@font-face{font-family:Study Sans;src:local("Nunito Sans");font-display:swap}html,body{font-family:Nunito Sans,Segoe UI,Arial,sans-serif}:root{font-family:Study Sans,Segoe UI,Arial,sans-serif;color:#2e3447;background:#f2f4f8;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;--bg:#f2f4f8;--surface:#fff;--soft:#f6f7fb;--line:#e9ebf2;--ink:#2e3447;--muted:#69728b;--blue:#5055ff;--blue-soft:#edeefe;--orange:#c14b00;--green:#008c70;--shadow:0 4px 40px rgba(30,39,70,.075);--radius:18px;color-scheme:light}:root[data-theme=dark]{color-scheme:dark;--bg:#141724;--surface:#202435;--soft:#2a3044;--line:#373e52;--ink:#eef0fa;--muted:#abb3cb;--blue:#a3a5ff;--blue-soft:#343559;--orange:#ffad75;--green:#51d7b4;--shadow:0 4px 40px rgba(0,0,0,.16);background:var(--bg);color:var(--ink)}*{box-sizing:border-box}body{margin:0;min-width:320px;background:var(--bg)}button,input,select,textarea{font:inherit}button{cursor:pointer}button{color:inherit}button:disabled{cursor:default;opacity:.4}button:not(:disabled):active{transform:scale(.98)}button,input,textarea,select,a{-webkit-tap-highlight-color:transparent}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid var(--blue);outline-offset:4px}button{transition:background .16s,color .16s,transform .16s}button svg{flex-shrink:0}h1,h2,h3,p{margin-top:0}h1{font-size:32px;line-height:1.25;letter-spacing:-.7px}h2{font-size:22px;letter-spacing:-.3px}h3{font-size:18px}p{line-height:1.6}button{border:0;background:none}a{color:var(--blue)}.muted{color:var(--muted)}.small{font-size:13px}.eyebrow{text-transform:uppercase;letter-spacing:1.7px;font-size:11px;font-weight:700;color:var(--muted)}.dot-divider{padding:0 9px;color:var(--muted)}.app-header{height:64px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 28px;position:relative;gap:20px;background:var(--bg)}.mode-area{position:relative;justify-self:start}.mode-button{display:flex;align-items:center;gap:11px;padding:12px 0;font-size:16px;font-weight:600;color:#51607c}.brand-mark{display:inline-block;width:20px;height:19px;position:relative;margin-right:1px}.brand-mark:before,.brand-mark:after{content:"";position:absolute;border-radius:2px;width:17px;height:14px}.brand-mark:before{background:#42c9ff;left:5px;top:6px}.brand-mark:after{background:#5055ff;left:0;top:2px}.mode-button>svg{margin-left:2px}.deck-heading{display:flex;flex-direction:column;gap:6px;font-size:15px;font-weight:600;line-height:1.2;padding:5px 10px;color:var(--ink);max-width:40vw}.deck-heading>span:last-child{max-width:100%;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.position{font-variant-numeric:tabular-nums}.position strong{font-weight:700}.header-actions{display:flex;gap:8px;align-items:center;justify-self:end}.icon-button{width:42px;height:42px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;color:#596888;flex-shrink:0;padding:0}.icon-button:hover:not(:disabled){background:var(--soft);color:var(--blue)}.icon-button.active{background:var(--blue-soft);color:var(--blue)}[data-theme=dark] .icon-button,[data-theme=dark] .mode-button{color:var(--muted)}.questions-button{display:flex;align-items:center;gap:10px;background:var(--soft);padding:12px 19px;border-radius:24px;font-size:14px;font-weight:600;white-space:nowrap;color:#52617d}.questions-button svg{color:var(--blue)}.questions-button:hover{background:var(--blue-soft)}.local-label{font-size:13px;color:var(--muted)}.top-progress{position:absolute;height:2px;left:0;right:0;bottom:0;overflow:hidden}.top-progress span{display:block;background:#8082ff;height:100%;transform-origin:left;transition:transform .3s ease-out}.study-region{width:100%}.study-main{max-width:1024px;margin:40px auto 0;width:calc(100% - 64px)}.score-row{display:flex;justify-content:space-between;align-items:center;height:29px;margin-bottom:16px;font-size:14px;font-weight:600;position:relative}.score-row.no-sorting{visibility:hidden}.score{display:flex;align-items:center;gap:9px}.learning{color:var(--orange)}.know{color:var(--green)}.count{border:1px solid;border-radius:30px;min-width:40px;height:29px;display:flex;align-items:center;justify-content:center;line-height:1;font-weight:700;font-size:15px}.learning .count{border-color:#ffbf91;background:#fff8f1}.know .count{border-color:#86e5c7;background:#edfff7}[data-theme=dark] .learning .count{background:#4b342b;border-color:#8d5d42}[data-theme=dark] .know .count{background:#20463f;border-color:#3d806e}.round-label{position:absolute;left:50%;transform:translate(-50%);font-size:12px;color:var(--muted)}.flashcard{height:clamp(370px,calc(100dvh - 264px),646px);background:var(--surface);border-radius:var(--radius);position:relative;box-shadow:var(--shadow);perspective:1600px;isolation:isolate}.card-top{position:absolute;top:18px;left:28px;right:24px;display:flex;align-items:center;justify-content:space-between;z-index:2;pointer-events:none}.card-top button{pointer-events:auto}.hint-button{padding:10px;display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;border-radius:8px}.hint-button:hover,.hint-active{background:var(--soft)}.card-tools{display:flex;gap:0;align-items:center}.card-tools .icon-button{width:36px;height:36px}.card-tools .icon-button svg{width:18px;height:18px}.star-button{opacity:0}.flashcard:hover .star-button,.star-button:focus-visible,.star-button.starred{opacity:1}.starred{color:#d99000!important}.starred svg{fill:#ffce4a}.card-flip-target{display:block;width:100%;height:100%;padding:0;border-radius:inherit;cursor:pointer;position:relative;background:transparent;color:var(--ink);text-align:center;touch-action:pan-y;isolation:isolate}.card-flip-target:active:not(:disabled){transform:none}.card-flip-target:focus-visible{outline-offset:6px}.flip-inner{position:absolute;inset:0;transform-style:preserve-3d;transition:transform .48s cubic-bezier(.45,0,.2,1)}.is-flipped .flip-inner{transform:rotateX(180deg)}.card-content{position:absolute;inset:54px 44px;display:flex;align-items:center;justify-content:center;backface-visibility:hidden;-webkit-backface-visibility:hidden;gap:40px}.card-content.with-image{display:grid;grid-template-columns:1fr 1fr;gap:52px}.card-word{font-size:32px;line-height:1.45;font-weight:400;white-space:pre-wrap;overflow-wrap:anywhere;max-height:100%;overflow-y:auto;scrollbar-width:thin}.card-word.long-text{font-size:24px}.card-content img{width:100%;max-height:min(400px,100%);object-fit:contain;border-radius:3px;-webkit-user-select:none;user-select:none;display:block}.hint-bubble{position:absolute;top:67px;left:38px;max-width:calc(100% - 76px);padding:12px 16px;border:1px solid #dddfff;border-radius:10px;background:var(--blue-soft);color:var(--ink);font-size:14px;line-height:1.5;z-index:3;box-shadow:0 4px 12px #242f5010;overflow-wrap:anywhere}.study-toolbar{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;min-height:78px;gap:18px}.tracking-control{justify-self:start}.toggle-row{display:flex;position:relative;align-items:center;justify-content:space-between;gap:16px;cursor:pointer}.toggle-row input{position:absolute;right:0;opacity:0;width:36px;height:26px;z-index:1;cursor:pointer}.switch{display:inline-block;position:relative;flex-shrink:0;width:34px;height:16px;border-radius:20px;background:#cbd0de;transition:background .2s}.switch:after{content:"";display:block;position:absolute;left:0;top:-2px;width:20px;height:20px;border-radius:50%;background:#9199ad;transition:transform .2s,background .2s;box-shadow:0 2px 3px #202b4420}.toggle-row input:checked+.switch{background:#d7d8ff}.toggle-row input:checked+.switch:after{transform:translate(14px);background:var(--blue)}.toggle-row input:focus-visible+.switch{outline:3px solid var(--blue);outline-offset:4px}.toggle-row.disabled{opacity:.5;cursor:default}.toggle-label{font-size:15px;font-weight:600}.toggle-row small{display:block;font-size:13px;color:var(--muted);margin-top:6px;line-height:1.5}.tracking-control .toggle-row{gap:11px;color:var(--blue)}.primary-controls{display:flex;gap:32px}.grade-button{width:76px;height:48px;border-radius:28px;background:var(--soft);display:flex;align-items:center;justify-content:center;color:#596888}.grade-button:hover:not(:disabled){background:var(--blue-soft)}.learning-button{color:var(--orange)}.know-button{color:var(--green)}.learning-button:hover:not(:disabled){background:#fff0e8}.know-button:hover:not(:disabled){background:#e9fbf5}[data-theme=dark] .learning-button:hover:not(:disabled),[data-theme=dark] .know-button:hover:not(:disabled){background:var(--soft)}.right-controls{display:flex;gap:12px;justify-self:end}.right-controls .icon-button:last-child{background:var(--soft)}.secondary-toolbar{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;margin-top:0;padding-bottom:0;color:var(--muted);font-size:12px}.secondary-toolbar>div{display:flex;gap:1px;align-items:center}.secondary-toolbar>div:last-child{justify-self:end}.secondary-toolbar .icon-button{width:34px;height:34px}.secondary-toolbar .icon-button svg{width:18px;height:18px}.flip-guidance{opacity:.8}kbd{font-family:inherit;border:1px solid var(--line);border-bottom-width:2px;padding:2px 5px;border-radius:5px;font-size:11px;background:var(--soft)}.results{padding:50px 28px;display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center;overflow:auto}.results h1{font-size:30px;max-width:500px;margin:16px 0 12px}.results p{font-size:15px;color:var(--muted);margin-bottom:20px}.result-icon{width:76px;height:76px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#e9fbf5;color:var(--green);margin-bottom:22px}.result-tallies{display:flex;gap:48px;margin:10px 0 30px}.result-tallies span{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted)}.result-tallies strong{font-size:30px;color:var(--ink);font-weight:600}.result-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:16px}.primary,.secondary,.danger-button{border-radius:10px;min-height:44px;padding:11px 18px;display:inline-flex;align-items:center;justify-content:center;gap:9px;font-size:14px;font-weight:600;line-height:1.4;white-space:nowrap}.primary{background:#5055ff;color:#fff}.primary:hover:not(:disabled){background:#3f43da}.secondary{background:var(--soft);color:var(--ink);border:1px solid var(--line)}.secondary:hover:not(:disabled){background:var(--blue-soft)}.danger-button{background:#bd353e;color:#fff}.danger-button:hover:not(:disabled){background:#a22932}.text-button{display:inline-flex;align-items:center;justify-content:center;gap:7px;color:var(--blue);padding:9px 3px;font-size:14px;font-weight:600;border-radius:5px}.danger-text{color:#bd353e}.text-button:hover:not(:disabled){text-decoration:underline}.modal-backdrop{position:fixed;inset:0;background:#161e3b66;display:flex;align-items:center;justify-content:center;z-index:10;padding:28px;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.dialog{width:min(100%,520px);max-height:calc(100dvh - 56px);display:flex;flex-direction:column;background:var(--surface);border-radius:20px;box-shadow:0 20px 100px #10162e30;animation:appear .18s ease-out}.dialog.wide{width:min(100%,880px)}.dialog-header{display:flex;align-items:center;justify-content:space-between;padding:24px 28px 18px;gap:15px;border-bottom:1px solid var(--line);flex-shrink:0}.dialog-header h2{font-size:23px;margin:0;line-height:1.3;overflow-wrap:anywhere}.dialog-header .icon-button{margin-right:-8px}.dialog-content{padding:24px 28px;overflow-y:auto;overscroll-behavior:contain;min-height:0;scrollbar-width:thin}.dialog-content>p:last-child{margin-bottom:0}.dialog-footer{display:flex;gap:10px;justify-content:flex-end;align-items:center;border-top:1px solid var(--line);padding:18px 28px;flex-shrink:0;flex-wrap:wrap}.dialog-content .toggle-row{padding:15px 0}.dialog-content .field{margin-top:18px}.dialog-content .field:first-child{margin-top:0}.settings-section{font-size:12px;text-transform:uppercase;letter-spacing:1.3px;color:var(--muted);margin:30px 0 5px}.settings-section:first-child{margin-top:0}.field{display:flex;flex-direction:column;gap:9px;font-size:13px;font-weight:600;color:var(--ink)}input,textarea,select{border:1px solid #d8dce8;background:var(--surface);color:var(--ink);border-radius:9px;padding:12px 13px;line-height:1.5;width:100%;min-width:0;font-size:14px;font-weight:400}textarea{resize:vertical;min-height:70px}input::placeholder,textarea::placeholder{color:#8a91a5}select{padding-right:30px}input:hover,textarea:hover,select:hover{border-color:#9ea6be}input:focus,textarea:focus,select:focus{border-color:var(--blue)}.segmented{background:var(--soft);display:grid;grid-template-columns:1fr 1fr;padding:4px;border-radius:10px;gap:4px}.segmented button{padding:10px;border-radius:7px;font-size:14px}.segmented button[aria-pressed=true]{background:var(--surface);box-shadow:0 2px 6px #1a255213;color:var(--blue)}.advanced-audio{margin:6px 0 24px}.advanced-audio summary{font-size:13px;color:var(--blue);cursor:pointer;padding:8px 0}.restart-option{margin-top:24px}.shortcuts{margin:22px 0}.shortcuts>div{display:flex;justify-content:space-between;gap:15px;padding:13px 0;border-bottom:1px solid var(--line);font-size:14px}.shortcuts dd{margin:0}.shortcuts kbd{font-size:12px}.menu-dismiss{position:fixed;inset:0;z-index:4}.mode-menu{position:absolute;top:52px;left:-8px;width:248px;border:1px solid var(--line);border-radius:14px;background:var(--surface);padding:8px;box-shadow:0 10px 30px #18244c1c;z-index:5}.mode-menu button{display:flex;width:100%;text-align:left;align-items:center;gap:12px;padding:14px 12px;font-size:14px;border-radius:8px}.mode-menu button:hover:not(:disabled){background:var(--soft)}.mode-menu button svg:last-child:not(:first-child){margin-left:auto;color:var(--blue)}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%,12px);z-index:20;background:#2e3447;color:#fff;box-shadow:0 5px 22px #1a23442b;border-radius:12px;padding:14px 20px;display:flex;gap:10px;align-items:center;font-size:14px;opacity:0;pointer-events:none;max-width:calc(100% - 32px);transition:opacity .2s,transform .2s}.toast.visible{opacity:1;transform:translate(-50%)}.toast:empty{padding:0}.storage-warning{padding:12px 24px;background:#fff3df;color:#7b4512;font-size:14px;text-align:center}.library{max-width:1040px;margin:72px auto;padding:0 32px}.library-intro{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:38px}.library-intro h1{font-size:36px;margin:12px 0}.library-intro p{font-size:15px;margin:0}.search-box{display:flex;gap:10px;align-items:center;max-width:400px;border:1px solid var(--line);border-radius:10px;padding:0 13px;margin-bottom:24px;color:var(--muted);background:var(--surface)}.search-box:focus-within{outline:2px solid var(--blue);outline-offset:3px}.search-box input{border:0;background:none;padding:12px 0;outline:none}.library-row{display:flex;align-items:center;gap:20px;border-top:1px solid var(--line);padding:25px 0}.library-row:last-child{border-bottom:1px solid var(--line)}.set-symbol{background:var(--blue-soft);color:var(--blue);width:62px;height:70px;border-radius:12px;display:flex;justify-content:center;align-items:center;flex-shrink:0}.library-set-title{text-align:left;flex:1;min-width:0;padding:0}.library-set-title h2{font-size:19px;margin:0 0 8px}.library-set-title>span{font-size:12px;color:var(--muted)}.library-set-title p{font-size:13px;color:var(--muted);margin:7px 0 0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.library-progress{font-size:12px;color:var(--muted);white-space:nowrap}.library-footer{display:flex;align-items:center;justify-content:center;gap:8px;font-size:12px;color:var(--muted);margin-top:35px}.saved-dot{width:6px;height:6px;border-radius:50%;background:var(--green);flex-shrink:0}.library-empty{padding:60px 16px;text-align:center;color:var(--muted)}.library-empty>svg{color:var(--blue);margin-bottom:20px}.library-empty h2{color:var(--ink)}.empty-search{text-align:center;color:var(--muted);padding:40px 0}.editor-intro{display:flex;align-items:center;justify-content:space-between;gap:18px;font-size:13px;margin-bottom:22px}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}.field-grid>.field{margin-top:18px!important}.editor-cards{padding:0;list-style:none;margin:30px 0 18px}.editor-card{border-top:1px solid var(--line);padding:16px 0 24px}.editor-card-toolbar{display:flex;align-items:center;justify-content:space-between;font-size:13px;font-weight:600;color:var(--muted)}.editor-card-toolbar>div{display:flex}.editor-card-toolbar .icon-button{width:32px;height:32px}.editor-card-toolbar .icon-button svg{width:17px;height:17px}.editor-card .field{margin-top:16px}.media-details{margin-top:18px}.media-details summary{font-size:12px;color:var(--muted);cursor:pointer;display:flex;gap:7px;align-items:center;padding:6px 0}.media-details summary:after{content:"+";margin-left:auto;font-size:18px}.media-details[open] summary:after{content:"−"}.attachment-dot{width:6px;height:6px;background:var(--blue);border-radius:50%}.media-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:12px 0}.media-field{border:1px solid var(--line);padding:15px;border-radius:9px;min-width:0}.media-field>.field{margin:0}.media-field img{max-width:100%;max-height:120px;object-fit:contain;margin-top:12px;display:block}.media-field audio{width:100%;height:38px;margin-top:12px}.media-actions{display:flex;align-items:center;justify-content:space-between;margin-top:10px;gap:8px}.file-button{font-size:12px;display:inline-flex;align-items:center;gap:6px;cursor:pointer;color:var(--blue);font-weight:600;border:1px solid var(--line);padding:8px 10px;border-radius:7px;position:relative;overflow:hidden}.file-button input{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%;padding:0}.file-button:focus-within{outline:2px solid var(--blue);outline-offset:3px}.media-actions .text-button{font-size:12px}.add-card{width:100%;min-height:54px;border:1px dashed #b7bdd3;border-radius:10px;color:var(--blue);display:flex;align-items:center;justify-content:center;gap:8px;font-weight:600;font-size:14px}.add-card:hover{background:var(--soft)}.footer-note{font-size:12px;color:var(--muted);margin-right:auto}.error-message{background:#fff0f0;border:1px solid #f0c8ca;border-radius:9px;padding:12px 14px;color:#a52c36;font-size:14px;line-height:1.5}.import-area{font-family:ui-monospace,monospace;font-size:13px}.export-option{display:grid;grid-template-columns:1fr auto;gap:6px 10px;text-align:left;padding:20px;border:1px solid var(--line);border-radius:12px;width:100%;margin:14px 0}.export-option strong{font-size:15px}.export-option span{font-size:12px;color:var(--muted)}.export-option svg{grid-column:2;grid-row:1 / span 2;align-self:center;color:var(--blue);transform:rotate(180deg)}.export-option:hover{background:var(--soft)}.footer-spacer{flex:1}.set-overview-meta{display:flex;justify-content:space-between;gap:15px;font-size:12px;color:var(--muted);margin:24px 0 12px}.term-row{display:grid;grid-template-columns:25px 1fr 1fr 36px;gap:16px;align-items:center;padding:16px 0;border-top:1px solid var(--line);font-size:14px;overflow-wrap:anywhere}.term-number{font-size:12px;color:var(--muted)}.term-row .icon-button{width:36px;height:36px}.question-meta{display:flex;justify-content:space-between;font-size:12px;font-weight:600;color:var(--muted);margin-bottom:28px}.question-prompt{font-size:27px;font-weight:500;line-height:1.5;margin-bottom:24px}.question-image{max-width:260px;max-height:160px;object-fit:contain;border-radius:6px;display:block;margin:0 0 24px}.question-options{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:20px}.question-answer{display:flex;align-items:center;gap:12px;text-align:left;min-height:72px;padding:16px;border:1px solid #cfd4e3;border-radius:10px;line-height:1.5;overflow-wrap:anywhere;font-size:15px}.question-answer>span{width:26px;height:26px;border:1px solid var(--line);border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:12px;flex-shrink:0;color:var(--muted)}.question-answer>svg{margin-left:auto;flex-shrink:0}.question-answer:hover:not(:disabled){border-color:var(--blue);background:var(--blue-soft)}.question-answer:disabled{opacity:1}.question-answer.correct{border-color:#18ab83;background:#e9fbf5;color:#007d60}.question-answer.incorrect{border-color:#d7565b;background:#fff0f0;color:#a52c36}.answer-feedback{background:var(--soft);padding:15px 18px;border-radius:9px;font-size:14px}.answer-feedback.positive{color:var(--green)}.question-results{text-align:center;padding:30px 0}.question-results .result-icon{margin:0 auto 20px}.question-results h3{font-size:26px}.typed-answer .primary{margin:20px 0}.loading-state{max-width:1024px;margin:85px auto;padding:0 32px;display:grid;gap:20px}.loading-state div{height:24px;background:var(--soft);border-radius:8px}.loading-state div:nth-child(2){height:450px}.loading-state div:last-child{height:44px;width:200px;justify-self:center}.error-state{padding:100px 24px;text-align:center}.error-state>svg{color:var(--blue);margin-bottom:25px}.error-state h1{font-size:27px}.error-state p{color:var(--muted)}@keyframes appear{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@media(max-width:1100px){.app-header{padding:0 24px}.questions-button{padding:11px 13px}.study-main{margin-top:30px}.card-content{inset:64px 36px 50px;gap:28px}.card-content.with-image{gap:28px}.card-word{font-size:29px}}@media(max-width:800px){.app-header{padding:0 16px;gap:10px}.mode-button{font-size:14px;gap:8px}.deck-heading{font-size:13px}.header-actions{gap:2px}.questions-button{width:40px;height:40px;padding:0;justify-content:center;background:none}.questions-button span{display:none}.icon-button{width:38px;height:38px}.study-main{width:calc(100% - 40px);margin-top:26px}.flashcard{height:clamp(370px,calc(100dvh - 254px),620px)}.card-top{left:17px;right:16px;top:14px}.card-content{inset:62px 28px 40px}.card-content.with-image{gap:24px}.card-word{font-size:26px}.primary-controls{gap:20px}.flip-guidance{font-size:11px}.secondary-toolbar{grid-template-columns:1fr 1fr;position:relative;padding-bottom:38px}.flip-guidance{position:absolute;top:42px;left:0;right:0;text-align:center}.secondary-toolbar>div:last-child{grid-column:2}.library{margin-top:45px;padding:0 24px}.library-row{gap:14px}.library-progress{display:none}.library-intro h1{font-size:30px}.library-set-title p{display:none}.set-symbol{width:48px;height:58px}.star-button{opacity:1}.card-word.long-text{font-size:20px}}@media(max-width:560px){.app-header{height:76px;grid-template-columns:auto 1fr auto;padding:0 12px;gap:4px}.mode-button>span:not(.brand-mark){display:none}.mode-button{gap:5px}.mode-button>svg{width:15px;margin:0}.brand-mark{transform:scale(.9)}.deck-heading{max-width:43vw;justify-self:center;padding:4px 0;gap:7px}.header-actions .icon-button{width:34px}.questions-button{width:30px}.questions-button svg{width:19px}.header-actions .icon-button svg{width:20px}.local-label{font-size:11px;max-width:140px;text-align:right}.study-main{margin-top:22px;width:calc(100% - 28px)}.score-row{font-size:12px;margin-bottom:13px}.count{min-width:33px;height:26px;font-size:13px}.flashcard{height:clamp(350px,calc(100dvh - 270px),630px);border-radius:15px}.card-top{top:10px;left:12px;right:10px}.hint-button{font-size:12px;padding:9px 6px;gap:5px}.hint-button svg{width:17px}.card-tools .icon-button{width:32px;height:34px}.card-content{inset:63px 25px 30px}.card-content.with-image{display:flex;flex-direction:column;gap:24px}.card-content.with-image img{width:auto;max-width:100%;max-height:52%;flex-shrink:1;min-height:0}.card-word{font-size:27px;line-height:1.45}.card-content.with-image .card-word{font-size:24px;max-height:42%;flex-shrink:0}.card-word.long-text{font-size:18px}.hint-bubble{top:58px;left:18px;max-width:calc(100% - 36px);font-size:12px;padding:9px 12px}.study-toolbar{gap:8px;min-height:76px;grid-template-columns:1fr auto 1fr}.tracking-control .toggle-row{gap:7px}.toggle-label{font-size:13px}.tracking-control .toggle-label{font-size:11px;white-space:nowrap}.tracking-control .switch{width:27px;height:14px}.tracking-control .switch:after{width:17px;height:17px}.tracking-control input:checked+.switch:after{transform:translate(10px)}.primary-controls{gap:10px}.grade-button{width:49px;height:43px}.grade-button svg{width:24px;height:24px}.right-controls{gap:0}.right-controls .icon-button{width:32px;height:34px}.right-controls .icon-button svg{width:20px;height:20px}.secondary-toolbar{margin-top:-4px;padding-bottom:24px}.secondary-toolbar>div:first-child>span{font-size:11px}.secondary-toolbar .icon-button{width:33px;height:33px}.flip-guidance{top:37px}.modal-backdrop{padding:12px}.dialog{border-radius:16px;max-height:calc(100dvh - 24px)}.dialog-header{padding:18px 20px 14px}.dialog-header h2{font-size:21px}.dialog-content{padding:20px}.dialog-footer{padding:14px 18px;gap:8px}.dialog-footer .primary,.dialog-footer .secondary,.dialog-footer .danger-button{font-size:12px;padding:10px 13px}.dialog-footer>.text-button{font-size:12px}.field-grid{grid-template-columns:1fr;gap:0}.editor-intro{align-items:flex-start;font-size:12px}.editor-intro .text-button{font-size:12px;flex-shrink:0}.media-grid{grid-template-columns:1fr}.editor-card-toolbar .icon-button{width:29px}.question-options{grid-template-columns:1fr;gap:10px}.question-answer{min-height:58px;font-size:14px}.question-prompt{font-size:24px}.question-image{max-height:120px}.results{padding:30px 18px}.results h1{font-size:25px}.results p{font-size:13px}.results .result-icon{width:60px;height:60px;margin-bottom:15px}.results .result-tallies{gap:25px;margin:0 0 20px}.result-tallies strong{font-size:25px}.result-tallies span{font-size:11px}.result-actions{gap:9px}.result-actions .primary,.result-actions .secondary{font-size:12px;padding:10px 14px}.library{margin-top:35px;padding:0 18px}.library-intro{align-items:flex-start;flex-direction:column;margin-bottom:26px;gap:18px}.library-intro h1{font-size:29px}.library-intro .eyebrow{font-size:10px}.library-intro p{font-size:13px}.search-box{max-width:none}.library-row{gap:10px;flex-wrap:wrap;position:relative;padding:22px 0}.library-set-title{min-width:calc(100% - 65px)}.library-row>.icon-button{margin-left:58px;width:34px;height:34px}.library-row>.secondary{margin-left:auto;font-size:12px;min-height:37px;padding:8px 13px}.library-row h2{font-size:18px}.library-footer{align-items:flex-start;text-align:center;line-height:1.6}.saved-dot{margin-top:6px}.set-overview-meta{flex-direction:column;gap:8px}.term-row{grid-template-columns:18px 1fr 30px;gap:9px;padding:15px 0;font-size:13px}.term-row>span:nth-child(3){grid-column:2;grid-row:2;color:var(--muted)}.term-row .icon-button{grid-column:3;grid-row:1 / span 2}.term-row .term-number{grid-row:1 / span 2}.toast{font-size:12px;padding:12px 15px;bottom:16px}.footer-spacer{display:none}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}.flip-inner,.toast{transition:none}}.study-card{background:transparent;box-shadow:none}.card-face{position:absolute;inset:0;border-radius:inherit;background:var(--surface);box-shadow:var(--shadow);backface-visibility:hidden;-webkit-backface-visibility:hidden}.card-face.back{transform:rotateX(180deg)}.flip-inner{border-radius:inherit}.study-region{overflow-x:clip}@font-face{font-family:Urbanist;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/urbanist-latin-500-normal-CTXUkCRo.woff2) format("woff2"),url(/assets/urbanist-latin-500-normal-DpQ4Tjrd.woff) format("woff")}@font-face{font-family:Urbanist;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/urbanist-latin-700-normal-BtsT2zLv.woff2) format("woff2"),url(/assets/urbanist-latin-700-normal-Zdugn5sa.woff) format("woff")}:root{font-family:Urbanist,sans-serif;--bg: #e7ecf7;--surface: #ffffff;--soft: #f0f3fa;--line: rgba(14, 22, 40, .1);--ink: #0e1628;--muted: #3b4252;--blue: #0f3fa6;--blue-soft: #e7ecf7;--red: #d8232a;--orange: #b64b17;--green: #08785f;--shadow: none;--radius: 24px;background:var(--bg);color:var(--ink)}:root[data-theme=dark]{--bg: #0e1628;--surface: #17243e;--soft: #22314f;--line: rgba(195, 203, 230, .17);--ink: #f6f8ff;--muted: #c3cbe6;--blue: #8eaaf0;--blue-soft: #223558;--red: #ff6b70;--orange: #ffc29d;--green: #74dfbf}html,body{font-family:Urbanist,sans-serif;font-weight:500}body,#root{min-height:100dvh}#root{display:flow-root}button,input,textarea,select{font-family:inherit}h1,h2,h3,h4,strong,.primary,.secondary,.toggle-label,.text-button,button,.field,.mode-button,.hint-button,.score,.questions-button{font-weight:700}.app-header{height:80px;background:var(--surface);border-bottom:1px solid var(--line);grid-template-columns:minmax(0,1fr) auto minmax(0,1fr)}.mode-area{display:flex;gap:20px;align-items:center}.brand-home{display:flex;align-items:center;padding:0;flex-shrink:0}.brand-home img{display:block;width:auto;height:48px}[data-theme=dark] .brand-home{background:#fff;border-radius:8px;padding:3px 7px}.header-divider{width:1px;height:30px;background:var(--line)}.mode-button,.icon-button{color:var(--blue)}.mode-label{display:flex;align-items:center;gap:9px;font-size:16px;font-weight:700;color:var(--blue);white-space:nowrap}.deck-heading{grid-column:2;font-weight:700}.header-actions{grid-column:3}.local-label{font-size:15px;color:var(--muted)}.questions-button{background:transparent;color:var(--ink);text-decoration:underline;text-decoration-color:var(--blue);text-decoration-thickness:2px;text-underline-offset:5px;border-radius:0}.questions-button:hover{background:transparent;color:var(--blue)}.top-progress span{background:var(--blue)}.study-main{margin-top:32px}.flashcard{height:clamp(370px,calc(100dvh - 272px),646px)}.results,.card-face{border:1px solid var(--line)}.card-top{left:26px;right:24px}.card-word{font-size:36px;font-weight:500}.card-content{inset:70px 44px 68px}.card-language{position:absolute;bottom:22px;left:20px;right:20px;text-align:center;font-size:13px;color:var(--muted);pointer-events:none}.hint-button{font-size:15px;color:var(--muted)}.hint-bubble{border-color:var(--line);box-shadow:none}.grade-button{border-radius:999px;border:1px solid var(--line);background:var(--surface)}.grade-button:hover:not(:disabled){background:var(--soft)}.learning-button:hover:not(:disabled),.know-button:hover:not(:disabled){background:var(--surface);border-color:currentColor}.right-controls .icon-button:last-child{background:transparent}.secondary-toolbar{color:var(--muted);font-size:13px}.secondary-toolbar>div:first-child>span{font-size:13px}.switch{background:#bcc7df}.switch:after{background:#8395bd}.toggle-row input:checked+.switch{background:#aebfe7}.primary,.danger-button{border-radius:999px;background:var(--red);min-height:48px;padding:12px 25px;font-size:16px;color:#fff}.primary:hover:not(:disabled),.danger-button:hover:not(:disabled){background:var(--ink);color:var(--surface)}.secondary{border:none;background:transparent;border-radius:0;color:var(--ink);text-decoration:underline;text-decoration-color:var(--blue);text-decoration-thickness:2px;text-underline-offset:5px}.secondary:hover:not(:disabled){background:transparent;color:var(--blue)}.text-button{color:var(--ink);text-decoration:underline;text-decoration-color:var(--blue);text-decoration-thickness:2px;text-underline-offset:5px}.text-button:hover:not(:disabled){color:var(--blue)}.text-button.danger-text{color:var(--red);text-decoration-color:var(--red)}.primary>svg:last-child:not(:first-child),.secondary>svg:last-child:not(:first-child){display:none}.dialog{border-radius:24px}.dialog-header h2{font-weight:700}.field{font-weight:700;font-size:14px}input,select,textarea{font-weight:500;border-color:var(--line);border-radius:14px;font-size:16px}.segmented button,.segmented{border-radius:999px}.segmented button[aria-pressed=true]{box-shadow:none}.settings-section{color:var(--muted);font-size:13px;font-weight:700}.result-icon{background:var(--blue-soft);color:var(--blue)}.results h1,.result-tallies strong{font-weight:700}.result-tallies span{color:var(--muted)}.mode-menu,.toast{border-radius:14px}.toast{background:#0e1628;color:#fff}.export-option{border-radius:24px}html:has(.course-library),body:has(.course-library){background-color:var(--surface);background-image:radial-gradient(ellipse at 6% 0%,rgba(15,63,166,.05),transparent 55%),radial-gradient(ellipse at 94% 12%,rgba(216,35,42,.04),transparent 50%)}[data-theme=dark]:has(.course-library),[data-theme=dark] body:has(.course-library){background-color:var(--bg)}.course-library{max-width:1140px;padding:0;margin:64px auto 40px}.course-library .library-intro{margin-bottom:40px;align-items:center}.course-library .library-intro h1{font-size:64px;line-height:1.04;letter-spacing:-1.7px;margin:0 0 24px;font-weight:700}.course-library .library-intro h1 span{color:var(--blue)}.course-library .library-intro>div:first-child>p{font-size:18px;line-height:1.5;max-width:470px;color:var(--muted);margin:0}.library-welcome{padding:0 0 0 35px;text-align:right;flex-shrink:0}.library-welcome p{font-size:17px;line-height:1.65;color:var(--muted);margin:0}.library-welcome strong{color:var(--ink);font-size:15px}.continue-strip{display:flex;justify-content:space-between;align-items:center;gap:20px;background:var(--blue-soft);padding:20px 28px;border-radius:14px;margin-bottom:48px}.continue-strip>div{display:flex;gap:20px;align-items:center;min-width:0}.continue-label{font-size:13px;color:var(--blue);font-weight:700;white-space:nowrap}.continue-strip strong{font-size:17px}.continue-strip>div>span:last-child{font-size:13px;color:var(--muted)}.continue-strip>.text-button{white-space:nowrap}.library-browse-top{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px}.library-browse-top h2{font-size:28px;margin:0;font-weight:700}.level-tabs{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:12px}.level-tabs>button{display:flex;flex-direction:column;gap:6px;text-align:left;border:1px solid var(--line);padding:18px 16px;border-radius:14px;background:var(--surface);min-width:0}.level-tabs>button>span{font-size:22px;color:var(--blue);font-weight:700;line-height:1.3;display:flex;align-items:center;min-height:29px}.level-tabs strong{font-size:14px;line-height:1.35;white-space:nowrap}.level-tabs small{font-size:13px;color:var(--muted);font-weight:500}.level-tabs>button[aria-selected=true]{background:var(--blue);color:#fff;border-color:var(--blue)}.level-tabs>button[aria-selected=true]>span,.level-tabs>button[aria-selected=true] small{color:#fff}.level-tabs>button:hover:not([aria-selected=true]){background:var(--blue-soft)}.library-filters{display:flex;justify-content:space-between;align-items:center;gap:20px;margin:30px 0 28px}.library-filters .search-box{flex:1;max-width:500px;margin:0;background:var(--surface);border-radius:999px;padding:0 18px;border-color:var(--line)}.library-filters .search-box input{border-radius:999px;font-size:16px;padding:13px 0}.progress-filter{display:flex;align-items:center;gap:12px;font-size:14px;white-space:nowrap}.progress-filter select{border-radius:999px;padding:11px 35px 11px 16px;font-size:14px;min-width:164px}.library-results-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:0 0 20px}.library-results-heading h3{margin:0;font-size:20px;font-weight:700}.library-results-heading>span{font-size:14px;color:var(--muted)}.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.topic-card{border:1px solid var(--line);border-radius:24px;padding:20px 24px 22px;background:var(--surface);display:flex;flex-direction:column;min-width:0}.topic-card-top{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--muted)}.level-badge{border-radius:999px;padding:5px 10px;font-weight:700;color:var(--blue);background:var(--blue-soft)}.topic-card-top .icon-button{margin-left:auto;width:30px;height:30px}.topic-card-top .icon-button svg{width:18px;height:18px}.topic-title{text-align:left;padding:0;margin-top:22px}.topic-title h4{font-size:22px;font-weight:700;line-height:1.25;letter-spacing:-.3px;margin:0 0 8px}.topic-title p{font-size:14px;font-weight:500;color:var(--blue);line-height:1.5;margin:0}.topic-title:hover h4{color:var(--blue)}.topic-preview{margin:18px 0 24px;font-size:14px;line-height:1.6;color:var(--muted);flex:1;overflow-wrap:anywhere}.topic-progress{height:3px;background:var(--blue-soft);border-radius:999px;overflow:hidden}.topic-progress>span{display:block;height:100%;background:var(--blue);transform-origin:left}.topic-card-bottom{display:flex;align-items:center;justify-content:space-between;gap:10px;padding-top:16px}.topic-card-bottom>span{font-size:13px;color:var(--muted)}.topic-study{font-size:15px;font-weight:700;color:var(--ink);text-decoration:underline;text-decoration-color:var(--blue);text-decoration-thickness:2px;text-underline-offset:5px;padding:5px 0 7px}.topic-study:hover{color:var(--blue)}.load-more{display:flex;align-items:center;flex-direction:column;gap:12px;margin:36px 0 10px}.load-more>span{font-size:13px;color:var(--muted)}.course-library .library-footer{font-size:13px;font-weight:500;margin:48px 0 0}@media(max-width:1240px){.course-library{margin-left:40px;margin-right:40px}.level-tabs{gap:9px}.level-tabs>button{padding:16px 12px}.level-tabs strong{font-size:13px}}@media(max-width:980px){.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.level-tabs{display:flex;overflow-x:auto;padding:3px 3px 12px;margin:0 -3px;scrollbar-width:thin}.level-tabs>button{min-width:138px}.course-library .library-intro h1{font-size:54px}.mode-area{gap:12px}.brand-home img{height:40px}.mode-button{font-size:14px}.questions-button{padding:10px}.card-word{font-size:32px}}@media(max-width:800px){.app-header{height:76px}.header-divider{display:none}.brand-home img{height:36px}.study-main{margin-top:26px}.flashcard{height:clamp(370px,calc(100dvh - 266px),620px)}.card-content{inset:65px 28px 60px}.questions-button{text-decoration:none}.continue-strip>div{flex-wrap:wrap;gap:6px 16px}.continue-strip>div>span:last-child{display:none}.library-welcome{padding-left:12px;padding-right:0}.library-welcome p{font-size:15px}}@media(max-width:600px){.course-library{margin:38px 20px 28px;padding:0}.course-library .library-intro{display:block;margin-bottom:32px}.course-library .library-intro h1{font-size:40px;letter-spacing:-.8px;margin-bottom:20px;line-height:1.08}.course-library .library-intro>div:first-child>p{font-size:16px;line-height:1.55}.library-welcome{display:flex;padding:0;align-items:center;justify-content:space-between;gap:16px;margin-top:24px;text-align:left}.library-welcome p{font-size:13px;text-align:left;margin:0}.library-welcome strong{font-size:13px}.continue-strip{margin-bottom:32px;padding:17px 18px}.continue-strip>div{display:block}.continue-strip strong{display:block;font-size:16px;margin-top:5px}.continue-strip .text-button{font-size:13px}.library-browse-top{margin-bottom:20px}.library-browse-top h2{font-size:25px}.library-browse-top>button{font-size:13px}.level-tabs>button{min-width:132px;padding:15px}.level-tabs strong{font-size:13px}.library-filters{flex-direction:column;align-items:stretch;gap:16px;margin:22px 0 26px}.library-filters .search-box{max-width:none}.progress-filter{justify-content:space-between;font-size:13px}.progress-filter select{min-width:170px;width:auto}.library-results-heading{align-items:flex-start}.library-results-heading h3{font-size:19px}.library-results-heading>span{font-size:13px;text-align:right}.topic-grid{grid-template-columns:1fr;gap:16px}.topic-card{padding:19px 22px 22px}.topic-title{margin-top:18px}.topic-title h4{font-size:23px}.topic-preview{margin-bottom:20px}.load-more{margin-top:26px}.course-library .library-footer{margin-top:34px;text-align:left}}@media(max-width:560px){.app-header{grid-template-columns:auto minmax(0,1fr) auto;padding:0 12px}.mode-area{gap:6px}.brand-home img{height:26px}.mode-button{gap:3px}.mode-button>svg:first-child{display:none}.deck-heading{max-width:100%;min-width:0;font-size:13px}.local-label{max-width:140px;font-size:13px}.mode-label{display:none}.app-header[data-screen=library] .brand-home img{height:40px}.study-main{margin-top:22px}.flashcard{height:clamp(350px,calc(100dvh - 270px),630px);border-radius:24px}.card-top{left:12px;right:10px}.card-content{inset:65px 25px 55px}.card-word{font-size:30px}.card-content.with-image .card-word{font-size:25px}.card-language{bottom:18px;font-size:13px}.hint-button{font-size:13px}.primary,.danger-button{min-height:46px;padding:12px 21px;font-size:15px}.dialog-footer .primary,.dialog-footer .secondary{font-size:14px}.secondary-toolbar,.secondary-toolbar>div:first-child>span{font-size:13px}.flip-guidance{font-size:12px}.grade-button{height:44px}.result-actions .primary,.result-actions .secondary{font-size:14px;white-space:normal}.results .result-tallies span{font-size:13px}}