:root{--paper: oklch(.947 .008 92);--paper-raised: oklch(.974 .006 92);--ink: oklch(.205 .014 60);--ink-2: oklch(.42 .016 60);--ink-3: oklch(.6 .014 66);--ink-4: oklch(.72 .01 66);--rule: oklch(.84 .01 82);--rule-strong: oklch(.66 .014 74);--blue: oklch(.5 .16 252);--blue-light: oklch(.93 .04 252);--vermillion: oklch(.57 .2 32);--vermillion-light: oklch(.94 .05 32);--green: oklch(.46 .08 155);--green-light: oklch(.93 .04 155);--bg: var(--paper);--surface: var(--paper-raised);--surface-raised: oklch(.985 .004 92);--border: var(--rule);--border-subtle: oklch(.89 .008 88);--accent: var(--blue);--accent-light: var(--blue-light);--accent-hover: oklch(.44 .17 252);--accent-ink: oklch(1 0 0);--red: var(--vermillion);--red-light: var(--vermillion-light);--red-ink: oklch(1 0 0);--green-ink: oklch(1 0 0);--amber: oklch(.65 .14 72);--amber-light: oklch(.95 .05 72);--teal: oklch(.52 .12 195);--teal-light: oklch(.93 .04 195);--font-serif: "Instrument Serif", Georgia, serif;--font-body: "Newsreader", Georgia, serif;--font-mono: "JetBrains Mono", "Fira Mono", monospace;--font-sans: var(--font-body);--sp-1: 4px;--sp-2: 8px;--sp-3: 12px;--sp-4: 16px;--sp-6: 24px;--sp-8: 32px;--sp-12: 48px;--r-sm: 2px;--r-md: 4px;--r-lg: 4px;--shadow-sheet: 0 3px 26px oklch(.3 .02 60 / .13);--shadow-sm: none;--shadow-md: none;--sidebar-bg: var(--paper);--sidebar-hover: oklch(.93 .009 88);--sidebar-active: oklch(.93 .009 88);--sidebar-border: var(--rule);--sidebar-ink: var(--ink-2);--sidebar-ink-dim: var(--ink-4);--sidebar-ink-active: var(--ink)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;font-family:var(--font-body);color:var(--ink);background:var(--paper);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}button{cursor:pointer;font:inherit}input,textarea,select{font:inherit}a{color:inherit;text-decoration:none}:where(a,button,input,textarea,select,[role=button],[tabindex]):focus-visible{outline:3px solid var(--blue);outline-offset:3px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.app-shell{display:flex;height:100vh;overflow:hidden}.main-area{flex:1;display:flex;flex-direction:column;min-width:0;overflow:hidden}.main-content{flex:1;overflow-y:auto;padding:28px 32px}.sidebar{width:216px;flex-shrink:0;background:var(--paper);display:flex;flex-direction:column;border-right:1px solid var(--rule);overflow-y:auto}.sidebar-logo{display:flex;align-items:center;gap:10px;padding:20px 18px 16px;border-bottom:1px solid var(--rule)}.sidebar-logo-mark{width:13px;height:13px;background:var(--vermillion);flex-shrink:0}.sidebar-logo-text{font-family:var(--font-serif);font-size:22px;font-weight:400;color:var(--ink);letter-spacing:-.01em;line-height:1}.sidebar-logo-badge{font-family:var(--font-mono);font-size:9px;font-weight:500;text-transform:uppercase;letter-spacing:.12em;color:var(--ink-4);margin-left:auto}.sidebar-nav{flex:1;padding:10px 0}.sidebar-group{margin-bottom:2px}.sidebar-group-label{font-family:var(--font-mono);font-size:9px;font-weight:500;text-transform:uppercase;letter-spacing:.14em;color:var(--ink-4);padding:10px 16px 4px}.sidebar-group-toggle{width:100%;display:flex;align-items:center;justify-content:space-between;border:0;background:none;cursor:pointer;font-family:var(--font-mono);font-size:9px;font-weight:500;text-transform:uppercase;letter-spacing:.14em;color:var(--ink-4);padding:10px 16px 4px}.sidebar-item{display:flex;align-items:center;gap:9px;padding:7px 16px;font-family:var(--font-body);font-size:13px;font-weight:400;color:var(--ink-2);cursor:pointer;border:none;background:none;width:100%;text-align:left;position:relative;transition:background .08s,color .08s;border-radius:0;text-decoration:none}.sidebar-item:hover{background:var(--sidebar-hover);color:var(--ink)}.sidebar-item.active{background:var(--sidebar-active);color:var(--ink);font-weight:500}.sidebar-item.active:before{content:"";position:absolute;left:0;top:5px;bottom:5px;width:2px;background:var(--vermillion)}.sidebar-item.disabled{opacity:.35;cursor:not-allowed;pointer-events:none}.sidebar-item-badge{margin-left:auto;font-family:var(--font-mono);font-size:10px;font-weight:500;color:var(--vermillion);letter-spacing:.04em}.sidebar-coming-badge{margin-left:auto;font-family:var(--font-mono);font-size:9px;letter-spacing:.04em;color:var(--ink-4)}.sidebar-footer{padding:14px 16px;border-top:1px solid var(--rule);display:flex;align-items:center;gap:10px}.sidebar-avatar{width:28px;height:28px;background:var(--ink);display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-size:11px;font-weight:500;color:var(--paper);flex-shrink:0}.sidebar-user-info{min-width:0}.sidebar-user-name{font-family:var(--font-body);font-size:12px;font-weight:500;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-user-role{font-family:var(--font-mono);font-size:10px;color:var(--ink-4);letter-spacing:.04em}.mobile-nav-toggle,.sidebar-backdrop{display:none}.topbar{display:flex;align-items:center;gap:16px;padding:13px 28px;background:var(--paper);border-bottom:1.5px solid var(--rule-strong);flex-shrink:0}.topbar-greeting{font-family:var(--font-body);font-size:15px;font-weight:400;color:var(--ink)}.topbar-section-label{font-family:var(--font-mono);font-size:10px;font-weight:500;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3)}.topbar-right{margin-left:auto;display:flex;align-items:center;gap:10px}.topbar-search{display:flex;align-items:center;gap:8px;background:transparent;border:1px solid var(--rule);border-radius:var(--r-md);padding:5px 11px;font-family:var(--font-body);font-size:13px;color:var(--ink-3);cursor:pointer;min-width:170px;transition:border-color .1s}.topbar-search:hover{border-color:var(--ink-4)}.topbar-search kbd{margin-left:auto;font-family:var(--font-mono);font-size:10px;color:var(--ink-4);letter-spacing:.04em}.topbar-icon-btn{width:32px;height:32px;border-radius:var(--r-md);border:1px solid var(--rule);background:transparent;display:flex;align-items:center;justify-content:center;color:var(--ink-3);transition:background .1s,border-color .1s;position:relative}.topbar-icon-btn:hover{background:var(--sidebar-hover);border-color:var(--rule-strong)}.topbar-notif-dot{position:absolute;top:5px;right:5px;width:5px;height:5px;background:var(--vermillion);border:1.5px solid var(--paper)}.topbar-create-btn{display:flex;align-items:center;gap:6px;padding:6px 14px;background:var(--ink);color:var(--paper);border:none;border-radius:var(--r-md);font-family:var(--font-body);font-size:13px;font-weight:500;transition:background .1s}.topbar-create-btn:hover{background:var(--ink-2)}.topbar-create-menu{position:relative}.topbar-create-popover{position:absolute;z-index:30;top:calc(100% + 8px);right:0;width:250px;padding:6px;border:1px solid var(--rule-strong);border-radius:3px;background:var(--paper);box-shadow:0 12px 28px #1e1a1529}.topbar-create-option{width:100%;display:flex;align-items:flex-start;gap:9px;padding:9px 10px;border:0;border-radius:2px;background:transparent;color:var(--ink-2);cursor:pointer;text-align:left}.topbar-create-option:hover{background:var(--sidebar-hover);color:var(--ink)}.topbar-create-option span{display:flex;flex-direction:column;gap:2px}.topbar-create-option strong{font-family:var(--font-body);font-size:13px;font-weight:600}.topbar-create-option small{font-family:var(--font-body);font-size:11px;color:var(--ink-4)}.class-dialog-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:80;display:grid;place-items:center;padding:24px;background:#1c16112e}.class-dialog{width:min(100%,460px);padding:24px;border:1px solid var(--rule-strong);background:var(--paper-raised);box-shadow:var(--shadow-sheet)}.class-dialog-header{display:flex;justify-content:space-between;gap:16px;margin-bottom:22px}.class-dialog-title{font-family:var(--font-serif);font-size:28px;line-height:1.1}.class-dialog-header p{margin-top:6px;color:var(--ink-3);font-size:14px}.class-dialog-close{width:30px;height:30px;display:grid;place-items:center;border:1px solid var(--rule);background:transparent;color:var(--ink-3)}.class-dialog-close:hover{color:var(--ink);border-color:var(--rule-strong)}.class-dialog-field{display:grid;gap:6px;margin-top:14px}.class-dialog-field span{font-family:var(--font-mono);font-size:10px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3)}.class-dialog-field em{font-style:normal;color:var(--ink-4)}.class-dialog-field input{width:100%;padding:9px 10px;border:1px solid var(--rule-strong);border-radius:0;background:var(--paper);color:var(--ink);font-size:15px}.class-dialog-field input::placeholder{color:var(--ink-4)}.class-dialog-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:24px}.card{background:var(--paper-raised);border:1px solid var(--rule);border-radius:var(--r-md);padding:18px 20px}.card-title{font-family:var(--font-mono);font-size:10px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin-bottom:14px;display:flex;align-items:center;justify-content:space-between}.card-title-action{font-family:var(--font-body);font-size:12px;font-weight:400;color:var(--blue);cursor:pointer;letter-spacing:0;text-transform:none}.stat-number{font-family:var(--font-mono);font-size:28px;font-weight:700;color:var(--ink);line-height:1}.stat-label{font-family:var(--font-body);font-size:12px;color:var(--ink-3);margin-top:5px}.stat-delta{font-family:var(--font-mono);font-size:11px;font-weight:500;display:flex;align-items:center;gap:3px;margin-top:6px}.stat-delta.up{color:var(--green)}.stat-delta.neutral{color:var(--ink-3)}.badge{display:inline-flex;align-items:center;gap:4px;padding:2px 7px;border-radius:var(--r-sm);font-family:var(--font-mono);font-size:10px;font-weight:500;letter-spacing:.04em;border:1px solid currentColor}.badge-green{color:var(--green);border-color:var(--green);background:var(--green-light)}.badge-amber{color:#764b00;color:oklch(.45 .12 72);border-color:#cc9140;background:var(--amber-light)}.badge-red{color:var(--vermillion);border-color:var(--vermillion);background:var(--vermillion-light)}.badge-teal{color:var(--teal);border-color:var(--teal);background:var(--teal-light)}.badge-accent{color:var(--blue);border-color:var(--blue);background:var(--blue-light)}.badge-ink{color:var(--ink-3);border-color:var(--rule-strong);background:transparent}.diff-easy{color:var(--green);border-color:var(--green);background:var(--green-light)}.diff-medium{color:#764b00;color:oklch(.45 .12 72);border-color:#cc9140;background:var(--amber-light)}.diff-hard{color:var(--vermillion);border-color:var(--vermillion);background:var(--vermillion-light)}.diff-mixed{color:var(--ink-3);border-color:var(--rule-strong);background:transparent}.btn{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:var(--r-md);font-family:var(--font-body);font-size:13px;font-weight:500;border:1px solid transparent;transition:background .08s,border-color .08s,color .08s;cursor:pointer}.btn-primary{background:var(--ink);color:var(--paper);border-color:var(--ink)}.btn-primary:hover{background:var(--ink-2);border-color:var(--ink-2)}.btn-primary:disabled{background:var(--ink-4);border-color:var(--ink-4);color:var(--paper);cursor:not-allowed}.btn-secondary{background:transparent;color:var(--ink-2);border-color:var(--rule-strong)}.btn-secondary:hover{background:var(--sidebar-hover);color:var(--ink)}.btn-ghost{background:transparent;color:var(--ink-3);border-color:transparent}.btn-ghost:hover{color:var(--ink);background:var(--sidebar-hover)}.btn-sm{padding:4px 10px;font-size:12px}.btn-danger{background:var(--vermillion-light);color:var(--vermillion);border-color:var(--vermillion)}.btn-danger:hover{background:var(--vermillion);color:var(--paper)}.input{background:var(--paper-raised);border:1px solid var(--rule-strong);border-radius:var(--r-md);padding:7px 11px;font-family:var(--font-body);font-size:15px;color:var(--ink);outline:none;transition:border-color .1s}.input:focus{border-color:var(--blue)}.input::placeholder{color:var(--ink-4)}.toggle{position:relative;width:36px;height:20px;flex-shrink:0}.toggle input{opacity:0;width:0;height:0;position:absolute}.toggle-track{position:absolute;top:0;right:0;bottom:0;left:0;background:var(--rule-strong);border-radius:10px;cursor:pointer;transition:background .2s}.toggle input:checked+.toggle-track{background:var(--ink)}.toggle input:focus-visible+.toggle-track{outline:3px solid var(--blue);outline-offset:3px}.toggle-track:after{content:"";position:absolute;left:3px;top:3px;width:14px;height:14px;background:var(--paper);border-radius:50%;transition:transform .2s}.toggle input:checked+.toggle-track:after{transform:translate(16px)}.divider{height:1px;background:var(--rule);margin:14px 0}.section-heading{font-family:var(--font-mono);font-size:10px;font-weight:500;text-transform:uppercase;letter-spacing:.14em;color:var(--ink-4);margin-bottom:12px}.kpi-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin-bottom:24px}.two-col-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.coming-soon-page{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;gap:16px;color:var(--ink-4)}.coming-soon-page h2{font-family:var(--font-serif);font-size:24px;font-weight:400;color:var(--ink-2)}.coming-soon-page p{font-family:var(--font-body);font-size:15px;max-width:360px;text-align:center;line-height:1.6;color:var(--ink-3)}.katex{font-size:1em}.katex-display{margin:0}@media print{.app-shell{display:block}.sidebar,.topbar,.no-print{display:none!important}.main-content{padding:0;overflow:visible}.worksheet-center{padding:0!important;background:#fff!important;display:block!important;overflow:visible!important}.worksheet-paper{box-shadow:none!important;border:none!important;border-radius:0!important;max-width:100%!important;width:100%!important;min-height:0!important}.curriculum-config{display:none!important}.curriculum-preview{padding:0!important;background:#fff!important;display:block!important}.curriculum-paper{box-shadow:none!important;max-width:100%!important;padding:0!important}@page{size:Letter;margin:.75in}}.landing{min-height:100vh;min-height:100svh;background:var(--paper);display:flex;flex-direction:column}.landing-header{display:flex;align-items:center;justify-content:space-between;padding:22px 48px;border-bottom:1px solid var(--rule)}.landing-wordmark{display:flex;align-items:center;gap:10px}.landing-wordmark-square{width:13px;height:13px;background:var(--vermillion);flex-shrink:0}.landing-wordmark-text{font-family:var(--font-serif);font-size:22px;font-weight:400;color:var(--ink);letter-spacing:-.01em;line-height:1}.landing-signin-link{font-family:var(--font-body);font-size:13px;color:var(--ink-2);text-decoration:underline;text-underline-offset:2px}.landing-hero{max-width:640px;margin:0 auto;padding:104px 48px 88px;text-align:center}.landing-eyebrow{font-family:var(--font-mono);font-size:10px;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3);margin-bottom:20px}.landing-hero-mark{display:flex;justify-content:center;margin-bottom:28px}.landing-hero h1{font-family:var(--font-serif);font-weight:400;font-size:clamp(34px,6vw,56px);line-height:1.1;letter-spacing:-.015em;color:var(--ink);margin-bottom:10px}.landing-hero-supporting{font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);margin-bottom:28px}.landing-hero-sub{font-family:var(--font-body);font-size:18px;line-height:1.6;color:var(--ink-2);max-width:520px;margin:0 auto 14px}.landing-hero-grounding{font-family:var(--font-body);font-style:italic;font-size:15px;line-height:1.6;color:var(--ink-3);max-width:480px;margin:0 auto 36px}.landing-cta-row{display:flex;flex-direction:column;align-items:center;gap:10px}.landing-cta-micro{font-family:var(--font-mono);font-size:11px;letter-spacing:.04em;color:var(--ink-4)}.landing-problems{max-width:760px;margin:0 auto;padding:0 48px 96px;width:100%;box-sizing:border-box}.landing-problems-heading{font-family:var(--font-mono);font-size:10px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-4);padding-bottom:14px;border-bottom:1.5px solid var(--rule-strong);margin-bottom:4px}.landing-problem-row{display:grid;grid-template-columns:32px 1fr 1fr;gap:28px;padding:28px 0;border-bottom:1px solid var(--rule);align-items:baseline}.landing-problem-num{font-family:var(--font-mono);font-size:12px;color:var(--ink-4)}.landing-problem-quote{font-family:var(--font-body);font-style:italic;font-size:20px;line-height:1.4;color:var(--ink)}.landing-problem-answer{font-family:var(--font-body);font-size:14px;line-height:1.6;color:var(--ink-2)}.landing-closing{border-top:1px solid var(--rule);padding:64px 48px;text-align:center}.landing-closing h2{font-family:var(--font-serif);font-weight:400;font-size:28px;color:var(--ink);margin-bottom:24px}.landing-footer{display:flex;align-items:center;justify-content:space-between;padding:20px 48px;border-top:1px solid var(--rule);font-family:var(--font-mono);font-size:10px;letter-spacing:.04em;color:var(--ink-4)}.landing-footer a{text-decoration:underline;text-underline-offset:2px}@media (max-width: 640px){.landing-header{padding:16px 20px}.landing-hero{padding:56px 20px}.landing-hero-sub{font-size:16px}.landing-problems{padding:0 20px 56px}.landing-problem-row{grid-template-columns:24px 1fr;grid-template-areas:"num quote" ". answer";row-gap:10px;padding:22px 0}.landing-problem-num{grid-area:num}.landing-problem-quote{grid-area:quote;font-size:18px}.landing-problem-answer{grid-area:answer}.landing-closing{padding:48px 20px}.landing-footer{padding:16px 20px;flex-direction:column;gap:8px;align-items:flex-start}}@media (max-width: 768px){.app-shell{height:auto;min-height:100vh;overflow:visible}.main-area{min-height:100vh;overflow:visible}.sidebar{position:fixed;z-index:40;inset:0 auto 0 0;width:min(280px,calc(100vw - 48px));transform:translate(-100%);transition:transform .16s ease;box-shadow:none}.sidebar.open{transform:translate(0);box-shadow:12px 0 28px #1e1a152e}.mobile-nav-toggle{display:inline-flex;position:fixed;z-index:50;top:11px;left:11px;width:34px;height:34px;align-items:center;justify-content:center;padding:0;border:1px solid var(--rule-strong);border-radius:3px;background:var(--paper);color:var(--ink)}.sidebar-backdrop{display:block;position:fixed;z-index:35;top:0;right:0;bottom:0;left:0;border:0;background:#1e1a153d}.topbar{padding-left:58px;padding-right:16px;gap:10px}.benchmark-page-layout{flex-direction:column;overflow:visible!important}.benchmark-register{width:100%!important;flex:0 0 auto!important;max-height:260px;border-right:0!important;border-bottom:1px solid var(--rule-strong)}.benchmark-detail-pane{min-height:0;overflow-x:auto!important;overflow-y:visible!important}}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--rule-strong);border-radius:2px}::-webkit-scrollbar-thumb:hover{background:var(--ink-4)}