@import"https://fonts.googleapis.com/css2?family=Zen+Maru+Gothic:wght@500;700;900&display=swap";:root{font-family:Zen Maru Gothic,sans-serif;color:var(--color-ink);background:var(--color-sky);font-synthesis:none;text-rendering:optimizeLegibility;--color-sky: oklch(96% .025 230);--color-paper: oklch(100% 0 0);--color-ink: oklch(30% .05 250);--color-line: oklch(58% .16 250);--color-line-dark: oklch(45% .15 250);--color-warm: oklch(83% .14 85);--color-focus: oklch(67% .17 50);--safe-bottom: env(safe-area-inset-bottom, 0px)}*{box-sizing:border-box}html,body,#root{min-height:100%;margin:0}body{min-width:320px;min-height:100dvh;overscroll-behavior:none;-webkit-tap-highlight-color:transparent}button,select{font:inherit}button{touch-action:manipulation}button:focus-visible,select:focus-visible{outline:4px solid var(--color-focus);outline-offset:3px}.app-shell{width:min(100%,860px);min-height:100dvh;margin:0 auto;padding:0 20px calc(104px + var(--safe-bottom))}.app-header{display:flex;align-items:center;justify-content:center;gap:10px;min-height:84px}.app-header span{font-size:2rem}h1,h2,p{margin-block-start:0}h1{margin-block-end:0;font-size:clamp(1.5rem,5vw,2.2rem);letter-spacing:.06em}.page-card{display:grid;justify-items:center;align-content:center;min-height:min(62dvh,560px);padding:clamp(28px,7vw,60px);border:4px solid color-mix(in oklch,var(--color-line) 28%,white);border-radius:34px;background:var(--color-paper);text-align:center}.page-card h2{margin-block-end:14px;font-size:clamp(2rem,8vw,3.8rem)}.page-card p{max-width:24em;font-size:clamp(1.1rem,3.5vw,1.45rem);line-height:1.8}.page-icon{font-size:clamp(4rem,16vw,7rem)}.tab-bar{position:fixed;z-index:10;right:0;bottom:0;left:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;width:min(100%,860px);margin:0 auto;padding:10px 12px calc(10px + var(--safe-bottom));border-top:3px solid color-mix(in oklch,var(--color-line) 22%,white);background:color-mix(in oklch,var(--color-paper) 94%,transparent);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.tab-button{display:grid;place-items:center;min-height:64px;padding:6px 2px;border:0;border-radius:18px;color:var(--color-ink);background:transparent;font-weight:900}.tab-button span{font-size:1.5rem}.tab-button[aria-current=page]{color:var(--color-paper);background:var(--color-line)}.start-overlay{position:fixed;z-index:100;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;padding:24px;background:color-mix(in oklch,var(--color-sky) 92%,white)}.start-button,.chunky-button{min-height:56px;border:0;border-radius:22px;color:var(--color-paper);background:var(--color-line);box-shadow:0 7px 0 var(--color-line-dark);font-weight:900;cursor:pointer}.start-button{display:grid;justify-items:center;gap:12px;padding:24px 36px;font-size:clamp(1.3rem,5vw,2rem)}.start-button span{font-size:4rem}.start-button:active,.chunky-button:active{transform:translateY(5px);box-shadow:0 2px 0 var(--color-line-dark)}.menu-card{align-content:start}.line-label{display:grid;gap:8px;width:min(100%,380px);margin-block-end:24px;font-size:1.1rem;font-weight:700}.line-label select{min-height:52px;padding-inline:14px;border:3px solid var(--color-line);border-radius:16px;color:var(--color-ink);background:var(--color-paper)}.chunky-button{min-width:180px;margin-block-end:28px;padding:10px 24px}.notice{margin-block-end:6px;font-size:.85rem!important}.route-preview{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;max-width:520px}.station-dot{width:24px;height:24px;border:5px solid var(--color-line);border-radius:50%;background:var(--color-paper)}.quiz-page,.map-page{position:relative;min-height:min(70dvh,650px);padding:clamp(18px,4vw,34px);border:4px solid color-mix(in oklch,var(--color-line) 28%,white);border-radius:34px;background:var(--color-paper);text-align:center}.quiz-page h2,.map-page h2{margin-block-end:8px;font-size:clamp(1.7rem,6vw,2.7rem)}.quiz-prompt{margin-block-end:14px;font-size:clamp(1.05rem,3vw,1.35rem);font-weight:700}.station-sign{position:relative;display:grid;place-items:center;width:min(100%,620px);min-height:190px;margin:0 auto 22px;padding:22px 24px 34px;overflow:hidden;border:5px solid var(--color-ink);border-radius:24px;color:var(--color-ink);background:var(--color-paper)}.station-sign-button{cursor:pointer;box-shadow:0 7px color-mix(in oklch,var(--color-ink) 60%,white)}.station-sign-button:active{transform:translateY(4px);box-shadow:0 3px color-mix(in oklch,var(--color-ink) 60%,white)}.station-kanji{font-size:clamp(3.2rem,14vw,7rem);font-weight:900;line-height:1.05;letter-spacing:.08em}.station-kana{margin-top:8px;font-size:clamp(1.3rem,5vw,2.2rem);font-weight:900}.station-romaji{font-size:clamp(.9rem,3vw,1.2rem);letter-spacing:.08em}.station-neighbors{display:flex;justify-content:space-between;width:100%;margin-top:12px;color:color-mix(in oklch,var(--color-ink) 76%,white);font-weight:700}.station-line{position:absolute;right:0;bottom:0;left:0;height:18px;background:var(--color-line)}.replay-hint{margin-top:10px;font-size:.9rem;font-weight:700}.announce-button{display:grid;grid-template-columns:auto auto;place-content:center;gap:12px;width:min(100%,440px);min-height:150px;margin:22px auto 34px;border:0;border-radius:30px;color:var(--color-paper);background:var(--color-line);box-shadow:0 8px 0 var(--color-line-dark);font-size:clamp(1.3rem,5vw,2rem);font-weight:900}.announce-button span{font-size:2.5rem}.answer-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(8px,2.5vw,18px);width:min(100%,680px);margin:0 auto 72px}.answer-button{min-height:82px;padding:10px 6px;border:4px solid var(--color-line);border-radius:22px;color:var(--color-ink);background:var(--color-paper);box-shadow:0 7px color-mix(in oklch,var(--color-line) 72%,black);font-size:clamp(1.05rem,4vw,1.75rem);font-weight:900}.answer-button:active{transform:translateY(5px);box-shadow:0 2px color-mix(in oklch,var(--color-line) 72%,black)}.answer-hint{animation:gentle-hint .65s ease-in-out 2;border-color:var(--color-warm)}.try-again,.result-message,.stamp-message,.unlock-message{font-weight:900}.try-again{min-height:32px;margin-block-end:8px;color:color-mix(in oklch,var(--color-focus) 80%,var(--color-ink))}.celebration{display:grid;place-items:center;min-height:540px;cursor:pointer}.result-message{margin-block-end:12px;color:var(--color-line-dark);font-size:clamp(1.8rem,7vw,3.2rem)}.confetti{position:absolute;inset:18px 0 auto;font-size:clamp(2rem,8vw,4rem);animation:confetti-fall 1.1s ease-in-out infinite alternate;pointer-events:none}.hanamaru{display:none;font-size:4rem}.stamp-message{padding:8px 18px;border-radius:999px;background:color-mix(in oklch,var(--color-warm) 45%,white)}.unlock-message{margin-block-start:8px;padding:8px 18px;border-radius:999px;background:color-mix(in oklch,var(--color-line) 22%,white)}.skip-hint{margin-bottom:64px;font-size:.9rem}.train-route{position:absolute;right:24px;bottom:20px;left:24px;height:44px;overflow:hidden}.track{position:absolute;right:0;bottom:9px;left:0;height:8px;border-block:2px solid var(--color-ink);background:repeating-linear-gradient(90deg,transparent 0 18px,var(--color-ink) 18px 22px)}.train{position:absolute;bottom:10px;left:min(calc(var(--train-step) * 12%),88%);font-size:2rem;transition:left .85s ease-in-out}.map-summary{font-size:1.2rem;font-weight:900}.route-map{display:grid;gap:22px;text-align:left}.route-map h3{margin:0 0 10px;font-size:1rem}.main-route,.branch-route,.branch-routes{min-width:0}.main-route,.branch-route{padding:14px;border-radius:20px;background:color-mix(in oklch,var(--color-sky) 55%,white)}.map-stations{display:flex;gap:0;padding:14px 6px 8px;overflow-x:auto}.map-station{position:relative;display:grid;flex:0 0 86px;justify-items:center;gap:6px;min-height:72px;text-align:center}.map-station:before{position:absolute;top:14px;right:50%;left:-50%;height:7px;background:var(--color-line);content:""}.map-station:first-child:before{display:none}.map-dot{z-index:1;display:grid;place-items:center;width:36px;height:36px;border:6px solid var(--color-line);border-radius:50%;background:var(--color-paper);font-size:.9rem}.map-name{font-size:.78rem;font-weight:700}.is-locked{opacity:.28}.is-stamped .map-dot{color:var(--color-paper);background:var(--color-warm)}.branch-routes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.branch-from{font-size:.78rem}@keyframes gentle-hint{25%{transform:rotate(-2deg) scale(1.02)}75%{transform:rotate(2deg) scale(1.02)}}@keyframes confetti-fall{0%{transform:translateY(-8px) rotate(-4deg);opacity:.8}to{transform:translateY(14px) rotate(4deg);opacity:1}}@media(max-width:520px){.app-shell{padding-inline:12px}.tab-button{font-size:.76rem}.answer-grid,.branch-routes{grid-template-columns:1fr}.answer-button{min-height:60px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}.confetti{display:none}.hanamaru{display:block}}