body {
  font-family: Arial, sans-serif;
  background: #1e1e1e;
  color: #f1f1f1;
  margin: 0;
}

.time-input {
  width: 260px;
  height: 40px;
  font-size: 18px;
  padding: 0 12px;
  margin-top: 10px;
  margin-bottom: 20px;
  border-radius: 12px;
  border: none;
  background: #1e1e1e;
  color: #f1f1f1;
  box-shadow: 6px 6px 12px #141414, -6px -6px 12px #2a2a2a;
  text-align: center;
}

.time-input:focus {
  outline: none;
  box-shadow: inset 6px 6px 12px #141414, inset -6px -6px 12px #2a2a2a;
}

.btn {
  width: 140px;
  height: 48px;
  font-size: 18px;
  font-weight: bold;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  box-shadow: 6px 6px 12px #141414, -6px -6px 12px #2a2a2a;
}

.btn:hover {
  opacity: 0.9;
  box-shadow: inset 6px 6px 12px #141414, inset -6px -6px 12px #2a2a2a;
}

.green {
  background: #28a745;
  color: #fff;
}

.blue {
  background: #007bff;
  color: #fff;
}

.blinking {
  animation: blinker 1s linear infinite;
  background: #ffc107 !important;
  color: #000 !important;
}

@keyframes blinker {
  50% {
    opacity: 0.3;
  }
}

.circle-wrapper {
  position: relative;
  width: 200px;
  height: 200px;
  margin: 20px auto;
  border-radius: 50%;
  overflow: hidden;
}

.circle-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
}

.timer-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 32px;
  font-family: monospace;
  font-weight: bold;
}

.message-text {
  height: 30px;
  font-size: 18px;
  color: red;
  transition: opacity 0.3s ease;
}