:root {
  --bg: #ffffff;
  --panel: #ffffff;
  --panel-2: #f2f4f7;
  --soft: #f7f8fa;
  --line: #e3e6ea;
  --line-strong: #cbd2da;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #f59e0b;
  --primary-ink: #3a2803;
  --link: #2563eb;
  --danger: #dc2626;
  --ok: #16a34a;
  --shadow: 0 8px 28px rgba(15, 23, 42, .10);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.6 -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  padding-bottom: 78px;
}

/* ---------- 登录 ---------- */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
  background: var(--soft);
}
.login-box {
  width: 360px;
  max-width: 100%;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 30px 26px;
  box-shadow: var(--shadow);
}
.login-title { margin: 0 0 4px; font-size: 20px; text-align: center; }
.login-sub { margin: 0 0 22px; font-size: 13px; color: var(--muted); text-align: center; }
.login-error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #b91c1c;
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 13px;
  margin-bottom: 16px;
}

/* ---------- 表单控件 ---------- */
.field { display: block; margin-bottom: 14px; }
.field > span { display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.field input {
  width: 100%;
  padding: 10px 12px;
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
}
.field input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, .18);
}

.btn {
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 13px;
  cursor: pointer;
  background: var(--panel-2);
  color: var(--text);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}
.btn:hover { filter: brightness(.97); }
.btn-primary { background: var(--primary); color: var(--primary-ink); font-weight: 600; }
.btn-primary:hover { filter: brightness(1.05); }
.btn-ghost { background: #fff; border-color: var(--line-strong); color: var(--muted); }
.btn-ghost:hover { color: var(--text); border-color: var(--muted); }
.btn-block { width: 100%; padding: 11px; font-size: 15px; margin-top: 6px; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-danger { color: var(--danger); border-color: #fecaca; background: #fff; }
.btn-danger:hover { background: #fef2f2; border-color: var(--danger); }
.btn[disabled] { opacity: .45; cursor: not-allowed; filter: none; }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 20px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.brand { font-size: 16px; font-weight: 600; letter-spacing: .5px; }
.topbar-right { display: flex; align-items: center; gap: 12px; }
.save-state { font-size: 12px; color: var(--muted); }
.save-state.dirty { color: #b45309; }

/* ---------- 分组 tab ---------- */
.tabs {
  display: flex;
  gap: 8px;
  padding: 14px 20px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.tab {
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--muted);
  padding: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
}
.tab:hover { color: var(--text); border-color: var(--muted); }
.tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--primary-ink);
  font-weight: 600;
}
.tab .count { opacity: .75; margin-left: 4px; font-size: 12px; }

/* ---------- 面板 ---------- */
.wrap { padding: 18px 20px 24px; }
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(15, 23, 42, .06);
}
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
.panel-title { font-size: 15px; font-weight: 600; }
.panel-note { font-size: 12px; color: var(--muted); margin-left: 8px; font-weight: 400; }

table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-size: 12px; color: var(--muted); font-weight: 500; background: var(--soft); }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--soft); }

.col-thumb { width: 108px; }
.col-sort { width: 80px; }
.col-ops { width: 130px; text-align: right; }
td.col-ops { text-align: right; white-space: nowrap; }
.col-ops .btn + .btn { margin-left: 6px; }

.thumb {
  width: 88px;
  height: 40px;
  object-fit: cover;
  border-radius: 6px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  display: block;
}
.thumb-none { font-size: 11px; color: var(--muted); }

.url {
  display: block;
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text);
  font-size: 13px;
}
.url.link { color: var(--link); }
.empty { padding: 28px; text-align: center; color: var(--muted); font-size: 13px; }

/* ---------- 底部保存栏 ---------- */
.savebar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  background: #fff;
  border-top: 1px solid var(--line);
  box-shadow: 0 -4px 16px rgba(15, 23, 42, .06);
  z-index: 20;
}
.savebar-inner {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  padding: 14px 20px;
}
.save-hint { margin-right: auto; font-size: 12px; color: var(--muted); }

/* ---------- 弹窗 ---------- */
.modal { position: fixed; inset: 0; z-index: 40; display: flex; align-items: center; justify-content: center; padding: 20px; }
.modal[hidden] { display: none; }
.modal-mask { position: absolute; inset: 0; background: rgba(15, 23, 42, .38); }
.modal-box {
  position: relative;
  width: 460px;
  max-width: 100%;
  max-height: 90vh;
  overflow: auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px;
  box-shadow: 0 24px 60px rgba(15, 23, 42, .22);
}
.modal-title { margin: 0 0 18px; font-size: 16px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }
.modal-error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #b91c1c;
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 13px;
}
.thumb-preview { margin: -6px 0 14px; }
.thumb-preview img {
  max-width: 100%;
  max-height: 90px;
  border-radius: 8px;
  border: 1px solid var(--line);
  display: block;
}

/* ---------- toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 92px;
  transform: translateX(-50%);
  background: #fff;
  color: var(--text);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 10px 18px;
  font-size: 13px;
  z-index: 60;
  box-shadow: var(--shadow);
}
.toast[hidden] { display: none; }
.toast.ok { border-color: #86efac; background: #f0fdf4; color: #15803d; }
.toast.err { border-color: #fecaca; background: #fef2f2; color: #b91c1c; }

@media (max-width: 720px) {
  .url { max-width: 150px; }
  .col-ops { width: auto; }
  th, td { padding: 8px; }
}