/**
 * BEM-style Gallery CSS
 * Following the architecture overhaul plan
 */

/* Animation variables */
:root {
  --transition-base: 0.3s;
  --transition-medium: 0.5s;
  --easing-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --color-overlay-bg: rgba(0, 0, 0, 0.8);
  --color-text-light: #ffffff;
  --spacing-standard: 1.5rem;
  --border-radius-small: 4px;
  
  /* Theme pill colors */
  --color-theme-pill: rgba(255, 255, 255, 0.2);
  --color-theme-pill-active: rgba(255, 255, 255, 0.4);
  --color-theme-pill-text: #ffffff;
  --color-theme-pill-shadow: rgba(0, 0, 0, 0.2);
}

/* Keyframe Animations */
@keyframes slideIn {
  from { transform: translateX(-100%); }
  to { transform: translateX(0); }
}

@keyframes slideOut {
  from { transform: translateX(0); }
  to { transform: translateX(-100%); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Unified animation classes */
.animate-slide-in {
  animation: slideIn var(--transition-medium) var(--easing-standard);
  backface-visibility: hidden;
  perspective: 1000px;
}

.animate-slide-out {
  animation: slideOut var(--transition-base) var(--easing-standard);
  backface-visibility: hidden;
  perspective: 1000px;
}

/* Photo Grid Block */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

/* Photo Grid Item */
.photo-grid__item {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius-small);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: transform 0.6s var(--easing-standard), 
              box-shadow 0.6s var(--easing-standard);
  cursor: pointer;
  display: block;
  text-decoration: none;
  color: inherit;
}

.photo-grid__item:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* Photo Grid Image */
.photo-grid__image {
  width: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.8s var(--easing-standard);
}

.photo-grid__item:hover .photo-grid__image {
  transform: scale(1.05);
}

/* Photo Grid Overlay */
.photo-grid__overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-overlay-bg);
  color: var(--color-text-light);
  padding: var(--spacing-standard);
  transform: translateX(-100%);
  transition: transform var(--transition-medium) var(--easing-standard);
  z-index: 10;
  will-change: transform, opacity;
}

.photo-grid__overlay--visible {
  transform: translateX(0);
}

.photo-grid__overlay--exiting {
  transform: translateX(-100%);
  transition: transform var(--transition-base) var(--easing-standard);
}

/* Photo Grid Overlay Content */
.photo-grid__overlay-title {
  margin: 0 0 0.5rem;
  font-size: 1.2rem;
}

.photo-grid__overlay-description {
  margin: 0;
  font-size: 0.9rem;
  opacity: 0.9;
}

/* Close button for overlay */
.photo-grid__overlay-close {
  position: absolute;
  top: 0.5rem;
  right: 0.8rem;
  background: transparent;
  border: none;
  color: var(--color-text-light);
  font-size: 1.8rem;
  line-height: 1;
  padding: 0.3rem 0.6rem;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity var(--transition-base) var(--easing-standard);
  z-index: 11;
}

.photo-grid__overlay-close:hover,
.photo-grid__overlay-close:focus {
  opacity: 1;
  outline: none;
}

/* Theme tags */
.photo-grid__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.photo-grid__tag {
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  padding: 0.2rem 0.6rem;
  font-size: 0.8rem;
  white-space: nowrap;
}

/* Theme Pills Container */
.theme-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

/* Theme Pill */
.theme-pill {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  border-radius: 16px;
  background-color: var(--color-theme-pill);
  color: var(--color-theme-pill-text);
  font-size: 0.85rem;
  cursor: pointer;
  transition: transform var(--transition-base) var(--easing-standard),
              box-shadow var(--transition-base) var(--easing-standard),
              background-color var(--transition-base) var(--easing-standard);
  position: relative;
  overflow: hidden;
  user-select: none;
  touch-action: manipulation;
}

/* Hover state */
.theme-pill:hover {
  transform: translateY(-2px);
  box-shadow: 0 2px 4px var(--color-theme-pill-shadow);
}

/* Active state (for pills that are part of the current theme) */
.theme-pill--active {
  background-color: var(--color-theme-pill-active);
  box-shadow: 0 1px 3px var(--color-theme-pill-shadow);
}

/* Interaction states */
.theme-pill--refining {
  animation: pulse-refine 0.6s var(--easing-standard);
}

.theme-pill--broadening {
  animation: pulse-broaden 0.6s var(--easing-standard);
}

.theme-pill--pivoting {
  animation: pulse-pivot 0.6s var(--easing-standard);
}

/* Animations for interactions */
@keyframes pulse-refine {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); background-color: rgba(33, 150, 243, 0.3); }
  100% { transform: scale(1); }
}

@keyframes pulse-broaden {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); background-color: rgba(76, 175, 80, 0.3); }
  100% { transform: scale(1); }
}

@keyframes pulse-pivot {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); background-color: rgba(255, 152, 0, 0.3); }
  100% { transform: scale(1); }
}

/* Long-press indicator */
.theme-pill--long-press {
  position: relative;
  overflow: hidden;
}

.theme-pill--long-press::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.2);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1s linear;
}

.theme-pill--long-press.active::after {
  transform: scaleX(1);
}

/* Justified Layout Styles */
.gallery {
  position: relative;
  width: 100%;
}

.gallery__photo {
  position: absolute;
  overflow: hidden;
  border-radius: var(--border-radius-small);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.8s var(--easing-standard);
}

.gallery__photo--loaded {
  opacity: 1;
}

.gallery__image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--border-radius-small);
}

/* Photo Viewer */
.photo-viewer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99999;
  overflow: hidden;
  animation: fadeIn 0.8s var(--easing-standard) forwards;
}

.photo-viewer__container {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.photo-viewer__image {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  animation: imageAppear 0.6s var(--easing-standard);
}

@keyframes imageAppear {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Navigation */
.photo-viewer__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.5);
  color: white;
  font-size: 2rem;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity var(--transition-base) var(--easing-standard);
}

.photo-viewer__nav:hover {
  opacity: 1;
}

.photo-viewer__nav--left {
  left: 1rem;
}

.photo-viewer__nav--right {
  right: 1rem;
}

.photo-viewer__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(0, 0, 0, 0.5);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  text-decoration: none;
  transition: background-color 0.6s var(--easing-standard), 
              transform 0.6s var(--easing-standard);
}

.photo-viewer__close:hover {
  background-color: rgba(0, 0, 0, 0.8);
  transform: rotate(90deg);
}

/* Gesture handling classes */
.gesture-active {
  transition: none;
}

.gesture-swipe-left {
  transform: translateX(-30px);
}

.gesture-swipe-right {
  transform: translateX(30px);
}

/* Mobile-specific adjustments */
@media (max-width: 768px) {
  .photo-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
  }
  
  .photo-grid__overlay {
    /* Ensure the overlay is full-width on mobile */
    left: 0;
    right: 0;
    /* Add a subtle shadow for better visibility */
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.2);
    /* Increase padding for better touch targets */
    padding: 1.8rem 1.8rem 2.2rem 1.8rem;
    /* Improve readability */
    font-size: 1.05rem;
    line-height: 1.5;
  }
  
  /* Add a subtle swipe indicator */
  .photo-grid__overlay::after {
    content: "← Swipe to close";
    position: absolute;
    bottom: 0.5rem;
    right: 1rem;
    font-size: 0.8rem;
    opacity: 0.6;
    font-style: italic;
  }
  
  .photo-viewer__nav {
    width: 40px;
    height: 40px;
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .photo-grid {
    grid-template-columns: 1fr;
  }
}

/* Animation for Theme View Transitions */
@keyframes theme-transition {
  0% { opacity: 0.7; transform: scale(0.98); }
  100% { opacity: 1; transform: scale(1); }
}

.theme-transition {
  animation: theme-transition 0.5s var(--easing-standard);
}

/* Poetic transition message */
.theme-transition-message {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 1rem 2rem;
  border-radius: 8px;
  font-size: 1.2rem;
  font-style: italic;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-medium) var(--easing-standard);
  z-index: 1000;
  text-align: center;
}

.theme-transition-message--visible {
  opacity: 1;
}

/* Mobile Adjustments */
@media (max-width: 768px) {
  .theme-pills {
    margin-top: 0.8rem;
  }
  
  .theme-pill {
    padding: 0.4rem 0.9rem;
    font-size: 0.9rem;
  }
  
  /* Add swipe hint for mobile */
  .theme-pill::after {
    content: "↔";
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.7rem;
    opacity: 0.5;
  }
}