/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #818cf8;
    --secondary-color: #6b7280;
    --success-color: #059669;
    --error-color: #dc2626;
    --warning-color: #d97706;
    --info-color: #0d6efd;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.375rem;
    --border-radius-lg: 0.5rem;
    --border-radius-xl: 0.75rem;
    --border-radius-2xl: 1rem;
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #818cf8;
        --primary-dark: #6366f1;
        --primary-light: #a5b4fc;
        --secondary-color: #9ca3af;
        --success-color: #34d399;
        --error-color: #f87171;
        --warning-color: #fbbf24;
        --info-color: #60a5fa;
        --bg-primary: #1f2937;
        --bg-secondary: #111827;
        --text-primary: #f9fafb;
        --text-secondary: #d1d5db;
        --border-color: #374151;
        --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
    }
    
    body.dark-mode {
        background-color: var(--bg-secondary);
        color: var(--text-primary);
    }
    
    .dark-mode .navbar,
    .dark-mode .card,
    .dark-mode .alert {
        background-color: var(--bg-primary);
        color: var(--text-primary);
    }
    
    .dark-mode table th {
        background-color: var(--bg-primary);
    }
    
    .dark-mode input,
    .dark-mode select,
    .dark-mode textarea {
        background-color: var(--bg-secondary);
        color: var(--text-primary);
        border-color: var(--border-color);
    }
    
    .dark-mode .footer {
        background-color: #111827;
    }
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    transition: background-color var(--transition-normal), color var(--transition-normal);
    font-size: 16px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 页面加载动画 */
body {
    opacity: 0;
    animation: fadeIn 0.5s ease-in-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: #4b5563;
}

/* 标题样式 */
h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.2;
}

h1 {
    font-size: 2.25rem;
}

h2 {
    font-size: 1.875rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    min-width: 80px;
    min-height: 40px;
}

.btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.btn:active {
    transform: translateY(1px);
}

/* 按钮悬停效果 */
.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 var(--transition-fast);
}

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

/* 主要按钮 */
.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
}

/* 次要按钮 */
.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #4b5563;
    box-shadow: 0 4px 12px rgba(107, 114, 128, 0.4);
}

/* 按钮选中状态 */
.btn.active {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
}

.btn-secondary.active {
    background-color: var(--primary-color);
    color: white;
}

/* 危险按钮 */
.btn-danger {
    background-color: var(--error-color);
    color: white;
}

.btn-danger:hover {
    background-color: #b91c1c;
    box-shadow: 0 4px 12px rgba(220, 38, 38, 0.4);
}

/* 成功按钮 */
.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-success:hover {
    background-color: #047857;
    box-shadow: 0 4px 12px rgba(5, 150, 105, 0.4);
}

/* 警告按钮 */
.btn-warning {
    background-color: var(--warning-color);
    color: white;
}

.btn-warning:hover {
    background-color: #92400e;
    box-shadow: 0 4px 12px rgba(217, 119, 6, 0.4);
}

/* 信息按钮 */
.btn-info {
    background-color: var(--info-color);
    color: white;
}

.btn-info:hover {
    background-color: #025aa5;
    box-shadow: 0 4px 12px rgba(13, 110, 253, 0.4);
}

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

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
select,
textarea,
.form-input,
.form-select {
    width: 100%;
    padding: 3px 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-normal);
}

/* 隐藏number输入框的上下箭头 */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
}

input:focus,
select:focus,
textarea:focus,
.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.5);
    transform: none;
}

input::placeholder,
textarea::placeholder {
    color: var(--text-secondary);
}

/* 禁用状态 */
input:disabled,
select:disabled,
textarea:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background-color: var(--bg-secondary);
}

/* 表格样式 */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-normal);
}

table:hover {
    box-shadow: var(--shadow-md);
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-fast);
}

th {
    background-color: var(--bg-primary);
    font-weight: 600;
    color: var(--text-primary);
    position: relative;
    user-select: none;
    cursor: pointer;
    white-space: nowrap;
}

th:hover {
    background-color: var(--bg-secondary);
}

/* 排序指示器 */
th::after {
    content: '';
    margin-left: 0;
}

th.sortable:hover::after {
    opacity: 0;
}

th.sorted-asc::after {
    content: '';
}

th.sorted-desc::after {
    content: '';
}

tr {
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

tr:hover {
    background-color: var(--bg-secondary);
    transform: translateX(2px);
}

/* 表格行动画 */
tr {
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 卡片样式 */
.card {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-md);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    border: 1px solid transparent;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
    border-color: var(--border-color);
}

/* 卡片渐变边框效果 */
.card::before {
    content: '';
    position: absolute;
    inset: -1px;
    z-index: -1;
    border-radius: var(--border-radius-xl);
    background: linear-gradient(45deg, var(--primary-color), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.card:hover::before {
    opacity: 1;
}

/* 状态标签 */
.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.375rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-normal);
    border: 1px solid transparent;
}

.status-badge:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-sm);
}

.status-draft {
    background-color: #f3f4f6;
    color: #6b7280;
}

.status-pending {
    background-color: #feebc8;
    color: #d97706;
}

.status-confirmed {
    background-color: #cfe2ff;
    color: #0d6efd;
}

.status-completed {
    background-color: #d1fae5;
    color: #059669;
}

.status-cancelled {
    background-color: #fee2e2;
    color: #dc2626;
}

/* 响应式设计增强 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
    
    .card {
        padding: 1rem;
        border-radius: var(--border-radius-lg);
    }
    
    .btn {
        font-size: 0.875rem;
        padding: 0.5rem 0.75rem;
    }
    
    h1 {
        font-size: 1.875rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    h3 {
        font-size: 1.25rem;
    }
}

/* 导航栏样式 */
.navbar {
    background-color: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    font-size: 1.25rem;
    font-weight: 600;
    text-decoration: none;
    color: #4f46e5;
}

.navbar-nav {
    display: flex;
    list-style: none;
}

.navbar-nav li {
    margin-left: 1.5rem;
}

.navbar-nav a {
    text-decoration: none;
    color: #333;
    transition: color 0.3s ease;
}

.navbar-nav a:hover {
    color: #4f46e5;
}

/* 页脚样式 */
.footer {
    background-color: #374151;
    color: white;
    padding: 2rem 0;
    margin-top: 2rem;
}

.footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* 消息提示 */
.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.alert-success {
    background-color: #d1fae5;
    color: #059669;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background-color: #fee2e2;
    color: #dc2626;
    border: 1px solid #fecaca;
}

.alert-warning {
    background-color: #fef3c7;
    color: #d97706;
    border: 1px solid #fde68a;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #4f46e5;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}