/* ================================
 * search.css — 语义搜索页面样式
 * 版本: v5
 * ================================ */

/* ================================
 * 搜索框区域
 * ================================ */
.search-container {
    max-width: 720px;
    margin: 0 auto;
    padding: 32px 16px 24px;
}

.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.search-input-wrapper:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-bg);
}

.search-icon {
    width: 20px;
    height: 20px;
    margin-left: 16px;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.search-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    padding: 14px 12px;
    font-size: 16px;
    color: var(--text);
    min-width: 0;
}

.search-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.search-clear {
    display: none;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    margin-right: 12px;
    border: none;
    background: var(--border);
    color: var(--text-secondary);
    border-radius: 50%;
    font-size: 16px;
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.15s, color 0.15s;
    line-height: 1;
    padding: 0;
}

.search-clear:hover {
    background: var(--text-secondary);
    color: var(--bg);
}

/* ================================
 * 搜索提示标签
 * ================================ */
.search-hints {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
    font-size: 13px;
    color: var(--text-secondary);
}

.hint-chip {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    background: var(--surface);
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.hint-chip:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-bg);
}

/* ================================
 * 搜索状态
 * ================================ */
.search-status {
    text-align: center;
    padding: 8px 16px;
    font-size: 13px;
    color: var(--text-secondary);
    min-height: 20px;
}

.search-status.status-searching {
    color: var(--primary);
}

.search-status.status-done {
    color: #16a34a;
}

.search-status.status-error {
    color: #dc2626;
}

/* ======== 筛选栏 ======== */
.search-filters {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 14px;
    font-size: 13px;
    color: var(--text-secondary);
}

.filter-row {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-row + .filter-row {
    margin-top: 22px;
}

.filter-label {
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.filter-chip {
    font-size: 13px;
    padding: 5px 14px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.filter-chip:hover {
    background: rgba(37,99,235,0.06);
    border-color: var(--primary);
}

.filter-chip.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* ================================
 * 搜索结果
 * ================================ */
.search-results {
    max-width: 720px;
    margin: 0 auto;
    padding: 12px 16px 40px;
}

.result-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.result-card {
    padding: 16px 20px;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
}

.result-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.result-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.result-type {
    font-size: 12px;
    padding: 2px 10px;
}

.result-difficulty {
    font-size: 12px;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

.diff-easy    { color: #16a34a; background: rgba(22,163,74,0.1);  }
.diff-medium  { color: #2563eb; background: rgba(37,99,235,0.1);  }
.diff-hard    { color: #f59e0b; background: rgba(245,158,11,0.1);  }
.diff-very-hard { color: #f97316; background: rgba(249,115,22,0.1); }
.diff-extreme { color: #dc2626; background: rgba(220,38,38,0.1);  }

.match-badge {
    font-size: 11px;
    padding: 2px 8px;
    background: rgba(37,99,235,0.1);
    color: var(--primary);
    border-radius: var(--radius-full);
}

/* ================================
 * 结果来源标签
 * ================================ */
.result-source {
    font-size: 12px;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.grammar-source {
    background: rgba(139,92,246,0.1);
    color: #7c3aed;
}

.quiz-source {
    background: rgba(37,99,235,0.1);
    color: #2563eb;
}

/* ================================
 * 难度等级标签
 * ================================ */
.result-level {
    font-size: 11px;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text-secondary);
}

/* ================================
 * 语法卡片特有样式
 * ================================ */
.result-title {
    font-size: 16px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text);
    margin-bottom: 8px;
}

.result-snippet {
    font-size: 13px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.result-detail {
    font-size: 12px;
    line-height: 1.5;
    color: var(--text-secondary);
    opacity: 0.8;
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.result-body {
    margin-bottom: 12px;
}

.result-question {
    font-size: 15px;
    line-height: 1.6;
    color: var(--text);
    margin-bottom: 8px;
}

.result-options {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.result-opt {
    font-size: 12px;
    padding: 2px 8px;
    background: var(--surface);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
}

.result-opt-answer {
    background: rgba(22,163,74,0.1);
    color: #16a34a;
    font-weight: 500;
}

.result-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

.result-link {
    font-size: 13px;
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.15s;
}

.result-link:hover {
    opacity: 0.8;
}

/* ================================
 * 高亮
 * ================================ */
.search-highlight {
    background: #fef08a;
    color: #854d0e;
    padding: 1px 2px;
    border-radius: 2px;
}

/* ================================
 * 空状态 & 初始状态
 * ================================ */
.search-empty,
.search-intro {
    text-align: center;
    padding: 48px 16px;
    color: var(--text-secondary);
}

.search-empty-icon,
.search-intro-icon {
    font-size: 40px;
    margin-bottom: 12px;
}

.search-empty p,
.search-intro p {
    margin: 0 0 6px;
    font-size: 15px;
}

.search-empty-hint,
.search-intro-hint {
    font-size: 13px;
    opacity: 0.7;
}

/* ================================
 * 底部汇总 & 分页
 * ================================ */
.search-summary {
    max-width: 720px;
    margin: 0 auto;
    padding: 8px 16px 4px;
    text-align: center;
    font-size: 14px;
    color: var(--text-secondary);
}

.search-summary strong {
    color: var(--primary);
    font-weight: 600;
}

/* 分页容器（使用 style.css 中已有的 .pagination 样式）*/

/* ================================
 * 响应式
 * ================================ */
@media (max-width: 480px) {
    .search-container {
        padding: 20px 12px 16px;
    }

    .search-input {
        font-size: 15px;
        padding: 12px 10px;
    }

    .search-hints {
        font-size: 12px;
    }

    .hint-chip {
        font-size: 12px;
        padding: 3px 10px;
    }

    .result-card {
        padding: 14px 16px;
    }

    .result-question {
        font-size: 14px;
    }
}