/**
 * Gallery and Media Styles
 * Sabor Con Flow Dance Studio
 *
 * Provides video showcases, image galleries, hero sections, and media overlays.
 * Dependencies: variables.css
 *
 * BREAKPOINTS USED:
 * - 1000px: Gallery layout adjustments
 * - 768px:  Stack to vertical layouts
 * - 600px:  Small mobile adjustments
 * - 480px:  Compact mobile refinements
 */

/* ==========================================================================
   DUAL VIDEO CONTAINER (HOMEPAGE)
   ========================================================================== */

.dual-video-container {
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
  position: relative;
}

.video-item {
  flex: 1;
  max-width: 500px;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.side-video {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  background-color: var(--color-background);
}

/* Ensure poster displays correctly */
.side-video[poster] {
  object-fit: cover;
}

/* ==========================================================================
   VIDEO OVERLAY
   ========================================================================== */

.video-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.9) 0%,
    rgba(0, 0, 0, 0.5) 50%,
    transparent 100%
  );
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  color: var(--color-text-primary);
  padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-lg);
  text-align: center;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.video-item:hover .video-overlay,
.video-item:focus-within .video-overlay {
  opacity: 1;
}

.video-overlay h3 {
  color: var(--color-accent);
  font-family: var(--font-family-heading);
  font-size: 1.4rem;
  margin: 0 0 var(--spacing-sm) 0;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.video-overlay p {
  margin: 0;
  font-size: 1rem;
  opacity: 0.95;
  text-shadow: 0 1px 5px rgba(0, 0, 0, 0.5);
}

/* Fallback for no backdrop-filter */
@supports not (backdrop-filter: blur(4px)) {
  .video-overlay {
    background: linear-gradient(
      to top,
      rgba(0, 0, 0, 0.95) 0%,
      rgba(0, 0, 0, 0.7) 50%,
      transparent 100%
    );
  }
}

/* ==========================================================================
   DANCE GALLERY
   ========================================================================== */

.dance-gallery {
  padding: 0 var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  aspect-ratio: 3 / 2;
  background-color: var(--color-background);
}

.gallery-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-slow);
}

.gallery-item:hover .gallery-image,
.gallery-item:focus-within .gallery-image {
  transform: scale(1.05);
}

/* ==========================================================================
   GALLERY OVERLAY
   ========================================================================== */

.gallery-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.95) 0%,
    rgba(0, 0, 0, 0.7) 40%,
    transparent 100%
  );
  color: var(--color-text-primary);
  padding: var(--spacing-2xl) var(--spacing-lg) var(--spacing-lg);
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

.gallery-item:hover .gallery-overlay,
.gallery-item:focus-within .gallery-overlay {
  transform: translateY(0);
}

/* Overlay content animation */
.gallery-overlay h3 {
  color: var(--color-accent);
  font-family: var(--font-family-heading);
  font-size: 1.3rem;
  margin: 0 0 var(--spacing-sm) 0;
  transform: translateY(20px);
  opacity: 0;
  transition: transform var(--transition-base) 0.1s,
              opacity var(--transition-base) 0.1s;
}

.gallery-overlay p {
  margin: 0;
  font-size: 0.9rem;
  opacity: 0;
  transform: translateY(20px);
  transition: transform var(--transition-base) 0.2s,
              opacity var(--transition-base) 0.2s;
}

.gallery-item:hover .gallery-overlay h3,
.gallery-item:hover .gallery-overlay p,
.gallery-item:focus-within .gallery-overlay h3,
.gallery-item:focus-within .gallery-overlay p {
  transform: translateY(0);
  opacity: 1;
}

/* Overlay icon indicator */
.gallery-overlay::before {
  content: '';
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  width: 32px;
  height: 32px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23bfaa65' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M15 3h6v6M9 21H3v-6M21 3l-7 7M3 21l7-7'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
  opacity: 0;
  transform: scale(0.8);
  transition: opacity var(--transition-base),
              transform var(--transition-base);
}

.gallery-item:hover .gallery-overlay::before,
.gallery-item:focus-within .gallery-overlay::before {
  opacity: 0.8;
  transform: scale(1);
}

/* ==========================================================================
   GRAIN TEXTURE OVERLAY
   ========================================================================== */

.hero-grain,
.grain-overlay {
  position: relative;
}

.hero-grain::after,
.grain-overlay::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
  z-index: 1;
  mix-blend-mode: overlay;
  border-radius: inherit;
}

/* Subtle grain for dark backgrounds */
.grain-subtle::after {
  opacity: 0.02;
}

/* Heavier grain for artistic effect */
.grain-heavy::after {
  opacity: 0.06;
}

/* ==========================================================================
   LAZY LOADING STYLES
   ========================================================================== */

/* Fade-in effect for lazy-loaded images */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity var(--transition-base);
}

img[loading="lazy"].lazy-loaded,
img[loading="lazy"]:not([data-src]) {
  opacity: 1;
}

/* ==========================================================================
   VIDEO SHOWCASE (ALTERNATE LAYOUT)
   ========================================================================== */

.video-showcase {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-lg);
  width: 100%;
  height: calc(100vh - var(--header-height));
  padding: var(--spacing-lg);
  box-sizing: border-box;
}

.video-container {
  flex: 0 1 50%;
  max-width: 500px;
  max-height: 75vh;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.showcase-video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

/* ==========================================================================
   DANCE PHOTOS
   ========================================================================== */

.dance-photos {
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: var(--spacing-lg);
  padding: var(--spacing-sm);
  margin-top: var(--spacing-sm);
  flex-wrap: wrap;
}

.photo-container {
  flex: 0 1 40%;
  max-width: 440px;
  height: auto;
  max-height: 700px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  display: flex;
}

.dance-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

/* ==========================================================================
   LOGO CONTAINER (HOMEPAGE)
   ========================================================================== */

.logo-container {
  margin-top: 15vh;
  text-align: center;
  margin-bottom: 5rem;
}

.main-logo {
  max-width: 80%;
  height: auto;
}

/* ==========================================================================
   HERO SECTION (NON-HOME PAGES)
   ========================================================================== */

.hero-section {
  position: relative;
  width: 100%;
  height: 315px;
  margin-top: var(--header-height);
  overflow: hidden;
  background-color: var(--color-background);
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center bottom;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-overlay);
  pointer-events: none;
}

/* ==========================================================================
   TAGLINE CONTAINER
   ========================================================================== */

.tagline-container {
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-lg);
  margin-top: var(--header-height);
}

.tagline {
  font-family: var(--font-family-heading);
  font-size: 2rem;
  color: var(--color-accent);
  margin: 0;
  line-height: var(--line-height-tight);
}

/* ==========================================================================
   CTA SECTION
   ========================================================================== */

.cta-section {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
  background: linear-gradient(
    to bottom,
    transparent,
    rgba(191, 170, 101, 0.05)
  );
}

.cta-section h2 {
  font-family: var(--font-family-heading);
  font-size: 2.5rem;
  color: var(--color-accent);
  margin: 0 0 var(--spacing-md) 0;
}

.cta-section p {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin: 0 0 var(--spacing-xl) 0;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

/* ==========================================================================
   REDUCED MOTION
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  .gallery-image {
    transition: none;
  }

  .gallery-overlay {
    transform: none;
    opacity: 1;
  }

  .gallery-overlay h3,
  .gallery-overlay p {
    transform: none;
    opacity: 1;
    transition: none;
  }

  .gallery-overlay::before {
    opacity: 0.8;
    transform: none;
    transition: none;
  }

  .video-overlay {
    opacity: 1;
    transition: none;
  }

  img[loading="lazy"] {
    opacity: 1;
    transition: none;
  }

  .hero-grain::after,
  .grain-overlay::after {
    animation: none;
  }
}

/* ==========================================================================
   GALLERY RESPONSIVE
   ========================================================================== */

/* Desktop → Tablet Landscape (1000px) */
@media (max-width: 1000px) {
  .dual-video-container {
    gap: var(--spacing-md);
    padding: var(--spacing-md);
  }

  .video-item {
    max-width: 450px;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }

  .video-showcase {
    gap: var(--spacing-md);
  }

  .video-container {
    max-width: 450px;
  }

  .photo-container {
    max-width: 400px;
  }

  .tagline {
    font-size: 1.75rem;
  }

  .cta-section h2 {
    font-size: 2rem;
  }
}

/* Tablet → Mobile (768px) */
@media (max-width: 768px) {
  .dual-video-container {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
  }

  .video-item {
    max-width: 100%;
    width: 100%;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .gallery-item {
    aspect-ratio: 16 / 10;
  }

  .dance-gallery {
    padding: 0 var(--spacing-md);
  }

  /* Show overlays by default on touch devices */
  .video-overlay {
    opacity: 1;
    background: linear-gradient(
      to top,
      rgba(0, 0, 0, 0.85) 0%,
      rgba(0, 0, 0, 0.4) 60%,
      transparent 100%
    );
  }

  .gallery-overlay {
    transform: translateY(0);
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md);
  }

  .gallery-overlay h3,
  .gallery-overlay p {
    transform: translateY(0);
    opacity: 1;
  }

  .gallery-overlay::before {
    display: none;
  }

  .video-showcase {
    flex-direction: column;
    height: calc(100vh - var(--header-height-mobile));
    padding: var(--spacing-md);
    gap: var(--spacing-md);
  }

  .video-container {
    flex: 0 1 45%;
    max-width: 100%;
    max-height: 50vh;
  }

  .dance-photos {
    flex-direction: column;
    margin-top: 6px;
    align-items: center;
  }

  .photo-container {
    flex: 0 1 100%;
    max-width: 90%;
  }

  .logo-container {
    margin-top: 10vh;
    margin-bottom: 3rem;
  }

  .main-logo {
    max-width: 85%;
  }

  .hero-section {
    height: auto;
    margin-top: var(--header-height-mobile);
  }

  .hero-image {
    max-height: 250px;
  }

  .tagline-container {
    padding: var(--spacing-xl) var(--spacing-md);
    margin-top: var(--header-height-mobile);
  }

  .tagline {
    font-size: 1.5rem;
  }

  .cta-section {
    padding: var(--spacing-2xl) var(--spacing-md);
  }

  .cta-section h2 {
    font-size: 1.75rem;
  }

  .cta-section p {
    font-size: 1rem;
  }
}

/* Mobile → Small Mobile (600px) */
@media (max-width: 600px) {
  .dual-video-container {
    padding: var(--spacing-sm);
    gap: var(--spacing-sm);
  }

  .dance-gallery {
    padding: 0 var(--spacing-sm);
  }

  .gallery-grid {
    gap: var(--spacing-sm);
  }

  .video-overlay h3,
  .gallery-overlay h3 {
    font-size: 1.1rem;
  }

  .video-overlay p,
  .gallery-overlay p {
    font-size: 0.85rem;
  }

  .video-showcase {
    padding: var(--spacing-sm);
    gap: var(--spacing-sm);
  }

  .video-container {
    max-height: 45vh;
  }

  .logo-container {
    margin-top: 8vh;
    margin-bottom: 2.5rem;
  }

  .main-logo {
    max-width: 90%;
  }

  .hero-image {
    max-height: 200px;
  }

  .tagline {
    font-size: 1.25rem;
  }

  .cta-section h2 {
    font-size: 1.5rem;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }
}

/* ==========================================================================
   SINGLE HERO VIDEO (HOMEPAGE)
   ========================================================================== */

.video-showcase--single {
  display: flex;
  justify-content: center;
  align-items: center;
  height: auto;
  gap: 0;
  min-height: calc(100vh - var(--header-height) - 100px);
  padding: var(--spacing-lg);
}

.video-container--hero {
  flex: 0 1 auto;
  max-width: 600px;
  max-height: 85vh;
  width: 100%;
}

.home-cta {
  display: flex;
  justify-content: center;
  padding: var(--spacing-xl) var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.home-cta .btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
}

@media (max-width: 768px) {
  .video-showcase--single {
    height: auto;
    min-height: calc(100vh - var(--header-height-mobile) - 80px);
    padding: var(--spacing-md);
  }

  .video-container--hero {
    max-width: 100%;
    max-height: 70vh;
  }
}

/* ==========================================================================
   GALLERY PAGE SPECIFIC STYLES
   ========================================================================== */

.main-content-gallery {
  padding: var(--spacing-xl) var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
}

.gallery-intro {
  text-align: center;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
  font-size: 1.1rem;
}

/* Gallery Page Thumbnail Grid */
.main-content-gallery .gallery-grid {
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

@media (min-width: 600px) {
  .main-content-gallery .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
  }
}

@media (min-width: 900px) {
  .main-content-gallery .gallery-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Gallery Thumbnail Button */
.gallery-thumbnail {
  width: 100%;
  height: 100%;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  aspect-ratio: 1;
  border-radius: var(--radius-md);
}

.gallery-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.gallery-thumbnail:hover img,
.gallery-thumbnail:focus img {
  transform: scale(1.05);
}

.gallery-thumbnail:focus {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Play Icon Overlay for Video Thumbnails */
.play-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 64px;
  height: 64px;
  background: rgba(0, 0, 0, 0.6);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-primary);
  transition: background-color var(--transition-base), transform var(--transition-base);
  pointer-events: none;
}

.play-icon svg {
  margin-left: 4px; /* Optical centering for play icon */
}

.gallery-thumbnail:hover .play-icon,
.gallery-thumbnail:focus .play-icon {
  background: var(--color-accent);
  transform: translate(-50%, -50%) scale(1.1);
}

/* ==========================================================================
   LIGHTBOX MODAL
   ========================================================================== */

.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox[hidden] {
  display: none;
}

.lightbox-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.95);
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Lightbox Controls */
.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  background: rgba(0, 0, 0, 0.5);
  border: none;
  color: var(--color-text-primary);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-base);
  z-index: 10;
}

.lightbox-close:hover,
.lightbox-close:focus,
.lightbox-prev:hover,
.lightbox-prev:focus,
.lightbox-next:hover,
.lightbox-next:focus {
  background: var(--color-accent);
}

.lightbox-close:focus,
.lightbox-prev:focus,
.lightbox-next:focus {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.lightbox-close {
  top: -50px;
  right: 0;
}

.lightbox-prev {
  left: -60px;
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-next {
  right: -60px;
  top: 50%;
  transform: translateY(-50%);
}

/* Lightbox Media Container */
.lightbox-media {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 100%;
  max-height: 80vh;
}

.lightbox-media img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.lightbox-media video {
  max-width: 100%;
  max-height: 80vh;
  border-radius: var(--radius-sm);
}

.lightbox-caption {
  color: var(--color-text-secondary);
  text-align: center;
  padding: var(--spacing-md) 0;
  font-size: 0.9rem;
}

/* Lightbox Mobile Adjustments */
@media (max-width: 768px) {
  .lightbox-prev {
    left: 10px;
  }

  .lightbox-next {
    right: 10px;
  }

  .lightbox-close {
    top: 10px;
    right: 10px;
  }
}

/* Small Mobile Refinements (480px) */
@media (max-width: 480px) {
  .dual-video-container {
    padding: var(--spacing-xs);
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
  }

  .video-item {
    border-radius: var(--radius-sm);
  }

  .gallery-item {
    border-radius: var(--radius-sm);
  }

  .video-overlay,
  .gallery-overlay {
    padding: var(--spacing-md) var(--spacing-sm) var(--spacing-sm);
  }

  .video-showcase {
    padding: var(--spacing-xs);
    gap: var(--spacing-sm);
  }

  .video-container {
    max-height: 40vh;
    border-radius: var(--radius-sm);
  }

  .photo-container {
    max-width: 95%;
    border-radius: var(--radius-sm);
  }

  .logo-container {
    margin-top: 6vh;
    margin-bottom: 2rem;
  }

  .main-logo {
    max-width: 95%;
  }

  .hero-section {
    margin-top: calc(var(--header-height-mobile) - 10px);
  }

  .hero-image {
    max-height: 180px;
  }

  .cta-section {
    padding: var(--spacing-xl) var(--spacing-sm);
  }
}