:root{font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","Malgun Gothic",sans-serif;color:#253048;background:#f7f8fc;font-synthesis:none;--blue:#4255ff;--border:#e4e7f0}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,a,label{-webkit-tap-highlight-color:transparent}button,.file-button{cursor:pointer;border:1px solid var(--border);background:white;color:#35405a;border-radius:10px;padding:11px 16px;font-weight:600}button:hover,.file-button:hover{border-color:#8a96ff;background:#f0f2ff}button:disabled{opacity:.48;cursor:default}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #8491ff;outline-offset:3px}[hidden]{display:none!important}.header{height:78px;background:white;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:22px;padding:0 34px;position:sticky;top:0;z-index:5}.brand{font-size:22px;font-weight:800;display:flex;align-items:center;gap:12px;letter-spacing:-.7px}.brand-icon{display:inline-grid;place-items:center;width:36px;height:36px;background:var(--blue);color:white;border-radius:11px;font-size:24px}.personal{font-size:13px;color:#737d94}.header #install{margin-left:auto}.layout{display:grid;grid-template-columns:240px minmax(0,1fr);min-height:calc(100vh - 78px)}aside{background:white;border-right:1px solid var(--border);padding:30px 20px;display:flex;flex-direction:column;gap:12px}.nav-item{display:block;text-align:left;width:100%;border:0;background:transparent;padding:13px;font-size:14px;border-radius:10px}.nav-item:hover{background:#eff1ff}.aside-label{margin:25px 12px 0;color:#8a91a3;font-size:12px}.aside-bottom{margin-top:auto;padding:35px 10px 0;font-size:12px;color:#6d7890}.aside-bottom p{font-size:11px;line-height:1.7}.aside-bottom button,.aside-bottom .file-button{display:block;text-align:center;width:100%;font-size:12px;margin-top:10px}.status-dot{display:inline-block;width:7px;height:7px;background:#36ad87;border-radius:50%;margin-right:6px}main{max-width:1200px;width:100%;padding:44px 54px 60px;margin:0 auto}.eyebrow{color:var(--blue);font-size:12px;font-weight:800;letter-spacing:1px;margin:0 0 12px}h1{font-size:32px;letter-spacing:-1px;margin:0 0 12px;overflow-wrap:anywhere}h2{font-size:20px;letter-spacing:-.5px}p{line-height:1.8}.muted{color:#7a8398;font-size:14px}.topline{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:25px}.primary{background:var(--blue);color:white;border-color:var(--blue)}.primary:hover{background:#3344df;color:white}.hero{border:1px solid #e0e4ff;border-radius:20px;background:linear-gradient(110deg,#edf0ff,#f4f6ff 75%,#e8f6f8);padding:28px 32px;margin:28px 0 32px;display:flex;justify-content:space-between;gap:20px;align-items:center}.hero h2{margin:0 0 8px}.hero p{margin:0;font-size:14px;color:#6b7693}.hero-symbol{font-size:46px;color:#7987ee;transform:rotate(-12deg)}.search{width:100%;padding:14px 16px;border:1px solid var(--border);border-radius:12px;background:white;margin-bottom:22px}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px}.set-card{background:white;border:1px solid var(--border);border-radius:15px;padding:22px;min-height:180px;text-align:left;display:flex;flex-direction:column;align-items:flex-start;box-shadow:0 3px 8px #26305b03}.set-card:hover{box-shadow:0 8px 24px #26305b0c;transform:translateY(-2px)}.set-card h2{margin:14px 0 7px;font-size:18px;overflow-wrap:anywhere}.set-card .tag{font-size:11px;color:#7181a3;background:#f1f4fb;padding:5px 9px;border-radius:6px}.set-card .count{font-size:12px;color:#8a91a5;margin-top:auto;padding-top:17px}.empty{padding:45px 20px;text-align:center;border:1px dashed #cfd5eb;border-radius:15px;background:white}.empty p{color:#7a8398}.toolbar,.modes,.options,.actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.toolbar{justify-content:space-between;margin-bottom:28px}.modes{margin:23px 0 18px}.modes button{flex:1;min-width:140px;white-space:nowrap}.modes button.active{background:var(--blue);border-color:var(--blue);color:white}.options{font-size:12px;color:#6d7790;margin-bottom:18px}.options label{display:flex;align-items:center;gap:6px}.options select{border:1px solid var(--border);padding:7px;border-radius:7px;background:white;max-width:160px}.study{background:white;border:1px solid var(--border);border-radius:20px;padding:28px;margin-bottom:28px}.study-meta{display:flex;align-items:center;justify-content:space-between;color:#8b93a6;font-size:12px;gap:10px}.flip{width:100%;min-height:250px;display:flex;align-items:center;justify-content:center;border:0;background:white;font-size:30px;font-weight:600;line-height:1.6;padding:35px;white-space:pre-wrap;overflow-wrap:anywhere;transition:background .2s}.flip:hover{background:#fafaff}.flip.back{color:#4255cc;background:#f9faff}.study-actions{display:flex;justify-content:center;gap:12px;margin-top:12px;flex-wrap:wrap}.study-actions button{min-width:95px}.question{text-align:center;font-size:25px;white-space:pre-wrap;overflow-wrap:anywhere;margin:35px 0}.choices{display:grid;grid-template-columns:1fr 1fr;gap:12px}.choices button{text-align:left;white-space:pre-wrap;overflow-wrap:anywhere;min-height:70px;font-weight:500}.answer-form{display:flex;gap:12px}.answer-form input{flex:1;min-width:0;padding:14px;border:1px solid var(--border);border-radius:10px}.feedback{padding:18px;background:#edf8f3;border-radius:12px;margin-top:22px;line-height:1.8}.feedback.wrong{background:#fff2ef;color:#9c4435}.feedback .actions{margin-top:12px}.feedback strong{white-space:pre-wrap;overflow-wrap:anywhere}.progress{height:5px;background:#eff1fa;border-radius:20px;margin:20px 0;overflow:hidden}.progress span{display:block;background:var(--blue);height:100%}.terms{border:1px solid var(--border);border-radius:14px;background:white;overflow:hidden}.term-row{display:grid;grid-template-columns:1fr 1.5fr 44px;gap:20px;padding:20px 24px;border-bottom:1px solid #eef0f5;align-items:center;font-size:14px}.term-row:last-child{border-bottom:0}.term-row span{white-space:pre-wrap;overflow-wrap:anywhere}.term-row button{padding:6px;border:0;background:transparent}.starred{color:#d79d27!important}.match-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.match-cell{min-height:80px;white-space:pre-wrap;overflow-wrap:anywhere;font-weight:500}.match-cell.selected{border:2px solid var(--blue);background:#eef0ff}.match-cell.matched{visibility:hidden}.stats{display:flex;gap:25px;flex-wrap:wrap;font-size:13px;color:#737e99;margin:12px 0 24px}.result{text-align:center;padding:25px}.result-number{font-size:54px;color:var(--blue);font-weight:800}.result-list{text-align:left;margin:25px 0}.result-item{padding:15px 0;border-bottom:1px solid var(--border);overflow-wrap:anywhere;white-space:pre-wrap}.danger{color:#b34745}.mobile-backup{display:none}dialog{border:0;border-radius:20px;padding:30px;max-width:850px;width:calc(100% - 32px);max-height:90vh;box-shadow:0 20px 100px #1e285738}dialog::backdrop{background:#17213d70}dialog h2{margin-top:0}dialog label{display:block;font-size:12px;color:#6a7691;margin:15px 0 7px}dialog input,dialog textarea,dialog select{width:100%;border:1px solid var(--border);border-radius:9px;padding:11px;color:#253048;background:white}dialog textarea{resize:vertical}dialog .row{display:grid;grid-template-columns:1fr 1fr 42px;gap:10px;margin-bottom:12px;align-items:start}dialog .row button{padding:11px 8px}dialog .pair-labels{display:grid;grid-template-columns:1fr 1fr 42px;gap:10px}.dialog-actions{margin-top:22px;display:flex;justify-content:flex-end;gap:10px}details{margin:18px 0}summary{cursor:pointer;font-size:13px;color:var(--blue)}#notice{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:#253048;color:white;border-radius:12px;padding:13px 20px;font-size:13px;max-width:90vw;z-index:20;display:none}#notice.visible{display:block}.storage-note{font-size:12px;color:#8a91a5;margin-top:28px;line-height:1.8}
@media(max-width:950px){main{padding:35px 28px}.layout{grid-template-columns:190px minmax(0,1fr)}aside{padding:25px 12px}.personal{display:none}}@media(max-width:650px){.header{height:66px;padding:0 20px}.brand{font-size:20px}.layout{display:block;min-height:calc(100vh - 66px)}aside{display:none}main{padding:28px 20px 85px}h1{font-size:26px}.hero{padding:23px}.hero-symbol{display:none}.grid{grid-template-columns:1fr}.study{padding:18px}.flip{font-size:25px;min-height:220px;padding:20px}.choices{grid-template-columns:1fr}.term-row{padding:18px 15px;gap:12px;grid-template-columns:1fr 1.2fr 32px}.modes{gap:7px}.modes button{min-width:calc(50% - 7px);font-size:13px}.answer-form{flex-direction:column}.mobile-backup{display:flex;position:fixed;bottom:0;width:100%;justify-content:center;gap:10px;background:#ffffffed;border-top:1px solid var(--border);padding:10px 12px max(10px,env(safe-area-inset-bottom));z-index:6}.mobile-backup button,.mobile-backup .file-button{font-size:11px;padding:9px 12px}#notice{bottom:75px}.topline{align-items:flex-start}.toolbar button{font-size:12px}.study-actions button{min-width:75px}dialog{padding:22px}dialog .row{grid-template-columns:1fr 1fr 32px;gap:7px}.options{gap:12px}.match-cell{font-size:13px;padding:12px}.stats{gap:12px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}
.card-image{display:block;width:auto;max-width:100%;max-height:240px;object-fit:contain;border-radius:10px;margin:12px auto 0}.flip{flex-direction:column}.term-row .card-image{max-height:100px;margin-left:0}.match-cell .card-image{max-height:100px}.photo-editor{grid-column:1 / 3;font-size:12px}.photo-editor .file-button{display:inline-block;margin:0}.photo-input{display:block;width:100%;max-width:260px;font-size:12px;margin-top:7px}.photo-preview .card-image{max-height:130px;margin-left:0}.photo-status{display:block;margin:7px 0;color:#6d7790}.photo-editor:empty{display:none}

@media print{body{background:white}.header,aside,.toolbar,.modes,.options,.mobile-backup,#notice,dialog,.terms,main>h2,.study button{display:none!important}.layout{display:block}main{max-width:none;padding:0}.study{border:0;padding:0}.result-item{break-inside:avoid}.result{text-align:left}.result-list{margin:0}.study-meta{color:black}.choices input{appearance:auto}}
.photo-editor[data-side=term]{grid-column:1}.photo-editor[data-side=definition]{grid-column:2}.photo-editor .file-button{width:100%;padding:8px}.photo-input{max-width:100%;min-width:0}.photo-editor{min-width:0}
#backup-result{margin:12px auto;padding:14px 20px;max-width:900px;background:#edf8f3;border-radius:10px;font-size:13px}#backup-result a{color:#3344df;text-decoration:underline;font-weight:700}
#backup-result textarea{display:block;width:100%;margin-top:10px;border:1px solid var(--border);border-radius:9px;font-family:monospace;font-size:12px;padding:10px}#backup-result button{padding:7px 10px;margin-left:10px;font-size:12px}
.offline-status{margin:0;padding:8px 20px;text-align:center;font-size:12px;color:#586380;background:#f0f3ff}#install-guide{max-width:560px}#install-guide h3{font-size:16px;margin:22px 0 8px}#install-guide ol{padding-left:24px;line-height:1.8;font-size:14px}#install-guide li{margin-bottom:8px}#install-guide .muted{font-size:13px}
@media(max-width:650px){.header{padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right));gap:10px}.header #install{font-size:12px;padding:10px;white-space:nowrap}.brand{font-size:18px;gap:8px}main{padding-left:max(20px,env(safe-area-inset-left));padding-right:max(20px,env(safe-area-inset-right))}dialog input,dialog textarea,dialog select,.answer-form input,.search,.options select,.options input[type=number]{font-size:16px}#backup-result{margin:12px 16px 100px}#backup-result button{display:block;margin:10px 0 0}.offline-status{font-size:11px}.mobile-backup{padding-left:max(10px,env(safe-area-inset-left));padding-right:max(10px,env(safe-area-inset-right))}}
@media print{.offline-status,#backup-result,#install-guide{display:none!important}}