/**
 * Premium Instrument Buttons
 * プロフェッショナル機材をイメージしたボタンスタイル
 *
 * apps/wordpress-theme/assets/css/premium-instrument-buttons.css と内容を同期すること。
 */

.nn-premium-instrument-btn {
  --nn-instrument-bg: linear-gradient(135deg, #111827 0%, #1f2937 45%, #0f172a 100%);
  --nn-instrument-border: rgba(255, 255, 255, 0.18);
  --nn-instrument-highlight: rgba(236, 72, 153, 0.5);
  --nn-instrument-shadow: rgba(15, 23, 42, 0.55);
  --nn-instrument-radius: 0.85rem;
  --nn-instrument-text: #f9fafb;
  --nn-instrument-glow: rgba(20, 184, 166, 0.65);
  --nn-instrument-led: #4ade80;

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.85rem 1.85rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--nn-instrument-text);
  background: var(--nn-instrument-bg);
  border-radius: var(--nn-instrument-radius);
  border: 1px solid var(--nn-instrument-border);
  text-transform: uppercase;
  position: relative;
  box-shadow: 0 18px 28px -14px var(--nn-instrument-shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.nn-premium-instrument-btn .led-indicator {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(148, 163, 184, 0.45);
  box-shadow: 0 0 0 1px rgba(148, 163, 184, 0.35);
  transition: all 0.3s ease;
}

.nn-premium-instrument-btn::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.24), transparent 60%);
  opacity: 0.75;
  pointer-events: none;
}

.nn-premium-instrument-btn::after {
  content: "";
  position: absolute;
  inset: 2px;
  border-radius: calc(var(--nn-instrument-radius) - 2px);
  background: linear-gradient(140deg, rgba(30, 64, 175, 0.35), rgba(56, 189, 248, 0.2));
  mix-blend-mode: screen;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.nn-premium-instrument-btn:hover {
  transform: translateY(-2px);
  border-color: rgba(236, 72, 153, 0.45);
  box-shadow: 0 24px 32px -16px rgba(14, 116, 144, 0.55);
}

.nn-premium-instrument-btn:hover::after {
  opacity: 1;
}

.nn-premium-instrument-btn:hover .led-indicator {
  background: var(--nn-instrument-led);
  box-shadow: 0 0 18px var(--nn-instrument-led);
}

.nn-premium-instrument-btn:active {
  transform: translateY(1px) scale(0.98);
  box-shadow: 0 10px 18px -12px rgba(15, 23, 42, 0.65);
}

.nn-premium-instrument-btn .nn-btn-label {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.2;
}

.nn-premium-instrument-btn .nn-btn-label span {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  opacity: 0.7;
}

.nn-premium-instrument-btn .nn-btn-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 0 15px rgba(15, 23, 42, 0.75);
}

.nn-premium-instrument-btn .nn-btn-icon svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
  color: var(--nn-instrument-text);
}

.nn-premium-instrument-btn.is-loading .nn-btn-icon::after {
  content: "";
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid rgba(226, 232, 240, 0.35);
  border-top-color: var(--nn-instrument-led);
  animation: nnInstrumentSpin 0.9s linear infinite;
}

.nn-premium-instrument-btn.is-success {
  --nn-instrument-bg: linear-gradient(135deg, #0f172a 0%, #047857 45%, #0f172a 100%);
  --nn-instrument-border: rgba(16, 185, 129, 0.45);
  --nn-instrument-led: #34d399;
}

.nn-premium-instrument-btn.is-warning {
  --nn-instrument-bg: linear-gradient(135deg, #1f2937 0%, #b45309 45%, #1f2937 100%);
  --nn-instrument-border: rgba(234, 179, 8, 0.45);
  --nn-instrument-led: #facc15;
}

.nn-premium-instrument-btn.is-danger {
  --nn-instrument-bg: linear-gradient(135deg, #1f2937 0%, #b91c1c 45%, #1f2937 100%);
  --nn-instrument-border: rgba(248, 113, 113, 0.45);
  --nn-instrument-led: #f87171;
}

.nn-premium-instrument-btn.nn-btn-marshall-amp {
  --nn-instrument-bg: linear-gradient(135deg, #111827 0%, #1f2937 50%, #0b1120 100%);
  --nn-instrument-border: rgba(255, 255, 255, 0.12);
  --nn-instrument-led: #facc15;
}

.nn-premium-instrument-btn.nn-btn-fender-guitar {
  --nn-instrument-bg: linear-gradient(135deg, #0f172a 0%, #0369a1 55%, #1e3a8a 100%);
  --nn-instrument-border: rgba(191, 219, 254, 0.45);
  --nn-instrument-led: #38bdf8;
}

.nn-premium-instrument-btn.nn-btn-roland-synth {
  --nn-instrument-bg: linear-gradient(135deg, #111827 0%, #7c3aed 55%, #4c1d95 100%);
  --nn-instrument-border: rgba(196, 181, 253, 0.45);
  --nn-instrument-led: #c084fc;
}

.nn-premium-instrument-btn.nn-btn-yamaha-piano {
  --nn-instrument-bg: linear-gradient(135deg, #0f172a 0%, #334155 55%, #0f172a 100%);
  --nn-instrument-border: rgba(148, 163, 184, 0.5);
  --nn-instrument-led: #e0f2fe;
}

.nn-premium-instrument-btn.nn-btn-ssl-console {
  --nn-instrument-bg: linear-gradient(135deg, #0f172a 0%, #7f1d1d 45%, #b91c1c 100%);
  --nn-instrument-border: rgba(248, 113, 113, 0.55);
  --nn-instrument-led: #fb7185;
}

@keyframes nnInstrumentSpin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@media (max-width: 640px) {
  .nn-premium-instrument-btn {
    width: 100%;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    gap: 0.5rem;
  }

  .nn-premium-instrument-btn .nn-btn-icon {
    width: 32px;
    height: 32px;
  }

  .nn-premium-instrument-btn .nn-btn-label {
    font-size: 0.875rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .nn-premium-instrument-btn,
  .nn-premium-instrument-btn::after,
  .nn-premium-instrument-btn .led-indicator {
    transition: none;
  }

  .nn-premium-instrument-btn.is-loading .nn-btn-icon::after {
    animation-duration: 0.001ms;
    animation-iteration-count: 1;
  }
}