body {
  font-family: "Avenir Next", "Segoe UI", sans-serif;
}

::selection {
  background: rgba(34, 211, 238, 0.35);
  color: white;
}

.card-surface {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 1.75rem;
  background: rgba(2, 6, 23, 0.78);
  box-shadow: 0 24px 70px rgba(2, 6, 23, 0.45);
  backdrop-filter: blur(16px);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 9999px;
  background: linear-gradient(135deg, #22d3ee, #38bdf8);
  padding: 0.8rem 1.25rem;
  font-weight: 700;
  color: #020617;
  transition: transform 180ms ease, box-shadow 180ms ease, filter 180ms ease;
  box-shadow: 0 16px 35px rgba(6, 182, 212, 0.22);
  min-height: 2.75rem;
}

.btn-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 9999px;
  border: 1px solid rgba(34, 211, 238, 0.35);
  padding: 0.7rem 1rem;
  font-weight: 600;
  color: #67e8f9;
  transition: background-color 180ms ease, color 180ms ease;
  min-height: 2.75rem;
}

.btn-secondary:hover {
  background-color: rgba(34, 211, 238, 0.1);
  color: white;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  border-radius: 9999px;
  border: 1px solid rgba(34, 211, 238, 0.24);
  background: rgba(34, 211, 238, 0.12);
  padding: 0.35rem 0.7rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: #67e8f9;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.status-pill.alt {
  border-color: rgba(251, 191, 36, 0.24);
  background: rgba(251, 191, 36, 0.12);
  color: #fde68a;
}

.progress-fill {
  height: 100%;
  border-radius: 9999px;
  background: linear-gradient(90deg, #22d3ee, #38bdf8);
  transition: width 240ms ease;
}

.audio-shell audio {
  width: 100%;
}

.audio-shell audio::-webkit-media-controls-panel {
  background: rgba(15, 23, 42, 0.9);
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

@media (max-width: 639px) {
  .card-surface {
    border-radius: 1.25rem;
  }

  .audio-shell audio {
    min-height: 3.25rem;
  }
}