:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #1f2430;
  --muted: #6b7280;
  --border: #e3e7ef;
  --item-bg: #eef2fa;
  --item-bg-hover: #e6ecf8;
  --item-border: #d6deee;
  --primary: #3b6ef6;
  --primary-dark: #2f59cc;
  --danger: #d94b4b;
  --accent: #f59e0b;
  --review: #7c5cd6;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 16px 48px;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.6;
}

.site-header {
  max-width: 1000px;
  margin: 0 auto;
  padding: 32px 4px 20px;
}

.site-header h1 {
  margin: 0;
  font-size: 26px;
}

.subtitle {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}

main {
  max-width: 1000px;
  margin: 0 auto;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 1px 3px rgba(20, 30, 60, 0.05);
}

/* ダッシュボード */
.dashboard {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: flex-start;
}

.stat-label {
  font-size: 13px;
  color: var(--muted);
}

.stat-value {
  font-size: 32px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.stat.accent .stat-value { color: var(--accent); }
.stat.done .stat-value { color: #1d7a41; }

/* ダッシュボード内の「最新の振り返り」 */
.latest-review {
  grid-column: 1 / -1;
  border-left: 4px solid var(--review);
}

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

.latest-review-body {
  margin: 6px 0 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 14px;
}

.latest-review-body.is-empty { color: var(--muted); }

.jump {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  color: var(--primary);
}

/* レイアウト */
.columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: start;
}

h2 {
  margin: 0 0 12px;
  font-size: 16px;
}

.list-heading {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.count {
  font-size: 13px;
  font-weight: 400;
  color: var(--muted);
}

/* フォーム */
.form {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form label {
  font-size: 13px;
  color: var(--muted);
}

input[type="text"],
textarea {
  width: 100%;
  padding: 9px 11px;
  font: inherit;
  color: inherit;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  resize: vertical;
}

input[type="text"]:focus,
textarea:focus {
  outline: 2px solid rgba(59, 110, 246, 0.35);
  border-color: var(--primary);
}

.btn {
  font: inherit;
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 9px 14px;
}

.btn.primary {
  margin-top: 10px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
}

.btn.primary:hover { background: var(--primary-dark); }

.btn.small {
  padding: 4px 10px;
  font-size: 12px;
  background: #fff;
  border-color: var(--border);
  color: var(--muted);
}

.btn.small:hover { border-color: var(--muted); color: var(--text); }
.btn.small.danger:hover { border-color: var(--danger); 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(--item-border);
  border-left: 4px solid var(--primary);
  border-radius: 10px;
  padding: 12px 14px;
  background: var(--item-bg);
  transition: background 0.15s ease, box-shadow 0.15s ease;
}

.item:hover {
  background: var(--item-bg-hover);
  box-shadow: 0 1px 5px rgba(20, 30, 60, 0.09);
}

/* 左帯の色で、メモ／タスク／振り返りを見分けられるようにする */
.item.task { border-left-color: var(--accent); }
.item.review { border-left-color: var(--review); }

.item-title {
  font-weight: 600;
  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;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
}

.item-actions {
  margin-left: auto;
  display: flex;
  gap: 6px;
}

.badge {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 999px;
  font-size: 12px;
  border: 1px solid var(--border);
}

.badge.done { background: #e7f6ec; border-color: #bfe3cb; color: #1d7a41; }
.badge.open { background: #fff4e0; border-color: #f2d9a8; color: #96650b; }
.badge.week { background: #f0ecfb; border-color: #d8cdf3; color: #5b3fb0; }

.item.is-done {
  background: #edf1ee;
  border-color: #d3ddd6;
  border-left-color: #8fb69f;
}
.item.is-done:hover { background: #e6ebe7; }
.item.is-done .item-title { text-decoration: line-through; color: var(--muted); }

.empty {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
}

/* 振り返りセクション */
.review-section { margin-top: 16px; }

.review-section select {
  padding: 9px 11px;
  font: inherit;
  color: inherit;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.hint {
  margin: 8px 0 0;
  font-size: 13px;
  color: #5b3fb0;
  background: #f4f1fc;
  border: 1px solid #ded4f5;
  border-radius: 8px;
  padding: 7px 10px;
}

.message {
  margin: 0 0 16px;
  padding: 10px 14px;
  border-radius: 8px;
  background: #fdecec;
  border: 1px solid #f5c6c6;
  color: #a12727;
  font-size: 14px;
}

.message.ok {
  background: #e9f3ff;
  border-color: #c3ddff;
  color: #24509e;
}

/* 幅が狭いときはカードを折り返す */
@media (max-width: 900px) {
  .dashboard { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .columns { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .dashboard { grid-template-columns: 1fr; }
}