*{box-sizing:border-box;margin:0}:root{--bg:#faf8f4;--card:#fff;--ink:#2b2926;--muted:#8a857c;--line:#e8e3da;--accent:#b5541c;--accent-soft:#f6e8de;--ok:#3d7a4a;--warn:#a33d3d}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--ink);font:17px/1.65 -apple-system,PingFang SC,Hiragino Sans GB,Noto Sans SC,sans-serif}.app{max-width:980px;margin:0 auto;padding:0 20px 80px}.topbar{border-bottom:1px solid var(--line);align-items:baseline;gap:28px;margin-bottom:24px;padding:22px 4px 14px;display:flex}.brand{letter-spacing:.5px;color:var(--accent);font-size:22px;font-weight:700}.tabs{gap:6px;display:flex}.tab{color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:10px;min-height:44px;padding:8px 16px;font-size:17px}.tab.active{background:var(--accent-soft);color:var(--accent);font-weight:600}.card{background:var(--card);border:1px solid var(--line);border-radius:14px;margin-bottom:14px;padding:18px 20px}h2{margin-bottom:10px;font-size:19px}h3{margin-bottom:6px;font-size:17px}.muted{color:var(--muted);font-size:15px}.row{flex-wrap:wrap;align-items:center;gap:10px;display:flex}button.primary{background:var(--accent);color:#fff;cursor:pointer;border:0;border-radius:12px;min-height:46px;padding:12px 22px;font-size:17px}button.primary:disabled{opacity:.45}button.ghost{border:1px solid var(--line);cursor:pointer;color:var(--ink);background:0 0;border-radius:10px;min-height:40px;padding:8px 14px;font-size:15px}button.ghost.on{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}textarea,input[type=text]{border:1px solid var(--line);width:100%;font:inherit;background:#fff;border-radius:12px;padding:12px 14px}textarea:focus,input:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}.badge{background:var(--accent-soft);color:var(--accent);border-radius:20px;padding:2px 10px;font-size:13px;display:inline-block}.badge.tier-internalize{color:var(--ok);background:#e7f0e9}.badge.tier-use{color:#3a5f8a;background:#e8eef6}.badge.tier-index{color:#7a6f55;background:#f0ede6}.badge.tier-skip{color:var(--warn);background:#f3e9e9}.spin{border:2px solid var(--line);border-top-color:var(--accent);border-radius:50%;width:18px;height:18px;animation:1s linear infinite sp;display:inline-block}@keyframes sp{to{transform:rotate(360deg)}}.error{color:var(--warn);font-size:15px}@media (width<=640px){body{font-size:16px}.app{padding:0 12px 60px}.topbar{flex-wrap:wrap;gap:14px}.tabs{flex-wrap:wrap}}.chatwrap{flex-direction:column;min-height:calc(100vh - 140px);display:flex}.chathead{z-index:5;background:var(--bg);padding-top:6px;position:sticky;top:0}.chatlog{flex:1;padding-bottom:12px;overflow-y:auto}.bubble{white-space:pre-wrap;word-break:break-word;border-radius:16px;max-width:82%;margin:8px 0;padding:12px 16px}.bubble.coach{background:var(--card);border:1px solid var(--line);border-bottom-left-radius:4px}.bubble.me{background:var(--accent-soft);border-bottom-right-radius:4px;margin-left:auto}.inputbar{background:var(--bg);align-items:flex-end;gap:10px;padding:10px 0 16px;display:flex;position:sticky;bottom:0}.inputbar textarea{resize:none;flex:1}.md .md-h{margin:10px 0 4px;font-weight:700}.md .md-gap{height:10px}.md .md-quote{border-left:3px solid var(--accent);color:var(--muted);margin:6px 0;padding-left:10px}.md ul{margin:6px 0;padding-left:22px}.md code{background:var(--accent-soft);border-radius:5px;padding:1px 6px;font-size:15px}.md .md-pre{background:var(--bg);border:1px solid var(--line);border-radius:10px;margin:8px 0;padding:10px 12px;font-size:14px;line-height:1.5;overflow-x:auto}.md .md-pre code{background:0 0;padding:0}.sketch{border:1.5px dashed var(--accent);background:#fffdf9;border-radius:12px;margin:10px 0;padding:12px 14px}.sketch-title{color:var(--accent);margin-bottom:8px;font-weight:700}.sketch-flow{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.sketch-node{border:1.5px solid var(--accent);background:#fff;border-radius:10px;padding:4px 12px;font-size:15px;display:inline-block}.sketch-node.sketch-root{background:var(--accent-soft);font-weight:600}.sketch-arrow{color:var(--accent);font-weight:700}.sketch-cols{flex-wrap:wrap;gap:10px;display:flex}.sketch-col{border:1px solid var(--line);background:#fff;border-radius:10px;flex:1;min-width:140px;padding:8px 10px}.sketch-colhead{border-bottom:1px solid var(--line);color:var(--accent);margin-bottom:6px;padding-bottom:4px;font-weight:600}.sketch-col ul{margin:4px 0;padding-left:18px;font-size:14px}.gear{color:var(--muted);cursor:pointer;background:0 0;border:0;min-height:44px;margin-left:auto;font-size:20px}.concept-art{object-fit:cover;border:1px solid var(--line);background:var(--accent-soft);border-radius:12px;flex-shrink:0}.ttsbtn{min-height:26px;color:var(--muted);margin:-4px 0 6px 2px;padding:1px 10px;font-size:13px}.finch .breath,.finch .headg,.finch .wing,.finch .eye{transform-box:fill-box;transform-origin:50%}.finch .breath{transform-origin:50% 90%;animation:3.4s ease-in-out infinite fBreath}.finch .eye{animation:4.5s infinite fBlink}.finch.thinking .headg{animation:1.8s ease-in-out infinite fTilt}.finch.celebrate{animation:.5s ease-out 3 fHop}.finch.celebrate .wing{animation:.28s ease-in-out 5 fFlap}.finch.sing .headg{animation:1.2s ease-in-out infinite fTilt}.finch.oops .headg{animation:.5s ease-in-out 2 fShake}.finch.heal .breath{transform-origin:50% 90%;animation:1.4s ease-in-out infinite fBreath}.finch .fnote,.finch .fspark{opacity:0;fill:var(--accent)}.finch.sing .fnote{animation:1.3s ease-out infinite fRise}.finch.sing .fnote.n2{animation-delay:.5s}.finch.heal .fspark{fill:var(--ok);animation:1.4s ease-out infinite fRise}.finch.heal .fspark.s2{animation-delay:.6s}@keyframes fBreath{50%{transform:scale(1.03,.97)}}@keyframes fBlink{0%,92%,to{transform:scaleY(1)}95%{transform:scaleY(.1)}}@keyframes fTilt{50%{transform:rotate(-11deg)}}@keyframes fShake{25%{transform:rotate(-9deg)}75%{transform:rotate(9deg)}}@keyframes fHop{30%{transform:translateY(-7px)}65%{transform:translateY(0)}}@keyframes fFlap{50%{transform:rotate(26deg)}}@keyframes fRise{0%{opacity:.9;transform:translateY(0)}to{opacity:0;transform:translateY(-10px)}}.confetti{pointer-events:none;z-index:99;position:fixed;inset:0;overflow:hidden}.confetti i{border-radius:3px;width:8px;height:12px;animation:linear forwards cFall;position:absolute;top:-12px}@keyframes cFall{to{opacity:.85;transform:translateY(105vh)rotate(540deg)}}.fx-stamp{text-align:center;border:2.5px solid;border-radius:50%;width:34px;height:34px;margin:4px 0;font-size:20px;font-weight:700;line-height:32px;animation:.35s cubic-bezier(.2,1.6,.4,1) stampIn;display:inline-block;transform:rotate(-8deg)}.fx-stamp.right{color:var(--ok);background:#e7f0e9}.fx-stamp.wrong{color:var(--warn);background:#f3e9e9}@keyframes stampIn{0%{opacity:0;transform:scale(1.7)rotate(-8deg)}to{opacity:1;transform:scale(1)rotate(-8deg)}}.quiz-card{border:1.5px solid var(--accent);background:#fffdf9;border-radius:12px;margin:8px 0;padding:10px 12px}.quiz-q{margin-bottom:8px;font-weight:600}.quiz-opt{text-align:left;border:1px solid var(--line);cursor:pointer;width:100%;min-height:44px;color:var(--ink);background:#fff;border-radius:10px;margin:6px 0;padding:10px 14px;font-size:16px;display:block}.quiz-opt:not(:disabled):active{background:var(--accent-soft);border-color:var(--accent)}.quiz-opt:disabled{cursor:default;opacity:.6}.quiz-dots{align-items:center;gap:5px;display:inline-flex}.quiz-dots i{background:var(--line);border-radius:50%;width:8px;height:8px}.quiz-dots i.on{background:var(--accent)}.dots{align-items:center;gap:4px;padding:4px 2px;display:inline-flex}.dots i{background:var(--accent);opacity:.4;border-radius:50%;width:7px;height:7px;animation:1.1s ease-in-out infinite dotHop}.dots i:nth-child(2){animation-delay:.18s}.dots i:nth-child(3){animation-delay:.36s}@keyframes dotHop{30%{opacity:1;transform:translateY(-5px)}}.bubble{animation:.24s ease-out bubIn}@keyframes bubIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.sort-chip{border:1px solid var(--line);text-overflow:ellipsis;white-space:nowrap;vertical-align:middle;background:#fff;border-radius:8px;max-width:220px;margin:3px 4px;padding:3px 10px;font-size:14px;transition:opacity .35s,transform .35s;display:inline-block;overflow:hidden}.sort-chip.landed{opacity:0;transform:translateY(42px)scale(.5)}.sort-bin{text-align:center;border:1.5px dashed var(--line);border-radius:12px;flex:1;min-width:0;padding:10px 4px 8px}.sort-bin-head{font-size:14px;font-weight:600}.sort-bin-count{margin-top:2px;font-size:24px;font-weight:700}.sort-bin.tier-internalize{border-color:var(--ok);color:var(--ok);background:#e7f0e9}.sort-bin.tier-use{color:#3a5f8a;background:#e8eef6;border-color:#3a5f8a}.sort-bin.tier-index{color:#7a6f55;background:#f0ede6;border-color:#7a6f55}.sort-bin.tier-skip{border-color:var(--warn);color:var(--warn);background:#f3e9e9}.recap-video{border:1px solid var(--line);background:#000;border-radius:14px;width:100%;max-width:560px;margin:4px auto 12px;display:block}.recap-overlay{background:var(--bg);z-index:90;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.recap-close{z-index:2;position:absolute;top:18px;right:18px}.recap-slide{width:90%;max-width:640px;animation:.4s ease-out recapIn}@keyframes recapIn{0%{opacity:0;transform:scale(.94)}to{opacity:1;transform:scale(1)}}.recap-center{text-align:center;flex-direction:column;align-items:center;gap:14px;display:flex}.recap-center h1{font-size:30px}.recap-sub{color:var(--muted)}.recap-big{color:var(--accent);font-size:96px;font-weight:800;line-height:1;animation:.5s cubic-bezier(.2,1.6,.4,1) recapPop}@keyframes recapPop{0%{opacity:0;transform:scale(.3)}}.recap-cal{gap:10px;display:flex}.recap-cal span{border:1.5px dashed var(--line);width:44px;height:44px;color:var(--muted);opacity:0;border-radius:12px;justify-content:center;align-items:center;font-weight:600;animation:.35s ease-out forwards calIn;display:flex}.recap-cal span.on{background:var(--accent);border-color:var(--accent);color:#fff;border-style:solid}@keyframes calIn{0%{opacity:0;transform:scale(.4)}to{opacity:1;transform:scale(1)}}.recap-mk{gap:26px;display:flex}.recap-mk em{color:var(--accent);font-size:44px;font-style:normal;font-weight:800;display:block}.recap-strike{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.recap-strike span{border:1px solid var(--ok);color:var(--ok);opacity:0;border-radius:8px;padding:4px 12px;text-decoration:line-through;animation:.35s ease-out forwards calIn}.recap-quote{border-left:3px solid var(--accent);color:var(--ink);background:var(--accent-soft);border-radius:0 10px 10px 0;padding:6px 14px;font-size:20px}.recap-progress{gap:7px;display:flex;position:absolute;bottom:26px}.recap-progress i{background:var(--line);border-radius:50%;width:9px;height:9px}.recap-progress i.on{background:var(--accent)}.flow-overlay{z-index:80;background:var(--bg);-webkit-overflow-scrolling:touch;padding:max(8px, env(safe-area-inset-top)) max(14px, env(safe-area-inset-right)) max(8px, env(safe-area-inset-bottom)) max(14px, env(safe-area-inset-left));position:fixed;inset:0;overflow-y:auto}.flow-inner{max-width:760px;margin:0 auto}.flow-overlay .chatwrap{height:calc(100vh - 16px);min-height:0;height:calc(100dvh - max(8px, env(safe-area-inset-top)) - max(8px, env(safe-area-inset-bottom)))}.flow-stage{animation:.26s ease-out flowIn}@keyframes flowIn{0%{opacity:0;transform:translate(48px)}to{opacity:1;transform:none}}.swipe-card{touch-action:pan-y;-webkit-user-select:none;user-select:none}.swipe-hint{text-align:center;color:var(--muted);margin-top:8px;font-size:13px}.float-strip{gap:8px;margin:10px 0 2px;display:flex}.float-strip i{background:var(--accent-soft);border:1px solid var(--line);border-radius:5px;width:26px;height:16px;animation:1.6s ease-in-out infinite fFloat}.float-strip i:nth-child(2){animation-delay:.2s}.float-strip i:nth-child(3){animation-delay:.4s}.float-strip i:nth-child(4){animation-delay:.6s}@keyframes fFloat{50%{transform:translateY(-7px)}}@media (prefers-reduced-motion:reduce){.finch,.finch *,.confetti i,.float-strip i,.sort-chip,.fx-stamp,.grade-stamp,.bubble,.dots i,.recap-slide,.recap-slide *,.flow-stage,.swipe-card{transition:none!important;animation:none!important}.confetti{display:none}}.bucket{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;min-height:120px;padding:16px 8px;display:flex}.ball{background:var(--accent-soft);color:var(--accent);border:1px solid var(--line);white-space:nowrap;border-radius:999px;transition:opacity .3s;display:inline-block}.drawn{background:var(--bg);border:1px dashed var(--line);border-radius:10px;margin-top:8px;padding:10px 14px}.grade-stamp{border:3px solid;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:58px;height:58px;font-size:30px;font-weight:800;animation:.35s cubic-bezier(.2,1.6,.4,1) stampIn;display:inline-flex;transform:rotate(-8deg)}.grade-stamp.gS{color:#a07800;background:#fdf3d7}.grade-stamp.gA{color:var(--ok);background:#e7f0e9}.grade-stamp.gB{color:#8a6d3b;background:#f6efe3}.grade-stamp.gC{color:var(--warn);background:#f3e9e9}.score-line{margin:4px 0;font-size:15px}.score-line.ok{color:var(--ok)}