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#3a3a3a;--sidebar-active-bg: rgba(77, 171, 247, .15);--sidebar-active-text: var(--primary-color);--code-bg: #000000;--code-text: #f8f8f2;--shadow-color: rgba(0, 0, 0, .3);--shadow-hover: rgba(77, 171, 247, .4);--success-color: #69db7c}*,*:before,*:after{box-sizing:border-box}body{font-family:var(--font-family);background-color:var(--bg-color);color:var(--text-color);margin:0;padding:2rem;min-height:100vh;transition:background-color .3s ease,color .3s ease}h1,h2,h3{font-weight:600;margin-top:0;color:var(--text-color)}hr{border:none;border-top:1px solid var(--border-color);margin:2rem 0}#root{max-width:1600px;margin:0 auto;animation:fadeIn .5s ease-in-out}.homepage-container h2{text-align:center;font-size:2rem;margin-bottom:2rem}.subjects-list{display:flex;flex-wrap:wrap;justify-content:center;gap:1rem}.subjects-list button{background-color:var(--card-bg);color:var(--primary-color);border:2px solid var(--primary-color);padding:10px 20px;border-radius:50px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease-in-out}.subjects-list button:hover,.subjects-list button.active{background-color:var(--primary-color);color:#fff;transform:translateY(-3px);box-shadow:0 4px 12px var(--shadow-hover)}[data-theme=dark] .subjects-list button:hover,[data-theme=dark] .subjects-list button.active{color:#121212}.topics-section{margin-top:2rem;animation:fadeIn .4s ease-in-out}.topics-section ul{list-style:none;padding:0}.topics-section li{background-color:var(--light-bg);padding:1rem;border-radius:8px;margin-bottom:1rem;box-shadow:0 1px 3px var(--shadow-color)}.topics-section li a{display:inline-block;margin-top:.5rem;font-weight:500;color:var(--primary-color);text-decoration:none}.data-management-section{background-color:var(--warning-bg);border:1px solid var(--warning-border);border-radius:8px;padding:16px;margin-bottom:24px}.data-management-section button{background-color:var(--warning-btn-bg);border:none;color:#212529;padding:8px 16px;border-radius:5px;cursor:pointer;transition:background-color .2s}.data-management-section button:hover{background-color:var(--warning-btn-hover)}.data-management-section div{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.quiz-page-layout{display:flex;align-items:flex-start;gap:24px}.quiz-nav-sidebar{width:80px;flex-shrink:0;position:sticky;top:2rem;height:calc(100vh - 5rem);overflow-y:auto;background-color:var(--light-bg);border-radius:8px;padding:10px;border:1px solid var(--border-color);z-index:100}.sidebar-backdrop,.sidebar-toggle-btn{display:none}.quiz-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;margin-bottom:10px;gap:10px}.header-left{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.header-left h3{margin:0;font-size:1.1rem}.navigation-buttons{display:flex;gap:10px;align-items:center;margin-top:0}.prev-button,.next-button,.home-button{padding:6px 12px;font-size:.9rem}.sidebar-list{display:flex;flex-direction:column;gap:4px}.sidebar-item{display:flex;justify-content:center;align-items:center;padding:4px 2px;text-decoration:none;color:var(--text-color);border-radius:5px;transition:background-color .2s;font-size:var(--item-font-size, .95rem);flex-wrap:wrap;box-sizing:border-box;text-align:center;min-height:40px}.sidebar-item:hover{background-color:var(--sidebar-hover)}.sidebar-item.active{background-color:var(--sidebar-active-bg);color:var(--sidebar-active-text);font-weight:600}.sidebar-item-content,.sidebar-tags-wrapper{display:contents}.sidebar-item .emoji-tag{font-size:1.2em;line-height:1;filter:drop-shadow(0 0 1px rgba(0,0,0,.1));transition:transform .2s;margin-right:1px}.question-number{margin-right:3px}[data-theme=dark] .sidebar-item .emoji-tag{filter:drop-shadow(0 0 3px rgba(255,255,255,.5))}.note-indicator{color:#28a745;font-size:1.5rem;line-height:.5}[data-theme=dark] .note-indicator{color:var(--success-color)}.quiz-content-column{flex:1;min-width:0}.quiz-chat-column{flex:1;position:sticky;top:2rem;height:calc(100vh - 5rem);display:flex;flex-direction:column;overflow:hidden}.question-display{white-space:pre-wrap;font-family:"Noto Serif",serif;font-size:1.1rem;line-height:1.6;background-color:var(--light-bg);border-left:5px solid var(--primary-color);padding:16px 20px;margin-top:10px;border-radius:5px;box-shadow:0 2px 4px var(--shadow-color);color:var(--text-color)}.question-display img{max-width:100%;height:auto;border-radius:5px;margin-top:10px}.prev-button,.next-button,.home-button{padding:8px 16px;border:1px solid var(--border-color);border-radius:5px;text-decoration:none;color:var(--text-color);background-color:var(--card-bg);transition:all .2s;margin:0}.home-button{margin:0 auto}.prev-button:hover,.next-button:hover,.home-button:hover{background-color:var(--light-bg);border-color:#b3b3b3}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.app-loader-container{display:flex;align-items:center;justify-content:center;height:100vh;width:100vw;background-color:var(--bg-color);color:var(--text-color);position:fixed;top:0;left:0;z-index:9999}.app-loader-content{text-align:center;animation:fadeIn .5s ease-in-out}.pulsing-logo{font-size:2.5rem;color:var(--primary-color);margin-bottom:2rem;animation:pulse 1.5s infinite}.loader-spinner{width:50px;height:50px;border:5px solid var(--border-color);border-top-color:var(--primary-color);border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 1.5rem}.loading-text{font-size:1.1rem;color:var(--text-muted-color)}.error-state{max-width:500px;padding:2rem;background:var(--light-bg);border:1px solid var(--border-color);border-radius:12px}.primary-button{background-color:var(--primary-color);color:#fff;border:none;padding:10px 20px;border-radius:6px;cursor:pointer;font-size:1rem;transition:opacity .2s}.primary-button:hover{opacity:.9}.secondary-button{background-color:transparent;color:var(--text-color);border:1px solid var(--border-color);padding:10px 20px;border-radius:6px;cursor:pointer;font-size:1rem;transition:background-color .2s}.secondary-button:hover{background-color:var(--light-bg)}@keyframes pulse{0%{transform:scale(1);opacity:1}50%{transform:scale(1.05);opacity:.8}to{transform:scale(1);opacity:1}}@keyframes spin{to{transform:rotate(360deg)}}@media(min-width:1025px)and (max-width:1600px){.question-display{font-size:.95rem}}@media(max-width:1024px){body{padding:1rem}.quiz-page-layout{flex-direction:column;align-items:stretch}.quiz-chat-column{position:static;height:auto;width:100%}.sidebar-container{position:fixed;top:0;left:0;height:100vh;width:250px;transform:translate(-100%);transition:transform .3s ease-in-out;z-index:1001;background-color:var(--bg-color);box-shadow:2px 0 8px #0000001a}.sidebar-container.open{transform:translate(0)}.quiz-nav-sidebar{position:static;height:100%;width:100%;border-radius:0;border:none;border-right:1px solid var(--border-color)}.sidebar-backdrop{display:block;position:fixed;top:0;left:0;width:100%;height:100%;background-color:#00000080;z-index:1000}.sidebar-toggle-btn{display:inline-block;background-color:var(--primary-color);color:#fff;border:none;padding:8px 12px;border-radius:4px;margin-bottom:15px;cursor:pointer;font-size:.9rem;font-weight:500}[data-theme=dark] .sidebar-toggle-btn{color:#121212}.quiz-chat-column .chat-container{height:70vh}.sidebar-item{width:100%;height:auto;padding:12px 16px;flex-wrap:nowrap;justify-content:flex-start;font-size:.95rem}.sidebar-item-content{display:flex;width:100%;align-items:center;justify-content:space-between}.sidebar-tags-wrapper{display:flex;gap:4px;margin-left:auto;margin-right:8px}.sidebar-item .emoji-tag{font-size:1.1em}.question-display{font-size:.85rem;line-height:1.5}h3{font-size:.8rem}}.topic-actions{margin-top:.75rem;display:flex;align-items:center;gap:1.5rem}.completion-checkbox{display:flex;align-items:center;gap:.5rem;font-size:.9em;color:var(--text-muted-color);cursor:pointer}.completion-checkbox input{cursor:pointer}.emoji-picker-container{position:relative;display:inline-block}.emoji-trigger-btn{background:none;border:none;font-size:1.2rem;cursor:pointer;padding:4px;border-radius:50%;transition:background-color .2s;display:flex;align-items:center;justify-content:center}.emoji-trigger-btn:hover{background-color:var(--card-bg);box-shadow:0 0 0 1px var(--border-color)}.emoji-picker-popover{position:absolute;top:100%;left:0;margin-top:8px;background-color:var(--card-bg);border:1px solid var(--border-color);border-radius:12px;padding:12px;box-shadow:0 4px 12px var(--shadow-color);z-index:1000;min-width:180px}.emoji-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.emoji-btn{background:transparent;border:1px solid transparent;font-size:1.5rem;padding:8px;border-radius:8px;cursor:pointer;transition:all .2s;display:flex;align-items:center;justify-content:center}.emoji-btn:hover{background-color:var(--light-bg);transform:scale(1.1)}.emoji-btn.active{background-color:var(--sidebar-active-bg);border-color:transparent;box-shadow:0 0 0 1px var(--primary-color)}.quiz-header-clickable{display:flex;align-items:center;gap:12px;cursor:pointer;padding:4px 12px;border-radius:8px;transition:background-color .2s;position:relative;-webkit-user-select:none;user-select:none}.quiz-header-clickable:hover{background-color:var(--sidebar-active-bg)}.header-tags-display{display:flex;gap:4px;font-size:1.2rem}.emoji-glow{filter:drop-shadow(0 0 2px rgba(0,0,0,.2))}[data-theme=dark] .emoji-glow{filter:drop-shadow(0 0 4px rgba(255,255,255,.6))}.quiz-header-clickable .emoji-picker-container{position:absolute;top:100%;left:50%;transform:translate(-50%);margin-top:10px;z-index:2000}