/* paper-tracker 简洁样式 */
:root {
  --bg: #f7f7fa;
  --fg: #1f2328;
  --muted: #6e7681;
  --primary: #2f6feb;
  --primary-hover: #1f5ddb;
  --border: #d0d7de;
  --card: #ffffff;
  --card-hover: #fafbfc;
  --success: #1a7f37;
  --warning: #bf8700;
  --danger: #cf222e;
  --abstract-zh-bg: #fff8e6;
  --abstract-en-bg: #f6f8fa;
  --th-bg: #f6f8fa;
  --tag-bg: #eaeef2;
}

/* 深色模式 */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --muted: #8b949e;
    --primary: #58a6ff;
    --primary-hover: #79b8ff;
    --border: #30363d;
    --card: #161b22;
    --card-hover: #1c2128;
    --success: #3fb950;
    --warning: #d29922;
    --danger: #f85149;
    --abstract-zh-bg: #2d2200;
    --abstract-en-bg: #161b22;
    --th-bg: #21262d;
    --tag-bg: #21262d;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.navbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0 16px;
  height: 50px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.navbar .brand {
  font-weight: 600;
  font-size: 16px;
  color: var(--fg);
  white-space: nowrap;
}
.navbar .nav-spacer { flex: 1; }
.navbar a { color: var(--fg); }
.navbar a:hover { color: var(--primary); }

.container {
  max-width: 1200px;
  margin: 16px auto;
  padding: 0 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 14px;
}

.card h2 {
  margin: 0 0 10px 0;
  font-size: 16px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}
.card h2 .btn-small {
  float: none;
}

.btn, .btn-small {
  display: inline-block;
  padding: 8px 16px;
  min-height: 40px;
  background: var(--primary);
  color: #fff !important;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.btn:hover, .btn-small:hover {
  background: var(--primary-hover);
  text-decoration: none;
}
.btn-secondary {
  background: var(--card);
  color: var(--fg) !important;
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--card-hover); }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #a40e1a; }

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}
th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th {
  background: var(--th-bg);
  font-weight: 600;
  font-size: 13px;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--card-hover); }

.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  background: var(--tag-bg);
  color: var(--muted);
}
.tag.ok { background: #dcfce7; color: var(--success); }
.tag.warn { background: #fef3c7; color: var(--warning); }
.tag.err { background: #fee2e2; color: var(--danger); }
@media (prefers-color-scheme: dark) {
  .tag.ok { background: #0d2818; }
  .tag.warn { background: #2d2200; }
  .tag.err { background: #3b0d0d; }
}

input[type=text], input[type=password], input[type=number],
input[type=date], select, textarea {
  width: 100%;
  padding: 8px 10px;
  min-height: 40px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 16px; /* ≥16px 防止 iOS Safari 自动放大 */
  font-family: inherit;
  background: var(--card);
  color: var(--fg);
}
textarea { min-height: 80px; resize: vertical; }
label {
  display: block;
  margin: 8px 0 4px 0;
  font-weight: 500;
  font-size: 13px;
  color: var(--fg);
}
.form-row { margin-bottom: 10px; }
.form-actions { margin-top: 14px; display: flex; gap: 8px; }

.filter-bar {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
  margin-bottom: 12px;
  align-items: end;
}
.filter-bar .form-row { margin: 0; }

.paper-title {
  font-weight: 500;
  color: var(--fg);
}
.paper-authors {
  color: var(--muted);
  font-size: 12px;
  margin-top: 3px;
}
.paper-meta {
  color: var(--muted);
  font-size: 12px;
  margin-top: 3px;
}

.abstract-en {
  background: var(--abstract-en-bg);
  padding: 12px 14px;
  border-left: 3px solid var(--border);
  white-space: pre-wrap;
  margin: 8px 0;
  font-size: 14px;
  line-height: 1.7;
}
.abstract-zh {
  background: var(--abstract-zh-bg);
  padding: 12px 14px;
  border-left: 3px solid var(--warning);
  white-space: pre-wrap;
  margin: 8px 0;
  font-size: 15px;
  line-height: 1.8;
}

/* TL;DR 突出展示 */
.tldr-box {
  background: var(--abstract-zh-bg);
  border: 1px solid var(--warning);
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 14px;
}
.tldr-box .tldr-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--warning);
  margin-bottom: 4px;
}
.tldr-box .tldr-content {
  font-size: 16px;
  line-height: 1.7;
  color: var(--fg);
}

.pagination {
  margin-top: 14px;
  display: flex;
  gap: 8px;
  justify-content: center;
}

.alert {
  padding: 10px 14px;
  border-radius: 4px;
  margin-bottom: 12px;
}
.alert-error { background: #fee2e2; color: var(--danger); }
.alert-success { background: #dcfce7; color: var(--success); }
@media (prefers-color-scheme: dark) {
  .alert-error { background: #3b0d0d; }
  .alert-success { background: #0d2818; }
}

.login-box {
  max-width: 360px;
  margin: 60px auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 28px 30px;
}
.login-box h1 {
  margin: 0 0 18px 0;
  font-size: 20px;
  text-align: center;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.checkbox-row input[type=checkbox] {
  width: auto;
  min-height: 0;
}

/* 高级搜索折叠面板 */
.advanced-search {
  margin: 10px 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0 12px;
  background: var(--card-hover);
}
.advanced-toggle {
  cursor: pointer;
  font-weight: 500;
  font-size: 14px;
  padding: 8px 0;
  color: var(--primary);
  user-select: none;
}
.advanced-toggle:hover {
  color: var(--primary-hover);
}
details.advanced-search[open] .advanced-toggle {
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}
.advanced-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
  padding-bottom: 8px;
}
.advanced-grid .form-row {
  margin: 0;
}

/* ============ 搜索 Tab 切换 ============ */
.search-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 14px;
  border-bottom: 2px solid var(--border);
}
.search-tab {
  flex: 1;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.15s, border-color 0.15s;
  min-height: auto;
}
.search-tab:hover {
  color: var(--fg);
}
.search-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* ============ 联网搜索结果卡片 ============ */
.online-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 10px;
}
.online-card .online-title {
  font-weight: 600;
  font-size: 15px;
  line-height: 1.4;
  color: var(--fg);
  margin-bottom: 4px;
}
.online-card .online-meta {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}
.online-card .online-abstract {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

/* ============ 移动端卡片布局 ============ */
.paper-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 10px;
  display: block;
  color: inherit;
  text-decoration: none;
}
.paper-card:active {
  background: var(--card-hover);
}
.paper-card .pc-title {
  font-weight: 600;
  font-size: 15px;
  line-height: 1.4;
  color: var(--fg);
  margin-bottom: 4px;
}
.paper-card .pc-meta {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}
.paper-card .pc-abstract {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.paper-card .pc-tags {
  margin-top: 8px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

/* 移动端筛选按钮 */
.mobile-filter-btn {
  display: none;
}

/* ============ 响应式断点 ≤768px ============ */
@media (max-width: 768px) {
  .navbar {
    padding: 0 10px;
    gap: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .navbar .brand { font-size: 14px; }
  .navbar a, .navbar button { font-size: 13px; white-space: nowrap; }

  .container {
    margin: 8px auto;
    padding: 0 8px;
  }

  .card {
    padding: 12px;
    border-radius: 6px;
  }

  /* 筛选面板默认隐藏，通过按钮触发 */
  .filter-card {
    display: none;
  }
  .filter-card.open {
    display: block;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    top: 50px;
    z-index: 1000;
    background: var(--bg);
    overflow-y: auto;
    padding: 16px;
    animation: slideUp 0.2s ease;
  }
  @keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
  }
  .mobile-filter-btn {
    display: inline-flex;
    width: 100%;
    margin-bottom: 10px;
  }
  .mobile-filter-close {
    display: inline-block;
    margin-bottom: 10px;
  }
  @media (min-width: 769px) {
    .mobile-filter-close { display: none; }
  }

  .filter-bar {
    grid-template-columns: 1fr;
  }
  .advanced-grid {
    grid-template-columns: 1fr;
  }

  /* 修复 h2 内浮动按钮在窄屏错位 — 已全局使用 flex */
  .card h2 .btn-small,
  .card h2 .btn-small.btn-danger {
    margin: 2px 0;
    font-size: 12px;
    padding: 4px 10px;
  }
  /* "全部入库" 按钮在搜索结果卡片头部 */
  #online-results .card h2 .btn-small {
    order: 1;
    margin-left: auto;
  }

  /* 隐藏表格，显示卡片 */
  .paper-table-wrapper {
    display: none;
  }
  .paper-cards {
    display: block;
  }

  /* 详情页：中文在前英文折叠 */
  .detail-zh-first .zh-section { order: -1; }
  .detail-en-collapse { display: none; }
  .detail-en-collapse.open { display: block; }

  /* PDF embed 高度适配 */
  embed[type="application/pdf"] {
    height: 500px !important;
  }

  .form-actions {
    flex-wrap: wrap;
  }
  .btn, .btn-small {
    flex: 1;
    min-width: 120px;
  }
}

/* 桌面端隐藏卡片视图 */
@media (min-width: 769px) {
  .paper-cards { display: none; }
  .mobile-filter-btn { display: none; }
  .mobile-filter-close { display: none; }
  .detail-en-collapse { display: block !important; }
}

/* ================ Toast 通知 ================ */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 99999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.toast {
  pointer-events: auto;
  padding: 12px 20px;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
  font-size: 14px;
  line-height: 1.5;
  color: #fff;
  opacity: 0;
  transform: translateX(40px);
  animation: toastIn 0.3s ease forwards, toastOut 0.3s ease 3.7s forwards;
  max-width: 400px;
  word-break: break-word;
}
.toast-success { background: var(--success); }
.toast-error   { background: var(--danger); }
.toast-info    { background: var(--primary); }
.toast-warning { background: var(--warning); }
@keyframes toastIn  { to { opacity: 1; transform: translateX(0); } }
@keyframes toastOut { to { opacity: 0; transform: translateX(40px); } }