/* ============================================
   TUMBUKTU STUDIO — Design System & Styles
   ============================================ */

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

:root {
  --bg: #0a0a0a;
  --bg-surface: #111111;
  --text: #ffffff;
  --text-muted: #bbbbbb;
  --text-dim: #666666;
  --accent: #d2a15f;
  --sidebar-width: 260px;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  overflow-x: hidden;
  cursor: none;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

button {
  background: none;
  border: none;
  color: inherit;
  cursor: none;
  font-family: inherit;
}

::selection {
  background: var(--accent);
  color: var(--bg);
}

/* --- Smooth scroll container (Lenis) --- */
html.lenis, html.lenis body {
  height: auto;
}

.lenis.lenis-smooth {
  scroll-behavior: auto !important;
}

.lenis.lenis-smooth [data-lenis-prevent] {
  overscroll-behavior: contain;
}

/* ============================================
   LOADER
   ============================================ */
.loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}

.loader__video-wrap {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.loader__video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
}

.loader__content {
  position: relative;
  z-index: 2;
  text-align: center;
}

.loader__title {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.loader__title-main {
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  font-weight: 300;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  opacity: 0;
}

.loader__title-sub {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: clamp(1rem, 2.5vw, 1.6rem);
  font-weight: 400;
  font-style: italic;
  letter-spacing: 0.15em;
  color: var(--accent);
  opacity: 0;
}

.loader__tagline {
  margin-top: 2rem;
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text-muted);
  opacity: 0;
}

/* ============================================
   CUSTOM CURSOR
   ============================================ */
.cursor {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 10000;
  pointer-events: none;
  mix-blend-mode: difference;
}

.cursor__dot {
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--text);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.3s var(--ease-out-expo),
              height 0.3s var(--ease-out-expo),
              border-color 0.3s;
}

.cursor--hover .cursor__dot {
  width: 48px;
  height: 48px;
  border-color: var(--accent);
}

.cursor--click .cursor__dot {
  width: 12px;
  height: 12px;
}

/* ============================================
   NAV PREVIEW (background on hover)
   ============================================ */
.nav-preview {
  position: fixed;
  inset: 0;
  z-index: 1;
  background-size: cover;
  background-position: center;
  opacity: 0;
  filter: blur(40px) brightness(0.3);
  transition: opacity 0.6s var(--ease-out-expo),
              background-image 0.6s;
  pointer-events: none;
}

.nav-preview--active {
  opacity: 1;
}

/* ============================================
   SITE WRAPPER
   ============================================ */
.site {
  position: relative;
  z-index: 2;
  display: flex;
  min-height: 100vh;
}

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  z-index: 100;
  display: flex;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
}

.sidebar__inner {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 100%;
  padding: 2.5rem 2rem;
}

.sidebar__header {
  margin-bottom: 3rem;
}

.sidebar__logo {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar__logo-main {
  font-size: 1.1rem;
  font-weight: 300;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

.sidebar__logo-sub {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 0.85rem;
  font-style: italic;
  color: var(--accent);
  letter-spacing: 0.1em;
}

/* Hamburger (hidden on desktop) */
.menu-toggle {
  display: none;
}

/* Nav */
.sidebar__nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.nav-link {
  display: block;
  padding: 0.55rem 0;
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  transition: color 0.3s, letter-spacing 0.3s var(--ease-out-expo);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text);
  letter-spacing: 0.18em;
}

.nav-link.active {
  color: var(--accent);
}

/* Footer */
.sidebar__footer {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.sidebar__social {
  display: flex;
  gap: 1rem;
}

.sidebar__social-link {
  color: var(--text-dim);
  transition: color 0.3s;
}

.sidebar__social-link:hover {
  color: var(--accent);
}

.sidebar__copy {
  font-size: 0.65rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}

/* ============================================
   MAIN CONTENT AREA
   ============================================ */
.main {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  position: relative;
}

/* ============================================
   HORIZONTAL SLIDESHOW (All Work)
   ============================================ */
.slideshow {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.slideshow__track {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 32px;
  will-change: transform;
}

.slideshow__slide {
  flex: 0 0 auto;
  width: min(55vw, 900px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s, transform 0.5s var(--ease-out-expo);
  opacity: 0.4;
  transform: scale(0.92);
}

.slideshow__slide--active {
  opacity: 1;
  transform: scale(1);
}

.slideshow__img-wrap {
  position: relative;
  overflow: hidden;
  border-radius: 2px;
  background: var(--bg-surface);
  line-height: 0;
  width: 100%;
}

.slideshow__img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
  max-height: 75vh;
}

/* Lazy loading fade-in */
.slideshow__img[data-src],
.gallery__img[data-src] {
  opacity: 0;
  transition: opacity 0.5s ease;
}

.slideshow__img.loaded,
.gallery__img.loaded {
  opacity: 1;
}

/* Video overlays */
.slideshow__video-wrap,
.gallery__video-wrap {
  position: relative;
}

.slideshow__play-icon,
.gallery__play-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.7;
  pointer-events: none;
  transition: opacity 0.3s;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,0.5));
}

.slideshow__video-wrap:hover .slideshow__play-icon,
.gallery__video-wrap:hover .gallery__play-icon {
  opacity: 0;
}

.slideshow__video,
.gallery__video {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
  max-height: 75vh;
  background: var(--bg-surface);
}

/* Viewer video */
.viewer__video {
  max-width: 85vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 2px;
  background: #000;
}

.slideshow__caption {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  width: 100%;
  padding: 0.8rem 0 0;
  opacity: 0;
  transition: opacity 0.4s;
}

.slideshow__slide--active .slideshow__caption {
  opacity: 1;
}

.slideshow__caption-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 0.9rem;
  font-style: italic;
  color: var(--text-muted);
}

.slideshow__caption-author {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.slideshow__counter {
  position: absolute;
  bottom: 2rem;
  right: 2.5rem;
  z-index: 5;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

/* ============================================
   MASONRY GALLERY GRID (Category views)
   ============================================ */
.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 4px;
  gap: 0 1.5rem;
  padding: 2.5rem 2.5rem 4rem;
}

.gallery__item {
  position: relative;
  opacity: 0;
  transform: translateY(40px);
}

.gallery__item.revealed {
  opacity: 1;
  transform: translateY(0);
}

.gallery__img-wrap {
  position: relative;
  overflow: hidden;
  border-radius: 2px;
  background: var(--bg-surface);
  line-height: 0;
}

.gallery__img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
  transition: transform 0.6s var(--ease-out-expo);
  will-change: transform;
}

.gallery__item:hover .gallery__img {
  transform: scale(1.05);
}

/* Caption */
.gallery__caption {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.6rem 0 0;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.4s, transform 0.4s var(--ease-out-expo);
}

.gallery__item:hover .gallery__caption {
  opacity: 1;
  transform: translateY(0);
}

.gallery__caption-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 0.85rem;
  font-style: italic;
  color: var(--text-muted);
}

.gallery__caption-author {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
}

/* Reveal mask animation (for initial load) */
.gallery__item .gallery__img-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--bg);
  transform-origin: top;
  transform: scaleY(0);
  pointer-events: none;
}

.gallery__item.mask-reveal .gallery__img-wrap::after {
  animation: maskReveal 0.8s var(--ease-out-expo) forwards;
}

@keyframes maskReveal {
  0% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: top; }
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about {
  padding: 4rem 2.5rem;
  max-width: 600px;
}

.about__title {
  font-size: 1.6rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 2rem;
}

.about__text {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-weight: 300;
}

.about__contact {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.about__contact p {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
}

.about__contact a {
  color: var(--accent);
  font-size: 0.9rem;
  transition: opacity 0.3s;
}

.about__contact a:hover {
  opacity: 0.7;
}

/* ============================================
   FULLSCREEN VIEWER
   ============================================ */
.viewer {
  position: fixed;
  inset: 0;
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
}

.viewer--open {
  pointer-events: auto;
  opacity: 1;
}

.viewer__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  opacity: 0;
  transition: opacity 0.5s;
}

.viewer--open .viewer__backdrop {
  opacity: 1;
}

.viewer__img-wrap {
  position: relative;
  z-index: 2;
  max-width: 85vw;
  max-height: 85vh;
}

.viewer__img {
  max-width: 85vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 2px;
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.5s 0.1s, transform 0.6s 0.1s var(--ease-out-expo);
}

.viewer--open .viewer__img {
  opacity: 1;
  transform: scale(1);
}

.viewer__caption {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  opacity: 0;
  transition: opacity 0.4s 0.3s;
}

.viewer--open .viewer__caption {
  opacity: 1;
}

.viewer__caption-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1rem;
  font-style: italic;
  color: var(--text-muted);
}

.viewer__caption-author {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.viewer__close {
  position: absolute;
  top: 2rem;
  right: 2rem;
  z-index: 4;
  font-size: 2rem;
  color: var(--text-muted);
  transition: color 0.3s;
  line-height: 1;
}

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

.viewer__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 4;
  padding: 1rem;
  color: var(--text-muted);
  transition: color 0.3s;
}

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

.viewer__arrow--prev {
  left: 1.5rem;
}

.viewer__arrow--next {
  right: 1.5rem;
}

.viewer__counter {
  position: absolute;
  bottom: 2rem;
  right: 2rem;
  z-index: 4;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

/* ============================================
   MOBILE OVERLAY
   ============================================ */
.mobile-overlay {
  position: fixed;
  inset: 0;
  z-index: 98;
  background: rgba(0, 0, 0, 0.8);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s;
}

.mobile-overlay--visible {
  opacity: 1;
  pointer-events: auto;
}

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

/* Large desktop — 5 columns */
@media (min-width: 1600px) {
  .gallery {
    grid-template-columns: repeat(5, 1fr);
  }
}

/* Small desktop / large tablet — 3 columns */
@media (max-width: 1200px) {
  .gallery {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Tablet — 2 columns */
@media (max-width: 1024px) {
  .gallery {
    grid-template-columns: repeat(2, 1fr);
    padding: 2rem 1.5rem 3rem;
  }

  .slideshow__slide {
    width: 70vw;
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --sidebar-width: 100%;
  }

  body {
    cursor: auto;
  }

  /* Lock scroll when mobile menu is open */
  body.menu-open {
    overflow: hidden;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
  }

  button {
    cursor: pointer;
  }

  a {
    -webkit-tap-highlight-color: transparent;
  }

  .cursor {
    display: none;
  }

  /* Disable hover-only interactions on mobile */
  .gallery__item:hover .gallery__img {
    transform: none;
  }

  .gallery__item:hover .gallery__caption {
    opacity: 1;
    transform: none;
  }

  .nav-link:hover {
    letter-spacing: 0.12em;
  }

  /* Remove stacking context from .site so sidebar z-index works in root context */
  .site {
    z-index: auto;
  }

  /* Sidebar — slide-in panel */
  .sidebar {
    width: 280px;
    transform: translateX(-100%);
    transition: transform 0.5s var(--ease-out-expo);
    background: var(--bg);
    z-index: 200;
    border-right: 1px solid rgba(255, 255, 255, 0.08);
  }

  .sidebar--open {
    transform: translateX(0);
  }

  .sidebar__inner {
    padding: 3.5rem 2rem 2rem;
  }

  .sidebar__nav ul {
    gap: 0.3rem;
  }

  .nav-link {
    padding: 0.75rem 0;
    font-size: 0.9rem;
  }

  .nav-link.active {
    letter-spacing: 0.18em;
  }

  /* Hamburger — always visible on mobile (outside sidebar) */
  .menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    position: fixed;
    top: 1.2rem;
    left: 1.2rem;
    z-index: 300;
    width: 36px;
    height: 36px;
    cursor: pointer;
    padding: 4px;
    -webkit-tap-highlight-color: transparent;
  }

  .menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text);
    transition: transform 0.3s, opacity 0.3s;
    border-radius: 1px;
  }

  .menu-toggle--active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .menu-toggle--active span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle--active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .main {
    margin-left: 0;
  }

  /* Slideshow mobile — no scrollbar, no native scrolling, fully JS-controlled */
  .slideshow {
    overflow: hidden;
    touch-action: none;
  }

  .slideshow__track {
    gap: 12px;
  }

  .slideshow__slide {
    width: 90vw;
    opacity: 0.35;
    transform: none;
  }

  .slideshow__slide--active {
    opacity: 1;
    transform: none;
  }

  .slideshow__img {
    max-height: 65vh;
  }

  .slideshow__counter {
    right: 1rem;
    bottom: 1rem;
  }

  .slideshow__caption {
    padding: 0.5rem 0.25rem 0;
  }

  .slideshow__caption-title {
    font-size: 0.8rem;
  }

  .slideshow__caption-author {
    font-size: 0.65rem;
  }

  /* Gallery mobile — single column, vertical scroll */
  .gallery {
    grid-template-columns: 1fr;
    grid-auto-rows: auto;
    gap: 1.5rem 0;
    padding: 4rem 0.75rem 3rem;
  }

  .gallery__item {
    grid-row-end: auto !important;
  }

  .gallery__caption {
    opacity: 1;
    transform: none;
  }

  /* Video mobile */
  .slideshow__video,
  .gallery__video {
    max-height: 65vh;
  }

  .slideshow__play-icon svg,
  .gallery__play-icon svg {
    width: 36px;
    height: 36px;
  }

  /* About mobile */
  .about {
    padding: 4rem 1rem 3rem;
  }

  /* Viewer mobile adjustments */
  .viewer__img-wrap {
    max-width: 100vw;
    max-height: 100vh;
  }

  .viewer__img {
    max-width: 96vw;
    max-height: 80vh;
  }

  .viewer__video {
    max-width: 96vw;
    max-height: 80vh;
  }

  .viewer__arrow {
    padding: 0.75rem;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 50%;
  }

  .viewer__arrow--prev {
    left: 0.5rem;
  }

  .viewer__arrow--next {
    right: 0.5rem;
  }

  .viewer__close {
    top: 0.75rem;
    right: 0.75rem;
    font-size: 2.4rem;
    padding: 0.25rem 0.5rem;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 50%;
  }

  .viewer__counter {
    bottom: 1rem;
    right: 1rem;
  }

  .viewer__caption {
    bottom: 1rem;
    left: 1rem;
    transform: none;
    text-align: left;
  }

  /* Mobile overlay — full screen, above content, below sidebar */
  .mobile-overlay {
    z-index: 199;
  }
}

@media (max-width: 480px) {
  .loader__title-main {
    letter-spacing: 0.2em;
  }

  .slideshow__slide {
    width: 94vw;
  }

  .gallery {
    padding: 4rem 0.5rem 2.5rem;
  }
}