/* ============ HTML 归类导航站 全局样式 ============ */
:root {
  --bg: #f4f6fb;
  --card-bg: #ffffff;
  --border: #e6e9f0;
  --text: #1f2430;
  --text-2: #7a8194;
  --primary: #4f6ef7;
  --primary-dark: #3b56d9;
  --danger: #e5484d;
  --success: #30a46c;
  --shadow: 0 2px 10px rgba(31, 36, 48, 0.06);
  --shadow-lg: 0 10px 30px rgba(31, 36, 48, 0.12);
  --radius: 14px;
  --radius-sm: 9px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

/* 防止移动端上下拉动触发浏览器原生下拉刷新 / 回弹刷新 */
html, body {
  overscroll-behavior-y: none;
  -webkit-overflow-scrolling: touch;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ---------------- 顶部导航 ---------------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 12px 20px;
  display: grid;
  grid-template-columns: auto minmax(180px, 1fr) auto auto;
  align-items: center;
  gap: 12px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.logo-icon {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 17px;
  flex-shrink: 0;
}

/* 搜索框：占据中间弹性列，最大宽度 360px，靠左对齐 */
.search-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 14px;
  width: 100%;
  max-width: 360px;
  justify-self: start;
}
.search-wrap:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79, 110, 247, 0.12); }
.search-wrap svg { flex-shrink: 0; color: var(--text-2); }
.search-wrap input {
  border: none;
  outline: none;
  font-size: 14px;
  width: 100%;
  background: transparent;
  color: var(--text);
}

/* 顶部按钮：文字不换行 */
.copy-btn, .add-btn, .back-btn { white-space: nowrap; }

/* add 页返回按钮：占满剩余列并靠右 */
.back-btn { justify-self: end; grid-column: 2 / -1; }

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  transition: all 0.15s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); }

.btn-outline {
  background: #fff;
  border-color: var(--border);
  color: var(--text);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { filter: brightness(0.92); }

.btn-sm { padding: 5px 10px; font-size: 12.5px; border-radius: 7px; }

/* ---------------- 分类 tab ---------------- */
.cats-bar {
  max-width: 1280px;
  margin: 20px auto 0;
  padding: 0 24px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.cat-tab {
  padding: 7px 16px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-2);
  background: #fff;
  border: 1px solid var(--border);
  transition: all 0.15s ease;
}
.cat-tab:hover { color: var(--primary); border-color: var(--primary); }
.cat-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.cat-count {
  font-size: 11px;
  opacity: 0.7;
  margin-left: 3px;
}

/* ---------------- 卡片网格 ---------------- */
.cards-wrap {
  max-width: 1280px;
  margin: 24px auto 60px;
  padding: 0 24px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  position: relative;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* 置顶卡片：高亮边框 */
.card.pinned {
  border-color: rgba(79, 110, 247, 0.55);
  box-shadow: 0 0 0 1px rgba(79, 110, 247, 0.25), var(--shadow);
}
.card.pinned:hover {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px rgba(79, 110, 247, 0.4), var(--shadow-lg);
}

/* 置顶标识（卡片左上角） */
.pin-flag {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 4;
  background: rgba(79, 110, 247, 0.92);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 999px;
  box-shadow: 0 2px 8px rgba(79, 110, 247, 0.35);
  pointer-events: none;
}

/* 预览区：A4/书本比例（210:297），iframe 缩放缩略 */
.card-preview {
  position: relative;
  aspect-ratio: 210 / 297;   /* A4 竖版比例 */
  background: #fff;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}
.card-preview iframe {
  position: absolute;
  top: 0;
  left: 50%;
  width: 1200px;
  height: 1697px;   /* 1200 × 1.414 = A4 比例 */
  border: none;
  transform-origin: top center;
  pointer-events: none;
  background: #fff;
}
.preview-empty {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-2);
  font-size: 13px;
  gap: 6px;
}

/* 触摸隔离层：透明盖在 iframe 上方，拦截所有触摸/点击事件，
   防止触摸穿透进 iframe（移动端会触发 WebView 整页刷新）。
   自身透明不影响视觉；滚动与点击事件冒泡到父页面正常处理。 */
.card-preview .touch-guard {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: transparent;
  cursor: pointer;
}
.card-preview::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(31, 36, 48, 0.25));
  opacity: 0;
  transition: opacity 0.18s ease;
}
.card:hover .card-preview::after { opacity: 1; }

/* 预览区悬浮操作 */
.card-hover-actions {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 10px;
  display: flex;
  justify-content: center;
  gap: 8px;
  opacity: 0;
  transform: translateY(8px);
  transition: all 0.18s ease;
  z-index: 3;
}
.card:hover .card-hover-actions { opacity: 1; transform: translateY(0); }
.card-hover-actions .btn {
  background: rgba(31, 36, 48, 0.78);
  color: #fff;
  backdrop-filter: blur(6px);
}
.card-hover-actions .btn:hover { background: var(--primary); }

.card-body { padding: 13px 15px 15px; }

.card-title {
  font-size: 15px;
  font-weight: 650;
  margin-bottom: 7px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(79, 110, 247, 0.1);
  padding: 3px 10px;
  border-radius: 999px;
  max-width: 55%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-time {
  font-size: 12px;
  color: var(--text-2);
  flex-shrink: 0;
}

/* 删除按钮（右上角，hover 显示） */
.card-del {
  position: absolute;
  top: 8px;
  right: 8px;
  z-index: 4;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border);
  color: var(--text-2);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all 0.15s ease;
  box-shadow: var(--shadow);
}
.card:hover .card-del { opacity: 1; }
.card-del:hover { color: var(--danger); border-color: var(--danger); }

/* ---------------- 空状态 ---------------- */
.empty {
  text-align: center;
  padding: 90px 20px;
  color: var(--text-2);
}
.empty .empty-icon { font-size: 52px; margin-bottom: 16px; }
.empty h3 { font-size: 18px; color: var(--text); margin-bottom: 8px; }
.empty p { font-size: 14px; line-height: 1.7; }

/* ---------------- Toast 提示 ---------------- */
#toast-wrap {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  pointer-events: none;
}
.toast {
  padding: 10px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  box-shadow: var(--shadow-lg);
  animation: toast-in 0.25s ease;
  pointer-events: auto;
}
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.info { background: #2b3140; }
@keyframes toast-in {
  from { opacity: 0; transform: translateY(-14px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------------- 自定义确认弹窗 Modal ---------------- */
.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(15, 18, 28, 0.45);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: mask-in 0.18s ease;
}
@keyframes mask-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
.modal-box {
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(15, 18, 28, 0.25);
  width: 100%;
  max-width: 380px;
  padding: 24px 26px;
  animation: modal-in 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes modal-in {
  from { opacity: 0; transform: translateY(16px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(229, 72, 77, 0.1);
  color: var(--danger);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin: 0 auto 14px;
}
.modal-title {
  text-align: center;
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}
.modal-text {
  text-align: center;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
  word-break: break-all;
  margin-bottom: 22px;
}
.modal-actions {
  display: flex;
  gap: 10px;
}
.modal-actions .btn {
  flex: 1;
  justify-content: center;
  padding: 11px;
  font-size: 14.5px;
}

/* ---------------- 编辑弹窗 ---------------- */
.modal-edit { max-width: 560px; padding: 22px 24px; }
.modal-edit .modal-icon { background: rgba(79, 110, 247, 0.1); color: var(--primary); }
.modal-edit .modal-title { margin-bottom: 14px; }

.edit-body { max-height: 60vh; overflow-y: auto; padding-right: 4px; }
.edit-body .field { margin-bottom: 14px; }
.edit-body .field:last-child { margin-bottom: 4px; }
.edit-body label { font-size: 13.5px; font-weight: 600; margin-bottom: 6px; display: block; }
.edit-hint { font-size: 12px; color: var(--text-2); font-weight: 400; }

.edit-content {
  min-height: 150px;
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.6;
  resize: vertical;
}

.edit-file-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
  flex-wrap: wrap;
}
.edit-file-name {
  font-size: 12.5px;
  color: var(--success);
  font-weight: 600;
}

/* ---------------- 密码输入弹窗 ---------------- */
.modal-pwd { max-width: 340px; }
.modal-pwd .modal-icon { background: rgba(79, 110, 247, 0.1); color: var(--primary); }
.modal-pwd .modal-title { margin-bottom: 6px; }
.modal-pwd-sub {
  text-align: center;
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 16px;
}
.pwd-input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  text-align: center;
  letter-spacing: 2px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  margin-bottom: 18px;
}
.pwd-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 110, 247, 0.12);
}
.pwd-error {
  display: none;
  text-align: center;
  font-size: 13px;
  color: var(--danger);
  margin: -12px 0 14px;
}
.pwd-error.show { display: block; }

/* ---------------- 添加页 ---------------- */
.page-wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 30px 24px 70px;
}

.page-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}
.page-head h2 { font-size: 22px; }

.form-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 26px 28px;
}

.field { margin-bottom: 20px; }
.field > label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}
.field .hint { font-size: 12.5px; color: var(--text-2); margin-top: 6px; }

.input, .select, textarea.input {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.input:focus, .select:focus, textarea.input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 110, 247, 0.12);
}
textarea.input {
  min-height: 260px;
  resize: vertical;
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 13.5px;
  line-height: 1.6;
}

/* 模式切换 */
.mode-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 18px;
}
.mode-tab {
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-2);
  background: var(--bg);
  border: 1px solid var(--border);
  transition: all 0.15s ease;
}
.mode-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* 文件上传拖拽区 */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 46px 20px;
  text-align: center;
  transition: all 0.2s ease;
  cursor: pointer;
  background: #fafbfe;
}
.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--primary);
  background: rgba(79, 110, 247, 0.05);
}
.drop-zone .dz-icon { font-size: 40px; margin-bottom: 12px; }
.drop-zone .dz-text { font-size: 15px; font-weight: 600; margin-bottom: 5px; }
.drop-zone .dz-sub { font-size: 13px; color: var(--text-2); }
.drop-zone input[type="file"] { display: none; }
.drop-zone.has-file {
  border-style: solid;
  border-color: var(--success);
  background: rgba(48, 164, 108, 0.06);
  padding: 24px 20px;
}
.drop-zone.has-file .dz-filename {
  font-weight: 700;
  color: var(--success);
  font-size: 14.5px;
  word-break: break-all;
}

/* 表单底部按钮 */
.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 26px;
}
.form-actions .btn { flex: 1; justify-content: center; padding: 12px; font-size: 15px; }

/* ---------------- 查看页 ---------------- */
.view-toolbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: rgba(31, 36, 48, 0.92);
  backdrop-filter: blur(10px);
  color: #fff;
  flex-wrap: wrap;
}
.view-toolbar .vt-title {
  font-size: 14px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 320px;
}
.view-toolbar .vt-spacer { flex: 1; }
.view-toolbar .btn {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  padding: 7px 13px;
  font-size: 13px;
}
.view-toolbar .btn:hover { background: var(--primary); }

.view-frame-wrap {
  position: fixed;
  top: 52px;
  left: 0;
  right: 0;
  bottom: 0;
  background: #fff;
}
.view-frame-wrap iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* ---------------- 响应式 ---------------- */

/* 平板（641-1024px）：单行紧凑布局 */
@media (max-width: 1024px) {
  .topbar-inner {
    grid-template-columns: auto minmax(150px, 1fr) auto auto;
    gap: 10px;
    padding: 10px 16px;
  }
  .logo { font-size: 17px; }
  .logo-text { letter-spacing: 0; }
  .search-wrap { max-width: 260px; }
}

/* 手机（≤640px）：两行布局
   第 1 行：logo + 复制图标 + 添加图标
   第 2 行：搜索框通栏占满 */
@media (max-width: 640px) {
  .topbar-inner {
    grid-template-columns: 1fr auto auto;
    gap: 8px 10px;
    padding: 10px 14px;
  }
  /* 第 1 行 */
  .logo { grid-column: 1; grid-row: 1; font-size: 15px; min-width: 0; }
  .logo-icon { width: 28px; height: 28px; font-size: 14px; border-radius: 8px; }
  .logo-text { overflow: hidden; text-overflow: ellipsis; }
  .copy-btn { grid-column: 2; grid-row: 1; }
  .add-btn { grid-column: 3; grid-row: 1; }
  /* 第 2 行：搜索框通栏 */
  .search-wrap {
    grid-column: 1 / -1;
    grid-row: 2;
    max-width: none;
    justify-self: stretch;
    padding: 8px 14px;
  }
  /* 按钮瘦身：手机上只保留图标 */
  .copy-btn { padding: 8px 11px; }
  .copy-text { display: none; }
  .add-btn { padding: 8px 13px; font-size: 16px; }
  .add-text { display: none; }
  /* 返回按钮占满剩余空间靠右 */
  .back-btn { grid-column: 2 / -1; grid-row: 1; justify-self: end; padding: 8px 12px; }

  .cards-wrap, .cats-bar { padding: 0 14px; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(105px, 1fr)); gap: 10px; }

  /* 移动端小卡片：紧凑封面 + 精简信息 */
  .card-body { padding: 8px 9px 10px; }
  .card-title {
    font-size: 12px;
    line-height: 1.35;
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
  }
  .card-meta .badge {
    font-size: 10px;
    padding: 2px 6px;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .card-time { display: none; }   /* 小卡片隐藏时间，保持干净 */
  .card-hover-actions { display: none; }  /* 手机无 hover，操作走详情页/长按 */
  .page-wrap { padding: 20px 16px 60px; }
  .view-toolbar { padding: 8px 10px; gap: 6px; }
  .view-toolbar .vt-title { max-width: 110px; font-size: 13px; }
  .view-toolbar #open-btn { display: none; } /* 手机上隐藏次要按钮，保持工具条单行 */
  .view-frame-wrap { top: 46px; }
  .view-toolbar .btn { padding: 6px 10px; font-size: 12.5px; }
}