/* =====================================================================
   KINKMATCH UNIFIED BUTTON SYSTEM
   Used by: all pages
   ===================================================================== */

/* === BASE BUTTON === */
.km-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 32px;
  border: none;
  border-radius: 60px;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: box-shadow 0.5s ease, transform 0.3s ease;
  text-decoration: none;
  -webkit-user-select: none;
  user-select: none;
}

.km-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.km-btn:active {
  transform: scale(0.98);
}

.km-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.km-btn:disabled:active {
  transform: none;
}

/* === PRIMARY BUTTON === */
.km-btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-3) 100%);
  color: #fff;
  box-shadow: 0 4px 20px rgba(255, 79, 160, 0.35);
  position: relative;
  overflow: hidden;
  animation: glowPulse 2s ease-in-out infinite;
}

.km-btn-primary::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
  transform: translate(-50%, -50%);
  transition: width 0.5s ease, height 0.5s ease;
  pointer-events: none;
}

.km-btn-primary:hover::before {
  width: 500px;
  height: 500px;
}

.km-btn-primary:hover {
  animation: none;
  box-shadow: 0 6px 24px rgba(255, 79, 160, 0.5);
}

@keyframes glowPulse {
  0%, 100% { box-shadow: 0 4px 20px rgba(255, 79, 160, 0.35); }
  50% { box-shadow: 0 4px 28px rgba(255, 79, 160, 0.5); }
}

/* === SECONDARY BUTTON === */
.km-btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: none;
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.km-btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.85);
  border-color: rgba(255, 255, 255, 0.2);
}

/* Secondary on light backgrounds */
.light-bg .km-btn-secondary,
.km-btn-secondary.light {
  background: rgba(0, 0, 0, 0.05);
  color: rgba(0, 0, 0, 0.6);
  border-color: rgba(0, 0, 0, 0.1);
}

.light-bg .km-btn-secondary:hover,
.km-btn-secondary.light:hover {
  background: rgba(0, 0, 0, 0.1);
  color: rgba(0, 0, 0, 0.8);
  border-color: rgba(0, 0, 0, 0.2);
}

/* === TERTIARY / TEXT BUTTON === */
.km-btn-text {
  background: transparent;
  color: var(--accent);
  padding: 8px 16px;
  box-shadow: none;
  border: none;
  position: relative;
}

.km-btn-text::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 16px;
  right: 16px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform 0.5s ease;
}

.km-btn-text:hover::after {
  transform: scaleX(1);
}

.km-btn-text:active {
  transform: none;
}

/* === DANGER BUTTON === */
.km-btn-danger {
  background: rgba(239, 68, 68, 0.1);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
  box-shadow: none;
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.km-btn-danger:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.5);
  color: #ef4444;
}

/* === NAV OUTLINE BUTTON === */
.km-btn-nav {
  background: transparent;
  border: 2px solid var(--accent);
  color: var(--accent);
  padding: 10px 22px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: none;
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
  margin-left: 8px;
}

.km-btn-nav:hover {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 20px rgba(255, 79, 160, 0.4);
}

/* === SIZE VARIANTS === */
.km-btn-sm {
  padding: 10px 20px;
  font-size: 0.85rem;
}

.km-btn-lg {
  padding: 20px 48px;
  font-size: 1.45rem;
}

/* === MODIFIERS === */
.km-btn-block {
  width: 100%;
}

/* === LOADING STATE === */
.km-btn.loading {
  pointer-events: none;
  opacity: 0.8;
}

.km-btn.loading::after {
  content: '';
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-left: 4px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* === NO ANIMATION VARIANT === */
.km-btn-primary.no-glow {
  animation: none;
}

.km-btn-primary.no-glow:hover {
  box-shadow: 0 6px 24px rgba(255, 79, 160, 0.5);
}


@media (max-width: 480px) {
  /* Increase small button touch target on mobile */
  .km-btn-sm {
    padding: 14px 20px;
    font-size: 0.9rem;
  }
  
  /* Constrain large button width */
  .km-btn-lg {
    padding: 18px 32px;
    font-size: 1.1rem;
  }
  
  /* Default stays the same - already good */
}