:root{--primary:#7000ff;--secondary:#00f0ff;--success:#00ff9d;--danger:#f05;--warning:#fc0;--shop:#f0c;--bg-dark:#0a0a12;--bg-card:#161625;--text-main:#fff;--text-muted:#a0a0b0}body.theme-matrix{--primary:#0f0;--secondary:#008f11;--text-main:#0f0;--bg-card:#010;background-color:#000;background-image:linear-gradient(#0000,#0000 23%,#00ff004d 24% 25%,#0000 26% 73%,#00ff004d 74% 75%,#0000 76%),linear-gradient(90deg,#0000 24%,#00ff004d 25% 26%,#0000 27% 74%,#00ff004d 75% 76%,#0000 77%,#0000);background-size:50px 50px;font-family:Courier New,monospace}body.theme-retro{--primary:#f05;--secondary:#fe0;--bg-card:#202;background:repeating-linear-gradient(45deg,#2b1120,#2b1120 10px,#1a0a13 10px 20px);font-family:Rubik Glitch,sans-serif}body.theme-gold{--primary:gold;--secondary:#fa0;--text-main:#ffebb3;--bg-card:#1a1200;background-image:radial-gradient(circle,#430 0%,#000 100%)}.golden-name{background:linear-gradient(90deg,#bf953f,#fcf6ba,#b38728,#fbf5b7,#aa771c);text-shadow:0 0 10px #ffd700cc;letter-spacing:1px;background-size:200%;-webkit-background-clip:text;background-clip:text;font-weight:800;animation:3s linear infinite shine;color:#0000!important}@keyframes shine{0%{background-position:0%}to{background-position:200%}}.leaderboard-item.profile-frame{z-index:1;border-radius:8px;margin:5px 0;position:relative}.leaderboard-item.frame-gold{background:linear-gradient(90deg,#ffd7000d,#0000);box-shadow:0 0 15px #ffd70066,inset 0 0 10px #ffd7001a;border:2px solid gold!important}.leaderboard-item.frame-neon{background:linear-gradient(90deg,#00f0ff0d,#0000);box-shadow:0 0 15px #00f0ff66,inset 0 0 10px #00f0ff1a;border:2px solid #00f0ff!important}*{scrollbar-width:thin;scrollbar-color:var(--primary)transparent}::-webkit-scrollbar{width:12px}::-webkit-scrollbar-track{background:#0000001a;border-radius:10px}::-webkit-scrollbar-thumb{background-color:var(--primary);background-clip:content-box;border:3px solid #0000;border-radius:20px}::-webkit-scrollbar-thumb:hover{background-color:var(--secondary)}@keyframes pulse-glow{0%{text-shadow:0 0 10px var(--primary);transform:scale(1)}50%{text-shadow:0 0 25px var(--secondary),0 0 10px white;transform:scale(1.02)}to{text-shadow:0 0 10px var(--primary);transform:scale(1)}}@keyframes float-up{0%{opacity:1;transform:translateY(0)scale(1)}to{opacity:0;transform:translateY(-50px)scale(1.2)}}@keyframes float-center{0%{opacity:0;transform:translate(-50%,-50%)scale(.5)}20%{opacity:1;transform:translate(-50%,-50%)scale(1.2)}80%{opacity:1;transform:translate(-50%,-50%)scale(1)}to{opacity:0;transform:translate(-50%,-80%)scale(1.5)}}@keyframes slideIn{0%{opacity:0;transform:translateY(50px)}to{opacity:1;transform:translateY(0)}}@keyframes popIn{0%{opacity:0;transform:scale(0)}80%{opacity:1;transform:scale(1.1)}to{opacity:1;transform:scale(1)}}*{box-sizing:border-box;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}html,body{height:100dvh;margin:0;padding:0}body{background-color:var(--bg-dark);color:var(--text-main);background-image:radial-gradient(circle,#1a1a2e 0%,#000 100%);flex-direction:column;justify-content:center;align-items:center;font-family:Heebo,sans-serif;transition:background .5s,color .5s;display:flex;overflow:hidden}.screen{z-index:10;flex-direction:column;width:100%;max-width:600px;height:100%;padding:20px;display:none;position:relative}.screen.active{display:flex}.main-menu-container{flex-direction:column;justify-content:space-evenly;align-items:center;width:100%;max-width:500px;height:100%;margin:0 auto;padding-top:50px;padding-bottom:20px;display:flex}.btn{background:linear-gradient(135deg,var(--primary),#4c00b0);color:#fff;cursor:pointer;border:none;border-radius:12px;justify-content:center;align-items:center;gap:10px;margin:10px 0;padding:15px 30px;font-size:1.2rem;font-weight:700;transition:all .2s;display:flex;position:relative;overflow:hidden;box-shadow:0 4px 15px #7000ff66}.btn:active{transform:scale(.95)}.btn:disabled{filter:grayscale();opacity:.5;cursor:not-allowed}.btn-outline{border:2px solid var(--secondary);color:var(--secondary);background:0 0;box-shadow:0 0 10px #00f0ff1a}.btn-shop{background:linear-gradient(135deg,#f0c,#906);border:1px solid #fff3;box-shadow:0 4px 15px #f0c6}.name-input{border:2px solid var(--primary);color:#fff;text-align:center;background:#ffffff1a;border-radius:12px;outline:none;width:80%;margin-bottom:10px;padding:15px;font-family:Heebo,sans-serif;font-size:1.2rem;transition:all .3s}.name-input:focus{box-shadow:0 0 15px var(--primary);border-color:var(--secondary)}.custom-topics-container{width:90%;margin-bottom:5px}.input-group{align-items:stretch;width:100%;display:flex}.topics-list{flex-wrap:wrap;justify-content:center;gap:8px;min-height:30px;margin-top:10px;display:flex}.topic-tag{border:1px solid var(--primary);background:#7000ff4d;border-radius:20px;align-items:center;gap:8px;padding:5px 12px;font-size:.9rem;animation:.3s ease-out popIn;display:flex}.topic-remove{cursor:pointer;color:var(--danger);font-weight:700}.topic-remove:hover{color:#f57}.google-toggle-container{background:#ffffff0d;border-radius:30px;justify-content:center;align-items:center;gap:10px;width:fit-content;margin-bottom:10px;margin-left:auto;margin-right:auto;padding:5px 15px;display:flex}.switch{width:40px;height:20px;display:inline-block;position:relative}.switch input{opacity:0;width:0;height:0}.slider{cursor:pointer;background-color:#ccc;border-radius:34px;transition:all .4s;position:absolute;inset:0}.slider:before{content:"";background-color:#fff;border-radius:50%;width:14px;height:14px;transition:all .4s;position:absolute;bottom:3px;left:3px}input:checked+.slider{background-color:#4285f4}input:checked+.slider:before{transform:translate(20px)}#sources-list{flex-direction:column;gap:5px;width:90%;max-height:150px;margin-top:15px;margin-left:auto;margin-right:auto;display:flex;overflow-y:auto}.source-item{text-align:right;white-space:nowrap;text-overflow:ellipsis;background:#4285f433;border-left:3px solid #4285f4;border-radius:4px;padding:8px;font-size:.8rem;animation:.3s ease-out slideIn;overflow:hidden}#menu-screen{text-align:center;justify-content:center;align-items:center;overflow:hidden}.game-title{color:var(--secondary);text-shadow:0 0 20px var(--primary);margin-bottom:5px;padding:0 10px;font-family:Rubik Glitch,sans-serif;font-size:3.5rem;line-height:1.1;animation:2s ease-in-out infinite alternate pulse-glow}.subtitle{color:var(--text-muted);margin-bottom:15px;padding:0 10px;font-size:1.1rem}.daily-challenge-card{text-align:center;background:linear-gradient(135deg,#ffd7001a,#ff8c001a);border:1px solid #ffd7004d;border-radius:15px;width:95%;max-width:500px;margin-bottom:10px;padding:10px}#game-screen{justify-content:space-between}.hud{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#161625e6;border:1px solid #ffffff1a;border-radius:15px;justify-content:space-between;align-items:center;margin-bottom:10px;padding:10px 15px;display:flex}.stat-box{flex-direction:column;align-items:center;display:flex;position:relative}.stat-label{color:var(--text-muted);font-size:.7rem}.stat-value{font-family:monospace;font-size:1.2rem;font-weight:700}.timer-container{background:#333;border-radius:5px;width:100%;height:8px;margin-top:5px;position:relative;overflow:hidden}.timer-bar{background:var(--success);width:100%;height:100%;transition:width .1s linear,background-color .3s}.timer-bar.danger{background:var(--danger);animation:.5s infinite pulse-red}.progress-text{text-align:center;color:var(--text-muted);margin-bottom:10px;font-size:.9rem}.question-card{background:var(--bg-card);border:1px solid #7000ff33;border-radius:20px;flex-direction:column;flex-grow:1;justify-content:center;margin-bottom:10px;padding:20px;animation:.5s ease-out slideIn;display:flex;position:relative;box-shadow:0 10px 30px #00000080}.question-text{text-align:center;margin-bottom:25px;font-size:1.4rem;font-weight:700;line-height:1.3}.options-grid{gap:12px;width:100%;display:grid}@media (min-width:601px){.options-grid{grid-template-columns:repeat(3,1fr)}.options-grid.two-options{grid-template-columns:repeat(2,1fr)}}@media (max-width:600px){.options-grid,.options-grid.two-options{grid-template-columns:1fr}}.option-btn{color:#fff;cursor:pointer;text-align:center;background:#ffffff0d;border:1px solid #ffffff1a;border-radius:10px;justify-content:center;align-items:center;padding:15px;font-size:1.1rem;transition:all .2s;display:flex;position:relative}.option-btn:hover:not(:disabled){border-color:var(--primary);background:#ffffff1a}.option-btn.correct{border-color:var(--success);color:var(--success);background:#00ff9d33}.option-btn.wrong{border-color:var(--danger);color:var(--danger);background:#f053}.bottom-controls{justify-content:space-between;align-items:center;gap:10px;margin-top:10px;display:flex}.lifelines{justify-content:flex-start;gap:10px;display:flex}.lifeline-btn{cursor:pointer;background:#2a2a3d;border:none;border-radius:50%;justify-content:center;align-items:center;width:50px;height:50px;transition:all .2s;display:flex;position:relative;box-shadow:0 4px 10px #0000004d}.lifeline-btn:hover:not(:disabled){background:#3a3a4d;transform:translateY(-3px)}.lifeline-btn:disabled{opacity:.3;cursor:not-allowed}.lifeline-badge{background:var(--danger);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:18px;height:18px;font-size:.7rem;display:flex;position:absolute;top:-5px;right:-5px}.shop-grid{grid-template-columns:1fr;gap:15px;padding:10px;display:grid}.shop-item{background:#ffffff0d;border:1px solid #ffffff1a;border-radius:12px;justify-content:space-between;align-items:center;padding:15px;transition:all .2s;display:flex}.shop-item:hover{border-color:var(--shop);background:#ff00cc1a}.shop-item-details{text-align:right}.shop-item-title{font-size:1.1rem;font-weight:700}.shop-item-desc{color:var(--text-muted);font-size:.8rem}.shop-item-price{color:var(--warning);font-family:monospace;font-size:1.2rem;font-weight:700}#loading-screen{text-align:center;z-index:100;background:#000000f2;justify-content:center;align-items:center;width:100%;height:100%;position:absolute;top:0;left:0}.loader{border:5px solid var(--primary);border-bottom-color:#0000;border-radius:50%;width:60px;height:60px;margin-bottom:20px;animation:1s linear infinite rotation}.loading-text{color:var(--secondary);margin-bottom:10px;font-size:1.5rem}.loading-tip{color:var(--text-muted);max-width:80%;margin:0 auto;font-size:.9rem}#gameover-screen{text-align:center;justify-content:center;align-items:center}.stat-row{border-bottom:1px solid #ffffff1a;justify-content:space-between;width:100%;padding:10px;display:flex}.ai-thinking{border:1px solid var(--secondary);color:#fff;z-index:20;text-align:right;background:#141428f2;border-radius:15px;max-width:90%;padding:15px;font-size:.95rem;line-height:1.5;display:none;position:absolute;bottom:90px;left:50%;transform:translate(-50%);box-shadow:0 5px 20px #00000080}.modal-overlay{z-index:200;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);background:#000000d9;justify-content:center;align-items:center;width:100%;height:100%;display:none;position:fixed;top:0;left:0}.modal-overlay.active{animation:.3s ease-out popIn;display:flex}.modal-content{background:var(--bg-card);border:1px solid var(--primary);border-radius:20px;flex-direction:column;width:90%;max-width:500px;max-height:80vh;display:flex;overflow:hidden;box-shadow:0 0 50px #7000ff4d}.modal-header{text-align:center;color:var(--secondary);background:linear-gradient(90deg,#2a0050,#1a1a2e);border-bottom:1px solid #ffffff1a;padding:15px;font-size:1.5rem;font-weight:700;position:relative}.modal-back-btn{color:#fff;cursor:pointer;background:0 0;border:none;font-size:1.2rem;display:none;position:absolute;top:50%;left:15px;transform:translateY(-50%)}.modal-body{padding:20px;overflow-y:auto}.modal-footer{text-align:center;border-top:1px solid #ffffff1a;padding:15px}.achievement-item{opacity:.5;background:#ffffff0d;border-radius:8px;align-items:center;gap:10px;margin-bottom:10px;padding:10px;display:flex}.achievement-item.unlocked{opacity:1;border:1px solid var(--primary);background:linear-gradient(90deg,#7000ff33,#0000)}.achievement-icon{font-size:1.5rem}.leaderboard-item{cursor:pointer;border-bottom:1px solid #333;justify-content:space-between;align-items:center;padding:12px;transition:background .2s;display:flex}.leaderboard-item:hover{background:#ffffff0d}.float-text{pointer-events:none;z-index:100;white-space:nowrap;text-shadow:0 0 5px #000c;font-weight:700;position:absolute}.float-up{animation:1s ease-out forwards float-up}.float-center{font-size:2rem;animation:2s ease-out forwards float-center}.menu-top-bar{z-index:50;justify-content:flex-end;gap:10px;width:100%;display:flex;position:absolute;top:15px;right:15px}.btn-icon-small{color:#fff;cursor:pointer;background:#ffffff0d;border:1px solid #fff3;border-radius:12px;justify-content:center;align-items:center;width:45px;height:45px;transition:all .2s;display:flex;position:relative}.btn-icon-small:hover{border-color:var(--secondary);background:#ffffff1a;transform:scale(1.05)}.status-dot{background:var(--success);width:10px;height:10px;box-shadow:0 0 5px var(--success);border-radius:50%;position:absolute;top:-2px;right:-2px}.auth-tabs button:hover{color:#fff!important}@media (max-width:480px){.menu-top-bar{top:10px;right:10px}.btn-icon-small{width:35px;height:35px}.main-menu-container{padding-top:60px;padding-bottom:10px}.game-title{margin-bottom:8px;font-size:2.8rem}.subtitle{margin-bottom:10px;font-size:.9rem}.name-input{width:90%;margin-bottom:10px;padding:10px;font-size:1rem}.btn{width:100%;margin:5px 0;padding:10px 15px;font-size:1rem}.daily-challenge-card{padding:8px}.daily-challenge-card div{font-size:.8rem}.custom-topics-container{margin-bottom:15px}.menu-bottom-buttons{margin-top:10px!important}.google-toggle-container{margin-bottom:15px;padding:2px 10px}}@media (max-height:700px){.game-title{margin-bottom:5px;font-size:2.8rem}.subtitle{display:none}.btn{margin:3px 0;padding:8px 12px;font-size:.9rem}.daily-challenge-card{margin-bottom:5px;padding:5px}.name-input{margin-bottom:5px;padding:8px}.main-menu-container{padding-top:40px}}