/* ==========================================================================
   JUSTPICS // JOURNEY SERIES
   Cinematic, Immersive, Editorial Aesthetic
   ========================================================================== */

:root {
  /* Default Ambient Base (Rainy Night) */
  --color-bg-base: #020305;
  --color-bg-glow: radial-gradient(circle at 50% 30%, rgba(123, 181, 250, 0.08) 0%, transparent 60%);
  --color-text-primary: #ffffff;
  --color-text-secondary: rgba(255, 255, 255, 0.6);
  --color-accent: #7bb5fa;
  --color-overlay: rgba(0, 0, 0, 0.85);

  --font-display: 'Cormorant Garamond', serif;
  --font-body: 'Inter', sans-serif;

  --motion-slow: 1.2s cubic-bezier(0.16, 1, 0.3, 1);
  --motion-standard: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  --motion-fast: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Atmospheric Shifts */
body[data-ambience="summer-night"] {
  --color-bg-base: #0a0602;
  --color-bg-glow: radial-gradient(circle at 50% 30%, rgba(245, 192, 68, 0.12) 0%, transparent 60%);
  --color-accent: #f5c044;
}

body[data-ambience="winter-storm"] {
  --color-bg-base: #030406;
  --color-bg-glow: radial-gradient(circle at 50% 30%, rgba(179, 212, 255, 0.06) 0%, transparent 60%);
  --color-accent: #b3d4ff;
}

/* Base Resets */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  background-color: var(--color-bg-base);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 2s ease-in-out;
  -webkit-font-smoothing: antialiased;
}

/* Accessibility */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0;
}
.skip-link {
  position: absolute; top: -40px; left: 0; background: var(--color-accent);
  color: #000; padding: 8px; z-index: 9999;
  transition: top 0.2s; font-weight: 500;
}
.skip-link:focus { top: 0; }
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Ambient Layers */
.ambient-layer {
  position: fixed; inset: 0; pointer-events: none; z-index: -1;
}
.ambient-base {
  background: var(--color-bg-base);
  transition: background 2s ease;
}
.ambient-glow {
  background: var(--color-bg-glow);
  transition: background 2s ease;
}
#particle-canvas {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  width: 100%; height: 100%;
}
.ambient-vignette {
  background: radial-gradient(circle at center, transparent 40%, rgba(0,0,0,0.8) 100%);
  z-index: 1;
}
.ambient-grain {
  background-image: url('data:image/svg+xml;utf8,%3Csvg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg"%3E%3Cfilter id="noise"%3E%3CfeTurbulence type="fractalNoise" baseFrequency="0.9" numOctaves="3" stitchTiles="stitch"/%3E%3C/filter%3E%3Crect width="100%25" height="100%25" filter="url(%23noise)" opacity="0.04"/%3E%3C/svg%3E');
  z-index: 2;
  mix-blend-mode: overlay;
}

/* HUD Navigation */
.hud-nav {
  position: fixed; top: 0; left: 0; right: 0;
  padding: 2.5rem 4rem; display: flex; justify-content: space-between; align-items: flex-start;
  z-index: 100; pointer-events: none;
}
.hud-nav > * { pointer-events: auto; }

.brand-logo {
  display: flex; flex-direction: column; align-items: flex-start; gap: 0.75rem;
  text-decoration: none; color: #fff;
}
.brand-logo svg { width: 32px; height: 32px; transition: transform var(--motion-slow); }
.brand-logo:hover svg { transform: rotate(90deg); }
.brand-text {
  font-family: var(--font-body); font-size: 0.65rem; font-weight: 500;
  letter-spacing: 0.3em; text-transform: uppercase;
}

.atmosphere-toggles { display: flex; gap: 2rem; }
.atmos-btn {
  background: none; border: none; color: var(--color-text-secondary);
  font-family: var(--font-body); font-size: 0.7rem; font-weight: 500;
  letter-spacing: 0.15em; text-transform: uppercase; cursor: pointer;
  padding: 0.5rem 0; position: relative; transition: color var(--motion-standard);
}
.atmos-btn[aria-checked="true"] { color: #fff; }
.atmos-btn::after {
  content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 0; height: 1px; background: var(--color-accent); transition: width var(--motion-standard);
}
.atmos-btn[aria-checked="true"]::after { width: 100%; }

.hud-right { display: flex; align-items: center; gap: 3rem; }
.audio-controls { display: flex; align-items: center; gap: 1rem; }
.hud-icon-btn {
  background: none; border: none; color: var(--color-text-secondary); cursor: pointer;
  display: flex; align-items: center; justify-content: center; transition: color var(--motion-standard);
}
.hud-icon-btn svg { width: 20px; height: 20px; fill: currentColor; }
.hud-icon-btn[aria-pressed="true"] { color: var(--color-accent); }
.hud-icon-btn[aria-pressed="false"] .icon-unmuted { display: none; }
.hud-icon-btn[aria-pressed="true"] .icon-muted { display: none; }

.volume-slider {
  -webkit-appearance: none; width: 60px; height: 2px;
  background: rgba(255, 255, 255, 0.2); border-radius: 2px; outline: none; cursor: pointer;
  opacity: 0; pointer-events: none; transition: opacity 0.3s;
}
.audio-controls:hover .volume-slider,
.hud-icon-btn[aria-pressed="true"] + .volume-slider { 
  opacity: 1; pointer-events: auto; 
}
.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none; width: 10px; height: 10px; border-radius: 50%;
  background: var(--color-accent); cursor: pointer;
}

.hud-text-btn {
  background: none; border: none; color: #fff;
  font-family: var(--font-body); font-size: 0.7rem; font-weight: 500;
  letter-spacing: 0.15em; text-transform: uppercase; cursor: pointer; position: relative;
}
.hud-text-btn::before {
  content: ''; position: absolute; left: -1.25rem; top: 50%; transform: translateY(-50%);
  width: 4px; height: 4px; border-radius: 50%; background: var(--color-accent);
  opacity: 0; transition: opacity var(--motion-standard);
}
.hud-text-btn:hover::before { opacity: 1; }

@media (max-width: 1024px) {
  .hud-nav { padding: 1.5rem 2rem; flex-wrap: wrap; gap: 1.5rem; }
  .hud-center { order: 3; width: 100%; display: flex; justify-content: center; margin-top: 1rem; }
}

/* Hero Section */
.hero-section {
  height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; position: relative; z-index: 10;
}
.hero-content {
  perspective: 1000px;
}
.hero-kicker {
  font-size: 0.75rem; font-weight: 400; letter-spacing: 0.4em; text-transform: uppercase;
  color: var(--color-accent); margin-bottom: 2.5rem;
}
.hero-title {
  font-family: var(--font-display); font-size: clamp(5rem, 15vw, 11rem);
  font-weight: 300; line-height: 0.85; letter-spacing: -0.02em;
  margin-bottom: 3rem; text-shadow: 0 20px 40px rgba(0,0,0,0.5);
}
.hero-desc {
  font-size: 1rem; font-weight: 300; color: var(--color-text-secondary);
  max-width: 480px; margin: 0 auto; line-height: 1.9;
}
.hero-scroll-invite {
  position: absolute; bottom: 4rem; left: 50%; transform: translateX(-50%);
}
.scroll-line {
  width: 1px; height: 80px; background: rgba(255,255,255,0.15); position: relative; overflow: hidden;
}
.scroll-line::after {
  content: ''; position: absolute; top: -100%; left: 0; width: 100%; height: 100%;
  background: linear-gradient(to bottom, transparent, var(--color-accent));
  animation: scrollDrop 2.5s cubic-bezier(0.7, 0, 0.3, 1) infinite;
}
@keyframes scrollDrop { 0% { top: -100%; } 100% { top: 100%; } }

/* Hero Entrance Animations */
.hero-kicker.reveal-element { opacity: 0; transform: translateY(20px); animation: fadeUp 1.2s 0.2s forwards ease-out; }
.hero-title.reveal-element { opacity: 0; transform: translateY(30px); animation: fadeUp 1.4s 0.4s forwards ease-out; }
.hero-desc.reveal-element { opacity: 0; transform: translateY(20px); animation: fadeUp 1.2s 0.7s forwards ease-out; }
.hero-scroll-invite.reveal-element { opacity: 0; animation: fadeUp 1.2s 1.5s forwards ease-out; }

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* Chapter Navigation */
.chapter-nav {
  position: fixed; left: 4rem; top: 50%; transform: translateY(-50%);
  z-index: 90;
}
.chapter-list { list-style: none; display: flex; flex-direction: column; gap: 1.5rem; }
.chapter-btn {
  background: none; border: none; text-align: left;
  font-family: var(--font-body); font-size: 0.65rem; font-weight: 500;
  letter-spacing: 0.2em; text-transform: uppercase; color: rgba(255,255,255,0.3);
  cursor: pointer; transition: all var(--motion-standard);
  display: flex; align-items: center; gap: 1.25rem;
}
.chapter-btn::before {
  content: ''; width: 0; height: 1px; background: var(--color-accent);
  transition: width var(--motion-standard);
}
.chapter-btn:hover, .chapter-btn.active { color: #fff; }
.chapter-btn.active::before { width: 32px; }

@media (max-width: 1400px) { .chapter-nav { display: none; } }

/* Gallery Canvas */
.gallery-canvas {
  position: relative; z-index: 10; max-width: 1800px; margin: 0 auto;
  padding: 10vh 4rem 20vh 4rem; display: flex; flex-direction: column; gap: 20vh;
}
@media (min-width: 1400px) { .gallery-canvas { padding-left: 20rem; } }
@media (max-width: 768px) { .gallery-canvas { padding: 10vh 2rem 15vh 2rem; gap: 15vh; } }

.plate {
  display: flex; flex-direction: column; position: relative;
  opacity: 0; transform: translateY(40px);
  transition: opacity 1.2s ease-out, transform 1.2s ease-out;
}
.plate.is-visible { opacity: 1; transform: translateY(0); }

/* Layouts */
.layout-full { width: 100%; }
.layout-center { width: 75%; margin: 0 auto; align-items: center; text-align: center; }
.layout-left { width: 60%; margin-right: auto; align-items: flex-start; }
.layout-right { width: 60%; margin-left: auto; align-items: flex-end; text-align: right; }

@media (max-width: 1024px) {
  .layout-center, .layout-left, .layout-right { width: 90%; margin: 0 auto; align-items: center; text-align: center; }
}

.plate-image-wrap {
  width: 100%; overflow: hidden; position: relative;
  box-shadow: 0 40px 80px rgba(0,0,0,0.6); cursor: pointer;
  background: rgba(255,255,255,0.02);
}
.plate-image-wrap::after {
  content: ''; position: absolute; inset: 0;
  background: var(--color-accent); mix-blend-mode: overlay; opacity: 0;
  transition: opacity var(--motion-standard); pointer-events: none;
}
.plate-image-wrap:hover::after { opacity: 0.15; }

.plate-img {
  width: 100%; height: auto; display: block;
  transform-origin: center; will-change: transform;
}

.plate-caption { margin-top: 3rem; max-width: 500px; }
.plate-meta {
  display: block; font-size: 0.65rem; font-weight: 500; letter-spacing: 0.25em;
  text-transform: uppercase; color: var(--color-accent); margin-bottom: 1.5rem;
}
.plate-title {
  font-family: var(--font-display); font-size: 3rem; font-weight: 400; line-height: 1.1; margin-bottom: 1.25rem;
}
.plate-desc { font-size: 0.95rem; font-weight: 300; color: var(--color-text-secondary); line-height: 1.9; }

/* Footer */
.exhibition-footer {
  text-align: center; padding: 6rem 2rem;
  font-size: 0.65rem; letter-spacing: 0.3em; text-transform: uppercase; color: rgba(255,255,255,0.2);
}

/* Lightbox Modal */
.lightbox-modal {
  position: fixed; inset: 0; width: 100vw; height: 100vh;
  max-width: 100vw; max-height: 100vh;
  background: rgba(0,0,0,0.95); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border: none; margin: 0; padding: 0; color: #fff;
  opacity: 0; transition: opacity var(--motion-standard);
}
.lightbox-modal[open] { opacity: 1; }

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

.lightbox-action-btn {
  position: absolute; background: none; border: none; color: #fff; opacity: 0.5;
  cursor: pointer; transition: all var(--motion-fast); z-index: 10;
}
.lightbox-action-btn.close {
  top: 2rem; right: 2rem; width: 48px; height: 48px;
}
.lightbox-action-btn:hover, .lightbox-action-btn:focus-visible { opacity: 1; transform: scale(1.1); }
.lightbox-action-btn svg { width: 28px; height: 28px; }

.lightbox-nav-area {
  position: absolute; top: 0; bottom: 0; width: 15vw;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; z-index: 5;
}
.lightbox-nav-area.left { left: 0; }
.lightbox-nav-area.right { right: 0; }
.nav-arrow {
  width: 64px; height: 64px; border-radius: 50%; background: rgba(255,255,255,0.05);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transform: scale(0.9); transition: all var(--motion-fast);
}
.lightbox-nav-area:hover .nav-arrow, .lightbox-nav-area:focus-visible .nav-arrow {
  opacity: 1; transform: scale(1); background: rgba(255,255,255,0.1);
}
.nav-arrow svg { width: 32px; height: 32px; color: #fff; }

.lightbox-stage {
  position: relative; max-width: 90vw; max-height: 85vh;
  display: flex; align-items: center; justify-content: center;
}
#lightbox-img {
  max-width: 100%; max-height: 85vh; object-fit: contain;
  opacity: 0; transition: opacity var(--motion-standard);
  box-shadow: 0 30px 100px rgba(0,0,0,0.8);
}
#lightbox-img.loaded { opacity: 1; }

.lightbox-loading {
  position: absolute; width: 40px; height: 40px;
  border: 2px solid rgba(255,255,255,0.1); border-top-color: var(--color-accent);
  border-radius: 50%; animation: spin 1s linear infinite;
  opacity: 0; transition: opacity 0.3s;
}
.lightbox-loading.active { opacity: 1; }
@keyframes spin { to { transform: rotate(360deg); } }

.lightbox-meta {
  position: absolute; bottom: 3rem; left: 3rem; max-width: 500px;
  opacity: 0.8; transition: opacity var(--motion-fast);
}
.lightbox-container:hover .lightbox-meta { opacity: 1; }
#lightbox-title { font-family: var(--font-display); font-size: 2.5rem; font-weight: 300; margin-bottom: 0.75rem; }
#lightbox-desc { font-size: 0.95rem; color: rgba(255,255,255,0.7); line-height: 1.7; margin-bottom: 1.25rem; font-weight: 300; }
.lightbox-exif { font-size: 0.65rem; letter-spacing: 0.15em; color: var(--color-accent); text-transform: uppercase; }

@media (max-width: 768px) {
  .lightbox-meta { bottom: 1.5rem; left: 1.5rem; right: 1.5rem; }
  #lightbox-title { font-size: 1.75rem; }
  .lightbox-action-btn.close { top: 1rem; right: 1rem; }
  .nav-arrow { width: 48px; height: 48px; opacity: 1; background: transparent; }
}

/* Prologue Modal */
.prologue-modal {
  border: none; background: transparent; margin: auto; max-width: 100vw; max-height: 100vh;
}
.prologue-modal::backdrop {
  background: var(--color-overlay); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}
.prologue-modal[open] { animation: fadeUp 0.8s var(--motion-slow) forwards; }
.prologue-content {
  position: relative; background: var(--color-bg-base); padding: 4rem;
  border-radius: 4px; border: 1px solid rgba(255,255,255,0.05); color: #fff;
  max-width: 640px; box-shadow: 0 40px 100px rgba(0,0,0,0.8);
}
.prologue-body { text-align: center; }
.prologue-kicker { display: block; font-size: 0.7rem; letter-spacing: 0.3em; color: var(--color-accent); text-transform: uppercase; margin-bottom: 2rem; }
#prologue-title { font-family: var(--font-display); font-size: 3.5rem; font-weight: 300; line-height: 1.1; margin-bottom: 2.5rem; }
.prologue-body p { font-size: 1.05rem; line-height: 2; color: var(--color-text-secondary); margin-bottom: 1.5rem; font-weight: 300; }

.keyboard-shortcuts { margin-top: 3rem; border-top: 1px solid rgba(255,255,255,0.1); padding-top: 2rem; text-align: left; }
.keyboard-shortcuts h3 { font-size: 0.7rem; letter-spacing: 0.2em; text-transform: uppercase; color: rgba(255,255,255,0.4); margin-bottom: 1.5rem; }
.keyboard-shortcuts ul { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.keyboard-shortcuts li { font-size: 0.85rem; color: rgba(255,255,255,0.6); display: flex; align-items: center; gap: 0.75rem; }
kbd { background: rgba(255,255,255,0.1); padding: 0.25rem 0.5rem; border-radius: 4px; font-family: monospace; font-size: 0.8rem; border-bottom: 2px solid rgba(255,255,255,0.1); }

@media (max-width: 768px) {
  .prologue-content { padding: 3rem 1.5rem; width: 90vw; }
  #prologue-title { font-size: 2.5rem; }
  .keyboard-shortcuts ul { grid-template-columns: 1fr; }
}

/* Toast Notification */
.toast-region {
  position: fixed; bottom: 2rem; left: 50%; transform: translateX(-50%) translateY(20px);
  background: #fff; color: #000; padding: 0.75rem 1.5rem; border-radius: 40px;
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase;
  opacity: 0; pointer-events: none; transition: all 0.4s var(--motion-slow); z-index: 2000;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}
.toast-region.show { opacity: 1; transform: translateX(-50%) translateY(0); }

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