/* ============================================================
   Tanpura — Sacred Drone page
   ============================================================ */

.tanpura-page {
  max-width: 68rem;
  margin: 0 auto;
  padding-top: clamp(1.5rem, 4vh, 3rem);
  position: relative;
}

.tanpura-page::before {
  content: "";
  position: absolute;
  inset: -2rem -4rem 0;
  background: radial-gradient(ellipse at 50% 30%, rgba(255, 176, 0, 0.12) 0%, transparent 65%);
  pointer-events: none;
  z-index: -1;
  filter: blur(40px);
}

.tanpura-hero {
  text-align: center;
  padding: 1rem 0 2rem;
}

.tanpura-hero h1 {
  font-family: var(--font-headline);
  font-size: clamp(3rem, 8vw, 5rem);
  color: var(--primary-container);
  margin: 0.5rem 0 1rem;
  text-shadow: 0 0 20px rgba(255, 176, 0, 0.2);
}

.tanpura-hero .hero-copy {
  max-width: 42rem;
  margin: 0 auto;
  color: var(--on-surface-variant);
  line-height: 1.7;
}

.tanpura-shell {
  padding: 2rem;
  background: rgba(28, 27, 27, 0.4);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(82, 69, 51, 0.2);
  border-radius: var(--radius-lg);
  box-shadow:
    inset 0 0 40px rgba(0, 0, 0, 0.5),
    0 40px 100px rgba(0, 0, 0, 0.7);
  display: grid;
  gap: 1.75rem;
}

.tanpura-status {
  margin: 0 auto;
  padding: 0.5rem 1rem;
  background: var(--surface-container-lowest);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-full);
  color: var(--on-surface-variant);
  font-size: 0.85rem;
  text-align: center;
}

/* ---------- Vibrating strings visualization ---------- */
.tanpura-strings {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  min-height: 240px;
  padding: 1.5rem 1rem;
  background:
    linear-gradient(180deg, transparent 0%, rgba(255, 176, 0, 0.03) 50%, transparent 100%);
  border-radius: var(--radius-lg);
  position: relative;
}

.tanpura-string {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  position: relative;
  height: 220px;
  flex: 0 0 auto;
}

.tanpura-string::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 36px;
  width: 2px;
  background: linear-gradient(to bottom,
    transparent 0%,
    rgba(255, 176, 0, 0.2) 20%,
    rgba(255, 186, 67, 0.7) 50%,
    rgba(255, 176, 0, 0.2) 80%,
    transparent 100%);
  box-shadow: 0 0 15px 2px rgba(255, 176, 0, 0.4);
  animation: tanpura-vibrate 2.2s ease-in-out infinite;
}

.tanpura-string:nth-child(2)::before { animation-delay: 0.3s; width: 3px; }
.tanpura-string:nth-child(3)::before { animation-delay: 0.6s; width: 3px; }
.tanpura-string:nth-child(4)::before { animation-delay: 0.9s; width: 4px; }

@keyframes tanpura-vibrate {
  0%, 100% { transform: translateX(-1px); opacity: 0.85; }
  50%      { transform: translateX(1px); opacity: 1; }
}

.tanpura-string__name {
  order: 2;
  font-family: var(--font-body);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--outline);
}

.tanpura-string strong {
  order: 1;
  margin-top: auto;
  font-family: var(--font-headline);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--primary);
  text-shadow: 0 0 12px rgba(255, 176, 0, 0.4);
  min-width: 3rem;
  text-align: center;
}

/* ---------- Controls ---------- */
.tanpura-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 1.25rem;
  padding: 1.5rem;
  background: var(--surface-container-lowest);
  border: 1px solid rgba(82, 69, 51, 0.25);
  border-radius: var(--radius-lg);
  box-shadow: inset 0 2px 12px rgba(0, 0, 0, 0.7);
}

.tanpura-controls label {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--outline);
}

.tanpura-controls select {
  padding: 0.6rem 0.8rem;
  background: var(--surface-container-low);
  color: var(--on-surface);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  letter-spacing: 0;
  text-transform: none;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.6);
  cursor: pointer;
  min-height: 44px;
}

.tanpura-controls select:focus-visible {
  outline: 0;
  border-color: var(--primary);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.6), 0 0 0 2px rgba(255, 176, 0, 0.3);
}

.tanpura-controls input[type="range"] {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: 8px;
  background: var(--surface-container-low);
  border-radius: var(--radius-sm);
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.9);
}

.tanpura-controls input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  background: linear-gradient(145deg, #ffba43, #ffb000);
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.5), 0 0 12px rgba(255, 176, 0, 0.5);
  cursor: pointer;
}

.tanpura-controls input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: linear-gradient(145deg, #ffba43, #ffb000);
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.tanpura-tempo-value {
  font-family: ui-monospace, 'SF Mono', monospace;
  font-size: 0.8rem;
  color: var(--primary-fixed-dim);
  letter-spacing: 0;
  text-transform: none;
}

/* ---------- Resonate toggle ---------- */
.tanpura-action {
  display: flex;
  justify-content: center;
  padding: 0.25rem 0 0.5rem;
}

.tanpura-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2.25rem;
  background: var(--primary-container);
  color: var(--on-primary);
  border: 1px solid rgba(255, 221, 175, 0.5);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font-headline);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  box-shadow:
    inset 0 1px 2px rgba(255, 255, 255, 0.5),
    0 0 20px rgba(255, 176, 0, 0.3);
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  min-height: 52px;
}

.tanpura-toggle:hover {
  background: var(--primary-fixed-dim);
  box-shadow:
    inset 0 1px 2px rgba(255, 255, 255, 0.7),
    0 0 40px rgba(255, 176, 0, 0.55);
}

.tanpura-toggle:active { transform: scale(0.98); }

.tanpura-toggle__dot {
  width: 10px;
  height: 10px;
  background: currentColor;
  border-radius: 50%;
  opacity: 0.8;
}

.tanpura-toggle.is-playing {
  background: transparent;
  color: var(--primary);
  border-color: rgba(255, 176, 0, 0.6);
  box-shadow:
    inset 0 0 20px rgba(255, 176, 0, 0.15),
    0 0 30px rgba(255, 176, 0, 0.25);
}

.tanpura-toggle.is-playing .tanpura-toggle__dot {
  background: var(--primary-container);
  box-shadow: 0 0 10px rgba(255, 176, 0, 0.8);
  animation: tanpura-pulse 1.8s ease-out infinite;
}

@keyframes tanpura-pulse {
  0%   { box-shadow: 0 0 0 0   rgba(255, 176, 0, 0.7); }
  100% { box-shadow: 0 0 0 14px rgba(255, 176, 0, 0); }
}

/* ---------- Explain block ---------- */
.tanpura-explain {
  margin-top: 2.5rem;
  display: grid;
  gap: 1.25rem;
  max-width: 52rem;
  padding: 0 0.5rem;
}

.tanpura-explain h2 {
  color: var(--primary);
  margin: 1rem 0 0;
  font-size: 1.5rem;
}

.tanpura-explain p {
  margin: 0;
  color: var(--on-surface-variant);
  line-height: 1.8;
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .tanpura-string::before,
  .tanpura-toggle.is-playing .tanpura-toggle__dot {
    animation: none;
  }
}

@media (max-width: 520px) {
  .tanpura-page::before {
    inset-inline: 0;
  }

  .tanpura-shell { padding: 1.25rem; }
  .tanpura-strings { gap: 1rem; min-height: 180px; padding: 1rem 0.25rem; }
  .tanpura-string { height: 160px; }
}