/*
 * 漢字かがみ・逆さまアプリ
 * Prefix: km-  (WordPress テーマ競合防止)
 */

/* ===== 変数 ===== */
.km-root {
  --main:    #1e3a5f;
  --main-l:  #2d5a8f;
  --main-d:  #0f1e3a;
  --gold:    #d4af37;
  --gold-l:  #f4cf5f;
  --gold-d:  #a07d10;
  --bg:      #f4f6f9;
  --border:  #dde3ec;
  --text:    #2c3e50;
  --sidebar: 200px;
  --header:  52px;
  font-family: 'BIZ UDGothic', sans-serif;
  color: var(--text);
}

.km-hidden { display: none !important; }

/* ===== 共通ボタン ===== */
.km-root .km-btn {
  all: unset;
  display: inline-flex; align-items: center; justify-content: center; gap: 5px;
  width: 100%; box-sizing: border-box;
  border-radius: 10px; padding: 10px 14px;
  font-family: 'BIZ UDGothic', sans-serif; font-weight: 700; font-size: .88rem;
  cursor: pointer; transition: all .16s; text-align: center;
}
.km-root .km-btn:disabled { opacity: .4 !important; cursor: not-allowed !important; transform: none !important; }
.km-root .km-btn-primary { background: linear-gradient(135deg, var(--main-l), var(--main)); color: #fff !important; box-shadow: 0 3px 8px rgba(30,58,95,.3); }
.km-root .km-btn-primary:hover:not(:disabled) { filter: brightness(1.12); transform: translateY(-2px); }
.km-root .km-btn-gold { background: linear-gradient(135deg, var(--gold-l), var(--gold)); color: var(--main-d) !important; box-shadow: 0 3px 8px rgba(212,175,55,.35); font-size: 1rem; }
.km-root .km-btn-gold:hover:not(:disabled) { filter: brightness(1.08); transform: translateY(-2px); }
.km-root .km-btn-gray { background: #7f8c8d; color: #fff !important; }
.km-root .km-btn-gray:hover:not(:disabled) { background: #636e72; transform: translateY(-1px); }

/* モードボタン：アクティブ時はゴールド */
.km-root .km-mode-btn { opacity: .6; }
.km-root .km-mode-btn.km-active { opacity: 1; background: linear-gradient(135deg, var(--gold-l), var(--gold)); color: var(--main-d) !important; box-shadow: 0 3px 8px rgba(212,175,55,.35); }

/* =====================================================
   設定画面
   ===================================================== */
.km-root .km-setup {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--main-d);
  padding: 16px; z-index: 9990;
}
.km-root .km-setup-modal {
  background: #fff; border-radius: 20px;
  box-shadow: 0 16px 48px rgba(0,0,0,.45);
  width: 100%; max-width: 560px;
  height: calc(100vh - 32px); max-height: 760px;
  display: flex; flex-direction: column; overflow: hidden;
}
.km-root .km-setup-title {
  text-align: center; padding: 18px 24px 12px;
  font-family: 'Dela Gothic One', sans-serif;
  font-size: clamp(1.2rem, 3.5vw, 1.6rem);
  color: var(--main); letter-spacing: .04em;
  flex-shrink: 0; border-bottom: 1.5px solid var(--border);
}
.km-root .km-setup-title em { font-style: normal; color: var(--gold-d); }

.km-root .km-unit-scroll { flex: 1; overflow-y: auto; min-height: 0; }
.km-root .km-unit-item { border-bottom: 1px solid var(--border); }
.km-root .km-unit-item:last-child { border-bottom: none; }
.km-root .km-unit-header {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; background: #f4f7fb;
  cursor: pointer; user-select: none; transition: background .12s;
}
.km-root .km-unit-header:hover { background: #ddeaf8; }
.km-root .km-unit-name   { flex: 1; font-size: .93rem; font-weight: 700; color: var(--main); }
.km-root .km-unit-count  { font-size: .78rem; color: #999; white-space: nowrap; flex-shrink: 0; }
.km-root .km-unit-sel    { font-size: .78rem; color: var(--gold-d); font-weight: 700; white-space: nowrap; flex-shrink: 0; margin-right: 2px; }
.km-root .km-unit-toggle { font-size: .65rem; color: #bbb; transition: transform .18s; flex-shrink: 0; }
.km-root .km-unit-toggle.km-open { transform: rotate(90deg); }

.km-root .km-kanji-grid {
  display: none; flex-wrap: wrap; gap: 6px;
  padding: 10px 14px 12px; background: #f0f4fb;
  border-top: 1px solid var(--border);
}
.km-root .km-kanji-grid.km-open { display: flex; }
.km-root .km-kanji-chip {
  display: flex; align-items: center; gap: 5px; padding: 5px 10px;
  background: #fff; border: 1.5px solid var(--border); border-radius: 8px;
  cursor: pointer; user-select: none; transition: background .1s;
}
.km-root .km-kanji-chip:hover { background: #e4edf8; }
.km-root .km-kanji-chip.km-checked { background: #dceeff; border-color: var(--main-l); }
.km-root .km-kanji-chip input { width: 14px; height: 14px; accent-color: var(--main); cursor: pointer; margin: 0; }
.km-root .km-kanji-chip span  { font-size: 1.3rem; color: var(--main); line-height: 1; }

.km-root .km-unit-cb-btn {
  all: unset; cursor: pointer;
  font-size: .72rem; font-weight: 700;
  color: var(--main-l); border: 1.5px solid var(--main-l);
  border-radius: 6px; padding: 2px 7px;
  transition: all .13s; flex-shrink: 0; white-space: nowrap;
  font-family: 'BIZ UDGothic', sans-serif;
}
.km-root .km-unit-cb-btn:hover { background: var(--main-l); color: #fff; }
.km-root .km-unit-cb-btn.all-selected { background: var(--main); color: #fff; border-color: var(--main); }

.km-root .km-setup-footer {
  flex-shrink: 0; border-top: 2px solid var(--border);
  background: #fff; padding: 12px 20px 16px;
  display: flex; flex-direction: column; gap: 10px;
}
.km-root .km-footer-mode { display: flex; flex-direction: column; gap: 6px; }
.km-root .km-opt-label {
  font-size: .75rem; font-weight: 700; color: #888; letter-spacing: .05em;
}
.km-root .km-mode-row { display: flex; gap: 5px; }
.km-root .km-mode-btn {
  flex: 1; padding: 8px 4px;
  border: 2px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--main);
  font-weight: 700; font-size: .78rem; cursor: pointer; text-align: center;
  transition: all .13s; font-family: 'BIZ UDGothic', sans-serif;
  line-height: 1.4; white-space: nowrap;
}
.km-root .km-mode-btn:hover { background: #ddeaf8; border-color: var(--main-l); }
.km-root .km-mode-btn.km-active { background: var(--main); color: #fff !important; border-color: var(--main); }
.km-root .km-loading {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 48px 24px; gap: 18px; flex: 1;
}
.km-root .km-spinner {
  width: 48px; height: 48px;
  border: 5px solid var(--border); border-top-color: var(--main);
  border-radius: 50%; animation: kmSpin .8s linear infinite;
}
@keyframes kmSpin { to { transform: rotate(360deg); } }
.km-root .km-loading-text { font-size: .95rem; color: #888; font-weight: 700; }
.km-root .km-load-error {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 40px 24px; gap: 14px; text-align: center; flex: 1;
}
.km-root .km-load-error-icon { font-size: 2.8rem; }
.km-root .km-load-error-text { font-size: .95rem; color: #c0392b; font-weight: 700; }

/* =====================================================
   ゲーム画面
   ===================================================== */
.km-root .km-game {
  position: fixed; inset: 0;
  display: flex; flex-direction: column;
  background: linear-gradient(135deg, #fff 0%, var(--bg) 100%);
  z-index: 9980;
}
.km-root .km-game-header {
  background: var(--main); border-bottom: 3px solid var(--gold);
  height: var(--header); display: flex; align-items: center;
  justify-content: space-between; padding: 0 16px; flex-shrink: 0;
}
.km-root .km-game-header h1 {
  all: unset;
  font-family: 'Dela Gothic One', sans-serif; color: #fff !important;
  font-size: 1.05rem; letter-spacing: .05em;
}
.km-root .km-pill-row { display: flex; gap: 7px; align-items: center; }
.km-root .km-pill {
  display: inline-flex; align-items: center; gap: 4px; padding: 4px 11px;
  border-radius: 999px; background: rgba(255,255,255,.13);
  color: #fff !important; font-size: .86rem; font-weight: 700;
}
.km-root .km-pill strong { color: var(--gold-l) !important; font-size: .96rem; }

.km-root .km-game-body {
  flex: 1; display: grid;
  grid-template-columns: var(--sidebar) 1fr;
  overflow: hidden; min-height: 0;
}
.km-root .km-sidebar-left {
  background: #fff; border-right: 2px solid var(--border);
  display: flex; flex-direction: column; padding: 10px; gap: 8px; overflow-y: auto;
}
.km-root .km-sb-section {
  background: var(--bg); border: 1.5px solid var(--border);
  border-radius: 9px; padding: 9px;
}
.km-root .km-sb-section h3 {
  all: unset;
  display: flex; align-items: center; gap: 4px;
  font-size: .78rem; color: var(--main) !important; font-weight: 700 !important;
  margin-bottom: 6px;
}
.km-root .km-sb-section h3::before { content: ''; width: 3px; height: 11px; background: var(--gold); border-radius: 2px; }
.km-root .km-sb-btns { display: flex; flex-direction: column; gap: 6px; }

.km-root .km-speed-btn {
  flex: 1; padding: 7px 4px;
  border: 2px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--main);
  font-weight: 700; font-size: .78rem; cursor: pointer; text-align: center; transition: all .13s;
  font-family: 'BIZ UDGothic', sans-serif;
}
.km-root .km-speed-btn.km-active { background: var(--main); color: #fff !important; border-color: var(--main); }

.km-root .km-footer-bottom { display: flex; align-items: center; gap: 10px; }
.km-root .km-sel-count-bar { font-size: .85rem; color: #888; white-space: nowrap; flex-shrink: 0; }
.km-root .km-sel-count-bar strong { color: var(--main); font-size: 1rem; }
.km-root .km-footer-bottom .km-btn { flex: 1; font-size: 1rem; padding: 13px; }

/* ゲーム画面内の speed-btn */
.km-root .km-speed-btn {
  flex: 1; padding: 7px 4px;
  border: 2px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--main);
  font-weight: 700; font-size: .78rem; cursor: pointer; text-align: center; transition: all .13s;
  font-family: 'BIZ UDGothic', sans-serif;
}
.km-root .km-speed-btn.km-active { background: var(--main); color: #fff !important; border-color: var(--main); }

/* ===== キャンバスエリア ===== */
.km-root .km-stage {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 12px; gap: 12px;
  flex: 1; min-width: 0; overflow: hidden;
}
.km-root .km-canvas-outer {
  /* 縦横ともステージの利用可能幅に収まる正方形 */
  width: min(calc(100vh - var(--header) - 80px), 100%);
  aspect-ratio: 1 / 1;
  border-radius: 12px;
  box-shadow: 0 4px 24px rgba(30,58,95,.15);
  background: #fff;
  transition: box-shadow .3s;
  flex-shrink: 0;
}
/* かがみモード：枠を青系に */
.km-root .km-canvas-outer.mode-mirror  { box-shadow: 0 4px 24px rgba(45,90,143,.4); }
/* 逆さまモード：枠をゴールドに */
.km-root .km-canvas-outer.mode-flip    { box-shadow: 0 4px 24px rgba(212,175,55,.5); }

.km-root .km-canvas-outer svg { width: 100%; height: 100%; }
.km-root .km-gridline   { stroke: #edf1f7; stroke-width: 0.5; fill: none; }
.km-root .km-gridcenter { stroke: var(--gold); stroke-width: 0.5; stroke-dasharray: 4 4; opacity: 0.4; fill: none; }

/* ===== 筆画 ===== */
.km-root .km-stroke {
  fill: none; stroke-linecap: round; stroke-linejoin: round; stroke-width: 3.5;
  stroke: transparent;
}
.km-root .km-stroke.s-done    { stroke: var(--main); }
.km-root .km-stroke.s-drawing {
  stroke: #e05a2b;
  animation: km-draw linear forwards;
}
@keyframes km-draw {
  from { stroke-dashoffset: var(--len); }
  to   { stroke-dashoffset: 0; }
}

/* モードラベル */
.km-root .km-mode-label {
  font-family: 'Dela Gothic One', sans-serif;
  font-size: 1rem; letter-spacing: .06em;
  padding: 5px 18px; border-radius: 999px;
  background: var(--main); color: #fff;
  transition: background .3s;
  display: inline-block; /* 幅をテキストに合わせる */
  align-self: center;
}
.km-root .km-mode-label.mode-mirror { background: var(--main-l); }
.km-root .km-mode-label.mode-flip   { background: var(--gold-d); }

/* フラッシュ */
.km-root .km-flash {
  position: fixed; top: 50%; left: 50%;
  transform: translate(-50%,-50%) scale(.5);
  font-family: 'Dela Gothic One', sans-serif;
  font-size: 3.5rem; padding: 16px 44px; border-radius: 18px;
  opacity: 0; pointer-events: none; z-index: 99999; white-space: nowrap;
}
.km-root .km-flash.show-end { background: rgba(46,204,113,.95); color: #fff; animation: kmFlash 1.4s ease forwards; }
@keyframes kmFlash {
  0%   { opacity:0; transform:translate(-50%,-50%) scale(.6); }
  20%  { opacity:1; transform:translate(-50%,-50%) scale(1.08); }
  70%  { opacity:1; transform:translate(-50%,-50%) scale(1); }
  100% { opacity:0; transform:translate(-50%,-50%) scale(.9); }
}

@media (max-width: 640px) {
  .km-root { --sidebar: 130px; }
}