/* 主样式文件 */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #06b6d4;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    line-height: 1.5;
}

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 布局 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.container-fluid {
    width: 100%;
    padding: 0 1rem;
}

/* 网格系统 */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -0.5rem;
}

.col {
    flex: 1;
    padding: 0 0.5rem;
}

.col-auto {
    flex: 0 0 auto;
    padding: 0 0.5rem;
}

.col-1 { flex: 0 0 8.333333%; }
.col-2 { flex: 0 0 16.666667%; }
.col-3 { flex: 0 0 25%; }
.col-4 { flex: 0 0 33.333333%; }
.col-6 { flex: 0 0 50%; }
.col-8 { flex: 0 0 66.666667%; }
.col-9 { flex: 0 0 75%; }
.col-12 { flex: 0 0 100%; }

/* 间距 */
.m-0 { margin: 0; }
.m-1 { margin: 0.25rem; }
.m-2 { margin: 0.5rem; }
.m-3 { margin: 0.75rem; }
.m-4 { margin: 1rem; }
.m-5 { margin: 1.25rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-5 { margin-top: 1.25rem; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-5 { margin-bottom: 1.25rem; }

.p-0 { padding: 0; }
.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-5 { padding: 1.25rem; }

/* 文本 */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

.text-primary { color: var(--primary-color); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success-color); }
.text-warning { color: var(--warning-color); }
.text-danger { color: var(--danger-color); }

.font-weight-normal { font-weight: 400; }
.font-weight-medium { font-weight: 500; }
.font-weight-semibold { font-weight: 600; }
.font-weight-bold { font-weight: 700; }

.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.25rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease-in-out;
    user-select: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

.btn-secondary {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--bg-tertiary);
}

.btn-success {
    background-color: var(--success-color);
    color: white;
    border-color: var(--success-color);
}

.btn-warning {
    background-color: var(--warning-color);
    color: white;
    border-color: var(--warning-color);
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
    border-color: var(--danger-color);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

/* 表单 */
.form-group {
    margin-bottom: 1rem;
}

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

.form-control {
    display: block;
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    line-height: 1.25rem;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

/* 卡片 */
.card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

/* 表格 */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}

.table th,
.table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    font-weight: 600;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
}

.table tbody tr:hover {
    background-color: var(--bg-tertiary);
}

/* 徽章 */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
}

.badge-primary {
    background-color: rgb(37 99 235 / 0.1);
    color: var(--primary-color);
}

.badge-success {
    background-color: rgb(16 185 129 / 0.1);
    color: var(--success-color);
}

.badge-warning {
    background-color: rgb(245 158 11 / 0.1);
    color: var(--warning-color);
}

.badge-danger {
    background-color: rgb(239 68 68 / 0.1);
    color: var(--danger-color);
}

/* 警告框 */
.alert {
    padding: 0.75rem 1rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
}

.alert-success {
    background-color: rgb(16 185 129 / 0.1);
    border-color: rgb(16 185 129 / 0.2);
    color: #065f46;
}

.alert-warning {
    background-color: rgb(245 158 11 / 0.1);
    border-color: rgb(245 158 11 / 0.2);
    color: #92400e;
}

.alert-danger {
    background-color: rgb(239 68 68 / 0.1);
    border-color: rgb(239 68 68 / 0.2);
    color: #991b1b;
}

.alert-info {
    background-color: rgb(6 182 212 / 0.1);
    border-color: rgb(6 182 212 / 0.2);
    color: #0e7490;
}

/* 工具类 */
.d-none { display: none; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }

.justify-content-start { justify-content: flex-start; }
.justify-content-center { justify-content: center; }
.justify-content-end { justify-content: flex-end; }
.justify-content-between { justify-content: space-between; }

.align-items-start { align-items: flex-start; }
.align-items-center { align-items: center; }
.align-items-end { align-items: flex-end; }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

/* 响应式 */
@media (max-width: 768px) {
    .container {
        padding: 0 0.75rem;
    }
    
    .col-md-6 {
        flex: 0 0 50%;
    }
    
    .col-md-12 {
        flex: 0 0 100%;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .table {
        font-size: 0.875rem;
    }
    
    .card-body {
        padding: 1rem;
    }
}

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

@keyframes slideIn {
    from { transform: translateY(-10px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

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

.slide-in {
    animation: slideIn 0.3s ease-in-out;
}