:root{--bg:#f6efe0;--bg-deep:#ebe2cd;--paper:#fbf6ea;--paper-edge:#efe6cf;--ink:#1d1813;--ink-soft:#4a4036;--ink-muted:#8a7e6c;--hairline:#d8cdb1;--saffron-50:#fbf2dd;--saffron-100:#f5e2b3;--saffron-300:#e6c272;--saffron-500:#c9842c;--saffron-600:#ac6b1f;--saffron-700:#84511a;--indigo-500:#2f3e63;--indigo-600:#25324f;--rust-500:#a8451f;--rust-600:#8a3818;--leaf-500:#5b6e4f;--leaf-600:#485840;--hm-new:#ece2c8;--hm-learning:#e6c272;--hm-review:#c9842c;--hm-mastered:#5b6e4f;--hm-stale:#a8451f;--r-xs:4px;--r-sm:6px;--r-md:10px;--r-lg:14px;--r-xl:20px;--r-2xl:28px;--r-pill:999px;--sh-1:0 1px 0 #1d18130a, 0 1px 2px #1d18130d;--sh-2:0 2px 4px #1d18130f, 0 4px 12px #1d18130f;--sh-3:0 6px 18px #1d18131a, 0 1px 3px #1d18130f;--font-display:"Fraunces", "Source Serif Pro", Georgia, serif;--font-body:"Inter Tight", "Inter", -apple-system, system-ui, sans-serif;--font-mono:"JetBrains Mono", "IBM Plex Mono", ui-monospace, monospace;--s-1:4px;--s-2:8px;--s-3:12px;--s-4:16px;--s-5:20px;--s-6:24px;--s-7:32px;--s-8:40px;--s-9:48px;--s-10:64px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{background:var(--bg);color:var(--ink);font-family:var(--font-body);font-feature-settings:"ss01", "cv11";-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.t-display{font-family:var(--font-display);letter-spacing:-.012em;font-weight:500}.t-display-italic{font-family:var(--font-display);letter-spacing:-.01em;font-style:italic;font-weight:400}.t-body{font-family:var(--font-body);font-weight:400}.t-mono{font-family:var(--font-mono);font-feature-settings:"tnum";font-weight:500}.eyebrow{font-family:var(--font-body);letter-spacing:.14em;text-transform:uppercase;color:var(--ink-muted);font-size:11px;font-weight:600}.card{background:var(--paper);border:1px solid var(--paper-edge);border-radius:var(--r-lg);box-shadow:var(--sh-1)}.btn{cursor:pointer;font-family:var(--font-body);-webkit-user-select:none;user-select:none;letter-spacing:-.005em;white-space:nowrap;border:none;justify-content:center;align-items:center;gap:8px;font-weight:600;text-decoration:none;transition:transform 80ms,box-shadow .12s,background .12s;display:inline-flex}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{background:var(--ink);color:var(--bg);box-shadow:var(--sh-1)}.btn-saffron{background:var(--saffron-500);color:#fff;box-shadow:var(--sh-2)}.btn-ghost{color:var(--ink);border:1px solid var(--hairline);background:0 0}.btn-dark{color:#fff;background:#ffffff14;border:1px solid #ffffff1f}.btn-lg{border-radius:var(--r-pill);height:56px;padding:0 22px;font-size:16px}.btn-md{border-radius:var(--r-pill);height:44px;padding:0 18px;font-size:15px}.btn-sm{border-radius:var(--r-pill);height:32px;padding:0 14px;font-size:13px}.chip{background:var(--paper);border:1px solid var(--hairline);border-radius:var(--r-pill);height:26px;color:var(--ink-soft);align-items:center;gap:6px;padding:4px 10px;font-size:12px;font-weight:500;display:inline-flex}.chip-mono{font-family:var(--font-mono);letter-spacing:.02em;font-size:11px}.hm-cell{aspect-ratio:1;border-radius:3px}.hm-cell.lvl-new{background:var(--hm-new)}.hm-cell.lvl-learning{background:var(--hm-learning)}.hm-cell.lvl-review{background:var(--hm-review)}.hm-cell.lvl-mastered{background:var(--hm-mastered)}.hm-cell.lvl-stale{background:var(--hm-stale)}@keyframes bqt-pulse{0%,to{opacity:1}50%{opacity:.55}}.bqt-pulse{animation:1.2s ease-in-out infinite bqt-pulse}.paper-grain{pointer-events:none;opacity:.4;mix-blend-mode:multiply;z-index:0;background-image:radial-gradient(#9b825a0f 1px,#0000 1px),radial-gradient(#9b825a0a 1px,#0000 1px);background-position:0 0,1px 2px;background-size:3px 3px,7px 7px;position:absolute;inset:0}.bqt-screen{background:var(--bg);width:100%;min-height:100dvh;color:var(--ink);flex-direction:column;display:flex;position:relative}.screen-scroll{-webkit-overflow-scrolling:touch;flex:1;overflow-y:auto}.bottom-bar{z-index:10;-webkit-backdrop-filter:blur(20px);border-top:1px solid var(--hairline);padding-bottom:env(safe-area-inset-bottom);background:#f6efe0f5;flex-shrink:0;position:sticky;bottom:0}.bottom-bar-dark{background:#1d1813eb;border-top:1px solid #ffffff14}.drill-wrapper{flex-direction:column;min-height:100dvh;display:flex}.drill-sidebar{display:none}.drill-main{flex-direction:column;flex:1;min-height:0;display:flex;overflow:hidden}.home-layout{flex-direction:column;flex:1;min-height:0;display:flex}.home-main{-webkit-overflow-scrolling:touch;flex:1;overflow-y:auto}.home-rail{display:none}.home-mobile-only{display:block}.home-wide-only{display:none}.hm-row{grid-template-columns:54px 1fr 38px;align-items:center;gap:10px;display:grid}.hm-grid{grid-template-columns:repeat(30,1fr);gap:2px;display:grid}@media (min-width:768px){.bqt-screen{max-width:600px;margin:0 auto}.bqt-screen--wide{max-width:none;margin:0}.home-layout{flex-direction:row;overflow:hidden}.home-rail{background:var(--bg-deep);border-right:1px solid var(--hairline);flex-direction:column;flex-shrink:0;width:min(280px,25vw);display:flex;overflow:hidden}.home-rail__scroll{flex:1;overflow-y:auto}.home-mobile-header,.home-mobile-only{display:none}.home-wide-only{display:block}.home-bottom-nav{display:none}.home-card-grid{grid-template-columns:1fr 1fr;align-items:stretch;gap:14px;display:grid}.hm-row{grid-template-columns:70px 1fr 38px}.hm-grid{grid-template-columns:repeat(60,1fr)}.drill-wrapper{flex-direction:row}.drill-sidebar{background:var(--ink);color:#fff;border-right:1px solid #ffffff14;flex-direction:column;flex-shrink:0;width:min(280px,25vw);display:flex;overflow:hidden}.drill-main>.bqt-screen{max-width:none;margin:0}.drill-header{display:none}}