@keyframes headerSlideUp{0%{opacity:0;transform:translateY(40px)}to{opacity:1;transform:translateY(0)}}@keyframes rotateBorder{to{--btn-angle:360deg}}:root{--tuner-target:#21CE98;--tuner-out:#F2005D;--tuner-in:#2AFDC1;--tuner-tint:#F2005D;--page-bg:#0a0a0a;--card-bg:#1c1c1c;--card-border:rgba(255,255,255,0.09);--card-shadow:0 24px 80px rgba(0,0,0,0.6);--text-primary-t:#ffffff;--text-secondary-t:#b4b4bc;--text-muted-t:#85858e;--inst-bg:var(--page-bg);--inst-bg-card:var(--card-bg);--inst-text:var(--text-primary-t);--inst-text-muted:var(--text-secondary-t);--inst-border:var(--card-border);--ti-track:rgba(255,255,255,0.12);--control-bg:#2a2a2a;--control-border:rgba(255,255,255,0.1);--select-arrow:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23ffffff' stroke-width='1.5' fill='none'/%3E%3C/svg%3E")}@media 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var(--card-border);border-radius:24px;box-shadow:var(--card-shadow);padding:1.5rem 1.5rem 2rem;transition:background .3s ease,box-shadow .3s ease,border-color .3s ease;position:relative;overflow:hidden}.metronome-card::before{content:"";position:absolute;inset:0;border-radius:24px;background:radial-gradient(ellipse at 50% 50%,rgba(42,253,193,.15)0,transparent 70%);opacity:0;transition:opacity .5s ease;pointer-events:none;z-index:0}.metronome-card.playing::before{opacity:1}.metronome-card>*{position:relative;z-index:1}.bpm-display{text-align:center;padding:1rem 0 .5rem}.bpm-value{font-size:4rem;font-weight:700;color:var(--tuner-target);line-height:1;font-variant-numeric:tabular-nums;display:block}.bpm-label{font-size:.75rem;font-weight:600;color:var(--text-muted-t);text-transform:uppercase;letter-spacing:.1em;display:block;margin-top:.25rem}.bpm-controls{display:flex;align-items:center;gap:.75rem;margin-bottom:1.25rem}.bpm-slider{flex:1;-webkit-appearance:none;appearance:none;height:6px;background:var(--ti-track);border-radius:3px;outline:0;cursor:pointer}.bpm-slider::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;border-radius:50%;background:var(--tuner-target);border:2px solid var(--card-bg);box-shadow:0 1px 6px rgba(0,0,0,.3);cursor:pointer;transition:transform .12s ease}.bpm-slider::-webkit-slider-thumb:hover{transform:scale(1.15)}.bpm-slider::-moz-range-thumb{width:22px;height:22px;border-radius:50%;background:var(--tuner-target);border:2px solid var(--card-bg);box-shadow:0 1px 6px 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var(--control-border);border-radius:10px;color:var(--text-primary-t);font-family:"Inter",-apple-system,sans-serif;font-size:.875rem;font-weight:600;padding:0 2rem 0 .75rem;appearance:none;-webkit-appearance:none;cursor:pointer;outline:0;transition:border-color .15s;background-image:var(--select-arrow);background-repeat:no-repeat;background-position:right 10px center}.metro-select:focus{border-color:var(--tuner-tint)}.metro-select option{background:var(--card-bg);color:var(--text-primary-t)}.subdiv-btns{display:flex;gap:.25rem}.subdiv-btn{padding:.5rem .75rem;border-radius:8px;background:var(--control-bg);border:1px solid var(--control-border);color:var(--text-secondary-t);font-size:.9375rem;font-weight:600;cursor:pointer;transition:background .15s,color .15s,border-color 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