:root{--bg-deep: hsl(218, 40%, 5%);--bg-well: hsl(218, 38%, 6.5%);--bg-surface: hsl(216, 32%, 9.5%);--bg-elevated: hsl(215, 28%, 13.5%);--bg-switch-active: hsl(214, 26%, 18%);--bg-glass: hsla(216, 34%, 9.5%, .88);--text-primary: hsl(210, 28%, 96%);--text-secondary: hsl(214, 18%, 72%);--text-muted: hsl(215, 14%, 48%);--accent-cyan: hsl(186, 100%, 50%);--accent-cyan-soft: hsla(186, 100%, 50%, .14);--accent-coral: hsl(14, 100%, 60%);--accent-coral-soft: hsla(14, 100%, 60%, .14);--accent-amber: hsl(42, 100%, 54%);--accent-amber-soft: hsla(42, 100%, 54%, .14);--accent-emerald: hsl(156, 85%, 48%);--border-subtle: hsla(210, 25%, 92%, .08);--border-hover: hsla(210, 25%, 92%, .16);--highlight-top: inset 0 1px 0 hsla(210, 35%, 96%, .07);--well-shadow: inset 0 2px 5px rgba(0, 0, 0, .55);--font-display: "Space Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono: "JetBrains Mono", monospace;--radius-xs: 5px;--radius-sm: 7px;--radius-md: 11px;--radius-lg: 15px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{width:100%;min-height:100vh;background-color:var(--bg-deep);background-image:radial-gradient(circle at 12% 16%,hsla(186,90%,42%,.065) 0%,transparent 44%),radial-gradient(circle at 88% 84%,hsla(14,90%,46%,.065) 0%,transparent 44%),linear-gradient(180deg,#080c14,#06090e);color:var(--text-primary);font-family:var(--font-display);-webkit-font-smoothing:antialiased;overflow-x:hidden;-webkit-user-select:none;user-select:none}.app-shell{max-width:1280px;margin:0 auto;padding:.75rem 1.25rem 1rem;display:flex;flex-direction:column;gap:.65rem;min-height:100vh;justify-content:space-between}.top-header{display:flex;flex-direction:column;gap:.65rem;padding:.7rem .9rem;background:linear-gradient(180deg,#121923,#0f141d);border:1px solid var(--border-subtle);border-radius:var(--radius-md);box-shadow:var(--highlight-top),0 14px 32px -12px #000000a6}.header-top-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.75rem;padding-bottom:.55rem;border-bottom:1px solid var(--border-subtle)}.brand-group{display:flex;align-items:center;gap:.7rem}.phase-beacon{width:9px;height:9px;border-radius:50%;background:var(--accent-cyan);box-shadow:0 0 10px var(--accent-cyan);flex-shrink:0;transition:background-color .2s ease,box-shadow .2s ease}.phase-beacon[data-phase=paused]{background:var(--accent-amber);box-shadow:0 0 10px var(--accent-amber)}.phase-beacon[data-phase=gameover]{background:var(--accent-coral);box-shadow:0 0 10px var(--accent-coral)}.brand-text{display:flex;flex-direction:column;gap:.1rem}.brand-title-row{display:flex;align-items:center;gap:.6rem}.brand-title{font-family:var(--font-display);font-size:1.15rem;font-weight:700;letter-spacing:.09em;line-height:1.1;color:var(--text-primary)}.phase-badge{font-family:var(--font-mono);font-size:.6rem;font-weight:700;letter-spacing:.12em;padding:.14rem .45rem;border-radius:4px;background:var(--bg-well);color:var(--accent-cyan);border:1px solid var(--border-subtle)}.phase-badge[data-phase=paused]{color:var(--accent-amber)}.phase-badge[data-phase=gameover]{color:var(--accent-coral)}.brand-subtitle{font-family:var(--font-mono);font-size:.62rem;font-weight:600;letter-spacing:.14em;color:var(--text-muted)}.action-buttons{display:flex;flex-wrap:wrap;align-items:center;gap:.45rem}.action-btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;display:inline-flex;align-items:center;gap:.42rem;background:var(--bg-well);border:1px solid var(--border-subtle);box-shadow:var(--well-shadow);color:var(--text-secondary);font-family:var(--font-mono);font-size:.7rem;font-weight:600;padding:.34rem .55rem .34rem .62rem;border-radius:var(--radius-sm);cursor:pointer;transition:background-color .15s ease,color .15s ease,border-color .15s ease,transform .1s ease,opacity .2s ease}.action-btn:hover{color:var(--text-primary);border-color:var(--border-hover);background:var(--bg-elevated)}.action-btn:active{transform:translateY(1px)}.toggle-led{width:6px;height:6px;border-radius:50%;background:var(--text-muted);opacity:.45;transition:background-color .15s ease,box-shadow .15s ease,opacity .15s ease}.action-btn.active{background:var(--bg-elevated);color:var(--text-primary);box-shadow:var(--highlight-top),0 2px 6px #0006}.action-btn.active .toggle-led{background:var(--accent-cyan);box-shadow:0 0 8px var(--accent-cyan);opacity:1}.toggle-label{letter-spacing:.03em}.toggle-state{font-size:.64rem;font-weight:800;letter-spacing:.06em;padding:.1rem .34rem;border-radius:3px;background:#00000059;color:var(--text-muted);min-width:3.2ch;text-align:center}.action-btn.active .toggle-state{color:var(--accent-cyan);background:var(--accent-cyan-soft)}.btn-kbd{padding:.08rem .3rem;font-size:.58rem;color:var(--text-muted);background:var(--bg-deep);border:1px solid var(--border-subtle);border-radius:3px;margin-left:.1rem}.subtle-btn{color:var(--text-secondary)}.subtle-btn:hover{color:var(--accent-coral)}.control-toolbar{display:grid;grid-template-columns:1.15fr 1.6fr .95fr;gap:.65rem;align-items:stretch}.control-group{display:flex;flex-direction:column;justify-content:space-between;gap:.38rem;padding:.48rem .62rem;background:var(--bg-well);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);box-shadow:var(--well-shadow);transition:opacity .2s ease}.control-group.is-disabled-context,.action-btn.is-disabled-context{opacity:.42}.control-header{display:flex;align-items:center;justify-content:space-between;gap:.5rem}.control-label{font-family:var(--font-mono);font-size:.6rem;font-weight:700;letter-spacing:.11em;color:var(--text-muted)}.control-meta{font-family:var(--font-mono);font-size:.6rem;font-weight:700;letter-spacing:.07em;color:var(--text-secondary);font-variant-numeric:tabular-nums}.segmented-control{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:.22rem;background:var(--bg-deep);padding:.2rem;border-radius:var(--radius-xs);border:1px solid var(--border-subtle)}.seg-btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;display:inline-flex;align-items:center;justify-content:center;gap:.36rem;background:transparent;border:1px solid transparent;color:var(--text-secondary);font-family:var(--font-mono);font-size:.7rem;font-weight:600;padding:.36rem .5rem;border-radius:4px;cursor:pointer;white-space:nowrap;transition:background-color .15s ease,color .15s ease,box-shadow .15s ease,transform .1s ease}.seg-btn:hover{color:var(--text-primary);background:#eff2f50a}.seg-btn:active{transform:translateY(1px)}.seg-btn.active{background:linear-gradient(180deg,var(--bg-switch-active) 0%,var(--bg-elevated) 100%);color:var(--text-primary);border-color:#eff2f51f;box-shadow:var(--highlight-top),0 2px 6px #00000080}.seg-dot{width:5px;height:5px;border-radius:50%;background:var(--text-muted);opacity:.4;transition:background-color .15s ease,box-shadow .15s ease,opacity .15s ease}.seg-btn.active .seg-dot{background:var(--accent-cyan);box-shadow:0 0 6px var(--accent-cyan);opacity:1}.tier-pips{display:inline-flex;align-items:flex-end;gap:2px;height:10px}.tier-pips .pip{display:block;width:2.5px;border-radius:1px;background:#a3b3c233}.tier-pips .pip:nth-child(1){height:4px}.tier-pips .pip:nth-child(2){height:6px}.tier-pips .pip:nth-child(3){height:8px}.tier-pips .pip:nth-child(4){height:10px}.tier-pips .pip.on{background:var(--text-secondary)}.seg-btn.active[data-difficulty=easy] .tier-pips .pip.on{background:var(--accent-emerald)}.seg-btn.active[data-difficulty=medium] .tier-pips .pip.on{background:var(--accent-cyan)}.seg-btn.active[data-difficulty=hard] .tier-pips .pip.on{background:var(--accent-amber)}.seg-btn.active[data-difficulty=unbeatable] .tier-pips .pip.on{background:var(--accent-coral)}.arena-container{display:flex;flex-direction:column;gap:.65rem;flex:1;justify-content:center}.scoreboard-bar{display:grid;grid-template-columns:1fr auto 1fr;align-items:stretch;gap:.85rem;padding:.6rem .9rem;background:linear-gradient(180deg,#121923,#0f141d);border:1px solid var(--border-subtle);border-radius:var(--radius-md);box-shadow:var(--highlight-top),0 10px 24px -10px #0000008c}.player-hud{display:flex;align-items:center;justify-content:space-between;gap:.9rem;padding:.35rem .65rem;background:var(--bg-well);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);box-shadow:var(--well-shadow)}.player-meta{display:flex;flex-direction:column;gap:.24rem;flex:1;min-width:0}.player-meta.align-right{text-align:right;align-items:flex-end}.player-title-line{display:flex;align-items:center;gap:.45rem}.player-title-line.align-right{justify-content:flex-end}.player-dot{width:7px;height:7px;border-radius:50%;flex-shrink:0}.cyan-dot{background:var(--accent-cyan);box-shadow:0 0 8px var(--accent-cyan)}.coral-dot{background:var(--accent-coral);box-shadow:0 0 8px var(--accent-coral)}.player-tag{font-family:var(--font-mono);font-size:.78rem;font-weight:800;letter-spacing:.08em;white-space:nowrap}.cyan-tag{color:var(--accent-cyan)}.coral-tag{color:var(--accent-coral)}.match-point-pill{font-family:var(--font-mono);font-size:.56rem;font-weight:800;letter-spacing:.1em;padding:.1rem .36rem;border-radius:3px;background:var(--accent-cyan-soft);color:var(--accent-cyan)}.match-point-pill.coral-pill{background:var(--accent-coral-soft);color:var(--accent-coral)}.match-point-pill.hidden{display:none}.player-sub{font-family:var(--font-mono);font-size:.63rem;color:var(--text-muted);letter-spacing:.05em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}.score-progress-track{width:100%;max-width:180px;height:4px;background:var(--bg-deep);border-radius:99px;overflow:hidden;margin-top:.1rem;display:flex}.score-progress-track.reverse-track{justify-content:flex-end}.score-progress-fill{height:100%;width:0%;border-radius:99px;transition:width .25s cubic-bezier(.22,1,.36,1)}.cyan-fill{background:var(--accent-cyan);box-shadow:0 0 8px var(--accent-cyan)}.coral-fill{background:var(--accent-coral);box-shadow:0 0 8px var(--accent-coral)}.score-well{display:flex;align-items:center;justify-content:center;min-width:3.9rem;padding:.28rem .55rem;background:var(--bg-deep);border:1px solid var(--border-subtle);border-radius:var(--radius-xs)}.score-digits{font-family:var(--font-mono);font-size:2.15rem;font-weight:800;line-height:1;letter-spacing:-.03em;font-variant-numeric:tabular-nums}.cyan-digits{color:var(--accent-cyan);text-shadow:0 0 20px hsla(186,100%,50%,.32)}.coral-digits{color:var(--accent-coral);text-shadow:0 0 20px hsla(14,100%,60%,.32)}.center-telemetry{display:grid;grid-template-columns:repeat(3,minmax(122px,1fr));gap:.5rem}.telemetry-cell{display:flex;flex-direction:column;justify-content:space-between;gap:.22rem;padding:.38rem .65rem;background:var(--bg-well);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);box-shadow:var(--well-shadow)}.telemetry-cell-top{display:flex;align-items:center;justify-content:space-between;gap:.35rem}.telemetry-caption{font-family:var(--font-mono);font-size:.58rem;font-weight:700;color:var(--text-muted);letter-spacing:.09em}.telemetry-chip{font-family:var(--font-mono);font-size:.56rem;font-weight:700;letter-spacing:.06em;color:var(--text-secondary);font-variant-numeric:tabular-nums}.telemetry-readout{display:flex;align-items:baseline;justify-content:space-between;gap:.3rem}.telemetry-number{font-family:var(--font-mono);font-size:1.15rem;font-weight:800;line-height:1.1;color:var(--text-primary);font-variant-numeric:tabular-nums}.telemetry-unit{font-family:var(--font-mono);font-size:.58rem;font-weight:600;color:var(--text-muted);letter-spacing:.06em}.telemetry-bar-track{width:100%;height:3.5px;background:var(--bg-deep);border-radius:99px;overflow:hidden}.telemetry-bar-fill{height:100%;width:0%;border-radius:99px;transition:width .12s ease-out}.cyan-bar{background:var(--accent-cyan)}.amber-bar{background:var(--accent-amber)}.coral-bar{background:var(--accent-coral)}.canvas-stage{position:relative;width:100%;aspect-ratio:1100 / 620;max-height:62vh;margin:0 auto;background:#06090f;border:1px solid var(--border-subtle);border-radius:var(--radius-lg);overflow:hidden;box-shadow:0 24px 60px -15px #000000c7,inset 0 0 80px #000000a6;display:flex;align-items:center;justify-content:center}#pong-canvas{width:100%;height:100%;display:block}.overlay-panel{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:#06090fbd;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:opacity .2s ease;z-index:10}.overlay-panel.hidden{opacity:0;pointer-events:none}.overlay-card{max-width:520px;width:92%;padding:1.65rem 1.85rem;background:var(--bg-glass);border:1px solid var(--border-hover);border-radius:var(--radius-lg);box-shadow:var(--highlight-top),0 28px 56px #000000b8;text-align:center;display:flex;flex-direction:column;gap:.85rem}.overlay-header-strip{display:flex;flex-direction:column;align-items:center;gap:.45rem}.overlay-kicker{font-family:var(--font-mono);font-size:.68rem;font-weight:700;letter-spacing:.15em;color:var(--accent-cyan)}.overlay-config-pills{display:flex;flex-wrap:wrap;justify-content:center;gap:.35rem}.config-pill{font-family:var(--font-mono);font-size:.6rem;font-weight:700;letter-spacing:.08em;padding:.18rem .5rem;border-radius:4px;background:var(--bg-well);border:1px solid var(--border-subtle);color:var(--text-secondary)}.overlay-title{font-family:var(--font-display);font-size:1.95rem;font-weight:700;letter-spacing:.05em;line-height:1.1;color:var(--text-primary)}.overlay-description{font-size:.88rem;line-height:1.5;color:var(--text-secondary)}.tactical-guide{display:grid;grid-template-columns:repeat(2,1fr);gap:.55rem;text-align:left}.tactical-guide.hidden{display:none}.tactical-item{background:var(--bg-well);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:.6rem .7rem;display:flex;flex-direction:column;gap:.2rem}.tactical-tag{font-family:var(--font-mono);font-size:.6rem;font-weight:800;letter-spacing:.09em;color:var(--accent-amber)}.tactical-text{font-size:.76rem;line-height:1.38;color:var(--text-secondary)}.post-match-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:.55rem;text-align:left}.post-match-stats.hidden{display:none}.stat-box{background:var(--bg-well);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:.6rem .75rem;display:flex;flex-direction:column;gap:.24rem;box-shadow:var(--well-shadow)}.stat-box-head{display:flex;align-items:center;justify-content:space-between;gap:.4rem}.stat-box-label{font-family:var(--font-mono);font-size:.6rem;font-weight:700;letter-spacing:.09em;color:var(--text-muted)}.stat-box-tag{font-family:var(--font-mono);font-size:.55rem;font-weight:700;letter-spacing:.08em;padding:.08rem .32rem;border-radius:3px;background:var(--bg-deep);color:var(--text-secondary)}.stat-box-val{font-family:var(--font-mono);font-size:1.15rem;font-weight:800;color:var(--text-primary);font-variant-numeric:tabular-nums}.overlay-actions{margin-top:.25rem;display:flex;justify-content:center}.primary-cta-btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;background:var(--text-primary);color:var(--bg-deep);border:none;font-family:var(--font-mono);font-size:.82rem;font-weight:800;letter-spacing:.09em;padding:.78rem 1.7rem;border-radius:var(--radius-sm);cursor:pointer;transition:transform .12s ease,background-color .15s ease,box-shadow .15s ease}.primary-cta-btn:hover{background:var(--accent-cyan);box-shadow:0 0 24px #00e5ff73;transform:translateY(-1px)}.primary-cta-btn:active{transform:translateY(0)}.telemetry-footer{display:grid;grid-template-columns:1fr auto;align-items:center;gap:.9rem;padding:.6rem .9rem;background:linear-gradient(180deg,#121923,#0f141d);border:1px solid var(--border-subtle);border-radius:var(--radius-md);box-shadow:var(--highlight-top),0 10px 24px -10px #0000008c}.footer-stats{display:grid;grid-template-columns:repeat(4,minmax(135px,1fr));gap:.55rem}.mini-stat{display:flex;flex-direction:column;justify-content:space-between;gap:.24rem;padding:.42rem .65rem;background:var(--bg-well);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);box-shadow:var(--well-shadow)}.mini-stat-top{display:flex;align-items:center;justify-content:space-between;gap:.35rem}.mini-label{font-family:var(--font-mono);font-size:.58rem;font-weight:700;letter-spacing:.09em;color:var(--text-muted)}.mini-sub{font-family:var(--font-mono);font-size:.55rem;font-weight:600;letter-spacing:.05em;color:var(--text-secondary);font-variant-numeric:tabular-nums}.mini-stat-main{display:flex;align-items:baseline;justify-content:space-between}.mini-value{font-family:var(--font-mono);font-size:.96rem;font-weight:800;color:var(--text-primary);font-variant-numeric:tabular-nums}.mini-meter{width:100%;height:3.5px;background:var(--bg-deep);border-radius:99px;overflow:hidden}.mini-meter-fill{height:100%;width:0%;border-radius:99px;transition:width .2s ease-out}.footer-shortcuts{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:.65rem;padding-left:.4rem}.shortcut-item{font-family:var(--font-mono);font-size:.64rem;color:var(--text-secondary);display:inline-flex;align-items:center;gap:.25rem;white-space:nowrap}kbd{display:inline-block;padding:.12rem .36rem;font-family:var(--font-mono);font-size:.6rem;font-weight:700;color:var(--text-primary);background:var(--bg-elevated);border:1px solid var(--border-hover);border-radius:4px;box-shadow:0 2px #00000080}@media(max-width:1100px){.control-toolbar{grid-template-columns:1fr 1fr}#difficulty-group{grid-column:1 / -1}.telemetry-footer{grid-template-columns:1fr}.footer-shortcuts{justify-content:center;padding-left:0;padding-top:.2rem}}@media(max-width:860px){.control-toolbar{grid-template-columns:1fr}.scoreboard-bar{grid-template-columns:1fr 1fr}.center-telemetry{grid-column:1 / -1;order:3}.footer-stats{grid-template-columns:repeat(2,1fr)}.score-digits{font-size:1.75rem}}@media(max-width:540px){.tactical-guide,.post-match-stats,.footer-stats,.center-telemetry{grid-template-columns:1fr}}