@charset "UTF-8";
:root{--ink:#183f48;--muted:#61767a;--green:#176759;--pale:#e7f3ed;--cream:#f7f6ef;--line:#dce5df;--orange:#e9ac59;--white:#fffefb;--shadow:0 8px 28px #24443c08}
*{box-sizing:border-box}body{margin:0;background:var(--cream);color:var(--ink);font:16px/1.65 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}button,input,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer;min-height:46px;border:1px solid var(--line);border-radius:12px;padding:9px 16px;background:var(--white);color:var(--ink)}button:hover{border-color:var(--green)}button:focus-visible,a:focus-visible,textarea:focus-visible{outline:3px solid var(--orange);outline-offset:3px}button:disabled{cursor:default;opacity:.72}a{color:var(--green)}.shell{max-width:1080px;margin:auto;padding:0 28px}.topbar{padding:26px 0 20px;display:flex;justify-content:space-between;align-items:center;gap:14px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:800;font-size:21px;color:var(--ink)}.brand small{display:block;font-size:12px;letter-spacing:1px;font-weight:500;color:var(--muted)}.pill,.tag{display:inline-block;padding:5px 12px;border:1px solid var(--line);border-radius:99px;font-size:12px;background:var(--white)}.tabs{display:flex;gap:7px;padding-bottom:18px;position:sticky;top:0;background:var(--cream);z-index:5;padding-top:10px;overflow-x:auto}.tabs button{white-space:nowrap;border:none;background:transparent;font-weight:600}.tabs button.active{background:var(--ink);color:white}.tabs span:not(:empty){font-size:12px;margin-left:3px}.hero{padding:30px 34px;background:var(--ink);color:#fff;border-radius:24px;position:relative;overflow:hidden}.hero::after{content:'あ';font-size:190px;position:absolute;right:25px;bottom:-73px;color:#fff1;pointer-events:none}.eyebrow{font-size:12px;letter-spacing:2px;text-transform:uppercase;color:#b8ddcc;font-weight:700}.hero h1{font-size:30px;line-height:1.35;margin:9px 0}.hero p{margin:10px 0 0;max-width:650px;color:#d9e9e2}.day-strip{display:grid;grid-template-columns:repeat(7,1fr);gap:9px;margin:20px 0}.day-strip button{padding:10px 4px;position:relative}.day-strip button b{display:block;font-size:18px}.day-strip button small{font-size:11px}.day-strip button.selected{background:var(--pale);border:2px solid var(--green);padding:9px 3px}.dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:#b4c7bd;margin-right:5px}.dot.good{background:var(--green)}.intro{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:24px 0 12px}.intro h2{font-size:23px;margin:0}.intro p{margin:3px 0;color:var(--muted);font-size:14px}.panel{border:1px solid var(--line);background:var(--white);border-radius:20px;padding:25px;margin:16px 0;box-shadow:var(--shadow)}.panel h2,.panel h3{margin:0 0 10px;font-size:20px}.step-head{display:flex;align-items:center;gap:12px;margin-bottom:16px}.step-head h2{margin:0}.step-head small{margin-left:auto;white-space:nowrap;color:var(--muted);font-size:12px}.number{display:grid;place-items:center;background:var(--pale);color:var(--green);font-weight:800;flex:none;width:35px;height:35px;border-radius:50%}.muted{color:var(--muted);font-size:14px}.small{font-size:13px}.phrase-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.phrase{border:1px solid var(--line);padding:18px;border-radius:15px;min-width:0}.jp{font-family:"Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo",sans-serif;font-size:23px;line-height:1.8;overflow-wrap:anywhere;letter-spacing:.02em}.phrase .jp{margin:5px 0 8px}.phrase .zh{font-size:15px}.phrase .note{margin:10px 0 0;font-size:12px;color:var(--muted)}.controls{display:flex;flex-wrap:wrap;gap:7px;align-items:center;margin-top:12px}.play{background:var(--pale);border-color:transparent;color:var(--green);font-weight:700}.primary{background:var(--green);color:white;border-color:var(--green);font-weight:700}.quiet{background:transparent;color:var(--muted)}.hint{padding:8px 0;color:var(--muted);font-size:13px}.hint summary{cursor:pointer;min-height:35px;padding-top:5px}.hint .jp{font-size:18px}.rule{margin-top:14px;padding:14px 18px;border-left:3px solid var(--orange);background:#fcf5e9;border-radius:0 12px 12px 0}.challenge{border-top:1px solid var(--line);padding:14px 0}.challenge:first-of-type{border:0}.challenge p{margin:4px 0 8px}.answer{background:var(--pale);border-radius:12px;padding:12px;margin-top:8px}.choices{display:flex;gap:8px;flex-wrap:wrap}.choices button.selected{border:2px solid var(--green);background:var(--pale)}.baseline{background:#f0f5ee;padding:16px;border-radius:14px}.kana-row{display:flex;gap:9px;flex-wrap:wrap}.kana{display:flex;align-items:center;gap:10px;padding:6px 12px}.kana .jp{font-size:34px}.check{display:flex;gap:10px;align-items:flex-start;margin:14px 0;cursor:pointer}.check input{width:20px;height:20px;flex:none;margin-top:3px;accent-color:var(--green)}.quizitem{padding:18px 0;border-bottom:1px solid var(--line)}.quizitem:last-child{border:0}.quizitem h3{font-size:16px}.options{display:grid;grid-template-columns:1fr;gap:8px;margin-top:12px}.options button{text-align:left}.options .correct{border-color:var(--green);background:var(--pale)}.options .wrong{border-color:#bf7057;background:#fff0e9}.feedback{margin:10px 0 0;font-size:14px}.goodtext{color:var(--green)}.error{color:#9a4538}.completion{background:var(--pale);border:1px solid #bed7ca;padding:22px;border-radius:18px}.completion h3{margin-top:0}.route{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:22px 0}.node{border:1px solid var(--line);border-radius:18px;padding:20px;background:var(--white);text-align:left;position:relative}.node b{display:block;font-size:18px;margin:7px 0}.node small{display:block;color:var(--muted)}.node .support{font-size:13px;margin-top:14px;border-top:1px dashed var(--line);padding-top:10px}.node.wide{grid-column:1/-1;background:var(--pale)}.arrow{color:var(--muted);text-align:center;letter-spacing:4px}.legend{display:flex;gap:10px;flex-wrap:wrap;font-size:12px}.status{display:inline-block;font-size:12px;color:var(--green);background:var(--pale);padding:3px 9px;border-radius:7px}.two{display:grid;grid-template-columns:1fr 1fr;gap:16px}.metric{font-size:30px;font-weight:800}.metric small{font-size:13px;font-weight:400;color:var(--muted)}.record{padding:15px 0;border-bottom:1px solid var(--line)}.record h3{margin:0 0 5px;font-size:17px}.record p{margin:4px 0}.empty{padding:28px;text-align:center;color:var(--muted)}textarea{width:100%;min-height:100px;padding:12px;border:1px solid var(--line);border-radius:12px;background:var(--white);color:var(--ink)}.sources{font-size:13px}.sources li{margin:8px 0}footer{padding:30px 0;color:var(--muted);font-size:12px;text-align:center}#toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);max-width:90%;width:max-content;background:var(--ink);color:white;border-radius:12px;padding:12px 20px;z-index:20;box-shadow:0 5px 30px #0002;display:none}#toast.visible{display:block}.spacer{height:12px}[hidden]{display:none!important}
@media(min-width:850px){.options{grid-template-columns:1fr 1fr 1fr}.hero h1{font-size:34px}}
@media(max-width:650px){.shell{padding:0 16px}.topbar{padding-top:20px}.topbar>.pill{display:none}.hero{padding:24px}.hero h1{font-size:26px}.phrase-grid,.two{grid-template-columns:1fr}.panel{padding:19px}.route{grid-template-columns:1fr 1fr;gap:12px}.node{padding:16px}.day-strip{gap:5px}.day-strip button small{font-size:10px}.tabs{gap:0}.tabs button{padding:9px 12px;font-size:14px}.step-head small{font-size:11px}.jp{font-size:22px}.intro h2{font-size:21px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
.graph-scroll{overflow-x:auto;margin:14px -8px}.skill-graph{height:400px;position:relative;min-width:650px}.skill-graph svg{position:absolute;inset:0;width:100%;height:100%}.graph-node{position:absolute;transform:translate(-50%,-50%);width:162px;min-height:84px;padding:8px;background:var(--white);font-size:11px;box-shadow:var(--shadow)}.graph-node small{display:block;color:var(--muted);font-size:11px}.graph-node b{display:block;font-size:15px;margin:2px 0}.graph-node:last-child{background:var(--pale);border-color:#9fc8b4}