:root{color-scheme:light;--bg: oklch(.965 .004 245);--panel: oklch(.995 .002 245);--panel-2: oklch(.945 .009 245);--ink: oklch(.2 .024 250);--muted: oklch(.43 .025 250);--line: oklch(.86 .012 245);--accent: oklch(.47 .115 222);--accent-2: oklch(.58 .11 168);--warn: oklch(.61 .15 55);--focus: oklch(.58 .13 222);--radius: 10px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}html{min-height:100%;background:var(--bg)}body{min-width:320px;min-height:100vh;margin:0;color:var(--ink);background:var(--bg)}button,input,select{font:inherit}button{color:inherit}button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid color-mix(in oklch,var(--focus),transparent 60%);outline-offset:2px}.app-shell{display:grid;grid-template-columns:334px minmax(0,1fr);min-height:100vh}.app-shell[data-mode=library]{--bg: oklch(.972 .006 205);--panel: oklch(.997 .002 205);--panel-2: oklch(.94 .013 205);--ink: oklch(.21 .028 220);--muted: oklch(.42 .025 220);--line: oklch(.84 .014 205);--accent: oklch(.43 .105 205);--accent-2: oklch(.52 .11 150)}.app-shell[data-mode=impact]{--bg: oklch(.18 .025 254);--panel: oklch(.235 .028 254);--panel-2: oklch(.285 .035 254);--ink: oklch(.95 .006 245);--muted: oklch(.72 .025 245);--line: oklch(.39 .036 254);--accent: oklch(.72 .16 190);--accent-2: oklch(.74 .14 310);--focus: oklch(.74 .16 190);background:radial-gradient(circle at 72% 18%,oklch(.47 .12 190 / .2),transparent 34%),radial-gradient(circle at 18% 80%,oklch(.42 .12 310 / .22),transparent 34%),var(--bg)}.side-panel{position:sticky;top:0;height:100vh;overflow:auto;padding:22px 18px;color:#eff2f5;background:#131e29}[data-mode=library] .side-panel{color:var(--ink);background:#f7fbfc;border-right:1px solid var(--line)}[data-mode=impact] .side-panel{background:#060e18f0;border-right:1px solid var(--line)}.brand-lockup{display:flex;align-items:center;gap:12px;margin-bottom:18px}.brand-mark{display:grid;width:42px;height:42px;place-items:center;border:1px solid color-mix(in oklch,var(--accent),white 22%);border-radius:9px;background:color-mix(in oklch,var(--accent),black 45%);color:#fff;font-weight:850}[data-mode=library] .brand-mark{background:var(--panel);color:var(--accent)}.brand-lockup p,.kicker,.section-title p,.panel-head p,.source-chip,.metric span,.topic-button small,.question-map-row small,.archive-item small,.practice-item span{margin:0;color:var(--muted)}.side-panel .brand-lockup p,.side-panel .topic-button small{color:#9fa9b3}[data-mode=library] .side-panel .brand-lockup p,[data-mode=library] .side-panel .topic-button small{color:var(--muted)}.brand-lockup h1{margin:1px 0 0;font-size:1rem;line-height:1.2}.mode-switch{display:grid;gap:6px;margin-bottom:14px}.mode-switch button{display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:42px;padding:8px 10px;border:1px solid transparent;border-radius:8px;color:inherit;background:transparent;cursor:pointer}.mode-switch button:hover,.mode-switch button.active{border-color:var(--line);background:color-mix(in oklch,var(--panel-2),transparent 24%)}.mode-switch span{color:var(--muted);font-size:.78rem}.search-box{display:flex;align-items:center;gap:8px;min-height:40px;padding:0 11px;border:1px solid color-mix(in oklch,var(--line),black 18%);border-radius:8px;background:color-mix(in oklch,var(--panel),black 6%)}[data-mode=console] .search-box,[data-mode=impact] .search-box{background:#0b121a}.search-box input{width:100%;border:0;color:inherit;background:transparent}.search-box input::placeholder{color:var(--muted)}.topic-nav{display:flex;flex-direction:column;gap:6px;margin-top:18px}.topic-button{display:grid;grid-template-columns:20px minmax(0,1fr) 16px;align-items:center;gap:9px;width:100%;min-height:58px;padding:9px 10px;border:1px solid transparent;border-radius:8px;background:transparent;text-align:left;cursor:pointer}[data-mode=console] .topic-button,[data-mode=impact] .topic-button{color:#e9ebee}.topic-button:hover,.topic-button.active{border-color:var(--line);background:color-mix(in oklch,var(--panel-2),transparent 30%)}[data-mode=impact] .topic-button.active{border-color:var(--accent);box-shadow:inset 0 0 0 1px color-mix(in oklch,var(--accent),transparent 56%)}.topic-button span{min-width:0}.topic-button strong,.topic-button small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topic-button strong{font-size:.9rem}.topic-button small{margin-top:2px;font-size:.75rem}.workspace{min-width:0;padding:22px}.topbar{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:18px}.kicker{font-size:.88rem}.topbar h2{max-width:820px;margin:5px 0 0;font-size:1.55rem;line-height:1.18;text-wrap:balance}[data-mode=impact] .topbar h2{font-size:1.8rem;color:var(--ink)}.progress-box{display:grid;gap:7px;min-width:150px;padding:12px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel)}.progress-box span{font-weight:850}.progress-track{height:8px;overflow:hidden;border-radius:999px;background:var(--panel-2)}.progress-track div{height:100%;border-radius:inherit;background:var(--accent-2);transition:width .18s ease-out}.metrics-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-bottom:12px}.metric,.detail-panel,.practice-panel,.paper-panel,.archive-panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel)}[data-mode=impact] .metric,[data-mode=impact] .detail-panel,[data-mode=impact] .practice-panel,[data-mode=impact] .paper-panel{background:#151f2beb}.metric{display:grid;grid-template-columns:24px 1fr;gap:5px 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span{color:var(--accent);font-size:.82rem;font-weight:800}@media(max-width:1040px){.app-shell{grid-template-columns:1fr}.side-panel{position:static;height:auto}.mode-switch,.topic-nav{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}.main-grid,.detail-columns,.metrics-grid{grid-template-columns:1fr}}@media(max-width:640px){.workspace,.side-panel{padding:16px}.topbar,.panel-head,.section-title{flex-direction:column}.progress-box,.complete-button,.paper-select{width:100%}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}