:root{font-family:system-ui,'Noto Sans JP',sans-serif;color:#112f4b;background:#e8f7fa;font-synthesis:none;--ink:#112f4b;--ocean:#087c91;--line:#b4d9df;--gold:#ffca56}
*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer;color:inherit}button:disabled{cursor:default;opacity:.65}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible,[tabindex='-1']:focus-visible{outline:3px solid #bc6500;outline-offset:4px}main{width:min(1040px,100%);margin:auto;padding:20px 20px 48px}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(1.8rem,4.5vw,2.8rem);line-height:1.3;letter-spacing:.02em}h2{font-size:1.4rem}p{line-height:1.7}a{color:#075c7b}.draft-notice{text-align:center;background:#fff2c9;border:1px solid #e9b93c;border-radius:12px;padding:8px;font-size:.9rem;margin-bottom:16px}.save-banner:empty{display:none}.save-banner{padding:12px;border:1px solid #dba345;border-radius:12px;background:#fff8dc;margin-bottom:12px}.save-banner button{margin-top:8px}.eyebrow{font-size:.9rem;color:#076175;font-weight:700;margin-bottom:6px}.intro-row{display:flex;justify-content:space-between;gap:12px;align-items:center}.intro-row h1{margin-bottom:12px}.panel{background:#fff;border:1px solid var(--line);border-radius:24px;padding:28px;box-shadow:0 8px 0 #cce8eb}.islands{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.island{display:flex;flex-direction:column;align-items:flex-start;text-align:left;gap:10px;border:2px solid var(--line);background:#fff;border-radius:22px;padding:18px;min-width:0;min-height:178px;box-shadow:0 5px 0 #c4e4e8}.island:hover{border-color:var(--ocean);transform:translateY(-2px)}.island.completed{border-color:#d9a429;background:#fff9df}.island h2{margin:0}.island-number{display:inline-grid;place-items:center;background:#e6f5f7;color:#096577;border-radius:50%;width:38px;height:38px;font-weight:700}.island small{font-size:.875rem}.meter{display:block;width:100%;height:10px;border:1px solid #80b9c3;background:#e8f4f6;border-radius:20px;overflow:hidden}.meter span{display:block;height:100%;background:#138ca0}.completed .meter span{background:#c9910b}.actions{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin:22px 0 0}.button{border:1px solid #95c5d0;border-radius:12px;background:#fff;padding:12px 18px;min-height:48px;font-weight:700}.primary{color:white;background:#086c82;border-color:#086c82;box-shadow:0 4px 0 #064957}.wide{min-width:min(280px,100%)}.subtle{background:#edf7f9}.back{margin-bottom:18px}.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:18px 0}.stat{text-align:center;border:1px solid var(--line);border-radius:14px;padding:10px;background:#f2fafb}.stat strong{display:block;font-size:1.45rem}.stat span{font-size:.875rem}.picture{display:block;width:min(320px,100%);height:auto;aspect-ratio:1;margin:8px auto;object-fit:contain;background:#fff;border-radius:18px}.word{font-size:clamp(2.1rem,7vw,3.4rem);font-weight:750;line-height:1.2;margin:12px 0 4px}.center{text-align:center}.meaning{font-size:1.3rem}.muted{color:#42616c}.question-top{display:flex;justify-content:space-between;align-items:center;gap:12px}.badge{display:inline-block;border-radius:30px;background:#e6f5f7;padding:6px 12px;font-weight:700;font-size:.9rem}.choices{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;max-width:720px;margin:18px auto 0}.choice{display:flex;align-items:center;gap:10px;min-height:64px;background:#f0f9fc;border:2px solid #a6cedb;border-radius:14px;padding:12px;font-size:clamp(1.1rem,3vw,1.6rem);font-weight:650;overflow-wrap:anywhere}.key{font-size:.85rem;display:grid;place-items:center;flex:0 0 24px;height:24px;border-radius:50%;background:#153f59;color:white}.feedback{border:2px solid #168358;background:#edf9f2;border-radius:18px;padding:22px}.feedback.again{border-color:#c88715;background:#fff8e6}.feedback h2{margin-bottom:12px}.concept{padding:20px;background:#f3f9fb;border-radius:16px;text-align:center;font-size:1.4rem}.option-row{display:flex;align-items:center;gap:10px;min-height:48px;line-height:1.6}.option-row input{width:22px;height:22px;flex-shrink:0}.deck-nav{display:flex;gap:10px;justify-content:center;margin-top:16px}.deck-nav button{flex:1;max-width:240px}.collection{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.word-card{border:1px solid var(--line);border-radius:16px;padding:12px;text-align:center;min-width:0}.word-card .picture{width:160px;max-width:100%;margin-top:0}.word-card .word{font-size:1.5rem;overflow-wrap:anywhere}.word-card p{margin:6px 0}.word-state{font-size:.9rem;font-weight:700}.celebrate{border:2px solid #d7a120;background:#fff7d8;border-radius:18px;padding:18px;margin:18px 0}.celebrate strong{display:block;font-size:1.6rem}.empty-word{display:grid;place-items:center;aspect-ratio:1;width:min(160px,100%);margin:auto;border-radius:16px;background:#eef5f6;font-size:2.5rem;color:#5d7c85}details{border-top:1px solid var(--line);margin-top:24px;padding-top:12px}summary{cursor:pointer;min-height:44px;padding:10px 0;font-weight:700}details p,details li{font-size:.95rem;line-height:1.7}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.save-banner button{min-height:44px}.status-line{font-size:.9rem;margin-top:16px}.result-list{padding-left:1.3em;line-height:1.8}.retry{margin-left:8px}
@media(min-width:768px){.collection{grid-template-columns:repeat(5,minmax(0,1fr))}.word-card .word{font-size:1.2rem}.word-card .meaning{font-size:1rem}}
@media(max-width:600px){main{padding:12px 12px 36px}.panel{padding:18px 14px;border-radius:20px}.islands{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.island{padding:14px;min-height:160px}.island h2{font-size:1.1rem}.intro-row{align-items:flex-start;flex-direction:column}.picture{width:min(260px,100%)}.choices{gap:8px}.choice{padding:9px;min-height:58px}.stats{gap:6px}.stat{padding:8px 3px}.stat strong{font-size:1.2rem}}
.islands .island{position:relative;align-items:center;gap:0;padding:0;overflow:hidden;background:#9de8e5;border-color:#80c9d0}.islands .island.completed{border-color:#d9a429}.island-art{display:block;position:relative;overflow:hidden;width:100%;max-width:220px;aspect-ratio:16/13;flex-shrink:0;pointer-events:none}.island-sprite[hidden]{display:none}.island-sprite{display:block;position:absolute;left:0;top:0;width:300%;max-width:none;height:auto;transform:translate(var(--island-x),var(--island-y));pointer-events:none;user-select:none}.islands .island-number{position:absolute;z-index:1;left:10px;top:10px;width:30px;height:30px;background:#fff;color:#075c70;font-size:.9rem;box-shadow:0 1px 3px #13475b20}.islands .completed .island-number{background:#ffdb75;color:#594000}.island-info{display:flex;flex:1;flex-direction:column;gap:8px;width:100%;min-height:104px;padding:12px 14px;background:#f8ffff;border-top:1px solid #88ced1}.completed .island-info{background:#fff8df;border-top-color:#e8c15d}.island-title{font-size:1.15rem;font-weight:700;line-height:1.5;overflow-wrap:anywhere}.island-info .meter{margin-top:auto}.island-info small{font-size:.875rem;line-height:1.5}
@media(max-width:600px){.island-info{padding:10px;gap:6px;min-height:110px}.island-title{font-size:1.05rem}.islands .island-number{width:26px;height:26px;left:6px;top:6px}}
.island-intro{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:20px;align-items:center}.island-intro-copy{min-width:0;overflow-wrap:anywhere}.island-intro-copy h1{margin-bottom:12px}.island-intro-copy p:last-child{margin-bottom:0}.island-intro-art{width:100%;max-width:220px;overflow:hidden;border-radius:20px;background:#9de8e5}
@media(max-width:600px){.island-intro{grid-template-columns:minmax(0,1fr);gap:12px}.island-intro-art{max-width:144px;justify-self:center}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.island:hover{transform:none}}
.migration-comparison{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.migration-record{border:2px solid var(--line);border-radius:18px;padding:18px;min-width:0;overflow-wrap:anywhere}.migration-record h2{font-size:1.25rem;line-height:1.5}.migration-record>.button{width:100%;margin-top:12px}.migration-islands{list-style:none;padding:0;margin:0}.migration-islands li{border-top:1px solid var(--line);padding:12px 0}.migration-islands h3{font-size:1rem;margin:0 0 8px}.migration-islands dl{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:0}.migration-islands dt{font-size:.8rem}.migration-islands dd{font-weight:700;margin:4px 0 0;line-height:1.5}.migration-confirm{border:2px solid #d7a120;border-radius:18px;background:#fff7d8;padding:20px}.migration-error{border:1px solid #c88715;border-radius:12px;background:#fff8e6;padding:14px}.migration-panel .actions{margin-bottom:4px}
@media(max-width:700px){.migration-comparison{grid-template-columns:minmax(0,1fr)}.migration-record{padding:14px}.migration-islands dl{gap:4px}}