* {
  box-sizing: border-box;
}

:root {
  color-scheme: dark;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow: hidden;
  font-family: Arial, Helvetica, sans-serif;
  background: radial-gradient(
    circle at center,
    #252525 0%,
    #111111 55%,
    #050505 100%
  );
}

.button-area {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  perspective: 900px;
}

.sound-button {
  position: relative;
  width: 260px;
  height: 260px;
  border: 18px solid #2d2d2d;
  border-radius: 50%;
  background: radial-gradient(
    circle at 35% 28%,
    #ff7777 0%,
    #f21f1f 32%,
    #a80000 72%
  );
  box-shadow:
    inset 0 10px 18px rgba(255, 255, 255, 0.22),
    inset 0 -18px 25px rgba(70, 0, 0, 0.65),
    0 18px 0 #1b1b1b,
    0 28px 45px rgba(0, 0, 0, 0.75),
    0 0 60px rgba(255, 0, 0, 0.16);
  color: #ffffff;
  font-size: 42px;
  font-weight: 900;
  letter-spacing: 6px;
  text-shadow: 0 3px 4px rgba(0, 0, 0, 0.55);
  cursor: pointer;
  user-select: none;
  transition:
    transform 0.08s ease,
    box-shadow 0.08s ease,
    filter 0.15s ease;
}

.sound-button::before {
  content: "";
  position: absolute;
  inset: -34px;
  z-index: -1;
  border-radius: 50%;
  background: linear-gradient(145deg, #4b4b4b, #161616);
  box-shadow:
    inset 0 4px 6px rgba(255, 255, 255, 0.08),
    inset 0 -8px 14px rgba(0, 0, 0, 0.75),
    0 14px 30px rgba(0, 0, 0, 0.7);
}

.sound-button:hover {
  filter: brightness(1.12);
}

.sound-button:active {
  transform: translateY(14px) scale(0.98);
  box-shadow:
    inset 0 7px 18px rgba(255, 255, 255, 0.18),
    inset 0 -12px 22px rgba(70, 0, 0, 0.62),
    0 5px 0 #1b1b1b,
    0 12px 20px rgba(0, 0, 0, 0.65),
    0 0 40px rgba(255, 0, 0, 0.2);
}

.sound-button:focus-visible {
  outline: 4px solid #ffffff;
  outline-offset: 12px;
}

.count-text {
  margin: 52px 0 0;
  color: #ffffff;
  font-size: 20px;
  font-weight: 700;
}

#button-count {
  font-size: 28px;
}

@media (max-width: 600px) {
  .sound-button {
    width: 210px;
    height: 210px;
    font-size: 34px;
  }
}