/**
 * Parallax Image Slider - ExtremeFX
 * Brand Colors: Primary Blue #0E4DA7, Deep Navy #031733
 * Static CSS - No build step required
 */

/* ============================================
   CSS CUSTOM PROPERTIES (EASY TO CUSTOMIZE)
   ============================================ */
:root {
  --slider-primary: #0E4DA7;
  --slider-navy: #031733;
  --slider-white: #ffffff;
  --slider-overlay: rgba(3, 23, 51, 0.55);
  --slider-height-desktop: 500px;
  --slider-height-tablet: 400px;
  --slider-height-mobile: 300px;
  --slider-transition-duration: 800ms;
  --slider-parallax-offset: 30px;
  --slider-arrow-size: 48px;
  --slider-dot-size: 12px;
  --slider-caption-bg: rgba(14, 77, 167, 0.85);
}

/* ============================================
   SLIDER CONTAINER
   ============================================ */
.efx-slider {
  position: relative;
  width: 100%;
  height: var(--slider-height-desktop);
  overflow: hidden;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(3, 23, 51, 0.25);
  background-color: var(--slider-navy);
  user-select: none;
  -webkit-user-select: none;
}

/* Focus outline for accessibility */
.efx-slider:focus-visible {
  outline: 3px solid var(--slider-primary);
  outline-offset: 4px;
}

/* ============================================
   SLIDES TRACK & INDIVIDUAL SLIDES
   ============================================ */
.efx-slider__track {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  transition: transform var(--slider-transition-duration) cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: transform;
}

.efx-slider__slide {
  position: relative;
  min-width: 100%;
  height: 100%;
  flex-shrink: 0;
  overflow: hidden;
  cursor: pointer;
}

.efx-slider__slide:focus-visible {
  outline: 3px solid var(--slider-primary);
  outline-offset: -3px;
}

/* ============================================
   PARALLAX IMAGE LAYER
   ============================================ */
.efx-slider__image-wrap {
  position: absolute;
  top: calc(-1 * var(--slider-parallax-offset));
  left: calc(-1 * var(--slider-parallax-offset));
  right: calc(-1 * var(--slider-parallax-offset));
  bottom: calc(-1 * var(--slider-parallax-offset));
  will-change: transform;
  transform: translate3d(0, 0, 0);
}

.efx-slider__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.1s linear;
  will-change: transform;
}

/* ============================================
   OVERLAY & CAPTION
   ============================================ */
.efx-slider__overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    to top,
    var(--slider-overlay) 0%,
    transparent 40%,
    transparent 100%
  );
  pointer-events: none;
  z-index: 2;
}

.efx-slider__caption {
  position: absolute;
  bottom: 24px;
  left: 24px;
  right: 24px;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.efx-slider__title {
  display: inline-block;
  padding: 12px 24px;
  background: var(--slider-caption-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--slider-white);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(3, 23, 51, 0.3);
  transition: transform 0.3s ease, background 0.3s ease;
  pointer-events: auto;
}

.efx-slider__slide:hover .efx-slider__title,
.efx-slider__slide:focus .efx-slider__title {
  transform: translateY(-4px);
  background: var(--slider-primary);
}

.efx-slider__link-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--slider-caption-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 50%;
  color: var(--slider-white);
  transition: transform 0.3s ease, background 0.3s ease;
  pointer-events: none;
}

.efx-slider__slide:hover .efx-slider__link-indicator,
.efx-slider__slide:focus .efx-slider__link-indicator {
  transform: translateX(4px);
  background: var(--slider-primary);
}

.efx-slider__link-indicator svg {
  width: 20px;
  height: 20px;
}

/* ============================================
   NAVIGATION ARROWS
   ============================================ */
.efx-slider__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: var(--slider-arrow-size);
  height: var(--slider-arrow-size);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--slider-caption-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  color: var(--slider-white);
  cursor: pointer;
  transition: all 0.3s ease;
  outline: none;
}

.efx-slider__arrow:hover,
.efx-slider__arrow:focus-visible {
  background: var(--slider-primary);
  border-color: var(--slider-primary);
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 8px 25px rgba(14, 77, 167, 0.4);
}

.efx-slider__arrow:focus-visible {
  outline: 3px solid var(--slider-white);
  outline-offset: 3px;
}

.efx-slider__arrow:active {
  transform: translateY(-50%) scale(0.95);
}

.efx-slider__arrow--prev {
  left: 16px;
}

.efx-slider__arrow--next {
  right: 16px;
}

.efx-slider__arrow svg {
  width: 24px;
  height: 24px;
  stroke-width: 2.5;
}

/* ============================================
   PAGINATION DOTS
   ============================================ */
.efx-slider__dots {
  position: absolute;
  bottom: 90px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  gap: 10px;
  padding: 10px 16px;
  background: rgba(3, 23, 51, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 24px;
}

.efx-slider__dot {
  width: var(--slider-dot-size);
  height: var(--slider-dot-size);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  padding: 0;
  outline: none;
}

.efx-slider__dot:hover {
  background: rgba(255, 255, 255, 0.7);
  transform: scale(1.2);
}

.efx-slider__dot:focus-visible {
  outline: 2px solid var(--slider-white);
  outline-offset: 2px;
}

.efx-slider__dot--active {
  background: var(--slider-primary);
  transform: scale(1.3);
  box-shadow: 0 0 12px rgba(14, 77, 167, 0.6);
}

.efx-slider__dot--active:hover {
  background: var(--slider-primary);
}

/* ============================================
   PAUSE/PLAY INDICATOR
   ============================================ */
.efx-slider__pause-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 10;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(3, 23, 51, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: none;
  border-radius: 50%;
  color: var(--slider-white);
  cursor: pointer;
  transition: all 0.3s ease;
  outline: none;
}

.efx-slider__pause-btn:hover,
.efx-slider__pause-btn:focus-visible {
  background: var(--slider-primary);
  transform: scale(1.1);
}

.efx-slider__pause-btn:focus-visible {
  outline: 2px solid var(--slider-white);
  outline-offset: 2px;
}

.efx-slider__pause-btn svg {
  width: 18px;
  height: 18px;
}

/* Progress bar for autoplay */
.efx-slider__progress {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.2);
  z-index: 10;
  overflow: hidden;
}

.efx-slider__progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--slider-primary), #3B82F6);
  width: 0%;
  transition: width 0.1s linear;
}

.efx-slider--paused .efx-slider__progress-bar {
  transition: none;
}

/* ============================================
   TOUCH SWIPE VISUAL FEEDBACK
   ============================================ */
.efx-slider--dragging .efx-slider__track {
  transition: none;
}

.efx-slider--dragging .efx-slider__slide {
  cursor: grabbing;
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* Tablet */
@media (max-width: 991px) {
  .efx-slider {
    height: var(--slider-height-tablet);
    border-radius: 10px;
  }

  .efx-slider__arrow {
    width: 44px;
    height: 44px;
  }

  .efx-slider__arrow svg {
    width: 20px;
    height: 20px;
  }

  .efx-slider__title {
    font-size: 1.125rem;
    padding: 10px 20px;
  }

  .efx-slider__dots {
    bottom: 80px;
  }
}

/* Mobile */
@media (max-width: 767px) {
  .efx-slider {
    height: var(--slider-height-mobile);
    border-radius: 8px;
  }

  .efx-slider__arrow {
    width: 40px;
    height: 40px;
  }

  .efx-slider__arrow--prev {
    left: 10px;
  }

  .efx-slider__arrow--next {
    right: 10px;
  }

  .efx-slider__arrow svg {
    width: 18px;
    height: 18px;
  }

  .efx-slider__caption {
    bottom: 16px;
    left: 16px;
    right: 16px;
  }

  .efx-slider__title {
    font-size: 1rem;
    padding: 8px 16px;
    border-radius: 6px;
  }

  .efx-slider__link-indicator {
    width: 38px;
    height: 38px;
  }

  .efx-slider__link-indicator svg {
    width: 16px;
    height: 16px;
  }

  .efx-slider__dots {
    bottom: 65px;
    gap: 8px;
    padding: 8px 14px;
  }

  .efx-slider__dot {
    width: 10px;
    height: 10px;
  }

  .efx-slider__pause-btn {
    width: 36px;
    height: 36px;
    top: 12px;
    right: 12px;
  }

  .efx-slider__pause-btn svg {
    width: 14px;
    height: 14px;
  }
}

/* Small Mobile */
@media (max-width: 479px) {
  .efx-slider__caption {
    bottom: 12px;
    left: 12px;
    right: 12px;
  }

  .efx-slider__title {
    font-size: 0.9rem;
    padding: 6px 12px;
  }
}

/* ============================================
   REDUCED MOTION PREFERENCE
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  .efx-slider__track {
    transition: none;
  }

  .efx-slider__image {
    transition: none;
  }

  .efx-slider__title,
  .efx-slider__link-indicator,
  .efx-slider__arrow,
  .efx-slider__dot,
  .efx-slider__pause-btn {
    transition: none;
  }

  .efx-slider__progress-bar {
    transition: none;
  }
}

/* ============================================
   LOADING STATE
   ============================================ */
.efx-slider__slide--loading .efx-slider__image {
  opacity: 0;
}

.efx-slider__slide--loaded .efx-slider__image {
  opacity: 1;
  transition: opacity 0.4s ease;
}

/* Skeleton loading animation */
@keyframes efx-skeleton {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

.efx-slider__skeleton {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    var(--slider-navy) 25%,
    rgba(14, 77, 167, 0.2) 50%,
    var(--slider-navy) 75%
  );
  background-size: 200% 100%;
  animation: efx-skeleton 1.5s infinite;
}

.efx-slider__slide--loaded .efx-slider__skeleton {
  display: none;
}