/* ============================================================
   COMPONENTS — buttons, capability plates, the exploded stack,
   case cards, process steps, commitments, contact
   ============================================================ */

/* ---------- buttons ---------- */

.btn {
  --btn-fg: var(--bg-1);
  --btn-bg: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.4rem;
  font-family: var(--f-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--btn-fg);
  background: var(--btn-bg);
  border: 1px solid var(--btn-bg);
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform 200ms cubic-bezier(.2,.8,.2,1), box-shadow 200ms ease,
              background-color 200ms ease, color 200ms ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 30px -12px var(--accent); }
.btn:active { transform: translateY(0); }
.btn svg { width: 13px; height: 13px; }

.btn-ghost {
  --btn-fg: var(--ink);
  --btn-bg: transparent;
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); box-shadow: none; }

/* ============================================================
   CAPABILITY PLATES — cast plates that tilt toward the pointer
   ============================================================ */

.plates {
  display: grid;
  gap: clamp(1rem, 2vw, 1.5rem);
  grid-template-columns: 1fr;
  perspective: 1200px;
}
@media (min-width: 780px) { .plates { grid-template-columns: repeat(3, 1fr); } }

.plate {
  position: relative;
  padding: clamp(1.5rem, 2.4vw, 2.1rem);
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: var(--radius);
  transition: transform 320ms cubic-bezier(.2,.8,.2,1), box-shadow 320ms ease,
              border-color 320ms ease;
  will-change: transform;
  overflow: hidden;
}
/* a milled top edge — light catching cast metal */
.plate::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--accent), transparent);
  opacity: 0.5;
}
.plate:hover {
  border-color: var(--slab-edge);
  box-shadow: 0 26px 50px -30px rgba(0,0,0,0.55);
}

.plate-mark {
  font-family: var(--f-mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  color: var(--metal);
  margin: 0 0 1.6rem;
}
.plate h3 {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: var(--t-h3);
  letter-spacing: 0.005em;
  line-height: 1.14;
  text-transform: uppercase;
  margin: 0 0 0.75rem;
  text-wrap: balance;
}
.plate p { margin: 0 0 1.35rem; color: var(--ink-2); font-size: 0.965rem; }
.plate ul {
  list-style: none;
  margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: 0.4rem;
}
.plate li {
  font-family: var(--f-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  border: 1px solid var(--line-2);
  border-radius: 999px;
  padding: 0.26rem 0.6rem;
}

/* ============================================================
   THE STACK — exploded isometric slabs.
   Labels are counter-rotated out of the isometric plane so no
   text is ever rendered skewed; the legend beside it carries the
   real content and drives the assembly.
   ============================================================ */

.stack-wrap {
  display: grid;
  gap: clamp(2.5rem, 5vw, 4rem);
  align-items: start;
  grid-template-columns: 1fr;
}
@media (min-width: 900px) { .stack-wrap { grid-template-columns: 1.05fr 1fr; } }

.scene {
  position: relative;
  display: none;
  align-self: stretch;
}
@media (min-width: 620px) { .scene { display: block; } }

/* the assembly stays beside whichever layer is being read */
.scene-holder {
  position: sticky;
  top: 16vh;
  height: 480px;
  perspective: 1500px;
  perspective-origin: 50% 46%;
}

.scene-stage {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  transform: rotateX(58deg) rotateZ(-38deg);
}

.slab {
  position: absolute;
  left: 50%; top: 50%;
  width: 240px; height: 240px;
  margin: -120px 0 0 -120px;
  border: 1px solid var(--slab-edge);
  border-radius: 2px;
  background: linear-gradient(135deg, var(--slab-a), var(--slab-b));
  transform-style: preserve-3d;
  /* a box-shadow in the plane's own space reads as extrusion */
  box-shadow: 7px 7px 0 -1px color-mix(in srgb, var(--slab-edge) 40%, transparent);
  transform: translateZ(var(--z));
  transition: transform 420ms cubic-bezier(.2,.85,.25,1),
              box-shadow 420ms ease, border-color 300ms ease,
              background 300ms ease, opacity 300ms ease;
  will-change: transform;
}
.slab::after {
  content: attr(data-tag);
  position: absolute;
  right: 10px; bottom: 8px;
  font-family: var(--f-mono);
  font-size: 0.56rem;
  letter-spacing: 0.16em;
  color: var(--ink-3);
  transform: rotateZ(38deg) rotateX(-58deg);
  transform-origin: right bottom;
  transition: opacity 260ms ease;
}
.slab.is-active {
  transform: translateZ(calc(var(--z) + 46px)) scale(1.035);
  border-color: var(--accent);
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--accent) 26%, var(--slab-a)), var(--slab-b));
  box-shadow: 7px 7px 0 -1px color-mix(in srgb, var(--accent) 45%, transparent),
              0 40px 60px -30px rgba(0,0,0,0.6);
}
/* when a layer is lifted the others step back, which also stops the
   lifted tag colliding with its neighbour's */
.scene-stage:has(.slab.is-active) .slab:not(.is-active) { opacity: 0.4; }
.scene-stage:has(.slab.is-active) .slab:not(.is-active)::after { opacity: 0; }

/* the shank: a rod threading every layer, so the stack reads as one body */
.scene-shank {
  position: absolute;
  left: 50%; top: 50%;
  width: 10px; height: 10px;
  margin: -5px 0 0 -5px;
  border-radius: 50%;
  background: var(--metal);
  box-shadow: 0 0 0 1px var(--slab-edge);
  transform: translateZ(-140px);
}

.layers { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; }
.layers li { border-top: 1px solid var(--line-2); }
.layers li:last-child { border-bottom: 1px solid var(--line-2); }

.layer {
  width: 100%;
  display: grid;
  grid-template-columns: 2.6rem 1fr;
  gap: 0 1rem;
  align-items: baseline;
  text-align: left;
  background: none;
  border: 0;
  padding: 1.15rem 0.4rem;
  cursor: pointer;
  transition: background-color 220ms ease, padding-left 220ms ease;
}
.layer:hover, .layer.is-active { background: var(--panel); padding-left: 0.9rem; }
.layer-idx {
  font-family: var(--f-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: var(--metal);
  font-variant-numeric: tabular-nums;
}
.layer-name {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: 1.12rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.layer:hover .layer-name, .layer.is-active .layer-name { color: var(--accent); }
.layer-desc {
  grid-column: 2;
  margin: 0.3rem 0 0;
  font-size: 0.925rem;
  color: var(--ink-2);
  line-height: 1.55;
}
.layer-desc code {
  font-family: var(--f-mono);
  font-size: 0.86em;
  color: var(--ink-3);
}

/* ============================================================
   WORK
   ============================================================ */

.work-grid {
  display: grid;
  gap: 1px;
  grid-template-columns: 1fr;
  background: var(--line-2);
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  overflow: hidden;
}
@media (min-width: 760px) { .work-grid { grid-template-columns: 1fr 1fr; } }

.case {
  position: relative;
  padding: clamp(1.6rem, 2.6vw, 2.4rem);
  background: var(--panel);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: background-color 300ms ease;
}
.case:hover { background: var(--panel-2); }
.case p { margin: 0; color: var(--ink-2); font-size: 0.965rem; }

.case-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}
.case-name {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(1.45rem, 2.4vw, 2rem);
  letter-spacing: 0.01em;
  text-transform: uppercase;
  line-height: 1;
  margin: 0;
}
.case-sector {
  font-family: var(--f-mono);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--metal);
  white-space: nowrap;
  margin: 0;
}
.case-foot {
  margin-top: auto;
  padding-top: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.4rem;
  border-top: 1px solid var(--line-2);
}
.case-stat { display: flex; flex-direction: column; gap: 0.15rem; }
.case-stat b {
  font-family: var(--f-mono);
  font-size: 1.02rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  letter-spacing: -0.01em;
}
.case-stat span {
  font-family: var(--f-mono);
  font-size: 0.56rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* ============================================================
   PROCESS — a real sequence, which is why it is numbered
   ============================================================ */

.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; }

.step {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem 2.5rem;
  padding: clamp(1.6rem, 3vw, 2.4rem) 0;
  border-top: 1px solid var(--line-2);
  align-items: start;
}
.step:last-child { border-bottom: 1px solid var(--line-2); }
@media (min-width: 820px) {
  .step { grid-template-columns: 5.5rem 15rem 1fr; align-items: baseline; }
}
.step-depth {
  font-family: var(--f-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--metal);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.step h3 {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  line-height: 1;
  margin: 0;
}
.step p { margin: 0; color: var(--ink-2); max-width: 40rem; }

/* ---------- commitments ---------- */

.holds {
  display: grid;
  gap: 1px;
  grid-template-columns: 1fr 1fr;
  margin-top: clamp(3rem, 6vw, 4.5rem);
  background: var(--line-2);
  border: 1px solid var(--line-2);
}
@media (min-width: 880px) { .holds { grid-template-columns: repeat(4, 1fr); } }

.hold {
  background: var(--panel);
  padding: clamp(1.2rem, 2vw, 1.7rem);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.hold b {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: 1.02rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.hold span { font-size: 0.875rem; color: var(--ink-3); line-height: 1.5; }

/* ============================================================
   CONTACT
   ============================================================ */

.drop {
  display: grid;
  gap: clamp(2rem, 5vw, 4rem);
  grid-template-columns: 1fr;
  align-items: end;
}
@media (min-width: 900px) { .drop { grid-template-columns: 1.15fr 1fr; } }

.drop h2 {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(2.6rem, 8vw, 6rem);
  line-height: 0.86;
  letter-spacing: -0.025em;
  text-transform: uppercase;
  margin: 0 0 1.25rem;
  text-wrap: balance;
}
.drop h2 em { font-style: normal; color: var(--accent); }
.drop-cta { margin: 1.75rem 0 0; }

.contact-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; }
.contact-list li { border-top: 1px solid var(--line-2); }
.contact-list li:last-child { border-bottom: 1px solid var(--line-2); }

.contact-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.05rem 0.2rem;
  text-decoration: none;
  color: var(--ink);
  transition: padding-left 220ms ease, color 220ms ease;
}
.contact-row:hover { padding-left: 0.7rem; color: var(--accent); }
.contact-row .k {
  font-family: var(--f-mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.contact-row .v { font-family: var(--f-mono); font-size: 0.94rem; }