:root{--bg:#f6f5f1;--surface:#fff;--surface-2:#efede7;--ink:#1c1f24;--muted:#5b6270;--line:#e2dfd7;--accent:#2b4a7b;--accent-ink:#fff;--accent-soft:#e3e9f3;--again:#b3261e;--hard:#9a5a06;--good:#2e7d32;--easy:#1f5fae;--new:#1f5fae;--learn:#b3261e;--review:#2e7d32;--ok-bg:#e6f2e7;--bad-bg:#fbe8e6;--serif:"Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;--sans:system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--radius:14px;--tap:48px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#121417;--surface:#1a1d22;--surface-2:#23272e;--ink:#ebe8e1;--muted:#9ba2ad;--line:#2d323a;--accent:#9bb8ea;--accent-ink:#0e1420;--accent-soft:#223149;--again:#f28b82;--hard:#f0b36b;--good:#81c995;--easy:#8ab4f8;--new:#8ab4f8;--learn:#f28b82;--review:#81c995;--ok-bg:#1c3223;--bad-bg:#3a201e;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}:root[data-theme=dark]{--bg:#121417;--surface:#1a1d22;--surface-2:#23272e;--ink:#ebe8e1;--muted:#9ba2ad;--line:#2d323a;--accent:#9bb8ea;--accent-ink:#0e1420;--accent-soft:#223149;--again:#f28b82;--hard:#f0b36b;--good:#81c995;--easy:#8ab4f8;--new:#8ab4f8;--learn:#f28b82;--review:#81c995;--ok-bg:#1c3223;--bad-bg:#3a201e;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--ink);font-family:var(--sans);-webkit-text-size-adjust:100%;margin:0;line-height:1.45}body{min-height:100dvh}a{color:inherit}button,input,textarea,select{font:inherit;color:inherit}h1,h2{font-family:var(--serif);letter-spacing:-.01em;margin:0 0 .5rem;font-weight:600}h1{font-size:1.9rem}h2{margin-top:1.75rem;font-size:1.25rem}:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.boot{min-height:100dvh}.shell{min-height:100dvh;display:flex}.nav{border-right:1px solid var(--line);flex-direction:column;flex:none;gap:4px;width:216px;height:100dvh;padding:20px 12px;display:flex;position:sticky;top:0}.brand{font-family:var(--serif);color:var(--accent);align-items:center;gap:10px;padding:4px 10px 18px;font-size:1.35rem;font-weight:600;text-decoration:none;display:flex}.mark{width:28px;height:28px}.nav-item{min-height:var(--tap);color:var(--muted);border-radius:10px;align-items:center;gap:12px;padding:0 12px;font-weight:500;text-decoration:none;display:flex}.nav-item svg{width:22px;height:22px}.nav-item:hover{background:var(--surface-2)}.nav-item.on{background:var(--accent-soft);color:var(--accent)}.content{flex:1;min-width:0}.page{max-width:860px;margin:0 auto;padding:28px 24px 120px}.page.narrow{max-width:640px}@media (width<=760px){.shell{display:block}.nav{width:auto;height:auto;padding:6px 8px calc(6px + env(safe-area-inset-bottom));border-right:none;border-top:1px solid var(--line);background:color-mix(in srgb, var(--bg) 92%, transparent);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);z-index:10;flex-direction:row;justify-content:space-around;position:fixed;inset:auto 0 0}.brand{display:none}.nav-item{flex-direction:column;justify-content:center;gap:2px;min-width:72px;padding:6px 8px;font-size:.72rem}.page{padding:calc(18px + env(safe-area-inset-top)) 16px 110px}h1{font-size:1.6rem}}.btn{min-height:var(--tap);border:1px solid var(--line);background:var(--surface);cursor:pointer;touch-action:manipulation;border-radius:12px;justify-content:center;align-items:center;gap:8px;padding:0 18px;font-weight:600;text-decoration:none;display:inline-flex}.btn:hover{border-color:var(--muted)}.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}.btn.big{min-height:56px;padding:0 26px;font-size:1.05rem}.btn.wide{width:100%}.btn.small{min-height:38px;padding:0 12px;font-size:.9rem}.btn.ghost{color:var(--muted);background:0 0;border-color:#0000}.btn.danger{color:var(--again)}.btn:disabled{opacity:.5;cursor:default}.icon-btn{width:var(--tap);height:var(--tap);cursor:pointer;color:var(--muted);background:0 0;border:none;border-radius:12px;place-items:center;display:grid}.icon-btn svg{width:24px;height:24px}.row{align-items:center;display:flex}.row.gap{gap:10px;margin-top:20px}.row.between{justify-content:space-between}.wrap{flex-wrap:wrap}input[type=search],input:not([type]),textarea{width:100%;min-height:var(--tap);border:1px solid var(--line);background:var(--surface);border-radius:12px;padding:10px 14px}textarea{resize:vertical}.seg{background:var(--surface-2);border-radius:12px;gap:4px;padding:4px;display:inline-flex}.seg button{min-height:40px;color:var(--muted);cursor:pointer;background:0 0;border:none;border-radius:9px;padding:0 14px;font-weight:600}.seg button.on{background:var(--surface);color:var(--ink);box-shadow:0 1px 2px #0000001f}.check{min-height:var(--tap);color:var(--muted);align-items:center;gap:8px;display:inline-flex}.check input{width:20px;height:20px}.toolbar{flex-wrap:wrap;align-items:center;gap:10px;margin:12px 0 16px;display:flex}.toolbar input[type=search]{flex:220px;width:auto}.page-head{justify-content:space-between;align-items:center;gap:12px;display:flex}.page-head h2{margin:1.75rem 0 .5rem}.back{min-height:40px;color:var(--muted);align-items:center;font-weight:500;text-decoration:none;display:inline-flex}.eyebrow{color:var(--muted);letter-spacing:.06em;text-transform:uppercase;margin:0 0 4px;font-size:.8rem;font-weight:600}.blk-muted{color:var(--muted)}.error{color:var(--again);font-weight:600}.empty{color:var(--muted);padding:20px 4px;list-style:none}.hero{background:var(--surface);border:1px solid var(--line);border-radius:20px;flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:20px;padding:24px;display:flex}.hero-num{margin:0 0 10px;font-size:3.2rem;line-height:1}.hero-num span{color:var(--muted);font-size:1.3rem;font-weight:500}.hero-actions{flex-wrap:wrap;gap:10px;display:flex}@media (width<=520px){.hero-actions,.hero-actions .btn{width:100%}}.counts{flex-wrap:wrap;gap:14px;margin:0;font-size:.95rem;font-weight:600;display:flex}.c-new{color:var(--new)}.c-learn{color:var(--learn)}.c-review{color:var(--review)}.tiles{grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin-top:12px;display:grid}.tile{border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);flex-direction:column;gap:2px;padding:16px 18px;text-decoration:none;display:flex}.tile b{font-family:var(--serif);font-size:1.9rem;line-height:1.1}.tile span,.tile small{color:var(--muted)}.tile.link:hover{border-color:var(--muted)}.meter{background:var(--surface-2);border-radius:6px;height:6px;margin:8px 0 4px;overflow:hidden}.meter i{background:var(--accent);border-radius:6px;height:100%;display:block}.meter.slim{max-width:220px;height:3px;margin:8px 0 0}.deck-list,.note-list{border-radius:var(--radius);border:1px solid var(--line);background:var(--surface);margin:0;padding:0;list-style:none;overflow:hidden}.deck-list li+li,.note-list li+li{border-top:1px solid var(--line)}.deck-row{align-items:center;gap:14px;min-height:64px;padding:10px 16px;text-decoration:none;display:flex}.deck-row:hover{background:var(--surface-2)}.kind{background:var(--muted);border-radius:50%;flex:none;width:10px;height:10px}.kind.music{background:var(--accent)}.deck-name{flex-direction:column;flex:1;font-weight:600;display:flex}.deck-name small{color:var(--muted);font-weight:400}.deck-counts{font-variant-numeric:tabular-nums;gap:12px;font-style:normal;display:flex}.deck-counts em{text-align:right;min-width:1.5ch;font-style:normal;font-weight:700}.title-input{font-family:var(--serif);margin:0 -8px 6px;font-weight:600;background:0 0!important;border:1px solid #0000!important;width:calc(100% + 16px)!important;padding:2px 8px!important;font-size:1.9rem!important}.title-input:hover,.title-input:focus{border-color:var(--line)!important;background:var(--surface)!important}.study-grid{grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px;margin-top:18px;display:grid}.study-grid .big{grid-column:1/-1}.note-row{align-items:center;gap:10px;padding:10px 12px;display:flex}.star{width:40px;height:40px;color:var(--line);cursor:pointer;background:0 0;border:none;flex:none;font-size:1.3rem}.star.on{color:#d69e16}.note-main{flex:1;min-width:0}.note-label{font-weight:600;display:block}.chips{flex-wrap:wrap;gap:4px;margin-top:4px;display:flex}.chip{background:var(--surface-2);color:var(--muted);border-radius:20px;padding:2px 8px;font-size:.75rem}.chip.tag{background:var(--accent-soft);color:var(--accent)}.note-actions{flex:none;gap:4px;display:flex}@media (width<=520px){.note-row{flex-wrap:wrap}.note-actions{margin-left:50px}}.danger-zone{border-top:1px solid var(--line);flex-wrap:wrap;gap:10px;margin-top:32px;padding-top:20px;display:flex}.form{flex-direction:column;gap:16px;margin-top:18px;display:flex}.form label{flex-direction:column;gap:6px;font-weight:600;display:flex}.settings-section{margin-bottom:8px}.setting{border-bottom:1px solid var(--line);flex-direction:column;gap:8px;padding:14px 0;font-weight:600;display:flex}.setting b{color:var(--accent);margin-left:6px}.setting input[type=range]{width:100%;height:32px;accent-color:var(--accent)}.study-shell{max-width:760px;min-height:100dvh;padding:env(safe-area-inset-top) 16px 0;flex-direction:column;margin:0 auto;display:flex}.study-top{align-items:center;gap:12px;padding:8px 0;display:flex}.progress{background:var(--surface-2);border-radius:6px;flex:1;height:6px;overflow:hidden}.progress span{background:var(--accent);height:100%;transition:width .25s;display:block}.study-count{color:var(--muted);font-variant-numeric:tabular-nums;text-align:right;min-width:3.5em;font-size:.9rem}.study-main{flex:1;padding:8px 0 20px}.study-mode{color:var(--muted);text-align:center;margin-bottom:10px;font-size:.85rem}.study-card{background:var(--surface);border:1px solid var(--line);border-radius:20px;flex-direction:column;gap:18px;min-height:42vh;padding:28px 22px;display:flex}.card-face{text-align:center;flex-direction:column;align-items:center;gap:10px;display:flex}.card-face p{overflow-wrap:anywhere;margin:0}.blk-title{font-family:var(--serif);font-size:1.7rem;line-height:1.3}.blk-label{color:var(--muted);letter-spacing:.08em;text-transform:uppercase;font-size:.8rem;font-weight:700}.blk-notes{font-family:var(--serif);letter-spacing:.02em;font-size:2.1rem}.card-face .blk-muted{font-size:.95rem}.cloze mark{color:inherit;background:0 0}.cloze mark.blank{color:var(--accent);font-weight:600}.cloze mark.revealed{color:var(--accent);background:var(--accent-soft);border-radius:6px;padding:0 6px}.staff{width:100%;color:var(--ink);justify-content:center;display:flex}.staff svg{width:100%;height:auto}.staff svg [fill]:not([fill=none]){fill:currentColor}.staff svg [stroke]:not([stroke=none]){stroke:currentColor}.audio-btn{border:1px solid var(--line);background:var(--accent-soft);min-height:56px;color:var(--accent);cursor:pointer;border-radius:40px;align-items:center;gap:10px;padding:0 22px;font-weight:700;display:inline-flex}.audio-btn svg{width:22px;height:22px}.typed{gap:10px;display:flex}.typed input{text-align:center;font-size:1.25rem}.choices{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;display:grid}.choice{border:1px solid var(--line);background:var(--surface);cursor:pointer;touch-action:manipulation;border-radius:14px;min-height:56px;padding:10px 16px;font-size:1.02rem;font-weight:600}.choice:hover:not(:disabled){border-color:var(--accent)}.choice.right{background:var(--ok-bg);border-color:var(--good);color:var(--ink)}.choice.wrong{background:var(--bad-bg);border-color:var(--again)}.choice.dim{opacity:.55}.answer{border-top:1px dashed var(--line);flex-direction:column;gap:14px;padding-top:18px;display:flex}.verdict{text-align:center;border-radius:12px;flex-direction:column;gap:2px;padding:12px 16px;display:flex}.verdict.ok{background:var(--ok-bg);color:var(--good)}.verdict.bad{background:var(--bad-bg);color:var(--again)}.verdict span{color:var(--ink)}.study-actions{padding:12px 0 calc(12px + env(safe-area-inset-bottom));background:linear-gradient(to top, var(--bg) 75%, transparent);position:sticky;bottom:0}.ratings{grid-template-columns:repeat(4,1fr);gap:8px;display:grid}.rate{border:1px solid var(--line);background:var(--surface);cursor:pointer;touch-action:manipulation;border-radius:14px;flex-direction:column;justify-content:center;align-items:center;gap:2px;min-height:64px;font-weight:700;display:flex}.rate small{color:var(--muted);font-weight:500}.rate.again span{color:var(--again)}.rate.hard span{color:var(--hard)}.rate.good span{color:var(--good)}.rate.easy span{color:var(--easy)}.rate.suggested{border-width:2px;border-color:currentColor}.rate.again.suggested{border-color:var(--again)}.rate.hard.suggested{border-color:var(--hard)}.rate.good.suggested{border-color:var(--good)}.results h1{margin-top:12px}.stat-row{grid-template-columns:repeat(3,1fr);gap:10px;margin:18px 0;display:grid}.stat{border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);flex-direction:column;padding:16px;display:flex}.stat b{font-family:var(--serif);font-size:2rem}.stat span{color:var(--muted)}.rating-bars{flex-direction:column;gap:8px;display:flex}.rbar{grid-template-columns:60px 1fr 32px;align-items:center;gap:10px;font-weight:600;display:grid}.rbar div{background:var(--surface-2);border-radius:10px;height:10px;overflow:hidden}.rbar i{height:100%;display:block}.rbar.again i{background:var(--again)}.rbar.hard i{background:var(--hard)}.rbar.good i{background:var(--good)}.rbar.easy i{background:var(--easy)}.rbar b{text-align:right}.fb-fab{border:1px solid var(--line);background:var(--surface);width:54px;height:54px;color:var(--accent);cursor:pointer;z-index:20;border-radius:50%;place-items:center;display:grid;position:fixed;bottom:24px;right:24px;box-shadow:0 4px 16px #00000024}.fb-fab svg,.fb-inline svg{width:24px;height:24px}.fb-inline{color:var(--accent);position:relative}.fb-badge{background:var(--again);color:#fff;border-radius:10px;place-items:center;min-width:20px;height:20px;padding:0 5px;font-size:.72rem;font-weight:700;display:grid;position:absolute;top:2px;right:2px}@media (width<=760px){.fb-fab{right:14px;bottom:calc(84px + env(safe-area-inset-bottom))}}.fb-overlay{z-index:50;background:#0006;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.fb-sheet{background:var(--bg);border-radius:20px;flex-direction:column;gap:12px;width:min(520px,100%);max-height:calc(100dvh - 32px);padding:18px 20px 20px;display:flex;overflow:auto}.fb-sheet h2{margin:0}.fb-lead{margin:0;font-size:.92rem}@media (width<=760px){.fb-overlay{align-items:flex-end;padding:0}.fb-sheet{width:100%;padding-bottom:calc(20px + env(safe-area-inset-bottom));border-radius:20px 20px 0 0}}.fb-list{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);margin:4px 0 0;padding:0;list-style:none}.fb-list li{align-items:center;gap:8px;padding:8px 8px 8px 14px;display:flex}.fb-list li+li{border-top:1px solid var(--line)}.fb-list span{overflow-wrap:anywhere;flex-direction:column;flex:1;display:flex}.fb-list small{color:var(--muted)}.fb-sent{color:var(--good);margin:0;font-weight:600}.fb-prompt{border-radius:var(--radius);background:var(--accent-soft);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-top:20px;padding:14px 16px;font-weight:600;display:flex}.gap-sm{gap:8px}@media (orientation:landscape) and (height<=520px){.study-card{min-height:auto;padding:16px}.staff svg{max-height:42vh}}