@media (max-width:980px){.reading-section-check{display:none}.reading{grid-template-columns:minmax(0,1fr)}.read-ai,.read-nav{display:none}.read-main{grid-column:1;padding:32px clamp(16px,5vw,28px) 120px}.ai-fab{display:flex;position:fixed;bottom:22px;right:22px;z-index:60;align-items:center;gap:9px;padding:14px 20px;border-radius:99px;background:var(--accent);color:oklch(.98 .01 80);border:none;box-shadow:var(--shadow-lg);font-size:14px;font-weight:500}.settings-grid{grid-template-columns:1fr}.settings-nav{flex-direction:row;overflow-x:auto;position:static;padding-bottom:6px}.settings-nav button{white-space:nowrap}}@media (min-width:981px){.reading-action-sidecar .action-sequence{display:none}}@media (max-width:720px){.nav-links .nav-link.hide-sm{display:none}.today{padding:26px 22px}.today-greet{font-size:22px}.today-stats{margin-left:0;width:100%}.book-hero-cover{width:92px;height:124px}.sec-foot{flex-direction:column}.sec-foot-btn{min-width:0}.lib-grid{grid-template-columns:1fr 1fr;gap:14px}.book-add{min-height:180px}.proj-grid,.src-grid{grid-template-columns:1fr}.teach-banner{flex-direction:column;align-items:flex-start;gap:14px}.teach-banner .tb-cta{width:100%;justify-content:center}}@media (max-width:480px){.nav{gap:4px;padding:0 8px}.nav-brand{gap:0;font-size:0}.nav-spring{min-width:0;max-width:0}.avatar,.lang-toggle{display:none}.nav-links{gap:0;min-width:0}.nav-links .nav-link{display:inline-block;padding:7px 4px;font-size:11px}.read-topbar{gap:8px;padding-inline:12px}.teach-cta{padding:9px;font-size:0}.teach-cta svg{width:15px;height:15px}.lib-grid{grid-template-columns:1fr}}.sheet-backdrop{position:fixed;inset:0;background:oklch(.2 .02 60/.4);z-index:70;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.sheet{position:fixed;left:0;right:0;bottom:0;z-index:71;background:var(--surface);border-radius:var(--r-xl) var(--r-xl) 0 0;max-height:82vh;display:flex;flex-direction:column;box-shadow:var(--shadow-lg);animation:sheetUp .3s cubic-bezier(.2,.7,.2,1)}@keyframes sheetUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}.sheet-grip{width:40px;height:4px;border-radius:99px;background:var(--line);margin:12px auto 4px}.sheet-close{position:absolute;top:8px;right:12px;z-index:1}.drawer-backdrop{position:fixed;inset:0;background:oklch(.2 .02 60/.4);z-index:70}.drawer{position:fixed;top:0;bottom:0;left:0;width:280px;z-index:71;background:var(--surface);box-shadow:var(--shadow-lg);padding:24px 18px;overflow-y:auto;animation:drawerIn .26s cubic-bezier(.2,.7,.2,1)}.drawer-close{margin-left:auto;margin-bottom:8px}.drawer[hidden]{display:none}@keyframes drawerIn{0%{transform:translateX(-100%)}to{transform:translateX(0)}}:where(a,button,input,textarea,select,[tabindex]):focus-visible{outline:3px solid var(--accent);outline-offset:3px}.fade-in{animation:fadeIn .38s cubic-bezier(.2,.7,.2,1)}@keyframes fadeIn{0%{transform:translateY(7px)}to{transform:none}}@media (prefers-reduced-motion:reduce){.fade-in{animation:none}}