:root {
  --bg: #f5f6fa;
  --bg-grad-a: #eef1f8;
  --bg-grad-b: #f8f5fb;
  --panel: #ffffff;
  --panel-elev: #ffffff;
  --border: #e7eaf0;
  --border-strong: #d5dae4;
  --text: #1c2330;
  --text-soft: #4a5464;
  --muted: #8892a2;
  --accent: #5b6cff;
  --accent-soft: #eef0ff;
  --accent-strong: #4453e0;
  --alert: #ef6a4e;
  --done: #22a06b;
  --done-soft: #e6f6ee;
  --memo: #8b5cf6;
  --memo-soft: #f3edff;
  --memo-strong: #6d3fd8;
  --task: #0ea5a5;
  --task-soft: #e0f7f5;
  --task-strong: #0a8383;
  --reflection: #ec4899;
  --reflection-soft: #fdeaf3;
  --reflection-strong: #be2f74;
  --shadow-sm: 0 1px 2px rgba(20, 25, 40, 0.04);
  --shadow-md: 0 4px 14px rgba(20, 25, 40, 0.06);
  --shadow-lg: 0 12px 32px rgba(20, 25, 40, 0.08);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10131b;
    --bg-grad-a: #141826;
    --bg-grad-b: #17131f;
    --panel: #191d29;
    --panel-elev: #1e2331;
    --border: #262c3b;
    --border-strong: #333a4d;
    --text: #e7ebf3;
    --text-soft: #b8c0cf;
    --muted: #7d8698;
    --accent: #7a8cff;
    --accent-soft: #232849;
    --accent-strong: #98a6ff;
    --alert: #ff8567;
    --done: #4bd095;
    --done-soft: #16321f;
    --memo: #a78bfa;
    --memo-soft: #241a3a;
    --memo-strong: #c4b0ff;
    --task: #2dd4bf;
    --task-soft: #0f2a2a;
    --task-strong: #5eead4;
    --reflection: #f472b6;
    --reflection-soft: #2a1524;
    --reflection-strong: #fb9dcb;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.55);
  }
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  padding: 32px 20px 64px;
  background:
    radial-gradient(1200px 600px at 10% -10%, var(--bg-grad-a), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, var(--bg-grad-b), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: "Inter", "Hiragino Sans", "Yu Gothic", "Meiryo", system-ui, -apple-system, sans-serif;
  font-feature-settings: "palt";
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

main { max-width: 1040px; margin: 0 auto; }

/* ヘッダー */
.page-header {
  max-width: 1040px;
  margin: 0 auto 28px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.page-header .logo {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), #8f7bff);
  color: #fff;
  font-weight: 700;
  box-shadow: var(--shadow-md);
}
.page-header h1 {
  margin: 0;
  font-size: 1.5rem;
  letter-spacing: 0.01em;
  font-weight: 700;
}
.page-header .subtitle {
  margin: 2px 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

/* ダッシュボード */
.dashboard {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 28px;
}

.stat {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 20px 22px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  overflow: hidden;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.stat::before {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: var(--accent);
  opacity: 0.85;
}
.stat-memo::before { background: var(--memo); }
.stat-task::before { background: var(--task); }
.stat-alert::before { background: var(--alert); }
.stat-done::before { background: var(--done); }
.stat-memo .stat-value { color: var(--memo-strong); }
.stat-task .stat-value { color: var(--task-strong); }
.stat:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }

.stat-label {
  display: block;
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.stat-value {
  display: block;
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}
.stat-alert .stat-value { color: var(--alert); }
.stat-done .stat-value { color: var(--done); }

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

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-sm);
}

.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 14px;
}
.panel h2 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.panel-count {
  font-size: 0.75rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

/* フォーム — 両パネルで高さを揃えるため min-height を設定 */
.form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 18px;
  min-height: 214px;
}
.form-inline { flex-direction: row; align-items: flex-start; }
.form-inline input { flex: 1; }

/* タスク入力は縦方向に引き伸ばしてメモ側とボタン位置を揃える */
#task-form { justify-content: space-between; }
#task-form #task-title { flex: 1; }

/* パネル別カラー */
.panel-memo { border-top: 3px solid var(--memo); }
.panel-task { border-top: 3px solid var(--task); }
.panel-memo h2 { color: var(--memo-strong); }
.panel-task h2 { color: var(--task-strong); }
.panel-memo input:focus, .panel-memo textarea:focus {
  border-color: var(--memo);
  box-shadow: 0 0 0 3px var(--memo-soft);
}
.panel-task input:focus, .panel-task textarea:focus {
  border-color: var(--task);
  box-shadow: 0 0 0 3px var(--task-soft);
}
.panel-memo button[type="submit"] { background: var(--memo); }
.panel-memo button[type="submit"]:hover { background: var(--memo-strong); }
.panel-task button[type="submit"] { background: var(--task); }
.panel-task button[type="submit"]:hover { background: var(--task-strong); }
.panel-memo .panel-count { color: var(--memo); }
.panel-task .panel-count { color: var(--task); }

.panel-reflection { border-top: 3px solid var(--reflection); }
.panel-reflection h2 { color: var(--reflection-strong); }
.panel-reflection input:focus, .panel-reflection textarea:focus {
  border-color: var(--reflection);
  box-shadow: 0 0 0 3px var(--reflection-soft);
}
.panel-reflection button[type="submit"] { background: var(--reflection); }
.panel-reflection button[type="submit"]:hover { background: var(--reflection-strong); }
.panel-reflection .panel-count { color: var(--reflection); }
.panel-reflection #reflection-list li { border-left: 3px solid var(--reflection); }

/* 週次振り返りフォームの高さは自然に */
#reflection-form { min-height: 0; }

.field-label {
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: -4px;
}

.reflection-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}
.reflection-week {
  font-weight: 700;
  color: var(--reflection-strong);
  letter-spacing: 0.01em;
  font-variant-numeric: tabular-nums;
}

/* 最新の振り返り（ダッシュボード） */
.latest-reflection {
  max-width: 1040px;
  margin: 0 auto 28px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--reflection);
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.latest-reflection-head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.latest-reflection-label {
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--reflection-soft);
  color: var(--reflection-strong);
  font-weight: 600;
}
.latest-reflection-week {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.latest-reflection-body {
  margin: 2px 0 0;
  color: var(--text-soft);
  white-space: pre-wrap;
  word-break: break-word;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.latest-reflection:not(.has-data) .latest-reflection-body { color: var(--muted); }

input, textarea {
  font: inherit;
  padding: 10px 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--panel-elev);
  color: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
input::placeholder, textarea::placeholder { color: var(--muted); }
input:hover, textarea:hover { border-color: var(--muted); }
input:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
textarea { resize: vertical; min-height: 76px; }

button {
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
  transition: transform 0.05s ease, background 0.15s ease, box-shadow 0.15s ease;
}
button:hover { background: var(--accent-strong); box-shadow: var(--shadow-md); }
button:active { transform: translateY(1px); }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* 一覧 */
.list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }

.list li {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  background: var(--panel-elev);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}
.list li:hover { border-color: var(--border-strong); box-shadow: var(--shadow-sm); }

/* 一覧アイテムの高さを揃えて視認性を上げる */
#memo-list li,
#task-list li {
  min-height: 88px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 12px 14px 12px 12px;
}
#memo-list li { border-left: 3px solid var(--memo); }
#task-list li { border-left: 3px solid var(--task); }
#memo-list li.memo-done { border-left-color: var(--done); background: color-mix(in srgb, var(--done-soft) 45%, var(--panel-elev)); }
#task-list li.task-done { border-left-color: var(--done); background: color-mix(in srgb, var(--done-soft) 45%, var(--panel-elev)); }

.item-title { font-weight: 600; word-break: break-word; letter-spacing: 0.01em; }
.item-body {
  margin: 6px 0 0;
  color: var(--text-soft);
  white-space: pre-wrap;
  word-break: break-word;
}
.item-meta {
  margin-top: 8px;
  font-size: 0.72rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

/* メモ / タスク行 */
.memo-row, .task-row { display: flex; align-items: center; gap: 12px; }
.memo-row .memo-title-box { flex: 1; min-width: 0; }
.memo-row .item-title, .task-row .item-title {
  display: flex; align-items: center; gap: 8px;
}
.task-row .item-title { flex: 1; }

.memo-icon, .task-icon {
  width: 18px; height: 18px;
  flex-shrink: 0;
  display: inline-grid;
  place-items: center;
}
.memo-icon { color: var(--memo); }
.task-icon { color: var(--task); }
.memo-done .memo-icon,
.task-done .task-icon { color: var(--done); }

.memo-row input[type="checkbox"],
.task-row input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 22px; height: 22px;
  padding: 0;
  border: 1.5px solid var(--border-strong);
  border-radius: 6px;
  background: var(--panel-elev);
  cursor: pointer;
  display: grid; place-items: center;
  transition: background 0.15s ease, border-color 0.15s ease;
  flex-shrink: 0;
  box-shadow: none;
}
.memo-row input[type="checkbox"]:hover { border-color: var(--memo); }
.task-row input[type="checkbox"]:hover { border-color: var(--task); }
.memo-row input[type="checkbox"]:checked,
.task-row input[type="checkbox"]:checked {
  background: var(--done);
  border-color: var(--done);
}
.memo-row input[type="checkbox"]::after,
.task-row input[type="checkbox"]::after {
  content: "";
  width: 12px;
  height: 12px;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path fill='none' stroke='%23ffffff' stroke-width='2.6' stroke-linecap='round' stroke-linejoin='round' d='M3 8.5l3.2 3.2L13 5'/></svg>");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 12px 12px;
  opacity: 0;
  transition: opacity 0.12s ease;
}
.memo-row input[type="checkbox"]:checked::after,
.task-row input[type="checkbox"]:checked::after { opacity: 1; }

.memo-done .item-title { text-decoration: line-through; color: var(--muted); }

.task-done { background: transparent; }
.task-done .item-title { text-decoration: line-through; color: var(--muted); }

.badge {
  font-size: 0.68rem;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.badge-done { background: var(--done-soft); color: var(--done); }

.btn-delete {
  background: transparent;
  color: var(--muted);
  padding: 6px 10px;
  font-size: 0.78rem;
  font-weight: 500;
  border-radius: 6px;
  box-shadow: none;
}
.btn-delete:hover { color: var(--alert); background: transparent; box-shadow: none; }

.empty {
  color: var(--muted);
  font-size: 0.9rem;
  padding: 20px 8px;
  text-align: center;
  border: 1px dashed var(--border-strong);
  background: transparent;
}
.empty:hover { border-color: var(--border-strong); box-shadow: none; }

/* メッセージ */
.message {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%, 10px);
  margin: 0;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--text);
  color: var(--panel);
  font-size: 0.85rem;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
}
.message.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 760px) {
  body { padding: 20px 14px 48px; }
  .dashboard { grid-template-columns: 1fr; }
  .columns { grid-template-columns: 1fr; }
  .stat-value { font-size: 1.7rem; }
}