:root{--color-paper: oklch(97% .015 235);--color-paper-2: oklch(93% .02 235);--color-paper-3: oklch(89% .024 235);--color-border: oklch(85% .022 235);--color-ink: oklch(23% .03 255);--color-ink-soft: oklch(45% .026 255);--color-ink-faint: oklch(60% .02 255);--color-accent: oklch(60% .17 235);--color-accent-ink: oklch(99% .006 235);--color-focus: oklch(60% .17 235);--color-danger: oklch(56% .19 25);--hl-azure: oklch(82% .09 235);--hl-amber: oklch(86% .13 85);--hl-sage: oklch(85% .1 150);--hl-rose: oklch(84% .09 350);--font-display: "Fraunces", ui-serif, Georgia, serif;--font-reading: "Literata", ui-serif, Georgia, serif;--font-ui: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--space-3xs: .25rem;--space-2xs: .5rem;--space-xs: .75rem;--space-sm: 1rem;--space-md: 1.5rem;--space-lg: 2rem;--space-xl: 3rem;--space-2xl: 4.5rem;--ease-out: cubic-bezier(.16, 1, .3, 1);--ease-in: cubic-bezier(.7, 0, .84, 0);--ease-in-out: cubic-bezier(.65, 0, .35, 1);--dur-fast: .12s;--dur-base: .2s;--dur-slow: .32s;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--color-paper: oklch(17% .02 250);--color-paper-2: oklch(22% .022 250);--color-paper-3: oklch(27% .024 250);--color-border: oklch(31% .022 250);--color-ink: oklch(93% .015 235);--color-ink-soft: oklch(75% .018 235);--color-ink-faint: oklch(58% .016 235);--color-accent: oklch(74% .15 225);--color-accent-ink: oklch(15% .01 225)}}:root[data-theme=dark]{--color-paper: oklch(17% .02 250);--color-paper-2: oklch(22% .022 250);--color-paper-3: oklch(27% .024 250);--color-border: oklch(31% .022 250);--color-ink: oklch(93% .015 235);--color-ink-soft: oklch(75% .018 235);--color-ink-faint: oklch(58% .016 235);--color-accent: oklch(74% .15 225);--color-accent-ink: oklch(15% .01 225)}*{box-sizing:border-box}html,body{overflow-x:clip}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--color-paper);color:var(--color-ink);font-family:var(--font-ui);min-height:100vh}button{font-family:inherit;cursor:pointer;color:inherit}a{color:inherit;text-decoration:none}:focus-visible{outline:2px solid var(--color-focus);outline-offset:2px}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.001ms!important;transition-duration:.001ms!important}}.topbar{display:flex;align-items:center;justify-content:space-between;padding:var(--space-md) var(--space-lg);border-bottom:1px solid var(--color-border)}.wordmark{font-family:var(--font-display);font-size:1.5rem;font-weight:600;letter-spacing:-.01em}.wordmark:after{content:"";display:inline-block;width:.5em;height:3px;margin-left:.35em;background:var(--color-accent);border-radius:2px;vertical-align:middle}.user-chip{position:relative;font-size:.85rem}.user-trigger{display:flex;align-items:center;gap:var(--space-xs);background:none;border:none;padding:var(--space-3xs) var(--space-2xs);border-radius:var(--radius-md);color:var(--color-ink-soft);transition:background var(--dur-fast) var(--ease-out)}.user-trigger:hover{background:var(--color-paper-2)}.user-avatar{width:1.75rem;height:1.75rem;border-radius:999px;object-fit:cover}.user-name{max-width:10rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.user-menu{position:absolute;top:calc(100% + var(--space-2xs));right:0;min-width:8rem;padding:var(--space-2xs);border-radius:var(--radius-md);background:var(--color-paper);border:1px solid var(--color-border);box-shadow:0 8px 20px -10px #00000040;z-index:20}.user-menu-item{display:block;padding:var(--space-2xs) var(--space-xs);border-radius:var(--radius-sm);font-size:.85rem;color:var(--color-ink);transition:background var(--dur-fast) var(--ease-out)}.user-menu-item:hover{background:var(--color-paper-2)}.login-shell{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:var(--space-lg)}.login-card{width:100%;max-width:24rem;text-align:center;padding:var(--space-2xl) var(--space-xl);border-radius:var(--radius-lg);background:var(--color-paper-2);border:1px solid var(--color-border)}.login-card .wordmark{justify-content:center;display:inline-flex;align-items:center}.login-copy{margin:var(--space-sm) 0 var(--space-lg);color:var(--color-ink-soft);font-size:.95rem;line-height:1.5}.google-btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2xs);width:100%;padding:var(--space-sm) var(--space-md);border-radius:var(--radius-md);background:var(--color-paper);border:1px solid var(--color-border);font-weight:600;font-size:.95rem;transition:background var(--dur-fast) var(--ease-out),transform var(--dur-fast) var(--ease-out)}.google-btn:hover{background:var(--color-paper-3)}.google-btn:active{transform:translateY(1px)}.library{max-width:72rem;margin:0 auto;padding:var(--space-xl) var(--space-lg) var(--space-2xl)}.stats-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--space-sm);margin-bottom:var(--space-lg)}.stat-tile{padding:var(--space-sm);border-radius:var(--radius-md);background:var(--color-paper-2);border:1px solid var(--color-border);text-align:center}.stat-value{display:block;font-family:var(--font-display);font-size:1.5rem;color:var(--color-ink)}.stat-label{display:block;font-size:.72rem;color:var(--color-ink-faint);margin-top:var(--space-3xs)}.dropzone{border:1.5px dashed var(--color-border);border-radius:var(--radius-lg);padding:var(--space-2xl) var(--space-lg);text-align:center;transition:border-color var(--dur-base) var(--ease-out),background var(--dur-base) var(--ease-out)}.dropzone.is-drag{border-color:var(--color-accent);background:var(--color-paper-2)}.dropzone-title{font-family:var(--font-display);font-size:1.4rem;margin:0 0 var(--space-2xs)}.dropzone-sub{color:var(--color-ink-soft);margin:0}.link-btn{background:none;border:none;padding:0;color:var(--color-accent);font-weight:600;text-decoration:underline;text-underline-offset:2px}.link-btn:hover{opacity:.8}.upload-progress{margin-top:var(--space-md);height:6px;border-radius:999px;background:var(--color-paper-3);overflow:hidden}.upload-progress-fill{height:100%;width:0%;background:var(--color-accent);transition:width var(--dur-base) var(--ease-out)}.upload-error{margin-top:var(--space-sm);padding:var(--space-sm) var(--space-md);border-radius:var(--radius-md);background:color-mix(in oklch,var(--color-danger) 12%,var(--color-paper));color:var(--color-danger);font-size:.9rem}.shelf{margin-top:var(--space-xl);display:grid;grid-template-columns:repeat(auto-fill,minmax(0,11rem));gap:var(--space-lg) var(--space-md);justify-content:start}.empty-note{color:var(--color-ink-faint);font-size:.95rem;margin-top:var(--space-md)}.book-card{position:relative;display:block;border-radius:var(--radius-md);transition:transform var(--dur-base) var(--ease-out)}.book-card:hover,.book-card:focus-visible{transform:translateY(-4px)}.book-spine{height:9.5rem;border-radius:var(--radius-md);background:linear-gradient(155deg,var(--spine-a),var(--spine-b));box-shadow:0 1px 2px #00000014,0 8px 20px -12px #00000059;display:flex;align-items:flex-end;padding:var(--space-sm)}.book-spine-title{font-family:var(--font-display);color:#faf8f5;font-size:.95rem;line-height:1.25;overflow-wrap:anywhere;text-shadow:0 1px 3px rgba(0,0,0,.25)}.book-meta{padding:var(--space-xs) var(--space-3xs) 0}.book-title-sm{margin:0;font-size:.88rem;font-weight:600;overflow-wrap:anywhere}.book-author{margin:.2rem 0 0;font-size:.8rem;color:var(--color-ink-soft)}.book-status{display:flex;align-items:center;gap:var(--space-3xs);margin-top:var(--space-2xs);font-size:.75rem;color:var(--color-ink-faint)}.book-status-error{color:var(--color-danger)}.book-spinner{width:.7rem;height:.7rem;border-radius:999px;border:1.5px solid var(--color-border);border-top-color:var(--color-accent);animation:book-spin .8s linear infinite;flex-shrink:0}@keyframes book-spin{to{transform:rotate(360deg)}}.book-delete{position:absolute;top:var(--space-2xs);right:var(--space-2xs);width:1.75rem;height:1.75rem;border-radius:999px;border:none;background:#00000073;color:#fff;font-size:1rem;line-height:1;opacity:0;transition:opacity var(--dur-fast) var(--ease-out),background var(--dur-fast) var(--ease-out)}.book-card:hover .book-delete,.book-card:focus-within .book-delete,.book-delete.is-confirming{opacity:1}.book-delete.is-confirming{background:var(--color-danger);width:auto;padding:0 var(--space-2xs);border-radius:var(--radius-sm);font-size:.7rem}.reader-shell{display:flex;flex-direction:column;height:100vh;background:var(--color-paper)}.reader-topbar{display:flex;align-items:center;gap:var(--space-2xs);padding:var(--space-2xs) var(--space-sm);border-bottom:1px solid var(--color-border);flex-shrink:0}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:2.25rem;height:2.25rem;border-radius:var(--radius-sm);border:none;background:transparent;font-size:1.05rem;transition:background var(--dur-fast) var(--ease-out)}.icon-btn:hover{background:var(--color-paper-2)}.reader-title{flex:1;min-width:0;font-family:var(--font-display);font-size:.95rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding:0 var(--space-2xs)}.reader-controls{display:flex;align-items:center;gap:var(--space-3xs)}.theme-switch{display:flex;gap:2px;margin-left:var(--space-2xs);border-left:1px solid var(--color-border);padding-left:var(--space-2xs)}.theme-swatch{width:1.6rem;height:1.6rem;border-radius:999px;border:1.5px solid var(--color-border);transition:transform var(--dur-fast) var(--ease-out),border-color var(--dur-fast) var(--ease-out)}.theme-swatch[data-theme=light]{background:#f6fafd}.theme-swatch[data-theme=sepia]{background:#ecdcbe}.theme-swatch[data-theme=dark]{background:#22252b}.theme-swatch.is-active{border-color:var(--color-accent);transform:scale(1.12)}.toc-panel{position:fixed;top:0;left:0;bottom:0;width:min(20rem,84vw);background:var(--color-paper-2);border-right:1px solid var(--color-border);padding:var(--space-lg) var(--space-md);overflow-y:auto;transform:translate(-100%);transition:transform var(--dur-slow) var(--ease-in-out);z-index:30}.toc-panel.is-open{transform:translate(0)}.toc-header{display:flex;align-items:center;justify-content:space-between;margin:0 0 var(--space-md)}.toc-header h2{font-family:var(--font-display);font-size:1.1rem;margin:0}.toc-list a{display:block;padding:var(--space-2xs) var(--space-2xs);border-radius:var(--radius-sm);font-size:.9rem;color:var(--color-ink-soft);transition:background var(--dur-fast) var(--ease-out),color var(--dur-fast) var(--ease-out)}.toc-list a:hover,.toc-list a.is-current{background:var(--color-paper-3);color:var(--color-ink)}.toc-scrim{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000004d;opacity:0;pointer-events:none;transition:opacity var(--dur-base) var(--ease-out);z-index:25}.toc-scrim.is-open{opacity:1;pointer-events:auto}.reader-main{position:relative;flex:1;min-height:0}.viewer{position:absolute;top:0;right:0;bottom:0;left:0}.nav-zone{position:absolute;top:0;bottom:0;width:12%;min-width:2.5rem;border:none;background:transparent;z-index:5}.nav-zone:focus-visible{outline:none}.nav-zone-icon{position:absolute;top:50%;transform:translateY(-50%);width:2.75rem;height:2.75rem;border-radius:999px;display:flex;align-items:center;justify-content:center;background:var(--color-paper);border:1px solid var(--color-border);box-shadow:0 2px 6px #00000014,0 8px 20px -10px #00000040;font-size:1.4rem;line-height:1;color:var(--color-ink-soft);opacity:.7;transition:opacity var(--dur-base) var(--ease-out),transform var(--dur-base) var(--ease-out),color var(--dur-fast) var(--ease-out)}.nav-zone-prev .nav-zone-icon{left:var(--space-sm)}.nav-zone-next .nav-zone-icon{right:var(--space-sm)}.nav-zone:hover .nav-zone-icon{opacity:1;color:var(--color-accent)}.nav-zone-prev:hover .nav-zone-icon{transform:translateY(-50%) translate(-2px)}.nav-zone-next:hover .nav-zone-icon{transform:translateY(-50%) translate(2px)}.nav-zone:focus-visible .nav-zone-icon{opacity:1;outline:2px solid var(--color-focus);outline-offset:2px}@media(max-width:767px){.nav-zone-icon{width:2.25rem;height:2.25rem;font-size:1.2rem;opacity:.55}}.nav-zone-prev{left:0}.nav-zone-next{right:0}.highlight-popup{position:fixed;display:flex;align-items:center;gap:var(--space-2xs);padding:var(--space-2xs);background:var(--color-ink);border-radius:var(--radius-md);box-shadow:0 12px 28px -12px #0006;transform:translate(-50%,-100%) translateY(-10px);opacity:0;transition:opacity var(--dur-fast) var(--ease-out),transform var(--dur-fast) var(--ease-out);z-index:40}.highlight-popup.is-visible{opacity:1;transform:translate(-50%,-100%) translateY(-16px)}.hp-swatch{width:1.5rem;height:1.5rem;border-radius:999px;border:none;transition:transform var(--dur-fast) var(--ease-out)}.hp-swatch:hover{transform:scale(1.15)}.hp-remove{border:none;background:none;color:#fff;opacity:.8;font-size:.9rem;border-left:1px solid rgba(255,255,255,.2);padding-left:var(--space-2xs);margin-left:var(--space-3xs)}.hp-remove:hover{opacity:1}.reader-footer{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-2xs) var(--space-md);border-top:1px solid var(--color-border);font-size:.75rem;color:var(--color-ink-faint);flex-shrink:0}.progress-track{flex:1;height:3px;background:var(--color-paper-3);border-radius:999px;overflow:hidden}.progress-fill{height:100%;width:0%;background:var(--color-accent);transition:width var(--dur-base) var(--ease-out)}.center-note{display:flex;align-items:center;justify-content:center;height:60vh;color:var(--color-ink-soft);font-family:var(--font-display);font-size:1.1rem}@media(max-width:767px){.toc-panel{z-index:30}.reader-title{font-size:.85rem}.shelf{grid-template-columns:repeat(auto-fill,minmax(0,8.5rem))}.book-spine{height:7.5rem}.stats-row{grid-template-columns:repeat(2,minmax(0,1fr))}}