:not(:first-child) {
    border-left: none;
}

.input-group .input-group-text:not(:last-child) {
    border-right: none;
}

.input-group .btn {
    border-radius: 0;
    box-shadow: none;
    transform: none;
    z-index: 3;
}

.input-group .btn:first-child {
    border-top-left-radius: 12px;
    border-bottom-left-radius: 12px;
}

.input-group .btn:last-child {
    border-top-right-radius: 12px;
    border-bottom-right-radius: 12px;
}

.input-group .btn:hover {
    transform: none;
    box-shadow: none;
}

/* 下拉选择框样式 */
.form-select {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    padding: 1rem 1.25rem;
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    cursor: pointer;
}

.form-select:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    /* 移除transform以防止布局偏移 */
}

.form-select:focus {
    background: var(--bg-primary);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(40, 167, 69, 0.15), 0 4px 12px rgba(40, 167, 69, 0.2);
    color: var(--text-primary);
    /* 移除transform以防止布局偏移 */
    outline: none;
}

/* 密码输入组 */
.password-input-group {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    z-index: 10;
    transition: color 0.3s ease;
}

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

.password-input-group .form-control {
    padding-right: 3rem;
}

/* 按钮样式 */
.btn {
    border-radius: 12px;
    font-weight: 600;
    padding: 1rem 1.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: white;
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-hover), #1e7e34);
    /* 移除transform以防止布局偏移 */
    box-shadow: 0 6px 20px rgba(40, 167, 69, 0.4);
}

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: white;
    /* 移除transform以防止布局偏移 */
    box-shadow: 0 6px 20px rgba(40, 167, 69, 0.3);
}

.btn-outline-secondary {
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    background: transparent;
}

.btn-outline-secondary:hover {
    background: var(--border-color);
    color: var(--text-primary);
    border-color: var(--border-color);
    /* 移除transform以防止布局偏移 */
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.btn:disabled::before {
    display: none;
}

/* 复选框样式 */
.form-check {
    margin-bottom: 1rem;
}

.form-check-input {
    border: 2px solid var(--border-color);
    border-radius: 4px;
    transition: all 0.3s ease;
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(40, 167, 69, 0.15);
    border-color: var(--primary-color);
}

.form-check-label {
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
}

/* 验证状态样式 */
.form-control.is-valid {
    border-color: var(--success-color);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%2328a745' d='m2.3 6.73.94-.94 1.38 1.38L7.7 4.09l.94.94L4.25 9.41z'/%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-invalid {
    border-color: var(--danger-color);
    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 d='m5.8 4.6 2.4 2.4M8.2 4.6l-2.4 2.4'/%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-check-input.is-invalid {
    border-color: var(--danger-color);
}

.invalid-feedback {
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.valid-feedback {
    color: var(--success-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* 提示信息样式 */
.form-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 0.75rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    border-left: 3px solid var(--info-color);
}

.form-text i {
    color: var(--info-color);
    font-size: 0.9em;
}

/* 警告框样式 */
.alert {
    border-radius: 8px;
    border: none;
    margin-bottom: 1.5rem;
    padding: 1rem;
    display: flex;
    align-items: center;
}

.alert-success {
    background: rgba(40, 167, 69, 0.1);
    color: var(--success-color);
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
    border-left: 4px solid var(--danger-color);
}

.alert i {
    margin-right: 0.5rem;
}

/* 注册链接样式 */
.register-link {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.register-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.register-link a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* 加载动画 */
.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

/* 响应式设计 */
@media (max-width: 576px) {
    .login-container {
        padding: 10px;
    }
    
    .login-card {
        padding: 1.5rem;
        margin: 10px;
    }
    
    .login-title {
        font-size: 1.5rem;
    }
    
    .theme-toggle {
        top: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
    }
}

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

.login-card {
    animation: fadeIn 0.6s ease-out;
}

/* 焦点可见性 */
.btn:focus,
.form-control:focus,
.form-select:focus,
.form-check-input:focus {
    outline: none;
}

/* 深色主题下的特殊样式调整 */
[data-theme="dark"] .form-control.is-valid {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%2320c997' d='m2.3 6.73.94-.94 1.38 1.38L7.7 4.09l.94.94L4.25 9.41z'/%3e%3c/svg%3e");
}

[data-theme="dark"] .form-control.is-invalid {
    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='%23e74c3c'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath d='m5.8 4.6 2.4 2.4M8.2 4.6l-2.4 2.4'/%3e%3c/svg%3e");
}

/* 暗态下的文字颜色适配 */
[data-theme="dark"] .text-center {
    color: var(--text-primary);
}

[data-theme="dark"] .text-center a {
    color: var(--primary-color);
}

[data-theme="dark"] .text-center a:hover {
    color: var(--primary-hover);
}

[data-theme="dark"] .text-muted {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] p {
    color: var(--text-primary);
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}