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768px){.beat-indicator{width:32px;height:32px}.metronome-settings{padding:var(--spacing-sm)}}.mp3-player-panel{width:360px;background:var(--gray-800);border-left:1px solid var(--gray-700);position:relative;z-index:50;transition:transform var(--transition-base)}.mp3-player-panel.hidden{transform:translate(100%)}.mp3-tracks-list{display:flex;flex-direction:column;gap:var(--spacing-md);max-height:calc(100vh - 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640px){.modal-backdrop{padding:0}.modal-container{max-width:100%;max-height:100vh;border-radius:0}.modal-header{padding:20px 20px 12px}.modal-title{font-size:20px}.modal-content{padding:20px}}@media (prefers-color-scheme: dark){.modal-container{background:#1f2937;color:#f9fafb}.modal-header{border-bottom-color:#374151}.modal-title{color:#f9fafb}.modal-close-btn{color:#9ca3af}.modal-close-btn:hover{background:#374151;color:#f9fafb}}.notifications-container{position:fixed;top:20px;right:20px;z-index:10000;display:flex;flex-direction:column;gap:12px;max-width:400px;pointer-events:none}.notification{display:flex;align-items:flex-start;gap:12px;padding:16px;background:#fff;border-radius:12px;box-shadow:0 4px 12px #00000026;pointer-events:auto;opacity:0;transform:translate(100%);transition:all .3s cubic-bezier(.4,0,.2,1);border-left:4px solid;min-width:300px}.notification-show{opacity:1;transform:translate(0)}.notification-info{border-left-color:#3b82f6;background:linear-gradient(to 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