:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e3e8f0;
  --primary: #3b6fd4;
  --primary-dark: #2f59aa;
  --accent: #e8582f;
  --success: #1f7a4d;
  --done: #9aa3b2;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 16px 48px;
  font-family: "Segoe UI", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.site-header {
  max-width: 1000px;
  margin: 0 auto;
  padding: 28px 0 16px;
}
.site-header h1 { margin: 0; font-size: 1.7rem; }
.tagline { margin: 4px 0 0; color: var(--muted); font-size: .9rem; }

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

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(20, 30, 60, .05);
}
.card h2 {
  margin: 0 0 14px;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ダッシュボード */
.dashboard {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  margin-bottom: 0;
  padding: 16px 12px;
}
.stat-label { font-size: .82rem; color: var(--muted); }
.stat-value { font-size: 2rem; font-weight: 700; color: var(--primary); }
.stat-done .stat-value { color: var(--success); }

/* ダッシュボード：最新の振り返り */
.latest-review {
  border-left: 4px solid var(--primary);
}
.latest-review h2 { margin-bottom: 8px; }
.latest-review .item-body { margin: 0; }
.week-label {
  font-size: .8rem;
  font-weight: 600;
  color: var(--primary);
  background: #eef3fc;
  border-radius: 999px;
  padding: 1px 10px;
}

/* レイアウト */
.columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: start;
}

/* フォーム */
label {
  display: block;
  font-size: .82rem;
  color: var(--muted);
  margin-bottom: 4px;
}
input[type="text"], textarea, select {
  width: 100%;
  padding: 9px 11px;
  font: inherit;
  font-size: .95rem;
  color: var(--text);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 12px;
  resize: vertical;
}
select { cursor: pointer; }
input[type="text"]:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 111, 212, .15);
}

.btn {
  font: inherit;
  font-size: .9rem;
  padding: 8px 16px;
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-small {
  font-size: .78rem;
  padding: 4px 10px;
  background: #fff;
  border-color: var(--border);
  color: var(--muted);
}
.btn-small:hover { border-color: var(--accent); color: var(--accent); }

.form-footer {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.hint { font-size: .8rem; color: var(--muted); }

/* 一覧 */
.list { list-style: none; margin: 0; padding: 0; }
.list li {
  border-top: 1px solid var(--border);
  padding: 12px 2px;
}
.list li:first-child { border-top: none; padding-top: 0; }

.item-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}
.item-title { font-weight: 600; word-break: break-word; }
.item-body {
  margin: 4px 0 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: .92rem;
}
.item-meta {
  margin-top: 4px;
  font-size: .76rem;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.actions { display: flex; gap: 6px; flex-shrink: 0; }

/* タスク */
.task-row { display: flex; align-items: flex-start; gap: 10px; }
.task-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 3px;
  flex-shrink: 0;
  cursor: pointer;
  accent-color: var(--primary);
}
.task-body { flex: 1; min-width: 0; }
li.done .item-title {
  text-decoration: line-through;
  color: var(--done);
}

.badge {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 999px;
  font-size: .72rem;
  border: 1px solid var(--border);
}
.badge-open { color: var(--accent); border-color: #f6cbbc; background: #fdf1ec; }
.badge-done { color: #1f7a4d; border-color: #bfe3d0; background: #eef8f2; }

.count {
  font-size: .78rem;
  font-weight: 600;
  color: var(--muted);
  background: var(--bg);
  border-radius: 999px;
  padding: 1px 9px;
}

.empty { color: var(--muted); font-size: .88rem; margin: 4px 0 0; }

.message {
  background: #fdf1ec;
  border: 1px solid #f6cbbc;
  color: #a83a17;
  padding: 9px 14px;
  border-radius: 8px;
  margin: 0 0 16px;
  font-size: .9rem;
}

.site-footer {
  max-width: 1000px;
  margin: 24px auto 0;
  color: var(--muted);
  font-size: .8rem;
  text-align: center;
}

@media (max-width: 720px) {
  .columns { grid-template-columns: 1fr; }
  .dashboard { grid-template-columns: 1fr; }
  .stat { flex-direction: row; justify-content: space-between; }
  .card h2 { flex-wrap: wrap; }
}