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6}.lg\:mt-16{margin-top:4rem}.lg\:block{display:block}.lg\:hidden{display:none}.lg\:grid-cols-12{grid-template-columns:repeat(12,minmax(0,1fr))}.lg\:grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.lg\:grid-cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.lg\:grid-cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}.lg\:gap-16{gap:4rem}.lg\:px-8{padding-left:2rem;padding-right:2rem}.lg\:pt-10{padding-top:2.5rem}.lg\:text-left{text-align:left}.lg\:text-7xl{font-size:4.5rem;line-height:1}}:root{--color-background:#f0f7ff;--color-surface:#fff;--color-surface-muted:#f6f9ff;--color-foreground:#162033;--color-muted-foreground:#66758b;--color-primary:#2563eb;--color-primary-strong:#1d4ed8;--color-primary-soft:#e8f0fe;--color-on-primary:#fff;--color-border:#dce8f7;--color-border-strong:#bfd2ee;--color-focus:#2563eb;--color-sidebar:#fff;--color-sidebar-strong:#f6f9ff;--color-sidebar-text:#162033;--color-sidebar-muted:#66758b;--color-sidebar-hover:#edf4ff;--color-sidebar-active:#2563eb;--font-body:"Outfit", 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#00000047;--shadow-dialog:0 28px 90px #0000008c}html,body{background:var(--color-background)}body{transition:background-color .24s,color .24s}.app-shell{background:radial-gradient(circle at 74% -10%, #60a5fa29, transparent 30rem), var(--color-background)}.app-sidebar{border-right:1px solid var(--color-border);background:color-mix(in srgb, var(--color-sidebar) 94%, transparent);color:var(--color-sidebar-text);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);padding:1.25rem 1rem;box-shadow:12px 0 36px #2563eb0b}.app-brand{min-height:4.5rem;color:var(--color-sidebar-text);padding:.25rem .5rem 1.25rem;text-decoration:none}.app-brand:hover{color:var(--color-sidebar-text)}.app-brand__mark{background:var(--color-primary);color:#fff;border:0;border-radius:.75rem;width:2.6rem;height:2.6rem;box-shadow:0 6px 14px #2563eb3d}.app-brand__name,.app-topbar__brand{color:var(--color-sidebar-text);font-size:1.18rem;font-weight:800}.app-brand__subtitle{color:var(--color-sidebar-muted)}.app-nav__label{color:var(--color-sidebar-muted);letter-spacing:.14em;text-transform:uppercase;margin:.85rem .75rem .55rem;font-size:.69rem;font-weight:800}.app-nav{margin-top:0}.app-nav ul{gap:.42rem}.app-nav__link{min-height:3.1rem;color:var(--color-sidebar-muted);border:1px solid #0000;border-radius:.8rem;padding:.72rem .85rem;font-weight:650;position:relative}.app-nav__link:hover{border-color:color-mix(in srgb, var(--color-primary) 10%, transparent);background:var(--color-sidebar-hover);color:var(--color-sidebar-text)}.app-nav__link.is-active{background:var(--color-sidebar-active);color:#fff;border-color:#ffffff2e;transform:translateY(-2px);box-shadow:0 4px #1d4ed8,0 12px 24px #2563eb33,inset 0 1px 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#1d4ed8}.button--secondary{border-color:var(--color-border-strong);background:var(--color-surface);color:var(--color-primary-strong);box-shadow:0 3px 0 var(--color-primary-soft)}.button--secondary:hover:not(:disabled),.button--ghost:hover:not(:disabled){border-color:color-mix(in srgb, var(--color-primary) 28%, var(--color-border));background:var(--color-primary-soft)}.icon-button{border-radius:.75rem}input,select,textarea{border-color:var(--color-border-strong);background:var(--color-surface);border-radius:.8rem;box-shadow:inset 0 1px 2px #2563eb08}input:hover:not(:disabled),select:hover:not(:disabled),textarea:hover:not(:disabled){border-color:color-mix(in srgb, var(--color-primary) 42%, 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input:focus-visible{box-shadow:none}.library-upload-success{justify-content:space-between;align-items:center}.library-workspace{order:3;grid-template-columns:minmax(13.5rem,.72fr) minmax(0,2fr);align-items:start;gap:1.25rem;display:grid}.library-browser,.library-material-panel{border:1px solid color-mix(in srgb, var(--color-primary) 11%, var(--color-border));border-radius:var(--radius-md);background:color-mix(in srgb, var(--color-surface) 97%, transparent);min-width:0;box-shadow:var(--shadow-sm)}.library-browser{padding:1rem;position:sticky;top:1rem}.library-browser__header,.library-material-panel__header{border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:end;gap:1rem;padding-bottom:1rem;display:flex}.library-browser__header h2,.library-material-panel__header h2{margin-top:.2rem;font-size:clamp(1.35rem,2vw,1.75rem)}.library-notebook-list{gap:.5rem;margin-top:.85rem;display:grid}.library-notebook-item{transition:border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);background:0 0;border:1px solid #0000;border-radius:.8rem;grid-template-columns:minmax(0,1fr) auto;align-items:center;display:grid}.library-notebook-item:hover,.library-notebook-item:focus-within{border-color:var(--color-border);background:var(--color-surface-muted)}.library-notebook-item.is-active{border-color:color-mix(in srgb, var(--color-primary) 48%, var(--color-border));background:var(--color-primary-soft);box-shadow:inset 0 0 0 1px #2563eb0f}.library-notebook-select{min-width:0;color:var(--color-foreground);text-align:left;background:0 0;border:0;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:.7rem;padding:.65rem;display:grid}.library-notebook-select>span:last-child{gap:.08rem;min-width:0;display:grid}.library-notebook-select strong{text-overflow:ellipsis;white-space:nowrap;font-size:.94rem;overflow:hidden}.library-notebook-select 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