body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #050507;
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    sans-serif;
}

.app-container {
  position: relative;
  display: flex;
  height: 100vh;
  width: 100%;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 5rem;
  overflow: hidden;
  padding: 0 2.5rem;
  box-sizing: border-box;
}

@media (max-width: 900px) {
  .app-container {
    flex-direction: column;
    gap: 3rem;
  }
}

.bg-glow {
  pointer-events: none;
  position: absolute;
  width: 100vw;
  height: 100vh;
  background: radial-gradient(
    circle at 50% 50%,
    rgba(255, 255, 255, 0.02) 0%,
    transparent 70%
  );
}

.mouse-cursor {
  pointer-events: none;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 0;
  height: 400px;
  width: 400px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.05) 0%,
    transparent 70%
  );
  mix-blend-mode: screen;
  will-change: transform, opacity;
  opacity: 0;
}

.record-wrapper {
  position: relative;
  width: 100%;
  max-width: 232px;
  aspect-ratio: 1 / 1;
  flex-shrink: 0;
  perspective: 1200px;
  z-index: 10;
}

.record-disc {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 40px 80px rgba(0, 0, 0, 0.6);
  -webkit-mask: radial-gradient(circle at center, transparent 35px, black 36px);
  mask: radial-gradient(circle at center, transparent 35px, black 36px);
  overflow: hidden;
  will-change: transform;
}

.record-grooves {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: repeating-radial-gradient(
    circle at center,
    transparent 0,
    transparent 1.5px,
    rgba(255, 255, 255, 0.03) 2px,
    transparent 3px
  );
  opacity: 0.5;
  pointer-events: none;
}

.spotlight {
  position: absolute;
  inset: 0;
  pointer-events: none;
  transition: opacity 0.5s cubic-bezier(0.2, 0, 0.2, 1);
  z-index: 10;
  opacity: 0;
  mix-blend-mode: screen;
  /* 5가지 색상의 그라데이션 */
  background:
    radial-gradient(
      160px circle at calc(var(--mouse-x) - 70px) calc(var(--mouse-y) - 50px),
      var(--c1),
      transparent 80%
    ),
    radial-gradient(
      180px circle at calc(var(--mouse-x) + 60px) calc(var(--mouse-y) - 30px),
      var(--c2),
      transparent 80%
    ),
    radial-gradient(
      200px circle at calc(var(--mouse-x) - 40px) calc(var(--mouse-y) + 60px),
      var(--c3),
      transparent 80%
    ),
    radial-gradient(
      150px circle at calc(var(--mouse-x) + 30px) calc(var(--mouse-y) + 40px),
      var(--c4),
      transparent 80%
    ),
    radial-gradient(
      220px circle at var(--mouse-x) var(--mouse-y),
      var(--c5),
      transparent 80%
    );
  filter: blur(25px) contrast(1.2);
}

.edge {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  pointer-events: none;
  transition: opacity 0.5s ease;
  z-index: 20;
  opacity: 0;
  padding: 1px;
  background: radial-gradient(
    350px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(255, 255, 255, 0.5),
    transparent 50%
  );
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
}

.record-label-container {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  will-change: transform;
  z-index: 30;
}

.record-label {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 10px;
  box-sizing: border-box;
  background: linear-gradient(145deg, #151518 0%, #050506 100%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.5);
}

.record-label::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #050507;
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.8);
}

.track-num {
  font-size: 8px;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.3);
  letter-spacing: 3px;
  margin-bottom: auto;
  padding-top: 12px;
}

.album-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  line-height: 1.2;
  margin: 0;
  z-index: 2;
  letter-spacing: -0.02em;
}

.artist-name {
  font-size: 8px;
  color: rgba(255, 255, 255, 0.5);
  margin-top: auto;
  padding-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
}