@import url("https://fonts.googleapis.com/css2?family=Bebas+Neue&family=DM+Mono:wght@300;400&display=swap");

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

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

@layer tokens {
  :root {
    color-scheme: dark;

    --dark-bg: #000000;
    --dark-fg: #ede8df;
    --dark-muted: #8a7b6e;
    --light-bg: #f0ece3;
    --light-fg: #0d0d14;
    --light-muted: #9a9aaa;
    --accent-dark: #d4a84b;
    --accent-light: #3a6e00;

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

    --font-display: "Bebas Neue", sans-serif;
    --font-mono: "DM Mono", monospace;
    --hairline: 0.0625rem;
    --ui-inset: 2rem;
    --card-bg: transparent;
    --card-border: rgba(212, 168, 75, 0.36);
    --nav-x: calc(var(--ui-inset) + 0.125rem);
    --sidebar-rail: 1.5rem;
    --reveal-offset: 0.625rem;
    --reveal-duration: 0.5s;
    --z-ui: 10;
  }
}

@layer base {
  html {
    color-scheme: dark;
  }

  body {
    background: var(--bg);
    color: var(--fg);
    font-family: var(--font-mono);
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
  }
}

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

  #scroll_container {
    position: relative;
    z-index: 1;
  }

  section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 6rem 5rem;
  }
}

@layer cube {
  #cube {
    --s: min(74vw, 74vh, 560px);
    width: var(--s);
    height: var(--s);
    position: relative;
    transform-style: preserve-3d;
    transform: rotateX(90deg) rotateY(0deg);
    will-change: transform;
  }

  .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
      ),
      #14100d;

    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;
  }

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

@layer ui {
  .menu-state {
    position: fixed;
    opacity: 0;
    pointer-events: none;
  }

  #site_header {
    position: fixed;
    top: var(--ui-inset);
    right: var(--ui-inset);
    z-index: var(--z-ui);
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: auto;
    width: var(--sidebar-rail);
  }

  #left_sidebar,
  #right_sidebar {
    position: fixed;
    top: 50%;
    z-index: var(--z-ui);
    display: flex;
    align-items: center;
    translate: 0 -50%;
    pointer-events: auto;
    width: var(--sidebar-rail);
  }

  #left_sidebar {
    left: var(--ui-inset);
    min-height: min(70vh, 34rem);
    flex-direction: column;
    justify-content: flex-start;
    padding-block-end: 0.125rem;
  }

  #right_sidebar {
    right: var(--ui-inset);
    min-height: min(70vh, 34rem);
    flex-direction: column;
    justify-content: space-between;
  }

  .sidebar-title {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1 1 auto;
    font-family: var(--font-display);
    font-size: clamp(1.35rem, 2vw, 2.2rem);
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: color-mix(in srgb, var(--fg) 82%, transparent);
    writing-mode: vertical-rl;
    text-orientation: mixed;
    transform: rotate(180deg);
    line-height: 0.92;
    margin: 0;
  }

  .menu-toggle {
    width: 3rem;
    height: 3rem;
    border: none;
    border-radius: 50%;
    background: transparent;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: grid;
    place-items: center;
    gap: 0.2rem;
    padding: 0;
    cursor: pointer;
    transform-origin: center;
    transition: transform 0.18s ease;
  }

  .menu-toggle:hover,
  .menu-toggle:focus-visible {
    transform: scale(0.9);
  }

  .menu-toggle span {
    display: block;
    width: 1rem;
    height: 0.0625rem;
    background: var(--fg);
    transition: transform 0.25s ease, opacity 0.25s ease, background 0.25s ease;
  }

  .menu-state:checked ~ #site_header .menu-toggle span:nth-child(1) {
    transform: translateY(0.26rem) rotate(45deg);
  }

  .menu-state:checked ~ #site_header .menu-toggle span:nth-child(2) {
    opacity: 0;
  }

  .menu-state:checked ~ #site_header .menu-toggle span:nth-child(3) {
    transform: translateY(-0.26rem) rotate(-45deg);
  }

  #menu_scrim {
    position: fixed;
    inset: 0;
    z-index: calc(var(--z-ui) + 1);
    background: rgba(8, 8, 10, 0.38);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }

  .menu-state:checked ~ #menu_scrim {
    opacity: 1;
    pointer-events: auto;
  }

  #site_menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: calc(var(--z-ui) + 2);
    width: min(26rem, 88vw);
    padding: 7rem 2rem 2rem;
    background:
      linear-gradient(180deg, color-mix(in srgb, var(--accent) 12%, transparent), transparent 26%),
      color-mix(in srgb, var(--bg) 90%, black 10%);
    border-left: var(--hairline) solid color-mix(in srgb, var(--accent) 24%, transparent);
    box-shadow: -1.5rem 0 3rem rgba(0, 0, 0, 0.2);
    transform: translateX(100%);
    pointer-events: none;
    visibility: hidden;
    transition: transform 0.35s ease;
    display: flex;
    flex-direction: column;
  }

  .menu-state:checked ~ #site_menu {
    transform: translateX(0);
    pointer-events: auto;
    visibility: visible;
  }

  .menu-kicker {
    font-size: 0.62rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--accent);
    margin-block-end: 1.5rem;
  }

  .site-menu-nav {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .site-menu-nav a {
    color: var(--fg);
    text-decoration: none;
    font-family: var(--font-display);
    font-size: clamp(2rem, 6vw, 3.6rem);
    letter-spacing: 0.08em;
    line-height: 0.95;
    text-transform: uppercase;
    transition: color 0.2s ease, translate 0.2s ease;
  }

  .site-menu-nav a:hover,
  .site-menu-nav a:focus-visible {
    color: var(--accent);
  }

  .site-menu-nav a:hover,
  .site-menu-nav a:focus-visible {
    translate: 0.35rem 0;
  }

  .menu-meta {
    margin-top: auto;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
  }

  .menu-meta a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.62rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
  }

  .menu-meta a:hover,
  .menu-meta a:focus-visible {
    color: var(--accent);
  }

  #scene_strip {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    align-items: center;
    width: auto;
    margin: auto 0;
  }

  .sidebar-login {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 0.56rem;
    color: var(--accent);
    padding: 0.7rem 0.85rem;
    border: var(--hairline) solid color-mix(in srgb, var(--accent) 58%, transparent);
    border-radius: 999px;
    background: color-mix(in srgb, var(--bg) 42%, transparent);
    width: auto;
    min-width: 3.5rem;
    white-space: nowrap;
    align-self: center;
    text-align: center;
    transform: translateX(0.3rem);
    transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  }

  .sidebar-login:hover,
  .sidebar-login:focus-visible {
    color: var(--bg);
    background: var(--accent);
    border-color: var(--accent);
  }

  .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;
    }
  }

  #theme_toggle {
    margin-top: auto;
    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;
    align-self: center;
    transition: background 0.3s ease, transform 0.2s ease;

    &:hover {
      background: color-mix(in srgb, var(--muted) 55%, transparent);
      transform: scale(0.96);
    }

    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;
    }
  }

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

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

  #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;
  }

}

@layer cards {
  .text-card {
    max-width: 23.75rem;
    padding: 2.25rem 2rem;
    background: var(--card-bg);
    border-left: var(--hairline) solid var(--card-border);
    overflow: hidden;
    transition: background 0.3s ease, border-color 0.3s ease;
    text-shadow: 0 0.125rem 1.25rem rgba(0, 0, 0, 0.28);

    &.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;
      }
    }
  }

  .tag {
    font-size: 0.8rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--accent);
    margin-block-end: 1.1rem;
  }

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

  h1 {
    font-size: clamp(3rem, 8vw, 6.5rem);
  }
  h2 {
    font-size: clamp(2.2rem, 5vw, 4rem);
  }

  .body-text {
    font-size: 0.78rem;
    line-height: 1.8;
    color: color-mix(in srgb, var(--fg) 72%, transparent);
    margin-block-start: 1.25rem;
  }

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

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

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

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

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

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

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

  .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;
    }
  }

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

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

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

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

  .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;
  }

  .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;
  }

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

@layer theme {
  :root[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, 0.72);
    --card-border: rgba(58, 110, 0, 0.28);

    .text-card {
      backdrop-filter: blur(6px) saturate(120%);
      -webkit-backdrop-filter: blur(6px) saturate(120%);
      text-shadow: none;
      box-shadow: 0 0.75rem 2rem rgba(13, 13, 20, 0.08);
    }

    .body-text {
      color: color-mix(in srgb, var(--fg) 82%, transparent);
    }

    .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);
    }

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

    #face_caption_name {
      opacity: 0.35;
    }
  }
}

@layer responsive {
  @media (width <= 56.25em) {
    #left_sidebar {
      left: 1rem;
      min-height: min(64vh, 24rem);
    }

    #right_sidebar {
      right: 1rem;
      min-height: min(64vh, 24rem);
    }

    .sidebar-title {
      font-size: 1rem;
      letter-spacing: 0.14em;
    }

    #site_header {
      top: 1rem;
      right: 1rem;
      align-items: center;
    }

    #site_menu {
      width: 100vw;
      padding: 6rem 1.5rem 2rem;
    }

    .site-menu-nav a {
      font-size: clamp(1.8rem, 10vw, 3rem);
    }

    #scene_strip {
      display: flex;
    }

    .sidebar-login {
      font-size: 0.52rem;
    }

    #theme_toggle {
      width: 1.9rem;
      height: 1.9rem;
    }

    #face_caption {
      bottom: 1rem;
    }

    section {
      min-height: 150vh;
      align-items: flex-end;
      padding: 0 1.5rem 3.5rem;
    }

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

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

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

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

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