/*
  Call to the Moon — howl frequency tuner on the PiDog howl page.
  Night-sky atmosphere, live waveform, and pitch slider.
*/

.howl-tuner {
  --howl-moon-glow: 0.35;
  --howl-moon-scale: 1;

  max-width: 420px;
  margin: 2rem auto 0;
  text-align: center;
}

.howl-tuner-heading {
  font-size: 1.25rem;
  margin-bottom: 0.35rem;
  color: var(--subheader-color);
}

.howl-tuner-intro {
  margin: 0 0 1.25rem;
  font-size: 0.92rem;
  opacity: 0.85;
  line-height: 1.5;
}

/* Night strip with stars + moon */
.howl-sky {
  position: relative;
  height: 110px;
  margin: 0 auto 0.75rem;
  border-radius: 12px;
  background:
    radial-gradient(ellipse 80% 60% at 50% 100%, rgb(45 90 142 / 45%), transparent 70%),
    linear-gradient(180deg, #071018 0%, #0d1b2a 55%, #16324f 100%);
  overflow: hidden;
  border: 1px solid rgb(201 194 186 / 18%);
}

.howl-star {
  position: absolute;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: #f5f0e6;
  opacity: 0.55;
  animation: howl-twinkle 3.2s ease-in-out infinite;
}

.howl-star-1 {
  top: 18%;
  left: 12%;
  animation-delay: 0s;
}

.howl-star-2 {
  top: 32%;
  left: 78%;
  width: 2px;
  height: 2px;
  animation-delay: 0.7s;
}

.howl-star-3 {
  top: 55%;
  left: 22%;
  width: 2px;
  height: 2px;
  animation-delay: 1.4s;
}

.howl-star-4 {
  top: 22%;
  left: 58%;
  animation-delay: 2.1s;
}

.howl-star-5 {
  top: 68%;
  left: 88%;
  width: 2px;
  height: 2px;
  animation-delay: 0.3s;
}

@keyframes howl-twinkle {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 0.9; }
}

.howl-moon {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 52px;
  height: 52px;
  margin: -26px 0 0 -26px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 30%, #fff8e7 0%, #f0d9a8 42%, #e2c07a 100%);
  box-shadow:
    0 0 calc(18px + 40px * var(--howl-moon-glow)) rgb(240 217 168 / calc(0.25 + 0.55 * var(--howl-moon-glow))),
    0 0 calc(40px + 70px * var(--howl-moon-glow)) rgb(250 202 161 / calc(0.12 + 0.35 * var(--howl-moon-glow)));
  transform: scale(var(--howl-moon-scale));
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.howl-moon::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background:
    radial-gradient(circle at 68% 42%, rgb(13 27 42 / 28%) 0 18%, transparent 19%),
    radial-gradient(circle at 40% 62%, rgb(13 27 42 / 18%) 0 12%, transparent 13%);
  pointer-events: none;
}

.howl-wave {
  display: block;
  width: 100%;
  max-width: 420px;
  height: auto;
  margin: 0 auto 1rem;
  border-radius: 10px;
  background: rgb(7 16 24 / 65%);
  border: 1px solid rgb(201 194 186 / 18%);
}

.howl-controls {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.55rem;
}

.howl-freq-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
}

.howl-freq-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-color);
}

.howl-freq-readout {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--subheader-color);
  font-variant-numeric: tabular-nums;
}

.howl-freq {
  width: 100%;
  height: 2rem;
  margin: 0;
  cursor: pointer;
  accent-color: var(--subheader-color);
}

.howl-freq:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 3px;
  border-radius: 4px;
}

.howl-freq-ends {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  opacity: 0.65;
  margin-top: -0.25rem;
}

.howl-status {
  margin: 0.35rem 0 0;
  min-height: 1.4em;
  font-size: 0.88rem;
  font-style: italic;
  opacity: 0.85;
}

.howl-status.is-sweet {
  color: var(--subheader-color);
  font-style: normal;
  font-weight: 600;
  opacity: 1;
}

.howl-toggle {
  align-self: center;
  margin-top: 0.35rem;
  padding: 0.6rem 1.4rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: 'Space Grotesk', system-ui, sans-serif;
  background-color: var(--secondary-color);
  color: var(--text-color);
  border: 1px solid var(--subheader-color);
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.15s ease;
}

.howl-toggle:hover {
  background-color: var(--subheader-color);
  color: var(--primary-color);
  transform: translateY(-1px);
}

.howl-toggle:active {
  transform: translateY(0) scale(0.98);
}

.howl-toggle:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 3px;
}

.howl-toggle.is-on {
  background-color: var(--subheader-color);
  color: var(--primary-color);
}