:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel2: #1e222b;
  --line: #2a2f3a;
  --txt: #e6e8ec;
  --mut: #8b93a3;
  --accent: #4f8cff;
  --todo: #8b93a3;
  --in_progress: #f5a623;
  --blocked: #ef5b6b;
  --done: #35c08a;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--txt);
  font: 15px/1.5 -apple-system, "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  -webkit-tap-highlight-color: transparent;
}
header {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 10px;
  padding: 12px 16px; padding-top: max(12px, env(safe-area-inset-top));
  background: var(--panel); border-bottom: 1px solid var(--line);
}
.hLeft { display: flex; align-items: center; gap: 10px; }
h1 { font-size: 18px; margin: 0; }
.badge {
  font-size: 12px; padding: 2px 8px; border-radius: 999px;
  background: #2a2f3a; color: var(--mut);
}
.badge.cloud { background: rgba(53,192,138,.15); color: var(--done); }
.hRight { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
select, input, textarea {
  background: var(--panel2); color: var(--txt);
  border: 1px solid var(--line); border-radius: 8px; padding: 7px 10px; font: inherit;
}
textarea { width: 100%; min-height: 70px; resize: vertical; }
.viewToggle { display: flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.viewBtn { background: var(--panel2); color: var(--mut); border: 0; padding: 7px 12px; cursor: pointer; }
.viewBtn.active { background: var(--accent); color: #fff; }
.count { color: var(--mut); font-size: 13px; }
.btn {
  background: var(--panel2); color: var(--txt); border: 1px solid var(--line);
  border-radius: 8px; padding: 7px 14px; cursor: pointer; font: inherit;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.danger { background: transparent; border-color: var(--blocked); color: var(--blocked); margin-right: auto; }

main { padding: 16px; }

/* 看板 */
.board { display: flex; gap: 14px; align-items: flex-start; overflow-x: auto; }
.col { flex: 0 0 280px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; }
.colHead { display: flex; align-items: center; justify-content: space-between; padding: 12px 14px; }
.colTitle { font-weight: 600; font-size: 14px; }
.colTitle::before { content: "●"; margin-right: 6px; }
.colTitle.todo { color: var(--todo); }
.colTitle.in_progress { color: var(--in_progress); }
.colTitle.blocked { color: var(--blocked); }
.colTitle.done { color: var(--done); }
.colCount { background: var(--panel2); color: var(--mut); border-radius: 999px; padding: 1px 9px; font-size: 12px; }
.colBody { padding: 0 10px 12px; min-height: 40px; display: flex; flex-direction: column; gap: 9px; }
.colBody.over { background: rgba(79,140,255,.08); border-radius: 8px; }
.card {
  background: var(--panel2); border: 1px solid var(--line); border-radius: 10px;
  padding: 11px 12px; cursor: pointer;
}
.card:active { cursor: grabbing; }
.cardTop { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 7px; }
.cardTitle { font-weight: 600; font-size: 14px; }
.cardContent { color: var(--mut); font-size: 12.5px; margin-top: 5px; white-space: pre-wrap; }
.tag { font-size: 11.5px; color: var(--mut); background: #2a2f3a; padding: 2px 7px; border-radius: 6px; }
.tag.proj { color: var(--accent); background: rgba(79,140,255,.12); }
.ownerChip { font-size: 11px; padding: 2px 8px; border-radius: 999px; white-space: nowrap; }
.ownerChip.me { background: rgba(79,140,255,.15); color: var(--accent); }
.ownerChip.ai { background: rgba(245,166,35,.15); color: var(--in_progress); }

/* 清單 */
.list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 18px; }
.group { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.groupHead { display: flex; align-items: center; gap: 10px; padding: 12px 16px; border-bottom: 1px solid var(--line); }
.groupTitle { font-weight: 700; color: var(--accent); }
.rowItem { display: flex; align-items: center; gap: 12px; padding: 11px 16px; border-bottom: 1px solid var(--line); cursor: pointer; }
.rowItem:last-child { border-bottom: 0; }
.check { width: 22px; height: 22px; border-radius: 50%; border: 2px solid var(--line); background: transparent; color: #fff; cursor: pointer; flex: 0 0 auto; }
.check.done { background: var(--done); border-color: var(--done); }
.rowMid { flex: 1; min-width: 0; }
.rowTitle { font-weight: 600; }
.rowTitle.struck { text-decoration: line-through; color: var(--mut); }
.rowSub { display: flex; gap: 8px; margin-top: 3px; align-items: center; }
.statusDot { font-size: 11.5px; }
.statusDot::before { content: "● "; }
.statusDot.todo { color: var(--todo); }
.statusDot.in_progress { color: var(--in_progress); }
.statusDot.blocked { color: var(--blocked); }
.statusDot.done { color: var(--done); }

/* Modal */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,.55); display: none; align-items: center; justify-content: center; padding: 16px; z-index: 20; }
.modal.open { display: flex; }
.modalBox { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; width: 100%; max-width: 480px; max-height: 90vh; overflow: auto; padding: 20px; }
.modalBox h3 { margin: 0 0 14px; }
.form { display: flex; flex-direction: column; gap: 12px; }
.field { display: flex; flex-direction: column; gap: 5px; }
.flabel { font-size: 12.5px; color: var(--mut); }
.selRow { display: flex; gap: 12px; }
.selRow .field { flex: 1; }
.selRow select { width: 100%; }
.actions { display: flex; gap: 10px; margin-top: 18px; }
.actions .btn:not(.danger) { flex: 1; }

/* 截止日 badge */
.dueChip { display: inline-block; margin-top: 7px; font-size: 11.5px; color: var(--mut); background: #2a2f3a; padding: 2px 8px; border-radius: 6px; }
.dueChip.today { color: var(--in_progress); background: rgba(245,166,35,.15); }
.dueChip.overdue { color: var(--blocked); background: rgba(239,91,107,.15); }

/* 表格 */
.tableWrap { overflow-x: auto; }
.tbl { width: 100%; border-collapse: collapse; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.tbl th, .tbl td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); font-size: 13.5px; white-space: nowrap; }
.tbl th { color: var(--mut); font-weight: 600; font-size: 12.5px; background: var(--panel2); }
.tbl th.sortable { cursor: pointer; user-select: none; }
.tbl th.sortable:hover { color: var(--txt); }
.tbl tbody tr { cursor: pointer; }
.tbl tbody tr:hover { background: var(--panel2); }
.tbl tbody tr:last-child td { border-bottom: 0; }
.tblTitle { font-weight: 600; white-space: normal; }
.tblTitle.struck { text-decoration: line-through; color: var(--mut); }
.dueCell { color: var(--mut); }
.dueCell.overdue { color: var(--blocked); font-weight: 600; }

/* 心智圖 */
.mmWrap { overflow: auto; height: calc(100vh - 120px); border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
.mmEmpty { color: var(--mut); padding: 40px; text-align: center; }
.mmStage { position: relative; }
.mmSvg { position: absolute; inset: 0; }
.mmEdge { stroke: var(--line); stroke-width: 1.5; }
.mmEdge.proj { stroke: #3a4356; stroke-width: 2; }
.mmNode {
  position: absolute; transform: translate(-50%, -50%);
  padding: 6px 11px; border-radius: 999px; font-size: 12.5px; white-space: nowrap;
  background: var(--panel2); border: 1px solid var(--line); color: var(--txt);
  max-width: 170px; overflow: hidden; text-overflow: ellipsis;
}
.mmCenter { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 700; font-size: 14px; padding: 10px 16px; }
.mmProj { background: #232838; border-color: #3a4356; color: #cdd5e3; font-weight: 600; }
.mmLeaf { cursor: pointer; border-left-width: 3px; }
.mmLeaf:hover { background: #2a3142; }
.mmLeaf.todo { border-left-color: var(--todo); }
.mmLeaf.in_progress { border-left-color: var(--in_progress); }
.mmLeaf.blocked { border-left-color: var(--blocked); }
.mmLeaf.done { border-left-color: var(--done); color: var(--mut); text-decoration: line-through; }
.mmLeaf.overdue { border-left-color: var(--blocked); }

/* 登入 */
.loginBox { max-width: 360px; margin: 12vh auto 0; background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 28px 24px; display: flex; flex-direction: column; gap: 12px; }
.loginBox h2 { margin: 0; }
.loginHint { color: var(--mut); font-size: 13.5px; margin: 0; }
.loginBox input { width: 100%; }
.loginMsg { color: var(--mut); font-size: 13px; min-height: 18px; }

@media (max-width: 600px) {
  header { gap: 8px; }
  .hRight { width: 100%; }
  .board { gap: 10px; }
  .col { flex-basis: 78vw; }
  #projectFilter, #ownerFilter { flex: 1; min-width: 0; }
}