:root{--bg: #0f0e0b;--surface: #1a1914;--card: #211f18;--border: #2e2c22;--accent: #e8c84a;--accent-hover: #f0d55a;--accent2: #c4523a;--text: #f0ead6;--muted: #7a7460;--correct: #5a9e6f;--wrong: #c4523a;--hover-bg: #1e1c14;--selected-bg: #221f10}[data-theme=light]{--bg: #f9f8f6;--surface: #f0eee5;--card: #ffffff;--border: #e0dccc;--accent: #d4a017;--accent-hover: #b88a10;--accent2: #c4523a;--text: #2c2a25;--muted: #857e67;--correct: #3b8253;--wrong: #c4523a;--hover-bg: #ffffff;--selected-bg: #fcf4db}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:DM Sans,sans-serif;min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:40px 20px 80px}#root{width:100%;display:flex;flex-direction:column;align-items:center;flex:1}body:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");pointer-events:none;z-index:999;opacity:.4}header{text-align:center;margin-bottom:48px;animation:fadeDown .7s ease both}.eyebrow{font-family:DM Mono,monospace;font-size:11px;letter-spacing:.25em;text-transform:uppercase;color:var(--accent);margin-bottom:10px}h1{font-family:Playfair Display,serif;font-size:clamp(2.4rem,5vw,3.8rem);font-weight:700;line-height:1;color:var(--text)}h1 em{color:var(--accent);font-style:italic}.subtitle{margin-top:12px;color:var(--muted);font-size:.9rem;font-weight:300}.import-split{width:100%;max-width:960px;flex:1;min-height:0;display:grid;grid-template-columns:320px 1fr;gap:32px;animation:fadeDown .7s .1s ease both}.panel-local{display:flex;flex-direction:column}.panel-local .drop-area{flex:1;display:flex;flex-direction:column;justify-content:center;align-items:center;border:2px dashed var(--border);background:transparent;border-radius:12px;cursor:pointer;transition:all .2s;min-height:300px;position:relative}.panel-local .drop-area:hover,.panel-local .drop-area.dragover{border-color:var(--accent);background:var(--hover-bg)}.drop-icon{font-size:2.2rem;margin-bottom:12px;display:block}.drop-label{font-size:.95rem;color:var(--muted);text-align:center;padding:0 20px}.drop-label strong{color:var(--accent);font-weight:500}.file-name{margin-top:12px;font-family:DM Mono,monospace;font-size:.78rem;color:var(--accent2);display:none}#fileInput{position:absolute;top:0;right:0;bottom:0;left:0;opacity:0;cursor:pointer;width:100%;height:100%}.panel-server{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:28px;display:flex;flex-direction:column;min-height:0}.panel-server h3{font-family:DM Sans,sans-serif;font-weight:500;font-size:1.1rem;margin-bottom:20px;display:flex;align-items:center}.panel-server .sets-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px;overflow-y:auto;padding:4px 6px 4px 2px;margin-top:-4px;flex:1;align-content:start}.live-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--correct);margin-left:8px;opacity:0;transition:opacity .3s}.live-dot.server-ok{opacity:1}.set-card{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:14px 16px;cursor:pointer;transition:border-color .2s,background .2s,transform .15s}.set-card:hover{border-color:var(--accent);background:var(--hover-bg);transform:translateY(-1px)}.set-card.selected{border-color:var(--accent);background:var(--selected-bg)}.set-card-name{font-family:DM Mono,monospace;font-size:.78rem;color:var(--text);margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.set-card-meta{font-size:.72rem;color:var(--muted);text-align:justify}.sets-msg{text-align:center;color:var(--muted);font-size:.83rem;padding:22px 0;line-height:1.7}.sets-msg code{font-family:DM Mono,monospace;color:var(--accent2);font-size:.78rem}.sets-msg.loading{font-family:DM Mono,monospace;letter-spacing:.05em;animation:pulse 1.2s ease infinite}.btn-load{display:none;margin:18px auto 0;padding:12px 32px;background:var(--accent);color:var(--bg);border:none;border-radius:6px;font-family:DM Mono,monospace;font-size:.82rem;letter-spacing:.1em;text-transform:uppercase;cursor:pointer;font-weight:500;transition:background .2s,transform .1s;width:100%}.btn-load.visible{display:block}.btn-load:hover{background:var(--accent-hover);transform:translateY(-1px)}.btn-load:active{transform:translateY(0)}#exercise-zone{width:100%;max-width:680px}.progress-header{display:flex;align-items:center;gap:16px;margin-bottom:36px}.progress-bar-wrap{background:var(--border);border-radius:4px;height:4px;flex:1;overflow:hidden}.progress-bar{height:100%;background:var(--accent);border-radius:4px;transition:width .5s cubic-bezier(.4,0,.2,1)}.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:36px 40px;animation:slideUp .4s ease both}.card-meta{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.tense-tag{font-family:DM Mono,monospace;font-size:10px;letter-spacing:.2em;text-transform:uppercase;background:var(--border);color:var(--accent);padding:4px 10px;border-radius:4px}.counter{font-family:DM Mono,monospace;font-size:11px;color:var(--muted)}.hint-block{margin-bottom:20px;padding:14px 18px;background:var(--surface);border-left:3px solid var(--accent);border-radius:0 8px 8px 0;font-size:.85rem;color:var(--muted)}.hint-block strong{color:var(--text);font-family:Playfair Display,serif;font-style:italic;font-size:1rem}.sentence{font-size:1.25rem;line-height:1.9;margin-bottom:28px;font-weight:300}.blank-input{display:inline-block;border:none;border-bottom:2px solid var(--accent);background:transparent;color:var(--text);font-family:DM Sans,sans-serif;font-size:1.15rem;width:140px;padding:2px 6px;outline:none;text-align:center;transition:border-color .2s,background .3s;border-radius:4px 4px 0 0}.blank-input::placeholder{color:var(--muted);opacity:.5}.blank-input:focus{border-bottom-color:var(--accent-hover)}.blank-input.correct{border-bottom-color:var(--correct);color:var(--correct);background:#5a9e6f12}.blank-input.wrong{border-bottom-color:var(--wrong);color:var(--wrong);background:#c4523a12;animation:shake .4s ease}.feedback{min-height:22px;margin-bottom:20px;font-size:.85rem}.feedback.correct{color:var(--correct)}.feedback.wrong{color:var(--wrong)}.card-actions{display:flex;gap:12px}.btn{padding:11px 24px;border-radius:6px;border:none;font-family:DM Mono,monospace;font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;cursor:pointer;transition:all .15s;font-weight:500}.btn-primary{background:var(--accent);color:var(--bg)}.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px)}.btn-secondary{background:transparent;color:var(--muted);border:1px solid var(--border)}.btn-secondary:hover{border-color:var(--muted);color:var(--text)}.results-card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:48px 40px;text-align:center}.results-title{font-family:Playfair Display,serif;font-size:2rem;margin-bottom:8px}.score-display{font-size:4rem;font-weight:700;font-family:DM Mono,monospace;color:var(--accent);margin:20px 0}.score-label{color:var(--muted);font-size:.85rem;margin-bottom:32px}.review-list{text-align:left;margin:24px 0 32px;display:flex;flex-direction:column;gap:10px}.review-item{background:var(--surface);border-radius:8px;padding:12px 16px;font-size:.85rem;display:flex;align-items:flex-start;gap:12px}.review-item .dot{width:8px;height:8px;border-radius:50%;margin-top:5px;flex-shrink:0}.review-item.ok .dot{background:var(--correct)}.review-item.ko .dot{background:var(--wrong)}.review-item .answer{font-family:DM Mono,monospace;font-size:.78rem;color:var(--muted);margin-top:3px}.review-item .answer span{color:var(--accent2)}.csv-info{width:100%;max-width:680px;margin-top:48px;padding:28px 32px;background:var(--surface);border:1px solid var(--border);border-radius:12px;animation:fadeDown .7s .2s ease both}.csv-info h3{font-family:Playfair Display,serif;font-size:1.1rem;margin-bottom:14px}.csv-info p{font-size:.82rem;color:var(--muted);margin-bottom:12px;line-height:1.6}pre{background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:16px;font-family:DM Mono,monospace;font-size:.72rem;color:var(--accent);overflow-x:auto;line-height:1.7}.btn-download-csv{margin-top:16px;display:inline-block;padding:9px 20px;background:transparent;border:1px solid var(--accent);color:var(--accent);border-radius:6px;font-family:DM Mono,monospace;font-size:.75rem;letter-spacing:.1em;text-transform:uppercase;cursor:pointer;transition:all .15s;font-weight:500}.btn-download-csv:hover{background:var(--accent);color:var(--bg)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:2000;animation:fadeIn .25s ease}.modal-content.csv-info{margin-top:0;position:relative;max-width:90vw;width:680px;animation:scaleIn .2s ease}.close-modal{position:absolute;top:16px;right:18px;background:none;border:none;font-size:1.6rem;color:var(--muted);cursor:pointer;transition:color .2s;line-height:1}.close-modal:hover{color:var(--accent)}@keyframes fadeDown{0%{opacity:0;transform:translateY(-16px)}to{opacity:1;transform:translateY(0)}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes scaleIn{0%{transform:scale(.95);opacity:0}to{transform:scale(1);opacity:1}}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-6px)}40%{transform:translate(6px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}@keyframes pulse{0%,to{opacity:.45}50%{opacity:1}}.top-controls{position:absolute;top:20px;right:20px;display:flex;align-items:center;gap:12px;z-index:1000}.top-controls-end{display:flex;gap:12px}#btnQuitMobile{display:none}.icon-toggle{background:var(--surface);border:1px solid var(--border);border-radius:50%;width:44px;height:44px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1.2rem;color:var(--text);transition:all .2s}.icon-toggle:hover{background:var(--hover-bg);border-color:var(--accent);transform:scale(1.05)}#infoToggle{font-family:DM Mono,monospace;font-weight:500;font-size:1.4rem}.theme-toggle .icon-moon,[data-theme=light] .theme-toggle .icon-sun{display:none}[data-theme=light] .theme-toggle .icon-moon{display:block}@media(max-width:768px){body{height:auto;min-height:100vh;overflow-y:auto;padding:76px 16px 32px;align-items:stretch}.top-controls{position:fixed;top:0;left:0;right:0;width:100%;padding:0 16px;height:56px;background:var(--bg);border-bottom:1px solid var(--border);justify-content:space-between;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}#btnQuitMobile{display:flex;visibility:hidden;font-size:1rem}body.exercise-active #btnQuitMobile{visibility:visible}.icon-toggle{width:48px;height:48px;font-size:1.1rem}.eyebrow,.subtitle{display:none}header{margin-bottom:24px}h1{font-size:2rem}.import-split{grid-template-columns:1fr;gap:16px;flex:unset}.panel-local .drop-area{min-height:140px}.panel-server{min-height:240px}.panel-server .sets-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}body.exercise-active{overflow:hidden;height:100vh;padding:0}body.exercise-active header{padding-top:56px;margin-bottom:0;flex-shrink:0}body.exercise-active #root{height:100%}body.exercise-active #exercise-zone{display:flex;flex:1;flex-direction:column}body.exercise-active .progress-header{flex-shrink:0;padding:14px 20px 12px;margin-bottom:0;gap:12px}body.exercise-active #exerciseCard{flex:1;display:flex;flex-direction:column;overflow-y:auto;border-radius:0;border-left:none;border-right:none;border-top:none;padding:20px 20px 0}body.exercise-active .card-meta,body.exercise-active .hint-block{flex-shrink:0}body.exercise-active .sentence-container{flex-wrap:wrap;position:sticky;margin-bottom:0}body.exercise-active .feedback{flex-shrink:0;text-align:center}body.exercise-active .card-meta{margin-bottom:16px}body.exercise-active #btnQuitDesktop{display:none}body.exercise-active .sentence{font-size:1.1rem;line-height:1.8}body.exercise-active .card-actions{display:flex;bottom:0;padding:14px 20px max(16px,env(safe-area-inset-bottom));margin:0 -20px;background:var(--card);border-top:1px solid var(--border)}body.exercise-active #resultsCard{flex:1;overflow-y:auto;border-radius:0;border-left:none;border-right:none;border-top:none;padding:24px 20px;text-align:center}}@media(max-width:480px){body{padding-top:72px}.panel-local .drop-area{min-height:110px;padding:20px}.drop-icon{font-size:1.5rem;margin-bottom:6px}.drop-label{font-size:.83rem}.panel-server{padding:18px 16px;min-height:200px}.panel-server .sets-grid{grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:8px}.set-card{padding:10px 12px}body.exercise-active #exerciseCard{padding:16px 16px 0}body.exercise-active .card-actions{padding:12px 16px max(14px,env(safe-area-inset-bottom));margin:0 -16px;gap:8px}body.exercise-active .card-actions .btn{flex:1;padding:11px 8px;font-size:.72rem}.blank-input{width:110px;font-size:1rem}body.exercise-active #resultsCard{padding:20px 16px}.score-display{font-size:2.8rem}.results-title{font-size:1.6rem}.btn-load{padding:10px 24px;font-size:.78rem}}.mobile-exercise-zone{display:flex!important;flex-direction:column;flex:1;padding:16px;width:100%}.mobile-progress{padding:10px 0;margin-bottom:12px}.mobile-card{flex:1;display:flex;flex-direction:column;justify-content:space-between;padding:24px 20px;border-radius:12px}.card-top-info{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.mobile-hint{font-size:1rem}.mobile-sentence{flex:1;display:flex;flex-direction:column;justify-content:center}.mobile-input{max-width:120px}.mobile-feedback{text-align:center;margin-top:16px}.mobile-actions{display:flex;flex-direction:column;gap:12px;margin-top:24px}.btn-block{width:100%;padding:16px;font-size:.9rem}.mobile-results-card{padding:32px 20px}.mobile-home{display:flex;flex-direction:column;flex:1;width:100%;gap:16px;animation:fadeDown .7s .1s ease both}.mobile-home-import{flex-shrink:0}.mobile-drop-area{min-height:100px!important;padding:16px}.mobile-import-actions{display:flex;flex-direction:column;gap:8px;margin-top:12px}.mobile-home-sets{flex:1;display:flex;flex-direction:column;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px 16px;min-height:0}.mobile-sets-header{font-family:DM Sans,sans-serif;font-weight:500;font-size:1rem;margin-bottom:14px;display:flex;align-items:center;flex-shrink:0}.mobile-sets-scroll{flex:1;overflow-y:auto;min-height:0;-webkit-overflow-scrolling:touch}.mobile-sets-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr))!important;gap:10px!important;align-content:start}.mobile-sets-start{flex-shrink:0;margin-top:12px}