:root{color-scheme:light;--bg:#f8fafc;--surface:#fff;--surface-2:#f1f5f9;--border:#cbd5e1;--border-strong:#64748b;--text:#0f172a;--text-muted:#475569;--primary:#2563eb;--primary-hover:#1d4ed8;--primary-soft:#dbeafe;--on-primary:#fff;--success:#15803d;--success-soft:#dcfce7;--error:#b91c1c;--error-soft:#fee2e2;--warning:#b45309;--warning-soft:#fef3c7;--focus:#2563eb;--sp-1:4px;--sp-2:8px;--sp-3:12px;--sp-4:16px;--sp-5:20px;--sp-6:24px;--sp-8:32px;--sp-10:40px;--sp-12:48px;--sp-16:64px;--r-sm:6px;--r-md:10px;--r-lg:16px;--r-full:999px;--sh-1:0 1px 2px #0f172a0f;--sh-2:0 4px 12px #0f172a1a;--sh-3:0 12px 32px #0f172a2e;--sidebar:260px;--header:76px;--fs-display:2.25rem;--fs-h1:1.75rem;--fs-h2:1.375rem;--fs-h3:1.125rem;--fs-question:1.25rem;--fs-body:1rem;--fs-small:.875rem;--fs-code:.9375rem;--fs-caption:.75rem;--z-sticky:10;--z-nav:20;--z-overlay:40;--z-dialog:50;--z-toast:60}
:root[data-theme=dark]{color-scheme:dark;--bg:#0b1120;--surface:#111827;--surface-2:#1f2937;--border:#334155;--border-strong:#94a3b8;--text:#e5e7eb;--text-muted:#9ca3af;--primary:#60a5fa;--primary-hover:#93c5fd;--primary-soft:#1e3a5f;--on-primary:#0b1120;--success:#4ade80;--success-soft:#14361f;--error:#f87171;--error-soft:#3f1717;--warning:#fbbf24;--warning-soft:#3a2a0a;--focus:#60a5fa;--sh-1:none;--sh-2:none;--sh-3:none}
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16px}h1{font-size:var(--fs-h1);line-height:1.25;letter-spacing:-.035em}h2{font-size:var(--fs-h2);line-height:1.3;letter-spacing:-.025em}h3{font-size:var(--fs-h3);line-height:1.35}fieldset{border:0;padding:0;margin:0;min-width:0}legend{color:var(--text-muted);font-size:.875rem;margin-bottom:16px}label{display:block;font-weight:550}input:not([type=checkbox]):not([type=radio]),select,textarea{width:100%;min-width:0;border:1px solid var(--border-strong);border-radius:var(--r-md);background:var(--surface);color:var(--text);padding:12px 14px;min-height:48px}input[type=checkbox],input[type=radio]{width:20px;height:20px;accent-color:var(--primary);flex-shrink:0}input:focus,textarea:focus{border-color:var(--primary)}input[aria-invalid=true]{border-color:var(--error)}textarea{resize:vertical;min-height:160px}svg.icon{width:22px;height:22px;display:inline-block;vertical-align:middle;flex-shrink:0;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.muted{color:var(--text-muted)}.small{font-size:var(--fs-small)}.eyebrow{font-size:.72rem;font-weight:700;letter-spacing:.12em;color:var(--text-muted);text-transform:uppercase;margin-bottom:12px}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.skip-link{position:fixed;top:-100px;left:16px;z-index:100;background:var(--primary);color:var(--on-primary);padding:12px}.skip-link:focus{top:8px}[hidden]{display:none!important}.button{display:inline-flex;gap:10px;justify-content:center;align-items:center;min-height:48px;padding:11px 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.08s}.button:hover{text-decoration:none}.primary{background:var(--primary);color:var(--on-primary)}.primary:hover{background:var(--primary-hover)}.secondary{background:var(--surface);border-color:var(--border-strong);color:var(--text)}.secondary:hover{background:var(--surface-2)}.text-button{background:none;color:var(--primary)}.danger{background:var(--error);color:var(--surface)}.full{width:100%}.icon-button{width:44px;height:44px;padding:10px;border:0;border-radius:50%;background:transparent;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--text-muted)}.icon-button:hover{background:var(--surface-2);color:var(--primary)}.actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.topbar{height:var(--header);position:sticky;top:0;z-index:var(--z-nav);background:var(--surface);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:24px;padding:0 32px}.brand{display:flex;gap:12px;align-items:center;color:var(--text);font-size:1.1rem;flex-shrink:0;width:calc(var(--sidebar) - 32px)}.brand:hover{text-decoration:none}.brand strong{font-weight:500;color:var(--text-muted)}.brand-mark{display:grid;place-content:center;position:relative;width:36px;height:36px;background:var(--primary);color:var(--on-primary);border-radius:10px;font-weight:800;font-size:23px;letter-spacing:-4px;padding-right:4px}.brand-mark span{font-size:14px;position:absolute;right:5px;bottom:2px}.header-search{max-width:540px;display:flex;gap:12px;align-items:center;flex:1;color:var(--text-muted)}.header-search input{background:transparent!important;border:0!important;outline-offset:-2px;min-height:40px!important;padding-left:0!important}.header-search kbd{white-space:nowrap;font-size:.7rem;border:1px solid var(--border);border-radius:5px;padding:2px 6px}.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}.avatar{height:42px;width:42px;background:var(--primary-soft);color:var(--primary);border:1px solid var(--border);border-radius:50%;display:grid;place-content:center;position:relative;cursor:pointer;list-style:none}.avatar::-webkit-details-marker{display:none}.online-dot{position:absolute;width:10px;height:10px;border:2px solid var(--surface);background:var(--success);border-radius:50%;bottom:0;right:0}.user-menu{position:relative}.user-dropdown{position:absolute;right:0;top:54px;background:var(--surface);padding:20px;width:min(300px,calc(100vw - 24px));border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--sh-2);z-index:40}.user-dropdown a,.user-dropdown button{display:flex;gap:12px;align-items:center;color:var(--text);padding:10px 0;width:100%;background:none;border:0;font-size:.9375rem;text-align:left}.user-name{overflow-wrap:anywhere;font-weight:600;padding-bottom:14px;border-bottom:1px solid var(--border)}.mobile-search{display:none}.sidebar{position:fixed;top:var(--header);bottom:0;left:max(0px,calc((100vw - 1600px)/2));width:var(--sidebar);padding:32px 20px 24px;display:flex;flex-direction:column;gap:6px;border-right:1px solid var(--border);background:var(--surface);z-index:15;overflow-y:auto}.nav-label{font-size:.6875rem;letter-spacing:.14em;font-weight:700;color:var(--text-muted);padding:0 16px 12px}.nav-link{display:flex;align-items:center;gap:14px;color:var(--text-muted);padding:12px 16px;border-radius:10px;font-size:.9375rem;font-weight:500;min-height:48px}.nav-link:hover{background:var(--surface-2);text-decoration:none}.nav-link.active{color:var(--primary);background:var(--primary-soft);font-weight:650}.nav-link .badge{margin-left:auto}.nav-divider{height:1px;background:var(--border);margin:20px 16px}.sidebar-bottom{margin-top:auto;padding-top:32px}.sidebar-note{border:1px solid var(--border);border-radius:12px;padding:16px;font-size:.8rem;color:var(--text-muted)}.sidebar-note strong{display:block;color:var(--text);margin-bottom:6px}.topic-tree{padding-left:20px;margin:8px 0;font-size:.75rem}.topic-tree a{display:block;color:var(--text-muted);padding:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.workspace{max-width:1600px;margin:0 auto;padding:38px 32px 64px calc(var(--sidebar) + 36px);display:grid;grid-template-columns:minmax(0,760px) 280px;gap:32px;align-items:start}.content{min-width:0;outline:none}.context{min-width:0;position:sticky;top:108px;display:grid;gap:20px}.bottom-nav{display:none}.page-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:28px}.page-heading p{margin-bottom:8px}.page-heading h1{margin-bottom:8px}.page-heading h1.display{font-size:var(--fs-display)}.crumbs{font-size:.8125rem;color:var(--text-muted);margin-bottom:28px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);padding:24px;box-shadow:var(--sh-1);min-width:0}.card p:last-child{margin-bottom:0}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:20px}.section-heading h2,.section-heading h3{margin:0}.section-heading a{font-size:.875rem}.stack{display:grid;gap:12px}.stack>label{margin-top:4px}.grid{display:grid;gap:20px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.dashboard{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:20px}.hero-card{background:var(--primary);color:var(--on-primary);min-height:250px;display:flex;flex-direction:column;align-items:start;position:relative;overflow:hidden}.hero-card .eyebrow{color:var(--on-primary);opacity:.85}.hero-card h2{font-size:1.75rem;max-width:340px}.hero-card p{opacity:.9;font-size:.9375rem}.hero-card .button{background:var(--surface);color:var(--primary);margin-top:auto;position:relative;z-index:1}.hero-card .hero-art{position:absolute;right:12px;bottom:20px;opacity:.12;transform:rotate(-12deg)}.hero-art svg.icon{width:140px;height:140px;stroke-width:1.1}.goal-card{display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center;gap:12px}.goal-card h3{margin:0}.ring{--value:0;position:relative;border-radius:50%;height:120px;width:120px;display:grid;place-content:center;background:conic-gradient(var(--primary) calc(var(--value)*1%),var(--surface-2) 0);flex-shrink:0}.ring:before{content:"";position:absolute;inset:9px;background:var(--surface);border-radius:50%}.ring>span{position:relative;text-align:center;font-weight:750;font-size:1.7rem;line-height:1.2}.ring small{font-size:.75rem;font-weight:500;color:var(--text-muted)}.ring.small{width:48px;height:48px}.ring.small:before{inset:5px}.ring.small>span{font-size:.7rem}.span-full{grid-column:1/-1}.metric{font-size:2rem;font-weight:750;letter-spacing:-.04em;line-height:1.3}.metric-label{font-size:.8125rem;color:var(--text-muted)}.stat-row{display:flex;justify-content:space-between;gap:16px;margin-bottom:12px}.stat-row strong{color:var(--text);font-size:.875rem}.stat-row span{font-size:.875rem;color:var(--text-muted)}.progress{height:8px;background:var(--surface-2);border-radius:999px;overflow:hidden;display:flex}.progress>span{display:block;background:var(--primary);height:100%;transition:width .4s}.progress .mastered{background:var(--success)}.progress .weak{background:var(--error)}.progress .new{background:var(--border)}.progress-label{display:flex;justify-content:space-between;font-size:.8125rem;margin:10px 0 6px;color:var(--text-muted)}.chips,.badges{display:flex;gap:8px;flex-wrap:wrap}.chip{border:1px solid var(--border-strong);background:var(--surface);border-radius:999px;padding:7px 13px;font-size:.8125rem;min-height:36px;display:inline-flex;align-items:center;gap:8px;color:var(--text);cursor:pointer}.chip[aria-pressed=true],.chip.active{border-color:var(--primary);background:var(--primary-soft);color:var(--primary)}.chip input{margin:0;width:16px;height:16px}.badge{display:inline-flex;gap:5px;align-items:center;min-height:22px;padding:2px 7px;background:var(--surface-2);color:var(--text-muted);border-radius:6px;font-size:.6875rem;font-weight:650;letter-spacing:.025em}.badge.ps{color:#7c3aed;background:#7c3aed14}.badge.eua{color:#0f766e;background:#0f766e14}.badge.projekt{color:#c2410c;background:#c2410c14}.badge.success,.success{color:var(--success);background:var(--success-soft)}.badge.error,.error{color:var(--error);background:var(--error-soft)}.badge.warning,.warning{color:var(--warning);background:var(--warning-soft)}[data-theme=dark] .badge.ps{color:#a78bfa}[data-theme=dark] .badge.eua{color:#2dd4bf}[data-theme=dark] .badge.projekt{color:#fb923c}.filter-bar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin:20px 0}.filter-bar select{width:auto;max-width:100%}.topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.topic-card{display:flex;flex-direction:column;gap:12px;color:var(--text);transition:border-color .15s,box-shadow 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small{display:block;color:var(--text-muted);font-size:.75rem;margin-top:4px}.question-row .status-dot{color:var(--primary)}.empty{padding:40px 16px;text-align:center;max-width:420px;margin:0 auto}.empty>svg{width:56px;height:56px;margin-bottom:20px;color:var(--text-muted)}.empty p{color:var(--text-muted)}.section-gap{margin-top:32px}.context .card{padding:20px}.context h3{font-size:.9375rem}.context p{font-size:.8125rem;color:var(--text-muted)}.context .eyebrow{font-size:.625rem}.tip{padding:16px;border-radius:12px;background:var(--surface-2)}.tip p{margin:10px 0 0}.streak{display:inline-flex;align-items:center;gap:6px;font-size:.8125rem;color:var(--warning)}.topic-detail-header{margin-bottom:24px}.topic-detail-header .badges{margin-bottom:16px}.subtopic-row{display:flex;gap:16px;align-items:center;padding:16px 0;border-bottom:1px solid var(--border)}.subtopic-row>div{flex:1;min-width:0}.subtopic-row:last-child{border:0}.subtopic-row h3{font-size:.9375rem;margin-bottom:4px}.subtopic-row p{font-size:.8125rem;color:var(--text-muted);margin:0}.focus-mode .sidebar,.focus-mode .bottom-nav{display:none}.focus-mode .workspace{padding-left:32px;grid-template-columns:minmax(0,760px) 280px;max-width:1120px}.focus-mode .header-search{margin-left:auto}.focus-mode .brand{width:auto}.quiz-head{display:flex;gap:16px;align-items:center;margin-bottom:24px;position:sticky;top:var(--header);background:var(--bg);z-index:10;padding:10px 0}.quiz-head .quiz-progress{flex:1}.quiz-head p{font-size:.8125rem;margin:0 0 6px;color:var(--text-muted)}.segments{display:flex;gap:3px;height:6px}.segments span{background:var(--border);border-radius:6px;flex:1}.segments span.richtig{background:var(--success)}.segments span.falsch{background:var(--error)}.segments span.teilweise{background:var(--warning)}.question-meta{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:.8125rem;color:var(--text-muted);margin-bottom:20px}.question-title{font-size:var(--fs-question);font-weight:550;line-height:1.55;white-space:pre-wrap;letter-spacing:-.01em;overflow-wrap:anywhere}.quiz-card{padding:28px}.options{display:grid;gap:10px}.option{display:flex;align-items:center;gap:14px;min-height:56px;padding:14px 16px;border:1px solid var(--border-strong);border-radius:10px;cursor:pointer;font-size:1rem;font-weight:400;overflow-wrap:anywhere}.option.selected{background:var(--primary-soft);border:2px solid var(--primary);padding:13px 15px}.option.correct{background:var(--success-soft);border:2px solid var(--success)}.option.wrong{background:var(--error-soft);border:2px solid var(--error)}.option.missed{border:2px dashed var(--success)}.option-letter{font-size:.75rem;border:1px solid var(--border);border-radius:6px;width:28px;height:28px;display:grid;place-content:center;flex-shrink:0;background:var(--surface-2)}.option-code{font-family:"JetBrains Mono",ui-monospace,Consolas,monospace;white-space:pre-wrap}.answer-actions{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:24px}.feedback{padding:20px;border-radius:12px;margin:20px 0;border:1px solid currentColor}.feedback h3{font-size:1rem;display:flex;align-items:center;gap:8px}.feedback p{font-size:.9375rem}.explanation{line-height:1.7}.explanation p{white-space:pre-wrap}.feedback:focus{outline:2px solid var(--focus);outline-offset:4px}.codeblock{background:var(--surface-2);border:1px solid var(--border);border-radius:10px;margin:20px 0;overflow:hidden;min-width:0}.code-head{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);padding:6px 12px;font-size:.6875rem;font-weight:650;color:var(--text-muted)}.code-head button{border:0;background:transparent;color:var(--primary);font-size:.75rem;min-height:32px}.codeblock pre{margin:0;padding:16px;overflow-x:auto;font-family:"JetBrains Mono",ui-monospace,"Cascadia Code",Consolas,monospace;font-size:var(--fs-code);font-variant-ligatures:none;line-height:1.55;tab-size:2}.codeblock code{font-family:inherit}.codeblock.wrap pre{white-space:pre-wrap;overflow-wrap:anywhere}.codeblock .code-line{display:block;min-height:1.55em}.code-line:before{content:attr(data-line);display:inline-block;min-width:2.5em;color:var(--text-muted);user-select:none;font-size:.85em}.no-line-numbers .code-line:before{display:none}.token-keyword{color:#1d4ed8;font-weight:600}.token-string{color:#15803d}.token-number{color:#7c3aed}[data-theme=dark] .token-keyword{color:#93c5fd}[data-theme=dark] .token-string{color:#86efac}[data-theme=dark] .token-number{color:#c4b5fd}.number-answer{display:flex;gap:16px;align-items:center}.number-answer input{font-size:1.25rem;text-align:right;max-width:280px}.matching-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-items:center;padding:12px 0;border-bottom:1px solid var(--border)}.matching-row label{font-size:.9375rem}.matching-result{grid-column:1/-1;font-size:.8125rem}.order-row{display:flex;align-items:center;gap:12px;padding:12px;border:1px solid var(--border-strong);border-radius:10px;margin-bottom:10px;min-height:64px}.order-row .order-text{flex:1;min-width:0}.order-row .icon-button{border:1px solid var(--border);border-radius:8px}.order-row[draggable=true]{cursor:grab}.order-row.dragging{opacity:.45}.code-editor{font-family:"JetBrains Mono",ui-monospace,Consolas,monospace;tab-size:2;line-height:1.55;font-size:.9375rem}.checklist{display:grid;gap:12px;margin:20px 0}.checklist label{display:flex;gap:12px;align-items:start;font-weight:400}.timer{font-family:ui-monospace,Consolas,monospace;font-weight:700;font-size:1.5rem;white-space:nowrap;background:none;padding:0}.exam-map{display:flex;flex-wrap:wrap;gap:6px;margin:16px 0}.exam-map button{width:36px;height:36px;border:1px solid var(--border-strong);border-radius:8px;background:var(--surface);color:var(--text);font-size:.75rem}.exam-map button.answered{background:var(--primary-soft);border-color:var(--primary)}.exam-map button.current{outline:2px solid var(--primary);outline-offset:2px}.exam-map button.flagged:after{content:"•";color:var(--warning)}.task-tabs{display:flex;gap:6px;flex-wrap:wrap}.result-hero{text-align:center;padding:32px}.result-hero .ring{margin:0 auto 24px;width:150px;height:150px}.result-hero .ring>span{font-size:2.25rem}.result-hero h1{margin-top:20px}.table-scroll{overflow-x:auto;max-width:100%;margin:16px 0}table{border-collapse:collapse;width:100%;font-size:.875rem;text-align:left}th,td{padding:12px 10px;border-bottom:1px solid var(--border);vertical-align:top}th{font-weight:650;color:var(--text-muted)}.heatmap{display:grid;grid-template-rows:repeat(7,14px);grid-auto-flow:column;gap:4px;margin:20px 0;overflow-x:auto;padding:4px}.heat-cell{width:14px;border-radius:3px;background:var(--surface-2);border:1px solid var(--border)}.heat-cell[data-level="1"]{background:var(--primary-soft)}.heat-cell[data-level="2"]{background:var(--primary);opacity:.7}.heat-cell[data-level="3"]{background:var(--primary)}.box-chart{display:flex;align-items:end;justify-content:space-around;gap:16px;height:160px;padding-top:24px}.box-column{flex:1;text-align:center;font-size:.75rem;color:var(--text-muted)}.box-column i{display:block;min-height:4px;background:var(--primary);border-radius:6px 6px 0 0;margin:6px 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var(--border);border-radius:16px;max-width:560px;width:calc(100% - 32px);max-height:90dvh;padding:28px;background:var(--surface);color:var(--text);box-shadow:var(--sh-3);overflow:auto;z-index:50}dialog::backdrop{background:#0008}.dialog-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px}.dialog-heading h2{margin:0}.dialog-actions{display:flex;justify-content:flex-end;gap:12px;flex-wrap:wrap;margin-top:24px}.config-field{margin:20px 0}.config-field>label,.config-field>legend{margin-bottom:10px;font-weight:600;color:var(--text)}.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);max-width:min(420px,calc(100vw - 32px));padding:14px 20px;background:var(--text);color:var(--bg);border-radius:12px;box-shadow:var(--sh-2);z-index:60;font-size:.875rem}.toast button{border:0;background:none;color:inherit;text-decoration:underline;margin-left:12px}.persistent-warning{position:fixed;bottom:0;left:0;right:0;padding:8px 16px;background:var(--warning-soft);color:var(--warning);z-index:60;font-size:.75rem;text-align:center}.skeleton{height:280px;border:1px solid var(--border);background:linear-gradient(100deg,var(--surface-2) 30%,var(--surface) 50%,var(--surface-2) 70%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:16px}.page-enter{animation:enter .18s cubic-bezier(.2,.8,.2,1)}.collapse-toggle{margin-top:20px}.collapsed{--sidebar:80px}.collapsed .sidebar .nav-link>span:not(:first-child),.collapsed .sidebar .nav-label,.collapsed .sidebar-note,.collapsed .topic-tree{display:none}.collapsed .sidebar{padding-inline:12px}.collapsed .nav-link{padding:12px;justify-content:center}.collapsed .brand{width:48px}.collapsed .brand>span:last-child{display:none}.confetti{animation:celebrate 1.2s ease}.editor-done{display:none}.editor-status{display:flex;justify-content:space-between;gap:8px;margin-top:8px}.exam-history a{color:var(--text)}
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@media(min-width:1600px){.topbar{padding-inline:max(32px,calc((100vw - 1536px)/2))}.workspace{max-width:1600px}.sidebar{left:calc((100vw - 1600px)/2)}}
@media(max-width:1279px){:root{--sidebar:240px}.workspace{grid-template-columns:minmax(0,760px);padding:32px 28px 64px calc(var(--sidebar) + 28px)}.context{display:none}.focus-mode .workspace{grid-template-columns:minmax(0,760px);max-width:820px}.topbar{padding-inline:24px}.header-search kbd{display:none}.auth-layout{gap:40px}.header-search{max-width:420px}}
@media(min-width:1280px){body:has(.topic-grid) .workspace{grid-template-columns:minmax(0,1fr)}body:has(.topic-grid) .context{display:none}.topic-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(min-width:600px) and (max-width:899px){:root{--sidebar:80px;--header:68px}.sidebar{padding:24px 8px}.nav-label,.sidebar-note,.topic-tree,.sidebar-bottom,.nav-divider{display:none}.nav-link{flex-direction:column;gap:4px;padding:10px 2px;font-size:.625rem}.nav-link .badge{display:none}.brand{width:auto}.brand>span:last-child{display:none}.header-search{display:none}.mobile-search{display:inline-flex}.workspace{padding:28px 24px 110px 104px;max-width:820px}.answer-actions{position:sticky;bottom:12px;background:var(--surface);padding:12px;border:1px solid var(--border);border-radius:12px;z-index:10}.auth-layout{grid-template-columns:1fr;max-width:480px;margin:auto}.auth-intro h1{font-size:2.5rem}.auth-intro .auth-facts{display:none}.focus-mode .workspace{padding-left:24px}.auth-main{padding-top:32px}}
@media(max-width:599px){:root{--header:60px;--fs-display:1.75rem;--fs-h1:1.5rem;--fs-h2:1.25rem;--fs-question:1.125rem;--fs-code:.875rem}.topbar{padding:0 16px;gap:8px;height:calc(var(--header) + env(safe-area-inset-top));padding-top:env(safe-area-inset-top)}.brand{width:auto;font-size:1rem;gap:8px}.brand-mark{height:32px;width:32px;font-size:21px}.brand strong{display:none}.header-search{display:none}.mobile-search{display:inline-flex}.header-actions{gap:0}.header-actions>.icon-button{width:40px;height:40px}.avatar{height:38px;width:38px}.sidebar{display:none}.workspace,.focus-mode .workspace{padding:24px 16px calc(110px + env(safe-area-inset-bottom));display:block}.context{display:none}.bottom-nav{display:flex;position:fixed;bottom:0;left:0;right:0;height:calc(68px + env(safe-area-inset-bottom));padding:5px 8px env(safe-area-inset-bottom);justify-content:space-around;align-items:center;background:var(--surface);border-top:1px solid var(--border);z-index:20}.bottom-nav .nav-link{flex-direction:column;gap:2px;font-size:.625rem;padding:6px 8px;min-width:50px;border-radius:12px;position:relative}.bottom-nav .badge{position:absolute;top:0;right:0;font-size:.55rem;padding:0 4px;min-height:14px}.bottom-nav svg{width:20px;height:20px}.page-heading{margin-bottom:22px;align-items:start}.page-heading .badge{max-width:120px;text-align:center}.card{padding:20px}.dashboard{grid-template-columns:1fr 1fr;gap:12px}.hero-card{grid-column:1/-1;min-height:236px;padding:24px}.hero-card h2{font-size:1.5rem}.goal-card{grid-column:1/-1;flex-direction:row;text-align:left;gap:24px;justify-content:start}.goal-card .ring{height:92px;width:92px}.dashboard .review-card,.dashboard .weak-card{grid-column:1/-1}.topic-grid{grid-template-columns:1fr;gap:12px}.topic-card{padding:16px;gap:10px}.topic-card p{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.topic-card .topic-bottom{padding-top:0}.crumbs{display:none}.grid.three{grid-template-columns:1fr}.grid.two{gap:12px}.grid.two.mobile-stack{grid-template-columns:1fr}.section-heading{align-items:start}.quiz-card{padding:20px 16px}.quiz-head{margin-bottom:16px;padding-top:4px}.question-meta{gap:6px}.option{padding:14px 12px;gap:10px}.option.selected{padding:13px 11px}.option-letter{display:none}.answer-actions{position:fixed;bottom:0;left:0;right:0;background:var(--surface);padding:12px 16px calc(12px + env(safe-area-inset-bottom));z-index:20;border-top:1px solid var(--border);box-shadow:var(--sh-2);margin:0}.answer-actions .primary{flex:1}.feedback-sheet{position:fixed;bottom:84px;left:8px;right:8px;max-height:50dvh;overflow:auto;z-index:19;background:var(--surface);border:1px solid var(--border);border-radius:16px 16px 0 0;padding:20px;box-shadow:var(--sh-3)}.feedback-sheet.expanded{max-height:80dvh}.sheet-toggle{display:block;margin:0 auto 12px;min-height:32px;font-size:.75rem}.matching-row{grid-template-columns:1fr;gap:6px}.order-row{padding:8px;gap:8px;font-size:.875rem}.order-row .icon-button{width:40px;height:44px;padding:8px}.quiz-card .actions{gap:8px}.quiz-card .button{padding-inline:12px}.setting-row{flex-wrap:wrap;gap:10px}.setting-row>label{flex-basis:100%}.setting-row input:not([type=checkbox]),.setting-row select{max-width:100%}.auth-main{padding:32px 16px}.auth-layout{display:flex;flex-direction:column;gap:28px;align-items:stretch}.auth-intro h1{font-size:2.5rem;margin:12px 0}.auth-intro p,.auth-facts{display:none}.auth-card{padding:24px}.auth-intro .text-link{font-size:.875rem}.auth-card h2{font-size:1.5rem}.account-data{grid-template-columns:1fr;gap:16px}.table-scroll th,.table-scroll td{padding:10px 8px}.timer{font-size:1.125rem}.quiz-head .button{padding:8px;font-size:.75rem;min-height:40px}.toast{bottom:calc(90px + env(safe-area-inset-bottom));width:max-content}.persistent-warning{bottom:calc(68px + env(safe-area-inset-bottom))}dialog{margin:auto 0 0;max-width:none;width:100%;border-radius:16px 16px 0 0;padding:24px 20px;max-height:90dvh}.dialog-actions>.button{flex:1}.heatmap{grid-template-rows:repeat(7,12px);gap:3px}.heat-cell{width:12px}.editor-fullscreen{position:fixed;inset:0;z-index:45;background:var(--surface);padding:16px;display:flex;flex-direction:column;gap:12px}.editor-fullscreen textarea{flex:1;min-height:0}.editor-fullscreen .editor-done{display:block;align-self:end}.focus-mode .topbar .header-actions>a{display:none}.editor-fullscreen~*{visibility:hidden}}
@media(max-width:359px){.workspace{padding-inline:12px}.topbar{padding-inline:12px}.brand>span:last-child{display:none}.bottom-nav .nav-link{padding-inline:5px;min-width:44px}.page-heading{flex-wrap:wrap}.quiz-card{padding-inline:12px}}
@media(pointer:coarse){.icon-button{min-width:48px;min-height:48px}.button{min-height:48px}.chip{min-height:40px}.topbar .icon-button{min-width:40px}.order-row .icon-button{min-width:44px}.avatar{min-width:44px;min-height:44px}}
@media(max-height:499px) and (orientation:landscape){.focus-mode .bottom-nav{display:none}.answer-actions{padding-block:6px}.answer-actions .button{min-height:40px}.feedback-sheet{bottom:60px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}[data-reduce-motion=true] *,[data-reduce-motion=true] *:before{animation:none!important;transition:none!important;scroll-behavior:auto!important}
@media print{.topbar,.sidebar,.bottom-nav,.context,.answer-actions{display:none}.workspace{display:block;padding:0}.card{break-inside:avoid}body{background:white;color:black}}
.matching-pool{background:var(--surface-2);padding:16px;border:1px solid var(--border);border-radius:10px;margin-bottom:12px}.matching-pool .chip{background:var(--surface);text-align:left}.matching-row[data-match-slot]{border-radius:6px}.matching-row[data-match-slot]:hover{background:var(--surface-2)}.sheet-toggle{display:none}@media(max-width:599px){.sheet-toggle{display:block}}