* { box-sizing: border-box; margin: 0; padding: 0; } body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: #000; min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; } .container { background: #fff; border-radius: 20px; padding: 30px; box-shadow: 0 0 0 2px #000; max-width: 400px; width: 100%; } .status-bar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 30px; padding: 15px; background: #fff; border-radius: 10px; border: 2px solid #000; } #connection-status { font-weight: 600; color: #000; } #connection-status.connected { color: #000; font-weight: 800; background: #e0e0e0; padding: 4px 8px; border-radius: 4px; } #device-info { font-size: 14px; color: #000; } .numpad { display: flex; flex-direction: column; gap: 10px; margin-bottom: 30px; } .numpad-row { display: flex; gap: 10px; justify-content: center; } .key { flex: 1; min-width: 60px; height: 60px; border: 2px solid #000; border-radius: 12px; font-size: 20px; font-weight: 600; cursor: pointer; transition: all 0.2s ease; background: #fff; color: #000; } .key:hover { border-width: 3px; } .key:active { background: #000; color: #fff; } .key.pressed { background: #000; color: #fff; border-width: 3px; } .key.operator { background: #f0f0f0; color: #000; border: 3px solid #333; } .key.operator:hover { background: #e0e0e0; border-color: #000; } .key.special { background: #d0d0d0; color: #000; border: 3px solid #555; min-width: 120px; } .key.special:hover { background: #b0b0b0; border-color: #000; } .info-panel { background: #f8f8f8; border-radius: 10px; padding: 20px; border: 2px solid #666; } .info-panel h3 { color: #000; margin-bottom: 15px; font-size: 18px; } .info-panel ul { list-style: none; padding: 0; } .info-panel li { color: #000; margin-bottom: 8px; padding-left: 20px; position: relative; } .info-panel li:before { content: "•"; position: absolute; left: 0; color: #000; font-weight: bold; } @media (max-width: 480px) { .container { padding: 20px; margin: 10px; } .key { min-width: 50px; height: 50px; font-size: 18px; } .key.special { min-width: 100px; } .status-bar { flex-direction: column; gap: 10px; text-align: center; } } @media (hover: none) and (pointer: coarse) { .key { min-width: 70px; height: 70px; font-size: 24px; } .key.special { min-width: 140px; } }