/* ==========================================================================
   Marlena Herron Art Camp 2026 — Emoji Mosaic Gallery
   ========================================================================== */

:root {
  --bg-deep: #0a0a0f;
  --bg-purple: #1a0a2e;
  --accent-pink: #ff6b9d;
  --accent-gold: #ffd700;
  --accent-purple: #7b61ff;
  --text-primary: #f8f4ff;
  --text-muted: rgba(248, 244, 255, 0.55);
  --font-display: "Dancing Script", cursive;
  --font-body: "DM Sans", system-ui, sans-serif;
  --font-caption: "Orbitron", monospace;
  --radius: 20px;
  --angle: 0deg;
}

@property --angle {
  syntax: "<angle>";
  initial-value: 0deg;
  inherits: false;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--bg-deep);
  min-height: 100vh;
  overflow-x: hidden;
}

/* --- Sparkle particles --- */
.sparkles {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.sparkle {
  position: absolute;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--accent-gold);
  opacity: 0;
  animation: sparkleFloat linear infinite;
}

@keyframes sparkleFloat {
  0% {
    opacity: 0;
    transform: translateY(0) scale(0.4);
  }
  15% {
    opacity: 0.7;
  }
  100% {
    opacity: 0;
    transform: translateY(-100vh) scale(1);
  }
}

/* --- Page shell --- */
.art-camp-container {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  padding: clamp(1rem, 3vw, 1.5rem);
  background: radial-gradient(ellipse at center, var(--bg-purple) 0%, var(--bg-deep) 70%);
  display: flex;
  flex-direction: column;
  gap: clamp(1rem, 2.5vh, 1.75rem);
}

/* --- Header --- */
.camp-header {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 1rem;
}

.back-nav {
  z-index: 5;
}

.back-button {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.9rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(123, 97, 255, 0.25);
  border-radius: 999px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.back-button:hover {
  color: var(--text-primary);
  border-color: rgba(255, 107, 157, 0.45);
  box-shadow: 0 0 24px rgba(255, 107, 157, 0.15);
}

.camp-header__center {
  text-align: center;
  justify-self: center;
  margin-right: clamp(0px, 8vw, 5rem);
}

.camp-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  background: linear-gradient(120deg, var(--accent-pink), var(--accent-gold), var(--accent-purple));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 20px rgba(255, 107, 157, 0.25));
}

.camp-subtitle {
  margin-top: 0.35rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--accent-gold);
  opacity: 0.8;
}

/* --- Mosaic grid (infinite scroll) --- */
.mosaic-grid {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-auto-rows: minmax(240px, 36vh);
  gap: clamp(0.75rem, 2vw, 1.25rem);
  perspective: 1200px;
}

.mosaic-cell {
  position: relative;
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 107, 157, 0.2);
  border-radius: var(--radius);
  box-shadow:
    0 0 40px rgba(123, 97, 255, 0.1),
    inset 0 0 60px rgba(255, 107, 157, 0.05);
  transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1), border-color 0.6s ease, box-shadow 0.6s ease, opacity 0.5s ease;
  cursor: pointer;
  overflow: hidden;
  min-height: 220px;
  opacity: 0;
  transform: translateY(16px);
}

.mosaic-cell.is-ready {
  opacity: 1;
  transform: translateY(0);
}

.mosaic-cell:nth-child(4n + 1) {
  transform: translateY(16px) rotateX(1deg) rotateY(-0.8deg);
}

.mosaic-cell:nth-child(4n + 2) {
  transform: translateY(16px) rotateX(1deg) rotateY(0.8deg);
}

.mosaic-cell:nth-child(4n + 3) {
  transform: translateY(16px) rotateX(-0.8deg) rotateY(-0.8deg);
}

.mosaic-cell:nth-child(4n) {
  transform: translateY(16px) rotateX(-0.8deg) rotateY(0.8deg);
}

.mosaic-cell.is-ready:nth-child(4n + 1) {
  transform: rotateX(1deg) rotateY(-0.8deg);
}

.mosaic-cell.is-ready:nth-child(4n + 2) {
  transform: rotateX(1deg) rotateY(0.8deg);
}

.mosaic-cell.is-ready:nth-child(4n + 3) {
  transform: rotateX(-0.8deg) rotateY(-0.8deg);
}

.mosaic-cell.is-ready:nth-child(4n) {
  transform: rotateX(-0.8deg) rotateY(0.8deg);
}

.mosaic-cell::before {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: calc(var(--radius) + 2px);
  padding: 2px;
  background: conic-gradient(
    from var(--angle),
    var(--accent-pink),
    var(--accent-purple),
    var(--accent-gold),
    var(--accent-pink)
  );
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: rotateBorder 8s linear infinite;
  opacity: 0.45;
  transition: opacity 0.6s ease;
  pointer-events: none;
  z-index: 1;
}

.mosaic-cell:hover::before,
.mosaic-cell:focus-visible::before {
  opacity: 1;
}

.mosaic-cell.is-ready:hover,
.mosaic-cell.is-ready:focus-visible {
  outline: none;
  transform: scale(1.02) rotate(0.5deg);
  border-color: rgba(255, 215, 0, 0.4);
  box-shadow:
    0 0 80px rgba(255, 107, 157, 0.2),
    0 0 120px rgba(123, 97, 255, 0.1);
  z-index: 2;
}

.mosaic-cell.is-wiggling .emoji-canvas {
  animation: mosaicWiggle 0.55s ease-in-out;
}

.mosaic-cell.is-generating .emoji-canvas {
  opacity: 0.35;
}

.mosaic-cell__skeleton {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 10, 15, 0.45);
  z-index: 1;
  font-size: 2rem;
  animation: bounceEmoji 0.9s ease-in-out infinite alternate;
}

.mosaic-cell.is-ready .mosaic-cell__skeleton {
  display: none;
}

@keyframes rotateBorder {
  to {
    --angle: 360deg;
  }
}

@keyframes mosaicWiggle {
  0%,
  100% {
    transform: translate(0, 0);
  }
  25% {
    transform: translate(2px, -1px);
  }
  50% {
    transform: translate(-2px, 2px);
  }
  75% {
    transform: translate(1px, 1px);
  }
}

.emoji-canvas {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cell-overlay {
  position: absolute;
  inset: auto 0 0;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  background: linear-gradient(transparent, rgba(10, 10, 15, 0.8));
  pointer-events: none;
}

.cell-label {
  font-family: var(--font-caption);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-gold);
}

.cell-actions {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  pointer-events: auto;
}

.download-btn {
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 215, 0, 0.3);
  background: rgba(10, 10, 15, 0.65);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.3s ease, transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.mosaic-cell:hover .download-btn,
.mosaic-cell:focus-within .download-btn,
.download-btn:focus-visible {
  opacity: 1;
  transform: translateY(0);
}

.download-btn:hover,
.download-btn:focus-visible {
  border-color: var(--accent-gold);
  background: rgba(255, 215, 0, 0.15);
}

.download-btn.is-success {
  border-color: #4ade80;
  color: #4ade80;
}

.click-hint {
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  opacity: 0;
  transition: opacity 0.35s ease;
}

.mosaic-cell:hover .click-hint,
.mosaic-cell:focus-visible .click-hint {
  opacity: 1;
  color: var(--accent-pink);
}

/* --- Photo reveal --- */
.photo-reveal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 1.5rem;
}

.photo-reveal.active {
  opacity: 1;
  pointer-events: auto;
}

.photo-reveal__frame {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 100%;
}

.revealed-photo {
  max-width: min(85vw, 1100px);
  max-height: 75vh;
  border-radius: 24px;
  object-fit: contain;
  border: 2px solid rgba(255, 215, 0, 0.3);
  box-shadow:
    0 0 80px rgba(255, 107, 157, 0.3),
    0 0 160px rgba(123, 97, 255, 0.2);
  opacity: 0;
  transform: scale(0.8) rotate(-3deg);
  transition: opacity 1s cubic-bezier(0.34, 1.56, 0.64, 1), transform 1s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.photo-reveal.active .revealed-photo.is-shown {
  opacity: 1;
  transform: scale(1) rotate(0deg);
}

.photo-caption {
  margin-top: 1.25rem;
  color: #fff;
  font-family: var(--font-caption);
  font-size: clamp(0.75rem, 2vw, 0.95rem);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.05);
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 215, 0, 0.2);
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.25rem;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.photo-position {
  color: var(--accent-gold);
  letter-spacing: 0.12em;
  font-size: 0.85em;
}

.reveal-download {
  margin-top: 1rem;
  min-height: 44px;
  padding: 0.55rem 1.2rem;
  border-radius: 999px;
  border: 1px solid rgba(123, 97, 255, 0.4);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: border-color 0.3s ease, background 0.3s ease, transform 0.3s ease;
}

.reveal-download:hover {
  border-color: var(--accent-gold);
  background: rgba(255, 215, 0, 0.12);
  transform: translateY(-1px);
}

.nav-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  font-size: 1.4rem;
  cursor: pointer;
  z-index: 4;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.4s ease, border-color 0.4s ease, transform 0.4s ease, opacity 0.3s ease;
}

.nav-arrow:hover {
  background: rgba(255, 215, 0, 0.15);
  border-color: var(--accent-gold);
  transform: translateY(-50%) scale(1.1);
}

.nav-left {
  left: 20px;
}

.nav-right {
  right: 20px;
}

.close-reveal {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  font-size: 1.35rem;
  cursor: pointer;
  z-index: 3;
  transition: background 0.4s ease, border-color 0.4s ease, transform 0.4s ease;
}

.close-reveal:hover {
  background: rgba(255, 107, 157, 0.2);
  border-color: var(--accent-pink);
  transform: rotate(90deg) scale(1.1);
}

.floating-emoji {
  position: absolute;
  pointer-events: none;
  z-index: 1;
  animation: floatUp var(--dur, 3s) ease-in forwards;
  animation-delay: var(--delay, 0s);
  opacity: 0;
}

@keyframes floatUp {
  0% {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(0deg) scale(0.5);
  }
  20% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translate(-50%, calc(-50% - 280px)) rotate(720deg) scale(1.5);
  }
}

/* --- Loading --- */
.loading-screen {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: var(--bg-deep);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: opacity 0.8s ease;
}

.loading-screen.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.loading-emoji {
  font-size: 4rem;
  animation: bounceEmoji 0.8s ease-in-out infinite alternate;
}

@keyframes bounceEmoji {
  from {
    transform: scale(1) rotate(-5deg);
  }
  to {
    transform: scale(1.2) rotate(5deg);
  }
}

.loading-text {
  color: rgba(255, 255, 255, 0.6);
  font-family: var(--font-body);
  margin-top: 1.25rem;
  letter-spacing: 0.25em;
  font-size: 0.85rem;
  text-transform: uppercase;
}

.loading-progress {
  width: 200px;
  height: 2px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 2px;
  margin-top: 1rem;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-pink), var(--accent-gold), var(--accent-purple));
  border-radius: 2px;
  transition: width 0.3s ease;
}

/* --- Batch loader / end / toast --- */
.batch-loader {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 1.5rem 0 0.5rem;
}

.batch-loader[hidden],
.end-message[hidden],
.toast[hidden] {
  display: none !important;
}

.batch-loader__spinner {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--accent-pink);
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.batch-loader__text {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.end-message {
  text-align: center;
  padding: 2rem 1rem 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  color: var(--accent-gold);
}

.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  z-index: 3000;
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  background: rgba(10, 10, 15, 0.92);
  border: 1px solid rgba(255, 215, 0, 0.35);
  color: var(--text-primary);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  box-shadow: 0 0 30px rgba(255, 107, 157, 0.2);
  opacity: 0;
  transition: opacity 0.35s ease, transform 0.35s ease;
  pointer-events: none;
}

.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* --- Responsive --- */
@media (max-width: 720px) {
  .camp-header {
    grid-template-columns: 1fr;
  }

  .camp-header__center {
    margin-right: 0;
    order: 2;
  }

  .back-nav {
    order: 1;
  }

  .mosaic-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: minmax(240px, 32vh);
    perspective: none;
  }

  .mosaic-cell,
  .mosaic-cell:nth-child(n),
  .mosaic-cell.is-ready:nth-child(n) {
    transform: none;
  }

  .mosaic-cell.is-ready:hover,
  .mosaic-cell.is-ready:focus-visible {
    transform: scale(1.015);
  }

  .download-btn,
  .click-hint {
    opacity: 1;
    transform: none;
  }

  .nav-arrow {
    width: 44px;
    height: 44px;
    font-size: 1.1rem;
  }

  .nav-left {
    left: 10px;
  }

  .nav-right {
    right: 10px;
  }
}

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