/* ========================================
   CSS Custom Properties
   ======================================== */
:root {
  --color-bg: #fafafa;
  --color-text: #1a1a1a;
  --color-text-muted: #666;
  --color-border: #e0e0e0;
  --color-accent: #1a1a1a;
  
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  
  --grid-gap: 60px;
  --grid-cell-size: 280px;
  --grid-columns: 9;
  
  --header-height: 80px;
  --footer-height: 70px;
  
  --transition-fast: 0.2s ease;
  --transition-medium: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  
  --z-header: 100;
  --z-footer: 100;
  --z-lightbox: 200;
  --z-scroll-hint: 50;
}

/* ========================================
   Reset & Base
   ======================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-regular);
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

::selection {
  background: black;
  color: white;
  text-shadow: none;
}

::-moz-selection {
  background: black;
  color: white;
  text-shadow: none;
}

/* ========================================
   Header
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 40px;
  background: linear-gradient(to bottom, var(--color-bg) 60%, transparent);
  z-index: var(--z-header);
  pointer-events: none;
}

.header__about {
  position: absolute;
  left: 40px;
  font-size: 0.9rem;
  font-weight: var(--font-weight-regular);
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  text-decoration: none;
  pointer-events: auto;
  transition: color var(--transition-fast), opacity var(--transition-medium);
}

.header__about:hover {
  color: var(--color-text);
}

.header__instagram {
  position: absolute;
  right: 40px;
  font-size: 0.9rem;
  font-weight: var(--font-weight-regular);
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  text-decoration: none;
  pointer-events: auto;
  transition: color var(--transition-fast), opacity var(--transition-medium);
}

.header__instagram:hover {
  color: var(--color-text);
}

.header__title {
  font-size: 1.25rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  pointer-events: auto;
  line-height: 1;
}

.header__logo {
  height: 35px;
  width: auto;
  display: block;
}

/* ========================================
   About Overlay
   ======================================== */
.about-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-lightbox);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  visibility: hidden;
}

.about-overlay.active {
  pointer-events: auto;
  visibility: visible;
}

.about-overlay.active {
  cursor: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="50" height="20"><text x="0" y="15" font-family="Inter, sans-serif" font-size="14" font-weight="300" fill="%231a1a1a">Close</text></svg>'), auto;
}

.about-content {
  max-width: 600px;
  padding: 0 40px;
  text-align: center;
  cursor: default;
}

.about-text {
  font-size: 1rem;
  font-weight: var(--font-weight-normal);
  line-height: 1.4;
  color: var(--color-text);
  margin-bottom: 30px;
}

.about-links {
  display: flex;
  gap: 24px;
  justify-content: center;
}

.about-links a {
  font-size: 0.9rem;
  font-weight: var(--font-weight-regular);
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.about-links a:hover {
  color: var(--color-text);
}

/* Hide nav links during lightbox/about */
.header__about.hidden,
.header__instagram.hidden {
  opacity: 0;
  pointer-events: none;
}

/* ========================================
   Canvas (2D Scrollable Area)
   ======================================== */
.canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  overflow: auto;
  cursor: grab;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE/Edge */
}

.canvas::-webkit-scrollbar {
  display: none; /* Chrome/Safari */
}

.canvas:active {
  cursor: grabbing;
}

.canvas__inner {
  display: inline-block;
  /* Padding allows scrolling past edges so items 1-2 and 8-9 can scroll into view */
  padding: 100px;
  will-change: transform;
}

/* ========================================
   Grid
   ======================================== */
.grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-columns), var(--grid-cell-size));
  gap: var(--grid-gap);
  transform-origin: center center;
  will-change: transform;
}

/* ========================================
   Artwork Card
   ======================================== */
.artwork {
  position: relative;
  width: var(--grid-cell-size);
  height: var(--grid-cell-size);
  background: transparent;
  border-radius: 0;
  overflow: visible;
  cursor: pointer;
  transition: opacity var(--transition-medium);
  will-change: transform, opacity;
}

.artwork__image-wrapper {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  background: transparent;
}

.artwork__image {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  transition: transform var(--transition-medium);
}

.artwork:hover .artwork__image {
  transform: scale(1.05);
}

.artwork__info {
  display: none;
}

.artwork__title,
.artwork__meta {
  display: none;
}

/* Filtered out state */
.artwork.filtered-out {
  opacity: 0;
  pointer-events: none;
  transform: scale(0.9);
}

/* ========================================
   Lightbox
   ======================================== */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-lightbox);
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.lightbox.active {
  pointer-events: auto;
  opacity: 1;
  visibility: visible;
  cursor: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="50" height="20"><text x="0" y="15" font-family="Inter, sans-serif" font-size="14" font-weight="300" fill="%231a1a1a">Close</text></svg>'), auto;
}

.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: transparent;
  pointer-events: none;
}

.lightbox.active .lightbox__backdrop {
  pointer-events: auto;
}

.lightbox__content {
  position: absolute;
  bottom: calc(var(--footer-height) + 40px);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  pointer-events: none;
}

.lightbox__image {
  display: none;
}

.lightbox__info {
  text-align: center;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-medium) 0.3s, transform var(--transition-medium) 0.3s;
}

.lightbox.active .lightbox__info {
  opacity: 1;
  transform: translateY(0);
}

.lightbox__title {
  font-size: 1.5rem;
  font-weight: var(--font-weight-medium);
  margin-bottom: 8px;
}

.lightbox__meta {
  font-size: 1rem;
  font-weight: var(--font-weight-light);
  color: var(--color-text-muted);
}

.lightbox__close {
  display: none;
}

/* ========================================
   Footer / Filters
   ======================================== */
.footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--footer-height);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(to top, var(--color-bg) 60%, transparent);
  z-index: var(--z-footer);
}

.filters {
  display: flex;
  gap: 8px;
  transition: opacity var(--transition-medium);
  position: absolute;
}

.filters.hidden {
  opacity: 0;
  pointer-events: none;
}

/* Artwork metadata (shown in footer during zoom view) */
.artwork-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-align: center;
  position: absolute;
}

.artwork-meta__title {
  font-size: 1rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.02em;
}

.artwork-meta__details {
  font-size: 0.9rem;
  font-weight: var(--font-weight-light);
  color: var(--color-text-muted);
  text-transform: capitalize;
}

.filter-btn {
  padding: 10px 20px;
  font-family: var(--font-family);
  font-size: 0.85rem;
  font-weight: var(--font-weight-regular);
  letter-spacing: 0.05em;
  text-transform: capitalize;
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 100px;
  cursor: pointer;
  transition: color var(--transition-fast), 
              background var(--transition-fast),
              border-color var(--transition-fast);
}

.filter-btn:hover {
  color: var(--color-text);
}

.filter-btn.active {
  color: var(--color-text);
  background: white;
  border-color: var(--color-border);
}

/* ========================================
   Loading State
   ======================================== */
.artwork__image {
  opacity: 0;
  transition: opacity var(--transition-medium);
}

.artwork__image.loaded {
  opacity: 1;
}


/* ========================================
   Mobile Styles
   ======================================== */
@media (max-width: 768px) {
  :root {
    --grid-cell-size: 160px;
    --grid-gap: 24px;
    --grid-columns: 4;
    --grid-rows: 10;
    --header-height: 60px;
    --footer-height: 60px;
  }
  
  .header {
    padding: 0 20px;
  }
  
  .header__about {
    left: 20px;
    font-size: 0.8rem;
  }
  
  .header__instagram {
    right: 20px;
    font-size: 0.8rem;
  }
  
  .header__title {
    font-size: 1rem;
  }
  
  .about-content {
    padding: 0 24px;
  }
  
  .about-text {
    font-size: 1rem;
  }
  
  .about-links {
    gap: 20px;
  }
  
  .about-links a {
    font-size: 0.8rem;
  }
  
  .about-overlay.active {
    cursor: pointer;
  }
  
  .canvas {
    cursor: auto;
  }
  
  .canvas__inner {
    padding: calc(var(--header-height) + 20px) 20px calc(var(--footer-height) + 20px) 20px;
  }
  
  .artwork:hover .artwork__image {
    transform: none;
  }
  
  .lightbox__title {
    font-size: 1.2rem;
  }
  
  .lightbox__meta {
    font-size: 0.9rem;
  }
  
  .lightbox__close {
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
  }
  
  .filter-btn {
    padding: 8px 14px;
    font-size: 0.75rem;
  }
  
  .scroll-hint {
    display: none;
  }
}

@media (max-width: 480px) {
  :root {
    --grid-cell-size: 140px;
    --grid-gap: 16px;
    --grid-columns: 3;
    --grid-rows: 14;
  }
  
  .filters {
    gap: 4px;
  }
  
  .filter-btn {
    padding: 8px 12px;
    font-size: 0.7rem;
  }
}

/* ========================================
   Reduced Motion
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}