/* ============================================
   TDesign 风格 CSS 框架
   基于 TDesign Web 设计系统还原
   https://tdesign.tencent.com/
   ============================================ */

/* --- Design Tokens --- */
:root {
    /* Brand */
    --td-brand-color: #0052d9;
    --td-brand-color-hover: #003cab;
    --td-brand-color-active: #002f7a;
    --td-brand-color-light: #e8f3ff;
    --td-brand-color-focus: #d9e6ff;
    --td-brand-color-disabled: #bbd3fb;

    /* Success / Warning / Error */
    --td-success-color: #2ba471;
    --td-success-color-light: #e3f9e9;
    --td-warning-color: #e37318;
    --td-warning-color-light: #fff0e2;
    --td-error-color: #d54941;
    --td-error-color-light: #fdecee;

    /* Text */
    --td-text-color-primary: #181818;
    --td-text-color-secondary: #595959;
    --td-text-color-placeholder: #8c8c8c;
    --td-text-color-disabled: #c5c5c5;
    --td-text-color-on-brand: #ffffff;

    /* Background */
    --td-bg-color-page: #f6f6f6;
    --td-bg-color-container: #ffffff;
    --td-bg-color-secondary: #f6f6f6;
    --td-bg-color-hover: #f3f3f3;

    /* Border */
    --td-border-level-1: #f0f0f0;
    --td-border-level-2: #e7e7e7;
    --td-component-border: #e7e7e7;

    /* Radius */
    --td-radius-small: 2px;
    --td-radius-default: 3px;
    --td-radius-medium: 6px;
    --td-radius-large: 9px;
    --td-radius-round: 999px;

    /* Shadow */
    --td-shadow-1: 0 1px 4px rgba(0,0,0,0.06);
    --td-shadow-2: 0 2px 8px rgba(0,0,0,0.08);
    --td-shadow-3: 0 4px 16px rgba(0,0,0,0.12);

    /* Font */
    --td-font-family: PingFang SC, Microsoft YaHei, Helvetica Neue, Helvetica, Arial, sans-serif;
    --td-font-size: 14px;
    --td-font-size-sm: 12px;
    --td-font-size-lg: 16px;
    --td-font-size-xl: 18px;
    --td-font-size-xxl: 24px;

    /* Spacing */
    --td-spacing-1: 4px;
    --td-spacing-2: 8px;
    --td-spacing-3: 12px;
    --td-spacing-4: 16px;
    --td-spacing-5: 20px;
    --td-spacing-6: 24px;
    --td-spacing-8: 32px;
    --td-spacing-10: 40px;
    --td-spacing-12: 48px;

    /* Transition */
    --td-transition: 0.2s cubic-bezier(0.38, 0, 0.24, 1);
}

/* --- Reset --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--td-font-family);
    font-size: var(--td-font-size);
    line-height: 1.6;
    color: var(--td-text-color-primary);
    background: var(--td-bg-color-page);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--td-brand-color);
    text-decoration: none;
    transition: color var(--td-transition);
}

a:hover {
    color: var(--td-brand-color-hover);
}

/* --- Layout --- */
.t-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--td-spacing-4);
}

@media (min-width: 768px) {
    .t-container { padding: 0 var(--td-spacing-6); }
}

/* ============================================
   Button 组件
   ============================================ */
.t-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 4px 16px;
    height: 32px;
    font-size: var(--td-font-size);
    font-family: inherit;
    font-weight: 400;
    line-height: 1;
    border: 1px solid var(--td-component-border);
    border-radius: var(--td-radius-default);
    background: var(--td-bg-color-container);
    color: var(--td-text-color-primary);
    cursor: pointer;
    transition: all var(--td-transition);
    white-space: nowrap;
    text-decoration: none;
}

.t-button:hover {
    border-color: var(--td-brand-color);
    color: var(--td-brand-color);
}

.t-button--primary {
    background: var(--td-brand-color);
    border-color: var(--td-brand-color);
    color: var(--td-text-color-on-brand);
}

.t-button--primary:hover {
    background: var(--td-brand-color-hover);
    border-color: var(--td-brand-color-hover);
    color: #fff;
}

.t-button--danger {
    background: var(--td-error-color);
    border-color: var(--td-error-color);
    color: #fff;
}

.t-button--danger:hover {
    opacity: 0.9;
    color: #fff;
}

.t-button--ghost {
    background: transparent;
    border-color: var(--td-component-border);
    color: var(--td-text-color-primary);
}

.t-button--text {
    background: transparent;
    border: none;
    color: var(--td-brand-color);
    padding: 4px 8px;
}

.t-button--text:hover {
    background: var(--td-brand-color-light);
    color: var(--td-brand-color);
}

.t-button--sm {
    height: 28px;
    padding: 2px 12px;
    font-size: var(--td-font-size-sm);
}

.t-button--lg {
    height: 40px;
    padding: 8px 24px;
    font-size: var(--td-font-size-lg);
}

.t-button--block {
    width: 100%;
}

/* ============================================
   Card 组件
   ============================================ */
.t-card {
    background: var(--td-bg-color-container);
    border: 1px solid var(--td-border-level-2);
    border-radius: var(--td-radius-medium);
    overflow: hidden;
    transition: box-shadow var(--td-transition);
}

.t-card--hoverable:hover {
    box-shadow: var(--td-shadow-2);
}

.t-card__header {
    padding: var(--td-spacing-4) var(--td-spacing-5);
    border-bottom: 1px solid var(--td-border-level-1);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.t-card__title {
    font-size: var(--td-font-size-lg);
    font-weight: 600;
    color: var(--td-text-color-primary);
}

.t-card__body {
    padding: var(--td-spacing-5);
}

.t-card__footer {
    padding: var(--td-spacing-4) var(--td-spacing-5);
    border-top: 1px solid var(--td-border-level-1);
}

/* ============================================
   Tag 组件
   ============================================ */
.t-tag {
    display: inline-flex;
    align-items: center;
    padding: 0 8px;
    height: 24px;
    font-size: var(--td-font-size-sm);
    font-weight: 400;
    line-height: 1;
    border-radius: var(--td-radius-default);
    background: var(--td-bg-color-secondary);
    color: var(--td-text-color-primary);
    white-space: nowrap;
}

.t-tag--blue { background: var(--td-brand-color-light); color: var(--td-brand-color); }
.t-tag--red { background: var(--td-error-color-light); color: var(--td-error-color); }
.t-tag--green { background: var(--td-success-color-light); color: var(--td-success-color); }
.t-tag--cyan { background: #e6f7ff; color: #08979c; }
.t-tag--orange { background: var(--td-warning-color-light); color: var(--td-warning-color); }
.t-tag--purple { background: #f3e8ff; color: #7c3aed; }
.t-tag--gray { background: #f0f0f0; color: #595959; }

.t-tag--lg {
    height: 28px;
    padding: 0 12px;
    font-size: var(--td-font-size);
}

.t-tag--clickable {
    cursor: pointer;
    transition: all var(--td-transition);
    text-decoration: none;
}

.t-tag--clickable:hover {
    opacity: 0.85;
}

/* ============================================
   Form 组件
   ============================================ */
.t-form { width: 100%; }

.t-form-item {
    margin-bottom: var(--td-spacing-5);
}

.t-form__label {
    display: block;
    margin-bottom: var(--td-spacing-2);
    font-size: var(--td-font-size);
    font-weight: 500;
    color: var(--td-text-color-primary);
}

.t-form__label .required {
    color: var(--td-error-color);
    margin-left: 2px;
}

.t-input,
.t-textarea,
.t-select {
    width: 100%;
    height: 32px;
    padding: 4px 12px;
    font-size: var(--td-font-size);
    font-family: inherit;
    color: var(--td-text-color-primary);
    background: var(--td-bg-color-container);
    border: 1px solid var(--td-component-border);
    border-radius: var(--td-radius-default);
    transition: border-color var(--td-transition);
    outline: none;
}

.t-textarea {
    height: auto;
    min-height: 100px;
    padding: 8px 12px;
    resize: vertical;
    line-height: 1.6;
}

.t-input:focus,
.t-textarea:focus,
.t-select:focus {
    border-color: var(--td-brand-color);
    box-shadow: 0 0 0 2px var(--td-brand-color-focus);
}

.t-input::placeholder,
.t-textarea::placeholder {
    color: var(--td-text-color-placeholder);
}

.t-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='12' viewBox='0 0 12 12' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M3 4.5L6 7.5L9 4.5' stroke='%238c8c8c' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 32px;
    cursor: pointer;
}

/* Form Row */
.t-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--td-spacing-4);
}

/* ============================================
   Table 组件
   ============================================ */
.t-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--td-font-size);
    background: var(--td-bg-color-container);
}

.t-table th {
    padding: 10px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--td-text-color-secondary);
    background: var(--td-bg-color-secondary);
    border-bottom: 1px solid var(--td-border-level-2);
    white-space: nowrap;
    font-size: var(--td-font-size-sm);
}

.t-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--td-border-level-1);
    color: var(--td-text-color-primary);
    vertical-align: middle;
}

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

.t-table tbody tr:last-child td {
    border-bottom: none;
}

/* ============================================
   Pagination
   ============================================ */
.t-pagination {
    display: flex;
    gap: var(--td-spacing-1);
    justify-content: center;
    margin-top: var(--td-spacing-6);
    align-items: center;
    flex-wrap: wrap;
}

.t-pagination a,
.t-pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 8px;
    font-size: var(--td-font-size-sm);
    border: 1px solid var(--td-component-border);
    border-radius: var(--td-radius-default);
    color: var(--td-text-color-primary);
    text-decoration: none;
    background: var(--td-bg-color-container);
    transition: all var(--td-transition);
}

.t-pagination a:hover {
    border-color: var(--td-brand-color);
    color: var(--td-brand-color);
}

.t-pagination .active {
    background: var(--td-brand-color);
    border-color: var(--td-brand-color);
    color: #fff;
}

/* ============================================
   Alert / Message
   ============================================ */
.t-alert {
    padding: 8px 16px;
    border-radius: var(--td-radius-default);
    margin-bottom: var(--td-spacing-4);
    font-size: var(--td-font-size-sm);
    display: flex;
    align-items: center;
    gap: 8px;
}

.t-alert--error {
    background: var(--td-error-color-light);
    color: var(--td-error-color);
}

.t-alert--success {
    background: var(--td-success-color-light);
    color: var(--td-success-color);
}

.t-alert--warning {
    background: var(--td-warning-color-light);
    color: var(--td-warning-color);
}

/* ============================================
   Dialog / Modal
   ============================================ */
.t-dialog__mask {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.t-dialog {
    background: var(--td-bg-color-container);
    border-radius: var(--td-radius-medium);
    box-shadow: var(--td-shadow-3);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.t-dialog__header {
    padding: var(--td-spacing-5) var(--td-spacing-5) var(--td-spacing-4);
    font-size: var(--td-font-size-lg);
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.t-dialog__body {
    padding: 0 var(--td-spacing-5) var(--td-spacing-5);
    overflow-y: auto;
    flex: 1;
}

.t-dialog__footer {
    padding: var(--td-spacing-4) var(--td-spacing-5);
    border-top: 1px solid var(--td-border-level-1);
    display: flex;
    justify-content: flex-end;
    gap: var(--td-spacing-2);
}

.t-dialog__close {
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: var(--td-text-color-placeholder);
    line-height: 1;
}

.t-dialog__close:hover {
    color: var(--td-text-color-primary);
}

/* ============================================
   Empty State
   ============================================ */
.t-empty {
    text-align: center;
    padding: 48px 16px;
    color: var(--td-text-color-placeholder);
}

.t-empty__icon {
    font-size: 48px;
    margin-bottom: var(--td-spacing-3);
    opacity: 0.4;
}

/* ============================================
   Space / Flex Utilities
   ============================================ */
.t-space {
    display: flex;
    gap: var(--td-spacing-3);
    flex-wrap: wrap;
}

.t-space--center { align-items: center; }
.t-space--between { justify-content: space-between; }
.t-space--end { justify-content: flex-end; }

/* ============================================
   Breadcrumb
   ============================================ */
.t-breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--td-spacing-2);
    font-size: var(--td-font-size-sm);
    color: var(--td-text-color-secondary);
    margin-bottom: var(--td-spacing-4);
}

.t-breadcrumb a {
    color: var(--td-text-color-secondary);
}

.t-breadcrumb a:hover {
    color: var(--td-brand-color);
}

.t-breadcrumb__separator {
    color: var(--td-text-color-placeholder);
}

/* ============================================
   Statistic / 数据统计
   ============================================ */
.t-stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.t-stat__value {
    font-size: 28px;
    font-weight: 700;
    color: var(--td-text-color-primary);
    line-height: 1.2;
}

.t-stat__label {
    font-size: var(--td-font-size-sm);
    color: var(--td-text-color-secondary);
}

/* ============================================
   Avatar
   ============================================ */
.t-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--td-brand-color-light);
    color: var(--td-brand-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 600;
    overflow: hidden;
    flex-shrink: 0;
}

.t-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.t-avatar--sm {
    width: 32px;
    height: 32px;
    font-size: 13px;
}

/* ============================================
   Divider
   ============================================ */
.t-divider {
    height: 1px;
    background: var(--td-border-level-1);
    margin: var(--td-spacing-5) 0;
    border: none;
}

/* ============================================
   Grid
   ============================================ */
.t-grid {
    display: grid;
    gap: var(--td-spacing-4);
}

.t-grid--2 { grid-template-columns: repeat(2, 1fr); }
.t-grid--3 { grid-template-columns: repeat(3, 1fr); }
.t-grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 768px) {
    .t-grid--2, .t-grid--3, .t-grid--4 {
        grid-template-columns: 1fr;
    }
    .t-form-row {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Responsive Helpers
   ============================================ */
@media (max-width: 768px) {
    .hide-mobile { display: none !important; }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-thumb {
    background: #d0d0d0;
    border-radius: 3px;
}

::-webkit-scrollbar-track {
    background: transparent;
}