/* cube-gallery — scoped from slider/index.html */
.cube-gallery {
  position: relative;
  isolation: isolate;
  direction: rtl;
  font-family: 'Vazirmatn', sans-serif;
}
.cg-sticky-layer {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100vh;
  z-index: 30;
  pointer-events: none;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
}
.cube-gallery.cg-active .cg-sticky-layer {
  opacity: 1;
  visibility: visible;
}
.cg-sticky-layer > * { pointer-events: auto; }
.cube-gallery #cg-scene {
  position: absolute;
  inset: 0;
}
.cube-gallery #cg-scroll_container {
  position: relative;
  z-index: 2;
  isolation: isolate;
}
.cube-gallery .text-card { text-align: right; }
.cube-gallery .text-card.right { text-align: left; }
.cube-gallery #cg-credit { display: none; }
.cube-gallery #cg-theme_toggle { display: none; }
.cube-gallery #cg-hud,
.cube-gallery #cg-face_caption { display: none; }
.cube-gallery .cta { display: none; }

.cube-gallery .cg-particles-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: #ffffff;
  pointer-events: none;
  overflow: hidden;
}
.cube-gallery .cg-particles-bg canvas {
  display: block;
}
.cube-gallery #cg-scene {
  z-index: 1;
}
.cube-gallery #cg-hud,
.cube-gallery #cg-scene_strip,
.cube-gallery #cg-face_caption {
  z-index: 2;
}
.cube-gallery .text-card {
  position: relative;
  z-index: 1;
}

@layer reset, tokens, base, layout, cube, ui, cards, reveal, theme, responsive;

@layer reset {
  .cube-gallery *,
  .cube-gallery *::before,
  .cube-gallery *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
}

@layer tokens {
  .cube-gallery {
    color-scheme: light;

    --dark-bg: #1a0b2e;
    --dark-fg: #ede8df;
    --dark-muted: #8a7b6e;
    --light-bg: #f7f5fc;
    --light-fg: #2a1b45;
    --light-muted: #6b5b85;
    --accent-dark: #7b4db0;
    --accent-light: #5a368c;

    --bg: var(--light-bg);
    --fg: var(--light-fg);
    --muted: var(--light-muted);
    --accent: var(--accent-light);

    --font-display: "Vazirmatn", sans-serif;
    --font-mono: "Vazirmatn", sans-serif;
    --hairline: 0.0625rem;
    --ui-inset: 2rem;
    --card-bg: rgba(255, 255, 255, 0.9);
    --card-border: rgba(90, 54, 140, 0.22);
    --nav-x: calc(var(--ui-inset) + 0.125rem);
    --reveal-offset: 0.625rem;
    --reveal-duration: 0.5s;
    --z-ui: 10;
  }
}

@layer base {
  .cube-gallery {
    color-scheme: light;
  }

  .cube-gallery {
    background: #ffffff;
    color: var(--fg);
    font-family: var(--font-mono);
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
  }
}

@layer layout {
  .cube-gallery #cg-scene {
    position: absolute;
    inset: 0;
    z-index: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 1100px;
    pointer-events: none;
  }

  .cube-gallery #cg-scroll_container {
    position: relative;
    z-index: 2;
    isolation: isolate;
  }

  .cube-gallery #cg-scroll_container section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 6rem calc(5rem + var(--ui-inset)) 6rem 5rem;
  }
}

@layer cube {
  .cube-gallery #cg-cube {
    --s: min(52vw, 48vh, 400px);
    width: var(--s);
    height: var(--s);
    position: relative;
    transform-style: preserve-3d;
    transform: rotateX(90deg) rotateY(0deg);
    will-change: transform;
  }

  .cube-gallery .face {
    position: absolute;
    inset: 0;
    overflow: hidden;
    backface-visibility: hidden;
    background: repeating-linear-gradient(
        0deg,
        rgba(255, 255, 255, 0.02) 0,
        rgba(255, 255, 255, 0.02) 1px,
        transparent 1px,
        transparent 48px
      ),
      repeating-linear-gradient(
        90deg,
        rgba(255, 255, 255, 0.02) 0,
        rgba(255, 255, 255, 0.02) 1px,
        transparent 1px,
        transparent 48px
      ),
      #efeaf8;

    img {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    &:has(img) .face-ph {
      display: none;
    }
  }

  .face-ph {
    position: absolute;
    bottom: 1.5rem;
    left: 1.75rem;
    font-family: var(--font-display);
    font-size: clamp(2rem, 8vw, 5rem);
    letter-spacing: 0.04em;
    color: rgba(255, 255, 255, 0.06);
    pointer-events: none;
    user-select: none;
  }

  .cube-gallery .face[data-face="front"] {
    transform: translateZ(calc(var(--s) / 2));
  }
  .cube-gallery .face[data-face="back"] {
    transform: rotateY(180deg) translateZ(calc(var(--s) / 2));
  }
  .cube-gallery .face[data-face="right"] {
    transform: rotateY(90deg) translateZ(calc(var(--s) / 2));
  }
  .cube-gallery .face[data-face="left"] {
    transform: rotateY(-90deg) translateZ(calc(var(--s) / 2));
  }
  .cube-gallery .face[data-face="top"] {
    transform: rotateX(-90deg) translateZ(calc(var(--s) / 2));
  }
  .cube-gallery .face[data-face="bottom"] {
    transform: rotateX(90deg) translateZ(calc(var(--s) / 2));
  }
}

@layer ui {
  .cube-gallery #cg-hud {
    position: absolute;
    top: var(--ui-inset);
    right: var(--ui-inset);
    z-index: var(--z-ui);
    text-align: right;
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    color: var(--muted);
    text-transform: uppercase;

    .progress-bar {
      width: 7.5rem;
      height: var(--hairline);
      background: var(--muted);
      margin-block-start: 0.5rem;
      margin-inline-start: auto;
      position: relative;
      overflow: hidden;
    }

    .progress-fill {
      position: absolute;
      inset-block: 0;
      inset-inline-start: 0;
      width: 0%;
      background: var(--accent);
      transition: width 0.1s linear;
    }

    .scene-label {
      font-size: 0.6rem;
      color: var(--accent);
      margin-block-start: 0.4rem;
    }
  }

  .cube-gallery #cg-scene_strip {
    position: absolute;
    left: var(--nav-x);
    top: 50%;
    translate: -50% -50%;
    z-index: var(--z-ui);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }

  .cube-gallery .scene-dot {
    position: relative;
    display: block;
    width: 0.25rem;
    height: 0.25rem;
    border-radius: 50%;
    background: var(--muted);
    transition: background 0.3s, scale 0.3s;
    cursor: pointer;

    &::before {
      content: "";
      position: absolute;
      inset: -0.2rem;
    }

    &.active {
      background: var(--accent);
      scale: 1.8;
    }
  }

  .cube-gallery #cg-theme_toggle {
    position: absolute;
    bottom: var(--ui-inset);
    left: var(--nav-x);
    translate: -50% 0;
    z-index: var(--z-ui);
    width: 2rem;
    height: 2rem;
    border: none;
    background: color-mix(in srgb, var(--muted) 35%, transparent);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s;

    &:hover {
      background: color-mix(in srgb, var(--muted) 55%, transparent);
    }

    svg {
      width: 0.875rem;
      height: 0.875rem;
      position: absolute;
      transition: opacity 0.3s ease, rotate 0.3s ease;
      color: var(--accent);
    }

    .icon-sun {
      opacity: 1;
      rotate: 0deg;
    }

    .icon-moon {
      opacity: 0;
      rotate: 90deg;
    }
  }

  .cube-gallery #cg-face_caption {
    position: absolute;
    bottom: var(--ui-inset);
    left: 50%;
    translate: -50% 0;
    z-index: var(--z-ui);
    text-align: center;
    pointer-events: none;
    user-select: none;
  }

  .cube-gallery #cg-face_caption_num {
    font-size: 0.58rem;
    letter-spacing: 0.28em;
    color: var(--accent);
    text-transform: uppercase;
    margin-block-end: 0.15rem;
  }

  .cube-gallery #cg-face_caption_name {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 5vw, 3.5rem);
    letter-spacing: 0.08em;
    color: var(--muted);
    opacity: 0.5;
    line-height: 1;
  }

  .cube-gallery #cg-credit {
    position: absolute;
    right: var(--ui-inset);
    top: 50%;
    transform: translateY(-50%) rotate(-90deg);
    transform-origin: right center;
    z-index: var(--z-ui);
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;

    a {
      color: var(--muted);
      text-decoration: none;
    }
  }
}

@layer cards {
  .cube-gallery .text-card {
    max-width: 32rem;
    padding: 2.25rem 2rem;
    background: var(--card-bg);
    border-left: var(--hairline) solid var(--card-border);
    backdrop-filter: blur(6px) saturate(120%);
    -webkit-backdrop-filter: blur(6px) saturate(120%);
    overflow: hidden;
    transition: background 0.3s ease, border-color 0.3s ease;

    &.right {
      margin-inline-start: auto;
      border-left: none;
      border-right: var(--hairline) solid var(--card-border);
      text-align: right;

      .h-line {
        transform-origin: right;
        margin-inline-start: auto;
      }
    }

    &.center {
      margin-inline: auto;
      border-left: none;
      border-top: var(--hairline) solid var(--card-border);
      text-align: center;
      max-width: 28.75rem;

      .h-line {
        transform-origin: center;
        margin-inline: auto;
      }
    }
  }

  .cube-gallery .tag {
    font-size: 0.6rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--accent);
    margin-block-end: 1.1rem;
  }

  .cube-gallery :where(h1, h2) {
    font-family: var(--font-display);
    font-weight: 400;
    letter-spacing: 0.03em;
    line-height: 0.92;
  }

  .cube-gallery h1 {
    font-size: clamp(3.4rem, 9vw, 7.5rem);
  }
  .cube-gallery h2 {
    font-size: clamp(2.6rem, 6vw, 4.8rem);
  }

  .cube-gallery .body-text {
    font-size: clamp(0.95rem, 1.6vw, 1.15rem);
    line-height: 1.8;
    color: color-mix(in srgb, var(--fg) 55%, transparent);
    margin-block-start: 1.25rem;
  }

  .cube-gallery .stat-row {
    display: flex;
    gap: 2.5rem;
    margin-block-start: 2rem;
    flex-wrap: wrap;
  }

  .cube-gallery .stat {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
  }

  .cube-gallery .stat-num {
    font-family: var(--font-display);
    font-size: 2.2rem;
    color: var(--accent);
    line-height: 1;
  }

  .cube-gallery .stat-label {
    font-size: 0.58rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--muted);
  }

  .cube-gallery .h-line {
    width: 3.125rem;
    height: var(--hairline);
    background: var(--accent);
    margin-block-end: 1.2rem;
    transform-origin: left;
  }

  .cube-gallery .cta-row {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 0.75rem;
    margin-block-start: 1.75rem;
  }

  .cube-gallery .text-card.right .cta-row {
    justify-content: flex-end;
  }

  .cube-gallery .cta {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.6rem 1.25rem;
    border: var(--hairline) solid var(--accent);
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;

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

    svg {
      width: 0.6875rem;
      height: 0.6875rem;
    }
  }

  .cube-gallery .cta-back {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.6rem 1.25rem;
    border: var(--hairline) solid
      color-mix(in srgb, var(--muted) 45%, transparent);
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    text-decoration: none;
    transition: background 0.2s, color 0.2s, border-color 0.2s;

    &:hover {
      background: color-mix(in srgb, var(--muted) 12%, transparent);
      border-color: var(--muted);
      color: var(--fg);
    }

    svg {
      width: 0.6875rem;
      height: 0.6875rem;
    }
  }
}

@layer reveal {
  .cube-gallery :is(.tag, h1, h2, .body-text, .stat-row, .cta, .cta-back) {
    opacity: 0;
    translate: 0 var(--reveal-offset);
  }

  .cube-gallery :is(h1, h2) {
    translate: 0 1.125rem;
    transition: opacity var(--reveal-duration) ease 0.08s,
      translate var(--reveal-duration) ease 0.08s;
  }

  .cube-gallery .tag {
    transition: opacity var(--reveal-duration) ease,
      translate var(--reveal-duration) ease;
  }

  .cube-gallery .body-text {
    transition: opacity var(--reveal-duration) ease 0.2s,
      translate var(--reveal-duration) ease 0.2s;
  }

  .cube-gallery .stat-row {
    transition: opacity var(--reveal-duration) ease 0.3s,
      translate var(--reveal-duration) ease 0.3s;
  }

  :is(.cta, .cta-back) {
    transition: opacity var(--reveal-duration) ease 0.35s,
      translate var(--reveal-duration) ease 0.35s, background 0.2s, color 0.2s,
      border-color 0.2s;
  }

  .cube-gallery .h-line {
    opacity: 0;
    scale: 0 1;
    transition: opacity 0.4s ease, scale 0.4s ease;
  }

  :is(.tag, h1, h2, .body-text, .stat-row, .cta, .cta-back).visible {
    opacity: 1;
    translate: 0 0;
  }

  .cube-gallery .h-line.visible {
    opacity: 1;
    scale: 1 1;
  }
}

@layer theme {
  .cube-gallery[data-theme="light"] {
    color-scheme: light;
    --bg: var(--light-bg);
    --fg: var(--light-fg);
    --muted: var(--light-muted);
    --accent: var(--accent-light);
    --card-bg: rgba(240, 236, 227, 0.08);
    --card-border: rgba(58, 110, 0, 0.14);

    .face {
      background: repeating-linear-gradient(
          0deg,
          rgba(0, 0, 0, 0.05) 0,
          rgba(0, 0, 0, 0.05) 1px,
          transparent 1px,
          transparent 48px
        ),
        repeating-linear-gradient(
          90deg,
          rgba(0, 0, 0, 0.05) 0,
          rgba(0, 0, 0, 0.05) 1px,
          transparent 1px,
          transparent 48px
        ),
        #ddd8cf;
    }

    .face-ph {
      color: rgba(0, 0, 0, 0.07);
    }

    .cube-gallery #cg-theme_toggle {
      svg {
        color: var(--fg);
      }
      .icon-sun {
        opacity: 0;
        rotate: -90deg;
      }
      .icon-moon {
        opacity: 1;
        rotate: 0deg;
      }
    }

    .cube-gallery #cg-face_caption_name {
      opacity: 0.35;
    }
  }
}

@layer responsive {
  @media (width <= 56.25em) {
    .cube-gallery #cg-hud {
      top: 1rem;
      right: 1rem;
    }

    .cube-gallery #cg-scene_strip {
      display: none;
    }

    .cube-gallery #cg-theme_toggle {
      bottom: 1rem;
      left: 1.25rem;
      translate: 0 0;
    }

    .cube-gallery #cg-face_caption {
      bottom: 1rem;
    }

    .cube-gallery #cg-scroll_container section {
      min-height: 150vh;
      align-items: flex-end;
      padding: 0 1.5rem 3.5rem;
    }

    .cube-gallery #cg-s0 {
      min-height: 100vh;
      align-items: center;
      padding: 4rem 1.5rem;
    }

    .cube-gallery :is(.text-card, .text-card.right, .text-card.center) {
      max-width: 100%;
      padding: 1.5rem 1.25rem;
    }

    .cube-gallery .body-text {
      line-height: 1.55;
    }

    .cube-gallery .stat-row {
      gap: 1.5rem;
      margin-block-start: 1.25rem;
    }

    .cube-gallery .cta-row {
      margin-block-start: 1.25rem;
    }
  }
}