:root {
  --bg: #f6f6f4;
  --fg: #222;
  --muted: #777;
  --border: #d8d8d4;
  --primary: #2b6cb0;
  --primary-fg: #fff;
  --danger: #b3392f;
  --secondary: #e4e4dd;
  --note-shadow: 0 6px 14px rgba(0,0,0,.10), 0 1px 2px rgba(0,0,0,.05);

  --status-start:    #fde68a;
  --status-80:       #f59e0b;
  --status-done:     #86efac;
  --status-reported: #cbd5e1;

  --due-over:  #b91c1c;
  --due-today: #ea580c;
  --due-soon:  #d97706;
  --due-week:  #ca8a04;
  --due-far:   #6b7280;

  --quad-tl: #ffe9e9;
  --quad-tr: #fff4d6;
  --quad-bl: #e8f3ff;
  --quad-br: #efeef0;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI", "Meiryo", sans-serif;
  color: var(--fg);
  background: var(--bg);
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.muted { color: var(--muted); font-size: 12px; }
button { font: inherit; cursor: pointer; }

/* ---- Auth ---- */
.auth-page { display: grid; place-items: center; min-height: 100vh; padding: 16px; }
.auth-card {
  background: #fff; border: 1px solid var(--border);
  border-radius: 12px; padding: 24px; width: 100%; max-width: 360px;
  box-shadow: 0 4px 14px rgba(0,0,0,.05);
}
.auth-card h1 { margin: 0 0 4px; font-size: 20px; }
.auth-form { display: grid; gap: 12px; margin-top: 16px; }
.auth-form input { width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; }
.auth-actions { display: flex; gap: 8px; }
.auth-actions button { flex: 1; padding: 10px; border-radius: 6px; border: 1px solid var(--primary); background: var(--primary); color: var(--primary-fg); }
.auth-actions .secondary { background: #fff; color: var(--primary); }
.error { background: #fee2e2; color: #991b1b; padding: 8px 10px; border-radius: 6px; margin-top: 12px; font-size: 14px; }

/* ---- Topbar ---- */
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  background: #fff; padding: 8px 16px; border-bottom: 1px solid var(--border);
  gap: 12px; flex-wrap: wrap;
}
.topbar-left { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.topbar-right { display: flex; align-items: center; gap: 12px; }
.board-tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.board-tabs .tab {
  background: var(--secondary); border: 1px solid var(--border);
  padding: 6px 12px; border-radius: 999px; font-size: 13px;
}
.board-tabs .tab.active { background: var(--primary); color: var(--primary-fg); border-color: var(--primary); }
.board-tabs .tab-add { font-weight: bold; padding: 6px 10px; }

/* ---- Toolbar ---- */
.toolbar {
  display: flex; gap: 8px; padding: 10px 16px; align-items: center; flex-wrap: wrap;
  background: #fff; border-bottom: 1px solid var(--border);
}
.toolbar select { padding: 6px 8px; border: 1px solid var(--border); border-radius: 6px; }
.toolbar button { padding: 6px 12px; border-radius: 6px; border: 1px solid var(--border); background: #fff; }
.toolbar button.primary { background: var(--primary); color: var(--primary-fg); border-color: var(--primary); }
.toolbar button.secondary { background: #fff; }
.toolbar button.danger-text { color: var(--danger); }
.toolbar button:disabled { opacity: .45; cursor: not-allowed; }

/* 役割バッジ */
.role-badge {
  display: inline-block; padding: 3px 10px; border-radius: 999px;
  font-size: 11px; font-weight: 600;
}
.role-badge.viewer { background: #fde68a; color: #78350f; }
.role-badge.editor { background: #bae6fd; color: #075985; }

/* ---- Board (PC) ---- */
.board-wrap {
  padding: 16px;
  height: calc(100vh - 110px);
  overflow: auto;
}
.board {
  position: relative;
  width: 100%;
  height: calc(100vh - 160px);
  min-height: 520px;
  background: #fff;
  border: 1px solid var(--border); border-radius: 12px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  user-select: none;
  -webkit-user-select: none;
}
.quadrant { position: relative; border: 1px dashed var(--border); }
.quadrant.q-tl { background: var(--quad-tl); }
.quadrant.q-tr { background: var(--quad-tr); }
.quadrant.q-bl { background: var(--quad-bl); }
.quadrant.q-br { background: var(--quad-br); }
.quad-label {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center; line-height: 1.3;
  font-size: clamp(20px, 3.2vw, 40px);
  font-weight: 700;
  color: rgba(0, 0, 0, .12);
  pointer-events: none;
}
.quad-label small {
  display: block;
  font-size: .6em; font-weight: 600;
  margin-top: 4px;
}

/* 区画の右上「⛶」ズームボタン */
.quad-zoom {
  position: absolute; top: 6px; right: 6px;
  width: 28px; height: 28px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 14px; line-height: 1;
  background: rgba(255,255,255,.85);
  border: 1px solid var(--border); border-radius: 6px;
  color: #444; z-index: 3;
}
.quad-zoom:hover { background: #fff; color: var(--primary); }

/* ズーム解除ボタン（拡大中のみ表示） */
.zoom-reset {
  position: fixed; right: 24px; bottom: 24px;
  padding: 10px 16px; border-radius: 999px;
  background: var(--primary); color: var(--primary-fg);
  border: none; box-shadow: 0 4px 14px rgba(0,0,0,.2);
  font-size: 13px; z-index: 40;
}
.zoom-reset:hover { background: #235a96; }

/* 拡大表示中のボード（.board の幅・高さは JS でインライン設定） */
.board.zoomed { max-width: none; cursor: grab; }
.board.zoomed.panning { cursor: grabbing; }
.board.zoomed.panning .note { pointer-events: none; }
.axis-x {
  position: absolute; left: 0; right: 0; bottom: 4px; text-align: center;
  font-size: 11px; color: #888; pointer-events: none;
}
.axis-y {
  position: absolute; top: 50%; left: 4px; transform: translateY(-50%);
  font-size: 11px; color: #888; pointer-events: none; line-height: 1.4;
}
.notes-layer { position: absolute; inset: 0; }

/* ---- Sticky Note ---- */
.note {
  position: absolute;
  width: 180px; min-height: 110px;
  background: var(--status-start);
  border-radius: 8px;
  padding: 10px 12px 26px;
  box-shadow: var(--note-shadow);
  cursor: grab;
  touch-action: none;
  user-select: none;
  font-size: 13px;
  transition: transform .25s ease, top .25s ease, left .25s ease;
}
.note.dragging { cursor: grabbing; transition: none; }
.note.status-start    { background: var(--status-start); }
.note.status-80       { background: var(--status-80); }
.note.status-done     { background: var(--status-done); }
.note.status-reported { background: var(--status-reported); }
.note .note-title { font-weight: 600; line-height: 1.3; word-break: break-word; }
.note .note-meta  { color: #444; font-size: 11px; margin-top: 4px; }
.note .due-badge {
  position: absolute; right: 8px; bottom: 6px; font-size: 10px;
  background: rgba(255,255,255,.7); padding: 2px 6px; border-radius: 10px; color: var(--due-far);
}
.note .due-badge.due-over  { color: var(--due-over);  background: #fee2e2; }
.note .due-badge.due-today { color: #fff; background: var(--due-today); }
.note .due-badge.due-soon  { color: #fff; background: var(--due-soon); }
.note .due-badge.due-week  { color: var(--due-week); background: #fef3c7; }

/* ---- Mobile list ---- */
.mobile-list { display: none; list-style: none; padding: 0; margin: 0; }
.mobile-list li {
  background: var(--status-start); padding: 12px 14px; margin: 0 16px 10px;
  border-radius: 8px; box-shadow: var(--note-shadow); cursor: pointer;
  display: grid; grid-template-columns: 1fr auto; gap: 4px;
}
.mobile-list li.status-start    { background: var(--status-start); }
.mobile-list li.status-80       { background: var(--status-80); }
.mobile-list li.status-done     { background: var(--status-done); }
.mobile-list li.status-reported { background: var(--status-reported); }
.mobile-list .title { font-weight: 600; }
.mobile-list .meta { font-size: 11px; color: #444; grid-column: 1 / -1; }
.mobile-list .due-badge {
  font-size: 11px; align-self: center; padding: 2px 8px; border-radius: 10px;
  background: rgba(255,255,255,.7); color: var(--due-far);
}
.mobile-list .due-badge.due-over  { color: var(--due-over);  background: #fee2e2; }
.mobile-list .due-badge.due-today { color: #fff; background: var(--due-today); }
.mobile-list .due-badge.due-soon  { color: #fff; background: var(--due-soon); }
.mobile-list .due-badge.due-week  { color: var(--due-week); background: #fef3c7; }

@media (max-width: 768px) {
  .board { display: none; }
  .mobile-list { display: block; padding-top: 8px; }
  .toolbar { gap: 6px; }
}

/* ---- Modal ---- */
.modal {
  position: fixed; inset: 0; background: rgba(0,0,0,.4);
  display: grid; place-items: center; z-index: 50; padding: 16px;
}
.modal[hidden] { display: none; }
.modal-card {
  background: #fff; border-radius: 12px; width: 100%; max-width: 520px;
  max-height: 90vh; display: flex; flex-direction: column;
}
.modal-card.modal-wide { max-width: 820px; }
.modal-head { display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.modal-head h2 { margin: 0; font-size: 18px; }
.modal-head .close { background: none; border: none; font-size: 22px; line-height: 1; }
.modal-body { padding: 14px 18px; overflow: auto; display: grid; gap: 12px; }
.modal-body label { display: grid; gap: 4px; font-size: 13px; }
.modal-body input[type=text],
.modal-body input[type=number],
.modal-body input[type=date],
.modal-body input:not([type]),
.modal-body select,
.modal-body textarea {
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; font: inherit;
}
.modal-body fieldset { border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; display: grid; gap: 8px; }
.modal-body fieldset.cost-fields {
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 8px 10px;
}
.modal-body fieldset.cost-fields label {
  font-size: 12px; gap: 2px;
}
.modal-body fieldset.cost-fields input,
.modal-body fieldset.cost-fields select {
  width: 100%; padding: 5px 6px; font-size: 13px;
}
.modal-body legend { padding: 0 6px; font-size: 12px; color: var(--muted); }
.seg { display: flex; gap: 6px; flex-wrap: wrap; }
.seg label { display: inline-flex; align-items: center; gap: 4px; padding: 6px 10px; border: 1px solid var(--border); border-radius: 999px; cursor: pointer; }
.seg input { display: none; }
.seg input:checked + span { font-weight: 700; }
.seg label:has(input:checked) { background: var(--primary); color: var(--primary-fg); border-color: var(--primary); }
.quick-due { display: flex; gap: 6px; flex-wrap: wrap; }
.quick-due button { padding: 4px 10px; border: 1px solid var(--border); background: #fff; border-radius: 999px; font-size: 12px; }
.quick-due button.secondary { color: var(--muted); }
.modal-foot { display: flex; gap: 8px; padding: 12px 18px; border-top: 1px solid var(--border); }
.modal-foot .spacer { flex: 1; }
.modal-foot button { padding: 8px 14px; border: 1px solid var(--border); border-radius: 6px; background: #fff; }
.modal-foot button.primary { background: var(--primary); color: var(--primary-fg); border-color: var(--primary); }
.modal-foot button.secondary { background: #fff; }
.modal-foot button.danger { background: var(--danger); color: #fff; border-color: var(--danger); }

/* ---- Archive ---- */
.archive-main { padding: 16px; }
.archive-table { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.archive-table th, .archive-table td { padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 13px; text-align: left; }
.archive-table th { background: #fafaf7; font-weight: 600; color: #555; }
.archive-table tr:last-child td { border-bottom: none; }
.archive-table .td-actions { white-space: nowrap; }
.archive-table .td-actions button { padding: 4px 8px; margin-right: 4px; border: 1px solid var(--border); background: #fff; border-radius: 6px; }
.archive-table .td-title .link { background: none; border: none; color: var(--primary); cursor: pointer; padding: 0; font: inherit; }
.archive-table .danger-text { color: var(--danger); }

@media (max-width: 768px) {
  .archive-table { font-size: 12px; display: block; overflow-x: auto; }
}

/* archive detail modal */
.kv { display: grid; grid-template-columns: 100px 1fr; gap: 8px; padding: 4px 0; border-bottom: 1px dashed var(--border); }
.kv .k { color: var(--muted); font-size: 12px; }
.kv .v { font-size: 14px; word-break: break-word; }
.kv .v.body { background: #fafaf6; padding: 8px; border-radius: 6px; white-space: pre-wrap; font-family: inherit; margin: 0; }

/* ---- 共有メンバー一覧 ---- */
.member-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.member-list li {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  background: #fafaf7;
}
.member-list .m-check { display: flex; align-items: center; gap: 8px; flex: 1; cursor: pointer; }
.member-list .m-name  { font-size: 13px; }
.member-list .m-role  { padding: 4px 6px; border: 1px solid var(--border); border-radius: 6px; font-size: 12px; background: #fff; }

/* ---- 操作履歴テーブル ---- */
.history-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.history-table th, .history-table td {
  padding: 6px 10px; border-bottom: 1px solid var(--border); text-align: left;
  vertical-align: top;
}
.history-table th { background: #fafaf7; font-weight: 600; color: #555; font-size: 12px; }
.history-table td:first-child { white-space: nowrap; color: var(--muted); font-size: 12px; }
.history-table td:nth-child(2) { white-space: nowrap; }
.history-table tr:last-child td { border-bottom: none; }