/**
 * Sasha Khan — 20-XXVI-SION Eyewear Collection
 * Interactive eyewear showcase with carousel, video, and transition controls
 */

/* ═══════════════════════════════════════════════════════════
   FIXED NAVIGATION BUTTONS
   ═══════════════════════════════════════════════════════════ */

.nav-button {
  position: fixed;
  top: var(--space-lg);
  z-index: 9999;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-havana);
  background: rgba(10, 10, 10, 0.7);
  padding: var(--space-sm) var(--space-md);
  border: 1px solid rgba(196, 167, 125, 0.3);
  transition: background 0.3s var(--ease-luxury),
              color 0.3s var(--ease-luxury),
              border-color 0.3s var(--ease-luxury);
}

.nav-button:hover {
  background: rgba(196, 167, 125, 0.9);
  color: var(--color-noir);
  border-color: var(--color-havana);
}

.nav-button--back {
  left: var(--space-lg);
}

.nav-button--home {
  right: var(--space-lg);
}

@media (max-width: 480px) {
  .nav-button {
    font-size: 10px;
    padding: var(--space-xs) var(--space-sm);
  }

  .nav-button--back {
    left: var(--space-md);
  }

  .nav-button--home {
    right: var(--space-md);
  }
}

/* ═══════════════════════════════════════════════════════════
   HEADER
   ═══════════════════════════════════════════════════════════ */

.xxvi-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  background: linear-gradient(to bottom, rgba(10, 10, 10, 0.95), rgba(10, 10, 10, 0.8), transparent);
  z-index: 100;
}

.xxvi-header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.xxvi-header__link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-havana);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  transition: opacity var(--duration-fast) var(--ease-smooth);
}

.xxvi-header__link:hover {
  opacity: 0.7;
}

.xxvi-header__link svg {
  width: 20px;
  height: 20px;
}

.xxvi-header__title {
  font-family: var(--font-body);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-havana);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
}

.xxvi-header__logo {
  opacity: 0.8;
}

.xxvi-header__spacer {
  width: 40px;
  height: 40px;
}

/* ═══════════════════════════════════════════════════════════
   EYEWEAR SECTION
   ═══════════════════════════════════════════════════════════ */

.eyewear-section {
  min-height: 100vh;
  background-color: var(--color-noir);
  display: flex;
  flex-direction: column;
  padding-top: 80px;
}

/* ═══════════════════════════════════════════════════════════
   LARGE DISPLAY AREA
   ═══════════════════════════════════════════════════════════ */

.eyewear-display {
  position: relative;
  width: 100%;
  height: 60vh;
  min-height: 400px;
  overflow: hidden;
}

.eyewear-display__media {
  position: relative;
  width: 100%;
  height: 100%;
}

.eyewear-display__video,
.eyewear-display__image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 1;
  transition: opacity 0.4s ease-out, visibility 0s 0s;
}

.eyewear-display__video[hidden],
.eyewear-display__image[hidden] {
  display: block !important;
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  transition: opacity 0.4s ease-out, visibility 0s 0.4s;
}

/* ═══════════════════════════════════════════════════════════
   CONTROL BUTTONS
   ═══════════════════════════════════════════════════════════ */

.eyewear-controls {
  position: absolute;
  top: 50%;
  right: var(--space-xl);
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  z-index: 10;
}

.eyewear-controls__btn {
  padding: var(--space-sm) var(--space-lg);
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid var(--color-havana);
  color: var(--color-havana);
  font-family: var(--font-body);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-smooth);
}

.eyewear-controls__btn:hover {
  background: rgba(196, 167, 125, 0.2);
}

.eyewear-controls__btn[hidden] {
  display: none;
}

.eyewear-controls__btn.is-active {
  background: var(--color-havana);
  color: var(--color-noir);
}


/* ═══════════════════════════════════════════════════════════
   CAROUSEL
   ═══════════════════════════════════════════════════════════ */

.eyewear-carousel {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg) var(--space-md);
  gap: var(--space-md);
}

.eyewear-carousel__arrow {
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-havana);
  color: var(--color-havana);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-fast) var(--ease-smooth);
  flex-shrink: 0;
}

.eyewear-carousel__arrow svg {
  width: 22px;
  height: 22px;
}

.eyewear-carousel__arrow:hover {
  background: rgba(196, 167, 125, 0.1);
}

.eyewear-carousel__arrow:active {
  transform: scale(0.95);
}

.eyewear-carousel__track {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  overflow: visible;
  transition: transform 0.4s cubic-bezier(0.19, 1, 0.22, 1);
}

.eyewear-carousel__wrapper {
  overflow: hidden;
  max-width: 700px;
  padding: var(--space-md) 0;
  cursor: grab;
  user-select: none;
}

.eyewear-carousel__wrapper:active {
  cursor: grabbing;
}

.eyewear-carousel__item {
  position: relative;
  flex: 0 0 240px;
  height: 135px; /* 16:9 ratio */
  background: linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 100%);
  border: 1px solid rgba(196, 167, 125, 0.3);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.19, 1, 0.22, 1);
  opacity: 0.4;
  transform: scale(0.9);
}

.eyewear-carousel__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  pointer-events: none;
}

.eyewear-carousel__item.is-active {
  opacity: 1;
  border-color: var(--color-havana);
  transform: scale(1);
}

.eyewear-carousel__item:hover:not(.is-active) {
  opacity: 0.7;
  transform: scale(0.95);
}

/* Transition Icon (half black/white circle) */
.eyewear-carousel__transition-icon {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(90deg, #fff 50%, #000 50%);
  border: 1px solid rgba(196, 167, 125, 0.5);
}

/* ═══════════════════════════════════════════════════════════
   FRAME INFO
   ═══════════════════════════════════════════════════════════ */

.eyewear-info {
  text-align: center;
  padding: var(--space-lg) var(--space-xl);
  max-width: 700px;
  margin: 0 auto;
}

.eyewear-info__name {
  font-family: var(--font-display);
  font-size: var(--font-size-2xl);
  font-weight: 400;
  color: var(--color-havana);
  letter-spacing: var(--letter-spacing-wide);
  margin-bottom: var(--space-sm);
}

.eyewear-info__description {
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-light);
  color: var(--color-ivory);
  line-height: 1.8;
  letter-spacing: 0.02em;
  opacity: 0.85;
}

/* ═══════════════════════════════════════════════════════════
   SECTION DIVIDER
   ═══════════════════════════════════════════════════════════ */

.eyewear-section:not(:last-child)::after {
  content: '';
  display: block;
  width: 200px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-havana) 20%, var(--color-havana) 80%, transparent);
  margin: var(--space-xl) auto;
}

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE STYLES
   ═══════════════════════════════════════════════════════════ */

@media (max-width: 1024px) {
  .eyewear-display {
    height: 50vh;
  }

  .eyewear-controls {
    right: var(--space-lg);
  }

  .eyewear-carousel__item {
    flex: 0 0 200px;
    height: 112px; /* 16:9 ratio */
  }

  .eyewear-carousel__track {
    max-width: 550px;
  }
}

@media (max-width: 768px) {
  .xxvi-header {
    padding: var(--space-sm) var(--space-md);
  }

  .xxvi-header__title {
    font-size: var(--font-size-base);
  }

  .eyewear-display {
    height: 45vh;
    min-height: 300px;
  }

  .eyewear-controls {
    top: auto;
    bottom: var(--space-lg);
    right: var(--space-md);
    transform: none;
    flex-direction: row;
  }

  .eyewear-carousel {
    padding: var(--space-md);
    gap: var(--space-sm);
  }

  .eyewear-carousel__item {
    flex: 0 0 160px;
    height: 90px; /* 16:9 ratio */
  }

  .eyewear-carousel__track {
    max-width: 400px;
    gap: var(--space-sm);
  }

  .eyewear-carousel__arrow {
    width: 36px;
    height: 36px;
  }

  .eyewear-carousel__arrow svg {
    width: 18px;
    height: 18px;
  }

  .eyewear-info {
    padding: var(--space-md);
  }

  .eyewear-info__name {
    font-size: var(--font-size-xl);
  }
}

@media (max-width: 480px) {
  .eyewear-carousel__item {
    flex: 0 0 128px;
    height: 72px; /* 16:9 ratio */
  }

  .eyewear-carousel__track {
    max-width: 320px;
  }

  .eyewear-carousel__transition-icon {
    width: 16px;
    height: 16px;
  }
}

/* ═══════════════════════════════════════════════════════════
   REDUCED MOTION
   ═══════════════════════════════════════════════════════════ */

@media (prefers-reduced-motion: reduce) {
  .eyewear-display__video,
  .eyewear-display__image,
  .eyewear-carousel__item {
    transition: none;
  }
}