:root {
  --panel: #ffffff;
  --border: #ffffff;
  --text: #2a1155;
  --muted: #7b5ea7;
  --accent: #7b2ff7;
  --pink: #ff2e93;
  --orange: #ff8a00;
  --cyan: #00d4ff;
  --lime: #24e07a;
  --danger: #ff2d55;
  --grad-main: linear-gradient(135deg, #7b2ff7 0%, #ff2e93 100%);
  --grad-hot: linear-gradient(135deg, #ff8a00 0%, #ff2e93 100%);
  --grad-cool: linear-gradient(135deg, #00d4ff 0%, #7b2ff7 100%);
  --grad-go: linear-gradient(135deg, #24e07a 0%, #00d4ff 100%);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 24px 16px 64px;
  color: var(--text);
  font-family: "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", Meiryo, sans-serif;
  line-height: 1.6;
  /* 画面全体を虹色グラデーションで塗る */
  background:
    radial-gradient(circle at 12% 8%, rgba(255, 138, 0, 0.55), transparent 45%),
    radial-gradient(circle at 88% 12%, rgba(0, 212, 255, 0.55), transparent 45%),
    radial-gradient(circle at 78% 92%, rgba(36, 224, 122, 0.5), transparent 45%),
    linear-gradient(135deg, #7b2ff7 0%, #ff2e93 55%, #ff8a00 100%);
  background-attachment: fixed;
  min-height: 100vh;
}

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

.page-header h1 {
  margin: 0 0 20px;
  font-size: 28px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: #fff;
  text-shadow: 0 2px 0 rgba(123, 47, 247, 0.6), 0 6px 22px rgba(0, 0, 0, 0.35);
}

/* ダッシュボード */
.dashboard {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 22px;
}

.stat {
  border-radius: 16px;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 2px;
  color: #fff;
  background: var(--grad-cool);
  box-shadow: 0 10px 26px rgba(41, 8, 92, 0.35);
  transform: translateZ(0);
  transition: transform 0.15s ease;
}

.stat:nth-child(2) { background: var(--grad-go); }
.stat-accent { background: var(--grad-hot); }
.stat:nth-child(4) { background: var(--grad-main); }

.stat:hover { transform: translateY(-3px); }

.stat-label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.92);
}

.stat-value {
  font-size: 38px;
  font-weight: 900;
  line-height: 1.1;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

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

.panel {
  background: rgba(255, 255, 255, 0.94);
  border-radius: 18px;
  padding: 18px;
  box-shadow: 0 14px 34px rgba(41, 8, 92, 0.3);
  border-top: 6px solid transparent;
  border-image: var(--grad-main) 1;
}

.panel h2 {
  margin: 0 0 14px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.05em;
  background: var(--grad-main);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* 振り返りパネルは2列ぶんの幅を使う */
.panel-wide { grid-column: 1 / -1; }

.week-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.week-nav button { padding: 8px 14px; font-size: 14px; }

.week-label {
  flex: 1;
  min-width: 200px;
  text-align: center;
  font-weight: 800;
  font-size: 16px;
  background: var(--grad-main);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.week-status { margin: 0 0 12px; font-size: 13px; font-weight: 600; color: var(--muted); }

.ghost-btn {
  background: transparent;
  color: var(--accent);
  box-shadow: none;
  border: 2px solid #e6d6ff;
  font-size: 13px;
  padding: 6px 12px;
}

.ghost-btn:hover {
  background: var(--grad-main);
  color: #fff;
  border-color: transparent;
}

/* 入力欄を1行目、追加ボタンを2行目に縦並びで置く */
.form { display: flex; flex-direction: column; gap: 10px; margin-bottom: 18px; }
.form input[type="text"], .form textarea { width: 100%; }

input[type="text"], textarea {
  font: inherit;
  padding: 10px 12px;
  border: 2px solid #e6d6ff;
  border-radius: 12px;
  background: #fdf9ff;
  color: inherit;
  resize: vertical;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input[type="text"]::placeholder, textarea::placeholder { color: #b79ede; }

input[type="text"]:focus, textarea:focus {
  outline: none;
  border-color: var(--pink);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(255, 46, 147, 0.18);
}

button {
  font: inherit;
  font-weight: 800;
  letter-spacing: 0.05em;
  cursor: pointer;
  border: none;
  border-radius: 12px;
  padding: 11px 16px;
  color: #fff;
  background: var(--grad-main);
  box-shadow: 0 6px 18px rgba(123, 47, 247, 0.45);
  transition: transform 0.12s ease, box-shadow 0.12s ease, filter 0.12s ease;
}

button:hover {
  filter: saturate(1.25) brightness(1.08);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(255, 46, 147, 0.5);
}

button:active { transform: translateY(0); }

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

.item {
  border: 2px solid #f0e4ff;
  border-left: 7px solid transparent;
  border-image: var(--grad-cool) 1;
  border-radius: 12px;
  padding: 12px 14px;
  background: #fff;
}

.item-title { font-weight: 800; word-break: break-word; }
.item-body { margin: 4px 0 0; white-space: pre-wrap; word-break: break-word; }
.item-meta { margin-top: 6px; font-size: 12px; font-weight: 600; color: var(--muted); }

.task-row { display: flex; align-items: flex-start; gap: 10px; }
.task-row input[type="checkbox"] {
  margin-top: 6px;
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--pink);
}
.task-main { flex: 1; min-width: 0; }

.item.done { background: #f7f1ff; border-image: var(--grad-go) 1; }
.item.done .item-title { text-decoration: line-through; color: var(--muted); }

.badge {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: #fff;
}

.badge.open { background: var(--grad-hot); }
.badge.done { background: var(--grad-go); }

.delete-btn {
  background: transparent;
  color: var(--muted);
  padding: 4px 10px;
  font-size: 13px;
  box-shadow: none;
}

.delete-btn:hover {
  background: var(--danger);
  color: #fff;
  box-shadow: 0 6px 16px rgba(255, 45, 85, 0.45);
}

.empty { color: var(--muted); font-size: 14px; font-weight: 600; padding: 8px 2px; }

.error {
  background: var(--grad-hot);
  color: #fff;
  font-weight: 700;
  border-radius: 12px;
  padding: 12px 14px;
  margin: 0 0 16px;
  box-shadow: 0 8px 20px rgba(255, 45, 85, 0.4);
}

/* 画面が狭いときはダッシュボードを2列に折り返す */
@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; }
}