/* ===== カラーとトークン ===== */
:root {
  --bg: #f6f7f9;
  --bg-tint: #eef1f6;
  --panel: #ffffff;
  --text: #1b2330;
  --muted: #6b7789;
  --faint: #9aa5b4;
  --border: #e6e9ef;
  --border-strong: #d6dbe4;
  --accent: #3b62c4;
  --accent-soft: #eaeffb;
  --success: #2f7d57;
  --success-soft: #e9f5ee;
  --warn: #9a6a14;
  --warn-soft: #fbf2e0;
  --danger: #bb4038;
  --shadow-sm: 0 1px 2px rgba(21, 30, 45, 0.05);
  --shadow-md: 0 6px 20px -8px rgba(21, 30, 45, 0.16);
  --radius: 14px;
  --radius-sm: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161d;
    --bg-tint: #161b24;
    --panel: #1a1f29;
    --text: #e7ebf1;
    --muted: #98a3b3;
    --faint: #6d7889;
    --border: #262d3a;
    --border-strong: #333c4c;
    --accent: #7ea0f0;
    --accent-soft: #1e2740;
    --success: #6fce9e;
    --success-soft: #17291f;
    --warn: #e0b566;
    --warn-soft: #2a2317;
    --danger: #e8837a;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px -10px rgba(0, 0, 0, 0.6);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1100px 460px at 50% -180px, var(--bg-tint), transparent 70%),
    var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic",
               "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.shell {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 24px 72px;
}

/* ===== ヘッダー ===== */
.site-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 22px;
}

.site-header h1 {
  margin: 0;
  font-size: 25px;
  font-weight: 700;
  letter-spacing: 0.015em;
}

.subtitle {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.today {
  margin: 0;
  color: var(--faint);
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* サーバーがない環境で、保存先がブラウザであることを示すバッジ */
.mode-note {
  margin: 0;
  font-size: 11.5px;
  font-weight: 600;
  white-space: nowrap;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 2px 10px;
}

.mode-note[hidden] { display: none; }

/* ===== ダッシュボード ===== */
.dashboard {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 26px;
}

.stat {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 16px 18px 18px;
  display: grid;
  grid-template-columns: auto auto 1fr;
  grid-template-areas:
    "label label label"
    "value unit  ."
    "bar   bar   bar";
  align-items: baseline;
  column-gap: 5px;
}

.stat-label {
  grid-area: label;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.stat-value {
  grid-area: value;
  font-size: 34px;
  font-weight: 650;
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  transition: color 0.2s ease;
}

.stat-unit {
  grid-area: unit;
  font-size: 12px;
  color: var(--faint);
}

.stat-accent {
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
  background:
    linear-gradient(180deg, var(--accent-soft), transparent 60%),
    var(--panel);
}

.stat-accent .stat-label,
.stat-accent .stat-value { color: var(--accent); }

/* 完了割合のバー */
.stat-bar {
  grid-area: bar;
  margin-top: 12px;
  height: 4px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  overflow: hidden;
}

.stat-bar span {
  display: block;
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: var(--accent);
  transition: width 0.35s ease;
}

/* 最新の振り返り（ダッシュボード内、横いっぱい） */
.latest {
  grid-column: 1 / -1;
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 14px 18px 15px;
}

.latest-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.latest-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.latest-week {
  font-size: 12px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.latest-text {
  margin: 5px 0 0;
  font-size: 14px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
  /* 長い振り返りは3行までにして、ダッシュボードの高さを保つ */
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
}

.latest-text.is-empty { color: var(--faint); }

/* ===== パネル ===== */
.columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: start;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 20px;
}

.panel-wide { margin-top: 18px; }

.panel-head {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 15px;
}

.panel-head h2 {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.count {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--muted);
  background: var(--bg-tint);
  border-radius: 999px;
  padding: 1px 9px;
  font-variant-numeric: tabular-nums;
}

/* ===== フォーム ===== */
.form {
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding-bottom: 18px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--border);
}

.form-inline { flex-direction: row; }
.form-inline input { flex: 1; min-width: 0; }

input[type="text"], textarea {
  font: inherit;
  width: 100%;
  padding: 10px 13px;
  color: inherit;
  background: var(--bg-tint);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  resize: vertical;
  transition: background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

input[type="text"]::placeholder,
textarea::placeholder { color: var(--faint); }

input[type="text"]:focus, textarea:focus {
  outline: none;
  background: var(--panel);
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}

button {
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  white-space: nowrap;
  transition: background 0.15s ease, color 0.15s ease,
              border-color 0.15s ease, transform 0.08s ease, box-shadow 0.15s ease;
}

button:active { transform: translateY(1px); }

button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.primary:hover {
  background: color-mix(in srgb, var(--accent) 88%, #000);
  box-shadow: var(--shadow-md);
}

.plus {
  margin-right: 4px;
  font-weight: 400;
  opacity: 0.9;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
}

/* ===== 週の切り替え ===== */
.week-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.week-btn {
  width: 30px;
  height: 30px;
  padding: 0;
  font-size: 16px;
  line-height: 1;
  color: var(--muted);
  background: var(--bg-tint);
  border-color: transparent;
  border-radius: 9px;
}

.week-btn:hover:not(:disabled) {
  color: var(--accent);
  background: var(--accent-soft);
}

.week-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.week-label {
  min-width: 190px;
  font-weight: 600;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.hint {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--faint);
  background: var(--bg-tint);
  border-radius: 999px;
  padding: 1px 9px;
}

.hint-saved { color: var(--success); background: var(--success-soft); }

.badge-week { color: var(--accent); background: var(--accent-soft); }

/* ===== 一覧 ===== */
.list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 4px;
  border-bottom: 1px solid var(--border);
  animation: appear 0.22s ease both;
}

.list .item:last-child { border-bottom: none; }

@keyframes appear {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: none; }
}

.item-main {
  flex: 1;
  min-width: 0;
}

.item-title {
  font-weight: 600;
  line-height: 1.5;
  word-break: break-word;
  transition: color 0.2s ease;
}

.item-body {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 14px;
  white-space: pre-wrap;
  word-break: break-word;
}

.item-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 7px;
  font-size: 11.5px;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
}

.badge {
  font-weight: 600;
  letter-spacing: 0.03em;
  border-radius: 999px;
  padding: 1px 9px;
}

.badge-done { color: var(--success); background: var(--success-soft); }
.badge-open { color: var(--warn); background: var(--warn-soft); }

.item.done .item-title {
  color: var(--faint);
  text-decoration: line-through;
  text-decoration-color: color-mix(in srgb, var(--faint) 60%, transparent);
}

/* ===== チェックボックス ===== */
.check {
  flex: none;
  appearance: none;
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  margin: 3px 0 0;
  border: 1.5px solid var(--border-strong);
  border-radius: 7px;
  background: var(--panel);
  cursor: pointer;
  display: grid;
  place-content: center;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.check:hover { border-color: var(--accent); }

.check::after {
  content: "";
  width: 10px;
  height: 6px;
  border-left: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(-45deg) scale(0.5);
  opacity: 0;
  transition: transform 0.15s ease, opacity 0.15s ease;
  margin-top: -2px;
}

.check:checked {
  background: var(--accent);
  border-color: var(--accent);
}

.check:checked::after { opacity: 1; transform: rotate(-45deg) scale(1); }

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

/* ===== 削除ボタン（2段階） ===== */
.icon-btn {
  flex: none;
  padding: 4px 11px;
  font-size: 12px;
  font-weight: 600;
  color: var(--faint);
  background: transparent;
  border-color: var(--border);
  opacity: 0.55;
  transition: opacity 0.15s ease, color 0.15s ease,
              background 0.15s ease, border-color 0.15s ease;
}

.item:hover .icon-btn,
.icon-btn:focus-visible,
.icon-btn.armed { opacity: 1; }

.icon-btn:hover {
  color: var(--danger);
  background: color-mix(in srgb, var(--danger) 9%, transparent);
}

.icon-btn.armed {
  color: #fff;
  background: var(--danger);
  border-color: var(--danger);
}

/* タッチ操作では常にはっきり表示する */
@media (hover: none) {
  .icon-btn { opacity: 1; }
}

.icon-btn.armed:hover { color: #fff; }

/* ===== その他 ===== */
.empty {
  margin: 18px 0 4px;
  padding: 18px;
  text-align: center;
  color: var(--faint);
  font-size: 13px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
}

.error {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 11px 14px;
  font-size: 13.5px;
  color: var(--danger);
  background: color-mix(in srgb, var(--danger) 9%, var(--panel));
  border: 1px solid color-mix(in srgb, var(--danger) 28%, transparent);
  border-radius: var(--radius-sm);
}

.error::before { content: "!"; font-weight: 700; }

/* display: flex は [hidden] より強いので、明示的に隠す */
.error[hidden] { display: none; }

/* ===== レスポンシブ ===== */
/* カード4枚が窮屈になる幅から、2列（2段）に折り返す */
@media (max-width: 900px) {
  .dashboard { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 820px) {
  .shell { padding: 28px 16px 56px; }
  .columns { grid-template-columns: 1fr; }
}

@media (max-width: 420px) {
  .dashboard { grid-template-columns: 1fr; }
  .site-header { flex-direction: column; align-items: flex-start; gap: 6px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}