:root{--fg:#1e293b;--muted:#64748b;--line:#e2e8f0;--bg:#f4f6fb;--card:#fff;--primary:#3563e9;--primary-dark:#2647b8;--primary-soft:#eaf0ff;--accent:#f59e0b;--danger:#c2410c;--ok:#059669;--beginner:#0d9488;--intermediate:#d97706;--advanced:#7c3aed;--radius:16px;color:var(--fg);background:var(--bg);-webkit-text-size-adjust:100%;font-family:Hiragino Sans,Hiragino Kaku Gothic ProN,Noto Sans JP,Yu Gothic,sans-serif;line-height:1.75}*{box-sizing:border-box}body{margin:0}a{color:var(--primary)}h1{margin:.4em 0;font-size:1.5rem;line-height:1.45}h2{align-items:center;gap:6px;margin:0 0 .6em;font-size:1.1rem;display:flex}h3{margin:0 0 .3em;font-size:1rem}p{margin:.4em 0}.icon{vertical-align:-.2em;flex-shrink:0}.site-header{z-index:10;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);background:#ffffffeb;justify-content:space-between;align-items:center;padding:10px 16px;display:flex;position:sticky;top:0}.site-header nav{gap:14px;font-size:.95rem;display:flex}.site-header nav a{color:var(--fg);text-decoration:none}.brand{font-size:1.05rem;font-weight:800;text-decoration:none;color:var(--fg)!important}.beta{color:var(--primary);background:var(--primary-soft);vertical-align:middle;border-radius:99px;margin-left:6px;padding:1px 8px;font-size:.68rem;font-weight:600}.site-footer{color:var(--muted);flex-wrap:wrap;justify-content:center;gap:8px 16px;padding:28px 16px 120px;font-size:.8rem;display:flex}.site-footer a{color:var(--muted)}.main{max-width:520px;margin:0 auto;padding:16px}.main.wide{max-width:720px}.card{background:var(--card);border-radius:var(--radius);margin:14px 0;padding:20px 18px;box-shadow:0 1px 3px #0f172a0f}.center{text-align:center}.notice{background:var(--primary-soft);border-radius:var(--radius);margin:16px 0;padding:16px}.error{color:var(--danger)}.muted{color:var(--muted)}.small{font-size:.88rem}.tiny{font-size:.76rem}.mono{word-break:break-all;font-family:ui-monospace,monospace}.row{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.lead{color:#334155}.btn{border:1px solid var(--line);min-height:44px;color:var(--fg);cursor:pointer;background:#fff;border-radius:12px;justify-content:center;align-items:center;gap:6px;padding:10px 18px;font-family:inherit;font-size:1rem;font-weight:600;text-decoration:none;display:inline-flex}.btn:disabled{opacity:.55;cursor:default}.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 4px 14px #3563e947}.btn.primary:active:not(:disabled){background:var(--primary-dark)}.btn.big{border-radius:14px;min-height:54px;font-size:1.08rem}.btn.block{width:100%;display:flex}.btn.ghost{background:0 0;border-color:#0000}.btn.small{min-height:36px;padding:6px 10px;font-size:.88rem}.cta{flex-direction:column;gap:10px;display:flex}.sticky-cta{z-index:5;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:var(--bg);margin:16px -16px 0;position:sticky;bottom:0;box-shadow:0 -6px 16px #0f172a0f}.sticky-cta p{margin:4px 0}.hero{text-align:center;padding:28px 4px 8px}.hero h1{margin:.3em 0 .4em;font-size:1.85rem}.hero .lead{margin-bottom:20px}.pill{color:var(--primary);background:var(--primary-soft);border-radius:99px;padding:3px 12px;font-size:.8rem;font-weight:600;display:inline-block}.checklist{margin:0;padding:0;list-style:none}.checklist li{align-items:flex-start;gap:8px;padding:6px 0;display:flex}.checklist .icon{color:var(--ok);margin-top:5px}.steps{margin:0;padding:0;list-style:none}.steps li{gap:12px;padding:8px 0;display:flex}.step-no{background:var(--primary);color:#fff;border-radius:50%;flex-shrink:0;place-items:center;width:30px;height:30px;font-weight:700;display:grid}.step-title{align-items:center;gap:4px;margin:0;font-weight:700;display:flex}.level-list{gap:10px;margin:10px 0;display:grid}.level-mini{background:var(--bg);border-radius:12px;padding:10px 12px}.level-mini-head{align-items:center;gap:8px;margin:0;font-weight:700;display:flex}.faq{border-top:1px solid var(--line);padding:10px 0}.faq summary{cursor:pointer;font-weight:600;list-style:none}.faq summary:before{content:"Q. ";color:var(--primary)}.faq summary::-webkit-details-marker{display:none}.faq p{color:#334155;margin-top:6px}.rule-list{margin:0;padding:0;list-style:none}.rule{align-items:flex-start;gap:14px;margin:10px 0;display:flex}.rule-icon{background:var(--primary-soft);width:44px;height:44px;color:var(--primary);border-radius:12px;flex-shrink:0;place-items:center;display:grid}.rule-title{margin:0;font-weight:700}.tip{color:#92400e;background:#fff7e6;border-radius:12px;align-items:flex-start;gap:8px;margin:14px 0;padding:12px 14px;font-size:.92rem;display:flex}.tip .icon{margin-top:4px}.form{border-radius:var(--radius);background:#fff;flex-direction:column;gap:16px;padding:20px 18px;display:flex}.form label{flex-direction:column;gap:6px;font-size:.92rem;font-weight:600;display:flex}.form label.check{flex-direction:row;align-items:center;gap:10px;font-weight:400}.form input[type=email],.form input[type=password]{border:1px solid #cbd5e1;border-radius:12px;min-height:48px;padding:10px 12px;font-size:16px}.form input[type=checkbox]{width:20px;height:20px}.auth{max-width:440px;margin:0 auto}.level-card{--lv:var(--line);text-align:center;background:#fff;border-radius:20px;margin:12px 0;padding:30px 18px 22px;position:relative;overflow:hidden;box-shadow:0 6px 24px #0f172a14}.level-card:before{content:"";background:var(--lv);height:8px;position:absolute;top:0;left:0;right:0}.level-card.beginner{--lv:var(--beginner)}.level-card.intermediate{--lv:var(--intermediate)}.level-card.advanced{--lv:var(--advanced)}.level-label{margin:6px 0 0}.level{margin:0;font-size:3.2rem;font-weight:800;line-height:1.25}.beginner .level{color:var(--beginner)}.intermediate .level{color:var(--intermediate)}.advanced .level{color:var(--advanced)}.level-type{margin:0;font-size:1.15rem;font-weight:700}.level-summary{color:#334155;text-align:left;background:var(--bg);border-radius:12px;margin:12px 0 8px;padding:10px 12px;font-size:.93rem}.end-reason{color:var(--muted);align-items:center;gap:4px;font-size:.88rem;display:inline-flex}.end-reason.ok{color:var(--ok);font-weight:600}.ref-note{color:var(--danger);font-size:.88rem}.meter{border-bottom:1px solid var(--line);padding:10px 0}.meter:last-of-type{border-bottom:0}.meter-head{justify-content:space-between;align-items:baseline;display:flex}.meter-name{font-weight:700}.meter-value{font-size:1.25rem;font-weight:800}.meter-bar{grid-template-columns:repeat(3,1fr);gap:4px;margin:6px 0 4px;display:grid}.meter-bar span{background:var(--line);border-radius:99px;height:10px}.meter-bar span.on.beginner{background:var(--beginner)}.meter-bar span.on.intermediate{background:var(--intermediate)}.meter-bar span.on.advanced{background:var(--advanced)}.meter-foot{justify-content:space-between;align-items:center;display:flex}.chip{color:#fff;border-radius:99px;padding:0 10px;font-size:.78rem;font-weight:600;line-height:1.8;display:inline-block}.chip.beginner{background:var(--beginner)}.chip.intermediate{background:var(--intermediate)}.chip.advanced{background:var(--advanced)}.advice{background:#fff7e6}.advice h2{color:#92400e}.conditions{margin:0;padding:0;list-style:none}.conditions li{border-bottom:1px dashed var(--line);gap:10px;padding:6px 0;display:flex}.conditions li:last-child{border-bottom:0}.conditions .mark{text-align:center;width:1.2em;font-weight:700}.conditions li.met .mark{color:var(--ok)}.conditions li.unmet{color:var(--muted)}.share-row{grid-auto-columns:1fr;grid-auto-flow:column;gap:8px;display:grid}.share-x{color:#fff;background:#111;border-color:#111}.share-line{color:#fff;background:#06c755;border-color:#06c755}.model-prompt{background:var(--bg);white-space:pre-wrap;border-radius:12px;padding:12px}.review-item{border-top:1px dashed var(--line);margin-top:8px;padding-top:6px;font-size:.9rem}.review-item .good{color:var(--ok);margin:0}.review-item .improve{color:#b45309;margin:0}li.flag{color:var(--danger)}.chart{width:100%;height:auto;margin:8px 0}.legal h2{margin-top:1.5em}.table{border-collapse:collapse;width:100%;font-size:.9rem}.table th,.table td{border-bottom:1px solid var(--line);text-align:left;vertical-align:top;padding:8px 6px}.table thead th{background:var(--bg);white-space:nowrap}.table-scroll{overflow-x:auto}.test{background:var(--bg);flex-direction:column;max-width:520px;height:100dvh;margin:0 auto;display:flex}.test-bar{border-bottom:1px solid var(--line);background:#fff;align-items:center;gap:8px;padding:8px 10px;display:flex}.spacer{flex:1}.timer{font-variant-numeric:tabular-nums;background:var(--primary-soft);color:var(--primary);border-radius:99px;align-items:center;gap:4px;padding:2px 12px;font-size:1.05rem;font-weight:800;display:inline-flex}.timer.low{color:var(--danger);background:#fff1e6}.test-body{flex:1;min-height:0;display:flex}.test-side{display:none}.chat{flex-direction:column;flex:1;min-width:0;min-height:0;display:flex}.chat-log{flex:1;padding:12px;overflow-y:auto}.mission{border-radius:var(--radius);background:#fff;margin-bottom:10px;padding:14px;box-shadow:0 1px 3px #0f172a0f}.mission-label{color:var(--accent);letter-spacing:.08em;margin:0;font-size:.75rem;font-weight:700}.instruction{margin:0 0 8px;font-size:1.1rem;font-weight:800}.mission-thumb{border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:12px;width:100%;padding:0;font-family:inherit;display:block;overflow:hidden}.mission-thumb img{object-fit:cover;object-position:left top;width:100%;height:110px;display:block}.mission-thumb span{color:var(--primary);background:var(--primary-soft);padding:8px;font-size:.85rem;font-weight:600;display:block}.bubble{overflow-wrap:anywhere;border-radius:16px;min-width:0;max-width:100%;margin:10px 0;padding:10px 14px}.bubble.user{background:var(--primary);color:#fff;border-bottom-right-radius:4px;margin-left:12%}.bubble.assistant{background:#fff;border-bottom-left-radius:4px;box-shadow:0 1px 3px #0f172a0f}.bubble.guide{color:#78350f;background:#fff7e6;font-size:.92rem}.bubble.thinking{color:var(--muted);align-items:center;gap:8px;display:flex}.dots{gap:3px;display:inline-flex}.dots i{background:var(--muted);border-radius:50%;width:6px;height:6px;animation:1.2s infinite blink}.dots i:nth-child(2){animation-delay:.2s}.dots i:nth-child(3){animation-delay:.4s}@keyframes blink{0%,80%,to{opacity:.25}40%{opacity:1}}.pre{white-space:pre-wrap;margin:0}.chat-error{padding:0 12px;font-size:.9rem}.composer{padding:8px 10px calc(8px + env(safe-area-inset-bottom));border-top:1px solid var(--line);background:#fff;align-items:flex-end;gap:8px;display:flex}.composer textarea{resize:none;border:1px solid #cbd5e1;border-radius:22px;flex:1;min-height:44px;max-height:140px;padding:10px 14px;font-family:inherit;font-size:16px;line-height:1.5}.send-btn{background:var(--primary);color:#fff;cursor:pointer;border:0;border-radius:50%;flex-shrink:0;place-items:center;width:44px;height:44px;display:grid}.send-btn:disabled{cursor:default;background:#cbd5e1}.finishing{padding:18px 16px calc(18px + env(safe-area-inset-bottom));text-align:center;color:#065f46;background:#ecfdf5;font-weight:700}.md-table-wrap{max-width:100%;overflow-x:auto}.md-table{border-collapse:collapse;margin:6px 0;font-size:.85rem}.md-table th,.md-table td{border:1px solid var(--line);text-align:left;white-space:nowrap;padding:4px 8px}.md-table th{background:var(--bg)}.md-h{font-weight:700}.sample-wrap{overflow-x:auto}.sample{border:1px solid var(--line);-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;border-radius:8px;width:100%;height:auto}.sample.small{max-width:640px;margin-bottom:12px}.material{margin-top:12px}.material summary{cursor:pointer;color:var(--primary);font-weight:600}.material pre,.memo{white-space:pre-wrap;background:#fff;border-radius:12px;padding:12px;font-family:inherit;font-size:.92rem}.viewer{z-index:50;background:var(--bg);flex-direction:column;display:flex;position:fixed;inset:0}.viewer-head{border-bottom:1px solid var(--line);background:#fff;align-items:center;gap:8px;padding:10px;display:flex}.seg{background:var(--bg);border-radius:12px;flex:1;grid-template-columns:1fr 1fr;padding:3px;display:grid}.seg button{color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:10px;padding:8px 4px;font-family:inherit;font-size:.88rem;font-weight:600}.seg button.active{color:var(--fg);background:#fff;box-shadow:0 1px 3px #0f172a1f}.icon-btn{cursor:pointer;width:44px;height:44px;color:var(--fg);background:0 0;border:0;place-items:center;display:grid}.viewer-body{flex:1;padding:12px;overflow-y:auto}.viewer-scroll{-webkit-overflow-scrolling:touch;overflow-x:auto}.sample-full{border:1px solid var(--line);-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;border-radius:8px;width:820px;max-width:none;height:auto;display:block}.viewer-close{padding-bottom:env(safe-area-inset-bottom);border-radius:0;margin:0}@media (width>=960px){.test{max-width:none}.test-side{border-right:1px solid var(--line);background:#fff;width:52%;padding:16px;display:block;overflow-y:auto}.only-sm{display:none!important}.chat-log{padding:16px 24px}}