/* ==========================================================================
   BOTONES
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.8rem 1.6rem;
  border-radius: var(--r-full);
  font-weight: 650;
  font-size: 0.94rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  white-space: nowrap;
  transition: transform 0.25s var(--ease-back), box-shadow 0.25s var(--ease),
              background 0.25s, color 0.25s, border-color 0.25s;
}

.btn:active { transform: translateY(1px) scale(0.985); }

/* Brillo que cruza al pasar el cursor */
.btn::after {
  content: '';
  position: absolute;
  top: 0; left: -90%;
  width: 55%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.22), transparent);
  transform: skewX(-22deg);
  transition: left 0.6s var(--ease);
  pointer-events: none;
  z-index: 1;
}
.btn:hover::after { left: 150%; }

/* Onda al hacer clic — la inyecta script.js */
.btn-ripple {
  position: absolute;
  border-radius: 50%;
  width: 10px; height: 10px;
  margin: -5px;
  background: rgba(255, 255, 255, 0.35);
  animation: btn-ripple 0.68s ease-out forwards;
  pointer-events: none;
  z-index: 0;
}
@keyframes btn-ripple {
  from { transform: scale(0);  opacity: 0.65; }
  to   { transform: scale(22); opacity: 0; }
}

/* ── Variantes ────────────────────────────────────────── */

.btn--primary {
  background: linear-gradient(135deg, var(--primary) 0%, #e53935 55%, var(--primary-dark) 100%);
  background-size: 180% 180%;
  color: #fff !important;
  box-shadow: var(--shadow-brand);
}
.btn--primary:hover {
  background-position: 100% 0;
  transform: translateY(-2px);
  box-shadow: 0 10px 32px var(--glow);
}

.btn--outline {
  background: transparent;
  border: 1.5px solid var(--border-strong);
  color: var(--text);
}
.btn--outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--tint);
  transform: translateY(-2px);
}
:root.dark .btn--outline:hover { color: var(--primary-lite); }

.btn--ghost {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-soft);
}
.btn--ghost:hover {
  color: var(--text);
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.btn--sm   { padding: 0.55rem 1.15rem; font-size: 0.85rem; }
.btn--full { width: 100%; margin-top: 0.5rem; }

.btn[disabled] { opacity: 0.6; cursor: not-allowed; transform: none; }
.btn[disabled]::after { display: none; }

/* Enlace con flecha */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
}
:root.dark .link-arrow { color: var(--primary-lite); }
.link-arrow svg { transition: transform 0.25s var(--ease); }
.link-arrow:hover svg { transform: translateX(4px); }

@media (max-width: 640px) {
  .btn { padding: 0.75rem 1.35rem; }
}