:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --border: #e2e5ea;
  --text: #1d2129;
  --muted: #7c8598;
  --accent: #2f6fed;
  --accent-soft: #eaf0fe;
  --danger: #d8453c;
  --done: #38a169;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 16px 64px;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.6;
}

main, .site-header { max-width: 960px; margin: 0 auto; }

.site-header { padding: 32px 4px 20px; }
.site-header h1 { margin: 0; font-size: 26px; letter-spacing: .02em; }
.tagline { margin: 4px 0 0; color: var(--muted); font-size: 14px; }

/* ダッシュボード */
.dashboard {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}
.stat {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  align-items: baseline;
  gap: 6px;
  flex-wrap: wrap;
}
.stat-label { color: var(--muted); font-size: 13px; width: 100%; }
.stat-value { font-size: 30px; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat-unit { color: var(--muted); font-size: 13px; }
.stat-accent { background: var(--accent-soft); border-color: #cfdcfb; }
.stat-accent .stat-value { color: var(--accent); }
.stat-done { background: #eefaf0; border-color: #cbeacf; }
.stat-done .stat-value { color: var(--done); }

/* ダッシュボード内の「最新の振り返り」 */
.latest-review {
  grid-column: 1 / -1;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.latest-review-week { font-weight: 600; font-size: 14px; margin-top: 2px; }
.latest-review-comment {
  margin: 6px 0 0;
  font-size: 14px;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.latest-review-comment.is-empty { color: var(--muted); }

/* レイアウト */
.columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: start;
}
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}
.panel h2 { margin: 0 0 14px; font-size: 17px; }
.panel-wide { margin-top: 16px; }

/* フォーム */
.form { display: flex; flex-direction: column; gap: 8px; margin-bottom: 18px; }
.form-row { flex-direction: row; }
.form-row input { flex: 1; }

.field { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.field-label { font-size: 13px; color: var(--muted); }
.form-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.hint { font-size: 12px; color: var(--muted); }

input, select, textarea {
  font: inherit;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: inherit;
  resize: vertical;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }

button {
  font: inherit;
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 9px 14px;
  background: var(--accent);
  color: #fff;
  white-space: nowrap;
}
button:hover { filter: brightness(1.05); }
button.ghost {
  background: transparent;
  color: var(--muted);
  border-color: var(--border);
  padding: 4px 10px;
  font-size: 12px;
}
button.ghost:hover { color: var(--danger); border-color: var(--danger); }

/* 一覧 */
.list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.item {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
}
.item-head { display: flex; align-items: flex-start; gap: 10px; }
.item-title { font-weight: 600; flex: 1; word-break: break-word; }
.item-body { margin: 6px 0 0; white-space: pre-wrap; word-break: break-word; font-size: 14px; }
.item-meta { margin-top: 8px; color: var(--muted); font-size: 12px; display: flex; gap: 10px; flex-wrap: wrap; }

.task-check { width: 18px; height: 18px; margin-top: 3px; accent-color: var(--done); cursor: pointer; }
.item.done { background: #fafbfc; }
.item.done .item-title { text-decoration: line-through; color: var(--muted); }

.badge { border-radius: 999px; padding: 1px 8px; font-size: 11px; border: 1px solid var(--border); }
.badge.week { color: var(--muted); }
.badge.current { color: var(--accent); border-color: #cfdcfb; background: var(--accent-soft); }
.badge.open { color: var(--accent); border-color: #cfdcfb; background: var(--accent-soft); }
.badge.done { color: var(--done); border-color: #cbeacf; background: #eefaf0; }

.empty { color: var(--muted); font-size: 13px; margin: 4px 2px; }

/* トースト */
.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%, 12px);
  background: #1d2129;
  color: #fff;
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s, transform .18s;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 900px) {
  .dashboard { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .columns { grid-template-columns: 1fr; }
  .dashboard { grid-template-columns: 1fr; }
  .stat { align-items: center; }
  .stat-label { width: auto; flex: 1; }
}