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ease;white-space:nowrap;flex-shrink:0}.bug-report-btn:hover{background:var(--color-incorrect-bg);border-color:var(--color-incorrect-border)}.bug-report-btn:active{transform:translate(1px,1px);box-shadow:none}.difficulty-label{font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;padding:2px 8px;border-radius:999px}.difficulty-easy{color:var(--color-correct-text);background:var(--color-correct-bg)}.difficulty-medium{color:var(--color-partial-text);background:var(--color-partial-bg)}.difficulty-hard{color:var(--color-incorrect-text);background:var(--color-incorrect-bg)}#question-container{background:var(--bg-surface);padding:clamp(1.25rem,4vw,2.25rem);border-radius:var(--press-radius);border:1.5px solid var(--border-card);box-shadow:var(--press-shadow-card)}.question-header-back{margin-top:.6rem}.question-header{margin-bottom:clamp(1rem,3vw,1.75rem);padding-bottom:clamp(.75rem,2vw,1.125rem);border-bottom:2px solid var(--border-subtle)}.question-header h2{color:var(--text-primary);font-size:1.76rem;font-weight:800;margin-bottom:6px;letter-spacing:-.02em}.question-header-path{font-size:.85rem;color:var(--text-tertiary);margin-bottom:6px;display:flex;align-items:center;gap:.5rem}.question-header .total-marks{color:var(--accent-blue);font-size:1rem;font-weight:700}.part-text table,.mark-scheme table,.self-marking-question-text table{width:100%;border-collapse:collapse;margin:12px 0;font-size:.95rem;border-radius:8px;overflow:hidden}.part-text table th,.mark-scheme table th,.self-marking-question-text table th{background:var(--bg-surface-alt);color:var(--text-primary);font-weight:700;text-align:left;padding:10px 14px;border:1px solid var(--border-default)}.part-text table td,.mark-scheme table td,.self-marking-question-text table td{padding:8px 14px;border:1px solid var(--border-default);color:var(--text-primary)}.part-text table tbody tr:nth-child(2n),.mark-scheme table tbody tr:nth-child(2n),.self-marking-question-text table tbody tr:nth-child(2n){background:var(--bg-surface-alt)}.part-text table tbody tr:nth-child(odd),.mark-scheme table tbody tr:nth-child(odd),.self-marking-question-text table tbody tr:nth-child(odd){background:var(--bg-surface)}.question-part{margin-bottom:clamp(1.5rem,4vw,2.25rem);padding-bottom:clamp(1.25rem,3vw,1.875rem);border-bottom:1px solid var(--border-subtle)}.question-part:last-child{border-bottom:none;margin-bottom:0}.part-label{font-weight:800;color:var(--accent-blue);font-size:1.1rem;letter-spacing:-.01em;margin-right:.5em}.part-label-standalone{font-weight:800;color:var(--accent-blue);font-size:1.1rem;letter-spacing:-.01em;margin-bottom:12px}.part-text{margin-bottom:16px;line-height:1.7}.part-marks{color:var(--text-secondary);font-size:.88rem;font-weight:600;margin-top:12px;text-align:right}.part-diagrams-grid{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:16px}.part-diagram-figure{margin:0;flex:1 1 0;min-width:0;max-width:min(100%,420px)}.part-diagrams-grid .part-diagram-figure:first-child:nth-last-child(1){flex:0 1 auto;max-width:min(100%,480px)}.part-diagrams-grid .part-diagram-figure:first-child:nth-last-child(2),.part-diagrams-grid .part-diagram-figure:first-child:nth-last-child(2)~.part-diagram-figure{flex:0 1 calc(50% - 8px);max-width:min(calc(50% - 8px),400px)}.part-diagram{max-width:100%;width:auto;height:auto;max-height:380px;border-radius:8px;background:var(--bg-surface);padding:8px;border:1px solid var(--border-subtle)}.part-diagram-caption{text-align:center;font-size:.78rem;font-weight:700;color:var(--text-secondary);margin-top:4px}.part-diagram-clickable{cursor:pointer;transition:border-color .2s,box-shadow .2s}.part-diagram-clickable:hover{border-color:var(--accent-blue);box-shadow:var(--shadow-md)}.part-tables-grid{margin-bottom:16px}.part-table-block{margin-bottom:12px;border:1px solid var(--border-subtle);border-radius:var(--press-radius-sm);overflow:hidden;background:var(--bg-surface)}.part-table-clickable{cursor:pointer;transition:border-color .2s,box-shadow .2s}.part-table-clickable:hover{border-color:var(--accent-blue);box-shadow:var(--shadow-md)}.part-table-label{font-size:.78rem;font-weight:700;color:var(--text-secondary);padding:6px 10px;background:var(--bg-surface-alt);border-bottom:1px solid var(--border-subtle)}.part-inline-table{width:100%;border-collapse:collapse;font-size:.9rem}.part-inline-table th,.part-inline-table td{padding:8px 12px;border:1px solid var(--border-subtle);text-align:left}.part-inline-table th{background:var(--bg-surface-alt);font-weight:700;font-size:.85rem}.part-inline-table tbody tr:nth-child(2n){background:var(--bg-surface-alt)}#question-container.has-figure-sidebar{display:grid;grid-template-columns:1fr 180px;gap:clamp(.75rem,2vw,1rem);padding:0;background:none;border:none;box-shadow:none}#question-container.has-figure-sidebar #question-content-inner{padding:clamp(1.25rem,4vw,2.25rem);background:var(--bg-surface);border:1.5px solid var(--border-card);border-radius:var(--press-radius);box-shadow:var(--press-shadow-card)}body:has(.has-figure-sidebar){max-width:1120px}.figure-sidebar{position:sticky;top:1rem;align-self:start;padding:14px;background:var(--bg-surface);border:1.5px solid var(--edge);border-radius:var(--press-radius);box-shadow:var(--press-shadow-sm);max-height:calc(100vh - 2rem);overflow-y:auto;overflow-x:hidden;display:flex;flex-direction:column;min-height:0;scrollbar-width:thin;scrollbar-color:var(--text-tertiary) transparent}.figure-sidebar::-webkit-scrollbar{width:4px}.figure-sidebar::-webkit-scrollbar-track{background:transparent}.figure-sidebar::-webkit-scrollbar-thumb{background:var(--text-tertiary);border-radius:4px}.figure-sidebar::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}.figure-sidebar-thumbs{display:flex;flex-direction:column;gap:12px;overflow-y:auto;flex:1 1 auto;min-height:0;padding-right:6px}.figure-sidebar-thumbs::-webkit-scrollbar{width:4px}.figure-sidebar-thumbs::-webkit-scrollbar-track{background:transparent}.figure-sidebar-thumbs::-webkit-scrollbar-thumb{background:var(--text-tertiary);border-radius:4px}.figure-sidebar-thumbs::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}.figure-sidebar-thumbs{scrollbar-width:thin;scrollbar-color:var(--text-tertiary) transparent}.figure-sidebar-title{font-size:.68rem;font-weight:800;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.06em;margin-bottom:2px}.figure-thumb{cursor:pointer;border-radius:8px;border:2px solid transparent;padding:4px;background:var(--bg-surface);transition:border-color .2s,box-shadow .2s;display:block;width:100%;text-align:center;font-family:inherit}.figure-thumb:hover{border-color:var(--accent-blue);box-shadow:var(--shadow-sm)}.figure-thumb.active{border-color:var(--accent-blue);box-shadow:var(--shadow-md)}.figure-thumb img{width:100%;height:auto;border-radius:4px;display:block;background:var(--bg-surface)}.figure-thumb-label{font-size:.68rem;font-weight:700;color:var(--text-secondary);margin-top:3px}.sidebar-title-tables{margin-top:6px;padding-top:8px;border-top:1px solid var(--border-subtle)}.table-thumb{cursor:pointer;border-radius:8px;border:2px solid transparent;padding:8px;background:var(--bg-surface);transition:border-color .2s,box-shadow .2s;display:flex;align-items:center;gap:6px;width:100%;text-align:left;font-family:inherit}.table-thumb:hover{border-color:var(--accent-blue);box-shadow:var(--shadow-sm)}.table-thumb.active{border-color:var(--accent-blue);box-shadow:var(--shadow-md)}.table-thumb-icon{font-size:.9rem;color:var(--accent-blue);flex-shrink:0}.table-thumb-label{font-size:.73rem;font-weight:700;color:var(--text-secondary)}.figure-sidebar-mobile-trigger{display:none}.figure-viewer-overlay{position:fixed;inset:0;background:#0000008c;display:flex;align-items:center;justify-content:center;z-index:100;cursor:pointer;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}[data-theme=dark] .figure-viewer-overlay{background:#000000bf}.figure-viewer-content{position:relative;background:var(--bg-surface);border:1.5px solid var(--edge);border-radius:var(--press-radius);padding:20px;max-width:90vw;max-height:90vh;box-shadow:6px 6px 0 var(--edge);cursor:default;display:flex;flex-direction:column;align-items:center}.figure-viewer-content img{max-width:100%;max-height:calc(90vh - 100px);object-fit:contain;border-radius:8px;background:var(--bg-surface)}.figure-viewer-caption{margin-top:10px;font-size:.95rem;font-weight:700;color:var(--text-secondary)}.figure-viewer-content-table{max-width:90vw;overflow:visible}.figure-viewer-content-table .viewer-table{display:block;overflow-x:auto;max-width:100%}.equation-sheet-viewer img{max-width:80vw;max-height:calc(80vh - 100px)}.viewer-table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:300px}.viewer-table th,.viewer-table td{padding:10px 14px;border:1px solid var(--border-subtle);text-align:left}.viewer-table th{background:var(--bg-surface-alt);font-weight:700}.viewer-table tbody tr:nth-child(2n){background:var(--bg-surface-alt)}.figure-viewer-close{position:absolute;top:8px;right:8px;background:var(--bg-surface-alt);border:1.5px solid var(--edge);border-radius:50%;width:32px;height:32px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1.2rem;color:var(--text-secondary);transition:background .15s,color .15s;font-family:inherit;box-shadow:1px 1px 0 var(--edge)}.figure-viewer-close:hover{background:var(--bg-surface);color:var(--text-primary)}.figure-viewer-nav{position:absolute;top:50%;transform:translateY(-50%);background:var(--bg-surface);border:1.5px solid var(--edge);border-radius:50%;width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:1.4rem;color:var(--text-secondary);box-shadow:2px 2px 0 var(--edge);transition:transform .12s,box-shadow .12s,background .15s;font-family:inherit}.figure-viewer-nav:hover{background:var(--bg-surface-alt);color:var(--text-primary)}.figure-viewer-nav:active{transform:translateY(-50%) translate(1px,1px);box-shadow:none}.figure-viewer-prev{left:-18px}.figure-viewer-next{right:-18px}.mc-options{display:flex;flex-direction:column;gap:10px}.mc-option{display:flex;align-items:center;padding:12px 16px;background:var(--bg-surface);border:1.5px solid var(--edge);border-radius:var(--press-radius-sm);cursor:pointer;box-shadow:var(--press-shadow-sm);transition:transform .12s,box-shadow .12s,background .15s,border-color .15s;-webkit-user-select:none;user-select:none}.mc-option:hover{background:var(--bg-surface-alt);transform:translateY(-1px)}.mc-option:active{transform:translate(1px,1px);box-shadow:none}.mc-option input[type=radio],.mc-option input[type=checkbox]{margin-right:12px;width:18px;height:18px;accent-color:var(--accent-blue)}.mc-option input:disabled{cursor:not-allowed}.mc-option.correct{background:var(--color-correct-bg);border-color:var(--color-correct-border);box-shadow:none;transform:none}.mc-option.incorrect{background:var(--color-incorrect-bg);border-color:var(--color-incorrect-border);box-shadow:none;transform:none}.mc-option.selected{border-color:var(--accent-blue);background:var(--accent-blue-muted)}.mc-options-grid{display:grid;grid-template-columns:repeat(2,1fr)}.mc-option-image-label{flex-direction:column;align-items:flex-start;gap:8px}.mc-option-image-label span{display:flex;flex-direction:column;align-items:center;width:100%}.mc-option-image{max-width:100%;max-height:180px;display:block;margin:4px auto 0;border-radius:6px;background:var(--bg-surface);padding:4px;border:1px solid var(--border-subtle)}.review-options-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}.review-option-image-item{flex-direction:column;align-items:center}.review-option-image{max-width:100%;max-height:150px;display:block;margin:6px auto 0;border-radius:6px;background:var(--bg-surface);padding:4px;border:1px solid var(--border-subtle)}.mark-scheme{margin-top:20px;padding:16px 18px;background:var(--color-mark-scheme-bg);border:1.5px solid var(--color-mark-scheme-border);border-radius:var(--press-radius-sm);box-shadow:2px 2px 0 var(--color-mark-scheme-border)}.mark-scheme h4{color:var(--color-mark-scheme-text);margin-bottom:10px;font-size:.95rem;font-weight:700}.mark-scheme ul{margin-left:20px;color:var(--color-mark-scheme-text)}.mark-scheme li{margin-bottom:5px}.self-mark{margin-top:15px;display:flex;align-items:center;gap:10px}.self-mark label{font-weight:600;color:var(--text-secondary)}.self-mark input[type=number]{width:60px;padding:8px;border:2px solid var(--border-input);border-radius:8px;font-size:1rem;text-align:center;background:var(--bg-input);color:var(--text-primary)}.self-mark input[type=number]:focus{outline:none;border-color:var(--border-input-focus)}.self-mark .max-marks{color:var(--text-secondary)}.auto-mark-result{margin-top:15px;padding:10px 15px;border-radius:8px;font-weight:600}.auto-mark-result.correct{background:var(--color-correct-bg);color:var(--color-correct-text);border:1px solid var(--color-correct-border)}.auto-mark-result.incorrect{background:var(--color-incorrect-bg);color:var(--color-incorrect-text);border:1px solid var(--color-incorrect-border)}.submit-btn{display:block;width:100%;padding:16px;margin-top:24px;font-size:1.3rem;font-weight:700;background:var(--accent-blue);color:var(--text-on-accent);border:1.5px solid var(--edge);border-radius:999px;cursor:pointer;box-shadow:var(--press-shadow-sm);transition:transform .12s ease,box-shadow .12s ease,background .15s;-webkit-user-select:none;user-select:none;touch-action:manipulation;letter-spacing:.01em}.submit-btn:hover{background:var(--accent-blue-hover);transform:translateY(-1px)}.submit-btn:active{transform:translate(2px,2px);box-shadow:none}.submit-btn:disabled{background:var(--bg-surface-alt);color:var(--text-tertiary);cursor:not-allowed;border:1.5px solid var(--border-default);box-shadow:none;transform:none}.marking-summary{margin-top:clamp(1rem,3vw,1.75rem);padding:clamp(1rem,3vw,1.75rem);background:var(--bg-surface);border-radius:var(--press-radius);text-align:center;border:1.5px solid var(--edge);box-shadow:var(--press-shadow)}.marking-summary h3{color:var(--accent-blue);margin-bottom:10px;font-weight:800;letter-spacing:-.01em}.marking-summary p{font-size:2rem;font-weight:800;color:var(--text-primary)}.bank-score-btn{padding:12px 30px;font-size:1rem;font-weight:700;background:var(--accent-blue);color:var(--text-on-accent);border:1.5px solid rgba(0,0,0,.15);border-radius:999px;cursor:pointer;box-shadow:2px 2px #0000004d;transition:transform .12s,box-shadow .12s,background .15s}.bank-score-btn:hover{background:var(--accent-blue-hover)}.bank-score-btn:active{transform:translate(1px,1px);box-shadow:none}.marking-summary-buttons{display:flex;gap:12px;justify-content:center;margin-top:20px}.reset-question-btn{padding:12px 30px;font-size:1rem;font-weight:600;background:var(--bg-surface-alt);color:var(--text-secondary);border:1.5px solid var(--edge);border-radius:999px;cursor:pointer;box-shadow:var(--press-shadow-sm);transition:transform .12s,box-shadow .12s,background .15s}.reset-question-btn:hover{background:var(--color-incorrect-bg);border-color:var(--color-incorrect-border);color:var(--color-incorrect-text)}.reset-question-btn:active{transform:translate(1px,1px);box-shadow:none}.question-part.marking-dimmed{opacity:.35;transition:opacity .3s}.question-part.marking-active{opacity:1;transition:opacity .3s}.question-part.marking-done{opacity:.7;transition:opacity .3s}.question-part.marking-alt{background:var(--bg-surface-alt);border-radius:8px;padding:16px;margin-left:-16px;margin-right:-16px}.ew-container{display:flex;flex-direction:column}.ew-encouragement{font-size:.88rem;color:var(--accent-blue);font-style:italic;margin-bottom:10px;line-height:1.5;padding:10px 14px;background:var(--accent-blue-muted);border-radius:8px;border-left:3px solid var(--accent-blue)}.ew-textarea{width:100%;min-height:150px;padding:14px 16px;font-family:inherit;font-size:1rem;line-height:1.65;color:var(--text-primary);background:var(--bg-input);border:2px solid var(--border-input);border-radius:var(--press-radius-sm);resize:vertical;transition:border-color .2s,box-shadow .2s}.ew-textarea:focus{outline:none;border-color:var(--border-input-focus);background:var(--bg-input-focus);box-shadow:0 0 0 3px var(--accent-blue-muted)}.ew-textarea:read-only,.ew-textarea:disabled{opacity:.7;cursor:not-allowed;background:var(--bg-surface-alt)}.ew-textarea::placeholder{color:var(--text-tertiary)}.ew-char-counter{text-align:right;font-size:.8rem;color:var(--text-secondary);margin-top:6px}.ew-char-counter.near-limit{color:var(--color-incorrect);font-weight:700}.self-marking-overlay{position:fixed;inset:0;z-index:950;display:flex;flex-direction:column;background:var(--bg-body)}@keyframes smHeaderSlideIn{0%{transform:translateY(-100%);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes smNavSlideIn{0%{transform:translateY(100%);opacity:0}to{transform:translateY(0);opacity:1}}@keyframes smTitleFadeIn{0%{opacity:0}to{opacity:1}}@keyframes smTitlePop{0%{transform:scale(1);opacity:1}40%{transform:scale(1.18);opacity:0}to{transform:scale(1.3);opacity:0}}@keyframes smCurtainFadeOut{0%{opacity:1}to{opacity:0}}@keyframes smPanelSwellIn{0%{opacity:0;transform:scale(.82)}50%{opacity:1;transform:scale(1.02)}75%{opacity:1;transform:scale(.995)}to{opacity:1;transform:scale(1)}}.sm-intro-curtain{position:absolute;inset:0;z-index:10;display:flex;align-items:center;justify-content:center;padding-bottom:6%;background:var(--bg-body);pointer-events:none}.sm-intro-title{font-family:Merriweather,Georgia,Times New Roman,serif;font-size:clamp(3rem,7.5vw,5.25rem);font-weight:300;color:#000;letter-spacing:-.01em}.self-marking-overlay:not([data-anim-stage=ready]) .self-marking-header,.self-marking-overlay:not([data-anim-stage=ready]) .self-marking-nav{position:relative;z-index:20}.self-marking-overlay:not([data-anim-stage=intro]) .self-marking-header,.self-marking-overlay:not([data-anim-stage=intro]) .self-marking-nav{transform:translateY(0);opacity:1}[data-anim-stage=intro] .self-marking-header{animation:smHeaderSlideIn 1.2s ease both}[data-anim-stage=intro] .self-marking-nav{animation:smNavSlideIn 1.2s ease both}[data-anim-stage=intro] .sm-intro-title{animation:smTitleFadeIn .4s ease-out both}[data-anim-stage=intro] .self-marking-panels{opacity:0}[data-anim-stage=intro] .self-marking-left,[data-anim-stage=intro] .self-marking-right{opacity:0;transform:scale(.82)}[data-anim-stage=popping] .sm-intro-title{animation:smTitlePop .3s ease-out both}[data-anim-stage=popping] .self-marking-panels{opacity:0}[data-anim-stage=popping] .self-marking-left,[data-anim-stage=popping] .self-marking-right{opacity:0;transform:scale(.82)}[data-anim-stage=blank] .self-marking-panels{opacity:0}[data-anim-stage=blank] .self-marking-left,[data-anim-stage=blank] .self-marking-right{opacity:0;transform:scale(.82)}[data-anim-stage=fading] .sm-intro-curtain{animation:smCurtainFadeOut .6s ease-out both}[data-anim-stage=fading] .self-marking-panels{opacity:1}[data-anim-stage=fading] .self-marking-left{animation:smPanelSwellIn .8s cubic-bezier(.22,1,.36,1) both}[data-anim-stage=fading] .self-marking-right{animation:smPanelSwellIn .8s cubic-bezier(.22,1,.36,1) .15s both}[data-anim-stage=ready] .self-marking-panels{opacity:1}[data-anim-stage=ready] .self-marking-left,[data-anim-stage=ready] .self-marking-right{transform:scale(1);opacity:1}.self-marking-header{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:clamp(.75rem,2vw,1rem) clamp(1rem,3vw,1.75rem);background:var(--bg-body);border-bottom:1px solid var(--border-default);flex-shrink:0;box-shadow:var(--shadow-sm)}.self-marking-header-left{justify-self:start}.self-marking-header-center{justify-self:center}.self-marking-header-right{justify-self:end}.self-marking-save-exit{padding:.4rem .9rem;font-size:.82rem;font-weight:600;border:1.5px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text-secondary);cursor:pointer;transition:background .15s,color .15s,border-color .15s}.self-marking-save-exit:hover{background:var(--accent-blue);color:#fff;border-color:var(--accent-blue)}.self-marking-title{position:relative;display:flex;align-items:center;justify-content:center;font-size:1.3rem;font-weight:800;letter-spacing:-.02em}.self-marking-title-text{color:var(--accent-blue);font-family:Merriweather,Georgia,Times New Roman,serif;font-weight:700}.auto-marked-header .self-marking-title-text{color:var(--color-correct)}.self-mark-badge{position:absolute;left:calc(100% + 8px);top:50%;transform:translateY(-50%);white-space:nowrap;padding:3px 10px;border-radius:999px;font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.05em;margin-left:10px}.self-mark-badge.badge-action{background:var(--color-partial-bg);color:var(--color-partial-text);border:1px solid var(--color-partial-border)}.self-marking-question-label{font-size:1rem;font-weight:700;color:var(--text-tertiary)}.self-marking-counter{font-size:.88rem;font-weight:600;color:var(--text-secondary)}.self-marking-report-btn{margin:0;padding:4px 12px;font-size:.8rem;font-weight:700;border-radius:999px}.self-marking-panels{flex:1;display:grid;grid-template-columns:1fr 1fr;gap:clamp(.75rem,2vw,1.25rem);padding:clamp(.75rem,2vw,1.25rem);overflow:hidden}.self-marking-left,.self-marking-right{display:flex;flex-direction:column;padding:0 clamp(1rem,3vw,1.75rem);overflow:hidden;border:1.5px solid 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button:disabled{opacity:.5;cursor:not-allowed}.calc-btn-layout .calc-btn-operator{color:var(--accent-blue);font-weight:800}.calc-btn-layout .calc-btn-symbol{font-style:italic;color:var(--accent-blue)}.calc-btn-layout .calc-btn-symbol-greek{font-style:italic;color:#8b5e9b}[data-theme=dark] .calc-btn-layout .calc-btn-symbol{color:#7b8fd4}[data-theme=dark] .calc-btn-layout .calc-btn-symbol-greek{color:#b48cc4}.calc-steps-container{display:flex;flex-direction:column;gap:8px}.calc-step-row{display:flex;align-items:center;gap:8px}.calc-step-label{font-size:.8rem;font-weight:600;color:var(--text-tertiary);min-width:48px;flex-shrink:0}.calc-step-input{flex:1;padding:8px 12px;font-family:inherit;font-size:1rem;color:var(--text-primary);background:var(--bg-input);border:2px solid var(--border-input);border-radius:8px;transition:border-color .2s,box-shadow .2s}.calc-step-input:focus{outline:none;border-color:var(--accent-blue);background:var(--bg-input-focus);box-shadow:0 0 0 3px 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h2{color:var(--accent-blue);margin-bottom:25px;text-align:center;font-size:1.25rem;font-weight:800}.feedback-question{margin-bottom:20px}.feedback-question label{display:block;font-weight:600;color:var(--text-primary);margin-bottom:8px}.rating-dropdown{width:100%;padding:12px;font-size:1rem;border:2px solid var(--border-input);border-radius:8px;cursor:pointer;background:var(--bg-input);color:var(--text-primary)}.rating-dropdown:focus{outline:none;border-color:var(--border-input-focus)}.rating-dropdown option{background:var(--bg-surface);color:var(--text-primary)}.feedback-question textarea{width:100%;padding:12px;font-size:1rem;font-family:inherit;border:2px solid var(--border-input);border-radius:8px;resize:vertical;min-height:100px;background:var(--bg-input);color:var(--text-primary)}.feedback-question textarea:focus{outline:none;border-color:var(--border-input-focus)}.feedback-question textarea::placeholder{color:var(--text-tertiary)}.feedback-buttons{display:flex;gap:15px;margin-top:25px}.feedback-submit-btn{flex:1;padding:12px 20px;font-size:1rem;font-weight:700;background:var(--accent-blue);color:var(--text-on-accent);border:1.5px solid rgba(0,0,0,.15);border-radius:999px;cursor:pointer;box-shadow:2px 2px #0000004d;transition:transform .12s,box-shadow .12s,background .15s}.feedback-submit-btn:hover{background:var(--accent-blue-hover)}.feedback-submit-btn:active{transform:translate(1px,1px);box-shadow:none}.feedback-skip-btn{flex:1;padding:12px 20px;font-size:1rem;font-weight:600;background:var(--bg-surface-alt);color:var(--text-secondary);border:1.5px solid var(--edge);border-radius:999px;cursor:pointer;box-shadow:var(--press-shadow-sm);transition:transform .12s,box-shadow .12s,background 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var(--border-input);border-radius:8px;cursor:pointer;background:var(--bg-input);color:var(--text-primary)}.bugreport-field select:focus{outline:none;border-color:var(--border-input-focus)}.bugreport-field select option{background:var(--bg-surface);color:var(--text-primary)}.bugreport-field textarea{width:100%;padding:12px;font-size:1rem;font-family:inherit;border:2px solid var(--border-input);border-radius:8px;resize:vertical;min-height:100px;background:var(--bg-input);color:var(--text-primary)}.bugreport-field textarea:focus{outline:none;border-color:var(--border-input-focus)}.bugreport-field textarea::placeholder{color:var(--text-tertiary)}.bugreport-buttons{display:flex;gap:15px;margin-top:25px}.bugreport-submit-btn{flex:1;padding:12px 20px;font-size:1rem;font-weight:700;background:var(--color-incorrect);color:var(--text-on-accent);border:1.5px solid rgba(0,0,0,.15);border-radius:999px;cursor:pointer;box-shadow:2px 2px #0000004d;transition:transform .12s,box-shadow .12s,background .15s}.bugreport-submit-btn:hover{background:var(--color-incorrect-border)}.bugreport-submit-btn:active{transform:translate(1px,1px);box-shadow:none}.bugreport-submit-btn:disabled{opacity:.5;cursor:not-allowed}.bugreport-cancel-btn{flex:1;padding:12px 20px;font-size:1rem;font-weight:600;background:var(--bg-surface-alt);color:var(--text-secondary);border:1.5px solid var(--edge);border-radius:999px;cursor:pointer;box-shadow:var(--press-shadow-sm);transition:transform .12s,box-shadow .12s,background .15s}.bugreport-cancel-btn:hover{background:var(--bg-surface-raised)}.bugreport-cancel-btn:active{transform:translate(1px,1px);box-shadow:none}#landing-page{display:none;min-height:80vh}#landing-page.active{display:flex;justify-content:center;align-items:center}.landing-content{text-align:center;max-width:700px;width:100%;margin:0 auto;transition:transform .6s ease}.landing-content.slid-up{transform:translateY(-20px)}.landing-title{font-size:clamp(2.6rem,7.8vw,4.55rem);font-weight:800;color:var(--accent-blue);letter-spacing:-.04em;margin-bottom:clamp(.75rem,2vw,1rem);line-height:1.05}.landing-strapline{font-size:1.5rem;color:var(--text-secondary);margin-bottom:clamp(1.5rem,4vw,2rem);line-height:1.6;opacity:0;transition:opacity .8s ease}.landing-strapline.fade-in{opacity:1}.landing-select-label{font-size:.85rem;font-weight:800;text-transform:uppercase;letter-spacing:.1em;color:var(--text-tertiary);margin-bottom:16px;opacity:0;transition:opacity .8s ease}.landing-select-label.fade-in{opacity:1}.landing-subjects{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;margin-bottom:clamp(2rem,6vw,3.75rem);opacity:0;transition:opacity .8s ease}.landing-subjects.fade-in{opacity:1}.landing-cta-btn{font-size:1.3rem;font-weight:700;color:var(--text-on-accent);background:var(--accent-blue);border:1.5px solid var(--edge);padding:14px 48px;border-radius:999px;cursor:pointer;letter-spacing:.01em;box-shadow:var(--press-shadow-sm);transition:transform .12s ease,box-shadow .12s ease,background .15s;-webkit-user-select:none;user-select:none;touch-action:manipulation}.landing-cta-btn:hover{background:var(--accent-blue-hover);transform:translate(2px,2px);box-shadow:none}.landing-cta-btn:active{transform:translate(2px,2px);box-shadow:none}body.landing-active header{display:none}.landing-features{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:clamp(.75rem,2vw,1.25rem);max-width:700px;margin:0 auto;opacity:0;transition:opacity .8s ease}.landing-features.fade-in{opacity:1}.landing-feature-card{background:var(--bg-surface);border:1.5px solid var(--edge);border-radius:var(--press-radius);padding:.625rem .75rem;text-align:left;box-shadow:var(--press-shadow-sm);transition:transform .12s,box-shadow 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