:root{--bg:#f4f5fb;--card:#fff;--fg:#1b1d2e;--mut:#6a6f8f;--pri:#4f46e5;--pri2:#7c3aed;--ok:#16a34a;--warn:#f59e0b;--bad:#ef4444;--bd:#e4e6f2;--sh:0 6px 24px rgba(40,40,100,.08);--tab:64px;color-scheme:light}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#0e1017;--card:#181b27;--fg:#eef0fa;--mut:#9ba1c4;--bd:#272b40;--sh:0 6px 24px rgba(0,0,0,.35);color-scheme:dark}}
:root[data-theme=dark]{--bg:#0e1017;--card:#181b27;--fg:#eef0fa;--mut:#9ba1c4;--bd:#272b40;--sh:0 6px 24px rgba(0,0,0,.35);color-scheme:dark}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{font-size:calc(16px * var(--fs,1))}
html,body{margin:0}
body{background:var(--bg);color:var(--fg);font:1rem/1.45 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
[hidden]{display:none!important}
h1{margin:0;font-size:26px;letter-spacing:-.02em}
h2{font-size:12px;color:var(--mut);margin:22px 0 8px;text-transform:uppercase;letter-spacing:.08em;display:flex;justify-content:space-between}
button{font:inherit;color:inherit;background:var(--card);border:1px solid var(--bd);border-radius:14px;padding:10px 14px;cursor:pointer;transition:transform .12s,background .2s,box-shadow .2s}
button:active{transform:scale(.97)}
.screen{max-width:760px;margin:0 auto;padding:18px 16px calc(var(--tab) + 28px + env(safe-area-inset-bottom));animation:fade .25s}
@keyframes fade{from{opacity:0;transform:translateY(6px)}}

/* hero */
.hero{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:20px;border-radius:24px;color:#fff;background:linear-gradient(135deg,var(--pri),var(--pri2));box-shadow:0 12px 32px rgba(79,70,229,.35)}
.hello{opacity:.85;font-size:14px}
.chips-row{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}
.pill{background:rgba(255,255,255,.2);border:0;color:#fff;border-radius:99px;padding:5px 12px;font-size:14px}
.pill.link{cursor:pointer}
.ring{position:relative;width:104px;height:104px;flex:none}
.ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring .t{position:absolute;inset:0;display:grid;place-content:center;text-align:center;font-weight:700;font-size:22px;line-height:1.1}
.ring .t small{font-size:11px;font-weight:500;opacity:.85}

/* controls */
.seg{display:flex;gap:6px;background:var(--card);padding:5px;border-radius:16px;border:1px solid var(--bd)}
.seg button{flex:1;border:0;background:transparent;padding:9px 4px;border-radius:12px;font-weight:600}
.seg button small{display:block;font-weight:400;font-size:11px;color:var(--mut)}
.seg button.on{background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff;box-shadow:0 4px 12px rgba(79,70,229,.35)}
.seg button.on small{color:#e0defc}
.pick{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.pick button{display:flex;align-items:center;gap:10px;text-align:left;padding:10px;border-radius:18px;border:2px solid var(--bd)}
.pick button svg{width:56px;height:56px;flex:none}
.pick button.on{border-color:var(--pri);box-shadow:0 0 0 4px rgba(79,70,229,.15)}
.pick small{display:block;color:var(--mut);font-size:12px}
input[type=range]{width:100%;accent-color:var(--pri)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px}
.grid button{text-align:left;padding:14px;border-radius:18px;box-shadow:var(--sh);font-weight:600;min-height:100px}
.grid button:hover{transform:translateY(-2px)}
.grid .ic{font-size:30px;display:block;margin-bottom:6px}

/* panels */
.panel{background:var(--card);border:1px solid var(--bd);border-radius:20px;padding:16px;box-shadow:var(--sh);margin-top:14px}
.panel.big{text-align:center;padding:22px}
.panel-t{font-size:13px;color:var(--mut);margin-bottom:10px}
.primary{background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff;border:0;font-weight:700;padding:13px 22px;border-radius:16px;box-shadow:0 6px 18px rgba(79,70,229,.35)}
.wide{width:100%;margin-top:14px}
.ghost{background:transparent;border:0}
.danger{color:var(--bad);margin-top:24px}
.hint{color:var(--mut);font-size:13px;margin:6px 2px}
.bars{display:flex;align-items:flex-end;gap:8px;height:130px}
.bars div{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;font-size:11px;color:var(--mut)}
.bars i{display:block;width:100%;max-width:34px;border-radius:8px 8px 4px 4px;background:var(--bd);min-height:4px;transition:height .5s}
.bars i.met{background:linear-gradient(var(--pri2),var(--pri))}
.bars i.part{background:#a5b4fc}
.tiles{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.tile{background:var(--card);border:1px solid var(--bd);border-radius:18px;padding:14px;box-shadow:var(--sh)}
.tile b{display:block;font-size:24px}.tile span{color:var(--mut);font-size:13px}

/* cards */
.cardrow{display:flex;align-items:center;gap:10px;background:var(--card);border:1px solid var(--bd);border-radius:14px;padding:10px 12px;margin-bottom:8px}
.cardrow .tx{flex:1;min-width:0}.cardrow .tx small{display:block;color:var(--mut)}
.dots{display:flex;gap:3px}.dots i{width:6px;height:6px;border-radius:50%;background:var(--bd)}.dots i.f{background:var(--ok)}
.cardrow .x{padding:2px 8px;border:0;background:transparent;color:var(--mut)}
.bar{display:flex;align-items:center;gap:10px;font-weight:600}.bar>div:not(.pts){flex:1;min-width:0}
#title .t1{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#title small{display:block;font-weight:400;color:var(--mut);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#chat .pts{white-space:nowrap;font-size:12px}
.flash{margin-top:18px;min-height:260px;background:var(--card);border:1px solid var(--bd);border-radius:26px;box-shadow:var(--sh);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:24px;text-align:center;animation:fade .25s}
.flash .en{font-size:30px;font-weight:700;letter-spacing:-.02em}
.flash .tr{font-size:22px;color:var(--pri)}
.flash .note{font-size:14px;color:var(--mut)}
.grades{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:14px}
.grades button{font-weight:700;padding:14px 4px;border:0;color:#fff}
.g0{background:var(--bad)}.g1{background:var(--warn)}.g2{background:var(--ok)}

/* tabs */
#tabs{position:fixed;left:0;right:0;bottom:0;height:calc(var(--tab) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:flex;background:color-mix(in srgb,var(--card) 88%,transparent);backdrop-filter:blur(14px);border-top:1px solid var(--bd);z-index:5}
#tabs button{flex:1;border:0;background:transparent;border-radius:0;font-size:12px;color:var(--mut);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;position:relative}
#tabs svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
#tabs button.on{color:var(--pri);font-weight:700}
#dueDot{position:absolute;top:8px;left:calc(50% + 8px);width:9px;height:9px;border-radius:50%;background:var(--bad)}

#toast{position:fixed;top:calc(14px + env(safe-area-inset-top));left:50%;transform:translateX(-50%);background:#111827;color:#fff;padding:10px 18px;border-radius:99px;z-index:20;box-shadow:0 8px 24px rgba(0,0,0,.3);animation:drop .35s;max-width:90vw;font-size:14px;text-align:center}
@keyframes drop{from{transform:translate(-50%,-30px);opacity:0}}

/* chat */
#chat{display:flex;flex-direction:column;height:100dvh;padding-bottom:0}
#chat .pts{font-size:13px;color:var(--mut);font-weight:500}
#stage{display:flex;justify-content:center;gap:20px;padding:6px 0 2px}
.bot{text-align:center;font-size:12px;color:var(--mut);width:116px;line-height:1.25}
.bot svg{width:92px;height:92px;filter:drop-shadow(0 6px 10px rgba(79,70,229,.25))}
.bot b{color:var(--fg);font-size:14px}
.bot .mouth{transform-box:fill-box;transform-origin:center}
.bot .eye{transform-box:fill-box;transform-origin:center;animation:blink 4s infinite}
.bot.talking .mouth{animation:talk .2s infinite alternate}
.bot.talking svg{animation:bob .45s infinite alternate}
.bot.talking b::after{content:" 🔊"}
@keyframes talk{to{transform:scaleY(3)}}
@keyframes bob{to{transform:translateY(-3px)}}
@keyframes blink{0%,94%,100%{transform:scaleY(1)}97%{transform:scaleY(.1)}}
#log{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:10px;padding:8px 2px;scroll-behavior:smooth}
#log>*{animation:pop .25s}
@keyframes pop{from{opacity:0;transform:translateY(8px) scale(.97)}}
.msg{max-width:86%;padding:10px 14px;border-radius:18px 18px 18px 6px;background:var(--card);border:1px solid var(--bd);box-shadow:var(--sh)}
.msg.me{align-self:flex-end;border-radius:18px 18px 6px 18px;background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff;border:0}
.msg .who{font-size:12px;color:var(--mut);margin-bottom:2px}
.msg .tr{display:none;color:var(--mut);font-size:14px;margin-top:6px;padding-top:6px;border-top:1px dashed var(--bd)}
.msg.showtr .tr,.alltr .msg .tr{display:block}
.msg.me .tr{color:#e0defc;border-top-color:rgba(255,255,255,.3)}
.msg.me .acts button{background:rgba(255,255,255,.18);border-color:transparent;color:#fff}
#log .msg.me:not(.hastr) .acts{display:none}
.ghost.on{color:var(--pri);font-weight:800;background:rgba(79,70,229,.12);border-radius:12px}
.msg .acts{margin-top:8px;display:flex;gap:6px}
.msg .acts button{padding:2px 10px;font-size:13px;border-radius:99px}
.fix{align-self:flex-end;max-width:86%;font-size:14px;padding:10px 14px;border-radius:14px;background:#fffbeb;color:#78350f;border:1px solid #fcd34d}
.fix b{color:var(--ok)}.fix s{color:var(--bad)}
.ok,.score{align-self:flex-end;font-size:13px;color:var(--ok)}.score{color:var(--mut)}
.tip{align-self:center;font-size:13px;color:var(--mut);background:var(--card);border:1px dashed var(--bd);border-radius:14px;padding:6px 12px;text-align:center}
.typing{align-self:flex-start;display:flex;gap:5px;padding:14px 16px;background:var(--card);border:1px solid var(--bd);border-radius:18px}
.typing i{width:8px;height:8px;border-radius:50%;background:var(--mut);animation:dot 1s infinite}
.typing i:nth-child(2){animation-delay:.15s}.typing i:nth-child(3){animation-delay:.3s}
@keyframes dot{50%{transform:translateY(-5px);opacity:.4}}
#live{min-height:24px;color:var(--pri);font-style:italic;padding:2px 6px;font-size:15px}
footer{display:flex;gap:8px;align-items:center;padding:8px 0 calc(10px + env(safe-area-inset-bottom))}
footer input{flex:1;min-width:0;padding:12px 16px;border-radius:99px;border:1px solid var(--bd);background:var(--card);color:var(--fg);font:inherit}
.round{width:46px;height:46px;border-radius:50%;padding:0;display:grid;place-items:center;flex:none}
.mic{background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff;border:0;width:52px;height:52px}
.mic.rec{background:var(--bad);animation:pulse 1.1s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(239,68,68,.5)}100%{box-shadow:0 0 0 16px rgba(239,68,68,0)}}
/* interpreter */
#interp{display:flex;flex-direction:column;height:100dvh;padding-bottom:calc(var(--tab) + 12px + env(safe-area-inset-bottom))}
.ihead{display:flex;align-items:center;gap:6px}.ihead h1{flex:1}
.langpair{display:flex;align-items:flex-end;gap:8px;margin:10px 0}
.langpair label{flex:1;font-size:12px;color:var(--mut);text-transform:uppercase;letter-spacing:.06em;min-width:0}
.langpair select{width:100%;margin-top:4px;padding:11px;border-radius:12px;border:1px solid var(--bd);background:var(--card);color:var(--fg);font:1rem system-ui;text-transform:none;letter-spacing:0}
#iLog{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:10px;padding:4px 2px;scroll-behavior:smooth}
#iLog>*{animation:pop .25s}
#iLog .msg{max-width:90%}
#iLog .orig{font-size:13px;opacity:.75;margin-bottom:3px}
#iLog .out{font-size:1.18rem;font-weight:600;line-height:1.35}
#iLog .msg.me .orig{color:#e0defc;opacity:1}
#iLog .msg .acts{margin-top:6px}
#iLive{min-height:22px;color:var(--pri);font-style:italic;padding:2px 6px}
.ibar{display:flex;gap:6px;margin:4px 0}
.ibar input{flex:1;min-width:0;padding:11px 14px;border-radius:99px;border:1px solid var(--bd);background:var(--card);color:var(--fg);font:inherit}
.isend{border-radius:99px;padding:8px 12px;font-weight:700;white-space:nowrap}
.isend.b{background:var(--card)}
.imics{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.imic{display:flex;flex-direction:column;align-items:center;gap:2px;padding:14px 8px;border:0;border-radius:20px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--pri),var(--pri2));box-shadow:0 6px 18px rgba(79,70,229,.35)}
.imic.b{background:linear-gradient(135deg,#0ea5e9,#6366f1);box-shadow:0 6px 18px rgba(14,165,233,.3)}
.imic span{font-size:26px}.imic small{font-weight:400;opacity:.9}
.imic.rec{background:var(--bad);animation:pulse 1.1s infinite}

/* settings / sheets */
.gear{position:absolute;top:10px;right:10px;background:rgba(255,255,255,.2);border:0;border-radius:50%;width:38px;height:38px;padding:0;font-size:18px}
.hero{position:relative}
#sheet{position:fixed;inset:0;z-index:30;display:flex;align-items:flex-end;justify-content:center}
#sheet .back{position:absolute;inset:0;background:rgba(10,12,30,.55);animation:fadeb .2s}
@keyframes fadeb{from{opacity:0}}
.sbody{position:relative;width:100%;max-width:560px;max-height:88dvh;overflow-y:auto;background:var(--bg);border-radius:26px 26px 0 0;padding:18px 18px calc(20px + env(safe-area-inset-bottom));animation:slide .28s}
@keyframes slide{from{transform:translateY(40px);opacity:0}}
.sbody h3{margin:0 0 4px;font-size:20px}
.sbody select{width:100%;padding:11px;border-radius:12px;border:1px solid var(--bd);background:var(--card);color:var(--fg);font:inherit}
.sbody h2:first-of-type{margin-top:12px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips button{border-radius:99px}
.badge{font-size:11px;font-weight:600;padding:2px 8px;border-radius:99px;background:var(--card);border:1px solid var(--bd);color:var(--mut)}
.rooms button{background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff;border:0;min-height:90px}
.rooms button:nth-child(2){background:linear-gradient(135deg,#0ea5e9,#6366f1)}
.rooms button:nth-child(3){background:linear-gradient(135deg,#ec4899,#f43f5e)}
.rooms button:nth-child(4){background:linear-gradient(135deg,#f59e0b,#ef4444)}
.rooms button:nth-child(5){background:linear-gradient(135deg,#10b981,#0ea5e9)}
h2 span{text-transform:none;letter-spacing:0;font-weight:400}
.drill{align-self:flex-end;max-width:92%;background:var(--card);border:1px solid var(--bd);border-radius:16px;padding:10px 14px;box-shadow:var(--sh)}
.drill .ds{font-weight:700;margin-bottom:4px}
.drill small{color:var(--mut)}
.w-ok{color:var(--ok);font-weight:600}
.w-bad{color:var(--bad);font-weight:700;text-decoration:underline wavy;cursor:pointer}
.sum-list{margin:6px 0 0;padding-left:18px;font-size:14px}
.sum-list s{color:var(--bad)}.sum-list b{color:var(--ok)}
.next{margin-top:14px;padding:12px 14px;border-radius:16px;background:linear-gradient(135deg,rgba(79,70,229,.12),rgba(124,58,237,.12));font-weight:600}
@media(min-width:760px){#tabs{max-width:760px;left:50%;transform:translateX(-50%);border-radius:20px 20px 0 0;border:1px solid var(--bd)}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}