body.theme-concrete-art {
  background:
    linear-gradient(90deg, transparent 0 calc(12.5% - 1px), color-mix(in srgb, var(--line), transparent 92%) calc(12.5% - 1px) calc(12.5% + 1px), transparent calc(12.5% + 1px)),
    linear-gradient(0deg, transparent 0 calc(25% - 1px), color-mix(in srgb, var(--line), transparent 93%) calc(25% - 1px) calc(25% + 1px), transparent calc(25% + 1px)),
    var(--bg);
}

.theme-concrete-art .topbar {
  border-bottom: 2px solid var(--line);
  background: var(--bg);
}

.theme-concrete-art .brand {
  font-family: var(--mono);
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.theme-concrete-art .brand::before {
  content: "";
  width: 16px;
  height: 16px;
  background: var(--accent);
}

.theme-concrete-art .hero {
  min-height: min(768px, 88vh);
  border-inline: 2px solid var(--line);
  padding-inline: clamp(24px, 6vw, 72px);
}

.theme-concrete-art .hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  right: 0;
  top: 12.5%;
  width: 25%;
  aspect-ratio: 1;
  background:
    linear-gradient(90deg, var(--accent) 0 50%, transparent 50%),
    linear-gradient(0deg, color-mix(in srgb, #d6ad42, transparent 8%) 0 50%, transparent 50%);
  opacity: .78;
}

.theme-concrete-art .hero::after {
  content: "1:2:4:8";
  position: absolute;
  right: 0;
  bottom: 16px;
  font: 700 11px/1 var(--mono);
  letter-spacing: .16em;
}

.theme-concrete-art h1 {
  max-width: 810px;
  font-weight: 700;
  line-height: .92;
}

.theme-concrete-art .kicker {
  display: inline-grid;
  min-width: 25%;
  padding: 8px;
  color: var(--bg);
  background: var(--accent);
}

.theme-concrete-art .section {
  border-top-width: 2px;
}

.theme-concrete-art .section::after {
  content: "";
  position: absolute;
  top: -8px;
  right: 0;
  width: 14px;
  height: 14px;
  background: var(--accent);
}

.theme-concrete-art .section-head {
  grid-template-columns: 1fr 3fr;
  gap: 24px;
}

.theme-concrete-art .section-index {
  align-self: start;
  padding: 12px;
  border: 2px solid var(--line);
  color: var(--fg);
  background: var(--card);
}

.theme-concrete-art h2 {
  font-size: clamp(36px, 6vw, 72px);
  font-weight: 700;
}

.theme-concrete-art .cards,
.theme-concrete-art .principles { gap: 24px; }

.theme-concrete-art :is(.card, .hero-card, .principle, .timeline-item) {
  background:
    linear-gradient(90deg, var(--accent) 0 8px, transparent 8px),
    var(--card);
}

.theme-concrete-art .cards .card:nth-child(3n + 2) {
  background:
    linear-gradient(90deg, #d6ad42 0 8px, transparent 8px),
    var(--card);
}

.theme-concrete-art .cards .card:nth-child(3n) {
  background:
    linear-gradient(90deg, #356b88 0 8px, transparent 8px),
    var(--card);
}

.theme-concrete-art .tag,
.theme-concrete-art .skill-pill {
  border-width: 2px;
  border-radius: 0;
}

.theme-concrete-art .skill-pill:nth-child(4n + 1) { padding-inline: 24px; }
.theme-concrete-art .skill-pill:nth-child(4n + 2) { padding-inline: 16px; }
.theme-concrete-art .skill-pill:nth-child(4n + 3) { padding-inline: 12px; }

.theme-concrete-art .contact-panel {
  grid-template-columns: 3fr 1fr;
  border: 2px solid var(--line);
  outline: 8px solid color-mix(in srgb, var(--accent), transparent 28%);
  outline-offset: -10px;
}

.theme-concrete-art .reveal {
  border: 2px solid var(--line);
  outline: 0;
  background:
    linear-gradient(90deg, var(--accent) 0 12.5%, transparent 12.5%),
    linear-gradient(0deg, transparent 0 87.5%, color-mix(in srgb, #d6ad42, transparent 8%) 87.5%),
    var(--card-strong);
  padding-left: calc(var(--style-card-padding) + 14%);
}

.theme-concrete-art .regenerating {
  background:
    linear-gradient(90deg, transparent 0 calc(12.5% - 1px), color-mix(in srgb, var(--line), transparent 38%) calc(12.5% - 1px) calc(12.5% + 1px), transparent calc(12.5% + 1px)),
    linear-gradient(0deg, transparent 0 calc(25% - 1px), color-mix(in srgb, var(--line), transparent 42%) calc(25% - 1px) calc(25% + 1px), transparent calc(25% + 1px)),
    var(--bg);
  color: var(--fg);
}

.theme-concrete-art .regenerating::before,
.theme-concrete-art .regenerating::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.theme-concrete-art .regenerating::before {
  top: 8%;
  right: 6%;
  width: clamp(116px, 22vw, 260px);
  aspect-ratio: 1;
  background:
    linear-gradient(90deg, var(--accent) 0 50%, transparent 50%),
    linear-gradient(0deg, #d6ad42 0 50%, transparent 50%);
}

.theme-concrete-art .regenerating::after {
  left: 5%;
  bottom: 7%;
  width: clamp(132px, 28vw, 320px);
  height: clamp(20px, 4vw, 44px);
  background: linear-gradient(90deg, var(--accent) 0 25%, #d6ad42 25% 50%, #356b88 50% 75%, var(--fg) 75%);
}

.theme-concrete-art .regen-box {
  border: 2px solid var(--line);
  background:
    linear-gradient(90deg, var(--accent) 0 12.5%, transparent 12.5%),
    linear-gradient(0deg, transparent 0 87.5%, #d6ad42 87.5%),
    var(--card);
  color: var(--fg);
  box-shadow: 12px 12px 0 color-mix(in srgb, var(--accent), transparent 18%);
  padding-inline-start: calc(clamp(24px, 5vw, 52px) + 12.5%);
}

.theme-concrete-art .regen-box::before,
.theme-concrete-art .regen-box::after {
  content: "";
  position: absolute;
  z-index: 0;
  pointer-events: none;
}

.theme-concrete-art .regen-box::before {
  inset: 0 auto 0 12.5%;
  width: 2px;
  background: var(--line);
}

.theme-concrete-art .regen-box::after {
  top: 0;
  right: 12.5%;
  width: 2px;
  height: 25%;
  background: var(--line);
}

.theme-concrete-art .regen-line {
  padding-inline-start: 36px;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.theme-concrete-art .regen-line::before,
.theme-concrete-art .regen-line.active::before {
  top: .48em;
  width: 18px;
  height: 12px;
  border: 2px solid var(--line);
  border-radius: 0;
  background: var(--card);
}

.theme-concrete-art .regen-line.active::before { background: var(--accent); }
.theme-concrete-art .regen-line:nth-child(2).active::before { background: #d6ad42; }
.theme-concrete-art .regen-line:nth-child(3).active::before { background: #356b88; }
.theme-concrete-art .regen-line:nth-child(4).active::before { background: var(--fg); }

@media (max-width: 720px) {
  .theme-concrete-art .hero { min-height: auto; }
  .theme-concrete-art .hero::before { opacity: .14; }
  .theme-concrete-art .section-head,
  .theme-concrete-art .contact-panel { grid-template-columns: 1fr; }
  .theme-concrete-art .reveal { background: var(--card-strong); padding-left: calc(var(--style-card-padding) + 8px); }
}