/**
 * AI-AGENT Button System
 * Consistent button styles across all pages
 * Version: 1.0.0
 */

/* ====================================
   CSS Variables for Button System
   ==================================== */
:root {
  --btn-primary: #1877F2;
  --btn-primary-dark: #0D5BD9;
  --btn-primary-light: #E7F3FF;
  --btn-primary-glow: rgba(24, 119, 242, 0.4);
  --btn-success: #22C55E;
  --btn-success-dark: #16A34A;
  --btn-danger: #EF4444;
  --btn-danger-dark: #DC2626;
  --btn-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ====================================
   Base Button Styles
   ==================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-weight: 600;
  font-size: 14px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: var(--btn-transition);
  text-decoration: none;
  white-space: nowrap;
}

/* ====================================
   Primary CTA Button (Hero/Landing)
   ==================================== */
.cta-primary,
.btn-cta {
  background-color: var(--btn-primary);
  color: white;
  padding: 14px 28px;
  font-weight: 700;
  font-size: 16px;
  border-radius: 12px;
  box-shadow:
    0 4px 15px var(--btn-primary-glow),
    0 2px 4px rgba(0, 0, 0, 0.1);
  position: relative;
  overflow: hidden;
}

.cta-primary::before,
.btn-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.cta-primary:hover,
.btn-cta:hover {
  background-color: var(--btn-primary-dark);
  transform: translateY(-3px);
  box-shadow:
    0 12px 40px var(--btn-primary-glow),
    0 4px 8px rgba(0, 0, 0, 0.15);
}

.cta-primary:hover::before,
.btn-cta:hover::before {
  left: 100%;
}

.cta-primary:active,
.btn-cta:active {
  transform: translateY(-1px);
  box-shadow: 0 4px 15px var(--btn-primary-glow);
}

/* ====================================
   Secondary Button (Outline)
   ==================================== */
.cta-secondary,
.btn-secondary {
  background: transparent;
  color: var(--btn-primary);
  border: 2px solid var(--btn-primary);
  padding: 12px 24px;
}

.cta-secondary:hover,
.btn-secondary:hover {
  background-color: var(--btn-primary-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(24, 119, 242, 0.2);
}

/* ====================================
   Dashboard/Internal Button (Accessible)
   ==================================== */
.btn-accessible {
  background-color: var(--btn-primary-dark);
  color: white;
  padding: 10px 20px;
  font-weight: 600;
}

.btn-accessible:hover {
  background-color: #0A4FC2;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(13, 91, 217, 0.3);
}

/* ====================================
   3D Tilt Button (Eye-catching)
   ==================================== */
.btn-3d {
  background: linear-gradient(135deg, var(--btn-primary) 0%, var(--btn-primary-dark) 100%);
  color: white;
  padding: 16px 32px;
  font-weight: 700;
  font-size: 16px;
  border-radius: 14px;
  transform-style: preserve-3d;
  transition: var(--btn-transition);
  box-shadow:
    0 6px 0 #0A4FC2,
    0 10px 20px rgba(24, 119, 242, 0.3);
  position: relative;
}

.btn-3d:hover {
  transform: translateY(-4px);
  box-shadow:
    0 10px 0 #0A4FC2,
    0 20px 40px rgba(24, 119, 242, 0.4);
}

.btn-3d:active {
  transform: translateY(2px);
  box-shadow:
    0 2px 0 #0A4FC2,
    0 4px 10px rgba(24, 119, 242, 0.2);
}

/* ====================================
   Pulse Animation Button
   ==================================== */
.btn-pulse {
  background-color: var(--btn-primary);
  color: white;
  position: relative;
  animation: btn-pulse 2s ease-in-out infinite;
}

@keyframes btn-pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(24, 119, 242, 0.5);
  }
  50% {
    box-shadow: 0 0 0 15px rgba(24, 119, 242, 0);
  }
}

.btn-pulse:hover {
  animation: none;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(24, 119, 242, 0.4);
}

/* ====================================
   Gradient Shimmer Button
   ==================================== */
.btn-shimmer {
  background: linear-gradient(
    90deg,
    var(--btn-primary) 0%,
    #00D4FF 25%,
    var(--btn-primary) 50%,
    #00D4FF 75%,
    var(--btn-primary) 100%
  );
  background-size: 200% auto;
  color: white;
  font-weight: 700;
  animation: shimmer 3s linear infinite;
}

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

.btn-shimmer:hover {
  animation-duration: 1.5s;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(24, 119, 242, 0.4);
}

/* ====================================
   Icon Buttons
   ==================================== */
.btn-icon {
  padding: 12px;
  border-radius: 10px;
}

.btn-icon svg,
.btn-icon img {
  width: 20px;
  height: 20px;
}

/* ====================================
   Success Button (Green)
   ==================================== */
.btn-success {
  background-color: var(--btn-success);
  color: white;
}

.btn-success:hover {
  background-color: var(--btn-success-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.3);
}

/* ====================================
   Danger Button (Red)
   ==================================== */
.btn-danger {
  background-color: var(--btn-danger);
  color: white;
}

.btn-danger:hover {
  background-color: var(--btn-danger-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

/* ====================================
   Ghost Button (Minimal)
   ==================================== */
.btn-ghost {
  background: transparent;
  color: #374151;
  padding: 10px 16px;
}

.btn-ghost:hover {
  background-color: #F3F4F6;
  color: var(--btn-primary);
}

/* ====================================
   Link Style Button
   ==================================== */
.btn-link {
  background: transparent;
  color: var(--btn-primary);
  padding: 4px 8px;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.btn-link:hover {
  color: var(--btn-primary-dark);
  text-decoration-thickness: 2px;
}

/* ====================================
   Button Sizes
   ==================================== */
.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
  border-radius: 8px;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 18px;
  border-radius: 14px;
}

.btn-xl {
  padding: 20px 40px;
  font-size: 20px;
  border-radius: 16px;
}

/* ====================================
   Full Width Button
   ==================================== */
.btn-block {
  width: 100%;
}

/* ====================================
   Button Group
   ==================================== */
.btn-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-group-vertical {
  flex-direction: column;
}

/* ====================================
   Disabled State
   ==================================== */
.btn:disabled,
.btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
  transform: none !important;
  box-shadow: none !important;
}

/* ====================================
   Loading State
   ==================================== */
.btn.loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn.loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: btn-spin 0.8s linear infinite;
}

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

/* ====================================
   Focus States (Accessibility)
   ==================================== */
.btn:focus-visible {
  outline: 3px solid var(--btn-primary-light);
  outline-offset: 2px;
}

/* ====================================
   3D Tilt Button with Dynamic Glow
   Requires: button-effects.js for JS interactions
   ==================================== */
.btn-3d-tilt {
  --glow-x: 0px;
  --glow-y: 10px;
  --glow-intensity: 0.3;
  --glow-color: rgba(24, 119, 242, var(--glow-intensity));
  transform-style: preserve-3d;
  transition: transform 0.15s ease-out, box-shadow 0.15s ease-out;
  box-shadow:
    0 10px 30px rgba(0, 0, 0, 0.2),
    var(--glow-x) var(--glow-y) 40px var(--glow-color);
  position: relative;
}

.btn-3d-tilt::before {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: inherit;
  background: linear-gradient(
    calc(var(--glow-angle, 45deg)),
    transparent 0%,
    rgba(255, 255, 255, 0.4) 50%,
    transparent 100%
  );
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
}

.btn-3d-tilt:hover {
  --glow-intensity: 0.6;
}

.btn-3d-tilt:hover::before {
  opacity: 1;
}

/* Purple variant for affiliate pages */
.btn-3d-tilt.purple {
  --glow-color: rgba(139, 92, 246, var(--glow-intensity));
}

/* Green variant for success actions */
.btn-3d-tilt.green {
  --glow-color: rgba(34, 197, 94, var(--glow-intensity));
}

/* ====================================
   Dark Mode Support
   ==================================== */
@media (prefers-color-scheme: dark) {
  .btn-ghost {
    color: #D1D5DB;
  }
  .btn-ghost:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
  }
}