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button:hover{color:#eff0ea;border-color:#727b80;outline:none}.task-next-button:disabled{opacity:.4;cursor:default}.task-empty{text-align:center;place-content:center;justify-items:center;gap:20px;min-height:420px;display:grid}.task-empty h1{margin:0;font-size:24px;font-weight:500}@media (width<=900px){.task-select-layout{width:calc(100% - 28px);padding-top:18px;display:block}.task-topic-panel{margin-bottom:18px;position:static}.task-topic-heading,.task-topic-nav{display:none}.task-topic-select{color:#7d8488;letter-spacing:.06em;text-transform:uppercase;gap:7px;font:11px/1.3 ui-monospace,JetBrains Mono,monospace;display:grid}.task-topic-select select{color:#e4e3de;background:#14181b;border:1px solid #343a3e;border-radius:8px;width:100%;min-height:46px;padding:0 42px 0 13px;font:14px/1.3 Inter,system-ui,sans-serif}.task-focus-card{grid-template-columns:1fr}.task-paper{min-height:430px;padding:38px 30px}.task-paper:before{inset:12px}.task-picker-stem.stem.paper-stem{font-size:18px}.task-picker-stem .stem-body{gap:30px}.task-picker-stem .stem-visuals{min-height:110px}.task-picker-stem .stem-figure,.task-picker-stem .stem-figure-inline,.task-picker-stem .stem-figure-inline .stem-figure-base{max-height:230px}.task-focus-actions{border-top:1px solid #30363a;border-left:0;gap:28px;padding:24px 22px}.task-focus-actions h1{font-size:21px}}@media (width<=560px){.task-select-page .topbar{gap:10px;padding-inline:14px}.task-select-page .topbar-login{display:none}.task-select-page .path-title{font-size:14px}.task-focus-status{margin-bottom:8px}.task-focus-card{min-height:0}.task-paper{min-height:390px;padding:34px 25px}.task-picker-stem .stem-visuals{min-height:90px}}.practice-problem .stem.paper-stem,.practice-preview .stem.paper-stem{color:#17191b;max-height:none;box-shadow:none;background:#deddd6;border:1px solid #c8c7c0;border-radius:9px;padding:clamp(22px,3vw,34px);overflow:visible}.practice-problem .stem.paper-stem .stem-body,.practice-preview .stem.paper-stem .stem-body{gap:24px;display:grid}.practice-problem .stem-visuals:empty,.practice-preview .stem-visuals:empty{display:none}.practice-problem .stem-visuals,.practice-preview .stem-visuals{justify-content:center;align-items:center;min-height:120px;display:flex}.practice-problem .stem-figure,.practice-problem .stem-figure-inline,.practice-preview .stem-figure,.practice-preview .stem-figure-inline{background:0 0;border:0;width:min(100%,460px);max-width:100%;max-height:260px;margin:0 auto;padding:0;display:block}.practice-problem .stem-figure-inline .stem-figure-base,.practice-preview .stem-figure-inline .stem-figure-base{width:100%;max-height:260px}.practice-problem .stem-tex,.practice-preview .stem-tex{filter:none;opacity:1}@media (width<=800px){.practice-problem .stem.paper-stem,.practice-preview .stem.paper-stem{padding:24px}.practice-problem .stem-visuals,.practice-preview .stem-visuals{min-height:100px}}.practice-desk{padding-bottom:94px}.practice-header+.practice-workspace,.app-header+.practice-workspace,.practice-notice+.practice-workspace,.practice-error+.practice-workspace{margin-top:18px}.practice-workspace{grid-template-columns:minmax(370px,.9fr) minmax(450px,1.1fr);width:min(1160px,100%);min-height:min(640px,100dvh - 154px);margin-inline:auto}.practice-problem{padding:26px}.practice-problem h1{margin:0 0 16px}.practice-answer{gap:9px;margin-top:22px}.practice-answer>label{color:#aeb4b5;font-size:14px}.practice-answer input:not([type=checkbox]),.practice-answer .btn{min-height:48px}.practice-actions{gap:8px;margin-top:14px}.practice-actions button{border-radius:7px;padding-inline:13px}.board-welcome{justify-content:flex-start;min-height:0;margin:clamp(80px,14vh,130px) 0 0}.board-empty-copy{color:#b8bfbc;max-width:390px;margin:0 0 12px;font-size:18px;line-height:1.55}.board-welcome small{max-width:390px;margin:0;font-size:13px;line-height:1.55}.practice-memory{margin:14px 0 0;width:min(1160px,100%);margin-inline:auto}.practice-voice{min-height:66px;padding:10px max(24px,50vw - 700px)}.practice-voice>div:first-child{font-size:13px}.practice-voice .btn{min-height:42px}@media (width<=900px){.practice-workspace{grid-template-columns:1fr}.board-welcome{margin-top:42px}}@media (width<=800px){.practice-desk{padding:0 10px 84px}.practice-header{min-height:56px}.practice-workspace{min-height:0}.practice-header+.practice-workspace,.app-header+.practice-workspace,.practice-notice+.practice-workspace,.practice-error+.practice-workspace{margin-top:12px}.practice-path{gap:8px;padding-block:8px}.practice-problem{padding:14px}.mobile-condition-toggle{color:#b7bcbd;justify-content:space-between;align-items:center;min-height:38px;padding:0 2px 10px;font:600 14px/1.3 Inter,system-ui,sans-serif;display:flex}.mobile-condition-toggle:hover,.mobile-condition-toggle:focus-visible{color:var(--text);outline:none}.condition-toggle-icon{color:var(--accent);font:14px/1 ui-monospace,JetBrains Mono,monospace}.practice-workspace:has(.problem-content.collapsed){grid-template-rows:auto minmax(0,1fr);min-height:calc(100dvh - 132px)}.practice-workspace:has(.problem-content.collapsed) .practice-board{min-height:0}.practice-problem .stem.paper-stem,.practice-preview .stem.paper-stem{border-radius:8px;padding:20px}.practice-problem .stem.paper-stem .stem-body,.practice-preview .stem.paper-stem .stem-body{gap:18px}.practice-problem .stem-visuals,.practice-preview .stem-visuals{min-height:80px}.practice-problem .stem-figure,.practice-problem .stem-figure-inline,.practice-preview .stem-figure,.practice-preview .stem-figure-inline,.practice-problem .stem-figure-inline .stem-figure-base,.practice-preview .stem-figure-inline .stem-figure-base{max-height:190px}.practice-answer{margin-top:18px}.practice-board{min-height:260px;padding:22px 20px}.board-welcome{min-height:0;margin-top:34px}.board-empty-copy{font-size:16px}.practice-voice{flex-wrap:nowrap;min-height:64px;padding:9px 12px}.practice-voice small{display:none}.practice-voice .voice-buttons{flex-wrap:nowrap;flex:none;width:auto;margin-left:auto}.practice-voice .btn{white-space:nowrap;min-height:42px;padding-inline:13px}}@media (width<=600px){.app-header{height:58px}.app-header-inner{gap:14px;width:calc(100% - 28px)}.wall-page .app-header-inner,.practice-desk .app-header-inner,.practice-home .app-header-inner{width:100%}.auth-stage{min-height:calc(100dvh - 58px);padding:18px}.app-header-actions{gap:7px}.app-nav-link{font-size:12px}.app-account-link{display:none}.task-page-heading{gap:9px;width:calc(100% - 28px);min-height:64px;padding-top:20px}.task-page-heading h1{font-size:19px}.task-page-heading>span:last-child{display:none}}@media (width<=430px){.practice-logo span,.save-status{display:none}.practice-header>.btn-ghost,.practice-voice>div:first-child,.practice-voice .btn{font-size:12px}}:root{--control-sm:34px;--control-md:42px;--control-lg:46px;--control-radius:7px;--focus-ring:#ff784233}button,input,select{box-sizing:border-box}.btn,.btn-ghost,.app-nav-link,.task-start-button,.task-next-button,.practice-actions button,.auth-tab,.wall-exam-btn{transition:color .14s,border-color .14s,background-color .14s,opacity .14s}.btn{min-height:var(--control-md);border:1px solid var(--accent);border-radius:var(--control-radius);background:var(--accent);color:#18110e;height:auto;padding:0 15px;font:650 13px/1 Inter,system-ui,sans-serif}.btn:hover:not(:disabled){background:#ff8958}.btn-ghost{min-width:var(--control-sm);min-height:var(--control-sm);border-radius:var(--control-radius);color:#afb5b7;background:0 0;border:1px solid #343a3e;height:auto;padding:0 11px;font:500 13px/1 Inter,system-ui,sans-serif}.btn-ghost:hover:not(:disabled){color:var(--text);background:#171b1e;border-color:#626a6e}.btn:focus-visible,.btn-ghost:focus-visible,.app-nav-link:focus-visible,.wall-exam-btn:focus-visible,.task-start-button:focus-visible,.task-next-button:focus-visible,.practice-actions button:focus-visible,.task-topic:focus-visible,.mobile-condition-toggle:focus-visible,.auth-tab:focus-visible{outline:2px solid var(--focus-ring);outline-offset:2px}.btn:disabled,.btn-ghost:disabled,.task-next-button:disabled,.practice-actions button:disabled{opacity:.42;cursor:default}.app-nav-link{min-height:var(--control-sm);font:500 13px/1 Inter,system-ui,sans-serif}.wall-exam-btn{min-height:var(--control-sm);border-radius:var(--control-radius);justify-content:center;align-items:center;padding:0 12px;display:inline-flex}.task-start-button,.task-next-button,.task-empty button{min-height:var(--control-lg);border-radius:8px;padding-inline:16px;font:600 13px/1 Inter,system-ui,sans-serif}.practice-answer{align-items:flex-end}.practice-answer input:not([type=checkbox]){min-height:var(--control-md);height:var(--control-md);border-radius:var(--control-radius);color:var(--text);background:#0d1113;border:1px solid #394146;padding:0 13px;font:400 14px/1.3 Inter,system-ui,sans-serif;transition:border-color .14s,box-shadow .14s,background-color .14s}.practice-answer input:not([type=checkbox])::placeholder{color:#70787b;opacity:1}.practice-answer input:not([type=checkbox]):hover{border-color:#50595e}.practice-answer input:not([type=checkbox]):focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--focus-ring);background:#101416;outline:none}.practice-answer .btn{min-height:var(--control-md);height:var(--control-md)}.practice-actions button{border-radius:var(--control-radius);min-height:36px;padding:0 12px;font:500 13px/1 Inter,system-ui,sans-serif}.practice-voice .btn{min-height:var(--control-md);padding-inline:16px}.task-topic-select select{min-height:var(--control-md);height:var(--control-md);border-radius:var(--control-radius)}.auth-card{border-radius:10px;gap:10px;padding:24px}.auth-input{min-height:var(--control-md);height:var(--control-md);border-radius:var(--control-radius);padding:0 12px;font:400 14px/1.3 Inter,system-ui,sans-serif;transition:border-color .14s,box-shadow .14s}.auth-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--focus-ring)}.auth-tab{height:38px;font:500 13px/1 Inter,system-ui,sans-serif}.auth-submit{min-height:var(--control-md)}@media (width<=430px){.practice-answer input:not([type=checkbox]),.practice-answer .btn{height:40px;min-height:40px}.practice-actions button{min-height:34px}.practice-voice .btn{min-height:40px;padding-inline:13px}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}