:root{--bg:#fbfaff;--bg-glow-1:#ece7ff;--bg-glow-2:#e0f7f0;--surface:#fff;--surface-2:#f6f5ff;--line:#e9e6f9;--line-strong:#cfc8e4;--ink:#241f3a;--ink-soft:#6a6590;--brand:#6d5bf5;--brand-ink:#fff;--good:#1cb87f;--bad:#ef5f7d;--accent:#ffb833;--accent-ink:#9a5c00;--hl-sentence:#ddd6ff;--hl-blank:#ffd98a;--radius:20px;--radius-sm:14px;--shadow:0 1px 2px #1e18460f, 0 8px 24px #1e184612;--shadow-lg:0 2px 6px #1e184614, 0 24px 60px #1e184629;--ring:0 0 0 4px color-mix(in srgb, var(--brand) 22%, transparent)}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#1b1830;--bg-glow-1:#2e2560;--bg-glow-2:#194034;--surface:#272341;--surface-2:#322d52;--line:#423b68;--line-strong:#5b5290;--ink:#f4f2ff;--ink-soft:#b3aed2;--accent-ink:#ffc35c;--hl-sentence:#453a80;--hl-blank:#7a5a12;--shadow:0 1px 2px #0000004d, 0 8px 24px #00000059;--shadow-lg:0 2px 6px #0006, 0 24px 60px #00000080}}:root[data-theme=dark]{--bg:#1b1830;--bg-glow-1:#2e2560;--bg-glow-2:#194034;--surface:#272341;--surface-2:#322d52;--line:#423b68;--line-strong:#5b5290;--ink:#f4f2ff;--ink-soft:#b3aed2;--accent-ink:#ffc35c;--hl-sentence:#453a80;--hl-blank:#7a5a12;--shadow:0 1px 2px #0000004d, 0 8px 24px #00000059;--shadow-lg:0 2px 6px #0006, 0 24px 60px #00000080}*{box-sizing:border-box}body{color:var(--ink);background:var(--bg);background-image:radial-gradient(60rem 40rem at 12% -10%, var(--bg-glow-1), transparent 60%), radial-gradient(50rem 36rem at 105% 8%, var(--bg-glow-2), transparent 60%);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;background-attachment:fixed;margin:0;font:16px/1.6 -apple-system,BlinkMacSystemFont,Segoe UI Variable Display,Segoe UI,system-ui,sans-serif}h1,h2,h3{margin:0 0 .4em;line-height:1.2}h1{letter-spacing:-.03em;font-size:clamp(2rem,1.4rem + 2vw,3.25rem);font-weight:700}h2{letter-spacing:-.015em}p{margin:0 0 .8em}code{background:var(--surface-2);border:1px solid var(--line);border-radius:5px;padding:0 4px;font-size:.88em}.app{max-width:min(1640px,94vw);margin:0 auto;padding:40px 32px 80px}.drop-zone{position:relative}.drop-zone.active{box-shadow:inset 0 0 0 2px var(--brand);border-radius:var(--radius)}.drop-overlay{z-index:5;text-align:center;background:color-mix(in srgb, var(--brand) 10%, var(--surface) 90%);border-radius:var(--radius);pointer-events:none;place-items:center;gap:2px;display:grid;position:absolute;inset:0}.drop-overlay p{color:var(--brand);margin:0;font-size:1.1rem;font-weight:700}.drop-overlay span{color:var(--ink-soft);font-size:.85rem}.drop-hint{font-size:.85rem}.drop-cta{text-align:center;border:2px dashed var(--line);border-radius:var(--radius-sm);background:var(--surface-2);cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:6px;width:100%;min-height:200px;padding:24px;transition:border-color .15s,background .15s;display:flex;position:relative}.drop-cta:hover{border-color:var(--brand);background:color-mix(in srgb, var(--brand) 6%, var(--surface-2))}.drop-cta input{opacity:0;cursor:pointer;position:absolute;inset:0}.drop-cta strong{font-size:1.15rem}.drop-cta span{color:var(--ink-soft);font-size:.92rem}@media (max-width:720px){.app{padding:24px 18px 60px}}.loading{text-align:center;color:var(--ink-soft);padding:80px}.muted{color:var(--ink-soft)}.error{background:color-mix(in srgb, var(--bad) 12%, var(--surface));border:1px solid color-mix(in srgb, var(--bad) 40%, var(--line));color:var(--bad);border-radius:10px;padding:8px 12px}.error.banner{border-radius:var(--radius-sm);box-shadow:var(--shadow-lg);margin:24px 0 0;padding:14px 18px;position:sticky;bottom:16px}.row{align-items:center;gap:10px;display:flex}.row.wrap{flex-wrap:wrap}button{font:inherit;color:inherit;cursor:pointer;background:0 0;border:1px solid #0000}button:disabled{opacity:.4;cursor:not-allowed}button:focus-visible{box-shadow:var(--ring);outline:none}.btn{border-radius:var(--radius-sm);letter-spacing:-.005em;white-space:nowrap;justify-content:center;align-items:center;gap:8px;min-height:44px;padding:0 20px;font-size:.975rem;font-weight:600;transition:transform .12s,background .16s,box-shadow .16s,border-color .16s;display:inline-flex}.btn:not(:disabled):active{transform:scale(.975)}.btn-lg{border-radius:16px;min-height:52px;padding:0 28px;font-size:1.05rem}.btn-primary{background:var(--brand);color:var(--brand-ink);box-shadow:0 1px 2px #3c2da03d,0 8px 20px #6c5ce747}.btn-primary:not(:disabled):hover{background:color-mix(in srgb, var(--brand) 88%, black);box-shadow:0 2px 4px #3c2da042,0 12px 28px #6c5ce757}.btn-quiet{background:var(--surface);border-color:var(--line-strong);color:var(--ink);box-shadow:var(--shadow)}.btn-quiet:not(:disabled):hover{background:var(--surface-2);border-color:var(--brand);color:var(--brand)}.btn-quiet:not(:disabled):active{background:color-mix(in srgb, var(--brand) 8%, var(--surface))}.btn-back{gap:10px;padding-left:16px}.btn-back:before{content:"←";font-size:1.05em;line-height:1;transition:transform .16s}.btn-back:not(:disabled):hover:before{transform:translate(-3px)}.btn-icon{min-height:38px;color:var(--ink-soft);border-radius:10px;padding:0 14px;font-size:.9rem;font-weight:500}.btn-icon:not(:disabled):hover{background:var(--surface-2);color:var(--ink)}.btn-danger:not(:disabled):hover{background:color-mix(in srgb, var(--bad) 14%, transparent);color:var(--bad)}.primary{background:var(--brand);color:var(--brand-ink);border-radius:var(--radius-sm);min-height:44px;padding:0 20px;font-weight:600;box-shadow:0 1px 2px #3c2da03d,0 8px 20px #6c5ce747}.primary:not(:disabled):hover{background:color-mix(in srgb, var(--brand) 88%, black)}.ghost{background:var(--surface);border-color:var(--line);color:var(--ink);border-radius:var(--radius-sm);min-height:44px;padding:0 18px;font-weight:500}.ghost:not(:disabled):hover{background:var(--surface-2)}.small{min-height:38px;padding:0 14px;font-size:.9rem}.wide{min-width:240px}.danger{color:var(--bad)}.icon{color:var(--ink-soft);background:0 0;border-radius:10px;min-height:34px;padding:6px 10px;font-size:1.05rem}.icon:hover{background:var(--surface-2);color:var(--ink)}.spacer{flex:1}.dot-sep:before{content:"·";margin:0 8px}kbd{opacity:.55;border:1px solid;border-radius:6px;padding:1px 6px;font-family:inherit;font-size:.72em}.file-button{border-radius:var(--radius-sm);cursor:pointer;border:1px solid var(--line);justify-content:center;align-items:center;min-height:44px;padding:0 20px;font-weight:600;display:inline-flex;position:relative;overflow:hidden}.file-button.primary{border-color:#0000}.file-button input{opacity:0;cursor:pointer;position:absolute;inset:0}.field{flex-direction:column;flex:1;gap:6px;display:flex}.field>span{color:var(--ink-soft);font-size:.85rem;font-weight:600}textarea,input[type=text],input[type=search],input:not([type]),select{font:inherit;color:var(--ink);background:var(--surface);border:1px solid var(--line);resize:vertical;appearance:none;border-radius:12px;width:100%;padding:13px 15px;transition:border-color .16s,box-shadow .16s}input[type=search]::-webkit-search-decoration{appearance:none}input[type=search]::-webkit-search-cancel-button{appearance:none}textarea:focus,input:focus,select:focus{border-color:var(--brand);box-shadow:var(--ring);outline:none}.field>span{letter-spacing:.01em;color:var(--ink-soft);font-size:.9rem;font-weight:600}.field-pair{grid-template-columns:1fr 1fr;gap:22px;margin-bottom:20px;display:grid}.inline-field{color:var(--ink-soft);align-items:center;gap:6px;font-size:.88rem;display:inline-flex}.inline-field select{width:auto;padding:5px 8px}.site-header{align-items:center;gap:12px;padding-bottom:4px;display:flex}.flashy-mark{filter:drop-shadow(0 4px 10px color-mix(in srgb, var(--brand) 30%, transparent));flex:none;display:block}.wordmark{letter-spacing:-.03em;color:var(--ink);font-size:1.75rem;font-weight:800}.modal.signup{text-align:left;width:min(480px,100%)}.signup-head{align-items:flex-start;gap:14px;margin-bottom:20px;display:flex}.signup-head h2{margin:0 0 4px;font-size:1.25rem}.signup-head p{margin:0;font-size:.95rem}.modal.signup .field{margin-bottom:16px}.field-error{color:var(--bad);font-size:.85rem;font-weight:600}.signup-rating{gap:8px;display:flex}.signup-star{border:2px solid var(--line-strong);background:var(--surface);border-radius:12px;flex-direction:column;flex:1;align-items:center;gap:3px;padding:10px 4px 8px;transition:border-color .15s,background .15s,transform .12s;display:flex}.signup-star:hover{border-color:var(--dot);transform:translateY(-2px)}.signup-star.on{border-color:var(--dot);background:color-mix(in srgb, var(--dot) 18%, var(--surface))}.signup-star-num{background:var(--dot);color:#1a1626;border-radius:8px;place-items:center;width:26px;height:26px;font-size:.9rem;font-weight:700;display:grid}.signup-star-label{color:var(--ink-soft);font-size:.72rem;font-weight:600}.signup-note{margin:4px 0 18px;font-size:.85rem}.modal.feedback{text-align:left;width:min(520px,100%)}.feedback-head{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.feedback-head h2{margin:0;font-size:1.3rem}.feedback-lede{color:var(--ink-soft);margin:6px 0 16px}.feedback-check{color:var(--ink-soft);cursor:pointer;align-items:flex-start;gap:10px;margin-top:14px;font-size:.9rem;display:flex}.feedback-check input{width:auto;accent-color:var(--brand);flex:none;margin-top:3px}.link-button{min-height:0;font:inherit;color:var(--brand);background:0 0;border:none;padding:0;text-decoration:underline}.feedback-details{background:var(--surface-2);border:1px solid var(--line);color:var(--ink-soft);white-space:pre-wrap;word-break:break-word;border-radius:10px;margin:10px 0 0;padding:12px 14px;font-size:.82rem;overflow-x:auto}.feedback-note{margin:14px 0 0;font-size:.85rem}.feedback-sent{text-align:center}.feedback-address{color:var(--ink);word-break:break-all;margin:6px 0 0;font-weight:700}.modal.feedback .confirm-actions{justify-content:flex-end}.hero{grid-template-columns:minmax(0,1fr) 300px;align-items:center;gap:40px;padding:8px 0 48px;display:grid}.hero-copy h1{max-width:16ch;margin-bottom:16px}.tagline{max-width:52ch;color:var(--ink-soft);margin-bottom:28px;font-size:1.15rem;line-height:1.55}.hero-actions{flex-wrap:wrap;gap:12px;display:flex}.empty{text-align:center;color:var(--ink-soft);border:2px dashed var(--line);border-radius:var(--radius);padding:72px 24px;font-size:1.05rem}.deck-grid{grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:24px;margin:0;padding:0;list-style:none;display:grid}.deck-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);flex-direction:column;transition:transform .18s,box-shadow .18s;display:flex;overflow:hidden}.deck-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px)}.deck-open{text-align:left;color:inherit;border-radius:0;padding:26px 26px 18px}.deck-open h2{margin-bottom:6px;font-size:1.4rem}.deck-meta{color:var(--ink-soft);margin-bottom:16px;font-size:.95rem}.deck-actions{margin-top:auto;padding:0 26px}.btn-block{width:100%;display:flex}.deck-more{flex-wrap:wrap;gap:4px;padding:12px 20px 16px;display:flex}.mastery{background:var(--surface-2);border:1px solid var(--line);border-radius:99px;height:8px;overflow:hidden}.mastery-fill{background:linear-gradient(90deg, var(--brand), var(--good));height:100%;transition:width .4s}.buddy-hello{flex-direction:column;align-items:center;display:flex;position:relative}.bubble{background:var(--surface);border:1px solid var(--line);max-width:260px;box-shadow:var(--shadow);text-align:center;border-radius:16px;margin:0 0 8px;padding:12px 16px;font-size:.95rem;animation:.28s cubic-bezier(.2,.9,.3,1) bubble-in;position:relative}.bubble:after{content:"";background:var(--surface);border-right:1px solid var(--line);border-bottom:1px solid var(--line);width:12px;height:12px;position:absolute;bottom:-7px;left:50%;transform:translate(-50%)rotate(45deg)}@keyframes bubble-in{0%{opacity:0;transform:translateY(6px)scale(.96)}}.mascot-poke{cursor:pointer;background:0 0;border:none;border-radius:50%;padding:0}.mascot-poke:focus-visible{box-shadow:var(--ring)}.guide-title{margin:0;font-size:clamp(1.6rem,1.2rem + 1.4vw,2.4rem)}.guide-lede{color:var(--ink-soft);max-width:62ch;margin-bottom:32px;font-size:1.1rem}.guide-grid{grid-template-columns:repeat(auto-fit,minmax(360px,1fr));gap:22px;margin-bottom:32px;display:grid}.guide-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px 28px}.guide-card h2{margin-bottom:12px;font-size:1.2rem}.guide-card dt{margin-top:16px;font-weight:700}.guide-card dd{color:var(--ink-soft);margin:4px 0 0}.guide-card dl{margin:0}.guide-list{color:var(--ink-soft);margin:0 0 14px;padding-left:20px}.guide-list li{margin-bottom:4px}.rating-guide{flex-direction:column;gap:8px;margin:16px 0;padding:0;list-style:none;display:flex}.rating-guide li{background:color-mix(in srgb, var(--dot) 12%, var(--surface));border:1px solid color-mix(in srgb, var(--dot) 34%, transparent);border-radius:12px;align-items:center;gap:12px;padding:8px 12px;display:flex}.rating-key{background:var(--dot);color:#1a1626;border-radius:9px;flex:none;place-items:center;width:30px;height:30px;font-weight:700;display:grid}.rating-what{flex-wrap:wrap;align-items:baseline;gap:8px;display:flex}.rating-what em{color:var(--ink-soft);font-size:.9rem;font-style:normal}.foot-row{flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;margin-bottom:16px;display:flex}.theme-toggle button{min-height:34px;padding:0 14px;font-size:.88rem}.scoreboard{background:var(--line);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:2px;margin-bottom:32px;display:grid;overflow:hidden}.score{background:var(--surface);flex-direction:column;gap:4px;padding:20px 22px;display:flex}.score-value{letter-spacing:-.02em;font-variant-numeric:tabular-nums;align-items:center;gap:8px;font-size:1.9rem;font-weight:700;line-height:1.1;display:flex}.score-label{color:var(--ink-soft);font-size:.85rem}.score.streak.hot .score-value{color:var(--accent-ink)}.flame{font-size:1.4rem}.wide-score{justify-content:center}.days{gap:4px;margin-bottom:8px;display:flex}.day{background:var(--surface-2);border:1px solid var(--line);border-radius:4px;width:12px;height:22px}.day.on{background:var(--good);border-color:var(--good)}.stat-grid{grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:14px;margin:24px 0;display:grid}.stat{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px 12px}.stat.hot{border-color:color-mix(in srgb, var(--accent) 55%, var(--line));background:color-mix(in srgb, var(--accent) 10%, var(--surface-2))}.stat-value{letter-spacing:-.02em;font-variant-numeric:tabular-nums;font-size:1.65rem;font-weight:700;display:block}.stat-label{color:var(--ink-soft);margin-top:2px;font-size:.82rem;display:block}.scope-tag.quiet{color:var(--ink-soft);background:var(--surface-2);border:1px solid var(--line)}.combo{color:var(--accent-ink);background:color-mix(in srgb, var(--accent) 15%, transparent);font-variant-numeric:tabular-nums;border-radius:99px;padding:5px 12px;font-size:.95rem;font-weight:700}.study-clock{color:var(--ink-soft);font-variant-numeric:tabular-nums;text-align:right;min-width:46px;font-size:.95rem}.editor-top,.study-top{flex-wrap:wrap;align-items:center;gap:14px;margin-bottom:28px;display:flex}.deck-title{letter-spacing:-.02em;background:0 0;border-color:#0000;flex:1;min-width:220px;padding:10px 14px;font-size:1.6rem;font-weight:700}.deck-title:hover{border-color:var(--line);background:var(--surface)}.tabs{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin-bottom:24px;display:grid}.tab{text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);color:inherit;box-shadow:var(--shadow);flex-direction:column;gap:4px;padding:18px 20px;transition:border-color .16s,box-shadow .16s,transform .16s;display:flex}.tab:hover{transform:translateY(-2px)}.tab strong{font-size:1.05rem}.tab span{color:var(--ink-soft);font-size:.92rem}.tab.on{border-color:var(--brand);box-shadow:var(--ring), var(--shadow)}.pane{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px}.hint-line{margin:14px 0 10px;font-size:.95rem}.review{border-top:1px solid var(--line);margin-top:18px;padding-top:14px}.review-head{flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:10px;display:flex}.review-head .ghost{margin-left:auto}.review-list{flex-direction:column;gap:8px;max-height:340px;margin:0 0 14px;padding:0;list-style:none;display:flex;overflow-y:auto}.review-row{grid-template-columns:1fr auto 1fr auto;align-items:center;gap:10px;display:grid}.review-row input{padding:10px 13px}.review-list{gap:10px}.marker-bar{flex-wrap:wrap;align-items:center;gap:12px;margin-top:14px;display:flex}.seg{background:var(--surface-2);border:1px solid var(--line);border-radius:14px;gap:4px;padding:4px;display:inline-flex}.seg button{min-height:38px;color:var(--ink-soft);border-radius:10px;padding:0 18px;font-size:.95rem;font-weight:600}.seg button:not(:disabled):hover{color:var(--ink)}.seg button.on{background:var(--surface);color:var(--ink);box-shadow:var(--shadow)}.marker-layout{flex-wrap:wrap;align-items:flex-start;gap:18px;display:flex}.surface{border-radius:10px;flex:420px;min-width:0;max-height:70vh;overflow:auto}.canvas-wrap{border:1px solid var(--line);touch-action:none;-webkit-user-select:none;user-select:none;background:#fff;border-radius:10px;max-width:100%;position:relative;overflow:hidden}.canvas-wrap.boxing{cursor:crosshair}.canvas-wrap canvas{display:block}.line-hit{cursor:pointer;border-radius:3px;transition:background .1s;position:absolute}.line-hit:hover{background:color-mix(in srgb, var(--accent) 45%, transparent);box-shadow:0 0 0 2px color-mix(in srgb, var(--accent) 60%, transparent)}.drag-rect{border:2px dashed var(--brand);background:color-mix(in srgb, var(--brand) 16%, transparent);pointer-events:none;position:absolute}.ocr-overlay{color:#fff;background:#14121f9e;place-content:center;justify-items:center;gap:10px;font-weight:600;display:grid;position:absolute;inset:0}.spinner{border:3px solid #ffffff4d;border-top-color:#fff;border-radius:50%;width:30px;height:30px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.draft{background:var(--surface-2);border:1px solid var(--line);border-radius:12px;flex:0 300px;padding:14px;position:sticky;top:14px}.draft h3{color:var(--ink-soft);font-size:.95rem}.slot{text-align:left;background:var(--surface);border:2px dashed var(--line);width:100%;color:inherit;cursor:text;border-radius:10px;margin-bottom:10px;padding:10px 12px;display:block}.slot.active{border-style:solid;border-color:var(--brand);box-shadow:0 0 0 3px color-mix(in srgb, var(--brand) 16%, transparent)}.slot-tag{text-transform:uppercase;letter-spacing:.08em;color:var(--ink-soft);margin-bottom:3px;font-size:.72rem;display:block}.slot textarea{width:100%;color:inherit;resize:vertical;background:0 0;border:none;border-radius:0;max-height:8em;padding:0;font-size:.95rem;line-height:1.45;display:block}.slot textarea:focus{outline:none}.slot textarea::placeholder{color:var(--ink-soft)}.pager{color:var(--ink-soft);align-items:center;gap:8px;font-size:.9rem;display:inline-flex}.cloze-launch{background:var(--surface-2);border:1px dashed var(--line);border-radius:var(--radius-sm);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin:18px 0;padding:16px 20px;display:flex}.cloze-launch p{margin:2px 0 0;font-size:.9rem}.modal-overlay{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:100;background:#0f0c1e8c;place-items:center;padding:24px;animation:.15s overlay-in;display:grid;position:fixed;inset:0}@keyframes overlay-in{0%{opacity:0}}.modal{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow-lg);width:min(640px,100%);max-height:min(88vh,780px);padding:26px 28px 22px;animation:.2s cubic-bezier(.2,.9,.3,1) modal-in;overflow-y:auto}@keyframes modal-in{0%{opacity:0;transform:translateY(10px)scale(.98)}}.modal.confirm{text-align:center;width:min(460px,100%);padding:30px 28px 24px}.confirm-icon{background:color-mix(in srgb, var(--brand) 14%, var(--surface));width:52px;height:52px;color:var(--brand);border-radius:50%;place-items:center;margin:0 auto 16px;font-size:1.6rem;font-weight:800;display:grid}.confirm-icon.danger{background:color-mix(in srgb, var(--bad) 16%, var(--surface));color:var(--bad)}.modal.confirm h2{margin-bottom:10px;font-size:1.3rem}.confirm-body{color:var(--ink-soft);font-size:.98rem}.confirm-body p{margin:0 0 8px}.confirm-subject{color:var(--ink);word-break:break-word;font-weight:700}.confirm-note{background:color-mix(in srgb, var(--bad) 8%, 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var(--line);border-radius:4px;width:15px;height:15px;display:inline-block}.swatch:not(:first-child){margin-left:14px}.swatch.sentence{background:var(--hl-sentence)}.swatch.blank{background:var(--hl-blank)}.cloze-preview{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius-sm);margin-bottom:16px;padding:14px 16px}.cloze-preview p{margin:4px 0 0;font-size:1.02rem}.cloze-preview .hl-blank{color:var(--ink);padding:1px 6px;font-weight:600}.cloze-answer{border-top:1px solid var(--line);color:var(--ink-soft);margin:10px 0 0;padding-top:10px;font-size:.92rem}.cloze-answer:before{content:none}.blank-chips{flex-wrap:wrap;gap:8px;margin:0 0 14px;display:flex}.chip{background:color-mix(in srgb, var(--hl-blank) 45%, var(--surface));border:1px solid color-mix(in srgb, var(--hl-blank) 80%, var(--line));color:var(--ink);border-radius:99px;align-items:center;gap:6px;padding:5px 6px 5px 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.14s}.card-row:last-child{border-bottom:none}.card-table h3{margin-bottom:12px;font-size:1.1rem}.card-table li:last-child{border-bottom:none}.cell{text-overflow:ellipsis;white-space:nowrap;align-items:center;gap:8px;display:flex;overflow:hidden}.cell.a{color:var(--ink-soft)}.cell.level{color:var(--ink-soft);gap:8px;font-size:.85rem;font-weight:600}.level-dot{background:var(--dot);border-radius:99px;flex:none;width:9px;height:9px}.progress{background:var(--surface-2);border:1px solid var(--line);border-radius:99px;flex:1;min-width:120px;height:10px;overflow:hidden}.progress-fill{background:linear-gradient(90deg, var(--brand), var(--good));height:100%;transition:width .35s}.study-count{color:var(--ink-soft);font-variant-numeric:tabular-nums}.study{flex-direction:column;min-height:calc(100vh - 150px);display:flex}.study-main{flex-wrap:wrap;flex:1;justify-content:center;align-items:center;gap:clamp(24px,4vw,64px);margin:16px 0 28px;display:flex}.scope-tag{color:var(--brand);background:color-mix(in srgb, var(--brand) 12%, transparent);border-radius:99px;padding:5px 12px;font-size:.85rem;font-weight:600}.buddy{flex-direction:column;flex:none;align-items:center;gap:6px;width:190px;display:flex}.box-scale{align-items:center;gap:5px;height:14px;display:flex}.box-dot{background:var(--dot);opacity:.25;border-radius:99px;width:15px;height:7px;transition:opacity .35s,transform .35s,box-shadow .35s}.box-dot.on{opacity:1;box-shadow:0 0 0 3px color-mix(in srgb, var(--dot) 28%, transparent);transform:scaleY(1.7)}.box-badge{color:var(--ink-soft);background:var(--surface);border:1px solid var(--line);border-radius:99px;padding:3px 10px;font-size:.8rem}.grade-row{justify-content:center;gap:16px;display:flex}.rating{text-align:center}.rating-prompt{color:var(--ink-soft);margin-bottom:14px;font-size:.95rem}.rating-row{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.rate{background:color-mix(in srgb, var(--dot) 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10px}.rate-label{font-size:.78rem}}.grade{color:#fff;border-radius:16px;justify-content:center;align-items:center;gap:10px;min-width:230px;min-height:56px;padding:0 28px;font-size:1.05rem;font-weight:600;transition:transform .12s,filter .16s;display:inline-flex}.grade:hover{filter:brightness(1.08)}.grade:active{transform:scale(.975)}.grade.bad{background:var(--bad)}.grade.good{background:var(--good)}.card-stage{perspective:1400px;width:min(780px,100%);height:clamp(300px,52vh,520px);transition:transform .35s,opacity .35s;animation:.3s cubic-bezier(.2,.9,.3,1) deal;position:relative}@keyframes deal{0%{opacity:0;transform:translateY(26px)scale(.94)rotate(-2deg)}}.card-stage.exit-right{opacity:0;transform:translate(60%)rotate(9deg)}.card-stage.exit-left{opacity:0;transform:translate(-60%)rotate(-9deg)}.card-ghost{background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:24px;position:absolute;inset:0}.card-ghost-1{opacity:.75;transform:translateY(9px)scale(.975)}.card-ghost-2{opacity:.45;transform:translateY(18px)scale(.95)}.card{width:100%;height:100%;min-height:0;transform-style:preserve-3d;background:0 0;border:none;border-radius:20px;padding:0;transition:transform .62s cubic-bezier(.36,.66,.2,1);position:relative}.card.flipped{transform:rotateY(180deg)}.card:not(:disabled):hover{transform:translateY(-3px)}.card.flipped:not(:disabled):hover{transform:rotateY(180deg)translateY(-3px)}.card-face{backface-visibility:hidden;border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow-lg);text-align:center;border-radius:24px;flex-direction:column;justify-content:center;align-items:center;gap:16px;padding:40px 34px;display:flex;position:absolute;inset:0}.card-echo{border-bottom:1px solid 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var(--surface)));justify-content:flex-start;padding-top:46px;transform:rotateY(180deg)}.card-tag{letter-spacing:.1em;text-transform:uppercase;color:var(--ink-soft);font-size:.72rem;font-weight:700;position:absolute;top:18px;left:22px}.card-body{flex-direction:column;flex:1;justify-content:center;align-items:center;gap:12px;width:100%;min-height:0;display:flex;overflow-y:auto}.card-image{object-fit:contain;background:#fff;border-radius:10px;max-width:100%;max-height:min(46vh,340px)}.card-stage.with-image{height:clamp(360px,64vh,640px)}.card-text{color:var(--ink);letter-spacing:-.015em;max-height:100%;margin:0;font-size:clamp(1.15rem,1rem + 1vw,1.85rem);font-weight:600;overflow-y:auto}.card-hint{color:var(--ink-soft);font-size:.8rem;position:absolute;bottom:18px}.done-panel{text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);max-width:720px;margin:0 auto;padding:48px 32px}.done-panel h2{font-size:2rem}.done-panel 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6px;font-size:1.1rem;line-height:1.2}.field-pair{flex-direction:column}.card-stage{height:clamp(200px,34vh,300px)}.card-stage.with-image{height:clamp(240px,44vh,360px)}.card-image{max-height:26vh}.study{min-height:0}.study-main{gap:14px;margin:10px 0 16px}.buddy{--mascot-h:96px;gap:4px;width:auto}.rating-prompt{display:none}.rating-row{flex-wrap:nowrap;gap:6px}.rate{flex:1 1 0;gap:3px;min-width:0;padding:8px 4px 7px}.rate-key{width:30px;height:30px;font-size:1rem}.rate-label{-webkit-hyphens:auto;hyphens:auto;font-size:.62rem;line-height:1.15}.buddy{--mascot-h:80px}.app.studying .foot{display:none}.study-top{gap:8px;margin-bottom:12px}.study-top .scope-tag.quiet{display:none}.box-badge{padding:2px 8px;font-size:.72rem}.card-echo{max-height:3.4em;font-size:.85rem}.review-row{grid-template-columns:1fr auto}}@media (prefers-reduced-motion:reduce){.card-stage{animation:none}.card,.card-stage,.progress-fill,.mastery-fill{transition-duration:.01ms}}