.assignment-container{max-width:800px;margin:20px auto;padding:0 20px}.question-card{background:var(--card);border-radius:16px;margin-bottom:24px;padding:24px;box-shadow:0 8px 26px #00000014}.question-number{color:var(--accent2);margin-bottom:8px;font-size:14px;font-weight:700}.question-text{white-space:pre-line;word-wrap:break-word;overflow-wrap:break-word;margin-bottom:16px;font-size:18px;font-weight:600;line-height:1.5}.question-image{cursor:pointer;border-radius:12px;max-width:100%;max-height:300px;margin:16px 0;transition:transform .2s;display:block}.question-image:hover{transform:scale(1.02)}.options-container{flex-direction:column;gap:12px;margin:20px 0;display:flex}.option-label{background:var(--bg1);cursor:pointer;border:2px solid #0000;border-radius:12px;align-items:center;padding:16px;transition:all .2s;display:flex}.option-label:hover{background:#4ecdc41a}.option-label.selected{border-color:var(--accent2);background:#4ecdc426}.option-radio{margin-right:12px}.fill-inputs-container{flex-direction:column;gap:12px;margin:20px 0;display:flex}.fill-input-item{background:#fff;border:1px solid #e0e0e0;border-radius:8px;align-items:center;gap:10px;padding:12px;display:flex}.fill-input-number{background:var(--accent2);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:14px;font-weight:700;display:flex}.fill-input-item input{border:2px solid #0000001a;border-radius:8px;flex:1;padding:10px 12px;font-size:16px}.fill-input-item input:focus{border-color:var(--accent2);outline:none}.fill-input-count{color:#666;text-align:center;margin-top:5px;font-size:12px}.sentence-container{background:var(--bg1);border-radius:12px;margin:20px 0;padding:20px}.sentence-container--cloze{background:#fff;border:1px solid #e2e8f0;padding:20px 22px}.sentence-cloze{color:#1e293b;font-size:17px;line-height:1.75}.sentence-cloze-paragraph{margin:0 0 .85em;line-height:1.85}.sentence-cloze-paragraph:last-child{margin-bottom:0}.sentence-cloze-spacer{height:.5em}.sentence-cloze-text{display:inline}.sentence-gap{white-space:nowrap;vertical-align:baseline;margin:0 2px;display:inline}.sentence-gap-num{color:#64748b;vertical-align:super;margin-right:1px;font-size:10px;font-weight:700;line-height:1;display:inline-block}.sentence-gap-num:before{content:"["}.sentence-gap-num:after{content:"]"}.sentence-gap-input{width:auto;min-width:3ch;max-width:min(100%,14em);font-size:inherit;vertical-align:baseline;box-sizing:content-box;background:#f8fafce6;border:none;border-bottom:2px solid #cbd5e1;border-radius:0;margin:0;padding:2px 4px 3px;font-family:inherit;font-weight:600;line-height:1.4;display:inline-block}.sentence-gap-input:focus{border-bottom-color:var(--accent2,#4ecdc4);background:#fff;outline:none}.sentence-gap-input.is-correct{color:#166534;background:#dcfce78c;border-bottom-color:#22c55e}.sentence-gap-input.is-incorrect{color:#991b1b;background:#fee2e28c;border-bottom-color:#ef4444}.sentence-empty-error{color:#991b1b;background:#fef2f2;border:1px solid #fecaca;border-radius:12px;padding:16px;font-weight:600}.sentence-text{white-space:pre-line;background:#fff;border:1px solid #e0e0e0;border-radius:8px;margin-bottom:20px;padding:15px;font-size:18px;line-height:1.6}.sentence-input{text-align:center;border:2px solid #ddd;border-radius:6px;width:100%;padding:8px 12px;font-size:16px}.sentence-input:focus{border-color:var(--accent2);outline:none}.question-rich-text,.rich-text-normal{white-space:pre-wrap;word-break:break-word;font-weight:400}.question-rich-text strong,.rich-text-bold{font-weight:800}.question-title .question-rich-text{display:inline}.complex-question-title,.complex-subquestion-title,.reading-subquestion-title,.review-question-title{font-weight:400;line-height:1.5}.complex-question-title{margin-bottom:8px;font-size:17px}.complex-subquestion-title{font-size:16px;line-height:1.45}.reading-subquestion-title{flex:1;font-size:16px;line-height:1.45}.review-question-title{font-size:16px;line-height:1.45}.complex-question-title strong,.complex-subquestion-title strong,.reading-subquestion-title strong,.review-question-title strong{font-weight:800}.review-sentence-cloze{margin-top:8px}.review-sentence-chip{white-space:nowrap;vertical-align:baseline;border-radius:8px;margin:0 2px;padding:1px 8px 2px;font-weight:700;display:inline}.review-sentence-chip.is-correct{color:#166534;background:#dcfce7;border:1px solid #22c55e}.review-sentence-chip.is-incorrect{color:#991b1b;background:#fee2e2;border:1px solid #ef4444}.navigation{border-top:1px solid var(--bg1);justify-content:space-between;align-items:center;margin-top:30px;padding-top:20px;display:flex}.question-counter{text-align:center;color:var(--project-text,#111827);margin:15px 0;font-size:16px;font-weight:700}.loading{text-align:center;padding:60px 20px}.spinner{border:4px solid #f3f3f3;border-top:4px solid var(--accent2);border-radius:50%;width:40px;height:40px;margin:0 auto 20px;animation:2s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.error-message{color:#c62828;text-align:center;background:#ffebee;border-radius:12px;margin:20px 0;padding:20px}.completion-message{text-align:center;padding:40px 20px}.score-display{color:var(--accent2);margin:20px 0;font-size:48px;font-weight:700}.btn-finish{background:var(--accent2);color:#fff;cursor:pointer;border:none;border-radius:12px;padding:16px 32px;font-size:18px;font-weight:600}.completion-details{background:var(--bg1);text-align:left;border-radius:12px;margin:20px 0;padding:20px}.completion-details h3{color:var(--accent2);text-align:center;margin-bottom:15px}.result-item{border-bottom:1px solid #e0e0e0;justify-content:space-between;padding:8px 0;display:flex}.result-item:last-child{border-bottom:none}.previous-result{text-align:center;border-left:4px solid var(--accent2);background:#e3f2fd;border-radius:12px;margin:15px 0;padding:15px}.restart-container{text-align:center;background:#fff3e0;border:2px solid #ff9800;border-radius:12px;margin:20px 0;padding:20px}.restart-btn{color:#fff;cursor:pointer;background:#ff9800;border:none;border-radius:8px;margin:0 10px;padding:12px 24px;font-size:16px;font-weight:600}.restart-btn:hover{background:#f57c00}.view-mode-notice{text-align:center;background:#e8f5e8;border:1px solid #c8e6c9;border-radius:8px;margin:15px 0;padding:15px}.header-buttons{align-items:center;gap:10px;display:flex}.mode-switch-btn{color:#fff;cursor:pointer;background:#6c757d;border:none;border-radius:6px;padding:8px 16px;font-size:14px}.mode-switch-btn:hover{background:#5a6268}.image-modal{z-index:1000;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);cursor:grab;background-color:#000000e6;width:100%;height:100%;display:none;position:fixed;top:0;left:0}.image-modal:active{cursor:grabbing}.image-modal-content{max-width:95%;max-height:95%;cursor:inherit;border-radius:8px;transition:transform .1s;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);box-shadow:0 0 30px #00000080}.image-modal-close{color:#fff;cursor:pointer;z-index:1001;background:#00000080;border-radius:50%;justify-content:center;align-items:center;width:50px;height:50px;font-size:40px;font-weight:700;transition:background .3s;display:flex;position:absolute;top:20px;right:35px}.image-modal-close:hover{background:#000c}.image-modal-controls{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:1001;background:#000000b3;border-radius:25px;gap:15px;padding:15px;display:flex;position:absolute;bottom:30px;left:50%;transform:translate(-50%)}.image-modal-btn{color:#fff;cursor:pointer;background:#fff3;border:none;border-radius:50%;justify-content:center;align-items:center;width:50px;height:50px;font-size:20px;transition:all .3s;display:flex}.image-modal-btn:hover{background:#ffffff4d;transform:scale(1.1)}.image-modal-zoom-info{color:#fff;background:#00000080;border-radius:20px;align-items:center;padding:0 15px;font-size:16px;display:flex}.image-modal-hint{color:#fff;text-align:center;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:1001;background:#000000b3;border-radius:20px;padding:10px 20px;font-size:14px;position:absolute;bottom:100px;left:50%;transform:translate(-50%)}.crossword-container{text-align:center;margin:18px 0;padding:0}.cw-card{background:#fff;border:1px solid #00000014;border-radius:14px;margin:14px 0;padding:14px;box-shadow:0 6px 18px #0000000f}.cw-image-card{flex-direction:column;justify-content:center;align-items:center;display:flex}.cw-image{object-fit:contain;cursor:pointer;border-radius:12px;width:min(560px,100%);max-height:420px;transition:transform .18s,box-shadow .18s;box-shadow:0 10px 25px #0000001a}.cw-image:hover{transform:scale(1.01);box-shadow:0 14px 30px #0000001f}.cw-image-hint{color:#6b7280;margin-top:10px;font-size:13px}.cw-grid-wrap{-webkit-overflow-scrolling:touch;overscroll-behavior-x:contain;text-align:center;width:100%;max-width:100%;padding:6px 4px 12px;scroll-padding-inline:8px;overflow:auto visible}.cw-grid-wrap .cw-grid{text-align:left;vertical-align:top}.cw-scroll-hint{color:#0f766e;text-align:center;background:#4ecdc41f;border:1px solid #4ecdc440;border-radius:10px;margin:0 0 8px;padding:8px 12px;font-size:12px;font-weight:700;display:none}.cw-grid-wrap.is-scrollable+.cw-scroll-hint,.cw-grid-wrap.is-scrollable .cw-scroll-hint-inline{display:block}.cw-grid{--cw-cell:36px;--cw-gap:6px;background:linear-gradient(#4ecdc41a,#4ecdc40f);border:1px solid #4ecdc438;border-radius:16px;padding:12px;display:inline-block}.cw-grid.size-large{--cw-cell:26px;--cw-gap:4px}.cw-grid.size-medium{--cw-cell:30px;--cw-gap:5px}.cw-grid.size-normal{--cw-cell:36px;--cw-gap:6px}.cw-grid.size-small{--cw-cell:42px;--cw-gap:6px}.cw-row{gap:var(--cw-gap);margin-bottom:var(--cw-gap);display:flex}.cw-row:last-child{margin-bottom:0}.cw-cell{width:var(--cw-cell);height:var(--cw-cell);box-sizing:border-box;-webkit-user-select:none;user-select:none;border-radius:8px;justify-content:center;align-items:center;transition:transform .1s,box-shadow .1s;display:flex;position:relative;overflow:hidden;box-shadow:inset 0 2px #ffffff8c,inset 0 -2px #0000000f,0 2px 10px #0000000f}.cw-cell.active{background:#fff;border:3px solid #111}.cw-cell.empty{background:linear-gradient(#ffe5e5,#ffd6d6);border:2px solid #be123c59;box-shadow:inset 0 2px #ffffff8c,inset 0 -2px #00000008}.cw-cell.blocked{background:linear-gradient(#2b2f36,#171a1f);border:2px solid #00000073;box-shadow:inset 0 2px #ffffff14}.cw-cell.active:hover{transform:translateY(-1px);box-shadow:inset 0 2px #ffffff8c,inset 0 -2px #0000000f,0 6px 16px #0000001a}.cw-cell input{text-align:center;text-transform:uppercase;color:#0f172a;width:100%;height:100%;caret-color:var(--accent2);background:0 0;border:none;outline:none;padding:0;font-family:inherit;font-weight:900;line-height:1}.cw-grid.size-large .cw-cell input{font-size:12px}.cw-grid.size-medium .cw-cell input{font-size:13px}.cw-grid.size-normal .cw-cell input{font-size:14px}.cw-grid.size-small .cw-cell input{font-size:16px}.cw-num{z-index:3;color:#111;pointer-events:none;font-weight:800;line-height:1;position:absolute;top:3px;left:4px;transform:translateZ(0)}.cw-grid.size-large .cw-num{font-size:9px;top:2px;left:3px}.cw-grid.size-medium .cw-num{font-size:10px;top:2px;left:3px}.cw-grid.size-normal .cw-num{font-size:11px}.cw-grid.size-small .cw-num{font-size:12px}.cw-cell.focused{outline-offset:2px;outline:4px solid #4ecdc473}.cw-cell.cw-cell-correct{background:#f0fdf4!important;border-color:#10b981!important}.cw-cell.cw-cell-error{background:#fef2f2!important;border-color:#ef4444!important}.cw-cell.cw-cell-error>div{color:#ef4444!important}.cw-cell.cw-cell-correct>div{color:#059669!important}.cw-mode{color:#374151;margin-top:10px;font-size:13px}.crossword-review-box{text-align:left;background:#fff;border:1px solid #e9ecef;border-radius:12px;margin-top:14px;padding:14px}.crossword-review-head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:10px;display:flex}.crossword-review-title{color:#1f2937;font-weight:800}.crossword-review-stats{color:#6b7280;font-size:13px}.crossword-review-columns{grid-template-columns:1fr 1fr;gap:12px;display:grid}.crossword-review-col{background:#f8fafc;border:1px solid #e5e7eb;border-radius:12px;padding:10px}.crossword-review-col h5{color:#111827;margin:0 0 10px;font-weight:800}.crossword-word-row{background:#fff;border:1px solid #eef2f7;border-radius:12px;grid-template-columns:64px 1fr;gap:10px;margin-bottom:10px;padding:10px;display:grid}.crossword-word-badge{color:#0f766e;white-space:nowrap;background:#4ecdc426;border-radius:999px;justify-content:center;align-items:center;gap:6px;height:28px;padding:0 10px;font-size:12px;font-weight:800;display:inline-flex}.crossword-word-badge.bad{color:#b91c1c;background:#ef44441f}.crossword-word-lines{color:#111827;font-size:13px;line-height:1.35}.crossword-word-lines .muted{color:#6b7280}@media (max-width:768px){.assignment-container{padding:0 15px}.question-card{padding:16px}.question-text{font-size:16px}.cw-grid.size-large{--cw-cell:22px;--cw-gap:4px}.cw-grid.size-medium{--cw-cell:26px;--cw-gap:5px}.cw-grid.size-normal{--cw-cell:32px;--cw-gap:6px}.cw-grid.size-small{--cw-cell:38px;--cw-gap:6px}.cw-image{width:min(520px,100%);max-height:360px}.crossword-review-columns{grid-template-columns:1fr}}@media (max-width:480px){.cw-grid.size-large{--cw-cell:18px;--cw-gap:3px}.cw-grid.size-medium{--cw-cell:22px;--cw-gap:4px}.cw-grid.size-normal{--cw-cell:28px;--cw-gap:5px}.cw-grid.size-small{--cw-cell:34px;--cw-gap:5px}.cw-image{width:100%;max-height:320px}}.review-panel{text-align:left;margin-top:22px}.review-head{flex-direction:column;gap:6px;margin:10px 0 14px;display:flex}.review-title{color:#111827;margin:0;font-size:18px;font-weight:800}.review-subtitle{color:var(--project-text,#111827);font-size:14px;font-weight:600}.review-list{flex-direction:column;gap:14px;display:flex}.review-card{background:#fff;border:1px solid #1118271a;border-radius:16px;min-width:0;max-width:100%;overflow:visible;box-shadow:0 10px 26px #0000000f}.review-card-head{border-bottom:1px solid #11182714;justify-content:space-between;align-items:flex-start;gap:14px;padding:14px 14px 12px;display:flex}.review-qnum{color:var(--project-text,#374151);margin-bottom:4px;font-size:14px;font-weight:800}.review-qtext{color:var(--project-text,#111827);white-space:pre-line;font-size:15px;font-weight:750;line-height:1.35}.review-badges{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:8px;display:flex}.review-badge{white-space:nowrap;border:1px solid #1118271a;border-radius:999px;align-items:center;height:28px;padding:0 10px;font-size:12px;font-weight:800;display:inline-flex}.review-badge-points{color:#0f766e;background:#4ecdc41f}.review-badge-correct{color:#166534;background:#22c55e1f}.review-badge-incorrect{color:#991b1b;background:#ef44441f}.review-badge-partial{color:#92400e;background:#f59e0b24}.review-badge-skipped{color:#374151;background:#6b72801f}.review-correct{border-left:6px solid #22c55e8c}.review-incorrect{border-left:6px solid #ef44448c}.review-partial{border-left:6px solid #f59e0b99}.review-skipped{border-left:6px solid #6b72808c}.review-body{padding:14px}.review-block{gap:6px;display:grid}.review-label{color:var(--project-text,#374151);text-transform:uppercase;letter-spacing:.02em;font-size:14px;font-weight:800}.review-value{color:var(--project-text,#111827);white-space:pre-line;background:#f9fafb;border:1px solid #11182714;border-radius:12px;padding:10px 12px;font-size:14px;font-weight:650}.review-divider{background:#11182714;height:1px;margin:12px 0}.review-metrics{flex-wrap:wrap;gap:10px;margin-bottom:12px;display:flex}.review-metric{color:var(--project-text,#111827);background:#f9fafb;border:1px solid #11182714;border-radius:999px;padding:6px 10px;font-size:14px;font-weight:600}.review-grid{background:#fff;border:1px solid #11182714;border-radius:14px;overflow:hidden}.review-grid-head{color:var(--project-text,#374151);background:#f9fafb;border-bottom:1px solid #11182714;grid-template-columns:44px 1fr 1fr;gap:0;padding:10px 12px;font-size:14px;font-weight:850;display:grid}.review-grid-row{border-bottom:1px solid #1118270f;grid-template-columns:44px 1fr 1fr;align-items:center;gap:0;padding:10px 12px;display:grid}.review-grid-row:last-child{border-bottom:none}.review-part-idx{color:#111827;font-size:12px;font-weight:900}.review-part-user,.review-part-correct{color:var(--project-text,#111827);word-break:break-word;font-size:14px;font-weight:650}.review-grid-row.row-ok{background:#22c55e0f}.review-grid-row.row-bad{background:#ef44440f}@media (max-width:640px){.review-grid-head,.review-grid-row{grid-template-columns:36px 1fr}.review-grid-head>div:nth-child(3),.review-grid-row>div:nth-child(3){display:none}}.header .progress-bubble,.header .floating-progress,.header .corner-progress,.header .progress-indicator,.header .question-indicator,#progressBubble,#floatingProgress,#cornerProgress,#progressIndicator,#questionIndicator,.progress-bubble,.floating-progress,.corner-progress,.progress-indicator,.question-indicator{display:none!important}.imagemap-answer-card{cursor:default;color:#1e293b;text-align:center;background-color:#fff;border:2px solid #e2e8f0;border-radius:16px;min-width:100px;padding:8px 12px;font-weight:700;transition:transform .2s,box-shadow .2s;box-shadow:0 2px 8px #0000000d}.imagemap-answer-card:hover{transform:translateY(-2px);box-shadow:0 8px 20px #0000001a}.imagemap-answers{flex-wrap:wrap;justify-content:center;gap:16px;margin-top:24px;display:flex}.imagemap-renderer-point{cursor:default;text-shadow:0 1px 1px #0000004d;border-radius:50%;justify-content:center;align-items:center;font-weight:700;transition:transform .1s;display:flex;position:absolute;box-shadow:0 0 0 2px #0003,0 4px 12px #00000026}.imagemap-renderer-point:hover{transform:scale(1.2)}.imagemap-line{transition:stroke-width .2s}.imagemap-answer-card img{object-fit:contain;border-radius:8px;width:32px;height:32px;margin-right:8px}@media (max-width:640px){.imagemap-answer-card{min-width:70px;padding:6px 8px;font-size:12px}.imagemap-answer-card img{width:24px;height:24px}}.review-card input:disabled,.fill-input-item input:disabled,.sentence-container input:disabled,.cw-cell input:disabled{color:#000!important;opacity:1!important;-webkit-text-fill-color:#000!important;-webkit-opacity:1!important;font-weight:900!important}.cw-cell.active,.cw-cell.active input{color:#000!important;font-weight:900!important}.matching-card-static,.matching-card{color:#000!important}.matching-card-static div,.matching-card div{text-shadow:0 0 1px #0000001a}.text-correct-bold{color:#000!important;font-weight:900!important}.review-card input{cursor:default!important}.premium-header{padding:30px 20px}.header-content{justify-content:space-between;align-items:center;max-width:900px;margin:0 auto;display:flex}.back-button,.mode-switch-button{cursor:pointer;color:inherit;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffffb3;border:none;border-radius:16px;padding:12px 24px;font-weight:700;transition:all .2s;box-shadow:0 4px 15px #0000000d}.mode-switch-button{color:#6366f1;background:#0000000d}.back-button:hover,.mode-switch-button:hover{background:#fff;transform:translateY(-2px)}.assignment-badge{color:#fff;letter-spacing:1.5px;border-radius:12px;padding:8px 16px;font-size:11px;font-weight:900;box-shadow:0 4px 15px #0000001a}.skills-wordmark{letter-spacing:-.04em;color:var(--project-text,#0f172a);font-size:22px;font-weight:900;font-family:var(--font-sans),system-ui,-apple-system,sans-serif;-webkit-user-select:none;user-select:none;background:linear-gradient(135deg,var(--project-primary,#0ea5e9),var(--project-text,#0f172a));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;display:inline-block}.assignment-wordmark{font-size:clamp(20px,4vw,26px);line-height:1}.premium-main{max-width:850px;margin:0 auto;padding:0 20px 60px}.premium-card{border:1px solid #fffc;border-radius:40px;padding:40px;box-shadow:0 30px 60px #00000014}.card-title{text-align:center;margin-bottom:16px;font-size:32px;font-weight:800}.card-subtitle{text-align:center;color:var(--project-text,#111827);opacity:1;margin-bottom:40px;font-size:15px;font-weight:600;line-height:1.55}.progress-container{margin-bottom:30px}.progress-dots{scrollbar-width:none;flex-wrap:nowrap;gap:5px;margin-top:-10px;margin-bottom:10px;padding:10px 4px;display:flex;overflow-x:auto}.progress-dots::-webkit-scrollbar{display:none}.progress-bar-bg{background:#0000000d;border-radius:20px;height:6px;margin-bottom:10px;overflow:hidden}.progress-fill{border-radius:20px;height:100%;transition:width .6s cubic-bezier(.34,1.56,.64,1)}.progress-info{color:var(--project-text,#111827);opacity:1;justify-content:space-between;align-items:center;gap:8px;font-size:14px;font-weight:800;display:flex}.view-mode-tag{color:#ef4444;background:#ef44441a;border-radius:6px;padding:2px 8px}.question-title{color:#111827;margin-bottom:30px;font-size:24px;font-weight:400;line-height:1.4}.question-title strong,.question-title .rich-text-bold{font-weight:800}.media-section{border-radius:24px;margin-bottom:35px;overflow:hidden}.optimized-image-wrapper{width:100%;position:relative}.materials-block{background:#f8fafc;border:1px solid #0000000a;border-radius:20px;flex-direction:column;align-items:center;margin-bottom:28px;padding:20px;display:flex}.materials-block .materials-label,.materials-block .answer-label{align-self:flex-start}.materials-label,.answer-label{letter-spacing:1.2px;color:var(--project-text,#111827);text-transform:uppercase;margin-bottom:16px;font-size:14px;font-weight:800}.answer-block{background:#fff;border:1px solid #0000000a;border-radius:24px;padding:24px;box-shadow:0 6px 24px #00000008}.answer-block .answer-label{margin-bottom:12px}.question-content{padding:0}.navigation-footer{border-top:2px solid #00000008;gap:20px;margin-top:50px;padding-top:35px;display:flex}.nav-btn{cursor:pointer;color:inherit;background:#00000008;border:none;border-radius:18px;padding:16px 25px;font-weight:800;transition:all .2s}.nav-btn:hover:not(:disabled){background:#0000000f}.btn-premium{cursor:pointer;border:none;border-radius:20px;padding:18px 35px;font-size:17px;font-weight:800;transition:all .3s cubic-bezier(.175,.885,.32,1.275)}.btn-premium.primary{color:#fff;box-shadow:0 10px 25px #00000026}.btn-premium.secondary{color:inherit;background:#0000000d}.btn-premium.finish{color:#fff;background:#10b981;box-shadow:0 10px 25px #10b9814d}.btn-premium:hover{filter:brightness(1.05);transform:translateY(-3px)}.button-group{justify-content:center;gap:15px;display:flex}.demo-assignment-hint{border:1px solid color-mix(in srgb,var(--project-primary,#0ea5e9)40%,transparent);background:linear-gradient(135deg,color-mix(in srgb,var(--project-primary,#0ea5e9)12%,#fff),color-mix(in srgb,var(--project-primary,#0ea5e9)4%,#fff));color:var(--project-text,#111827);box-shadow:0 8px 22px -8px color-mix(in srgb,var(--project-primary,#0ea5e9)40%,transparent);border-radius:18px;align-items:flex-start;gap:10px;margin-bottom:20px;padding:14px 18px;animation:.4s cubic-bezier(.16,1,.3,1) demoHintIn;display:flex}@keyframes demoHintIn{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.demo-assignment-active{animation:1.8s ease-in-out infinite demoTrackPulse}@keyframes demoTrackPulse{0%,to{filter:drop-shadow(0 0 #f9731600)}50%{filter:drop-shadow(0 0 10px #f9731659)}}.demo-assignment-hint svg{color:var(--project-primary,#0ea5e9);flex-shrink:0;margin-top:2px}.demo-assignment-hint div{flex-direction:column;gap:2px;display:flex}.demo-assignment-hint b{text-transform:uppercase;letter-spacing:.03em;font-size:13px;font-weight:900}.demo-assignment-hint span{opacity:.85;font-size:12px;font-weight:600;line-height:1.45}@media (max-width:640px){.demo-assignment-hint{border-radius:14px;padding:10px 12px}.demo-assignment-hint span{font-size:11px}}.score-circle{border:10px solid;border-radius:50%;flex-direction:column;justify-content:center;align-items:center;width:180px;height:180px;margin:0 auto 40px;animation:.5s ease-out scaleIn;display:flex}.score-value{font-size:56px;font-weight:900}.score-label{color:var(--project-text,#111827);opacity:1;text-transform:uppercase;margin-top:-5px;font-size:14px;font-weight:800}.stats-grid{grid-template-columns:1fr 1fr;gap:20px;margin-bottom:40px;display:grid}.stat-item{background:#00000005;border:1px solid #00000005;border-radius:24px;flex-direction:column;gap:6px;padding:20px;display:flex}.stat-item span{color:var(--project-text,#111827);opacity:1;font-size:14px;font-weight:700}.recommendation-box{text-align:center;background:#6366f10d;border:2px solid #6366f11a;border-radius:30px;margin-bottom:40px;padding:30px}.loader-container{flex-direction:column;justify-content:center;align-items:center;height:100dvh;display:flex}.premium-spinner{border:6px solid;border-radius:50%;width:60px;height:60px;animation:1s linear infinite spin}@keyframes fadeIn{0%{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}@keyframes scaleIn{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}.animate-in{animation:.7s cubic-bezier(.23,1,.32,1) forwards fadeIn}@keyframes streakGlowPulse{0%,to{box-shadow:0 0 0 0 color-mix(in srgb,var(--project-primary,#f97316)45%,transparent)}50%{box-shadow:0 0 42px 8px color-mix(in srgb,var(--project-primary,#f97316)55%,transparent)}}@keyframes streakDigitFlash{0%{opacity:0;filter:brightness(2);transform:translateY(-30px)scale(1.15)}60%{filter:brightness(1.4)}to{opacity:1;filter:brightness();transform:translateY(0)scale(1)}}@keyframes streakRecordPulse{0%,to{opacity:.9}50%{opacity:1}}.streak-modal-overlay{z-index:100;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#080c149e;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.streak-modal-card{text-align:center;width:100%;max-width:360px;color:var(--project-text,#111827);background:radial-gradient(120% 90% at 50% 0%,color-mix(in srgb,var(--project-primary,#f97316)16%,#fff),#fff 65%);border:1px solid color-mix(in srgb,var(--project-primary,#f97316)26%,transparent);border-radius:32px;padding:40px 28px 28px;animation:2.2s ease-in-out infinite streakGlowPulse;overflow:hidden}.streak-flame{width:88px;height:88px;filter:drop-shadow(0 6px 16px color-mix(in srgb,var(--project-primary,#f97316)50%,transparent));justify-content:center;align-items:center;margin:0 auto 6px;font-size:58px;display:flex}.streak-celebration-title{letter-spacing:-.01em;margin:0 0 6px;font-size:24px;font-weight:900}.streak-counter{min-height:96px;color:var(--project-primary,#f97316);justify-content:center;align-items:center;margin:8px 0 2px;font-size:74px;font-weight:900;line-height:1;display:flex}.streak-counter-digit{text-shadow:0 0 24px color-mix(in srgb,var(--project-primary,#f97316)35%,transparent);animation:.5s cubic-bezier(.22,1,.36,1) streakDigitFlash;display:inline-block}.streak-celebration-subtitle{opacity:.9;margin:0 0 4px;font-size:15px;font-weight:600}.streak-record-note{color:color-mix(in srgb,var(--project-primary,#f97316)55%,#111827);margin:6px 0 18px;font-size:13px;font-weight:700;animation:1.6s ease-in-out infinite streakRecordPulse}.streak-go-review-btn{cursor:pointer;color:#fff;background:linear-gradient(135deg,var(--project-primary,#f97316),color-mix(in srgb,var(--project-primary,#f97316)70%,#f97316));width:100%;box-shadow:0 10px 22px -8px color-mix(in srgb,var(--project-primary,#f97316)55%,transparent);border:none;border-radius:16px;margin-top:10px;padding:15px 20px;font-size:15px;font-weight:800;transition:transform .15s,box-shadow .2s,filter .2s}.streak-go-review-btn:hover{filter:brightness(1.05);box-shadow:0 14px 30px -10px color-mix(in srgb,var(--project-primary,#f97316)65%,transparent);transform:translateY(-1px)}.streak-go-review-btn:active{transform:translateY(0)}@media (max-width:768px){.premium-header{padding:18px 12px}.header-content{flex-direction:column;align-items:flex-start;gap:12px}.assignment-badge{align-self:flex-end}.premium-main{max-width:100%;padding:0 10px calc(110px + env(safe-area-inset-bottom))}.premium-card{border-radius:28px;padding:24px 16px}.card-title{font-size:26px}.card-subtitle{margin-bottom:24px;font-size:14px}.progress-container{margin-bottom:20px}.progress-dots{gap:6px}.progress-dots button{background-clip:content-box;margin:-4px;padding:4px}.progress-bar-bg{height:5px}.progress-info{font-size:14px}.question-title{margin-bottom:20px;font-size:20px}.materials-block{border-radius:16px;margin-bottom:18px;padding:14px}.materials-label,.answer-label{margin-bottom:10px;font-size:14px}.answer-block{border-radius:20px;padding:16px;box-shadow:0 4px 12px #00000005}.navigation-footer{flex-direction:column;gap:12px;margin-top:30px;padding-top:25px}.nav-btn{text-align:center;border-radius:14px;width:100%;padding:14px 20px;font-size:16px}.btn-premium{text-align:center;border-radius:16px;width:100%;padding:16px 24px;font-size:16px}.btn-premium.primary,.btn-premium.secondary,.btn-premium.finish{flex:none;width:100%}.score-circle{width:140px;height:140px;margin-bottom:24px}.score-value{font-size:44px}.stats-grid{grid-template-columns:1fr;gap:12px}.stat-item{border-radius:18px;padding:16px}.button-group{flex-direction:column;gap:12px}.button-group .btn-premium{width:100%}.recommendation-box{border-radius:24px;padding:20px}}.exam-timer{flex-direction:column;align-items:flex-end;gap:4px;min-width:120px;display:flex}.exam-timer-label{letter-spacing:.08em;text-transform:uppercase;color:#64748b;font-size:11px;font-weight:800}.exam-timer-value{font-variant-numeric:tabular-nums;color:#0f172a;font-size:22px;font-weight:900}.exam-timer-bar{background:#e2e8f0;border-radius:999px;width:120px;height:6px;overflow:hidden}.exam-timer-bar-fill{background:#0ea5e9;height:100%;transition:width 1s linear}.exam-timer.is-urgent .exam-timer-value{color:#dc2626}.exam-timer.is-urgent .exam-timer-bar-fill{background:#dc2626}.roadmap-exam-result{text-align:center;border-radius:14px;max-width:520px;margin:0 auto 20px;padding:14px 16px;font-size:15px;font-weight:800}.roadmap-exam-result.is-passed{color:#047857;background:#ecfdf5;border:1px solid #a7f3d0}.roadmap-exam-result.is-failed{color:#b91c1c;background:#fef2f2;border:1px solid #fecaca}.roadmap-lesson-result{background:#fffbeb;border:1px solid #fde68a;border-radius:14px;flex-direction:column;align-items:center;gap:8px;max-width:520px;margin:0 auto 20px;padding:14px 16px;display:flex}.roadmap-lesson-result-title{color:#92400e;text-align:center;font-size:14px;font-weight:800}.roadmap-lesson-result-stars{gap:6px;display:flex}.roadmap-lesson-star{clip-path:polygon(50% 0%,61% 35%,98% 35%,68% 57%,79% 91%,50% 70%,21% 91%,32% 57%,2% 35%,39% 35%);background:#fde68a;width:18px;height:18px}.roadmap-lesson-star.is-filled{background:#f59e0b}.premium-header .header-content{align-items:center}@media (max-width:480px){.premium-card{padding:18px 12px}.question-title{font-size:18px}.btn-premium{padding:14px 18px;font-size:15px}.nav-btn{padding:12px 16px;font-size:15px}}.premium-card,.answer-block,.question-content,.crossword-container,.review-panel,.review-card-body{min-width:0;max-width:100%}.answer-block{overflow-x:visible}.review-panel{min-width:0;max-width:100%;margin-top:32px}.review-panel-header{flex-wrap:wrap;align-items:center;gap:14px;margin-bottom:20px;display:flex}.review-panel-icon{background:#6366f1;border-radius:14px;flex-shrink:0;justify-content:center;align-items:center;width:48px;height:48px;display:flex;box-shadow:0 8px 20px #6366f140}.review-panel-title{color:#1e293b;margin:0;font-size:clamp(20px,5vw,24px);font-weight:800}.review-panel-subtitle{color:#94a3b8;margin:4px 0 0;font-size:13px;font-weight:600;line-height:1.4}.review-legend{background:#f8fafc;border:2px solid #e2e8f0;border-radius:14px;flex-wrap:wrap;gap:12px 20px;margin-bottom:24px;padding:14px 16px;display:flex}.review-legend-item{color:#1e293b;align-items:center;gap:10px;min-width:0;font-size:13px;font-weight:800;display:flex}.review-legend-badge{color:#fff;border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;width:24px;height:24px;font-size:13px;display:flex}.review-card-inner{background:#fff;border:1px solid #0000000f;border-radius:20px;min-width:0;max-width:100%;margin-bottom:16px;padding:16px;position:relative;box-shadow:0 8px 24px #00000005}.review-card-accent{border-radius:20px 0 0 20px;width:4px;position:absolute;top:0;bottom:0;left:0}.review-card-top{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:14px;display:flex}.review-card-meta{flex:180px;min-width:0}.review-card-badges{flex-wrap:wrap;align-items:center;gap:6px;margin-bottom:6px;display:flex}.review-card-qnum{text-transform:uppercase;letter-spacing:.5px;font-size:11px;font-weight:800}.review-card-status{border-radius:8px;padding:3px 10px;font-size:11px;font-weight:800}.review-question-title{color:#1e293b;word-break:break-word;margin:0;font-size:clamp(15px,4vw,17px);font-weight:700;line-height:1.45}.review-score-block{text-align:right;flex:none}.review-score-value{color:#1e293b;font-size:15px;font-weight:900}.review-score-bar{background:#0000000d;border-radius:10px;width:72px;height:4px;margin-top:6px;margin-left:auto;overflow:hidden}.review-score-fill{border-radius:10px;height:100%;transition:width .6s}.review-content-block{-webkit-overflow-scrolling:touch;background:#f8fafc;border-radius:14px;min-width:0;max-width:100%;padding:14px;overflow-x:auto}.review-fill-row{border-bottom:1px solid #0000000a;grid-template-columns:28px 1fr;align-items:start;gap:8px 12px;padding:12px 14px;display:grid}.review-fill-row:last-child{border-bottom:none}.review-fill-row.is-correct{background:#10b98108}.review-fill-row.is-incorrect{background:#ef444408}.review-fill-idx{padding-top:2px;font-size:13px;font-weight:800;line-height:1.4}.review-fill-answers{flex-direction:column;gap:8px;min-width:0;display:flex}.review-fill-answer{word-break:break-word;font-size:14px;font-weight:800;line-height:1.45}.review-fill-label{color:#64748b;letter-spacing:.04em;margin-bottom:2px;font-size:10px;font-weight:700;display:block}.review-fill-correct-desktop{display:none}.review-fill-correct-mobile{display:block}.review-test-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,180px),1fr));gap:12px;margin-top:8px;display:grid}.review-test-option{border-radius:14px;padding:14px;position:relative}.review-test-option-text{color:#000;word-break:break-word;margin-bottom:6px;font-size:14px;font-weight:900}.review-imagemap-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:16px;display:grid}.review-crossword-tabs{gap:8px;margin-bottom:12px;display:flex}.review-crossword-tab{color:#64748b;cursor:pointer;text-align:center;background:#fff;border:2px solid #e2e8f0;border-radius:12px;flex:1;padding:10px 12px;font-size:13px;font-weight:800;transition:all .15s}.review-crossword-tab.is-active{color:#4338ca;background:#6366f114;border-color:#6366f1}.review-crossword-panels{flex-direction:column;gap:24px;display:flex}.review-crossword-panel.is-hidden-mobile{display:none}.review-word-row{border-radius:10px;flex-wrap:wrap;align-items:flex-start;gap:8px 12px;padding:10px 12px;font-size:13px;display:flex}.review-word-row.is-correct{background:#f0fdf4;border:1px solid #10b98133}.review-word-row.is-wrong{background:#fef2f2;border:1px solid #ef444433}.matching-review-layout{z-index:10;justify-content:space-between;gap:24px;min-width:0;display:flex;position:relative}.matching-review-col{flex-direction:column;flex:1 1 0;gap:14px;min-width:0;max-width:46%;display:flex}.matching-review-wrap{-webkit-overflow-scrolling:touch;width:100%;min-height:200px;padding:12px 0;position:relative;overflow-x:auto}@media (min-width:641px){.review-fill-row{grid-template-columns:28px 1fr 1fr;align-items:center}.review-fill-correct-desktop{display:block}.review-fill-correct-mobile,.review-crossword-tabs{display:none}.review-crossword-panel.is-hidden-mobile{display:block}}@media (max-width:640px){.review-panel-icon{border-radius:12px;width:42px;height:42px}.review-card-inner{border-radius:16px;padding:14px 12px}.review-content-block{border-radius:12px;padding:12px}.review-score-block{text-align:left;justify-content:space-between;align-items:center;width:100%;display:flex}.review-score-bar{flex:1;max-width:100px;margin-left:0}.review-legend{flex-direction:column;gap:10px;padding:12px 14px}.matching-review-layout{flex-direction:column;gap:16px}.matching-review-col{width:100%;max-width:100%}.cw-scroll-hint{display:block}}.blank-sheet{--blank-accent:#0ea5e9;--blank-ink:#1f2937;--blank-muted:#6b7280;--blank-line:#d8d2c4;width:100%}.blank-sheet__paper{border:1px solid var(--blank-line);color:var(--blank-ink);background:linear-gradient(#fffdf8 0%,#fdfaf2 100%);border-radius:10px;padding:32px 34px 0;box-shadow:0 18px 44px #0f172a14}.blank-sheet__head{border-bottom:2px solid var(--blank-ink);padding-bottom:22px}.blank-sheet__head-top{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;display:flex}.blank-sheet__stamp{border:1px solid var(--blank-ink);letter-spacing:.14em;text-transform:uppercase;border-radius:3px;padding:4px 10px;font-size:10px;font-weight:800;display:inline-block}.blank-sheet__date{color:var(--blank-muted);font-size:12px;font-weight:600}.blank-sheet__title{color:var(--blank-ink);margin:16px 0 20px;font-size:24px;font-weight:700;line-height:1.3}.blank-sheet__nav{border-bottom:1px dashed var(--blank-line);flex-wrap:wrap;gap:6px;padding:14px 0;display:flex}.blank-sheet__nav-chip{min-width:30px;height:30px;color:var(--blank-muted);border:1px solid var(--blank-line);cursor:pointer;background:#fff;border-radius:4px;justify-content:center;align-items:center;padding:0 6px;font-size:12px;font-weight:700;transition:all .15s;display:inline-flex}.blank-sheet__nav-chip:hover{border-color:var(--blank-accent);color:var(--blank-ink)}.blank-sheet__nav-chip.is-answered{background:var(--blank-ink);border-color:var(--blank-ink);color:#fff}.blank-sheet__tasks{margin:0;padding:0;list-style:none}.blank-sheet__task{border-bottom:1px dashed var(--blank-line);padding:26px 0 30px;scroll-margin-top:90px;transition:background-color .3s}.blank-sheet__task:last-child{border-bottom:0}.blank-sheet__task.is-highlighted{background:#facc151f}.blank-sheet__task-head{justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px;display:flex}.blank-sheet__task-num{border:1px solid var(--blank-ink);letter-spacing:.12em;color:var(--blank-ink);border-radius:3px;padding:3px 9px;font-size:13px;font-weight:800}.blank-sheet__task-status{letter-spacing:.08em;text-transform:uppercase;color:#b6b1a6;font-size:11px;font-weight:700}.blank-sheet__task-status.is-answered{color:#15803d}.blank-sheet__task--embed .blank-sheet__task-body{border:1px dashed #c9c2b2;border-left:3px solid var(--blank-accent);background:#fffefa;border-radius:4px;padding:16px 18px}.blank-sheet__task-body .question-title{color:var(--blank-ink);margin-bottom:14px;font-size:17px;font-weight:600;line-height:1.45}.blank-sheet__task-body .materials-label{letter-spacing:.12em;color:var(--blank-muted);font-size:10px}.blank-sheet__task-body .materials-block,.blank-sheet__task-body .answer-block{box-shadow:none;background:0 0;border:0;border-radius:0;margin:0 0 4px;padding:0}.blank-sheet__task-body .answer-label{display:none}.blank-sheet__task-body .question-content{padding:0}.blank-sheet .fill-input-item input,.blank-sheet .sentence-gap-input,.blank-sheet .sentence-input{border:0;border-bottom:1px solid var(--blank-ink);box-shadow:none;background:0 0;border-radius:0}.blank-sheet .fill-input-item input:focus,.blank-sheet .sentence-gap-input:focus,.blank-sheet .sentence-input:focus{border-bottom-color:var(--blank-accent)}.blank-sheet__pages{flex-direction:column;gap:22px;padding:22px 0;display:flex;overflow-x:auto}.blank-sheet__canvas-page{border:1px solid var(--blank-line);background:#fffdf8;border-radius:8px;width:100%;min-width:640px;position:relative;overflow:hidden;box-shadow:0 12px 30px #0f172a0f}.blank-sheet__canvas-bg{object-fit:fill;-webkit-user-select:none;user-select:none;width:100%;height:100%;display:block;position:absolute;inset:0}.blank-sheet__slot{scroll-margin-top:90px;transition:background-color .3s,box-shadow .3s;position:absolute}.blank-sheet__slot.is-highlighted{background:#facc1529;border-radius:4px;box-shadow:0 0 0 2px #facc158c}.blank-sheet__slot .materials-block,.blank-sheet__slot .answer-block{box-shadow:none;background:0 0;border:0;border-radius:0;margin:0;padding:0}.blank-sheet__slot .answer-label{display:none}.blank-sheet__slot .question-title{color:var(--blank-ink);margin:0 0 8px;font-size:15px;font-weight:600;line-height:1.4}.blank-sheet__slot .question-content{padding:0}.blank-sheet__slot .materials-label{letter-spacing:.12em;color:var(--blank-muted);font-size:10px}@media (max-width:640px){.blank-sheet__slot .question-title{font-size:13px}}.blank-sheet__slot.is-framed{border-radius:2px;overflow:hidden}.blank-sheet__slot-inner{transform-origin:50% 0;width:100%}.blank-sheet__slot.is-framed .blank-sheet__slot-inner{height:100%}.blank-sheet__slot--answer .question-content,.blank-sheet__slot--question .question-content{padding:0}.sheet-element-text{color:var(--blank-ink);white-space:pre-wrap;font-size:15px;line-height:1.45}.sheet-element-image{cursor:zoom-in;justify-content:center;align-items:center;width:100%;display:flex}.sheet-element-image img{object-fit:contain;border-radius:4px;width:100%;height:auto;display:block}.blank-sheet__slot.is-framed .sheet-element-image,.blank-sheet__slot.is-framed .sheet-element-image img{height:100%}.sheet-element-media{width:100%}.sheet-option{border:1px solid var(--blank-line);width:100%;color:var(--blank-ink);text-align:left;cursor:pointer;background:#ffffffb8;border-radius:6px;align-items:center;gap:10px;padding:8px 12px;font-family:inherit;font-size:15px;line-height:1.4;transition:border-color .15s,background-color .15s,box-shadow .15s;display:flex}.sheet-option__input{width:18px;height:18px;accent-color:var(--blank-ink);flex:none;margin:0}.sheet-option__body{flex-direction:column;flex:1;gap:6px;min-width:0;display:flex}.sheet-option__text{font-weight:500}.sheet-option__media img{border-radius:6px;max-width:100%;height:auto;display:block}.sheet-option__audio{max-width:100%}.sheet-option.is-selected{border-color:var(--blank-ink);background:#1f29370f}.sheet-option__pair{white-space:nowrap;text-overflow:ellipsis;max-width:45%;color:var(--blank-muted);margin-left:auto;font-size:12px;overflow:hidden}.sheet-option--matching.is-picked{border-color:var(--blank-accent);box-shadow:0 0 0 2px #0ea5e940}.sheet-option.is-disabled{cursor:default;opacity:.75}.sheet-option.is-missing{color:#b91c1c;border-style:dashed;font-size:12px;display:block}.sheet-option--sub{background:0 0;border:0;padding:0;display:block}.sheet-option__muted{color:var(--blank-muted);font-size:12px}.blank-sheet__foot{z-index:5;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border-top:1px solid var(--blank-line);background:#fffdf7f5;border-radius:0 0 10px 10px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin:0 -34px;padding:16px 34px;display:flex;position:sticky;bottom:0}.blank-sheet__progress{letter-spacing:.04em;color:var(--blank-muted);font-size:12px;font-weight:600}.blank-sheet__progress b{color:var(--blank-ink)}.blank-sheet__finish{flex:0 320px;min-width:220px}@media (max-width:640px){.blank-sheet__paper{border-radius:8px;padding:20px 16px 0}.blank-sheet__title{font-size:19px}.blank-sheet__task{padding:20px 0 24px}.blank-sheet__foot{margin:0 -16px;padding:12px 16px}.blank-sheet__finish{flex:100%;min-width:0}}
