/* ===== 主题变量 ===== */
:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --border: #e5e7eb;
  --text: #1f2937;
  --text-soft: #6b7280;
  --text-faint: #9ca3af;
  --primary: #6366f1;
  --primary-2: #8b5cf6;
  --primary-soft: #eef2ff;
  --danger: #ef4444;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 8px 24px rgba(0,0,0,.04);
  --shadow-lg: 0 20px 50px rgba(0,0,0,.18);
  --radius: 14px;
}
[data-theme="dark"] {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-2: #172033;
  --border: #334155;
  --text: #e2e8f0;
  --text-soft: #94a3b8;
  --text-faint: #64748b;
  --primary: #818cf8;
  --primary-2: #a78bfa;
  --primary-soft: #1e2544;
  --shadow: 0 1px 3px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.3);
  --shadow-lg: 0 20px 50px rgba(0,0,0,.5);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Microsoft YaHei", "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

/* ===== 登录页 ===== */
.login-body {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh;
  background: radial-gradient(1200px 600px at 50% -10%, #312e81 0%, #0f172a 55%);
}
.login-card {
  width: 360px; max-width: 90vw; padding: 40px 32px;
  background: rgba(30,41,59,.85); backdrop-filter: blur(12px);
  border: 1px solid #334155; border-radius: 20px; text-align: center;
  box-shadow: var(--shadow-lg); color: #e2e8f0;
}
.login-logo { font-size: 40px; }
.login-card h1 { margin: 10px 0 2px; font-size: 22px; }
.login-sub { margin: 0 0 24px; color: #94a3b8; font-size: 13px; }
.login-card input {
  width: 100%; padding: 12px 14px; margin-bottom: 14px;
  border: 1px solid #475569; border-radius: 10px;
  background: #0f172a; color: #e2e8f0; font-size: 14px;
}
.login-card input:focus { outline: none; border-color: var(--primary); }
.login-card button {
  width: 100%; padding: 12px; border: 0; border-radius: 10px; cursor: pointer;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff; font-size: 15px; font-weight: 600; letter-spacing: 2px;
}
.login-error {
  background: #7f1d1d; color: #fecaca; padding: 10px;
  border-radius: 8px; font-size: 13px; margin-bottom: 14px;
}

/* ===== 布局 ===== */
.app { display: flex; height: 100vh; overflow: hidden; }

/* 侧栏 */
.sidebar {
  width: 260px; flex-shrink: 0; display: flex; flex-direction: column;
  background: var(--surface); border-right: 1px solid var(--border);
  padding: 18px 14px;
}
.brand { display: flex; align-items: center; gap: 10px; padding: 6px 8px 16px; }
.brand-logo { font-size: 24px; }
.brand-name { font-size: 17px; font-weight: 700; }

.btn-add { width: 100%; margin-bottom: 16px; }

.cat-nav { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 2px; }
.cat-item {
  display: flex; align-items: center; gap: 8px;
  padding: 9px 10px; border-radius: 10px; cursor: pointer;
  color: var(--text-soft); user-select: none;
}
.cat-item:hover { background: var(--surface-2); color: var(--text); }
.cat-item.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }
.cat-item .cat-ico { width: 18px; text-align: center; }
.cat-item .cat-label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cat-item .cat-count {
  font-size: 12px; background: var(--surface-2); color: var(--text-faint);
  padding: 1px 8px; border-radius: 10px;
}
.cat-item.active .cat-count { background: rgba(99,102,241,.18); color: var(--primary); }
.cat-item .cat-edit {
  opacity: 0; font-size: 12px; padding: 2px 4px; border-radius: 6px;
  color: var(--text-faint); background: transparent; border: 0; cursor: pointer;
}
.cat-item:hover .cat-edit { opacity: 1; }
.cat-item .cat-edit:hover { color: var(--primary); }
.cat-item.dragging { opacity: .4; }
.cat-item.drag-over { box-shadow: inset 0 2px 0 var(--primary); }

.cat-add-btn {
  margin-top: 8px; padding: 9px; width: 100%;
  background: transparent; border: 1px dashed var(--border);
  border-radius: 10px; color: var(--text-soft); cursor: pointer;
}
.cat-add-btn:hover { border-color: var(--primary); color: var(--primary); }

.sidebar-footer {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px;
  margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border);
}
.foot-btn {
  text-align: center; padding: 8px; border-radius: 9px; cursor: pointer;
  background: var(--surface-2); border: 1px solid var(--border);
  color: var(--text-soft); font-size: 13px;
}
.foot-btn:hover { color: var(--primary); border-color: var(--primary); }

/* 主区 */
.main { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.topbar {
  display: flex; align-items: center; gap: 16px;
  padding: 16px 24px; border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.menu-toggle { display: none; }
.icon-btn {
  background: transparent; border: 0; cursor: pointer; font-size: 18px;
  color: var(--text-soft); padding: 6px 10px; border-radius: 8px;
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }

.search-box {
  flex: 1; max-width: 460px; position: relative;
}
.search-ico { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); opacity: .5; }
.search-box input {
  width: 100%; padding: 10px 12px 10px 36px;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface-2); color: var(--text); font-size: 14px;
}
.search-box input:focus { outline: none; border-color: var(--primary); background: var(--surface); }
.view-title { margin: 0 0 0 auto; font-size: 16px; font-weight: 600; }

.toolbar {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 24px 0;
}
.count-hint { color: var(--text-faint); font-size: 13px; }

.batch-bar {
  display: flex; align-items: center; gap: 16px;
  padding: 12px 24px; background: var(--primary-soft);
  border-bottom: 1px solid var(--border);
}
.batch-bar .chk { display: flex; align-items: center; gap: 6px; cursor: pointer; }
.batch-actions { margin-left: auto; display: flex; gap: 8px; align-items: center; }
.batch-actions select {
  padding: 7px 10px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text);
}

/* 卡片网格 */
.grid {
  flex: 1; overflow-y: auto; padding: 20px 24px;
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  align-content: start;
}
.card {
  position: relative; display: flex; gap: 12px;
  padding: 14px; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow); cursor: pointer;
  transition: transform .12s, box-shadow .12s, border-color .12s;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); border-color: var(--primary); }
.card.dragging { opacity: .4; }
.card.drag-over { border-color: var(--primary); box-shadow: inset 0 0 0 2px var(--primary); }
.card-fav {
  width: 36px; height: 36px; flex-shrink: 0; border-radius: 8px;
  background: var(--surface-2); object-fit: contain; padding: 4px;
}
.card-body { flex: 1; min-width: 0; }
.card-title {
  font-weight: 600; font-size: 14px; margin: 0 0 3px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.card-url {
  font-size: 12px; color: var(--text-faint);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.card-remark {
  font-size: 12px; color: var(--text-soft); margin-top: 6px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.card-tags { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 8px; }
.tag {
  font-size: 11px; padding: 2px 8px; border-radius: 20px;
  background: var(--primary-soft); color: var(--primary);
}
.card-ops {
  position: absolute; top: 10px; right: 10px; display: none; gap: 4px;
}
.card:hover .card-ops { display: flex; }
.card-ops button {
  border: 0; background: var(--surface-2); color: var(--text-soft);
  width: 26px; height: 26px; border-radius: 7px; cursor: pointer; font-size: 12px;
}
.card-ops button:hover { color: var(--primary); }
.card-ops .op-del:hover { color: var(--danger); }
.card-check { position: absolute; top: 12px; left: 12px; display: none; }
.batch-on .card-check { display: block; }
.batch-on .card-ops { display: none !important; }
.batch-on .card { cursor: default; padding-left: 40px; }

.empty {
  flex: 1; display: flex; flex-direction: column; align-items: center;
  justify-content: center; color: var(--text-faint);
}
.empty-ico { font-size: 48px; margin-bottom: 8px; }

/* ===== 按钮 ===== */
.btn-primary {
  padding: 10px 16px; border: 0; border-radius: 10px; cursor: pointer;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff; font-size: 14px; font-weight: 600;
}
.btn-primary:hover { opacity: .92; }
.btn-ghost {
  padding: 9px 14px; border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface); color: var(--text-soft); cursor: pointer; font-size: 13px;
}
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-danger {
  padding: 9px 16px; border: 0; border-radius: 10px; cursor: pointer;
  background: var(--danger); color: #fff; font-size: 14px;
}

/* ===== 弹窗 ===== */
.modal-mask, .confirm-mask {
  position: fixed; inset: 0; background: rgba(15,23,42,.55);
  display: flex; align-items: center; justify-content: center; z-index: 50;
  padding: 20px;
}
.modal {
  width: 480px; max-width: 100%; max-height: 90vh; overflow: auto;
  background: var(--surface); border-radius: 18px; box-shadow: var(--shadow-lg);
}
.modal-sm { width: 380px; }
.modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 20px; border-bottom: 1px solid var(--border);
}
.modal-head h3 { margin: 0; font-size: 16px; }
.modal-body { padding: 18px 20px; }
.modal-body label {
  display: block; font-size: 13px; color: var(--text-soft);
  margin: 14px 0 6px;
}
.modal-body label:first-child { margin-top: 0; }
.modal-body input, .modal-body textarea, .modal-body select {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border);
  border-radius: 9px; background: var(--surface-2); color: var(--text); font-size: 14px;
}
.modal-body input:focus, .modal-body textarea:focus, .modal-body select:focus {
  outline: none; border-color: var(--primary); background: var(--surface);
}
.modal-body textarea { resize: vertical; }
.url-row { display: flex; gap: 8px; }
.url-row input { flex: 1; }
.icon-row { display: flex; gap: 8px; align-items: center; }
.icon-preview {
  width: 38px; height: 38px; flex-shrink: 0; border-radius: 8px; padding: 4px;
  background: var(--surface-2); object-fit: contain;
}
.modal-foot {
  display: flex; justify-content: flex-end; gap: 10px;
  padding: 16px 20px; border-top: 1px solid var(--border);
}
.hint { color: var(--text-soft); font-size: 13px; margin: 0 0 12px; }

/* 确认框 */
.confirm {
  width: 320px; background: var(--surface); border-radius: 16px;
  padding: 24px; text-align: center; box-shadow: var(--shadow-lg);
}
.confirm p { margin: 0 0 20px; }
.confirm-btns { display: flex; gap: 10px; justify-content: center; }

/* Toast */
.toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%);
  background: #1f2937; color: #fff; padding: 11px 20px; border-radius: 10px;
  font-size: 14px; z-index: 100; box-shadow: var(--shadow-lg);
}
.toast.err { background: var(--danger); }
.toast.ok { background: #16a34a; }

/* ===== 响应式 ===== */
@media (max-width: 820px) {
  .sidebar {
    position: fixed; z-index: 40; height: 100%; left: -280px;
    transition: left .25s; box-shadow: var(--shadow-lg);
  }
  .sidebar.open { left: 0; }
  .menu-toggle { display: inline-block; }
  .view-title { display: none; }
}