*,:before,:after{box-sizing:border-box;border-width:0;border-style:solid;border-color:#e5e7eb}:before,:after{--tw-content: ""}html,:host{line-height:1.5;-webkit-text-size-adjust:100%;-moz-tab-size:4;-o-tab-size:4;tab-size:4;font-family:ui-sans-serif,system-ui,sans-serif,"Apple Color Emoji","Segoe UI Emoji",Segoe UI Symbol,"Noto Color Emoji";font-feature-settings:normal;font-variation-settings:normal;-webkit-tap-highlight-color:transparent}body{margin:0;line-height:inherit}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-feature-settings:normal;font-variation-settings:normal;font-size:1em}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}button,input,optgroup,select,textarea{font-family:inherit;font-feature-settings:inherit;font-variation-settings:inherit;font-size:100%;font-weight:inherit;line-height:inherit;color:inherit;margin:0;padding:0}button,select{text-transform:none}button,[type=button],[type=reset],[type=submit]{-webkit-appearance:button;background-color:transparent;background-image:none}:-moz-focusring{outline:auto}:-moz-ui-invalid{box-shadow:none}progress{vertical-align:baseline}::-webkit-inner-spin-button,::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}summary{display:list-item}blockquote,dl,dd,h1,h2,h3,h4,h5,h6,hr,figure,p,pre{margin:0}fieldset{margin:0;padding:0}legend{padding:0}ol,ul,menu{list-style:none;margin:0;padding:0}dialog{padding:0}textarea{resize:vertical}input::-moz-placeholder,textarea::-moz-placeholder{opacity:1;color:#9ca3af}input::placeholder,textarea::placeholder{opacity:1;color:#9ca3af}button,[role=button]{cursor:pointer}:disabled{cursor:default}img,svg,video,canvas,audio,iframe,embed,object{display:block;vertical-align:middle}img,video{max-width:100%;height:auto}[hidden]{display:none}*,:before,:after{--tw-border-spacing-x: 0;--tw-border-spacing-y: 0;--tw-translate-x: 0;--tw-translate-y: 0;--tw-rotate: 0;--tw-skew-x: 0;--tw-skew-y: 0;--tw-scale-x: 1;--tw-scale-y: 1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness: proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width: 0px;--tw-ring-offset-color: #fff;--tw-ring-color: rgb(59 130 246 / .5);--tw-ring-offset-shadow: 0 0 #0000;--tw-ring-shadow: 0 0 #0000;--tw-shadow: 0 0 #0000;--tw-shadow-colored: 0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: }::backdrop{--tw-border-spacing-x: 0;--tw-border-spacing-y: 0;--tw-translate-x: 0;--tw-translate-y: 0;--tw-rotate: 0;--tw-skew-x: 0;--tw-skew-y: 0;--tw-scale-x: 1;--tw-scale-y: 1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness: proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width: 0px;--tw-ring-offset-color: #fff;--tw-ring-color: rgb(59 130 246 / .5);--tw-ring-offset-shadow: 0 0 #0000;--tw-ring-shadow: 0 0 #0000;--tw-shadow: 0 0 #0000;--tw-shadow-colored: 0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: }.fixed{position:fixed}.absolute{position:absolute}.relative{position:relative}.inset-0{inset:0}.-right-4{right:-1rem}.-top-4{top:-1rem}.left-5{left:1.25rem}.right-\[35px\]{right:35px}.top-5{top:1.25rem}.top-\[15px\]{top:15px}.z-10{z-index:10}.z-50{z-index:50}.z-\[1000\]{z-index:1000}.z-\[2\]{z-index:2}.my-10{margin-top:2.5rem;margin-bottom:2.5rem}.my-4{margin-top:1rem;margin-bottom:1rem}.my-5{margin-top:1.25rem;margin-bottom:1.25rem}.my-8{margin-top:2rem;margin-bottom:2rem}.mb-10{margin-bottom:2.5rem}.mb-2{margin-bottom:.5rem}.mb-4{margin-bottom:1rem}.mb-5{margin-bottom:1.25rem}.mb-8{margin-bottom:2rem}.ml-0{margin-left:0}.mr-5{margin-right:1.25rem}.mt-1{margin-top:.25rem}.mt-3{margin-top:.75rem}.mt-4{margin-top:1rem}.mt-8{margin-top:2rem}.block{display:block}.flex{display:flex}.grid{display:grid}.hidden{display:none}.h-10{height:2.5rem}.h-7{height:1.75rem}.h-auto{height:auto}.h-screen{height:100vh}.max-h-\[80vh\]{max-height:80vh}.max-h-screen{max-height:100vh}.min-h-screen{min-height:100vh}.w-7{width:1.75rem}.w-full{width:100%}.min-w-\[120px\]{min-width:120px}.min-w-\[40px\]{min-width:40px}.max-w-4xl{max-width:56rem}.max-w-\[200px\]{max-width:200px}.max-w-full{max-width:100%}.flex-1{flex:1 1 0%}.flex-shrink-0{flex-shrink:0}.-translate-x-full{--tw-translate-x: -100%;transform:translate(var(--tw-translate-x),var(--tw-translate-y)) rotate(var(--tw-rotate)) skew(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))}.scale-105{--tw-scale-x: 1.05;--tw-scale-y: 1.05;transform:translate(var(--tw-translate-x),var(--tw-translate-y)) rotate(var(--tw-rotate)) skew(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))}.transform{transform:translate(var(--tw-translate-x),var(--tw-translate-y)) rotate(var(--tw-rotate)) skew(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))}.cursor-pointer{cursor:pointer}.grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.flex-col{flex-direction:column}.flex-wrap{flex-wrap:wrap}.items-start{align-items:flex-start}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-0{gap:0px}.gap-10{gap:2.5rem}.gap-2{gap:.5rem}.gap-3{gap:.75rem}.gap-4{gap:1rem}.gap-\[30px\]{gap:30px}.overflow-y-auto{overflow-y:auto}.rounded-2xl{border-radius:1rem}.rounded-3xl{border-radius:1.5rem}.rounded-full{border-radius:9999px}.rounded-lg{border-radius:.5rem}.rounded-xl{border-radius:.75rem}.border{border-width:1px}.border-2{border-width:2px}.border-b{border-bottom-width:1px}.border-l-4{border-left-width:4px}.border-dashed{border-style:dashed}.border-none{border-style:none}.border-blue-200{--tw-border-opacity: 1;border-color:rgb(191 219 254 / var(--tw-border-opacity))}.border-blue-400{--tw-border-opacity: 1;border-color:rgb(96 165 250 / var(--tw-border-opacity))}.border-green-400{--tw-border-opacity: 1;border-color:rgb(74 222 128 / var(--tw-border-opacity))}.border-green-500{--tw-border-opacity: 1;border-color:rgb(34 197 94 / var(--tw-border-opacity))}.border-red-500{--tw-border-opacity: 1;border-color:rgb(239 68 68 / var(--tw-border-opacity))}.border-white\/20{border-color:#fff3}.border-white\/30{border-color:#ffffff4d}.bg-black\/80{background-color:#000c}.bg-blue-400\/10{background-color:#60a5fa1a}.bg-blue-50{--tw-bg-opacity: 1;background-color:rgb(239 246 255 / var(--tw-bg-opacity))}.bg-green-500\/30{background-color:#22c55e4d}.bg-white\/30{background-color:#ffffff4d}.bg-white\/90{background-color:#ffffffe6}.bg-gradient-to-r{background-image:linear-gradient(to right,var(--tw-gradient-stops))}.from-blue-400{--tw-gradient-from: #60a5fa var(--tw-gradient-from-position);--tw-gradient-to: rgb(96 165 250 / 0) var(--tw-gradient-to-position);--tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to)}.from-blue-50{--tw-gradient-from: #eff6ff var(--tw-gradient-from-position);--tw-gradient-to: rgb(239 246 255 / 0) var(--tw-gradient-to-position);--tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to)}.from-green-100{--tw-gradient-from: #dcfce7 var(--tw-gradient-from-position);--tw-gradient-to: rgb(220 252 231 / 0) var(--tw-gradient-to-position);--tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to)}.from-green-500{--tw-gradient-from: #22c55e var(--tw-gradient-from-position);--tw-gradient-to: rgb(34 197 94 / 0) var(--tw-gradient-to-position);--tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to)}.from-purple-500{--tw-gradient-from: #a855f7 var(--tw-gradient-from-position);--tw-gradient-to: rgb(168 85 247 / 0) var(--tw-gradient-to-position);--tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to)}.from-red-100{--tw-gradient-from: #fee2e2 var(--tw-gradient-from-position);--tw-gradient-to: rgb(254 226 226 / 0) var(--tw-gradient-to-position);--tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to)}.from-red-500{--tw-gradient-from: #ef4444 var(--tw-gradient-from-position);--tw-gradient-to: rgb(239 68 68 / 0) var(--tw-gradient-to-position);--tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to)}.to-blue-100{--tw-gradient-to: #dbeafe var(--tw-gradient-to-position)}.to-cyan-400{--tw-gradient-to: #22d3ee var(--tw-gradient-to-position)}.to-green-200{--tw-gradient-to: #bbf7d0 var(--tw-gradient-to-position)}.to-green-600{--tw-gradient-to: #16a34a var(--tw-gradient-to-position)}.to-purple-700{--tw-gradient-to: #7e22ce var(--tw-gradient-to-position)}.to-red-200{--tw-gradient-to: #fecaca var(--tw-gradient-to-position)}.to-red-600{--tw-gradient-to: #dc2626 var(--tw-gradient-to-position)}.bg-clip-text{-webkit-background-clip:text;background-clip:text}.p-12{padding:3rem}.p-2{padding:.5rem}.p-2\.5{padding:.625rem}.p-3{padding:.75rem}.p-4{padding:1rem}.p-5{padding:1.25rem}.p-8{padding:2rem}.px-10{padding-left:2.5rem;padding-right:2.5rem}.px-12{padding-left:3rem;padding-right:3rem}.py-20{padding-top:5rem;padding-bottom:5rem}.py-5{padding-top:1.25rem;padding-bottom:1.25rem}.py-8{padding-top:2rem;padding-bottom:2rem}.pb-5{padding-bottom:1.25rem}.text-center{text-align:center}.text-2xl{font-size:1.5rem;line-height:2rem}.text-3xl{font-size:1.875rem;line-height:2.25rem}.text-4xl{font-size:2.25rem;line-height:2.5rem}.text-5xl{font-size:3rem;line-height:1}.text-6xl{font-size:3.75rem;line-height:1}.text-lg{font-size:1.125rem;line-height:1.75rem}.text-sm{font-size:.875rem;line-height:1.25rem}.text-xl{font-size:1.25rem;line-height:1.75rem}.font-bold{font-weight:700}.font-medium{font-weight:500}.font-semibold{font-weight:600}.leading-relaxed{line-height:1.625}.text-blue-400{--tw-text-opacity: 1;color:rgb(96 165 250 / var(--tw-text-opacity))}.text-gray-600{--tw-text-opacity: 1;color:rgb(75 85 99 / var(--tw-text-opacity))}.text-gray-800{--tw-text-opacity: 1;color:rgb(31 41 55 / var(--tw-text-opacity))}.text-green-800{--tw-text-opacity: 1;color:rgb(22 101 52 / var(--tw-text-opacity))}.text-red-800{--tw-text-opacity: 1;color:rgb(153 27 27 / var(--tw-text-opacity))}.text-transparent{color:transparent}.text-white{--tw-text-opacity: 1;color:rgb(255 255 255 / var(--tw-text-opacity))}.text-white\/70{color:#ffffffb3}.text-white\/80{color:#fffc}.opacity-70{opacity:.7}.opacity-80{opacity:.8}.opacity-90{opacity:.9}.shadow-lg{--tw-shadow: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--tw-shadow-colored: 0 10px 15px -3px var(--tw-shadow-color), 0 4px 6px -4px var(--tw-shadow-color);box-shadow:var(--tw-ring-offset-shadow, 0 0 #0000),var(--tw-ring-shadow, 0 0 #0000),var(--tw-shadow)}.shadow-xl{--tw-shadow: 0 20px 25px -5px rgb(0 0 0 / .1), 0 8px 10px -6px rgb(0 0 0 / .1);--tw-shadow-colored: 0 20px 25px -5px var(--tw-shadow-color), 0 8px 10px -6px var(--tw-shadow-color);box-shadow:var(--tw-ring-offset-shadow, 0 0 #0000),var(--tw-ring-shadow, 0 0 #0000),var(--tw-shadow)}.shadow-blue-400\/30{--tw-shadow-color: rgb(96 165 250 / .3);--tw-shadow: var(--tw-shadow-colored)}.shadow-blue-400\/40{--tw-shadow-color: rgb(96 165 250 / .4);--tw-shadow: var(--tw-shadow-colored)}.shadow-blue-400\/50{--tw-shadow-color: rgb(96 165 250 / .5);--tw-shadow: var(--tw-shadow-colored)}.drop-shadow-lg{--tw-drop-shadow: drop-shadow(0 10px 8px rgb(0 0 0 / .04)) drop-shadow(0 4px 3px rgb(0 0 0 / .1));filter:var(--tw-blur) var(--tw-brightness) var(--tw-contrast) var(--tw-grayscale) var(--tw-hue-rotate) var(--tw-invert) var(--tw-saturate) var(--tw-sepia) var(--tw-drop-shadow)}.filter{filter:var(--tw-blur) var(--tw-brightness) var(--tw-contrast) var(--tw-grayscale) var(--tw-hue-rotate) var(--tw-invert) var(--tw-saturate) var(--tw-sepia) var(--tw-drop-shadow)}.transition-all{transition-property:all;transition-timing-function:cubic-bezier(.4,0,.2,1);transition-duration:.15s}.transition-transform{transition-property:transform;transition-timing-function:cubic-bezier(.4,0,.2,1);transition-duration:.15s}.duration-300{transition-duration:.3s}.ease-in-out{transition-timing-function:cubic-bezier(.4,0,.2,1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:#0f0f23;background-image:radial-gradient(circle at 25% 25%,#1e3c72 0%,transparent 50%),radial-gradient(circle at 75% 75%,#2a5298 0%,transparent 50%),radial-gradient(circle at 50% 50%,#667eea 0%,transparent 70%);background-size:100% 100%;min-height:100vh;position:relative;overflow-x:hidden}body:before{content:"";position:fixed;top:0;left:0;width:100%;height:100%;background:linear-gradient(90deg,transparent 79px,rgba(255,255,255,.03) 81px,transparent 82px),linear-gradient(transparent 79px,rgba(255,255,255,.03) 81px,transparent 82px);background-size:80px 80px;pointer-events:none;z-index:1}.sidebar{width:280px;background:#ffffff1a;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-right:1px solid rgba(255,255,255,.2);padding:20px;position:fixed;height:100vh;overflow-y:auto;transition:transform .3s ease}.sidebar-header{text-align:center;margin-bottom:30px;padding:20px 0;border-bottom:1px solid rgba(255,255,255,.2)}.sidebar-header h2{color:#fff;font-size:1.4em;margin-bottom:8px;text-shadow:0 2px 10px rgba(0,0,0,.3)}.sidebar-header p{color:#fffc;font-size:.9em}.file-import-section{margin-bottom:30px;padding:20px;background:#ffffff1a;border-radius:15px;border:1px solid rgba(255,255,255,.2)}.file-import-section h3{color:#fff;margin-bottom:15px;font-size:1.1em}.file-input-label{display:block;padding:12px 20px;background:linear-gradient(135deg,#4facfe,#00f2fe);color:#fff;border-radius:10px;cursor:pointer;text-align:center;font-weight:600;transition:all .3s ease}.file-input-label:hover{transform:translateY(-2px);box-shadow:0 5px 15px #4facfe66}.question-nav{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:30px}.question-nav-item{background:#ffffff1a;border:2px solid rgba(255,255,255,.2);border-radius:12px;padding:12px;cursor:pointer;transition:all .3s ease;color:#fff;text-align:center;font-weight:600;position:relative;overflow:hidden}.question-nav-item:hover{background:#4facfe4d;border-color:#4facfe;transform:translateY(-2px);box-shadow:0 5px 15px #4facfe4d}.question-nav-item.answered{background:#56c5964d;border-color:#56c596}.question-nav-item.current{background:linear-gradient(135deg,#4facfe,#00f2fe);border-color:#4facfe;box-shadow:0 0 20px #4facfe80}.progress-summary{background:#ffffff1a;border-radius:15px;padding:20px;color:#fff;text-align:center}.progress-summary h3{margin-bottom:15px;color:#4facfe}.progress-stats{display:flex;justify-content:space-between;margin-bottom:15px}.stat-number{font-size:1.5em;font-weight:700;color:#4facfe}.stat-label{font-size:.8em;opacity:.8}.welcome-screen{text-align:center;padding:100px 40px;color:#fff}.welcome-screen h1{font-size:3em;margin-bottom:20px;background:linear-gradient(135deg,#4facfe,#00f2fe);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.welcome-screen p{font-size:1.2em;margin-bottom:40px;opacity:.9}.upload-area{border:3px dashed rgba(255,255,255,.3);border-radius:20px;padding:60px;margin:40px 0;transition:all .3s ease;cursor:pointer}.upload-area:hover{border-color:#4facfe;background:#4facfe1a}.upload-area.dragover{border-color:#00f2fe;background:#00f2fe1a;transform:scale(1.02)}.upload-icon{font-size:4em;margin-bottom:20px;opacity:.7}.header{background:linear-gradient(135deg,#4facfe,#00f2fe);border-radius:20px;padding:40px;text-align:center;color:#fff;margin-bottom:40px;position:relative;overflow:hidden;box-shadow:0 20px 40px #0003}.header h1{font-size:2.5em;font-weight:700;margin-bottom:10px;text-shadow:0 4px 15px rgba(0,0,0,.3)}.header p{font-size:1.2em;opacity:.9}.question-card{background:#fffffff2;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:20px;padding:35px;box-shadow:0 15px 35px #0000001a;border:1px solid rgba(255,255,255,.2);transition:all .3s ease;scroll-margin-top:100px}.question-card:hover{transform:translateY(-5px);box-shadow:0 25px 50px #00000026}.question-header{display:flex;align-items:flex-start;margin-bottom:20px;gap:15px}.question-number{background:linear-gradient(135deg,#4facfe,#00f2fe);color:#fff;min-width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;box-shadow:0 5px 15px #4facfe4d;flex-shrink:0}.question-content{flex:1}.question-text{font-size:1.3em;color:#333;line-height:1.6;font-weight:500;margin-bottom:20px}.question-image{max-width:100%;height:auto;border-radius:12px;margin:15px 0;box-shadow:0 8px 20px #0000001a;cursor:pointer;transition:transform .3s ease}.question-image:hover{transform:scale(1.02)}.option{background:#f8f9ff;border:2px solid #e0e6ff;border-radius:15px;padding:20px 25px;cursor:pointer;transition:all .3s ease;display:flex;align-items:flex-start;position:relative;overflow:hidden;margin-bottom:15px}.option:hover{background:#e8f1ff;border-color:#4facfe;transform:translate(5px);box-shadow:0 8px 20px #4facfe33}.option.selected{background:linear-gradient(135deg,#4facfe,#00f2fe);border-color:#4facfe;color:#fff;transform:scale(1.02);box-shadow:0 15px 30px #4facfe66}.option.correct{background:linear-gradient(135deg,#56c596,#39d87a);border-color:#56c596;color:#fff}.option.incorrect{background:linear-gradient(135deg,#ff6b6b,#ee5a5a);border-color:#ff6b6b;color:#fff}.option-letter{font-weight:700;margin-right:20px;width:30px;height:30px;border-radius:50%;background:#4facfe1a;display:flex;align-items:center;justify-content:center;font-size:.9em;transition:all .3s ease;flex-shrink:0}.option.selected .option-letter,.option.correct .option-letter,.option.incorrect .option-letter{background:#ffffff4d;color:#fff}.option-content{flex:1;display:flex;flex-direction:column;gap:10px}.option-text{line-height:1.4}.option-image{max-width:200px;height:auto;border-radius:8px;cursor:pointer;transition:transform .3s ease}.option-image:hover{transform:scale(1.05)}.feedback{margin-top:15px;padding:20px;border-radius:12px;font-weight:500;opacity:0;transform:translateY(10px);transition:all .4s ease}.feedback.show{opacity:1;transform:translateY(0)}.feedback.correct{background:linear-gradient(135deg,#d4edda,#c3e6cb);color:#155724;border-left:5px solid #28a745}.feedback.incorrect{background:linear-gradient(135deg,#f8d7da,#f5c6cb);color:#721c24;border-left:5px solid #dc3545}.explanation-image{max-width:100%;height:auto;border-radius:8px;margin:10px 0;cursor:pointer;transition:transform .3s ease}.explanation-image:hover{transform:scale(1.02)}.submit-section{text-align:center;margin-top:50px;padding:40px;background:#ffffff1a;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:20px;border:1px solid rgba(255,255,255,.2)}.submit-btn{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:20px 50px;border-radius:50px;font-size:1.3em;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:0 10px 30px #667eea4d}.submit-btn:hover{transform:translateY(-3px);box-shadow:0 15px 40px #667eea66}.results{text-align:center;padding:50px;background:#fffffff2;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:20px;margin-top:30px;border:1px solid rgba(255,255,255,.2)}.score{font-size:5em;font-weight:700;background:linear-gradient(135deg,#4facfe,#00f2fe);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:20px;animation:scoreAppear 1s ease-out}@keyframes scoreAppear{0%{transform:scale(0) rotate(180deg);opacity:0}to{transform:scale(1) rotate(0);opacity:1}}.score-details{display:flex;justify-content:center;gap:40px;margin:30px 0;flex-wrap:wrap}.score-item{text-align:center;padding:20px;background:linear-gradient(135deg,#f8f9ff,#e8f1ff);border-radius:15px;border:2px solid #e0e6ff;min-width:120px}.score-item-number{font-size:2em;font-weight:700;color:#4facfe}.score-item-label{color:#666;font-size:.9em;margin-top:5px}.error-message{background:linear-gradient(135deg,#ff6b6b,#ee5a5a);color:#fff;padding:15px;border-radius:10px;margin:20px 0;text-align:center}@media (max-width: 768px){.sidebar{transform:translate(-100%);z-index:999;width:90%;max-width:320px}.sidebar.open{transform:translate(0)}.welcome-screen h1{font-size:2.2em}.question-card{padding:25px}.score-details{flex-direction:column;gap:20px;align-items:center}.score-item{width:100%;max-width:200px}.question-header{flex-direction:column;align-items:flex-start}.question-number{margin-bottom:15px;align-self:flex-start}.upload-area{padding:40px 20px}.upload-icon{font-size:3em}.option-image{max-width:150px}}@media (max-width: 480px){.header{padding:25px}.header h1{font-size:1.8em}.welcome-screen{padding:50px 20px}.welcome-screen h1{font-size:1.8em}.question-card{padding:20px}.option{padding:15px 20px}.score{font-size:3.5em}.option-image{max-width:120px}}.quiz-grid{display:grid;grid-template-columns:1fr;gap:15px;max-height:300px;overflow-y:auto}.quiz-item{background:#ffffff1a;border:2px solid rgba(255,255,255,.2);border-radius:12px;padding:15px;cursor:pointer;transition:all .3s ease;color:#fff}.quiz-item:hover{background:#4facfe4d;border-color:#4facfe;transform:translateY(-2px);box-shadow:0 5px 15px #4facfe4d}.quiz-item-header{display:flex;align-items:center;gap:10px;margin-bottom:8px}.quiz-icon{font-size:1.2em}.quiz-title{font-weight:600;font-size:.95em}.quiz-description{font-size:.8em;opacity:.8;margin-bottom:8px;line-height:1.3}.quiz-meta{display:flex;justify-content:space-between;font-size:.7em;opacity:.7}.quiz-category{background:#4facfe4d;padding:2px 8px;border-radius:10px;font-size:.7em}.loading-spinner{display:flex;justify-content:center;align-items:center;padding:20px;color:#fff}@media (max-width: 768px){.quiz-grid{max-height:200px}}.welcome-quiz-library{margin:40px auto;max-width:800px;padding:30px;background:#ffffff1a;border-radius:20px;border:1px solid rgba(255,255,255,.2);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px)}.welcome-quiz-library h2{color:#fff;margin-bottom:20px;font-size:1.8em;text-align:center;background:linear-gradient(135deg,#4facfe,#00f2fe);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.welcome-quiz-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}.welcome-quiz-item{background:#ffffff1a;border:2px solid rgba(255,255,255,.2);border-radius:15px;padding:25px;cursor:pointer;transition:all .3s ease;color:#fff;position:relative;overflow:hidden}.welcome-quiz-item:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.1),transparent);transition:left .5s ease}.welcome-quiz-item:hover{background:#4facfe33;border-color:#4facfe;transform:translateY(-5px);box-shadow:0 15px 35px #4facfe4d}.welcome-quiz-item:hover:before{left:100%}.welcome-quiz-item-header{display:flex;align-items:center;gap:15px;margin-bottom:15px}.welcome-quiz-icon{font-size:2em;background:linear-gradient(135deg,#4facfe,#00f2fe);padding:10px;border-radius:12px;min-width:60px;text-align:center;box-shadow:0 5px 15px #4facfe4d}.welcome-quiz-title{font-weight:700;font-size:1.3em;margin:0;text-shadow:0 2px 10px rgba(0,0,0,.3)}.welcome-quiz-description{font-size:1em;opacity:.9;margin-bottom:20px;line-height:1.5}.welcome-quiz-meta{display:flex;justify-content:space-between;align-items:center;gap:15px;font-size:.9em;flex-wrap:wrap}.welcome-quiz-category{background:linear-gradient(135deg,#4facfe,#00f2fe);padding:6px 14px;border-radius:20px;font-size:.85em;font-weight:600;text-shadow:none;box-shadow:0 4px 10px #4facfe4d}.welcome-quiz-stats{display:flex;gap:15px;opacity:.8}.welcome-loading-spinner{display:flex;justify-content:center;align-items:center;padding:40px;color:#fff;font-size:1.2em}.welcome-loading-spinner:before{content:"";width:30px;height:30px;border:3px solid rgba(255,255,255,.3);border-top:3px solid #4facfe;border-radius:50%;animation:spin 1s linear infinite;margin-right:15px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.divider{margin:40px auto;max-width:600px;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);position:relative}.divider:after{content:"OR";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:#0f0f23;color:#ffffffb3;padding:0 20px;font-weight:600}@media (max-width: 768px){.welcome-quiz-library{margin:30px 20px;padding:20px}.welcome-quiz-grid{grid-template-columns:1fr;gap:15px}.welcome-quiz-item{padding:20px}.welcome-quiz-icon{font-size:1.5em;min-width:50px;padding:8px}.welcome-quiz-title{font-size:1.1em}.welcome-quiz-meta{flex-direction:column;align-items:flex-start;gap:10px}.welcome-quiz-stats{gap:10px}}@media (max-width: 480px){.welcome-quiz-library{margin:20px 10px;padding:15px}.welcome-quiz-item-header{flex-direction:column;text-align:center;gap:10px}.welcome-quiz-icon{align-self:center}}.hover\:-translate-y-1:hover{--tw-translate-y: -.25rem;transform:translate(var(--tw-translate-x),var(--tw-translate-y)) rotate(var(--tw-rotate)) skew(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))}.hover\:-translate-y-2:hover{--tw-translate-y: -.5rem;transform:translate(var(--tw-translate-x),var(--tw-translate-y)) rotate(var(--tw-rotate)) skew(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))}.hover\:translate-x-1:hover{--tw-translate-x: .25rem;transform:translate(var(--tw-translate-x),var(--tw-translate-y)) rotate(var(--tw-rotate)) skew(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))}.hover\:scale-105:hover{--tw-scale-x: 1.05;--tw-scale-y: 1.05;transform:translate(var(--tw-translate-x),var(--tw-translate-y)) rotate(var(--tw-rotate)) skew(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))}.hover\:border-blue-400:hover{--tw-border-opacity: 1;border-color:rgb(96 165 250 / var(--tw-border-opacity))}.hover\:bg-blue-100:hover{--tw-bg-opacity: 1;background-color:rgb(219 234 254 / var(--tw-bg-opacity))}.hover\:bg-blue-400\/10:hover{background-color:#60a5fa1a}.hover\:bg-blue-400\/30:hover{background-color:#60a5fa4d}.hover\:opacity-70:hover{opacity:.7}.hover\:shadow-2xl:hover{--tw-shadow: 0 25px 50px -12px rgb(0 0 0 / .25);--tw-shadow-colored: 0 25px 50px -12px var(--tw-shadow-color);box-shadow:var(--tw-ring-offset-shadow, 0 0 #0000),var(--tw-ring-shadow, 0 0 #0000),var(--tw-shadow)}.hover\:shadow-lg:hover{--tw-shadow: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--tw-shadow-colored: 0 10px 15px -3px var(--tw-shadow-color), 0 4px 6px -4px var(--tw-shadow-color);box-shadow:var(--tw-ring-offset-shadow, 0 0 #0000),var(--tw-ring-shadow, 0 0 #0000),var(--tw-shadow)}.hover\:shadow-xl:hover{--tw-shadow: 0 20px 25px -5px rgb(0 0 0 / .1), 0 8px 10px -6px rgb(0 0 0 / .1);--tw-shadow-colored: 0 20px 25px -5px var(--tw-shadow-color), 0 8px 10px -6px var(--tw-shadow-color);box-shadow:var(--tw-ring-offset-shadow, 0 0 #0000),var(--tw-ring-shadow, 0 0 #0000),var(--tw-shadow)}.hover\:shadow-blue-400\/20:hover{--tw-shadow-color: rgb(96 165 250 / .2);--tw-shadow: var(--tw-shadow-colored)}.hover\:shadow-blue-400\/30:hover{--tw-shadow-color: rgb(96 165 250 / .3);--tw-shadow: var(--tw-shadow-colored)}.hover\:shadow-purple-500\/40:hover{--tw-shadow-color: rgb(168 85 247 / .4);--tw-shadow: var(--tw-shadow-colored)}@media not all and (min-width: 768px){.max-md\:block{display:block}}@media (min-width: 768px){.md\:ml-\[280px\]{margin-left:280px}.md\:p-10{padding:2.5rem}}@media (min-width: 1024px){.lg\:translate-x-0{--tw-translate-x: 0px;transform:translate(var(--tw-translate-x),var(--tw-translate-y)) rotate(var(--tw-rotate)) skew(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))}}