.runeButton {
  --rune-glow: #ffd700;

  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: inherit;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  overflow: visible;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  color: #e0e0e0;
  padding: 0;
  transition: all 0.4s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

.runeButton:hover {
  box-shadow: 0 0 30px var(--rune-glow), 0 0 60px var(--rune-glow);
  transform: translateY(-2px);
}

.runeButton:active {
  transform: translateY(0);
}

.runeButton:focus-visible {
  outline: 2px solid var(--rune-glow);
  outline-offset: 4px;
}

/* Sizes */
.sm {
  border-radius: 6px;
  padding: 0.5rem 1rem;
  min-height: 2.5rem;
}

.sm .runeSvg {
  width: 24px;
  height: 24px;
}

.md {
  border-radius: 8px;
  padding: 0.75rem 1.5rem;
  min-height: 3rem;
}

.md .runeSvg {
  width: 32px;
  height: 32px;
}

.lg {
  border-radius: 12px;
  padding: 1rem 2rem;
  min-height: 3.5rem;
}

.lg .runeSvg {
  width: 40px;
  height: 40px;
}

/* Rune SVG */
.runeSvg {
  flex-shrink: 0;
}

/* Rings */
.ring {
  fill: none;
  stroke: var(--rune-glow);
  stroke-width: 1;
  opacity: 0.3;
  stroke-dasharray: 283;
  stroke-dashoffset: 283;
  transition: stroke-dashoffset 0.8s ease, opacity 0.4s ease;
}

.ringInner {
  fill: none;
  stroke: var(--rune-glow);
  stroke-width: 0.5;
  opacity: 0.2;
  stroke-dasharray: 220;
  stroke-dashoffset: 220;
  transition: stroke-dashoffset 0.6s ease 0.2s, opacity 0.4s ease;
}

.runeButton:hover .ring {
  stroke-dashoffset: 0;
  opacity: 0.8;
  animation: ring-rotate 8s linear infinite;
}

.runeButton:hover .ringInner {
  stroke-dashoffset: 0;
  opacity: 0.6;
  animation: ring-rotate-reverse 6s linear infinite;
}

@keyframes ring-rotate {
  from { transform: rotate(0deg); transform-origin: center; }
  to { transform: rotate(360deg); transform-origin: center; }
}

@keyframes ring-rotate-reverse {
  from { transform: rotate(0deg); transform-origin: center; }
  to { transform: rotate(-360deg); transform-origin: center; }
}

/* Rune symbol */
.runeSymbol {
  fill: var(--rune-glow);
  opacity: 0.5;
  transition: opacity 0.4s ease;
  font-family: serif;
}

.runeButton:hover .runeSymbol {
  opacity: 1;
  animation: symbol-pulse 1.5s ease-in-out infinite;
}

@keyframes symbol-pulse {
  0%, 100% {
    opacity: 1;
    filter: drop-shadow(0 0 5px var(--rune-glow));
  }
  50% {
    opacity: 0.7;
    filter: drop-shadow(0 0 15px var(--rune-glow));
  }
}

/* Content */
.content {
  position: relative;
  z-index: 2;
}

/* Glow overlay */
.glowOverlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, var(--rune-glow) 0%, transparent 70%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
  mix-blend-mode: screen;
  z-index: 1;
}

.runeButton:hover .glowOverlay {
  opacity: 0.15;
}

/* Rune path draw effect on ring */
.runeButton::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: linear-gradient(90deg, transparent, var(--rune-glow), transparent);
  opacity: 0;
  z-index: -1;
  transition: opacity 0.4s ease;
}

.runeButton:hover::before {
  opacity: 0.3;
  animation: border-shimmer 2s linear infinite;
}

@keyframes border-shimmer {
  0% { background-position: -100% 0; }
  100% { background-position: 200% 0; }
}

/* Ancient texture overlay */
.runeButton::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
  border-radius: inherit;
  mix-blend-mode: overlay;
}