.shifter-card max-width: 580px; width: 100%; background: rgba(28, 28, 38, 0.85); backdrop-filter: blur(2px); border-radius: 48px; box-shadow: 0 25px 45px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.05); padding: 28px 24px 36px; transition: all 0.2s ease;
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no"> <title>Real-Time Pitch Shifter | HTML5 Audio Processor</title> <style> * box-sizing: border-box; user-select: none; /* better UX for sliders, but text still selectable if needed */ tai phan mem pitch shifter - html5
.sub font-size: 0.85rem; color: #9aa4bf; margin-bottom: 28px; border-left: 3px solid #3b82f6; padding-left: 12px; font-weight: 400; .shifter-card max-width: 580px