:root{--bg: #0b1120;--bg-soft: #111c33;--surface: rgba(255, 255, 255, .05);--surface-2: rgba(255, 255, 255, .09);--border: rgba(255, 255, 255, .11);--text: #eef2ff;--muted: #97a3c0;--primary: #f43f5e;--primary-soft: rgba(244, 63, 94, .16);--accent: #38bdf8;--accent-soft: rgba(56, 189, 248, .15);--success: #34d399;--warn: #fbbf24;--danger: #f87171;--radius: 16px;--radius-sm: 10px;--shadow: 0 18px 40px -20px rgba(0, 0, 0, .8);--jp: "Noto Sans JP", system-ui, sans-serif;--ui: "Inter", system-ui, -apple-system, sans-serif}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;padding:0;min-height:100%}body{background:radial-gradient(1000px 600px at 15% -10%,rgba(244,63,94,.18),transparent 60%),radial-gradient(900px 500px at 100% 0%,rgba(56,189,248,.16),transparent 55%),var(--bg);background-attachment:fixed;color:var(--text);font-family:var(--ui);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}button{font-family:inherit;font-size:inherit;cursor:pointer;border:none;background:none;color:inherit}input,select,textarea{font-family:inherit;font-size:inherit}.jp{font-family:var(--jp)}#app{max-width:1040px;margin:0 auto;padding:20px 16px 96px}.app-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:6px 0 22px;flex-wrap:wrap}.brand{display:flex;align-items:center;gap:12px}.brand-mark{width:44px;height:44px;border-radius:13px;background:linear-gradient(140deg,var(--primary),#fb7185);display:grid;place-items:center;font-family:var(--jp);font-size:24px;font-weight:700;color:#fff;box-shadow:var(--shadow)}.brand-text h1{margin:0;font-size:21px;letter-spacing:-.02em}.brand-text p{margin:0;font-size:13px;color:var(--muted)}.header-actions{display:flex;gap:10px;align-items:center}.streak-pill{display:flex;align-items:center;gap:6px;background:var(--surface);border:1px solid var(--border);border-radius:999px;padding:7px 13px;font-size:13px;font-weight:600;color:var(--warn)}.nav{display:flex;gap:8px;background:var(--surface);border:1px solid var(--border);padding:6px;border-radius:999px;margin-bottom:24px;overflow-x:auto;scrollbar-width:none}.nav::-webkit-scrollbar{display:none}.nav button{flex:1;min-width:max-content;padding:11px 16px;border-radius:999px;font-weight:600;font-size:14px;color:var(--muted);transition:.18s}.nav button:hover{color:var(--text);background:var(--surface-2)}.nav button.active{background:linear-gradient(135deg,var(--primary),#fb7185);color:#fff;box-shadow:0 8px 20px -10px #f43f5ee6}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;margin-bottom:18px}.panel h2{margin:0 0 4px;font-size:19px;letter-spacing:-.01em}.panel .sub{margin:0 0 18px;color:var(--muted);font-size:14px}.hero{display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center}.hero-stats{display:flex;gap:10px;flex-wrap:wrap}.stat-box{background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 16px;min-width:92px}.stat-box b{display:block;font-size:22px;letter-spacing:-.02em}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;border-radius:999px;font-weight:600;font-size:14px;background:var(--surface-2);border:1px solid var(--border);transition:.16s}.btn:hover{background:#ffffff24;transform:translateY(-1px)}.btn:active{transform:translateY(0)}.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}.btn-primary{background:linear-gradient(135deg,var(--primary),#fb7185);border-color:transparent;color:#fff;box-shadow:0 10px 24px -12px #f43f5ee6}.btn-primary:hover{background:linear-gradient(135deg,#e11d48,#f43f5e)}.btn-accent{background:var(--accent-soft);border-color:#38bdf859;color:var(--accent)}.btn-lg{padding:14px 26px;font-size:16px}.btn-icon{width:40px;height:40px;padding:0;border-radius:50%;font-size:17px}.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}.topic-card{background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;text-align:left;transition:.18s;position:relative;overflow:hidden}.topic-card:hover{border-color:#f43f5e80;transform:translateY(-2px)}.topic-card.active{border-color:var(--primary);background:var(--primary-soft)}.topic-card .emoji{font-size:24px;display:block;margin-bottom:8px}.topic-card b{display:block;font-size:15px}.topic-card small{color:var(--muted);font-size:12px}.topic-progress{margin-top:10px;height:5px;border-radius:999px;background:#ffffff17;overflow:hidden}.topic-progress i{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--accent));border-radius:999px}.badge{display:inline-block;font-size:10px;font-weight:700;letter-spacing:.06em;padding:2px 7px;border-radius:5px;background:var(--accent-soft);color:var(--accent);vertical-align:middle}.badge.learned{background:#34d39926;color:var(--success)}.flashcard-wrap{perspective:1400px;margin-bottom:20px}.flashcard{position:relative;width:100%;min-height:300px;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.4,.2,.2,1);cursor:pointer}.flashcard.flipped{transform:rotateY(180deg)}.flashcard-face{position:absolute;inset:0;backface-visibility:hidden;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-soft);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:30px;text-align:center}.flashcard-face.back{transform:rotateY(180deg);background:linear-gradient(150deg,#131f38,#0f1a30)}.flashcard-word{font-family:var(--jp);font-size:clamp(30px,8vw,46px);font-weight:700;letter-spacing:.02em}.flashcard-romaji{color:var(--accent);font-size:17px;font-weight:500}.flashcard-meaning{font-size:21px;font-weight:600}.hint-text{color:var(--muted);font-size:13px}.rating-row{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.rating-btn{padding:13px 8px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);font-weight:600;font-size:14px;transition:.15s;display:flex;flex-direction:column;gap:2px;align-items:center}.rating-btn small{font-size:11px;font-weight:500;color:var(--muted)}.rating-btn:hover{transform:translateY(-2px)}.rating-btn.again:hover{background:#f871712e;border-color:var(--danger)}.rating-btn.hard:hover{background:#fbbf2426;border-color:var(--warn)}.rating-btn.good:hover{background:#38bdf826;border-color:var(--accent)}.rating-btn.easy:hover{background:#34d39926;border-color:var(--success)}.chat-layout{display:grid;grid-template-columns:260px 1fr;gap:16px;align-items:start}.chat-messages{display:flex;flex-direction:column;gap:14px;height:min(58vh,520px);overflow-y:auto;padding:4px;scrollbar-width:thin}.msg{max-width:84%;padding:13px 16px;border-radius:16px;font-size:15px;white-space:pre-wrap;word-break:break-word}.msg.jp-part{font-family:var(--jp)}.msg.user{align-self:flex-end;background:linear-gradient(135deg,var(--primary),#fb7185);color:#fff;border-bottom-right-radius:5px}.msg.bot{align-self:flex-start;background:var(--bg-soft);border:1px solid var(--border);border-bottom-left-radius:5px}.msg .msg-meta{display:flex;gap:8px;margin-top:9px;padding-top:8px;border-top:1px solid var(--border);align-items:center}.msg .speak-btn{font-size:12px;padding:4px 10px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-weight:600}.chat-input-row{display:flex;gap:10px;margin-top:14px;align-items:flex-end}.chat-input-row textarea{flex:1;resize:none;min-height:48px;max-height:140px;padding:13px 16px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-soft);color:var(--text);outline:none;line-height:1.5}.chat-input-row textarea:focus{border-color:var(--accent)}.chat-suggestions{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.chip{padding:7px 13px;border-radius:999px;background:var(--surface);border:1px solid var(--border);font-size:13px;color:var(--muted);transition:.15s}.chip:hover{color:var(--text);border-color:var(--accent)}.topic-list-side{display:flex;flex-direction:column;gap:6px}.topic-list-side button{text-align:left;padding:10px 12px;border-radius:var(--radius-sm);font-size:14px;color:var(--muted);border:1px solid transparent}.topic-list-side button:hover{background:var(--surface);color:var(--text)}.topic-list-side button.active{background:var(--primary-soft);border-color:#f43f5e66;color:var(--text)}.typing{display:inline-flex;gap:4px;align-items:center}.typing i{width:6px;height:6px;border-radius:50%;background:var(--muted);animation:blink 1.3s infinite}.typing i:nth-child(2){animation-delay:.18s}.typing i:nth-child(3){animation-delay:.36s}@keyframes blink{0%,60%,to{opacity:.25}30%{opacity:1}}.quiz-progress{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin-bottom:10px}.bar{height:6px;border-radius:999px;background:#ffffff17;overflow:hidden;margin-bottom:22px}.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--accent));transition:width .35s}.quiz-question{font-family:var(--jp);font-size:clamp(22px,5.5vw,32px);font-weight:700;text-align:center;margin-bottom:26px;line-height:1.4}.options{display:grid;gap:10px}.option{padding:14px 18px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-soft);text-align:left;font-size:15px;transition:.15s}.option:hover:not(:disabled){border-color:var(--accent);transform:translate(3px)}.option.correct{background:#34d3992e;border-color:var(--success);color:var(--success);font-weight:600}.option.wrong{background:#f8717129;border-color:var(--danger);color:var(--danger)}.option:disabled{cursor:default}.feedback{margin-top:18px;padding:14px 18px;border-radius:var(--radius-sm);background:var(--bg-soft);border-left:3px solid var(--accent);font-size:14px}.result-big{font-size:46px;font-weight:800;text-align:center;letter-spacing:-.03em}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}.field label{font-size:13px;font-weight:600;color:var(--muted)}.field input,.field select{padding:11px 14px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-soft);color:var(--text);outline:none}.field input:focus,.field select:focus{border-color:var(--accent)}.switch-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:13px 0;border-bottom:1px solid var(--border)}.switch-row:last-child{border-bottom:none}.switch{width:46px;height:26px;border-radius:999px;background:#ffffff29;position:relative;transition:.2s;flex-shrink:0}.switch:after{content:"";position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:#fff;transition:.2s}.switch.on{background:var(--primary)}.switch.on:after{transform:translate(20px)}.empty{text-align:center;padding:50px 20px;color:var(--muted)}.empty .big{font-size:44px;margin-bottom:12px}.toast{position:fixed;bottom:22px;left:50%;transform:translate(-50%);background:var(--bg-soft);border:1px solid var(--border);padding:12px 20px;border-radius:999px;font-size:14px;box-shadow:var(--shadow);z-index:90}.toast.error{border-color:var(--danger);color:var(--danger)}.toast.sticky{display:flex;align-items:center;gap:14px;max-width:min(520px,calc(100vw - 32px));padding:14px 16px 14px 20px;line-height:1.45}.toast-close{flex-shrink:0;width:26px;height:26px;border-radius:50%;background:var(--surface-2);font-size:13px}.toast-close:hover{background:#fff3}.path-step{display:flex;align-items:center;gap:14px;width:100%;padding:14px 12px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-soft);text-align:left;margin-bottom:10px;transition:.16s}.path-step:hover{border-color:var(--accent);transform:translate(3px)}.path-step:last-child{margin-bottom:0}.path-step.done{border-color:#34d39966;background:#34d39912}.path-num{flex-shrink:0;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;font-size:13px;font-weight:700;background:var(--surface-2);color:var(--muted)}.path-step.done .path-num{background:#34d39933;color:var(--success)}.path-icon{flex-shrink:0;width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:22px;background:var(--primary-soft)}.path-body{flex:1;min-width:0}.path-body b{display:block;font-size:15px}.path-body small{color:var(--muted);font-size:12.5px}.path-bar{display:block;margin-top:7px;height:4px;border-radius:999px;background:#ffffff1a;overflow:hidden}.path-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--accent))}.blank{display:inline-block;min-width:1.1em;height:1em;vertical-align:-.12em;margin:0 2px;border-bottom:3px solid var(--accent);border-radius:2px}.quiz-word{text-align:center;font-size:clamp(30px,7vw,44px);font-weight:600;letter-spacing:.04em;margin:4px 0 22px;color:var(--text)}.kana-row{display:flex;align-items:center;gap:8px;padding:6px 0;border-bottom:1px solid var(--border);overflow-x:auto;scrollbar-width:none}.kana-row:last-child{border-bottom:none}.kana-row::-webkit-scrollbar{display:none}.kana-row-label{flex-shrink:0;width:34px;font-size:12px;color:var(--muted);text-transform:uppercase;font-weight:700}.kana-cell{flex-shrink:0;width:62px;padding:10px 4px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-soft);display:flex;flex-direction:column;align-items:center;gap:2px;transition:.15s}.kana-cell:hover{border-color:var(--accent);transform:translateY(-2px)}.kana-glyph{font-size:28px;line-height:1.1}.kana-roman{font-size:11px;color:var(--muted)}.kana-choices{display:grid;grid-template-columns:repeat(auto-fill,minmax(68px,1fr));gap:8px}.kana-choice{padding:10px 6px 12px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-soft);transition:.15s;display:flex;flex-direction:column;align-items:center;gap:2px}.kana-choice-glyph{font-size:26px;line-height:1.1}.kana-choice-roman{font-size:12px;font-weight:600;letter-spacing:.03em;color:var(--accent);opacity:0;transition:opacity .2s;min-height:15px}.kana-choices.revealed .kana-choice-roman{opacity:1}.kana-choice.correct .kana-choice-roman,.kana-choice.wrong .kana-choice-roman{color:inherit}.kana-choice:hover:not(:disabled){border-color:var(--accent);transform:translateY(-2px)}.kana-choice.correct{background:#34d3992e;border-color:var(--success);color:var(--success)}.kana-choice.wrong{background:#f8717129;border-color:var(--danger);color:var(--danger)}.number-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:10px}.number-cell{padding:14px 8px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-soft);display:flex;flex-direction:column;align-items:center;gap:2px;transition:.15s}.number-cell:hover{border-color:var(--accent);transform:translateY(-2px)}.number-kanji{font-size:30px;font-weight:600;line-height:1.1}.number-value{font-size:12px;color:var(--muted)}.number-reading{font-size:12px;color:var(--accent)}.simple-list{display:flex;flex-direction:column}.simple-row{display:flex;align-items:center;gap:12px;padding:13px 4px;border-bottom:1px solid var(--border);text-align:left;transition:.14s}.simple-row:hover{background:var(--surface);padding-left:10px}.simple-row:last-child{border-bottom:none}.topic-card.done{border-color:#34d39973}.voice-banner{background:#f871711f;border:1px solid rgba(248,113,113,.4);border-left:3px solid var(--danger);border-radius:var(--radius-sm);padding:14px 18px;margin-bottom:18px;font-size:14px;line-height:1.6;color:var(--text)}.voice-banner.warn{background:#fbbf241f;border-color:#fbbf2466;border-left-color:var(--warn)}.voice-banner b{display:block;margin-bottom:4px}.voice-banner .cmd{display:inline-block;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:12.5px;background:#0006;border:1px solid var(--border);border-radius:6px;padding:3px 8px;margin:4px 2px;color:#c7d2fe;word-break:break-all;user-select:all}@media (max-width: 760px){.chat-layout,.hero{grid-template-columns:1fr}.nav button{padding:10px 13px;font-size:13px}.msg{max-width:92%}#app{padding:14px 12px 90px}.rating-row{grid-template-columns:repeat(2,1fr)}}.ai-notice{margin-top:16px;padding:16px;border-radius:12px;border:1px solid var(--border);background:var(--surface-2, rgba(255, 255, 255, .05));display:flex;flex-direction:column;gap:10px;align-items:flex-start;font-size:14px;line-height:1.6}.ai-notice-hint{color:var(--muted);font-size:13px}.tabbar{display:flex;gap:8px;overflow-x:auto;padding:0 0 14px;margin-bottom:14px;scrollbar-width:none}.tabbar::-webkit-scrollbar{display:none}.tab{flex:0 0 auto;padding:9px 16px;border-radius:999px;border:1px solid var(--border);background:transparent;color:var(--muted);font-size:14px;font-weight:600;cursor:pointer;white-space:nowrap;transition:all .15s ease}.tab:hover{color:var(--text);border-color:var(--accent)}.tab.active{background:var(--accent);border-color:var(--accent);color:#fff}.simple-list{display:flex;flex-direction:column;gap:8px;margin-top:12px}.simple-row{display:flex;align-items:center;gap:12px;width:100%;padding:12px 14px;border-radius:12px;border:1px solid var(--border);background:var(--surface-2, rgba(255, 255, 255, .04));color:var(--text);text-align:left;font-size:15px;cursor:pointer;transition:all .15s ease}button.simple-row{cursor:pointer}.simple-row:hover:not(:disabled){border-color:var(--accent)}.simple-row.option{justify-content:center}.simple-row.option .jp{font-weight:600}.simple-row.correct{border-color:var(--success);background:#22c55e1f}.simple-row.wrong{border-color:var(--danger);background:#ef44441f}.simple-row.dim{opacity:.45}.simple-row:disabled{cursor:default}.progress-row{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin-bottom:14px}.big-score{font-size:46px;font-weight:800;text-align:center;margin:12px 0 4px;color:var(--accent)}.center-panel{text-align:center}.center-panel .hero-stats{justify-content:center}.hero-stats{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.btn-lg{padding:14px 26px;font-size:16px;flex:1 1 auto}.btn-lg:disabled{opacity:.5;cursor:not-allowed}.chat-suggestions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.chip{padding:7px 13px;border-radius:999px;border:1px solid var(--border);background:transparent;color:var(--muted);font-size:13px;cursor:pointer}.chip:hover{border-color:var(--accent);color:var(--text)}.stat-box{text-align:center;padding:12px 18px;border-radius:12px;background:var(--surface-2, rgba(255, 255, 255, .04));border:1px solid var(--border)}.stat-box b{display:block;font-size:22px;color:var(--accent)}.stat-box span{font-size:12px;color:var(--muted)}textarea{width:100%;resize:vertical;font-family:inherit;font-size:16px;line-height:1.6}