/**
 * Sticky Mobile CTA Button
 *
 * A floating action button (FAB) that appears on mobile devices to provide
 * quick access to the contact form. Features:
 * - Touch-optimized design (48x48px minimum)
 * - Smooth slide-in animation on scroll
 * - Pulsing animation to draw attention
 * - Material Design shadow and ripple
 * - Slide-up modal with Quick Contact Form
 * - Accessible keyboard navigation
 *
 * @package MSM-Group
 * @version 1.0.0
 */

/* ============================================
   STICKY CTA BUTTON
   ============================================ */

.msm-sticky-cta {
  position: fixed;
  bottom: var(--msm-space-6); /* 24px */
  right: var(--msm-space-4); /* 16px */
  z-index: 1000;

  /* Hidden by default - shown via JavaScript */
  opacity: 0;
  transform: translateY(100px) scale(0.8);
  pointer-events: none;

  transition:
    opacity var(--msm-duration-normal) var(--msm-ease-out),
    transform var(--msm-duration-normal) var(--msm-ease-spring);
}

/* Visible state (controlled by JS) */
.msm-sticky-cta.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

/* FAB Button */
.msm-sticky-cta-button {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;

  width: 64px;
  height: 64px;

  background: var(--msm-gradient-primary);
  color: var(--msm-color-text-inverse);
  border: none;
  border-radius: 50%;
  box-shadow: var(--msm-shadow-xl);

  cursor: pointer;
  overflow: hidden; /* Contain ripple */

  transition:
    transform var(--msm-duration-fast) var(--msm-ease-spring),
    box-shadow var(--msm-duration-fast) var(--msm-ease-out);
}

.msm-sticky-cta-button:hover {
  transform: scale(1.1);
  box-shadow:
    0 20px 30px -10px rgba(0, 180, 217, 0.4),
    0 0 20px rgba(0, 180, 217, 0.3);
}

.msm-sticky-cta-button:active {
  transform: scale(0.95);
}

/* Icon */
.msm-sticky-cta-button i {
  font-size: 24px;
}

/* Pulsing animation to draw attention */
.msm-sticky-cta-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;

  border-radius: 50%;
  background: var(--msm-gradient-primary);

  animation: msm-pulse-ring 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
  opacity: 0;
}

@keyframes msm-pulse-ring {
  0% {
    transform: scale(1);
    opacity: 0.6;
  }
  50% {
    transform: scale(1.3);
    opacity: 0.3;
  }
  100% {
    transform: scale(1.5);
    opacity: 0;
  }
}

/* Optional badge for notifications */
.msm-sticky-cta-badge {
  position: absolute;
  top: 0;
  right: 0;

  display: flex;
  align-items: center;
  justify-content: center;

  min-width: 20px;
  height: 20px;
  padding: 0 6px;

  background: var(--msm-color-danger-500);
  color: var(--msm-color-text-inverse);
  border: 2px solid var(--msm-color-bg-primary);
  border-radius: 10px;

  font-size: var(--msm-font-size-xs);
  font-weight: var(--msm-font-weight-bold);
  line-height: 1;
}

/* ============================================
   SLIDE-UP MODAL
   ============================================ */

.msm-sticky-cta-modal {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1100;

  max-height: 90vh;

  background: var(--msm-color-bg-primary);
  border-radius: var(--msm-radius-lg) var(--msm-radius-lg) 0 0;
  box-shadow: var(--msm-shadow-2xl);

  /* Hidden by default */
  transform: translateY(100%);
  opacity: 0;
  pointer-events: none;

  transition:
    transform var(--msm-duration-slow) var(--msm-ease-spring),
    opacity var(--msm-duration-normal) var(--msm-ease-out);

  /* Scrollable content */
  overflow-y: auto;
  -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
}

/* Open state */
.msm-sticky-cta-modal.is-open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

/* Modal handle (swipe indicator) */
.msm-sticky-cta-modal-handle {
  display: flex;
  justify-content: center;
  padding: var(--msm-space-3) 0;
  cursor: grab;
}

.msm-sticky-cta-modal-handle::before {
  content: '';
  width: 40px;
  height: 4px;
  background: var(--msm-color-border-strong);
  border-radius: 2px;
}

.msm-sticky-cta-modal-handle:active {
  cursor: grabbing;
}

/* Modal header */
.msm-sticky-cta-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--msm-space-4) var(--msm-space-6);
  border-bottom: 1px solid var(--msm-color-border-subtle);
}

.msm-sticky-cta-modal-title {
  margin: 0;
  font-size: var(--msm-font-size-xl);
  font-weight: var(--msm-font-weight-bold);
  color: var(--msm-color-text-primary);
}

/* Close button */
.msm-sticky-cta-modal-close {
  display: flex;
  align-items: center;
  justify-content: center;

  width: 40px;
  height: 40px;

  background: var(--msm-color-bg-secondary);
  color: var(--msm-color-text-secondary);
  border: none;
  border-radius: 50%;

  cursor: pointer;

  transition:
    background var(--msm-duration-fast) var(--msm-ease-out),
    color var(--msm-duration-fast) var(--msm-ease-out),
    transform var(--msm-duration-fast) var(--msm-ease-spring);
}

.msm-sticky-cta-modal-close:hover {
  background: var(--msm-color-bg-tertiary);
  color: var(--msm-color-text-primary);
  transform: rotate(90deg);
}

/* Modal content */
.msm-sticky-cta-modal-content {
  padding: var(--msm-space-6);
}

/* ============================================
   BACKDROP OVERLAY
   ============================================ */

.msm-sticky-cta-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1050;

  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);

  opacity: 0;
  pointer-events: none;

  transition: opacity var(--msm-duration-normal) var(--msm-ease-out);
}

.msm-sticky-cta-backdrop.is-visible {
  opacity: 1;
  pointer-events: auto;
}

/* ============================================
   RESPONSIVE BEHAVIOR
   ============================================ */

/* Hide on desktop (only show on mobile/tablet) */
@media (min-width: 1024px) {
  .msm-sticky-cta {
    display: none;
  }
}

/* Tablet optimization */
@media (min-width: 768px) and (max-width: 1023px) {
  .msm-sticky-cta {
    bottom: var(--msm-space-8); /* 32px */
    right: var(--msm-space-6); /* 24px */
  }

  .msm-sticky-cta-button {
    width: 72px;
    height: 72px;
  }

  .msm-sticky-cta-modal {
    max-width: 600px;
    left: 50%;
    transform: translateX(-50%) translateY(100%);
    border-radius: var(--msm-radius-xl);
  }

  .msm-sticky-cta-modal.is-open {
    transform: translateX(-50%) translateY(0);
  }
}

/* Small mobile devices */
@media (max-width: 374px) {
  .msm-sticky-cta {
    bottom: var(--msm-space-4); /* 16px */
    right: var(--msm-space-3); /* 12px */
  }

  .msm-sticky-cta-button {
    width: 56px;
    height: 56px;
  }

  .msm-sticky-cta-button i {
    font-size: 20px;
  }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

/* Focus styles */
.msm-sticky-cta-button:focus,
.msm-sticky-cta-modal-close:focus {
  outline: 3px solid var(--msm-color-primary-500);
  outline-offset: 2px;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  .msm-sticky-cta,
  .msm-sticky-cta-button,
  .msm-sticky-cta-modal,
  .msm-sticky-cta-backdrop {
    transition: none;
  }

  .msm-sticky-cta-button::before {
    animation: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .msm-sticky-cta-button {
    border: 2px solid currentColor;
  }
}

/* ============================================
   BODY SCROLL LOCK (when modal open)
   ============================================ */

body.msm-sticky-cta-modal-open {
  overflow: hidden;
  /* Prevent background scrolling on iOS */
  position: fixed;
  width: 100%;
}

/* ============================================
   ANIMATION STATES
   ============================================ */

/* Bounce in on first appearance */
@keyframes msm-sticky-cta-bounce-in {
  0% {
    opacity: 0;
    transform: translateY(100px) scale(0.3);
  }
  50% {
    opacity: 1;
    transform: translateY(-10px) scale(1.05);
  }
  70% {
    transform: translateY(5px) scale(0.95);
  }
  100% {
    transform: translateY(0) scale(1);
  }
}

.msm-sticky-cta.is-first-appearance {
  animation: msm-sticky-cta-bounce-in 0.8s var(--msm-ease-spring) forwards;
}

/* Shake attention animation */
@keyframes msm-sticky-cta-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  75% { transform: translateX(8px); }
}

.msm-sticky-cta-button.is-shake {
  animation: msm-sticky-cta-shake 0.5s ease-in-out;
}

/* ============================================
   SAFE AREA INSETS (iOS notch support)
   ============================================ */

@supports (padding-bottom: env(safe-area-inset-bottom)) {
  .msm-sticky-cta {
    bottom: calc(var(--msm-space-6) + env(safe-area-inset-bottom));
  }

  .msm-sticky-cta-modal {
    padding-bottom: env(safe-area-inset-bottom);
  }
}