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var(--panel-strong))}}.empty-mark{color:var(--teal)}.empty-session h2{font-size:1.7rem;line-height:1.18}.prompt-cloud{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.prompt-cloud button{background:var(--orange);border-radius:999px;max-width:240px;min-height:46px}@supports (color:color-mix(in lab, red, red)){.prompt-cloud button{background:color-mix(in srgb, var(--orange) 12%, var(--panel-strong))}}.prompt-cloud button{color:var(--app-fg);padding:9px 14px;font-size:.9rem;font-weight:780;line-height:1.2}.message-row{align-items:flex-end;gap:10px;width:min(100%,850px);display:flex}.message-row.tutor{align-self:flex-start}.message-row.student{flex-direction:row-reverse;align-self:flex-end}.message-avatar{border:1px solid var(--line);background:var(--panel-strong);width:38px;height:38px;color:var(--teal);border-radius:15px;flex:none}.message-row.student .message-avatar{background:var(--student);color:var(--student-fg)}.message{border:1px solid var(--line);border-radius:26px;width:fit-content;max-width:min(100%,720px);padding:15px 17px;box-shadow:0 12px 28px #422d1c14}.message.tutor{background:var(--tutor);color:var(--tutor-fg);border-bottom-left-radius:9px}.message.student{background:var(--student);color:var(--student-fg);border-bottom-right-radius:9px}.message.thinking{opacity:.9}.thinking-body{align-items:center;gap:10px;display:flex}.thinking-body p{color:inherit;opacity:.72;margin:0;font-weight:750}.typing-dots{align-items:center;gap:4px;display:inline-flex}.typing-dots span{opacity:.45;background:currentColor;border-radius:999px;width:6px;height:6px;animation:1s ease-in-out infinite typing-bounce;display:block}.typing-dots span:nth-child(2){animation-delay:.15s}.typing-dots span:nth-child(3){animation-delay:.3s}@keyframes typing-bounce{0%,80%,to{transform:translateY(0)}40%{opacity:.9;transform:translateY(-3px)}}.message-meta{letter-spacing:0;opacity:.64;text-transform:uppercase;justify-content:space-between;gap:12px;margin-bottom:8px;font-size:.68rem;font-weight:900}.message-body{font-size:1.03rem;line-height:1.62}.message-body>*+*{margin-top:.72rem}.message-body p{margin:0}.message-body ul,.message-body ol{margin:.72rem 0 0;padding-left:1.25rem}.message-body strong{font-weight:900}.message-body code,.message-body .katex{font-size:1.03em}.message-image{object-fit:cover;border:1px solid;width:min(100%,340px);max-height:270px;display:block}@supports (color:color-mix(in lab, red, red)){.message-image{border:1px solid color-mix(in srgb, currentColor 20%, transparent)}}.message-image{border-radius:18px;margin-bottom:10px}.composer{border-top:1px solid var(--line);background:var(--panel);gap:10px;display:grid}@supports (color:color-mix(in lab, red, red)){.composer{background:color-mix(in srgb, var(--panel) 64%, transparent)}}.composer{padding:12px}.composer-surface{border:1px solid var(--teal);grid-template-columns:50px minmax(0,1fr) 54px;align-items:end;gap:8px;display:grid}@supports (color:color-mix(in lab, red, red)){.composer-surface{border:1px solid color-mix(in srgb, var(--teal), var(--line) 60%)}}.composer-surface{background:var(--panel-strong);border-radius:28px;padding:8px}.composer-tool{background:var(--teal);border-radius:20px;place-items:center;width:50px;height:50px;display:grid}@supports (color:color-mix(in lab, red, red)){.composer-tool{background:color-mix(in srgb, var(--teal) 12%, transparent)}}.composer-tool{color:var(--teal)}textarea{resize:vertical;min-height:50px;max-height:150px;color:var(--app-fg);background:0 0;border:0;border-radius:18px;outline:none;padding:13px 6px;line-height:1.35}.send-button{border-color:var(--orange);width:54px;height:54px}@supports (color:color-mix(in lab, red, red)){.send-button{border-color:color-mix(in srgb, var(--orange), transparent 24%)}}.send-button{background:var(--orange);color:#fffaf0;box-shadow:inset 0 -7px #0000001f}.image-preview{border:1px solid var(--line);background:var(--panel-strong);border-radius:18px;grid-template-columns:52px minmax(0,1fr) 36px;gap:10px;width:min(100%,460px);padding:7px}.image-preview img{object-fit:cover;border-radius:12px;width:52px;height:52px}.image-preview span{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;font-size:.85rem;font-weight:820;overflow:hidden}.image-preview button{border:1px solid var(--line);background:var(--soft);width:36px;height:36px;color:var(--app-fg);border-radius:12px;place-items:center;display:grid}.composer-note{color:var(--orange-strong);font-size:.82rem;font-weight:820}.signin-page{overflow:hidden}.signin-shell{grid-template-columns:minmax(0,1.05fr) minmax(320px,.75fr);gap:18px;width:min(100%,1040px);display:grid}.signin-copy,.signin-card{border:1px solid var(--line);background:var(--panel)}@supports (color:color-mix(in lab, red, red)){.signin-copy,.signin-card{background:color-mix(in srgb, var(--panel) 94%, transparent)}}.signin-copy,.signin-card{box-shadow:var(--shadow)}.signin-copy{border-radius:34px;align-content:space-between;min-height:520px;padding:26px;display:grid}.back-link{background:var(--panel-strong);width:fit-content;min-height:42px;color:var(--app-fg);border-radius:999px;align-items:center;gap:8px;padding:0 14px;font-size:.86rem;font-weight:850;text-decoration:none;display:inline-flex}.signin-title-lockup{gap:18px;display:grid}.signin-title-lockup h1{max-width:720px;font-size:4.35rem;line-height:.96}.signin-mark{background:var(--orange);color:#22160d;border-radius:25px;width:76px;height:76px;box-shadow:inset 0 -10px #00000024}.language-badges{flex-wrap:wrap;gap:8px;display:flex}.language-badges span{border:1px solid var(--line);background:var(--panel-strong);min-height:36px;color:var(--muted);border-radius:999px;padding:7px 12px;font-size:.86rem;font-weight:850}.signin-card{border-radius:30px;align-content:center;gap:18px;padding:24px;display:grid}.signin-card-header{align-items:center;gap:12px;display:flex}.signin-card-header svg{color:var(--orange)}.signin-card h2{font-size:2.55rem;line-height:1}.signin-button{border-color:var(--orange);justify-content:center;align-items:center;gap:10px;min-height:56px;display:flex}@supports (color:color-mix(in lab, red, red)){.signin-button{border-color:color-mix(in srgb, var(--orange), transparent 25%)}}.signin-button{background:var(--orange);color:#fffaf0;border-radius:18px;font-weight:900}.signin-button:disabled{opacity:.72}.signin-mini-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;display:grid}.signin-mini-grid span{border:1px solid var(--line);background:var(--panel-strong);min-height:58px;color:var(--app-fg);border-radius:20px;place-items:center;font-family:Geist Mono,Geist Mono Fallback,ui-monospace,monospace;font-size:1.35rem;font-weight:900;display:grid}@media (max-width:900px){.mindful-stage,.signin-page{padding:max(8px, env(safe-area-inset-top)) 8px max(8px, env(safe-area-inset-bottom));align-items:start}.mindful-shell{border-radius:26px;grid-template-rows:auto auto auto;height:auto;min-height:calc(100svh - 16px);overflow:visible}.mindful-header{align-items:flex-start;padding:12px}.mindful-actions{flex-wrap:wrap;justify-content:flex-end}.mindful-brand h1{font-size:1.25rem}.focus-card{border-radius:26px;grid-template-columns:1fr;margin:0 12px;padding:18px}.focus-copy h2{font-size:1.95rem}.math-garden{grid-template-columns:repeat(4,minmax(0,1fr));grid-auto-rows:56px}.tile,.tile.wide,.tile.tall{grid-area:auto;font-size:1.05rem}.learning-strip{padding:12px}.chat-room{border-radius:26px;min-height:clamp(340px,55svh,560px);margin:0 12px 12px}.conversation{padding:16px 12px}.message{max-width:100%}.message-row{width:100%}.signin-shell{grid-template-columns:1fr}.signin-copy{min-height:380px}.signin-title-lockup h1{font-size:3rem}}@media (max-width:560px){.brand-mark{border-radius:14px;width:42px;height:42px}.mindful-header{grid-template-columns:1fr;gap:10px;padding:10px;display:grid}.mindful-actions{grid-template-columns:minmax(0,1fr) 42px 42px;justify-content:stretch;gap:6px;display:grid}.soft-select.compact{flex:unset;min-width:0;height:42px;padding:0 34px 0 12px}.icon-button,.auth-button{width:42px;min-width:42px;height:42px;min-height:42px;padding:0}.auth-button span{display:none}.focus-copy h2{font-size:1.45rem;line-height:1.08}.focus-copy p:last-child,.message-body{font-size:.94rem}.learning-strip{grid-template-columns:1fr;gap:8px;padding:10px;display:grid}.soft-select{border-radius:18px;gap:4px;min-width:0;padding:9px 34px 9px 12px}.soft-select select{font-size:.93rem}.soft-select>svg{bottom:13px;right:12px}.math-garden{display:none}.focus-card{border-radius:24px;margin:0 10px;padding:14px 16px}.focus-copy{gap:8px}.empty-session h2{font-size:1.35rem}.empty-session{align-self:start;gap:12px;margin:0 auto}.empty-mark{border-radius:18px;width:52px;height:52px}.prompt-cloud{grid-template-columns:1fr;gap:8px;display:grid}.prompt-cloud button{border-radius:18px;max-width:none;min-height:40px;padding:8px 12px;font-size:.84rem}.message-avatar{display:none}.chat-room{border-radius:22px;min-height:clamp(340px,54svh,520px);margin:0 10px 10px}.conversation{padding:14px 12px}.composer{gap:8px;padding:10px}.composer-surface{border-radius:24px;grid-template-columns:42px minmax(0,1fr) 46px;padding:7px}.composer-tool{border-radius:16px;width:42px;height:42px}.send-button{width:46px;height:46px}textarea{resize:none;min-height:46px;max-height:112px;padding:10px 4px;font-size:.95rem}.signin-copy,.signin-card{border-radius:24px;padding:18px}.signin-copy{min-height:340px}.signin-title-lockup h1{font-size:2.45rem}}