/* =====================================================
   WordMate Design System
   基于 Tabler，补充自定义组件样式
   ===================================================== */

:root {
    --wm-primary: #206bc4;
    --wm-primary-dark: #1a5aa8;
    --wm-radius: 1rem;
    --wm-radius-sm: 0.5rem;
    --wm-card-shadow: 0 1px 3px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.05);
    --wm-card-shadow-hover: 0 10px 25px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.04);
    --wm-transition: all 0.2s ease;
    --wm-max-width: 860px;
    --wm-list-max-width: 1200px;
}

/* 内容最大宽度限制 */
.wm-container {
    max-width: var(--wm-max-width);
    margin: 0 auto;
}
.wm-container-wide {
    max-width: var(--wm-list-max-width);
    margin: 0 auto;
}

/* 顶部导航 */
.wm-navbar {
    backdrop-filter: blur(10px);
    background: rgba(var(--tblr-body-bg-rgb), 0.85);
    border-bottom: 1px solid var(--tblr-border-color-translucent);
    position: sticky;
    top: 0;
    z-index: 1030;
}
.wm-navbar .navbar-brand {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}
.wm-navbar .nav-link {
    font-weight: 500;
    color: var(--tblr-secondary);
    border-radius: var(--wm-radius-sm);
    padding: 0.5rem 0.875rem;
    transition: var(--wm-transition);
}
.wm-navbar .nav-link:hover,
.wm-navbar .nav-link.active {
    color: var(--wm-primary);
    background: rgba(32, 107, 196, 0.08);
}
.wm-navbar .dropdown-toggle::after {
    vertical-align: 0.15em;
}
@media (max-width: 575.98px) {
    .wm-navbar .nav-link {
        padding: 0.5rem;
    }
    .wm-navbar .nav-link .nav-text {
        display: none;
    }
    .wm-navbar .dropdown-toggle::after {
        display: none;
    }
    .wm-navbar .navbar-brand {
        font-size: 1.1rem;
    }
    .wm-navbar .navbar-brand span:last-child {
        display: none;
    }
}
.wm-nav-dropdown {
    min-width: 220px;
    border-radius: var(--wm-radius-sm);
    box-shadow: var(--wm-card-shadow-hover);
    border: 1px solid var(--tblr-border-color-translucent);
    padding: 0.5rem 0;
}
.wm-nav-dropdown .dropdown-header {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--tblr-secondary);
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
}
.wm-nav-dropdown .dropdown-item {
    padding: 0.5rem 1rem 0.5rem 1.75rem;
    font-size: 0.9375rem;
    color: var(--tblr-body-color);
    border-radius: 0;
}
.wm-nav-dropdown .dropdown-item:hover,
.wm-nav-dropdown .dropdown-item:focus {
    color: var(--wm-primary);
    background: rgba(32, 107, 196, 0.06);
}
.wm-nav-dropdown .dropdown-divider {
    margin: 0.5rem 0;
}
@media (max-width: 575.98px) {
    .wm-nav-dropdown {
        min-width: 180px;
        max-width: calc(100vw - 2rem);
    }
}

/* 搜索框 */
.wm-search-wrapper {
    position: relative;
    z-index: 100;
}
.wm-search {
    position: relative;
}
.wm-search .wm-search-icon {
    position: absolute;
    left: 1.125rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--tblr-secondary);
    font-size: 1.25rem;
    pointer-events: none;
    z-index: 5;
}
.wm-search input {
    padding-left: 3rem;
    padding-right: 3rem;
    border-radius: var(--wm-radius);
    border: 2px solid var(--tblr-border-color);
    font-size: 1.125rem;
    height: 3.5rem;
    transition: var(--wm-transition);
    background: var(--tblr-card-bg);
}
.wm-search input:focus {
    border-color: var(--wm-primary);
    box-shadow: 0 0 0 4px rgba(32, 107, 196, 0.12);
}
.wm-search .wm-search-clear {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--tblr-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--wm-transition);
}
.wm-search .wm-search-clear:hover {
    color: var(--tblr-body-color);
    background: var(--tblr-border-color-translucent);
}
.wm-search-hints {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}
.wm-search-hints .hint-chip {
    font-size: 0.8125rem;
    color: var(--tblr-secondary);
    background: var(--tblr-bg-surface-secondary);
    padding: 0.25rem 0.625rem;
    border-radius: 999px;
    cursor: pointer;
    transition: var(--wm-transition);
}
.wm-search-hints .hint-chip:hover {
    color: var(--wm-primary);
    background: rgba(32, 107, 196, 0.1);
}

/* 搜索历史 */
.wm-history-bar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.875rem;
    padding-top: 0.875rem;
    border-top: 1px solid var(--tblr-border-color-translucent);
}
.wm-history-bar .history-chip {
    font-size: 0.8125rem;
    color: var(--tblr-secondary);
    background: var(--tblr-bg-surface-secondary);
    padding: 0.25rem 0.625rem;
    border-radius: 999px;
    cursor: pointer;
    transition: var(--wm-transition);
    max-width: 160px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.wm-history-bar .history-chip:hover {
    color: var(--wm-primary);
    background: rgba(32, 107, 196, 0.1);
}

/* 自动补全 */
.wm-suggestions {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    z-index: 1050;
    border-radius: var(--wm-radius-sm);
    box-shadow: var(--wm-card-shadow-hover);
    border: 1px solid var(--tblr-border-color-translucent);
    background: var(--tblr-card-bg);
    overflow: hidden;
    display: block;
    max-height: 320px;
    overflow-y: auto;
}
.wm-suggestions .suggest-item {
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: var(--wm-transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.wm-suggestions .suggest-item:hover,
.wm-suggestions .suggest-item.active {
    background: rgba(32, 107, 196, 0.08);
}
.wm-suggestions .suggest-item .match {
    color: var(--wm-primary);
    font-weight: 600;
}

/* 通用卡片 */
.wm-card {
    background: var(--tblr-card-bg);
    border: 1px solid var(--tblr-border-color-translucent);
    border-radius: var(--wm-radius);
    box-shadow: var(--wm-card-shadow);
    transition: var(--wm-transition);
}
.wm-card:hover {
    box-shadow: var(--wm-card-shadow-hover);
}

/* 单词详情卡片 */
.wm-word-header {
    padding: 1.75rem 2rem;
    border-bottom: 1px solid var(--tblr-border-color-translucent);
}
.wm-word-title {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--tblr-body-color);
}
.wm-phonetic {
    font-size: 1.25rem;
    color: var(--tblr-secondary);
    font-family: Georgia, "Times New Roman", serif;
    margin-top: 0.375rem;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.wm-speak-btn {
    padding: 0;
    margin: 0;
    border: none;
    background: transparent;
    color: var(--wm-primary);
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    border-radius: 50%;
    transition: var(--wm-transition);
}
.wm-speak-btn:hover {
    background: rgba(32, 107, 196, 0.1);
    color: var(--wm-primary-dark);
    transform: scale(1.1);
}
.wm-word-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}
.wm-word-actions .btn-icon {
    width: 2.5rem;
    height: 2.5rem;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}
.wm-word-actions .fav-icon {
    color: var(--tblr-secondary);
    transition: var(--wm-transition);
}
.wm-word-actions .fav-icon.filled {
    color: #e03131;
}
.wm-word-actions .btn.active .fav-icon {
    color: #e03131;
}

/* 标签组 */
.wm-tag-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
}
.wm-tag {
    font-size: 0.8125rem;
    font-weight: 600;
    padding: 0.35em 0.8em;
    border-radius: 999px;
    text-decoration: none;
    transition: var(--wm-transition);
}
.wm-tag:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}
.wm-tag.exam {
    background: rgba(32, 107, 196, 0.1);
    color: var(--wm-primary);
}
.wm-tag.k12 {
    background: rgba(47, 179, 126, 0.12);
    color: #2fb37e;
}
.wm-tag.collins {
    background: rgba(245, 166, 35, 0.12);
    color: #c78207;
}
.wm-tag.oxford {
    background: rgba(32, 107, 196, 0.1);
    color: var(--wm-primary);
}

/* 释义区域 */
.wm-section {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--tblr-border-color-translucent);
}
.wm-section:last-child {
    border-bottom: none;
}
.wm-section-title {
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--tblr-secondary);
    margin-bottom: 0.875rem;
}
.wm-definition-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.wm-definition-list li {
    padding: 0.5rem 0;
    font-size: 1.05rem;
    line-height: 1.7;
    border-bottom: 1px solid var(--tblr-border-color-translucent);
}
.wm-definition-list li:last-child {
    border-bottom: none;
}
.wm-definition-list .pos {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--wm-primary);
    background: rgba(32, 107, 196, 0.08);
    padding: 0.15rem 0.5rem;
    border-radius: 0.25rem;
    margin-right: 0.5rem;
    text-transform: uppercase;
}

/* 例句 */
.wm-examples {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.wm-example-item {
    padding: 1rem 1.25rem;
    background: var(--tblr-bg-surface-secondary);
    border-radius: var(--wm-radius-sm);
    border-left: 3px solid var(--wm-primary);
}
.wm-example-item.compact {
    padding: 0.75rem 1rem;
}
.wm-example-item .en {
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--tblr-body-color);
    margin-bottom: 0.25rem;
}
.wm-example-item .zh {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--tblr-secondary);
}

/* 词形变化网格 */
.wm-exchange-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 0.75rem;
}
.wm-exchange-item {
    background: var(--tblr-bg-surface-secondary);
    border-radius: var(--wm-radius-sm);
    padding: 0.75rem 1rem;
    transition: var(--wm-transition);
}
.wm-exchange-item:hover {
    background: var(--tblr-border-color-translucent);
}
.wm-exchange-item .label {
    font-size: 0.75rem;
    color: var(--tblr-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}
.wm-exchange-item .form {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--wm-primary);
}

/* 元信息条 */
.wm-meta-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    padding: 1rem 2rem;
    background: var(--tblr-bg-surface-secondary);
    border-top: 1px solid var(--tblr-border-color-translucent);
    font-size: 0.875rem;
    color: var(--tblr-secondary);
}
.wm-meta-bar strong {
    color: var(--tblr-body-color);
}

/* 每日单词卡片 */
.wm-daily-card {
    overflow: hidden;
}
.wm-daily-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 1.25rem;
    background: rgba(32, 107, 196, 0.06);
    border-bottom: 1px solid var(--tblr-border-color-translucent);
    font-weight: 600;
    color: var(--tblr-body-color);
}
.wm-daily-body {
    padding: 1.5rem 1.75rem;
}
.wm-daily-word {
    font-size: 2rem;
    font-weight: 800;
    color: var(--tblr-body-color);
    text-decoration: none;
    letter-spacing: -0.02em;
}
.wm-daily-word:hover {
    color: var(--wm-primary);
}
.wm-daily-phonetic {
    font-size: 1.1rem;
    color: var(--tblr-secondary);
    font-family: Georgia, "Times New Roman", serif;
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.375rem;
}
.wm-daily-examples .wm-section-title {
    margin-bottom: 0.5rem;
}

/* 二级导航菜单 */
.wm-nav-menu {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.wm-nav-group {
    border: 1px solid var(--tblr-border-color-translucent);
    border-radius: var(--wm-radius-sm);
    overflow: hidden;
}
.wm-nav-group-title {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.875rem 1rem;
    background: var(--tblr-bg-surface-secondary);
    border: none;
    font-weight: 600;
    color: var(--tblr-body-color);
    cursor: pointer;
    transition: var(--wm-transition);
}
.wm-nav-group-title:hover {
    background: var(--tblr-border-color-translucent);
}
.wm-nav-group-title .chevron {
    margin-left: auto;
    transition: transform 0.2s ease;
    color: var(--tblr-secondary);
}
.wm-nav-group-title .chevron.open {
    transform: rotate(180deg);
}
.wm-nav-items {
    display: none;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 0.5rem;
    padding: 0.75rem;
    background: var(--tblr-card-bg);
}
.wm-nav-items.open {
    display: grid;
}
.wm-nav-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 0.5rem;
    border-radius: var(--wm-radius-sm);
    background: var(--tblr-bg-surface-secondary);
    color: var(--tblr-body-color);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 500;
    transition: var(--wm-transition);
}
.wm-nav-item:hover {
    background: rgba(32, 107, 196, 0.1);
    color: var(--wm-primary);
}

/* 统计卡片 */
.wm-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
}
.wm-stat-card {
    background: var(--tblr-card-bg);
    border: 1px solid var(--tblr-border-color-translucent);
    border-radius: var(--wm-radius);
    padding: 1.25rem;
    box-shadow: var(--wm-card-shadow);
    transition: var(--wm-transition);
}
.wm-stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--wm-card-shadow-hover);
}
.wm-stat-card .label {
    font-size: 0.8125rem;
    color: var(--tblr-secondary);
    font-weight: 500;
}
.wm-stat-card .value {
    font-size: 1.75rem;
    font-weight: 800;
    margin-top: 0.25rem;
    color: var(--tblr-body-color);
}

/* 词表页 */
.wm-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}
.wm-table th {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--tblr-secondary);
    padding: 1rem 1.25rem;
    border-bottom: 2px solid var(--tblr-border-color-translucent);
    background: var(--tblr-bg-surface-secondary);
}
.wm-table td {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--tblr-border-color-translucent);
    vertical-align: top;
}
.wm-table tbody tr {
    transition: var(--wm-transition);
}
.wm-table tbody tr:hover {
    background: rgba(32, 107, 196, 0.03);
}
.wm-table .word-link {
    font-weight: 700;
    color: var(--tblr-body-color);
    text-decoration: none;
    font-size: 1.05rem;
}
.wm-table .word-link:hover {
    color: var(--wm-primary);
}

/* 移动端通用调整 */
@media (max-width: 767.98px) {
    .wm-word-header {
        padding: 1.25rem 1.25rem;
    }
    .wm-word-title {
        font-size: 1.875rem;
    }
    .wm-phonetic {
        font-size: 1.1rem;
    }
    .wm-section {
        padding: 1.25rem 1.25rem;
    }
    .wm-meta-bar {
        padding: 1rem 1.25rem;
        gap: 1rem;
    }
    .wm-exchange-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
    .wm-daily-body {
        padding: 1.25rem;
    }
    .wm-daily-word {
        font-size: 1.75rem;
    }
    .wm-daily-header {
        padding: 0.75rem 1rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    .wm-search input {
        font-size: 1rem;
        height: 3rem;
        padding-left: 2.75rem;
        padding-right: 2.5rem;
    }
    .wm-search .wm-search-icon {
        left: 0.875rem;
    }
}

/* 移动端词表卡片 */
.wm-word-cards,
.wm-fav-cards {
    display: none;
}
@media (max-width: 767.98px) {
    .wm-table-wrapper,
    .wm-fav-table {
        display: none;
    }
    .wm-word-cards,
    .wm-fav-cards {
        display: grid;
        gap: 0.75rem;
    }
    .wm-word-card,
    .wm-fav-card {
        background: var(--tblr-card-bg);
        border: 1px solid var(--tblr-border-color-translucent);
        border-radius: var(--wm-radius-sm);
        padding: 1rem;
    }
    .wm-word-card .title,
    .wm-fav-card .title {
        font-weight: 700;
        font-size: 1.1rem;
        color: var(--tblr-body-color);
        text-decoration: none;
    }
    .wm-word-card .title:hover,
    .wm-fav-card .title:hover {
        color: var(--wm-primary);
    }
    .wm-word-card .phonetic,
    .wm-fav-card .phonetic {
        font-size: 0.95rem;
    }
    .wm-word-card .trans,
    .wm-fav-card .trans {
        font-size: 0.9375rem;
        color: var(--tblr-secondary);
        margin-top: 0.5rem;
        line-height: 1.5;
    }
    .wm-fav-card .date {
        margin-top: 0.5rem;
    }
    .wm-nav-items {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 分页 */
.wm-pagination .page-link {
    cursor: pointer;
    border-radius: var(--wm-radius-sm);
    margin: 0 0.125rem;
    min-width: 2.5rem;
    text-align: center;
    color: var(--tblr-secondary);
    border: 1px solid var(--tblr-border-color-translucent);
    background: var(--tblr-card-bg);
}
.wm-pagination .page-item.active .page-link {
    background: var(--wm-primary);
    border-color: var(--wm-primary);
    color: #fff;
}
.wm-pagination .page-item.disabled .page-link {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 空状态 */
.wm-empty {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--tblr-secondary);
}
.wm-empty .icon {
    font-size: 4rem;
    opacity: 0.4;
    margin-bottom: 1rem;
}
.wm-empty .title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--tblr-body-color);
    margin-bottom: 0.5rem;
}

/* 骨架屏 */
.wm-skeleton {
    background: linear-gradient(90deg, var(--tblr-bg-surface-secondary) 25%, var(--tblr-border-color-translucent) 50%, var(--tblr-bg-surface-secondary) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--wm-radius-sm);
}
@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* 页脚 */
.wm-footer {
    margin-top: 3rem;
    padding: 2rem 0;
    border-top: 1px solid var(--tblr-border-color-translucent);
    text-align: center;
    color: var(--tblr-secondary);
    font-size: 0.875rem;
}

/* 顶部主题切换按钮 */
.wm-theme-btn {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    border: 1px solid var(--tblr-border-color-translucent);
    background: var(--tblr-card-bg);
    color: var(--tblr-secondary);
    font-size: 1.15rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: var(--wm-transition);
}
.wm-theme-btn:hover {
    color: var(--wm-primary);
    border-color: var(--wm-primary);
    background: rgba(32, 107, 196, 0.06);
}

/* 暗色模式微调 */
[data-bs-theme="dark"] .wm-search input:focus {
    box-shadow: 0 0 0 4px rgba(96, 165, 250, 0.15);
}
[data-bs-theme="dark"] .wm-tag.exam {
    background: rgba(96, 165, 250, 0.15);
    color: #60a5fa;
}
[data-bs-theme="dark"] .wm-tag.k12 {
    background: rgba(74, 222, 128, 0.15);
    color: #4ade80;
}
[data-bs-theme="dark"] .wm-tag.collins {
    background: rgba(251, 191, 36, 0.15);
    color: #fbbf24;
}
[data-bs-theme="dark"] .wm-example-item {
    background: rgba(255,255,255,0.03);
}
[data-bs-theme="dark"] .wm-daily-header {
    background: rgba(96, 165, 250, 0.1);
}

/* 图标 */
.wm-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    vertical-align: middle;
    line-height: 1;
}
.wm-icon svg {
    width: 1em;
    height: 1em;
    flex-shrink: 0;
}

/* 工具类 */
.text-primary-gradient {
    background: linear-gradient(135deg, var(--wm-primary) 0%, #4aa3f5 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}