:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;--ink:#152028;--ink-soft:#52606c;--paper:#e4eaf0;--paper-deep:#cfd9e3;--glass:255, 255, 255;--line-rgb:21, 32, 40;--shadow-rgb:21, 32, 40;--chrome:238, 242, 246;--copper-rgb:179, 58, 92;--sage-rgb:26, 107, 110;--atmos-top:#eef3f7;--reader-bg:#eef2f6;--on-ink:#f2f5f8;--on-accent:#fff5f8;--surface:rgba(var(--glass), .76);--surface-solid:#f2f5f8;--line:rgba(var(--line-rgb), .1);--copper:#b33a5c;--copper-deep:#8f2d48;--sage:#1a6b6e;--danger:#a61f2b;--copper-text:#b33a5c;--copper-text-deep:#8f2d48;--sage-text:#1a6b6e;--shadow:0 18px 50px rgba(var(--shadow-rgb), .09);--font-ui:"Outfit", sans-serif;--font-read:"Newsreader", Georgia, serif;--radius:16px;color:var(--ink);background:var(--paper);font-family:var(--font-ui);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}*{box-sizing:border-box}html,body,#root{min-height:100%}body{background:var(--paper);min-height:100dvh;padding:env(safe-area-inset-top,0) env(safe-area-inset-right,0) env(safe-area-inset-bottom,0) env(safe-area-inset-left,0);margin:0}button,input{font:inherit}button{cursor:pointer;color:inherit;background:0 0;border:0}h1,h2,p{margin:0}.app-shell{flex-direction:column;height:100dvh;min-height:100dvh;display:flex;position:relative;overflow:clip}.app-shell.loading{font-family:var(--font-read);color:var(--ink-soft);place-items:center;display:grid}.atmosphere{pointer-events:none;background:radial-gradient(ellipse 80% 55% at 8% -12%, rgba(var(--copper-rgb), .14), transparent 55%), radial-gradient(ellipse 70% 50% at 96% 0%, rgba(var(--sage-rgb), .14), transparent 50%), linear-gradient(180deg, var(--atmos-top) 0%, var(--paper) 42%, var(--paper-deep) 100%);z-index:0;position:fixed;inset:0}.topnav,.main{z-index:1;position:relative}.topnav{padding:1.1rem 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button:hover{background:var(--ink);color:var(--on-ink)}.main{z-index:1;flex:1;min-height:0;padding:0 clamp(1rem,4vw,2.5rem) 2.5rem;position:relative;overflow:auto}.main:has(.library){padding-bottom:max(1rem, env(safe-area-inset-bottom,0px));flex-direction:column;display:flex;overflow:hidden}.library{flex-direction:column;flex:1;min-height:0;display:flex}.library .panel-header,.library .banner,.library .continue-card,.library .empty-actions{flex-shrink:0}.library .book-list{overscroll-behavior:contain;-webkit-overflow-scrolling:touch;scrollbar-gutter:stable;background:0 0;border:0;flex:auto;min-height:0;margin:0;padding-bottom:.5rem;overflow-y:auto}.panel{animation:.5s both rise}.panel-header{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:1.25rem;margin-bottom:1.5rem;display:flex}.eyebrow{letter-spacing:.12em;text-transform:uppercase;color:var(--copper-text);margin-bottom:.45rem;font-size:.78rem;font-weight:600}.panel-header h1{font-family:var(--font-read);letter-spacing:-.03em;font-size:clamp(2rem,5vw,3rem);line-height:1.1}.lede{max-width:34rem;color:var(--ink-soft);margin-top:.55rem;line-height:1.5}.profile-card{border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);max-width:36rem;box-shadow:var(--shadow);padding:1.25rem 1.35rem 1.4rem}.profile-card.usage-card{margin-top:1rem}.usage-list{gap:.45rem;margin:.35rem 0 .85rem;padding:0;list-style:none;display:grid}.usage-list li{color:var(--ink-soft);justify-content:space-between;align-items:baseline;gap:1rem;font-size:.95rem;display:flex}.usage-list strong{color:var(--ink);font-variant-numeric:tabular-nums}.usage-budget-bar{background:rgba(var(--line-rgb), .08);border-radius:999px;height:.45rem;margin-bottom:.55rem;overflow:hidden}.usage-budget-fill{border-radius:inherit;background:linear-gradient(90deg, var(--sage), #2a8f92);height:100%;transition:width 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.field-label{margin-bottom:.55rem}.chip-row{-webkit-overflow-scrolling:touch;flex-wrap:nowrap;gap:.45rem;padding-bottom:.15rem;display:flex;overflow-x:auto}.chip-row.wrap{flex-wrap:wrap;overflow:visible}.chip{border:1px solid var(--line);background:rgba(var(--glass), .72);min-height:2.35rem;color:var(--ink);border-radius:999px;flex:none;padding:.45rem .9rem;font-size:.92rem;font-weight:600;transition:background .14s,border-color .14s,color .14s}.chip:hover{border-color:rgba(var(--copper-rgb), .35)}.chip.active{background:var(--copper);border-color:var(--copper);color:var(--on-accent)}.generate-prompt{resize:vertical;width:100%;min-height:5rem;font-family:inherit;line-height:1.45}.vocab-toggle{color:var(--ink-soft);cursor:pointer;align-items:flex-start;gap:.65rem;font-size:.95rem;line-height:1.4;display:flex}.vocab-toggle.disabled{opacity:.55;cursor:not-allowed}.vocab-toggle 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