/* 暗記マーカー アプリ本体 - iOS safe-area / dynamic viewport 完全対応 */
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
:root {
  --bg: #0f172a;
  --bg-2: #1e293b;
  --fg: #f1f5f9;
  --muted: #94a3b8;
  --accent: #fbbf24;
  --accent-2: #f59e0b;
  --card: #1e293b;
  --border: #334155;
  --danger: #ef4444;
  --good: #10b981;
  --link: #60a5fa;
  --header-h: 52px;
  /* 4方向の safe-area */
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bot: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}
[data-theme="light"] {
  --bg: #f8fafc;
  --bg-2: #ffffff;
  --fg: #0f172a;
  --muted: #475569;
  --card: #ffffff;
  --border: #e2e8f0;
  --link: #2563eb;
}

/* iOS Safari は font-size < 16px の input/textarea/select を focus すると
 * 強制的にズームしてしまうので、フォーム要素はすべて 16px 以上を強制する */
input, textarea, select { font-size: 16px; }

/* ====== ルート: 動的ビューポート高さで iOS の URL バー伸縮に追従 ====== */
html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  /* フォールバック → モダン */
  height: 100vh;
  height: 100svh;   /* small viewport: アドレスバー表示時を基準 */
  height: 100dvh;   /* dynamic: 動的に追従 */
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-text-size-adjust: 100%;
  background: var(--bg);
  color: var(--fg);
}
body {
  position: relative;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN",
               "Hiragino Sans", "Yu Gothic UI", "Meiryo", system-ui, sans-serif;
  user-select: none; -webkit-user-select: none;
  -webkit-touch-callout: none;
}

/* ====== Views ====== */
.view {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  min-height: 0;        /* flex 子の溢れを防ぐ */
  min-width: 0;
  overflow: hidden;
  /* iOS でビュー全体が横スクロールしないように */
  overflow-x: hidden;
}
.view.active { display: flex; }

/* エディタ画面のみ DOM 順を視覚順に再配置 (quiz-bar をツールバー直前へ) */
#view-editor .canvas-wrap { order: 3; }
#view-editor .page-nav     { order: 2; }
#view-editor .quiz-bar     { order: 4; }
#view-editor .toolbar      { order: 5; }
#view-editor .topbar       { order: 1; }
/* sheet 系は position: fixed なので order 影響なし */

/* ====== Topbar ====== */
.topbar {
  flex-shrink: 0;
  display: flex; align-items: center; gap: .35rem;
  /* 上はノッチ分、左右はランドスケープ時のノッチ分 */
  padding-top: var(--safe-top);
  padding-left: max(.5rem, var(--safe-left));
  padding-right: max(.5rem, var(--safe-right));
  min-height: calc(var(--header-h) + var(--safe-top));
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
}
.topbar h1 {
  font-size: 1.05rem; margin: 0; flex: 1;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.topbar-actions {
  display: flex; gap: .15rem; flex-shrink: 0;
}
.title-ellipsis {
  flex: 1; min-width: 0; padding: 0 .35rem;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  font-weight: 600;
}
.icon-btn {
  background: transparent; border: 0; color: var(--fg);
  width: 38px; height: 38px; border-radius: 10px;
  font-size: 1.05rem; cursor: pointer;
  flex-shrink: 0;
  display: inline-flex; align-items: center; justify-content: center;
}
.icon-btn:hover { background: rgba(255,255,255,.08); }
[data-theme="light"] .icon-btn:hover { background: rgba(0,0,0,.06); }
.icon-btn:active { transform: scale(.94); }

/* ====== ライブラリ ====== */
.search-bar {
  flex-shrink: 0;
  display: flex; gap: .35rem;
  padding: .5rem max(.75rem, var(--safe-right)) .5rem max(.75rem, var(--safe-left));
  border-bottom: 1px solid var(--border); background: var(--bg-2);
}
.search-bar input, .search-bar select {
  flex: 1; min-width: 0;
  padding: .55rem .7rem;
  /* iOS は font-size < 16px の input を focus すると自動でズームしてしまうため
     必ず 16px 以上にする */
  font-size: 16px;
  background: var(--bg); color: var(--fg);
  border: 1px solid var(--border); border-radius: 8px;
}
.library-grid {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding:
    .75rem
    max(.75rem, var(--safe-right))
    /* 下: home-indicator + FAB を避ける余白 */
    calc(.75rem + var(--safe-bot) + 88px)
    max(.75rem, var(--safe-left));
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: .75rem;
  align-content: start;
}
.lib-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  overflow: hidden; cursor: pointer; position: relative;
  transition: transform .1s ease;
}
.lib-card:active { transform: scale(.97); }
.lib-thumb {
  width: 100%; aspect-ratio: 4/3;
  background: #000 center/cover no-repeat;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--muted); font-size: 2rem;
}
.lib-meta { padding: .5rem .6rem; }
.lib-title {
  font-weight: 600; font-size: .92rem;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.lib-sub {
  font-size: .75rem; color: var(--muted);
  display: flex; gap: .35rem; flex-wrap: wrap; margin-top: .25rem;
}
.lib-tag {
  display: inline-block; background: var(--accent);
  color: #1f2937; padding: 1px 6px; border-radius: 999px;
  font-size: .7rem;
}
/* カードの削除ボタン (右上の ×) */
.lib-del {
  position: absolute; top: 6px; right: 6px;
  width: 30px; height: 30px; border-radius: 50%;
  background: rgba(0,0,0,.65); color: #fff;
  border: 0; cursor: pointer;
  font-size: 1.2rem; line-height: 1;
  display: flex; align-items: center; justify-content: center;
  z-index: 5;
  -webkit-tap-highlight-color: transparent;
  transition: transform .1s ease, background .1s ease;
}
.lib-del:hover { background: var(--danger); }
.lib-del:active { transform: scale(.9); background: var(--danger); }

/* カード下部の並び替えボタン (↑↓) */
.lib-meta { position: relative; padding-bottom: 38px; }
.lib-actions {
  position: absolute;
  right: 6px; bottom: 6px;
  display: flex; gap: 4px;
  z-index: 5;
}
.lib-actions button {
  width: 32px; height: 28px;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem; line-height: 1;
  display: flex; align-items: center; justify-content: center;
  -webkit-tap-highlight-color: transparent;
}
.lib-actions button:hover:not(:disabled) {
  background: var(--accent); color: #1f2937; border-color: var(--accent);
}
.lib-actions button:active:not(:disabled) { transform: scale(.92); }
.lib-actions button:disabled {
  opacity: .35;
  cursor: default;
}
/* 空状態ヒント: ライブラリ全体に重ねて中央配置 */
.empty-hint {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: var(--muted);
  line-height: 2;
  padding: 0 1rem;
  pointer-events: none;
  margin: 0;
  width: max-content;
  max-width: calc(100% - 2rem);
}
.empty-hint.hidden { display: none; }

/* FAB (右下、ノッチ・home-indicator 回避) */
.fab {
  position: fixed;
  right: max(16px, calc(16px + var(--safe-right)));
  bottom: max(16px, calc(16px + var(--safe-bot)));
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--accent); color: #1f2937;
  border: 0; font-size: 2rem; line-height: 1; cursor: pointer;
  box-shadow: 0 8px 16px rgba(0,0,0,.25);
  z-index: 50;
  display: flex; align-items: center; justify-content: center;
}
.fab:active { transform: scale(.95); }

/* ====== Sheet ====== */
.sheet {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(0,0,0,.5);
  display: flex; align-items: flex-end; justify-content: center;
  /* ノッチ・home-indicator を考慮 */
  padding: var(--safe-top) var(--safe-right) 0 var(--safe-left);
}
.sheet.hidden { display: none; }
.sheet-inner {
  background: var(--bg-2);
  width: 100%;
  max-width: 560px;
  max-height: calc(100dvh - var(--safe-top) - 1rem);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: 16px 16px 0 0;
  padding: 1rem 1rem calc(1rem + var(--safe-bot));
}
.sheet-inner h3 {
  margin: .25rem 0 .75rem; font-size: 1rem; color: var(--muted);
  text-align: center;
}
.sheet-btn {
  display: block; width: 100%; padding: .85rem 1rem;
  background: var(--card); color: var(--fg);
  border: 1px solid var(--border); border-radius: 10px;
  font-size: 1rem; cursor: pointer; text-align: left;
  margin-bottom: .35rem;
}
.sheet-btn:hover { background: rgba(255,255,255,.05); }
.sheet-btn.ghost { background: transparent; border-color: transparent; color: var(--muted); text-align: center; }
.sheet-btn.danger { color: var(--danger); }

/* ====== エディタ ====== */
/* canvas-wrap: stage を transform で配置するため flex centering は使わない
 * (flex centering と translate を併用すると tx/ty 計算がずれる)
 * 横向きノッチ部は黒背景のまま見え、コンテンツは tx/ty で中央寄せ */
.canvas-wrap {
  flex: 1;
  min-height: 0;
  position: relative;
  overflow: hidden;
  background: #000;
  touch-action: none;
}
[data-theme="light"] .canvas-wrap { background: #222; }
.canvas-stage {
  position: absolute;
  top: 0; left: 0;
  transform-origin: 0 0;
}
.canvas-stage canvas {
  position: absolute; top: 0; left: 0; display: block;
  pointer-events: none;
}
#canvas-base { z-index: 1; }
#canvas-marker { z-index: 2; }

/* ツールバー */
.toolbar {
  flex-shrink: 0;
  background: var(--bg-2); border-top: 1px solid var(--border);
  /* 4 方向 safe-area */
  padding:
    .4rem
    max(.5rem, var(--safe-right))
    calc(.4rem + var(--safe-bot))
    max(.5rem, var(--safe-left));
  display: flex; flex-direction: column; gap: .35rem;
}
.tool-row {
  display: flex; align-items: center; gap: .35rem;
  flex-wrap: wrap;
}
.tool-btn {
  background: var(--card); color: var(--fg);
  border: 1px solid var(--border); border-radius: 8px;
  padding: .4rem .55rem; font-size: 1rem; cursor: pointer;
  min-width: 40px; min-height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.tool-btn.active { background: var(--accent); color: #1f2937; border-color: var(--accent); }
.tool-btn.good { color: var(--good); }
.tool-btn.bad { color: var(--danger); }
.color-row {
  display: flex; gap: .3rem; flex: 1; flex-wrap: wrap; min-width: 0;
}
.color-swatch {
  width: 28px; height: 28px; border-radius: 50%;
  border: 2px solid var(--border); cursor: pointer;
  position: relative; flex-shrink: 0;
}
.color-swatch.active {
  border-color: var(--fg); box-shadow: 0 0 0 2px var(--accent);
}
/* サイズ調整 (range + 現在値表示) */
.size-control {
  display: flex; align-items: center; gap: .35rem;
  flex: 1; min-width: 100px;
}
#size-range {
  flex: 1; min-width: 80px;
}
#size-value {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: .85rem;
  color: var(--muted);
  min-width: 28px;
  text-align: right;
}

/* ページナビ */
.page-nav {
  flex-shrink: 0;
  display: flex; align-items: center; gap: .5rem; justify-content: center;
  padding: .25rem max(0px, var(--safe-right)) .25rem max(0px, var(--safe-left));
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
}
.page-nav.hidden { display: none; }
#page-label { font-size: .9rem; color: var(--muted); min-width: 60px; text-align: center; }

/* クイズバー: position: fixed をやめてツールバーの直上に flex 配置 */
.quiz-bar {
  flex-shrink: 0;
  background: var(--bg-2); border-top: 1px solid var(--border);
  display: flex; gap: .35rem;
  padding: .5rem max(.5rem, var(--safe-right)) .5rem max(.5rem, var(--safe-left));
  align-items: center; justify-content: center;
  flex-wrap: wrap;
}
.quiz-bar.hidden { display: none; }
#quiz-progress { font-weight: 700; min-width: 60px; text-align: center; }

/* ====== Stats / Tags ====== */
.stats-body {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding:
    1rem
    max(1rem, var(--safe-right))
    calc(1rem + var(--safe-bot))
    max(1rem, var(--safe-left));
}
.stats-summary {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: .5rem; margin-bottom: 1rem;
}
.stats-summary .stat-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 10px; padding: .8rem; text-align: center;
}
.stats-summary .num { font-size: 1.5rem; font-weight: 700; color: var(--accent); }
.stats-summary .lbl { font-size: .8rem; color: var(--muted); }
.stats-list { display: flex; flex-direction: column; gap: .35rem; }
.stat-row {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 8px; padding: .6rem .75rem;
  display: flex; justify-content: space-between; align-items: center;
  gap: .5rem;
}

.tag-add-row {
  display: flex; gap: .35rem; margin-bottom: 1rem;
}
.tag-add-row input {
  flex: 1; min-width: 0;
  padding: .55rem; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg); color: var(--fg);
  /* iOS の自動ズーム回避 */
  font-size: 16px;
}
.tag-add-row button {
  padding: .55rem 1rem; border-radius: 8px;
  background: var(--accent); color: #1f2937; border: 0; font-weight: 700;
  cursor: pointer; flex-shrink: 0;
}
.tag-list { display: flex; gap: .35rem; flex-wrap: wrap; }
.tag-chip {
  background: var(--card); border: 1px solid var(--border); border-radius: 999px;
  padding: .35rem .8rem; font-size: .85rem; display: flex; align-items: center; gap: .35rem;
}
.tag-chip button {
  background: transparent; color: var(--danger); border: 0; cursor: pointer;
}

/* ====== Toast / Loading ====== */
.toast {
  position: fixed;
  left: 50%;
  bottom: max(96px, calc(96px + var(--safe-bot)));
  transform: translateX(-50%);
  max-width: calc(100% - 2rem);
  background: rgba(0,0,0,.85); color: #fff; padding: .6rem 1rem;
  border-radius: 8px; z-index: 200; pointer-events: none;
  font-size: .9rem; text-align: center;
}
.toast.hidden { display: none; }
.loading {
  position: fixed; inset: 0; z-index: 300;
  background: rgba(0,0,0,.6); display: flex;
  flex-direction: column; align-items: center; justify-content: center;
  color: #fff; gap: 1rem;
  padding: var(--safe-top) var(--safe-right) var(--safe-bot) var(--safe-left);
}
.loading.hidden { display: none; }
.spinner {
  width: 48px; height: 48px; border-radius: 50%;
  border: 4px solid rgba(255,255,255,.2); border-top-color: var(--accent);
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.hidden { display: none !important; }

/* ====== レスポンシブ (横向き / 小さい画面) ====== */
@media (orientation: landscape) and (max-height: 500px) {
  :root { --header-h: 42px; }
  .topbar h1 { font-size: .95rem; }
  .toolbar {
    padding:
      .25rem
      max(.35rem, var(--safe-right))
      calc(.25rem + var(--safe-bot))
      max(.35rem, var(--safe-left));
    gap: .25rem;
  }
  .tool-btn { padding: .25rem .45rem; min-height: 32px; min-width: 36px; }
  .color-swatch { width: 24px; height: 24px; }
  .icon-btn { width: 34px; height: 34px; font-size: 1rem; }
  .library-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: .5rem;
  }
}

/* 360px 以下の極端に細い画面でツールバーが詰まる場合 */
@media (max-width: 360px) {
  .tool-btn { min-width: 36px; padding: .35rem .4rem; font-size: .9rem; }
  .icon-btn { width: 36px; height: 36px; }
  .color-swatch { width: 26px; height: 26px; }
}