:root{--bg: #f5f4f0;--surface: #ffffff;--text: #1d1f23;--muted: #666b73;--line: #e3e1da;--accent: #1f5f8b;--accent-soft: #e6eff6;--good: #1f7a4d;--good-soft: #e5f3ea;--bad: #b3261e;--bad-soft: #fbe9e7;--radius: 14px;--tabs-h: 64px;color-scheme:light dark}@media(prefers-color-scheme:dark){:root{--bg: #131416;--surface: #1d1f23;--text: #ececec;--muted: #9ba1a9;--line: #2e3137;--accent: #6fb1e0;--accent-soft: #1c2c39;--good: #6cc796;--good-soft: #17291f;--bad: #f08b82;--bad-soft: #351b19}}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--text);font:16px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent}[hidden]{display:none!important}h1,h2,h3{margin:0;line-height:1.25}h1{font-size:26px}h2{font-size:20px}h3{font-size:16px}p{margin:0}button,input,textarea,select{font:inherit;color:inherit}button{cursor:pointer;border:0;background:none}button:disabled{opacity:.5;cursor:default}input,textarea,select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:var(--surface);font-size:16px}textarea{resize:vertical}input:focus,textarea:focus,select:focus{outline:2px solid var(--accent);outline-offset:-1px}.app main{max-width:640px;margin:0 auto;padding:calc(16px + env(safe-area-inset-top)) 16px calc(var(--tabs-h) + 24px + env(safe-area-inset-bottom))}.stack{display:flex;flex-direction:column;gap:14px}.stack-s{display:flex;flex-direction:column;gap:10px}.row{display:flex;gap:10px;align-items:center}.between{justify-content:space-between}.grow{flex:1}.card{display:flex;flex-direction:column;gap:8px;padding:14px 16px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);text-align:left}.card.pick:active{background:var(--accent-soft)}.card.accent{background:var(--accent-soft);border-color:transparent}.card.good{background:var(--good-soft);border-color:transparent}.card.hero .big{font-size:40px;font-weight:700}.section-title{margin-top:6px;font-size:13px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted)}.summary{font-size:18px;font-weight:600}.muted{color:var(--muted)}.small{font-size:14px}.logic{padding:10px 12px;border-radius:10px;background:var(--accent-soft);font-size:15px}.start{align-self:flex-start}.literal{padding:6px 10px;border-radius:8px;background:var(--bad-soft)}.center{text-align:center}.clamp{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.prewrap{white-space:pre-wrap}.error{color:var(--bad)}.good-text{color:var(--good)}.bad-text{color:var(--bad)}.focus{font-style:italic}.example{font-style:italic;color:var(--muted)}.big-text{font-size:18px}.chip{align-self:flex-start;padding:2px 10px;font-size:12px;border-radius:999px;background:var(--accent-soft);color:var(--accent)}.wrong{padding:6px 10px;border-radius:8px;background:var(--bad-soft);text-decoration:line-through;text-decoration-color:color-mix(in srgb,var(--bad) 60%,transparent)}.drill .wrong{text-decoration:none}.right{padding:6px 10px;border-radius:8px;background:var(--good-soft)}.primary,.secondary{padding:13px 18px;border-radius:12px;font-weight:600}.primary{background:var(--accent);color:var(--surface)}.secondary{background:var(--surface);border:1px solid var(--line)}.ghost{padding:6px 12px;border-radius:8px;border:1px solid var(--line)}.ghost.small{font-size:14px}.link{padding:6px 0;color:var(--accent);font-weight:500}.link.danger{color:var(--bad)}.segmented{display:flex;gap:4px;padding:4px;background:var(--bg);border-radius:10px}.segmented button{flex:1;padding:8px 4px;border-radius:8px;font-size:14px;color:var(--muted)}.segmented button.on{background:var(--surface);color:var(--text);font-weight:600;box-shadow:0 1px 2px #00000014}.field{display:flex;flex-direction:column;gap:6px;font-size:14px;color:var(--muted)}.editor{min-height:42vh;line-height:1.55}.brief p[lang=en]{font-size:15px}.bar{height:8px;border-radius:4px;background:var(--bg);overflow:hidden}.bar span{display:block;height:100%;background:var(--accent);border-radius:4px}.bar.prev span{background:var(--line)}.chat{display:flex;flex-direction:column;gap:10px}.bubble{position:relative;max-width:86%;padding:10px 14px;border-radius:16px}.bubble.them{align-self:flex-start;background:var(--surface);border:1px solid var(--line);padding-right:40px}.bubble.me{align-self:flex-end;background:var(--accent-soft)}.bubble.typing{color:var(--muted);padding-right:14px}.replay{position:absolute;right:8px;top:8px;width:26px;height:26px;border-radius:50%;font-size:11px;color:var(--accent);background:var(--accent-soft)}.replay svg{display:block;width:10px;height:10px;margin:auto;fill:currentColor}.replay.loading{animation:pulse 1s ease-in-out infinite}.replay.inline{position:static;vertical-align:middle}.composer{position:sticky;bottom:calc(var(--tabs-h) + env(safe-area-inset-bottom));display:flex;flex-direction:column;gap:8px;padding:12px 0 4px;background:var(--bg);border-top:1px solid var(--line)}.mic{padding:22px;border-radius:18px;font-size:17px;font-weight:600;background:var(--accent);color:var(--surface)}.mic.live{background:var(--bad);animation:pulse 1.4s ease-in-out infinite}@keyframes pulse{50%{opacity:.75}}details summary{cursor:pointer;font-weight:600}details p{margin-top:8px}.tabs{position:fixed;left:0;right:0;bottom:0;display:flex;height:calc(var(--tabs-h) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--surface);border-top:1px solid var(--line)}.tabs button{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:12px;color:var(--muted)}.tabs button.on{color:var(--accent);font-weight:600}.tabs .icon{font-size:20px;line-height:1}.login{max-width:360px;margin:0 auto;padding:calc(20vh + env(safe-area-inset-top)) 16px 0}.splash{min-height:100vh}.row>.card{align-self:stretch}