:root {
  --patio: #0f2420;
  --patio-deep: #0a1815;
  --sodium: #e0b44a;
  --talavera: #1e5c8b;
  --zinc: #d8d6cf;
  --zinc-bright: #eceae3;
  --ink: #141311;
  --dust: #6f6a62;
  --bone: #e6e1d6;
  --line: rgba(20, 19, 17, 0.16);
  --line-soft: rgba(20, 19, 17, 0.1);
  --tile-wash: rgba(20, 19, 17, 0.02);
  --index-fade: rgba(20, 19, 17, 0.07);
  --display: "Bricolage Grotesque", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --zinc: #101412;
  --zinc-bright: #171c19;
  --ink: #e6e1d6;
  --dust: #9c958b;
  --talavera: #8ec0e0;
  --line: rgba(230, 225, 214, 0.14);
  --line-soft: rgba(230, 225, 214, 0.1);
  --tile-wash: rgba(230, 225, 214, 0.04);
  --index-fade: rgba(230, 225, 214, 0.08);
}

html[data-theme="light"] {
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--zinc);
  color: var(--ink);
  font-family: var(--display);
  overflow-x: hidden;
}

button,
a,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

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

:focus-visible {
  outline: 2px solid var(--sodium);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: 12px;
  z-index: 40;
  padding: 10px 14px;
  background: var(--sodium);
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: none;
}

.mast {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 84px;
  padding: 0 4.5vw;
  background: var(--patio);
  color: var(--bone);
  border-bottom: 1px solid rgba(230, 225, 214, 0.12);
}

.mark {
  display: flex;
  align-items: center;
  gap: 14px;
}

.mark-seal {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--sodium);
  color: var(--sodium);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

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

.mark-copy strong {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.mark-copy small {
  color: rgba(230, 225, 214, 0.62);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mast-tools {
  display: flex;
  align-items: center;
  gap: 22px;
}

#clock,
.theme-btn,
footer,
.tile-meta,
.tile-label {
  font-family: var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

#clock {
  font-size: 11px;
  color: rgba(230, 225, 214, 0.7);
}

.theme-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 1px solid rgba(230, 225, 214, 0.2);
  background: transparent;
  color: var(--bone);
  padding: 8px 12px;
  font-size: 11px;
}

.theme-btn:hover,
.theme-btn[aria-pressed="true"] {
  border-color: var(--sodium);
  color: var(--sodium);
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 40px 4.5vw 32px;
}

.vault-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 28px;
}

h1 {
  margin: 0;
  font-size: clamp(36px, 5vw, 68px);
  font-weight: 800;
  letter-spacing: -0.07em;
  line-height: 0.95;
}

.vault-note {
  max-width: 28ch;
  margin: 0;
  color: var(--dust);
  font-size: 14px;
  line-height: 1.55;
}

.note-mobile {
  display: none;
}

.mural {
  display: flex;
  flex: 1;
  min-height: min(68vh, 720px);
  border: 1px solid var(--line);
  background: var(--zinc-bright);
}

.tile {
  position: relative;
  flex: 1 1 0;
  display: flex;
  min-width: 0;
  overflow: hidden;
  color: var(--ink);
  border-right: 1px solid var(--line);
  background:
    linear-gradient(180deg, var(--tile-wash), transparent 40%),
    var(--zinc-bright);
  transition: flex 0.55s cubic-bezier(0.22, 1, 0.36, 1), background 0.35s ease;
}

.tile:last-child {
  border-right: 0;
}

.tile::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: var(--accent);
}

.tile-index {
  position: absolute;
  right: -0.08em;
  bottom: -0.18em;
  font-size: clamp(88px, 11vw, 168px);
  font-weight: 800;
  letter-spacing: -0.08em;
  line-height: 0.7;
  color: var(--index-fade);
  pointer-events: none;
}

.tile-spine {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px 16px 24px 22px;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

.tile-label,
.tile-meta {
  font-size: 10px;
  color: var(--dust);
}

.tile-short {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.tile-body {
  display: none;
  flex-direction: column;
  justify-content: flex-end;
  gap: 12px;
  width: min(360px, 100%);
  padding: 28px 28px 28px 8px;
}

.tile-body strong {
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 0.95;
}

.tile-copy {
  max-width: 32ch;
  color: var(--dust);
  font-size: 14px;
  line-height: 1.5;
}

.tile-go {
  width: max-content;
  margin-top: 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--accent);
  font-size: 13px;
  font-weight: 700;
}

.tile.is-open,
.tile:hover,
.tile:focus-visible {
  flex: 2.8 1 0;
  background: color-mix(in srgb, var(--accent) 12%, var(--zinc-bright));
  outline: none;
}

.tile.is-open .tile-spine,
.tile:hover .tile-spine,
.tile:focus-visible .tile-spine {
  display: none;
}

.tile.is-open .tile-body,
.tile:hover .tile-body,
.tile:focus-visible .tile-body {
  display: flex;
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  padding: 0 4.5vw;
  background: var(--patio-deep);
  font-size: 11px;
  color: rgba(230, 225, 214, 0.62);
}

@media (max-width: 860px) {
  .mast {
    padding: 16px 20px;
  }

  main {
    padding: 28px 20px 24px;
  }

  .vault-head,
  footer {
    display: block;
  }

  .vault-note {
    margin-top: 16px;
  }

  .note-desk {
    display: none;
  }

  .note-mobile {
    display: inline;
  }

  .mural {
    display: block;
    min-height: 0;
  }

  .tile {
    display: block;
    min-height: 0;
    padding: 22px 20px 22px 24px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .tile-spine,
  .tile-index {
    display: none;
  }

  .tile-body {
    display: flex;
    width: auto;
    padding: 0;
  }

  .tile:hover,
  .tile:focus-visible {
    flex: none;
  }

  footer {
    padding: 22px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}