/* =========================================================================
   Carpeta Estructural Semántica: button_
   Design System §6 — radius 4px, Share Tech Mono, no letter-spacing.
   Variants via combo classes: .button.is-primary / .is-gold / .is-ghost
   ========================================================================= */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;           /* 10px */
  padding: 0.9375rem 1.625rem; /* 15px 26px */
  border-radius: var(--r-button);
  border: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.9375rem;    /* 15px */
  letter-spacing: 0;
  text-decoration: none;
  position: relative;
  transition: outline 0.15s ease, outline-offset 0.15s ease;
  will-change: transform;
  white-space: nowrap;
  -webkit-user-select: none;
  user-select: none;
}

/* ─── PRIMARY (Celeste) ─── */
.button.is-primary {
  background: var(--c-celeste);
  color: var(--c-canvas);
}
.button.is-primary:hover       { outline: 2px solid var(--c-ghost); outline-offset: 3px; }
.button.is-primary:active      { background: linear-gradient(rgba(255,255,255,0.16), rgba(255,255,255,0.16)), var(--c-celeste); }
.button.is-primary:focus-visible { background: linear-gradient(rgba(7,8,9,0.22), rgba(7,8,9,0.22)), var(--c-celeste); outline: none; }

/* ─── GOLD (Sol de Mayo) — scarce, ≤2 uses ─── */
.button.is-gold {
  background: var(--c-gold);
  color: var(--c-canvas);
}
.button.is-gold:hover       { outline: 2px solid var(--c-ghost); outline-offset: 3px; }
.button.is-gold:active      { background: linear-gradient(rgba(255,255,255,0.16), rgba(255,255,255,0.16)), var(--c-gold); }
.button.is-gold:focus-visible { background: linear-gradient(rgba(7,8,9,0.22), rgba(7,8,9,0.22)), var(--c-gold); outline: none; }

/* ─── GHOST / TEXT ─── */
.button.is-ghost {
  background: none;
  color: var(--c-celeste);
  padding: 0.25rem 0;
}
.button.is-ghost:hover         { color: var(--c-ghost); }
.button.is-ghost:focus-visible { outline: 2px solid var(--c-ghost); outline-offset: 4px; border-radius: 2px; }

/* ─── DISABLED (all variants) ─── */
.button:disabled,
.button[aria-disabled="true"] {
  background: var(--c-shadow-grey) !important;
  color: var(--c-white) !important;
  cursor: not-allowed;
  outline: none !important;
}

/* ─── GLOW pseudo-elements ─── */
.button.is-glow-celeste::before {
  content: '';
  position: absolute;
  inset: -0.875rem;
  border-radius: 0.75rem;
  background: radial-gradient(closest-side, rgba(116,172,223,0.55), rgba(116,172,223,0));
  filter: blur(0.5rem);
  z-index: -1;
  animation: glowPulse 3.2s ease-in-out infinite;
  pointer-events: none;
}

.button.is-glow-gold::before {
  content: '';
  position: absolute;
  inset: -0.875rem;
  border-radius: 0.75rem;
  background: radial-gradient(closest-side, rgba(246,180,14,0.5), rgba(246,180,14,0));
  filter: blur(0.5625rem);
  z-index: -1;
  animation: glowPulse 3.4s ease-in-out infinite;
  pointer-events: none;
}

/* ─── Size override ─── */
.button.is-large {
  padding: 1rem 1.875rem;  /* 16px 30px */
  font-size: 0.9375rem;
}

/* ─── Icon sizing ─── */
.button svg {
  flex: none;
  width: 1.0625rem;        /* 17px */
  height: 1.0625rem;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.25;
  stroke-linecap: round;
  stroke-linejoin: round;
}