:root{--bg-primary:#0a0a1a;--bg-secondary:#111128;--bg-card:#ffffff0a;--bg-card-hover:#ffffff14;--bg-glass:#ffffff0f;--border-glass:#ffffff1a;--text-primary:#f0f0ff;--text-secondary:#88a;--text-muted:#557;--accent-blue:#4f7cff;--accent-cyan:#00e5ff;--accent-purple:#a855f7;--accent-pink:#f43f8e;--accent-green:#34d399;--accent-orange:#fb923c;--accent-red:#ef4444;--gradient-primary:linear-gradient(135deg, var(--accent-blue), var(--accent-purple));--gradient-accent:linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));--gradient-danger:linear-gradient(135deg, var(--accent-pink), var(--accent-red));--radius-sm:8px;--radius-md:14px;--radius-lg:20px;--radius-xl:28px;--shadow-glow:0 0 40px #4f7cff26;--font-display:"Outfit", sans-serif;--font-body:"Inter", sans-serif;--transition:.25s cubic-bezier(.4, 0, .2, 1)}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:16px}body{font-family:var(--font-body);background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;min-height:100vh;overflow-x:hidden}#app{min-height:100vh;position:relative}.btn{font-family:var(--font-display);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition);border:none;justify-content:center;align-items:center;gap:8px;padding:12px 24px;font-size:.95rem;font-weight:600;text-decoration:none;display:inline-flex;position:relative;overflow:hidden}.btn:after{content:"";transition:background var(--transition);background:#fff0;position:absolute;inset:0}.btn:hover:after{background:#ffffff14}.btn:active{transform:scale(.97)}.btn-primary{background:var(--gradient-primary);color:#fff;box-shadow:0 4px 20px #4f7cff4d}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 30px #4f7cff73}.btn-accent{background:var(--gradient-accent);color:#0a0a1a;box-shadow:0 4px 20px #00e5ff40}.btn-accent:hover{transform:translateY(-1px);box-shadow:0 6px 30px #00e5ff66}.btn-outline{color:var(--text-primary);border:1.5px solid var(--border-glass);background:0 0}.btn-outline:hover{border-color:var(--accent-blue);color:var(--accent-blue)}.btn-ghost{color:var(--text-secondary);background:0 0;padding:8px 16px}.btn-ghost:hover{color:var(--text-primary)}.btn-lg{border-radius:var(--radius-lg);padding:16px 32px;font-size:1.05rem}.btn-sm{padding:8px 16px;font-size:.82rem}.btn-full{width:100%}.btn-icon{transition:transform var(--transition);font-size:1.1em}.btn:hover .btn-icon{transform:translate(3px)}.btn[disabled]{opacity:.4;cursor:not-allowed;pointer-events:none}.bg-effects{z-index:0;pointer-events:none;position:fixed;inset:0;overflow:hidden}.orb{filter:blur(80px);opacity:.35;border-radius:50%;animation:20s ease-in-out infinite 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pulse{0%,to{transform:scale(1)}50%{transform:scale(1.08)}}.game-title{font-family:var(--font-display);letter-spacing:-1px;font-size:3.2rem;font-weight:900;line-height:1.1}.title-math{background:var(--gradient-accent);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.title-battle{background:var(--gradient-primary);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.game-subtitle{color:var(--text-secondary);letter-spacing:2px;text-transform:uppercase;margin-top:8px;font-size:.95rem;font-weight:500}.hero-description{color:var(--text-secondary);margin-bottom:40px;max-width:460px;margin-inline:auto;font-size:.95rem;line-height:1.7}.action-cards{flex-direction:column;gap:20px;margin-bottom:48px;display:flex}.action-card{background:var(--bg-glass);border:1px solid var(--border-glass);border-radius:var(--radius-xl);text-align:center;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);transition:all var(--transition);padding:32px 28px;position:relative;overflow:hidden}.action-card:hover{border-color:#ffffff2e;transform:translateY(-2px)}.card-glow{opacity:0;pointer-events:none;background:radial-gradient(circle,#4f7cff0f 0%,#0000 60%);width:200%;height:200%;transition:opacity .5s;position:absolute;top:-50%;left:-50%}.action-card:hover .card-glow{opacity:1}.card-icon{margin-bottom:12px;font-size:2.4rem}.action-card h2{font-family:var(--font-display);margin-bottom:6px;font-size:1.4rem;font-weight:700}.action-card p{color:var(--text-secondary);margin-bottom:20px;font-size:.88rem}.action-card-divider{color:var(--text-muted);letter-spacing:3px;justify-content:center;align-items:center;gap:16px;font-size:.8rem;font-weight:700;display:flex}.action-card-divider:before,.action-card-divider:after{content:"";background:var(--border-glass);flex:1;height:1px}.join-input-group{gap:10px;display:flex}.input-room-code{border:1.5px solid var(--border-glass);border-radius:var(--radius-md);color:var(--text-primary);font-family:var(--font-display);letter-spacing:4px;text-align:center;text-transform:uppercase;transition:all var(--transition);background:#0000004d;outline:none;flex:1;padding:14px 18px;font-size:1.1rem;font-weight:700}.input-room-code::placeholder{color:var(--text-muted);letter-spacing:1px;font-size:.85rem;font-weight:400}.input-room-code:focus{border-color:var(--accent-blue);box-shadow:0 0 20px #4f7cff26}.input-room-code.input-error{border-color:var(--accent-red);animation:.4s shake}@keyframes shake{20%,60%{transform:translate(-4px)}40%,80%{transform:translate(4px)}}.features-section{flex-wrap:wrap;justify-content:center;gap:16px;display:flex}.feature-item{background:var(--bg-glass);border:1px solid var(--border-glass);border-radius:var(--radius-md);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);flex:1;align-items:center;gap:10px;min-width:160px;padding:12px 18px;display:flex}.feature-icon{font-size:1.5rem}.feature-text{flex-direction:column;display:flex}.feature-text strong{font-size:.82rem;font-weight:600}.feature-text span{color:var(--text-muted);font-size:.72rem}.home-footer{color:var(--text-muted);text-align:center;margin-top:48px;font-size:.78rem}.settings-btn{z-index:10;background:var(--bg-glass);border:1px solid var(--border-glass);cursor:pointer;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);width:44px;height:44px;transition:all var(--transition);color:var(--text-primary);border-radius:50%;justify-content:center;align-items:center;font-size:1.2rem;display:flex;position:absolute;top:20px;right:20px}.settings-btn:hover{background:#ffffff1a;transform:rotate(45deg)}.settings-input-group{text-align:left;flex-direction:column;gap:8px;margin-bottom:24px;display:flex}.settings-input-group label{color:var(--text-secondary);font-size:.85rem;font-weight:600}.room-page{z-index:1;justify-content:center;align-items:center;min-height:100vh;padding:40px 20px;display:flex;position:relative}.room-container{background:var(--bg-glass);border:1px solid var(--border-glass);border-radius:var(--radius-xl);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);width:100%;max-width:500px;padding:36px 32px}.room-header{align-items:center;gap:16px;margin-bottom:28px;display:flex}.room-header h1{font-family:var(--font-display);text-align:center;flex:1;font-size:1.5rem}.room-code-display{text-align:center;margin-bottom:32px}.room-code-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:2px;font-size:.78rem}.room-code-value{font-family:var(--font-display);letter-spacing:10px;background:var(--gradient-accent);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin:8px 0 16px;font-size:2.8rem;font-weight:900}.room-code-hint{color:var(--text-muted);margin-top:12px;font-size:.8rem}.players-container{flex-direction:column;gap:16px;margin-bottom:28px;display:flex}.player-slot{border:1.5px solid var(--border-glass);border-radius:var(--radius-lg);transition:all var(--transition);background:#0003;align-items:center;gap:16px;padding:20px;display:flex}.player-slot-filled{border-color:#34d3994d}.player-slot-waiting{opacity:.7;border-style:dashed}.player-avatar{font-size:2rem}.player-info{flex-direction:column;gap:4px;display:flex}.player-name{font-size:.95rem;font-weight:600}.player-status{font-size:.78rem}.status-ready{color:var(--accent-green)}.status-waiting{color:var(--text-muted)}.vs-divider{text-align:center;font-family:var(--font-display);color:var(--text-muted);letter-spacing:4px;font-size:1.2rem;font-weight:900}.loading-dots span{animation:1.4s infinite both blink}.loading-dots span:nth-child(2){animation-delay:.2s}.loading-dots 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0;border:none;font-size:1.2rem}.btn-mute:hover{opacity:1}.avatar-svg{transform-origin:bottom;width:48px;height:48px}.avatar-p1{fill:var(--accent-blue);filter:drop-shadow(0 0 8px #4f7cff66)}.avatar-p2{fill:var(--accent-red);filter:drop-shadow(0 0 8px #ef444466)}.anim-idle{animation:3s ease-in-out infinite breathe}@keyframes breathe{0%,to{transform:scale(1)}50%{transform:scale(1.05)translateY(-2px)}}.anim-attack-right{animation:.4s cubic-bezier(.175,.885,.32,1.275) attackRight}@keyframes attackRight{0%{transform:translate(0)scale(1)}50%{filter:brightness(1.5);transform:translate(20px)scale(1.1)}to{transform:translate(0)scale(1)}}.anim-attack-left{animation:.4s cubic-bezier(.175,.885,.32,1.275) attackLeft}@keyframes attackLeft{0%{transform:translate(0)scale(1)}50%{filter:brightness(1.5);transform:translate(-20px)scale(1.1)}to{transform:translate(0)scale(1)}}.anim-hurt{animation:.4s hurtShake}@keyframes 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#00000080;justify-content:center;align-items:center;font-size:.7rem;font-weight:700;display:flex;position:absolute;inset:0}.hud-center{text-align:center;flex-shrink:0;padding:0 20px}.hud-timer{font-family:var(--font-display);background:var(--gradient-accent);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:1.6rem;font-weight:800}.hud-vs{color:var(--text-muted);letter-spacing:3px;font-size:.7rem}.battle-board{flex:1;padding:24px}.board-title{font-family:var(--font-display);color:var(--text-secondary);text-align:center;margin-bottom:20px;font-size:1.1rem}.card-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:14px;max-width:700px;margin:0 auto;display:grid}.question-card{aspect-ratio:3/4;background:var(--bg-card);border:1px solid var(--border-glass);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);flex-direction:column;justify-content:center;align-items:center;gap:12px;padding:16px;display:flex;position:relative;overflow:hidden}.question-card:hover{background:var(--bg-card-hover);box-shadow:var(--shadow-glow);transform:translateY(-4px)}.question-card.answered{opacity:.2;pointer-events:none;filter:grayscale()}.question-card.answered:after{content:"✔️";font-size:2rem;position:absolute}.card-icon{font-size:2rem}.card-difficulty{letter-spacing:2px;border-radius:12px;padding:4px 10px;font-size:.75rem;font-weight:700}.card-difficulty.easy{color:var(--accent-green);background:#34d3991a}.card-difficulty.medium{color:var(--accent-orange);background:#fb923c1a}.card-difficulty.hard{color:var(--accent-pink);background:#f43f8e1a}.card-damage{color:var(--text-muted);font-size:.8rem;font-weight:700}.placeholder-message{text-align:center;color:var(--text-muted);grid-column:1/-1;padding:60px 20px}.placeholder-sub{margin-top:6px;font-size:.82rem}.question-modal,.generic-modal{z-index:100;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#000000b3;justify-content:center;align-items:center;animation:.2s fadeIn;display:flex;position:fixed;inset:0}.question-modal.hidden,.generic-modal.hidden{display:none}.question-modal-content,.generic-modal-content{background:var(--bg-secondary);border:1px solid var(--border-glass);border-radius:var(--radius-xl);text-align:center;width:90%;max-width:460px;padding:36px;animation:.3s slideUp}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.question-header{justify-content:space-between;margin-bottom:20px;display:flex}.question-difficulty{letter-spacing:2px;color:var(--accent-blue);background:#4f7cff26;border-radius:20px;padding:4px 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pulse}.result-title{font-family:var(--font-display);margin-bottom:8px;font-size:3rem;font-weight:900}.result-win .result-title{background:linear-gradient(135deg,#fbbf24,#f59e0b);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.result-lose .result-title{color:var(--text-muted)}.result-draw .result-title{background:var(--gradient-accent);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.result-subtitle{color:var(--text-secondary);margin-bottom:32px;font-size:1.1rem}.result-stats{justify-content:center;gap:16px;margin-bottom:36px;display:flex}.stat-card{background:var(--bg-glass);border:1px solid var(--border-glass);border-radius:var(--radius-lg);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);flex-direction:column;gap:6px;padding:20px 32px;display:flex}.stat-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:1px;font-size:.78rem}.stat-value{font-family:var(--font-display);font-size:2rem;font-weight:800}.result-actions{flex-direction:column;gap:12px;display:flex}.page-404{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:12px;min-height:100vh;display:flex}.page-404 h1{font-family:var(--font-display);background:var(--gradient-primary);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:6rem;font-weight:900}.page-404 p{color:var(--text-secondary);margin-bottom:20px}.connection-indicator .dot.offline{color:var(--accent-red);background:var(--accent-red);animation:1s infinite blink}.connection-overlay{z-index:999;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#0a0a1ad9;justify-content:center;align-items:center;animation:.3s fadeIn;display:flex;position:fixed;inset:0}.connection-overlay.hidden{display:none}.connection-content{text-align:center;color:var(--text-primary);font-family:var(--font-display);font-size:1.5rem;font-weight:700}.connection-content .loading-dots{color:var(--accent-red);margin-bottom:16px;font-size:3rem}@media (width<=600px){.game-title{font-size:2.4rem}.features-section{flex-direction:column}.battle-hud{flex-wrap:wrap;gap:10px;padding:12px 16px}.hud-center{order:-1;width:100%}.hud-player{min-width:0}.hud-info{min-width:80px}.room-code-value{letter-spacing:6px;font-size:2rem}.result-stats{flex-direction:column;align-items:center}}@media (width<=400px){.card-grid{grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:10px}.battle-board{padding:16px 12px}.question-modal-content{padding:24px 20px}.question-text{font-size:1rem}.answer-input{padding:12px}}