:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --line: #e5e7eb;
  --text: #1f2937;
  --sub: #6b7280;
  --muted: #b8bec7;
  --track: #e8eaee;
  --cell: #eceef1;
  --accent: #4b3a8a;
  --accent-weak: #ece9f7;
  --today: #d9531e;
  --hc: var(--accent);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-top: env(safe-area-inset-top, 0px);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111418;
    --card: #1b1f24;
    --line: #2c333b;
    --text: #e5e7eb;
    --sub: #9aa4b2;
    --muted: #4a525c;
    --track: #2c333b;
    --cell: #262b31;
    --accent: #9b8ae0;
    --accent-weak: #241f38;
    --today: #ff8a5c;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  -webkit-tap-highlight-color: transparent;
}
body.no-scroll { overflow: hidden; }
button { font: inherit; color: inherit; }

.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: calc(12px + var(--safe-top)) 16px 10px;
  background: #4b3a8a; color: #fff;
}
.topbar h1 { font-size: 19px; margin: 0; font-weight: 700; }
.topbar-right { display: flex; align-items: center; gap: 8px; }
.updated-at { font-size: 11px; opacity: .85; }
.icon-btn {
  border: none; background: none; font-size: 18px; line-height: 1; padding: 6px;
  cursor: pointer; color: inherit;
}
.icon-btn:active { opacity: .5; }

main { padding: 0 0 calc(24px + var(--safe-bottom)); max-width: 720px; margin: 0 auto; }

.setup-hint {
  margin: 12px 16px 0; font-size: 12px; color: var(--sub); text-align: center;
  padding: 10px; border: 1px dashed var(--line); border-radius: 10px; cursor: pointer;
}

/* ---- 一覧（Loop の習慣リスト） ---- */

.habit-list { background: var(--card); margin-top: 12px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.loading, .empty-note { padding: 24px; text-align: center; color: var(--sub); font-size: 14px; }

.hl-row {
  display: flex; align-items: stretch; min-height: 56px;
  border-bottom: 1px solid var(--line);
}
.hl-row:last-child { border-bottom: none; }
.hl-head { min-height: 40px; position: sticky; top: calc(50px + var(--safe-top)); z-index: 5; background: var(--card); }

.hl-name {
  flex: 1; min-width: 0;
  display: flex; align-items: center; gap: 12px;
  padding: 0 8px 0 16px;
  border: none; background: none; text-align: left; cursor: pointer;
}
.hl-name:active { background: var(--cell); }
.hl-label {
  font-size: 15px; font-weight: 600; color: var(--text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.ring { flex: none; }

.hl-days { display: flex; flex: none; padding-right: 8px; }
.hl-day-head {
  width: 40px; display: flex; flex-direction: column; align-items: center; justify-content: center;
  font-size: 10px; color: var(--sub); line-height: 1.25;
}
.hl-day-head b { font-size: 12px; color: var(--text); }
.hl-day-head.sun span { color: #d9443b; }
.hl-day-head.sat span { color: #3b73d9; }
.hl-day-head.is-today b { color: var(--today); }

.hl-check {
  width: 40px; border: none; background: none; cursor: pointer;
  font-size: 18px; color: var(--muted); padding: 0;
  display: flex; align-items: center; justify-content: center;
}
.hl-check.done { color: var(--hc); font-size: 22px; font-weight: 800; }
.hl-check.queued { opacity: .5; }
.hl-check:active { transform: scale(.85); }

/* ---- 詳細画面 ---- */

.detail-screen {
  position: fixed; inset: 0; z-index: 30;
  display: flex; flex-direction: column;
  background: var(--bg);
  animation: slide-in .18s ease-out;
}
@keyframes slide-in { from { transform: translateX(24px); opacity: 0; } to { transform: none; opacity: 1; } }
.detail-bar {
  display: flex; align-items: center; gap: 4px;
  padding: calc(8px + var(--safe-top)) 8px 8px;
  background: var(--hc); color: #fff;
}
.detail-bar h2 { font-size: 18px; margin: 0; font-weight: 700; }
.back-btn { font-size: 22px; padding: 6px 10px; }
.detail-body {
  flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch;
  padding: 12px 16px calc(24px + var(--safe-bottom));
}
.detail-body > * { max-width: 600px; margin-left: auto; margin-right: auto; }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 12px 14px 14px; margin-bottom: 12px;
}
.card-title {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 13px; margin: 0 0 10px; color: var(--hc); font-weight: 700;
}
.card-note { font-size: 11px; color: var(--sub); margin: 8px 0 0; line-height: 1.5; }
.detail-note { font-size: 11px; color: var(--sub); text-align: center; }

.overview { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.ov-ring { position: relative; width: 64px; height: 64px; flex: none; }
.ov-ring .ring { position: absolute; inset: 0; }
.ov-score {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 700; font-variant-numeric: tabular-nums;
}
.ov-stat { display: flex; flex-direction: column; align-items: center; gap: 2px; min-width: 0; }
.ov-stat b { font-size: 16px; font-variant-numeric: tabular-nums; }
.ov-stat span { font-size: 10px; color: var(--sub); white-space: nowrap; }

.seg { display: flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.seg-btn {
  border: none; background: var(--card); padding: 3px 12px; font-size: 12px; cursor: pointer; color: var(--sub);
}
.seg-btn.active { background: var(--hc); color: #fff; font-weight: 700; }

/* チャート共通: 線・棒は習慣の色、軸・グリッドは控えめに */
.chart { display: block; overflow: visible; touch-action: pan-y; }
.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .axis { fill: var(--sub); font-size: 10px; }
.chart .value { fill: var(--text); font-size: 10px; font-weight: 600; }
.chart .line { fill: none; stroke: var(--hc); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart .bar { fill: var(--hc); }
.chart .hit { fill: transparent; cursor: crosshair; }
.chart .crosshair { stroke: var(--sub); stroke-width: 1; stroke-dasharray: 3 3; }
.chart .cross-dot { fill: var(--hc); stroke: var(--card); stroke-width: 2; }
.chart .hidden { display: none; }
.chart .freq-dot { fill: var(--hc); }
.chart .freq-zero { fill: var(--muted); }

.cal-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; padding-bottom: 2px; }
.cal-grid { display: flex; gap: 3px; width: max-content; }
.cal-col { display: flex; flex-direction: column; gap: 3px; }
.cal-labels { position: sticky; left: 0; background: var(--card); z-index: 1; padding-right: 3px; }
.cal-month { height: 14px; font-size: 10px; color: var(--sub); white-space: nowrap; }
.cal-wd { width: 14px; height: 18px; font-size: 10px; color: var(--sub); line-height: 18px; }
.cal-cell {
  width: 18px; height: 18px; border-radius: 4px; border: none; padding: 0;
  background: var(--cell); cursor: pointer;
}
.cal-cell.done { background: var(--hc); }
.cal-cell.queued { opacity: .5; }
.cal-cell.today { box-shadow: 0 0 0 2px var(--today) inset; }
.cal-cell.out { background: transparent; cursor: default; }

.streak { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.streak-date { font-size: 11px; color: var(--sub); width: 36px; font-variant-numeric: tabular-nums; }
.streak-date:last-child { text-align: right; }
.streak-track { flex: 1; display: flex; justify-content: center; }
.streak-bar {
  height: 22px; border-radius: 4px; background: var(--hc);
  display: flex; align-items: center; justify-content: center; min-width: 40px;
}
.streak-bar span { font-size: 11px; font-weight: 700; color: #fff; }

.tooltip {
  position: fixed; z-index: 70; pointer-events: none;
  background: var(--text); color: var(--bg);
  padding: 6px 10px; border-radius: 8px; font-size: 12px; line-height: 1.4; text-align: center;
  box-shadow: 0 4px 12px rgba(0,0,0,.2);
}

/* ---- 設定 ---- */

.modal {
  position: fixed; inset: 0; background: rgba(0,0,0,.4);
  display: flex; align-items: flex-end; justify-content: center; z-index: 50;
}
.modal-card {
  background: var(--card); color: var(--text); width: 100%; max-width: 480px;
  border-radius: 16px 16px 0 0; padding: 18px 18px calc(18px + var(--safe-bottom));
}
.modal-card h2 { font-size: 16px; margin: 0 0 8px; }
.modal-note { font-size: 12px; color: var(--sub); line-height: 1.6; margin: 0 0 14px; }
.modal-note code { background: var(--accent-weak); padding: 1px 4px; border-radius: 4px; }
.modal-card label { display: block; font-size: 12px; color: var(--sub); margin-bottom: 12px; }
.modal-card input[type="url"], .modal-card input[type="text"] {
  display: block; width: 100%; margin-top: 4px; padding: 9px 10px;
  border: 1px solid var(--line); border-radius: 8px; background: var(--bg);
  color: var(--text); font-size: 14px;
}
.modal-card .check-label { display: flex; align-items: center; gap: 8px; color: var(--text); font-size: 13px; }
.modal-card { max-height: 92vh; overflow-y: auto; }
.modal-sub { font-size: 14px; margin: 18px 0 8px; padding-top: 14px; border-top: 1px solid var(--line); }
.manage-list { margin-bottom: 10px; }
.manage-row {
  display: flex; align-items: center; gap: 8px; padding: 7px 0 7px 10px;
  border-left: 4px solid var(--hc); border-bottom: 1px solid var(--line);
}
.manage-name { font-size: 14px; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.manage-meta { font-size: 11px; color: var(--sub); white-space: nowrap; }
.manage-del {
  border: 1px solid var(--line); background: var(--card); border-radius: 6px;
  font-size: 12px; padding: 4px 10px; cursor: pointer; color: #d9443b;
}
.manage-add { display: grid; grid-template-columns: 1fr auto; gap: 8px; margin-bottom: 8px; }
.manage-add input, .manage-add select {
  padding: 9px 10px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); color: var(--text); font-size: 14px; min-width: 0;
}
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 6px; }
.btn-primary, .btn-secondary {
  padding: 9px 16px; border-radius: 8px; font-size: 13px; cursor: pointer; border: 1px solid var(--line);
}
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); font-weight: 700; }
.btn-secondary { background: var(--card); color: var(--text); }

.toast {
  position: fixed; left: 50%; bottom: calc(20px + var(--safe-bottom));
  transform: translateX(-50%); background: var(--text); color: var(--bg);
  padding: 10px 8px 10px 16px; border-radius: 10px; font-size: 13px; z-index: 60;
  display: flex; align-items: center; gap: 8px; width: max-content; max-width: calc(100% - 32px);
  opacity: 0; transition: opacity .2s; pointer-events: none;
}
.toast.show { opacity: .96; pointer-events: auto; }
.toast span { padding-right: 8px; }
.toast-action {
  border: none; background: none; color: #b9a8ff; font-weight: 700; font-size: 13px;
  padding: 4px 8px; cursor: pointer; white-space: nowrap;
}
@media (prefers-color-scheme: dark) { .toast-action { color: #4b3a8a; } }

.about { font-size: 12px; color: var(--sub); line-height: 1.7; padding: 14px 16px 0; }
.about a { color: var(--accent); }

.hidden { display: none !important; }