:root {
    --primary-color: #6366f1;
    --secondary-color: #a855f7;
    --bg-dark: #0f172a;
    /* 半透明深色背景 */
    --card-bg: rgba(30, 41, 59, 0.75);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --success-color: #10b981;
    --danger-color: #ef4444;
}

html[data-theme="light"] {
    --bg-dark: #f0f9ff;
    /* 半透明浅色背景 */
    --card-bg: rgba(255, 255, 255, 0.75);
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border-color: rgba(255, 255, 255, 0.6);
}

/* 强制覆盖浅色模式下的组件背景和文字颜色 */
html[data-theme="light"] .sidebar,
html[data-theme="light"] .stat-card,
html[data-theme="light"] .content-panel,
html[data-theme="light"] .user-profile,
html[data-theme="light"] .logout-btn-top,
html[data-theme="light"] .modal-content,
html[data-theme="light"] .toast {
    background: rgba(255, 255, 255, 0.85);
    /* 增加不透明度 */
    border-color: rgba(255, 255, 255, 0.6);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
    /* 柔和阴影 */
}

/* 强制浅色模式下文字变黑 */
html[data-theme="light"] h1,
html[data-theme="light"] h2,
html[data-theme="light"] h3,
html[data-theme="light"] h4,
html[data-theme="light"] h5,
html[data-theme="light"] h6,
html[data-theme="light"] .panel-header h3,
html[data-theme="light"] .modal-header h3,
html[data-theme="light"] label,
html[data-theme="light"] .close-btn {
    color: #0f172a !important;
}

/* 强制浅色模式下输入框样式 */
html[data-theme="light"] input,
html[data-theme="light"] select,
html[data-theme="light"] textarea {
    background: rgba(255, 255, 255, 0.6) !important;
    border-color: #cbd5e1 !important;
    color: #0f172a !important;
}

html[data-theme="light"] input::placeholder {
    color: #94a3b8 !important;
}

html[data-theme="light"] .nav-item:hover {
    background: rgba(255, 255, 255, 0.5);
    color: #0f172a;
}

/* 修复模态框裁边和样式 */
.modal-content {
    background: var(--card-bg);
    width: 100%;
    max-width: 500px;
    border-radius: 12px;
    /* 减小圆角，更协调 */
    border: 1px solid var(--border-color);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    max-height: 90vh;
    /* 防止高度溢出屏幕 */
    overflow-y: auto;
    /* 内容过多时滚动 */
    margin: 1rem;
    display: flex;
    flex-direction: column;
}

html[data-theme="light"] .modal {
    background: rgba(0, 0, 0, 0.3);
    /* 稍微加深遮罩，突出模态框 */
    backdrop-filter: blur(4px);
    /* 降低模糊度，减少晕眩感 */
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-dark);
    /* 统一背景图设置 */
    background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.5) 0%, rgba(30, 41, 59, 0.5) 100%), url('bg.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
    color: var(--text-primary);
    line-height: 1.5;
}

/* Light Mode Background Override */
[data-theme="light"] body {
    background-image: linear-gradient(135deg, rgba(224, 242, 254, 0.4) 0%, rgba(240, 249, 255, 0.4) 100%), url('bg-light.png');
}

/* Dashboard Layout */
.dashboard-layout {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 50;
}

.sidebar-header {
    height: 64px;
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.sidebar-nav {
    flex: 1;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.2s;
    font-weight: 500;
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    font-size: 0.95rem;
}

.nav-item:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.nav-item.active {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
}

.nav-item.logout {
    color: var(--danger-color);
    margin-top: auto;
}

.nav-item.logout:hover {
    background: rgba(239, 68, 68, 0.1);
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 2rem;
    min-width: 0;
    /* 防止内容溢出 */
}

/* Top Bar */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    border: 1px solid var(--border-color);
}

.logout-btn-top {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: var(--danger-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1.1rem;
}

.logout-btn-top:hover {
    background: var(--danger-color);
    color: white;
    border-color: var(--danger-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.avatar {
    width: 32px;
    height: 32px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-icon.blue {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
}

.stat-icon.purple {
    background: rgba(168, 85, 247, 0.1);
    color: #a855f7;
}

.stat-icon.green {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
}

.stat-info h3 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.stat-info p {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Content Panel */
.content-panel {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.panel-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background 0.2s;
}

.btn-primary:hover {
    background: #4f46e5;
}

/* Table */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th {
    background: rgba(0, 0, 0, 0.2);
    padding: 1rem 1.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
}

td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

tr:last-child td {
    border-bottom: none;
}

.action-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 4px;
    transition: background 0.2s;
}

.edit-btn {
    color: var(--primary-color);
}

.edit-btn:hover {
    background: rgba(99, 102, 241, 0.1);
}

.delete-btn {
    color: var(--danger-color);
}

.delete-btn:hover {
    background: rgba(239, 68, 68, 0.1);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.modal.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: var(--card-bg);
    width: 100%;
    max-width: 500px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.25rem;
}

.close-btn:hover {
    color: var(--text-primary);
}

/* 统一模态框内表单的内边距 */
.modal-content form {
    padding: 1.5rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

input,
select,
textarea {
    width: 100%;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.625rem;
    color: var(--text-primary);
    font-size: 0.95rem;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.color-input-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.icon-preview-box {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-dark);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    flex-shrink: 0;
}

/* 浅色模式下图标预览框样式覆盖 */
html[data-theme="light"] .icon-preview-box {
    background: rgba(255, 255, 255, 0.6);
    border-color: #cbd5e1;
}

input[type="color"] {
    width: 40px;
    height: 40px;
    padding: 2px;
    cursor: pointer;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: 2rem;
}

/* Toast */
.toast-container {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toast {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 1rem 1.25rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    transform: translateX(120%);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast.show {
    transform: translateX(0);
}

.toast.success i {
    color: var(--success-color);
}

.toast.error i {
    color: var(--danger-color);
}