.gradus-shell{min-height:100dvh;display:flex;flex-direction:column;background:var(--page);color:var(--ink-95);font-family:var(--font-sans);--shell-bottom-nav-h:calc(56px + env(safe-area-inset-bottom, 0px))}.gradus-shell-rail{display:none}.gradus-shell-colwrap{display:flex;flex-direction:column;flex:1;min-width:0}.gradus-shell-main{flex:1;width:100%;max-width:var(--space-container-max);margin:0 auto;padding:20px 16px calc(40px + var(--shell-bottom-nav-h))}.gradus-shell-topbar{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--page) 86%,transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:var(--border-hair);display:flex;align-items:center;gap:12px;padding:11px 16px}.gradus-shell-mobile-brand{display:inline-flex;align-items:center;gap:8px}.gradus-shell-bottom{position:fixed;left:0;right:0;bottom:0;z-index:40;background:var(--paper);border-top:var(--border-hair);display:flex;padding:6px 4px env(safe-area-inset-bottom,6px)}@media (min-width:900px){.gradus-shell{flex-direction:row}.gradus-shell-rail{display:flex;flex-direction:column;gap:4px;width:208px;flex-shrink:0;border-right:var(--border-hair);padding:18px 11px;position:sticky;top:0;height:100dvh;background:var(--sidebar);overflow-y:auto;overscroll-behavior:contain}}.gradus-shell-chapter{display:flex;flex-direction:column;margin-top:8px;padding-top:10px;border-top:var(--border-hair)}@media (min-width:900px){.gradus-shell-bottom,.gradus-shell-mobile-brand{display:none}.gradus-shell{--shell-bottom-nav-h:0px}.gradus-shell-main{padding:28px 40px 60px}}@keyframes gradusVeilIn{0%{opacity:0}to{opacity:1}}@keyframes gradusSheetUp{0%{transform:translateY(24px);opacity:.6}to{transform:translateY(0);opacity:1}}@media (min-width:600px){.gradus-upgrade-sheet{align-self:center!important;border-radius:var(--radius-card)!important}}@media (max-width:880px){.ob-split{grid-template-columns:1fr!important}.ob-aside{display:none!important}.shell-pad{padding-left:20px!important;padding-right:20px!important}}.g-fade{animation:gradusFade var(--dur-mid) var(--ease-default)}@keyframes gradusFade{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.gradus-shell.sr-reader-shell--focus .gradus-shell-bottom,.gradus-shell.sr-reader-shell--focus .gradus-shell-rail{display:none}.gradus-shell.sr-reader-shell--focus{flex-direction:column}.gradus-shell.sr-reader-shell--own-rail .gradus-shell-rail{display:none}.gradus-shell.sr-reader-shell--own-rail .gradus-shell-main{max-width:none;padding:0}.gradus-shell.sr-reader-shell--dark{--page:#0e2238;--paper:#15314f;--sidebar:#0b1b2e;--hairline:rgba(255,255,255,0.1);--rule:rgba(255,255,255,0.2);--ink:#21456b;--ink-2:#29527e;--ink-press:#1a3a5c;--ink-95:rgba(236,242,248,0.96);--ink-90:rgba(236,242,248,0.9);--ink-80:rgba(236,242,248,0.8);--ink-75:rgba(236,242,248,0.74);--ink-70:rgba(236,242,248,0.66);--ink-55:rgba(236,242,248,0.52);--ink-40:rgba(236,242,248,0.38);--ink-24:rgba(236,242,248,0.22);--ink-12:rgba(255,255,255,0.1);--ink-06:rgba(255,255,255,0.05);--brass-weak:#e3a07f;--accent-weak:#e3a07f;--brass-2:#e3a07f;--accent-2:#e3a07f;--brass-50:rgba(194,94,62,0.18);--accent-50:rgba(194,94,62,0.18);--brass-100:rgba(194,94,62,0.45);--accent-100:rgba(194,94,62,0.45);--brass-tint:rgba(194,94,62,0.13);--accent-tint:rgba(194,94,62,0.13);--forest:#2e9e6b;--forest-2:#247f55;--forest-50:rgba(46,158,107,0.2);--success:#2e9e6b;--success-2:#247f55;--success-50:rgba(46,158,107,0.2);--success-100:rgba(46,158,107,0.36);--rust:#d2694a;--rust-50:rgba(210,105,74,0.24);--mint:rgba(46,158,107,0.26);--mint-ink:#6fd3a2;--peach:rgba(224,138,92,0.24);--peach-ink:#f0b392;--sand:rgba(255,255,255,0.05);--sand-deep:rgba(255,255,255,0.09);--on-ink:#eceff4;--on-ink-100:#ffffff}