body { font-family: sans-serif; display: flex; justify-content: center; align-items: center; height: 100vh; background: #f0f2f5; }
.dialer-container { background: white; padding: 20px; border-radius: 12px; box-shadow: 0 4px 15px rgba(0,0,0,0.1); width: 300px; }
.header { display: flex; align-items: center; margin-bottom: 20px; }
.status-dot { width: 10px; height: 10px; border-radius: 50%; background: grey; margin-right: 8px; }
.status-dot.online { background: #4caf50; }
.status-dot.calling { background: #ff9800; }
.display input { width: 100%; border: none; font-size: 20px; text-align: center; outline: none; margin-bottom: 10px; }
#call-timer { text-align: center; color: #666; font-size: 14px; margin-bottom: 15px; }
.controls { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.btn { border: none; padding: 12px; border-radius: 6px; cursor: pointer; color: white; font-weight: bold; transition: 0.3s; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.success { background: #28a745; grid-column: span 2; }
.danger { background: #dc3545; grid-column: span 2; }
.warning { background: #ffc107; color: #333; }
.hidden { display: none; }