:root{color-scheme:dark;--bg:#0d171b;--panel:#142329;--ink:#f1f5e9;--muted:#a9bdb6;--accent:#d6f775;--line:#2c3f44;font-family:ui-sans-serif,system-ui,-apple-system,"Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif;background:var(--bg);color:var(--ink)}
*{box-sizing:border-box}body{margin:0;background:var(--bg)}
button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}a{color:inherit}
button:focus-visible,a:focus-visible,canvas:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
[hidden]{display:none!important}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap}
.for-pointer{display:inline}.for-touch{display:none}
@media(hover:none) and (pointer:coarse){.for-pointer{display:none}.for-touch{display:inline}}

/* 1画面：見出し＋速度（上）・3D（残り全部）・速報（下）。注記と共有はスクロールした先へ。 */
#app,footer{width:min(1080px,calc(100% - 28px));margin:0 auto}
#app{height:100svh;min-height:480px;display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:auto auto minmax(0,1fr) auto;padding-bottom:10px}
#app>*{min-width:0}
/* 行を固定する（速度欄・速報欄を畳んだとき、3Dの欄が伸びる行からずれないように） */
.masthead{grid-row:1}.instrument{grid-row:2}.scene-shell{grid-row:3}.bulletin{grid-row:4}
.masthead{display:flex;align-items:center;gap:10px;height:52px;border-bottom:1px solid var(--line)}
.masthead .day{font-size:12px;letter-spacing:.1em;font-weight:800;text-decoration:none;white-space:nowrap}
.masthead .day span{color:var(--muted);font-weight:400}
h1{flex:1;min-width:0;margin:0;font-size:17px;font-weight:800;letter-spacing:-.04em;text-align:center;white-space:nowrap}
h1 span{color:var(--accent)}
#mute{min-height:44px;min-width:44px;padding:0 14px;border:1px solid var(--line);border-radius:22px;background:transparent;color:var(--ink);font-size:12px;white-space:nowrap}

.instrument{position:relative;margin-top:8px;padding:6px 14px 12px;background:var(--panel);border:1px solid var(--line);border-bottom:0;border-radius:14px 14px 0 0}
/* 数字は画面幅に比例して大きくなる（10vw・行高1.05）。欄の高さも幅に合わせないと、420px幅あたりから数字の下が次の行に隠れる */
.speed-row{display:flex;align-items:baseline;gap:6px;min-width:0;height:clamp(44px,10.6vw,70px);overflow:hidden}
#speed[data-len="long"]{font-size:clamp(26px,8vw,56px)}
#speed{font-size:clamp(34px,10vw,64px);font-weight:600;letter-spacing:-.05em;line-height:1.05;color:var(--accent);font-variant-numeric:tabular-nums;white-space:nowrap}
.unit{font-size:13px;color:var(--muted)}
#world-name{margin-left:auto;align-self:center;font-size:12px;border:1px solid var(--line);border-radius:999px;padding:4px 10px;white-space:nowrap;transition:background-color .4s}
#app[data-flash="world"] #world-name{background:#d6f77533}
.milestone-row{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:3px;font-size:13px;min-height:18px}
#next{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#next i{font-style:normal;font-weight:800;color:var(--accent);margin-right:7px}
#count{color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}
.progress-track{position:absolute;left:0;right:0;bottom:0;height:3px;background:#24383d}
#progress{width:0;height:100%;background:var(--accent)}

.scene-shell{position:relative;min-height:0;overflow:hidden;background:#3d5a55;border:1px solid var(--line);border-top:0;border-bottom:0}
canvas#scene{display:block;width:100%;height:100%;touch-action:auto;cursor:pointer}
/* プレイ中の入力面では2本指の拡大もさせない（拡大が残ると猫が画面外へ出た）。拡大は入力面の外（速度欄・速報・下部）で使える。 */
#input-surface{position:absolute;inset:0 44px 0 0;touch-action:none;cursor:pointer}
#page-strip{position:absolute;inset:0 0 0 auto;width:44px;touch-action:pan-y pinch-zoom;display:flex;align-items:center;justify-content:center;user-select:none}
#page-strip span{display:grid;place-items:center;width:22px;height:34px;border-radius:11px;background:#0d171b66;color:#ffffffcc;font-size:13px}
.ripple{position:absolute;width:44px;height:44px;margin:-22px 0 0 -22px;border-radius:50%;border:2px solid #ffffffcc;pointer-events:none;animation:ripple .45s ease-out forwards}
@keyframes ripple{from{transform:scale(.35);opacity:1}to{transform:scale(1.4);opacity:0}}
@media(prefers-reduced-motion:reduce){.ripple{animation:none;opacity:.8;transform:scale(.6)}}
#app:not([data-state="playing"]) #input-surface,#app:not([data-state="playing"]) #page-strip,#app:not([data-state="playing"]) .scene-bottom{display:none}
#toast,#relativity,#meow,.scene-bottom{position:absolute;pointer-events:none}

/* 追い越した瞬間の一言。1つずつ出して消す。 */
/* 長い名前（ウサイン・ボルト（100mの平均）など）は省略せず2行まで折り返す */
#toast{top:14px;left:50%;width:max-content;max-width:calc(100% - 72px);transform:translate(-50%,-6px);opacity:0;padding:7px 14px;border-radius:18px;background:#0d171bd9;color:var(--ink);font-size:14px;font-weight:700;line-height:1.35;text-align:center;white-space:normal;transition:opacity .18s,transform .18s}
#toast.show{opacity:1;transform:translate(-50%,0)}
#toast b{color:var(--accent)}
#toast.world{background:#d6f775;color:#15291d}#toast.world b{color:#15291d}

#relativity{top:12px;left:12px;max-width:calc(100% - 68px);padding:10px 13px;border-left:2px solid #bfe4ff;background:#0a1226d9;border-radius:0 8px 8px 0}
#relativity>strong{display:block;color:#dff2ff;font-size:20px;letter-spacing:-.03em}
#relativity .clocks{display:flex;gap:14px;margin-top:4px;font-size:12px;color:var(--muted)}
#relativity .clocks span{display:flex;flex-direction:column}
#relativity .clocks b{color:var(--ink);font-size:18px;font-variant-numeric:tabular-nums}
#relativity .clocks span+span b{color:#bfe4ff}
#relativity p{margin:5px 0 0;font-size:12px}
#gamma{font-size:15px;color:#fff}
/* 鳴き声の字幕：白い雲の上でも読めるよう、暗い下地と縁を付ける */
#meow{left:58%;top:40%;font-size:17px;font-weight:800;color:#fff;background:#0d171bcc;padding:2px 8px;border-radius:8px;text-shadow:0 1px 2px #000;transform:rotate(-8deg);white-space:nowrap}
#meow:empty{display:none}

.scene-bottom{left:0;right:44px;bottom:0;display:flex;flex-direction:column;align-items:center;gap:6px}
#sound-note{font-size:12px;padding:4px 9px;border-radius:6px;background:#0d171bd9;color:#fff}
#sound-note:empty{display:none}
#hold-hint{margin:0;padding:8px 14px;border-radius:999px;background:#0d171be0;color:var(--ink);font-size:13px;font-weight:700;margin-bottom:12px;transition:opacity .35s,transform .35s}
#app[data-hint="off"] #hold-hint{opacity:0;transform:translateY(8px)}
#thrust-bar{position:absolute;left:0;bottom:0;width:100%;height:4px;background:var(--accent);transform-origin:left;transform:scaleX(0)}

.overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:18px;background:linear-gradient(180deg,#0d171bcc,#0d171b99);backdrop-filter:blur(2px)}
.eyebrow{font-size:12px;letter-spacing:.14em;color:var(--accent)}
.overlay h2{font-size:clamp(25px,3.6vw,36px);line-height:1.45;letter-spacing:-.05em;margin:12px 0 6px}
.overlay p{font-size:13px;line-height:1.8;color:#e3eee4;margin:6px 0 16px}
.overlay>small{font-size:12px;color:var(--muted);margin-top:12px}
.primary{display:flex;justify-content:space-between;align-items:center;gap:40px;min-height:48px;min-width:230px;border:0;border-radius:8px;background:var(--accent);color:#15291d;font-size:15px;font-weight:800;padding:12px 20px}
.primary:hover{background:#e6ff9c}

/* 結果：光の猫 → 猫の1秒と地球の秒 → かかった時間と20/20 → もう一度・共有 */
.result{background:#0b1320;justify-content:flex-start;gap:0;overflow:auto;overscroll-behavior:contain;padding:14px}
/* 収まるときは中央、はみ出すときは上から読めてスクロールできる（justify-content:center だと上が切れる） */
.result>:first-child{margin-top:auto}.result>:last-child{margin-bottom:auto}
#result-photo{display:block;height:96px;width:auto;aspect-ratio:3/2;border-radius:10px;background:#081021;box-shadow:0 0 28px #bfe4ff44}
.result .eyebrow{margin-top:10px;color:#bfe4ff}
.result h2{font-size:26px;margin:4px 0}
.result .final-dilation{margin:2px 0;font-size:14px}
.result .final-dilation b{font-size:26px;color:#fff;font-variant-numeric:tabular-nums}
.result .final-line{display:flex;gap:16px;margin:2px 0;font-size:13px;color:var(--muted)}
.result .final-line b{color:var(--ink);font-variant-numeric:tabular-nums}
.result #best{margin:2px 0 10px;font-size:12px;color:var(--accent)}
.result .primary{min-height:48px}
.result-share{display:flex;align-items:center;gap:6px;margin-top:8px;flex-wrap:wrap;justify-content:center}
.result-share h3{margin:0 4px 0 0;font-size:12px;font-weight:600;color:var(--muted)}
.result-share a,.result-share button{min-height:44px;display:inline-flex;align-items:center;padding:0 12px;border:1px solid var(--line);border-radius:22px;background:transparent;color:var(--ink);font-size:13px;text-decoration:none}
#copy-status{min-height:16px;font-size:12px;color:var(--muted)}
.result .note{margin:4px 0 0;font-size:12px;color:var(--muted)}
.result-detail{width:min(420px,100%);font-size:12px;color:var(--muted);text-align:left}
.result-detail summary{min-height:44px;display:flex;align-items:center;justify-content:center;cursor:pointer}
.result-detail dl{margin:4px 0}.result-detail dl>div{display:flex;justify-content:space-between;gap:12px;padding:4px 0;border-bottom:1px solid var(--line)}
.result-detail dd{margin:0;color:var(--ink);font-variant-numeric:tabular-nums}.result-detail p{margin:6px 0;font-size:12px;line-height:1.6}
#app[data-state="result"] .instrument{display:none}
/* 結果の間は速報欄も畳み、結果の画面に高さを回す（390×664で「くわしい記録」が下で切れた） */
#app[data-state="result"] .bulletin{display:none}
#app[data-state="result"] .scene-shell{border-bottom:1px solid var(--line);border-radius:14px}
#app[data-state="result"] .scene-shell{border-top:1px solid var(--line);border-radius:14px 14px 0 0;margin-top:8px}

.bulletin{display:flex;align-items:center;min-height:44px;border:1px solid var(--line);border-radius:0 0 14px 14px;background:var(--panel);overflow:hidden}
.bulletin>span{display:flex;flex-direction:column;align-items:center;justify-content:center;flex:0 0 84px;align-self:stretch;border-right:1px solid var(--line);color:var(--accent);font-size:12px;font-weight:800}
.bulletin small{font-size:12px;letter-spacing:0;font-weight:400;color:var(--muted)}
.bulletin p{margin:0;padding:0 12px;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

footer{padding:14px 0 28px}
.footnote{margin:14px 0 0;font-size:12px;color:var(--muted)}
footer details{font-size:12px;color:var(--muted);line-height:1.85;margin:14px 0}
summary{cursor:pointer;min-height:44px;display:flex;align-items:center}
.privacy{font-size:12px;color:var(--muted)}

@media(min-width:700px){
  .masthead{height:64px}.masthead .day{font-size:12px}h1{font-size:24px;text-align:left}
  .instrument{padding:10px 22px 16px;margin-top:14px}.speed-row{height:70px}.unit{font-size:14px}#world-name{font-size:13px}.milestone-row{font-size:14px}
  #toast{font-size:16px;top:18px}#relativity{top:18px;left:18px}#relativity>strong{font-size:24px}
  .bulletin>span{flex-basis:92px}.bulletin p{font-size:14px;padding:0 18px}
  #app[data-state="result"] .scene-shell{margin-top:14px}
  #result-photo{height:108px}
}
/* 開始画面：文字とボタンを上寄せにして、下の猫を見せる */
#start-screen{justify-content:flex-start;padding-top:max(18px,6%);background:linear-gradient(180deg,#0d171bee 0%,#0d171bcc 55%,#0d171b22 82%,#0d171b00 100%);backdrop-filter:none}
@media(max-height:700px){#result-photo{height:80px}.result h2{font-size:22px}.result .final-dilation b{font-size:22px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}#toast,#hold-hint,#world-name{transition:none}#toast{transform:translate(-50%,0)}}