:root{--paper:oklch(94.5% .022 85);--paper-deep:oklch(90% .03 80);--ink:oklch(30% .035 45);--ink-soft:oklch(45% .03 50);--accent:oklch(68% .14 45);--accent-deep:oklch(56% .14 40);--good:oklch(68% .13 150);--good-deep:oklch(52% .12 150);--miss:oklch(80% .04 60);--star:oklch(82% .15 85);--card:oklch(98.5% .01 85);--radius-large:28px;--radius-small:16px;--line:3px;color:var(--ink);-webkit-tap-highlight-color:transparent;font-family:Hiragino Maru Gothic ProN,Zen Maru Gothic,Hiragino Sans,Yu Gothic UI,sans-serif}*{box-sizing:border-box}html,body{background:var(--paper);overscroll-behavior:none;touch-action:manipulation;-webkit-user-select:none;user-select:none;height:100%;margin:0;overflow:hidden}#app{height:100dvh;padding:max(12px, env(safe-area-inset-top)) max(20px, env(safe-area-inset-right)) max(14px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));grid-template-rows:auto auto 1fr auto;display:grid;position:relative}.top{grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;min-height:56px;display:grid}.top .place{justify-self:start}.top .stars{justify-self:end}.place{letter-spacing:.08em;background:var(--card);border:var(--line) solid var(--ink);border-radius:999px 999px 999px 12px;padding:6px 22px 8px 18px;font-size:clamp(22px,3.4vw,34px);font-weight:700}.place:empty{visibility:hidden}.stars{align-items:center;gap:6px;font-size:clamp(20px,2.8vw,28px);font-weight:700;display:flex}.stars svg{width:1.3em;height:1.3em;fill:var(--star);stroke:var(--ink);stroke-width:1.4px}.question{min-height:1.5em;margin:10px 4px 0;font-size:clamp(22px,3.2vw,32px);font-weight:600;line-height:1.45}.stage{min-height:0;position:relative;overflow:hidden}.stage canvas{border-radius:var(--radius-large);z-index:0;display:block;position:absolute;inset:0}.formula{letter-spacing:.06em;white-space:nowrap;background:color-mix(in oklch, var(--card) 88%, transparent);border:var(--line) solid var(--ink);border-radius:var(--radius-small);pointer-events:none;padding:2px 26px 4px;font-size:clamp(34px,5.4vw,60px);font-weight:800}.formula:empty{visibility:hidden}.formula .answer{color:var(--accent-deep)}.count-label{z-index:1;text-align:center;background:var(--card);border:var(--line) solid var(--ink);pointer-events:none;border-radius:999px;min-width:1.5em;padding:0 10px 3px;font-size:clamp(28px,4vw,42px);font-weight:800;animation:.22s ease-out label-pop;position:absolute;top:0;left:0}@keyframes label-pop{0%{scale:.4}}.bottom{grid-template-columns:172px 1fr 172px;align-items:center;gap:16px;padding-top:12px;display:grid}.tools{gap:20px;display:flex}.choices{justify-content:center;gap:clamp(14px,3vw,36px);display:flex}button{font:inherit;color:inherit;cursor:pointer}button:focus-visible{outline:4px solid var(--accent);outline-offset:4px}.choice{aspect-ratio:1/.82;background:var(--card);border:var(--line) solid var(--ink);border-radius:var(--radius-large);width:clamp(96px,15vw,150px);box-shadow:0 6px 0 var(--ink);font-size:clamp(48px,8vw,84px);font-weight:800;line-height:1;transition:translate 80ms,box-shadow 80ms;animation:.3s ease-out backwards choice-in}.choice.is-long{font-size:clamp(34px,5.6vw,60px)}.choice:nth-child(2){animation-delay:60ms}.choice:nth-child(3){animation-delay:.12s}@keyframes choice-in{0%{opacity:0;translate:0 16px}}.choice:active:not(:disabled){box-shadow:0 1px 0 var(--ink);translate:0 5px}.choice:disabled{cursor:default}.choice.is-correct{background:var(--good);color:oklch(99% 0 0)}.choice.is-wrong{background:var(--miss);opacity:.7}.icon-button,.next{border:var(--line) solid var(--ink);box-shadow:0 5px 0 var(--ink);border-radius:50%;place-items:center;display:grid}.icon-button{background:var(--card);width:68px;height:68px}.icon-button:disabled{opacity:.35;cursor:default}.icon-button svg{width:36px;fill:var(--ink)}.next{background:var(--accent);justify-self:end;width:92px;height:92px;animation:.35s ease-out next-in,1.6s ease-in-out 1.2s infinite next-nudge}.next[hidden]{display:none}.next svg{fill:oklch(99% 0 0);width:46px;margin-left:6px}@keyframes next-in{0%{scale:.3}}@keyframes next-nudge{50%{translate:6px}}@media (prefers-reduced-motion:reduce){.next{animation:none}}.cover{z-index:2;text-align:center;background:var(--paper);flex-direction:column;justify-content:center;align-items:center;gap:18px;padding:24px;display:flex;position:absolute;inset:0}.cover[hidden]{display:none}.cover h1{letter-spacing:.1em;margin:0;font-size:clamp(48px,9vw,96px);font-weight:800}.cover .lead{color:var(--ink-soft);margin:0 0 18px;font-size:clamp(20px,2.8vw,28px)}.start{letter-spacing:.12em;color:oklch(99% 0 0);background:var(--accent);border:var(--line) solid var(--ink);box-shadow:0 7px 0 var(--ink);border-radius:999px;padding:16px 64px 20px;font-size:clamp(32px,5vw,48px);font-weight:800}.start:active:not(:disabled){box-shadow:0 1px 0 var(--ink);translate:0 6px}.start:disabled{opacity:.5}.courses{grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(10px,2vw,22px);width:min(100%,880px);display:grid}.course{color:var(--ink);background:var(--card);border:var(--line) solid var(--ink);border-radius:var(--radius-large);box-shadow:0 6px 0 var(--ink);flex-direction:column;align-items:center;gap:2px;padding:18px 8px 16px;display:flex}.course:first-child{color:oklch(99% 0 0);background:var(--accent)}.course:active:not(:disabled){box-shadow:0 1px 0 var(--ink);translate:0 5px}.course:disabled{opacity:.5}.course-number{font-size:clamp(34px,5.4vw,60px);font-weight:800;line-height:1.1}.course-unit{font-size:clamp(16px,2vw,22px);font-weight:600}.status{min-height:1.4em;color:var(--ink-soft);margin:0;font-size:18px}.celebrate{background:var(--paper-deep)}.credit{right:16px;bottom:max(10px, env(safe-area-inset-bottom));color:var(--ink-soft);margin:0;font-size:13px;position:absolute}.map-open{color:var(--ink);background:var(--good);padding:10px 40px 14px;font-size:clamp(22px,3vw,30px)}.start.secondary{color:var(--ink);background:var(--card);padding:10px 40px 14px;font-size:clamp(20px,2.6vw,26px)}.map-screen{z-index:3;background:var(--paper);grid-template-rows:auto minmax(0,1fr);display:grid;position:fixed;inset:0}.map-screen[hidden],.map-select[hidden]{display:none}.map-top{padding:max(12px, env(safe-area-inset-top)) 20px 10px;align-items:center;gap:18px;display:flex}.map-title{letter-spacing:.08em;margin:0;font-size:clamp(24px,3.6vw,36px);font-weight:700}.map-stage{touch-action:none;position:relative;overflow:hidden}.map-stage canvas{width:100%;height:100%;display:block}.map-label{z-index:1;white-space:nowrap;pointer-events:none;background:var(--card);border:var(--line) solid var(--ink);border-radius:999px;padding:4px 16px 6px;font-size:clamp(20px,2.8vw,28px);font-weight:700;position:absolute;top:0;left:0}.map-select{z-index:3;position:fixed}.map-stages{grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:clamp(10px,2vw,18px);width:min(100%,980px);max-height:60vh;padding:6px 4px 12px;display:grid;overflow-y:auto}.map-stage-button{color:var(--ink);background:var(--card);border:var(--line) solid var(--ink);border-radius:var(--radius-small);box-shadow:0 5px 0 var(--ink);flex-direction:column;align-items:center;gap:4px;padding:14px 10px 12px;font-size:clamp(20px,2.6vw,26px);font-weight:700;display:flex}.map-stage-button:active{box-shadow:0 1px 0 var(--ink);translate:0 4px}.map-stage-button .map-stage-count{color:var(--ink-soft);font-size:16px;font-weight:600}.map-stage-button.is-cleared{background:color-mix(in oklch, var(--star) 45%, var(--card))}.map-screen .map-clear{padding:18px 24px max(18px, env(safe-area-inset-bottom));background:color-mix(in oklch, var(--paper-deep) 92%, transparent);border-top:var(--line) solid var(--ink);flex-flow:wrap;gap:14px 24px;inset:auto 0 0}.map-screen .map-clear h1{font-size:clamp(36px,5vw,56px)}.map-screen .map-clear .lead{margin:0}