/* ============================================================
   懂工具 - 组件样式 components.css
   说明：导航、按钮、卡片、表单、徽章等通用组件
   ============================================================ */

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--color-border-soft);
}

.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 19px;
  color: var(--color-ink);
  white-space: nowrap;
}

.brand__logo {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.brand__name strong {
  color: var(--color-primary);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
}

.main-nav a {
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--color-ink-soft);
  transition: all 0.18s ease;
}

.main-nav a:hover {
  color: var(--color-ink);
  background: var(--color-primary-soft);
}

.header-search {
  flex: 1;
  max-width: 360px;
  margin-left: auto;
  position: relative;
}

.header-search input {
  width: 100%;
  height: 38px;
  padding: 0 14px 0 38px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-card);
  transition: border-color 0.18s, box-shadow 0.18s;
}

.header-search input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.12);
  outline: none;
}

.header-search__icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--color-ink-mute);
  pointer-events: none;
}

.search-results {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-height: 360px;
  overflow-y: auto;
  display: none;
}

.search-results.is-open {
  display: block;
}

.search-results a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  font-size: 14px;
  border-bottom: 1px solid var(--color-border-soft);
  transition: background 0.15s;
}

.search-results a:last-child {
  border-bottom: none;
}

.search-results a:hover {
  background: var(--color-primary-soft);
}

.search-results__cat {
  margin-left: auto;
  font-size: 12px;
  color: var(--color-ink-mute);
}

/* 移动端汉堡按钮 */
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-ink);
}

.menu-toggle svg {
  width: 22px;
  height: 22px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 42px;
  padding: 0 22px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  transition: all 0.18s ease;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-primary);
}

.btn--primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}

.btn--primary:active {
  transform: translateY(0);
}

.btn--ghost {
  background: var(--color-card);
  color: var(--color-ink);
  border: 1px solid var(--color-border);
}

.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--lg {
  height: 52px;
  padding: 0 32px;
  font-size: 16px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ---------- 分类徽章 ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 22px;
  padding: 0 10px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.badge--image { background: #E0F2FE; color: var(--cat-image); }
.badge--document { background: #ECFDF5; color: var(--cat-document); }
.badge--audio { background: #F7FEE7; color: var(--cat-audio); }
.badge--video { background: #FEF9C3; color: var(--cat-video); }
.badge--utility { background: #FEF6E7; color: var(--cat-utility); }
.badge--pdf { background: #FEE2E2; color: var(--cat-pdf); }
.badge--text { background: #FCE7F3; color: var(--cat-text); }

/* ---------- 分类胶囊筛选 ---------- */
.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-tab {
  height: 38px;
  padding: 0 18px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink-soft);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  transition: all 0.18s ease;
}

.filter-tab:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.filter-tab.is-active {
  background: var(--color-ink);
  color: #fff;
  border-color: var(--color-ink);
}

.filter-tab__count {
  margin-left: 6px;
  font-size: 12px;
  opacity: 0.7;
}

/* ---------- 工具卡片 ---------- */
.tool-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 20px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  height: 100%;
}

.tool-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--card-accent, var(--color-primary));
  opacity: 0;
  transition: opacity 0.22s;
}

.tool-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border);
  box-shadow: var(--shadow-lg);
}

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

.tool-card__icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--card-accent-soft, var(--color-primary-soft));
  color: var(--card-accent, var(--color-primary));
  margin-bottom: 14px;
}

.tool-card__icon svg {
  width: 22px;
  height: 22px;
}

.tool-card__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.tool-card__desc {
  font-size: 13px;
  color: var(--color-ink-mute);
  line-height: 1.5;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tool-card__foot {
  margin-top: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-ink-mute);
  flex-wrap: wrap;
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb__sep {
  color: var(--color-ink-mute);
  opacity: 0.5;
}

/* ---------- 表单控件 ---------- */
.field {
  margin-bottom: 16px;
}

.field__label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-ink-soft);
  margin-bottom: 8px;
}

.input,
.select,
.textarea {
  width: 100%;
  height: 42px;
  padding: 0 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-card);
  transition: border-color 0.18s, box-shadow 0.18s;
}

.textarea {
  height: auto;
  padding: 12px 14px;
  resize: vertical;
  min-height: 120px;
  font-family: var(--font-mono);
  font-size: 13px;
}

.input:focus,
.select:focus,
.textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.12);
  outline: none;
}

/* 复选/单选 */
.check {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 14px;
}

.check input {
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary);
}

/* ---------- 进度条 ---------- */
.progress {
  height: 8px;
  background: var(--color-border-soft);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress__bar {
  height: 100%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  width: 0;
  transition: width 0.3s ease;
}

/* ---------- 提示框 ---------- */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 13px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.alert--info {
  background: #E0F2FE;
  color: #0369A1;
}

.alert--success {
  background: #ECFDF5;
  color: #065F46;
}

.alert--error {
  background: #FEF2F2;
  color: #991B1B;
}

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: 80px;
  padding: 40px 0 32px;
  background: var(--color-ink);
  color: rgba(255, 255, 255, 0.7);
}

.site-footer a {
  color: rgba(255, 255, 255, 0.7);
}

.site-footer a:hover {
  color: #fff;
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 24px;
}

.site-footer__brand {
  max-width: 320px;
}

.site-footer__brand p {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
}

.site-footer__cols {
  display: flex;
  gap: 64px;
  flex-wrap: wrap;
}

.footer-col h4 {
  color: #fff;
  font-size: 14px;
  margin-bottom: 12px;
}

.footer-col li {
  margin-bottom: 8px;
  font-size: 13px;
}

.site-footer__bottom {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 12px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .menu-toggle {
    display: inline-flex;
  }
  .main-nav,
  .header-search {
    display: none;
  }
  .main-nav.is-open,
  .header-search.is-open {
    display: block;
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-card);
    padding: 16px;
    z-index: 99;
    overflow-y: auto;
  }
  .main-nav.is-open {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  .main-nav.is-open a {
    padding: 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
  }
  .header-search.is-open {
    max-width: none;
    padding-top: 16px;
  }
  .header-search.is-open .search-results {
    position: static;
    box-shadow: none;
    border: none;
    margin-top: 8px;
  }
}