:root{--bg:#0b1020;--card:#151c31;--card-2:#1b2340;--line:#2a3458;--line-soft:#222b48;--ink:#eef2ff;--muted:#9aa5c9;--leaf:#3ddc84;--leaf-dark:#22c06b;--bark:#c48a5a;--sun:#ffc93c;--sky:#3fb8ff;--rose:#ff6b85;--violet:#8b7bff;--tilo:#143326;--child:#2f2a16;--gold-bg:#3a2f12;--ok-bg:#14301f;--no-bg:#3a1a22;--warn-bg:#352a12;--over-bg:#3d1b24;--blue-bg:#1a2746;--blue-bg-hover:#22325c;--on-bright:#06130b;--radius:18px;--shadow:0 8px 28px #00000059;--glow:0 0 0 1px #3fb8ff38, 0 0 24px #3fb8ff24;--glow-leaf:0 0 0 1px #3ddc8440, 0 0 22px #3ddc8429;color:var(--ink);background-color:var(--bg);background-image:radial-gradient(90% 70% at 15% -15%,#3fb8ff38,#3fb8ff12 45%,#3fb8ff00 100%),radial-gradient(75% 60% at 100% -10%,#8b7bff33,#8b7bff0f 45%,#8b7bff00 100%);background-repeat:no-repeat;font-family:Nunito,Segoe UI,system-ui,-apple-system,BlinkMacSystemFont,Roboto,Noto Sans,Ubuntu,Cantarell,Helvetica 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.name{background:linear-gradient(90deg, var(--leaf), var(--sky));-webkit-text-fill-color:transparent;color:var(--leaf);-webkit-background-clip:text;background-clip:text}.topbar h1 .v{letter-spacing:.08em;color:var(--sky);border:1px solid var(--sky);text-shadow:0 0 8px #3fb8ff99;border-radius:999px;padding:.08em .55em;font-size:.62em;font-weight:800;box-shadow:0 0 10px #3fb8ff59}.topbar .spacer{flex:1}.pill{background:var(--card-2);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:999px;align-items:center;gap:6px;padding:.35em .9em;font-size:.95rem;font-weight:700;display:inline-flex}.pill.warn{background:var(--warn-bg);border-color:var(--sun)}.pill.over{background:var(--over-bg);border-color:var(--rose)}.home{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:22px;margin-top:20px;display:grid}.bigcard{box-shadow:var(--shadow);text-align:left;color:var(--ink);border:1px solid var(--line);background:linear-gradient(160deg,#1b2443,#121931);border-radius:26px;flex-direction:column;gap:8px;min-height:200px;padding:30px 26px;transition:transform .12s,box-shadow .15s,border-color .15s;display:flex}a.bigcard{box-sizing:border-box;text-decoration:none}.bigcard:hover{border-color:var(--sky);box-shadow:var(--glow), var(--shadow);transform:translateY(-2px)}.bigcard .emoji{filter:drop-shadow(0 0 10px #3fb8ff59);font-size:3.2rem}.bigcard .title{font-size:1.5rem;font-weight:800}.bigcard .sub{color:var(--muted);font-weight:600}.greeting{border-radius:var(--radius);background:linear-gradient(135deg,#3ddc842e,#3fb8ff1f);border:1px solid #3ddc8459;align-items:center;gap:16px;padding:18px 22px;font-size:1.15rem;display:flex}.greeting .tree{filter:drop-shadow(0 0 12px #3ddc848c);font-size:3rem}.footer{justify-content:center;margin-top:auto;padding-top:30px;display:flex}.chips{flex-wrap:wrap;gap:10px;display:flex}.chip{background:var(--card-2);color:var(--ink);border:2px solid var(--line);border-radius:999px;padding:.45em 1em;font-weight:700}.chip:hover{border-color:var(--leaf);box-shadow:var(--glow-leaf)}.chip.on{background:var(--leaf);color:var(--on-bright);border-color:var(--leaf)}.chat{flex-direction:column;flex:1;gap:14px;display:flex}.messages{flex-direction:column;flex:1;gap:12px;min-height:40vh;max-height:62vh;padding:6px 2px;display:flex;overflow-y:auto}.msg{white-space:pre-wrap;max-width:82%;box-shadow:var(--shadow);word-wrap:break-word;overflow-wrap:break-word;border-radius:20px;min-width:0;padding:12px 18px;line-height:1.5}.msg.assistant{background:var(--tilo);border:1px solid #3ddc8447;border-bottom-left-radius:6px;align-self:flex-start}.msg.user{background:var(--child);border:1px solid #ffc93c47;border-bottom-right-radius:6px;align-self:flex-end}.msg pre{white-space:pre;margin:.5em 0}.msg .speak{float:right;color:var(--muted);background:0 0;margin-left:8px;padding:.1em .4em;font-size:.9em}.composer{background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:22px;align-items:flex-end;gap:10px;padding:10px;display:flex}.composer textarea{resize:none;background:0 0;border:none;flex:1;min-height:52px;max-height:160px;font-size:1.1rem}.composer textarea:focus{box-shadow:none;outline:none}.mic{background:var(--sky);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:58px;height:58px;padding:0;font-size:1.5rem;display:flex}.mic.on{background:var(--rose);color:#fff;animation:1s infinite pulse}.send{border-radius:50%;justify-content:center;align-items:center;width:58px;height:58px;padding:0;font-size:1.4rem;display:flex}.photo-btn{background:var(--sun);color:var(--on-bright)}.board-btn{background:var(--bark);color:#fff}.msg .drawing{box-shadow:0 0 0 2px var(--line);background:#fff;border-radius:12px;margin:.5em 0;padding:8px}.msg .drawing 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var(--line);border-radius:50%;justify-content:center;align-items:center;padding:0;font-size:1.1rem;display:flex}.swatch.on{box-shadow:0 0 0 3px var(--sky), 0 0 12px #3fb8ff99;transform:scale(1.1)}.swatch.eraser{background:#f6f4ee}.board-paper{width:100%}.board-canvas{border:2px solid var(--line);cursor:crosshair;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;background:#fff;border-radius:14px;display:block}.board-actions{justify-content:flex-end;gap:10px;display:flex}.send-board{padding:.7em 1.6em;font-size:1.15rem}.msg .photo{cursor:zoom-in;border-radius:12px;max-width:100%;max-height:260px;margin-bottom:8px;display:block}.msg .photo.big{cursor:zoom-out;max-height:none}.photo-missing{color:var(--muted);font-size:.9em}.photo-preview{background:var(--child);border-radius:var(--radius);box-shadow:var(--shadow);align-items:center;gap:12px;padding:8px 12px;display:flex}.photo-preview img{object-fit:cover;border-radius:10px;width:72px;height:72px}.photo-preview 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agenda-pop{0%{transform:scale(.96)}50%{transform:scale(1.03)}to{transform:scale(1)}}.history{background:var(--card);box-shadow:var(--shadow);border:1px solid var(--line);border-radius:22px}.history.open{border-color:var(--violet);box-shadow:0 0 0 1px #8b7bff40, 0 0 24px #8b7bff24, var(--shadow)}.history-body{-webkit-overflow-scrolling:touch;flex-direction:column;gap:14px;max-height:40vh;padding:0 14px 14px;display:flex;overflow-y:auto}.history-day{flex-direction:column;flex-shrink:0;gap:8px;display:flex}.history-daylabel{color:var(--leaf);text-transform:capitalize;font-size:.95rem;font-weight:800}.history-session{text-align:left;background:var(--card-2);width:100%;color:var(--ink);border:2px solid var(--line);border-radius:16px;flex-wrap:wrap;align-items:center;gap:6px 12px;padding:10px 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.6em}.practice{flex-direction:column;gap:18px;display:flex}.topics{grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px;display:grid}.topic{background:var(--card);border-radius:var(--radius);text-align:left;color:var(--ink);box-shadow:var(--shadow);border:1px solid var(--line);flex-direction:column;gap:4px;padding:16px 18px;display:flex}.topic:hover{border-color:var(--sky);box-shadow:var(--glow), var(--shadow)}.topic .name{font-size:1.05rem;font-weight:800}.topic .es{color:var(--muted);font-size:.9rem;font-weight:600}.topic .streak{color:var(--sun);font-size:.9rem;font-weight:700}.excard{background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:26px;flex-direction:column;gap:18px;padding:28px;display:flex}.excard .q{white-space:pre-wrap;font-size:1.5rem;font-weight:800;line-height:1.4}.excard .answer{align-items:center;gap:10px;display:flex}.excard .answer input{flex:1;font-size:1.3rem}.options{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:10px;display:grid}.options button{background:var(--blue-bg);color:var(--ink);border:1px solid var(--line);padding:.8em;font-size:1.15rem}.options button:hover{background:var(--blue-bg-hover);border-color:var(--sky);box-shadow:var(--glow)}.options button.picked{background:var(--sky);color:var(--on-bright);border-color:var(--sky)}.feedback{border-radius:var(--radius);white-space:pre-wrap;padding:16px 20px;font-size:1.1rem;line-height:1.5}.feedback.ok{background:var(--ok-bg);border:2px solid var(--leaf);box-shadow:var(--glow-leaf)}.feedback.no{background:var(--no-bg);border:2px solid var(--rose)}.hintbox{background:var(--warn-bg);border:2px dashed var(--sun);border-radius:14px;padding:12px 16px}.progressbar{gap:8px;display:flex}.progressbar span{background:var(--line);border-radius:6px;flex:1;height:12px}.progressbar span.ok{background:var(--leaf);box-shadow:0 0 8px #3ddc8499}.progressbar span.no{background:var(--rose)}.progressbar span.cur{background:var(--sun)}.round-done{text-align:center;flex-direction:column;align-items:center;gap:14px;font-size:1.4rem;display:flex}.stars{letter-spacing:4px;font-size:2.4rem}.chess{align-items:center}.chess>.row{width:100%}.chess-menu{width:100%;max-width:560px}.chess-label{margin-bottom:8px;font-weight:800}.chess-pick{font-size:1.05rem}.chess-pick.on{background:var(--leaf);color:var(--on-bright)}.chess-board{box-shadow:var(--glow), var(--shadow);border:4px solid var(--line);box-sizing:content-box;-webkit-user-select:none;user-select:none;border-radius:12px;flex-wrap:wrap;display:flex;overflow:hidden}.sq{cursor:pointer;justify-content:center;align-items:center;line-height:1;display:flex;position:relative}.sq.light{background:#f0d9b5}.sq.dark{background:#b58863}.sq.last{box-shadow:inset 0 0 0 100px #f5b62d73}.sq.sel{box-shadow:inset 0 0 0 100px #4a90d98c}.sq.check{box-shadow:inset 0 0 0 100px 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