:root {
  --paper: #f3efe6;
  --paper-line: #ded7c8;
  --card: #fffdf7;
  --ink: #1d1a15;
  --ink-soft: #6b6355;
  --ink-faint: #9a9182;
  --rule: #cdc5b4;
  --indigo: #23406b;
  --indigo-deep: #172c4a;
  --vermillion: #b5432c;
  --amber: #9c6b12;

  --label-red: #b5432c;
  --label-yellow: #c99311;
  --label-green: #4a7c48;
  --label-blue: #23406b;
  --label-gray: #8d8577;

  --radius: 3px;
  --shadow-card: 0 1px 0 rgba(29, 26, 21, .06), 0 2px 5px rgba(29, 26, 21, .07);
  --shadow-lift: 0 10px 26px rgba(29, 26, 21, .22);
}

* { box-sizing: border-box; }

/* hidden 属性を付けた要素は、下でどんな display を指定していても隠す */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--paper-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--paper-line) 1px, transparent 1px);
  background-size: 28px 28px, 28px 28px;
  background-position: -1px -1px;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* ---------- 注意文の帯 ---------- */

.notice {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 20px;
  background: var(--vermillion);
  color: #fdf6f2;
  font-size: 12.5px;
  letter-spacing: .02em;
  line-height: 1.5;
}

.notice__mark {
  flex: 0 0 auto;
  border: 1px solid rgba(253, 246, 242, .7);
  padding: 1px 7px;
  font-size: 11px;
  letter-spacing: .18em;
  text-indent: .18em;
}

/* ---------- 見出し ---------- */

.masthead {
  flex: 0 0 auto;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 28px 14px;
  border-bottom: 1px solid var(--rule);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .6);
}

.masthead h1 {
  font-family: "Shippori Mincho", "Hiragino Mincho ProN", serif;
  font-weight: 700;
  font-size: 27px;
  margin: 0;
  letter-spacing: .09em;
  text-indent: .09em;
}

.masthead__sub {
  margin: 4px 0 0;
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: .04em;
}

.masthead__meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--ink-soft);
  padding-bottom: 3px;
}

.sync::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--label-green);
  margin-right: 7px;
  vertical-align: 1px;
}

.sync--stale::before { background: var(--amber); }
.sync--error::before { background: var(--vermillion); }

.today {
  font-variant-numeric: tabular-nums;
  letter-spacing: .05em;
}

/* ---------- 盤面 ---------- */

.board {
  flex: 1 1 auto;
  display: grid;
  grid-template-columns: repeat(3, minmax(280px, 1fr));
  gap: 22px;
  padding: 22px 28px 32px;
  overflow-x: auto;
  align-items: stretch;
}

.column {
  display: flex;
  flex-direction: column;
  min-height: 220px;
  max-height: calc(100vh - 175px);
  background: rgba(255, 253, 247, .72);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .8) inset;
}

.column__head {
  flex: 0 0 auto;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 13px 15px 9px;
  border-bottom: 3px double var(--rule);
}

.column__name {
  font-family: "Shippori Mincho", "Hiragino Mincho ProN", serif;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .12em;
  text-indent: .12em;
}

.column__count {
  font-size: 11.5px;
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
  letter-spacing: .06em;
}

.column__list {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 12px 12px 4px;
  display: flex;
  flex-direction: column;
  gap: 9px;
  min-height: 60px;
}

.column--over .column__list { background: rgba(35, 64, 107, .045); }

.column__empty {
  color: var(--ink-faint);
  font-size: 12px;
  text-align: center;
  padding: 18px 0;
  letter-spacing: .05em;
}

/* ---------- カード ---------- */

.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--label-gray);
  border-radius: var(--radius);
  padding: 10px 12px 9px;
  box-shadow: var(--shadow-card);
  cursor: grab;
  transition: box-shadow .14s ease, transform .14s ease, border-color .14s ease;
}

.card:hover {
  box-shadow: 0 1px 0 rgba(29, 26, 21, .06), 0 4px 11px rgba(29, 26, 21, .12);
  transform: translateY(-1px);
}

.card:focus-visible {
  outline: 2px solid var(--indigo);
  outline-offset: 2px;
}

.card--dragging {
  opacity: .45;
  cursor: grabbing;
}

.card--label-red { border-left-color: var(--label-red); }
.card--label-yellow { border-left-color: var(--label-yellow); }
.card--label-green { border-left-color: var(--label-green); }
.card--label-blue { border-left-color: var(--label-blue); }
.card--label-gray { border-left-color: var(--label-gray); }

.card__title {
  font-size: 13.5px;
  line-height: 1.55;
  font-weight: 500;
  word-break: break-word;
}

.card__note {
  margin-top: 3px;
  font-size: 11.5px;
  color: var(--ink-faint);
  letter-spacing: .02em;
}

.card__foot {
  margin-top: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 11.5px;
  color: var(--ink-soft);
}

.card__assignee {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.card__assignee-chip {
  width: 19px;
  height: 19px;
  border-radius: 50%;
  background: var(--indigo);
  color: #f6f2e8;
  font-size: 10.5px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0;
}

.card__due {
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
}

.card__due--over { color: var(--vermillion); font-weight: 700; }
.card__due--today { color: var(--amber); font-weight: 700; }

/* 落下先の目印 */
.placeholder {
  height: 44px;
  border: 1px dashed var(--indigo);
  border-radius: var(--radius);
  background: rgba(35, 64, 107, .06);
}

/* ---------- カード追加 ---------- */

.adder {
  flex: 0 0 auto;
  padding: 8px 12px 12px;
}

.adder__button {
  width: 100%;
  text-align: left;
  background: none;
  border: 1px dashed var(--rule);
  border-radius: var(--radius);
  color: var(--ink-soft);
  font: inherit;
  font-size: 12.5px;
  padding: 8px 10px;
  cursor: pointer;
  transition: border-color .14s ease, color .14s ease, background .14s ease;
}

.adder__button:hover {
  border-color: var(--indigo);
  color: var(--indigo);
  background: rgba(35, 64, 107, .04);
}

.adder__form { display: flex; flex-direction: column; gap: 7px; }

.adder__input {
  font: inherit;
  font-size: 13px;
  padding: 8px 10px;
  border: 1px solid var(--indigo);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--ink);
  resize: vertical;
  min-height: 58px;
}

.adder__input:focus { outline: none; box-shadow: 0 0 0 3px rgba(35, 64, 107, .13); }

.adder__row { display: flex; align-items: center; gap: 8px; }

.adder__hint { font-size: 11px; color: var(--ink-faint); }

/* ---------- ボタン ---------- */

.button {
  font: inherit;
  font-size: 12.5px;
  letter-spacing: .04em;
  padding: 7px 15px;
  border-radius: var(--radius);
  border: 1px solid var(--rule);
  background: var(--card);
  color: var(--ink);
  cursor: pointer;
  transition: background .14s ease, border-color .14s ease, color .14s ease;
}

.button:hover { border-color: var(--ink-soft); }

.button--primary {
  background: var(--indigo);
  border-color: var(--indigo);
  color: #f6f2e8;
}
.button--primary:hover { background: var(--indigo-deep); border-color: var(--indigo-deep); }

.button--danger { color: var(--vermillion); border-color: rgba(181, 67, 44, .45); }
.button--danger:hover { background: rgba(181, 67, 44, .07); border-color: var(--vermillion); }

.button--quiet { background: none; color: var(--ink-soft); }

.button--small { padding: 4px 10px; font-size: 11.5px; }

.icon-button {
  font: inherit;
  font-size: 20px;
  line-height: 1;
  width: 30px;
  height: 30px;
  border: none;
  background: none;
  color: var(--ink-soft);
  cursor: pointer;
  border-radius: var(--radius);
}
.icon-button:hover { background: rgba(29, 26, 21, .07); color: var(--ink); }

/* ---------- 編集の小窓 ---------- */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(29, 26, 21, .42);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 50;
}

.modal {
  width: min(560px, 100%);
  max-height: 90vh;
  overflow-y: auto;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lift);
  animation: modal-in .16s ease-out;
}

@keyframes modal-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

.modal__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 16px 12px 20px;
  border-bottom: 1px solid var(--rule);
}

.modal__head h2 {
  margin: 0;
  font-family: "Shippori Mincho", "Hiragino Mincho ProN", serif;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .1em;
}

.modal__body { padding: 18px 20px 20px; display: flex; flex-direction: column; gap: 14px; }

.field { display: flex; flex-direction: column; gap: 5px; flex: 1 1 0; }

.field__label {
  font-size: 11.5px;
  color: var(--ink-soft);
  letter-spacing: .1em;
}

.field input[type="text"],
.field input[type="date"],
.field textarea,
.field select {
  font: inherit;
  font-size: 13px;
  padding: 8px 10px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--ink);
  width: 100%;
}

.field textarea { resize: vertical; line-height: 1.65; }

.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--indigo);
  box-shadow: 0 0 0 3px rgba(35, 64, 107, .13);
}

.field-row { display: flex; gap: 14px; }

.swatches { display: flex; gap: 8px; padding-top: 2px; }

.swatch {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid transparent;
  box-shadow: 0 0 0 1px var(--rule);
  cursor: pointer;
  padding: 0;
}

.swatch--on { border-color: var(--paper); box-shadow: 0 0 0 2px var(--ink); }

.modal__error {
  margin: 0;
  color: var(--vermillion);
  font-size: 12.5px;
  border-left: 3px solid var(--vermillion);
  padding-left: 10px;
}

.modal__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 4px;
  border-top: 1px solid var(--rule);
  margin-top: 2px;
  padding-top: 14px;
}

.modal__foot-right { display: flex; gap: 8px; }

.confirm {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--vermillion);
}

/* ---------- 通知 ---------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  transform: translate(-50%, 14px);
  background: var(--ink);
  color: var(--paper);
  font-size: 12.5px;
  letter-spacing: .04em;
  padding: 10px 18px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lift);
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
  z-index: 60;
}

.toast--on { opacity: 1; transform: translate(-50%, 0); }

.toast--error { background: var(--vermillion); }

@media (max-width: 900px) {
  .board { grid-template-columns: repeat(3, minmax(260px, 1fr)); }
  .masthead { flex-direction: column; align-items: flex-start; gap: 10px; }
}