:root {
  color-scheme: light;
  --paper:#f2e9d7; --panel:#fffdf6; --panel-2:#faf3e3;
  --ink:#2b2118; --muted:#8a7a63; --line:#d9c9a8;
  --accent:#e2801f; --accent-2:#2f9e6b; --danger:#d4503c;
  --soil:#7a6446; --soil-dark:#5c4a33; --cave:#2f2418;
  --pixel-font:"DotGothic16","Press Start 2P",monospace;
  --body-font:"Hiragino Kaku Gothic ProN","Yu Gothic",system-ui,sans-serif;
  --read-font:"Hiragino Kaku Gothic ProN","Yu Gothic",system-ui,sans-serif;
  --mono-font:Consolas,"SF Mono","DejaVu Sans Mono",monospace;
}
* { box-sizing:border-box; }
body {
  margin:0; min-height:100vh; padding-bottom:40px; color:var(--ink); font-family:var(--body-font);
  background-color:var(--paper);
  /* 方眼紙（自由帳）の下敷き */
  background-image:linear-gradient(#0000000c 1px,transparent 1px),linear-gradient(90deg,#0000000c 1px,transparent 1px);
  background-size:22px 22px;
}
button,input { font:inherit; }
button { cursor:pointer; }
.game-shell { width:min(100% - 32px,760px); margin:auto; padding:28px 0 0; }
.site-header,.game-topline,.stats { display:flex; align-items:center; justify-content:space-between; }
.site-header { margin-bottom:18px; }
h1 { margin:0; font-family:var(--pixel-font); font-size:clamp(1.6rem,5vw,2.4rem); letter-spacing:.06em; text-shadow:3px 3px 0 var(--accent); }

/* 紙にペンで囲ったような、影をぼかさない箱 */
.game-panel { position:relative; padding:18px; background:var(--panel); border:3px solid var(--ink); border-radius:6px; box-shadow:6px 6px 0 #2b211826; }
.game-topline { margin-bottom:4px; font-family:var(--pixel-font); font-size:.8rem; color:var(--muted); }
.game-topline p { margin:0; color:var(--ink); }
.stats { gap:14px; }
.stats b { margin-left:5px; color:var(--ink); font-variant-numeric:tabular-nums; }

.mine-area { width:min(100%,500px); margin:16px auto 0; }
.pixel-art { position:relative; aspect-ratio:1; overflow:hidden; background:var(--cave); border:4px solid var(--ink); border-radius:4px; }
#kanji-canvas { display:block; width:100%; height:100%; }
.pixel-cover { position:absolute; inset:0; display:grid; grid-template-columns:repeat(50,1fr); grid-template-rows:repeat(50,1fr); }
.pixel { position:relative; z-index:0; background:var(--soil); border:1px solid var(--soil-dark); }
.pixel.revealing { z-index:10; animation:block-impact .72s ease-out forwards; }
.pixel.uncovered { background:transparent; border-color:transparent; }
.pixel.refilling { animation:refill .5s ease-out; }
.falling-fragment { position:absolute; z-index:20; width:1%; height:1%; background:var(--soil); border:1px solid var(--soil-dark); box-shadow:0 3px 4px #0006; opacity:1; pointer-events:none; }
.falling-fragment.falling { animation:falling-fragment 1.1s cubic-bezier(.2,.75,.3,1) forwards; }
.pickaxe { position:absolute; z-index:30; font-family:"Segoe UI Emoji","Segoe UI Symbol",sans-serif; font-size:clamp(18px,4vw,30px); line-height:1; opacity:0; transform-origin:78% 82%; filter:drop-shadow(2px 3px 2px #0009); pointer-events:none; }
.pickaxe.swing { animation:pickaxe-swing .72s cubic-bezier(.2,.8,.25,1) forwards; }
@keyframes block-impact { 0%,48% { transform:translate(0,0) scale(1); } 58% { transform:translate(0,2%) scale(.9,.84); } 66% { transform:translate(0,-1%) scale(1.04); } 76% { transform:translate(0,0) scale(.98); } 100% { transform:translate(0,0) scale(1); } }
@keyframes falling-fragment { 0% { opacity:1; transform:translate(0,0) rotate(0) scale(1); } 12% { opacity:1; transform:translate(0,-18%) rotate(8deg) scale(1.05); } 100% { opacity:0; transform:translate(var(--dx),var(--dy)) rotate(var(--rotation)) scale(.35); } }
@keyframes pickaxe-swing { 0% { opacity:0; transform:translate(24%,-12%) rotate(54deg); } 12% { opacity:1; transform:translate(30%,-20%) rotate(64deg); } 38% { opacity:1; transform:translate(38%,-78%) rotate(82deg); } 48% { opacity:1; transform:translate(34%,-74%) rotate(78deg); } 64% { opacity:1; transform:translate(-8%,18%) rotate(-28deg) scale(1.08); } 72% { opacity:1; transform:translate(-13%,25%) rotate(-36deg) scale(.96); } 100% { opacity:0; transform:translate(-16%,29%) rotate(-42deg) scale(.9); } }
@keyframes refill { 0% { opacity:.15; transform:scale(1.4); } 100% { opacity:1; transform:scale(1); } }
.progress { margin:8px 0 0; color:var(--muted); font-family:var(--pixel-font); font-size:.78rem; text-align:right; }

.typing-area { margin-top:18px; padding:16px; background:var(--panel-2); border:2px dashed var(--line); border-radius:6px; }
.instruction { margin:0 0 10px; color:var(--muted); font-size:.82rem; }
.typing-meaning { margin:0 0 10px; color:var(--ink); font-family:var(--read-font); font-size:1.35rem; font-weight:700; line-height:1.6; letter-spacing:.02em; text-align:center; }
.typing-text { min-height:2.6em; margin:0 0 6px; font-family:var(--mono-font); font-size:1.6rem; font-weight:700; line-height:1.75; letter-spacing:.08em; text-align:center; }
.typing-text span { display:inline-block; color:var(--muted); }
.typing-text .typed { color:var(--accent-2); }
.typing-text .current { color:var(--ink); background:#e2801f40; box-shadow:0 3px 0 var(--accent); }
.message { min-height:1.4em; margin:9px 0 0; color:var(--muted); font-size:.78rem; }
.success { color:var(--accent-2); }
.warning { color:var(--danger); }

/* 回答欄は掘る作業と混ざらないよう、目立たせる */
.guess-area { margin-top:16px; padding:16px; background:#fff6e6; border:3px solid var(--accent); border-radius:6px; box-shadow:4px 4px 0 #e2801f33; }
.guess-label { display:flex; align-items:center; gap:8px; margin:0 0 10px; color:var(--ink); font-size:1rem; font-weight:700; }
.guess-badge { padding:3px 9px; color:#fff; background:var(--accent); border-radius:3px; font-family:var(--pixel-font); font-size:.72rem; }
.guess-row { display:flex; align-items:center; gap:9px; }
.guess-row input { flex:1; width:100%; padding:14px 16px; color:var(--ink); background:#fff; border:2px solid var(--ink); border-radius:4px; font-size:1.05rem; outline:none; }
.guess-row input::placeholder { color:#b3a48c; }
.guess-row input:focus { border-color:var(--accent); box-shadow:3px 3px 0 #e2801f55; }
.primary-button { padding:13px 20px; color:#fff; background:var(--accent); border:2px solid var(--ink); border-radius:4px; box-shadow:3px 3px 0 var(--ink); font-family:var(--pixel-font); font-size:.95rem; white-space:nowrap; transition:transform .06s,box-shadow .06s; }
.primary-button:hover:not(:disabled) { background:#f0902c; }
.primary-button:active:not(:disabled) { transform:translate(3px,3px); box-shadow:0 0 0 var(--ink); }
.primary-button.large { width:100%; margin-top:18px; padding:16px; font-size:1.1rem; }
button:disabled,input:disabled { cursor:default; opacity:.5; }

/* PC・タッチ端末ともに回答は8択式 */
.answer-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:8px; margin-top:10px; }
.answer-button { padding:12px 0; color:var(--ink); background:#fff; border:2px solid var(--ink); border-radius:4px; box-shadow:2px 2px 0 var(--ink); font-size:1.35rem; font-weight:800; }
.answer-button:active:not(:disabled) { transform:translate(2px,2px); box-shadow:0 0 0 var(--ink); }
.answer-button.wrong { border-color:var(--danger); color:var(--danger); }
/* スマホ（タッチ端末）は かな のタップ入力。OSキーボードを出さないので絵が隠れない */
.answer-button.wrong { animation:shake .38s ease-in-out; }
@keyframes shake { 0%,100% { transform:translateX(0); } 25% { transform:translateX(-5px); } 75% { transform:translateX(5px); } }

/* スタート画面・カウントダウン・リザルト画面 */
.overlay { position:absolute; inset:0; z-index:40; display:flex; align-items:center; justify-content:center; padding:18px; background:#f2e9d7f2; border-radius:3px; }
.overlay.hidden { display:none; }
.overlay-card { width:min(100%,430px); max-height:100%; overflow-y:auto; padding:20px; text-align:center; background:var(--panel); border:3px solid var(--ink); border-radius:6px; box-shadow:6px 6px 0 var(--ink); }
.overlay-eyebrow { margin:0 0 6px; color:var(--accent); font-family:var(--pixel-font); font-size:.78rem; letter-spacing:.12em; }
.overlay-card h2 { margin:0 0 16px; font-size:1.2rem; }
.rule-list { margin:0; padding:0 0 0 1.2em; font-size:.9rem; line-height:1.8; text-align:left; }
.rule-list li { margin-bottom:5px; }
.rule-list li::marker { color:var(--accent); font-weight:800; }
.countdown { background:#f2e9d7e6; }
.countdown-number { font-family:var(--pixel-font); font-size:clamp(4rem,22vw,8rem); color:var(--accent); text-shadow:6px 6px 0 var(--ink); animation:countdown-pop .9s ease-out; }
@keyframes countdown-pop { 0% { transform:scale(.4); opacity:0; } 25% { transform:scale(1.15); opacity:1; } 40% { transform:scale(1); } 100% { transform:scale(1); opacity:1; } }
.result-time { margin:4px 0 2px; color:var(--accent); font-family:var(--pixel-font); font-size:2.3rem; font-variant-numeric:tabular-nums; text-shadow:3px 3px 0 var(--ink); }
.result-detail { margin:0 0 18px; color:var(--muted); font-size:.78rem; }
.result-label { margin:0 0 9px; color:var(--muted); font-size:.82rem; }
.result-actions { display:flex; gap:9px; justify-content:center; margin-top:16px; }
.ghost-button { display:inline-block; padding:10px 16px; color:var(--ink); background:#fff; border:2px solid var(--ink); border-radius:4px; font-size:.85rem; text-decoration:none; }
.ghost-button:hover { background:#ffe9c9; }
.ranking-link { color:var(--ink); font-size:.85rem; text-decoration:none; border-bottom:2px solid var(--accent); }
.ranking-link:hover { color:var(--accent); }

/* ランキングページ */
.mode-tabs { display:flex; gap:8px; margin-bottom:14px; }
.mode-tab { flex:1; padding:11px 0; color:var(--ink); background:#fff; border:2px solid var(--ink); border-radius:4px; font-size:.85rem; font-weight:700; }
.mode-tab.active { color:#fff; background:var(--accent); box-shadow:2px 2px 0 var(--ink); }
.ranking-note { margin:0 0 14px; color:var(--muted); font-size:.75rem; }
.ranking-list { margin:0; padding:0; list-style:none; }
.ranking-item { display:flex; align-items:center; gap:12px; padding:11px 12px; border-bottom:2px dotted var(--line); }
.ranking-item:nth-child(1) .ranking-rank { color:var(--accent); }
.ranking-rank { width:2em; font-family:var(--pixel-font); color:var(--muted); text-align:right; }
.ranking-name { flex:1; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.ranking-time { font-family:var(--pixel-font); font-variant-numeric:tabular-nums; }

@media (max-width:560px) { .game-shell { width:min(100% - 20px,760px); padding-top:20px; } .game-panel { padding:13px; } .typing-area { padding:13px; } .answer-grid { gap:6px; } .answer-button { font-size:1.2rem; } }
/* タッチ端末では、絵と選択肢が1画面に収まるよう詰める */
body.touch-mode .site-header { margin-bottom:12px; }
body.touch-mode h1 { font-size:1.4rem; }
body.touch-mode .mine-area { width:min(100%,340px); margin-top:12px; }
body.touch-mode .instruction { display:none; }
body.touch-mode .typing-area { margin-top:10px; padding:10px; }
body.touch-mode .typing-meaning { margin-bottom:5px; font-size:1.05rem; }
body.touch-mode .typing-text { min-height:2.2em; margin-bottom:8px; font-family:var(--pixel-font); font-size:1.35rem; letter-spacing:.02em; line-height:1.5; }
body.touch-mode .message { margin-top:6px; }
body.touch-mode .guess-area { margin-top:12px; padding:12px; }
body.touch-mode .guess-label { margin-bottom:6px; font-size:.88rem; }
body.touch-mode .progress { margin-top:6px; }
@media (max-height:700px) { body.touch-mode .flick-key { min-height:40px; font-size:1.2rem; } }

/* コンボ表示と音のオン・オフ */
.header-actions { display:flex; align-items:center; gap:10px; }
.icon-button { padding:6px 10px; background:#fff; border:2px solid var(--ink); border-radius:4px; font-size:1rem; line-height:1; }
.icon-button:hover { background:#ffe9c9; }
.combo { color:var(--muted); font-family:var(--pixel-font); font-size:.95rem; }
.combo.boost { color:var(--accent); }
.combo.pop { animation:combo-pop .35s ease-out; }
@keyframes combo-pop { 0% { transform:scale(1); } 35% { transform:scale(1.35); } 100% { transform:scale(1); } }

/* フリック入力キーボード（スマホ） */
.flick-keyboard { display:none; }
body.touch-mode .flick-keyboard { display:grid; grid-template-columns:repeat(3,1fr); gap:5px; margin-top:8px; touch-action:none; }
.flick-keyboard.idle { opacity:.4; pointer-events:none; }
.flick-key { position:relative; min-height:40px; padding:6px 0 3px; color:var(--ink); background:#fff; border:2px solid var(--ink); border-radius:5px; box-shadow:2px 2px 0 var(--ink); font-family:var(--pixel-font); font-size:1.35rem; line-height:1.1; touch-action:none; user-select:none; }
.flick-key .flick-guide { display:block; color:var(--muted); font-size:.6rem; letter-spacing:.08em; }
.flick-key.pressed { transform:translate(2px,2px); background:#ffe9c9; box-shadow:0 0 0 var(--ink); }
.flick-key.wrong { border-color:var(--danger); color:var(--danger); animation:shake .38s ease-in-out; }
/* 押している間だけ出る、フリック先の候補 */
.flick-preview { position:absolute; inset:-58px -58px; z-index:50; pointer-events:none; }
.flick-cell { position:absolute; top:50%; left:50%; width:40px; height:40px; margin:-20px 0 0 -20px; display:flex; align-items:center; justify-content:center; background:var(--panel); border:2px solid var(--ink); border-radius:5px; font-family:var(--pixel-font); font-size:1.2rem; }
.flick-cell.left { transform:translateX(-44px); }
.flick-cell.right { transform:translateX(44px); }
.flick-cell.up { transform:translateY(-44px); }
.flick-cell.down { transform:translateY(44px); }
.flick-cell.active { color:#fff; background:var(--accent); border-color:var(--ink); }

/* 縦が短い画面でも文章と回答が隠れないよう、余白ではなく絵を縮める */
body { min-height:100dvh; }
.game-shell { display:flex; flex-direction:column; min-height:100dvh; }
.game-panel { display:flex; flex-direction:column; flex:1 1 auto; min-height:0; }
.mine-area { display:flex; flex-direction:column; flex:1 1 auto; min-height:0; }
.pixel-art { flex:1 1 auto; min-height:0; width:auto; height:auto; max-width:100%; max-height:100%; margin:0 auto; aspect-ratio:1; }
.typing-area,.guess-area { flex:0 0 auto; }

/* 絵は画面の高さに応じて縮める。文章と回答が押し出されないようにするため */
.pixel-art { max-height:50vh; }
body.touch-mode .pixel-art { max-height:26vh; }
/* スマホは回答欄を下から出すシートにする */
.open-answer { display:none; }
body.touch-mode .open-answer { display:block; width:100%; margin-top:8px; padding:11px; }
.close-answer { display:none; }
body.touch-mode .close-answer { display:inline-block; margin-top:10px; }
body.touch-mode .guess-area { display:none; }
body.touch-mode.answering .guess-area { display:block; position:fixed; left:0; right:0; bottom:0; z-index:60; margin:0; border-radius:14px 14px 0 0; box-shadow:0 -6px 0 #2b211826; }

/* モード選択 */
.mode-picker { display:grid; gap:10px; margin-top:18px; }
.mode-card { display:block; padding:14px; color:var(--ink); background:#fff; border:2px solid var(--ink); border-radius:5px; box-shadow:3px 3px 0 var(--ink); text-align:left; }
.mode-card b { display:block; font-family:var(--pixel-font); font-size:1.05rem; }
.mode-card span { display:block; margin-top:4px; color:var(--muted); font-size:.78rem; }
.mode-card:hover { background:#ffe9c9; }
.mode-card:active { transform:translate(3px,3px); box-shadow:0 0 0 var(--ink); }
.flick-spacer { display:block; }
body.touch-mode { padding-bottom:0; }
body.touch-mode .game-shell { padding-bottom:0; }

/* 入力途中のかな（が の「か」まで打てた状態） */
.typing-text .pending { color:var(--accent); background:#e2801f22; border-bottom:2px dashed var(--accent); box-shadow:none; }

/* コンボ演出。盤面には重ねず、上のステータス行の中で出す */
.game-topline { position:relative; }
.combo-burst { position:absolute; right:0; bottom:100%; z-index:35; padding:4px 10px; color:#fff; background:var(--accent); border:2px solid var(--ink); border-radius:4px; box-shadow:3px 3px 0 var(--ink); font-family:var(--pixel-font); font-size:1.05rem; white-space:nowrap; opacity:0; pointer-events:none; }
.combo-burst.show { animation:combo-burst .9s cubic-bezier(.2,.8,.25,1) forwards; }
.combo-burst.tier-up { background:var(--accent-2); font-size:1.25rem; }
@keyframes combo-burst {
  0% { opacity:0; transform:translateY(8px) scale(.6); }
  18% { opacity:1; transform:translateY(-2px) scale(1.25); }
  32% { transform:translateY(0) scale(1); }
  70% { opacity:1; transform:translateY(-4px) scale(1); }
  100% { opacity:0; transform:translateY(-16px) scale(.95); }
}
.ranking-sub { display:block; color:var(--muted); font-size:.68rem; letter-spacing:.04em; }

/* シーズン表示 */
.season-label { padding:4px 9px; color:#fff; background:var(--ink); border-radius:3px; font-family:var(--pixel-font); font-size:.7rem; letter-spacing:.06em; }
.season-select { padding:8px 10px; color:var(--ink); background:#fff; border:2px solid var(--ink); border-radius:4px; font-family:var(--pixel-font); font-size:.85rem; }
.season-row { display:flex; align-items:center; gap:8px; margin-bottom:12px; }
.season-row label { color:var(--muted); font-size:.78rem; }