:root{--primary-bg: #313338;--card-bg: #2b2d31;--glass-bg: rgba(0, 0, 0, .2);--glass-border: rgba(255, 255, 255, .05);--accent: #5865f2;--secondary-accent: #3ba55c;--text-main: #f2f3f5;--text-dim: #b5bac1;--font-family: "gg sans", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--transition: all .2s ease-out;--success: #23a559;--warning: #f0b232}mjx-container{max-width:100%;overflow-x:auto;overflow-y:hidden;padding:4px 0}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}body{background-color:var(--primary-bg);color:var(--text-main);font-family:var(--font-family);overflow-x:hidden;min-height:100vh}#app{max-width:500px;margin:0 auto;min-height:100vh;position:relative;background:radial-gradient(circle at top right,rgba(0,122,255,.08),transparent 400px),radial-gradient(circle at bottom left,rgba(88,200,242,.05),transparent 400px)}header{padding:1rem;display:flex;align-items:center;gap:12px;position:sticky;top:0;z-index:100;background:#0a0a0ccc;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid var(--glass-border)}.logo{width:40px;height:40px;border-radius:50%;object-fit:cover;border:2px solid var(--accent)}.app-name{font-size:1.25rem;font-weight:700;letter-spacing:-.5px;background:linear-gradient(to right,#fff,#a1a1aa);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.banner-carousel-container{position:relative;width:100%;aspect-ratio:4 / 2;border-radius:16px;overflow:hidden;margin:1rem 0;box-shadow:0 8px 24px #0006;border:1px solid var(--glass-border)}.banner-track{display:flex;width:400%;height:100%;transition:transform .6s cubic-bezier(.25,1,.5,1)}.banner-slide{width:25%;height:100%;position:relative;display:flex;flex-direction:column;justify-content:flex-end;padding:1.2rem;background-size:cover;background-position:center}.banner-slide:before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,#0000001a,#000000bf)}.banner-content{position:relative;z-index:2}.banner-quote{font-size:.92rem;font-weight:600;line-height:1.35;color:#fff;text-shadow:0 2px 4px rgba(0,0,0,.6);margin-bottom:4px}.banner-sub{font-size:.75rem;color:#ffffffd9;font-weight:500}.banner-logo-overlay{position:absolute;top:10px;right:10px;z-index:10;width:34px;height:34px;border-radius:50%;background:#00000059;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;padding:4px;pointer-events:none}.banner-logo-overlay img{width:100%;height:100%;border-radius:50%;object-fit:cover;opacity:.9}.banner-dots{position:absolute;bottom:8px;right:12px;z-index:10;display:flex;gap:5px}.banner-dot{width:6px;height:6px;border-radius:50%;background:#fff6;transition:all .3s}.banner-dot.active{background:var(--accent);width:16px;border-radius:4px}.mood-bar{background:linear-gradient(135deg,#5865f226,#3ba55c1f);border:1px solid var(--glass-border);border-radius:12px;padding:12px 16px;margin-bottom:1.2rem;display:flex;align-items:center;justify-content:space-between;gap:12px}.mood-title{font-size:.88rem;font-weight:700;color:#fff}.mood-text{font-size:.78rem;color:var(--text-dim)}.story-circle{width:66px;height:66px;border-radius:50%;padding:3px;background:linear-gradient(45deg,#007aff,#00b4f0,#00e0ff);display:flex;align-items:center;justify-content:center;transition:transform .2s}.story-circle:active{transform:scale(.92)}.story-inner{width:100%;height:100%;background:var(--primary-bg);border-radius:50%;padding:2px;display:flex;align-items:center;justify-content:center;overflow:hidden}.story-inner img{width:100%;height:100%;object-fit:cover;border-radius:50%}.story-label{font-size:11px;text-align:center;color:var(--text-main);font-weight:500;white-space:nowrap}.section-title{padding:1rem;font-size:1rem;font-weight:600;color:var(--text-dim)}.profile-banner{width:100%;height:120px;background:linear-gradient(135deg,var(--accent),var(--secondary-accent));position:relative;border-radius:0 0 12px 12px}.profile-header-section{padding:0 1rem;margin-top:-35px;position:relative;z-index:10;margin-bottom:20px}.profile-avatar-overlap{width:75px;height:75px;border-radius:50%;border:4px solid var(--primary-bg);background:var(--card-bg);display:flex;align-items:center;justify-content:center;font-size:32px;box-shadow:0 4px 12px #0000004d}.profile-info{margin-top:8px}.stats-bar{display:flex;gap:20px;margin-top:12px;padding:8px 0;border-top:1px solid var(--glass-border);border-bottom:1px solid var(--glass-border)}.stat-item{display:flex;flex-direction:column}.stat-val{font-weight:700;font-size:14px}.stat-label{font-size:10px;color:var(--text-dim);text-transform:uppercase}.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;padding:10px 0}.course-card{aspect-ratio:1/1;background:var(--card-bg);border:1px solid var(--glass-border);display:flex;flex-direction:column;justify-content:center;align-items:center;padding:4px;cursor:pointer}.course-card i{font-size:1.5rem;margin-bottom:4px}.course-card h3{font-size:10px;font-weight:500;text-align:center}.chat-feed{display:flex;flex-direction:column;gap:20px;padding:1rem;padding-bottom:100px}.chat-message{display:flex;gap:12px;margin-bottom:15px}.avatar-col{width:40px;flex-shrink:0}.avatar-circle{width:40px;height:40px;border-radius:50%;background:var(--accent);display:flex;align-items:center;justify-content:center;font-size:18px}.content-col{flex:1}.chat-header{display:flex;align-items:center;gap:8px;margin-bottom:4px}.author-name{font-weight:600;color:#fff;font-size:14px}.bot-tag{background:var(--accent);color:#fff;font-size:9px;padding:1px 4px;border-radius:3px;font-weight:700}.timestamp{font-size:11px;color:var(--text-dim)}.cbt-message-box{background:#2b2d31;border-left:4px solid var(--accent);border-radius:4px;padding:12px;margin-top:10px}.category-filter{display:flex;overflow-x:auto;padding:0 1rem;gap:10px;margin-bottom:1.5rem;scrollbar-width:none}.filter-chip{padding:8px 16px;border-radius:20px;background:var(--glass-bg);border:1px solid var(--glass-border);font-size:13px;font-weight:500;white-space:nowrap;cursor:pointer;transition:var(--transition)}.filter-chip.active{background:var(--accent);border-color:var(--accent);color:#fff}.exam-banner{margin:1.5rem 1rem;padding:1.5rem;border-radius:20px;background:linear-gradient(135deg,#007aff,#00c6ff);display:flex;align-items:center;justify-content:space-between;box-shadow:0 10px 20px #007aff4d;cursor:pointer;transition:var(--transition)}.exam-banner:active{transform:scale(.97)}.exam-banner-info h2{font-size:1.25rem;font-weight:800;margin-bottom:4px}.exam-banner-info p{font-size:13px;opacity:.9}.exam-icon-large{font-size:2.5rem}.cbt-container{padding:1.5rem;display:flex;flex-direction:column;gap:20px}.cbt-question{font-size:1.1rem;line-height:1.5;background:var(--glass-bg);padding:1.5rem;border-radius:16px;border:1px solid var(--glass-border)}.options-grid{display:grid;gap:12px}.option-card{padding:16px;background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:12px;cursor:pointer;transition:var(--transition);display:flex;align-items:center;gap:12px;position:relative}.option-result-icon{position:absolute;right:16px;font-size:1.2rem}.option-card:hover{background:#ffffff1a}.option-card.selected{border-color:var(--accent);background:#ff3b301a}.option-card.correct{border-color:var(--success);background:#34c7591a}.option-card.wrong{border-color:var(--accent);background:#ff3b301a}.option-letter{width:28px;height:28px;border-radius:50%;background:var(--glass-border);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:12px}.option-card.selected .option-letter{background:var(--accent)}.discord-embed{background:#2b2d31;border-left:4px solid #f1c40f;border-radius:4px;padding:16px;color:#dbdee1;font-family:gg sans,Noto Sans,Helvetica Neue,Helvetica,Arial,sans-serif;margin-bottom:12px;font-size:15px;line-height:1.5}.discord-embed-title{font-weight:600;margin-bottom:12px;color:#fff;display:flex;align-items:center;gap:6px}.discord-buttons-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px}.discord-btn{background:#4e5058;color:#dbdee1;border:none;border-radius:3px;padding:8px 16px;font-size:14px;font-weight:500;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:6px;transition:background .1s}.discord-btn:hover{background:#6d6f78}.discord-btn.blue{background:#5865f2;color:#fff}.discord-btn.blue:hover{background:#4752c4}.discord-btn.green{background:#248046;color:#fff}.discord-btn.green:hover{background:#1a6334}.discord-btn.red{background:#da373c;color:#fff}.discord-btn.red:hover{background:#a12828}.discord-btn.gray{background:#4e5058}.discord-btn.gray:hover{background:#6d6f78}.discord-btn.selected-option{background:#248046;color:#fff}.discord-btn.wrong-option{background:#da373c;color:#fff}.discord-answer-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:6px;background:#2b2d31;padding:12px;border-radius:4px;font-family:monospace;font-size:13px;color:#dbdee1}.cbt-nav{display:flex;justify-content:space-between;margin-top:1rem}.btn-primary{padding:12px 24px;border-radius:12px;background:var(--accent);border:none;color:#fff;font-weight:600;cursor:pointer}.btn-secondary{padding:12px 24px;border-radius:12px;background:var(--glass-bg);border:1px solid var(--glass-border);color:#fff;font-weight:600;cursor:pointer}.btn-warning{padding:12px 24px;border-radius:12px;background:var(--warning);border:none;color:#000;font-weight:600;cursor:pointer}.question-grid{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:1rem}.grid-btn{width:36px;height:36px;border-radius:8px;background:var(--glass-bg);border:1px solid var(--glass-border);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;font-weight:600;font-size:14px}.grid-btn.answered{background:var(--success);border-color:var(--success)}.grid-btn.marked{background:var(--warning);border-color:var(--warning);color:#000}.grid-btn.current{border:2px solid var(--secondary-accent)}.explanation-block{margin-top:1rem;padding:1rem;background:#007aff1a;border-left:4px solid var(--secondary-accent);border-radius:8px;font-size:.95rem}.publish-block{margin-top:2rem}.publish-block h3{margin-bottom:1rem;color:var(--accent)}.publish-q-item{margin-bottom:1.5rem;padding:1rem;background:var(--glass-bg);border-radius:12px}.timer-bar{background:#ff3b3026;border-bottom:1px solid var(--accent);padding:4px 12px;text-align:center;font-size:14px;font-weight:700;color:var(--accent);position:sticky;top:60px;z-index:90;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.bottom-nav{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:500px;height:65px;background:#111214;border-top:1px solid var(--glass-border);display:flex;justify-content:space-around;align-items:center;padding-bottom:env(safe-area-inset-bottom);z-index:1000}.nav-item{display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-dim);cursor:pointer;transition:var(--transition);flex:1;gap:4px}.nav-item i{font-size:18px}.nav-item span{font-size:10px;font-weight:500}.nav-item.active{color:#fff}.nav-item.active i{color:var(--accent)}.nav-item{display:flex;flex-direction:column;align-items:center;gap:4px;color:var(--text-dim);font-size:10px;cursor:pointer;transition:var(--transition)}.nav-item.active{color:var(--accent)}.nav-item i{font-size:20px;font-style:normal}.admin-card{background:linear-gradient(135deg,#1e1e22,#0a0a0c);border:1px solid var(--glass-border);border-radius:16px;padding:1.5rem;margin-bottom:1rem}.status-indicator{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--success);margin-right:8px;box-shadow:0 0 8px var(--success)}.admin-btn-group{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:1rem}.input-field{width:100%;padding:12px;background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:8px;color:#fff;margin-top:8px;font-family:inherit}.leaderboard-list{display:flex;flex-direction:column;gap:2px;padding:0}.leaderboard-item{display:flex;align-items:center;padding:2px 0;gap:8px;border:none}.rank-badge{font-weight:700;font-size:13px;color:#fff;width:auto;margin-right:4px}.leaderboard-info h4{font-size:13px;font-weight:400;color:var(--text-main);display:inline}.score-display .points{font-size:13px;font-weight:700;color:#fff}.label-dim{color:var(--text-dim);font-weight:400}.personal-best-card{margin:0 1rem 1.5rem;padding:1.25rem;background:linear-gradient(135deg,#ffd7001a,#ffd7000d);border:1px solid rgba(255,215,0,.3);border-radius:16px;display:flex;align-items:center;gap:16px;animation:pulse 2s infinite ease-in-out}@keyframes pulse{0%{box-shadow:0 0 #ffd70033}70%{box-shadow:0 0 0 10px #ffd70000}to{box-shadow:0 0 #ffd70000}}.pb-icon{font-size:2rem}.pb-info h4{font-size:.8rem;text-transform:uppercase;letter-spacing:1px;color:gold;margin-bottom:4px}.pb-info h2{font-size:1.25rem;font-weight:700}.pb-stats{margin-left:auto;text-align:right}.pb-stats .val{font-size:1.5rem;font-weight:800;color:#fff}.page{padding-bottom:80px}.back-btn{background:none;border:none;color:var(--text-main);font-size:1.5rem;cursor:pointer;padding:8px}.hero-banner{width:100%;height:200px;background:linear-gradient(45deg,#121214,#1e1e22);display:flex;align-items:center;justify-content:center;margin-bottom:2rem;position:relative;border-bottom:1px solid var(--glass-border)}.content-section{padding:1.5rem}.module-card{background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:16px;padding:1.5rem;margin-bottom:1.5rem}.module-card h2{font-size:1.25rem;margin-bottom:1rem;color:var(--accent)}.latex-content{line-height:1.6;color:var(--text-dim)}.topic-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:1.5rem}.topic-card{aspect-ratio:9/16;background:#1e1e22;border-radius:8px;overflow:hidden;position:relative;border:1px solid var(--glass-border)}.topic-image{width:100%;height:100%;background:linear-gradient(to bottom,#2a2a30,#121214);display:flex;align-items:center;justify-content:center;font-size:.8rem;color:#555}.topic-info{position:absolute;bottom:0;left:0;right:0;padding:10px;background:linear-gradient(transparent,#000c)}.video-wrapper{margin-top:2rem;width:100%;aspect-ratio:16/9;background:#000;border-radius:16px;overflow:hidden;position:relative}.video-wrapper iframe{width:100%;height:100%;border:none}.video-placeholder{width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center}.video-controls{position:absolute;right:12px;bottom:100px;display:flex;flex-direction:column;gap:20px;align-items:center}.control-item{display:flex;flex-direction:column;align-items:center;gap:4px}.control-btn{width:44px;height:44px;border-radius:50%;background:#ffffff1a;border:none;color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.25rem;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.control-btn:active{transform:scale(.9)}.control-label{font-size:12px;font-weight:500}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn .5s ease-out forwards}.question-box{background:#fff;color:#2e3338;padding:1.5rem;border-radius:8px;margin-bottom:15px;font-family:Consolas,Monaco,monospace;line-height:1.5;font-size:14px}.discord-option-row{display:flex;gap:8px;margin-bottom:12px}.discord-btn.option-sq{width:45px;height:45px;border-radius:6px;font-weight:700;font-size:16px}.discord-grid-compact{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin-top:15px}.grid-btn-sq{aspect-ratio:1/1;border-radius:4px;border:none;background:#4f545c;color:#fff;font-size:13px;font-weight:600;cursor:pointer}.grid-btn-sq.answered{background:#3ba55c}.grid-btn-sq.marked{background:#5865f2}.grid-btn-sq.current{border:2px solid #fff}