/* ==========================================================================
   B3N INDUSTRIES — TCD-001
   Design system: "Technical Control Document"
   Ink ground, silver hairlines, one hot signal (orange), mono annotation.
   Zero JavaScript. Scroll reveals are progressive enhancement only.
   ========================================================================== */

:root {
  /* --- Brand marks (sampled from the Aug 2026 TCD artwork) --- */
  --brand-blue: #365fab;
  --brand-orange: #e57224;
  --brand-teal: #116e6b;
  --brand-slate: #40576b;
  --brand-silver: #a7a9ac;
  --brand-black: #221f1f;

  /* --- Surface --- */
  --ink: #0b0c0e;
  --ink-raise: #101216;
  --ink-sink: #07080a;
  --bone: #edebe6;
  --muted: #868d97;
  --faint: #5b626c;

  --line: rgba(167, 169, 172, 0.16);
  --line-strong: rgba(167, 169, 172, 0.34);

  /* --- Type --- */
  --f-display: "Archivo", "Arial Black", sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "Courier New", monospace;
  --f-body: "IBM Plex Sans", "Segoe UI", sans-serif;

  /* --- Theme: signal (default) --- */
  --accent: var(--brand-orange);
  --accent-ink: var(--brand-black);
  --accent-wash: rgba(229, 114, 36, 0.05);
  --glow-a: rgba(229, 114, 36, 0.13);
  --glow-b: rgba(54, 95, 171, 0.12);
  --glow-plate: rgba(229, 114, 36, 0.16);
  --swatch-next: var(--brand-blue);

  /* --- Metrics --- */
  --gutter: clamp(18px, 5vw, 84px);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---- Theme: blue ------------------------------------------------------- */
[data-theme="blue"] {
  --accent: var(--brand-blue);
  --accent-ink: var(--bone);
  --accent-wash: rgba(54, 95, 171, 0.06);
  --glow-a: rgba(54, 95, 171, 0.16);
  --glow-b: rgba(167, 169, 172, 0.07);
  --glow-plate: rgba(54, 95, 171, 0.2);
  --swatch-next: var(--brand-orange);
}

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

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  background: var(--accent);
  color: var(--ink);
  font: 600 10px var(--f-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transform: translateY(calc(-100% - 24px));
}
.skip-link:focus {
  transform: none;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  background-color: var(--ink);
  color: var(--bone);
  font-family: var(--f-body);
  font-weight: 300;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Fixed atmosphere: drafting grid + signal glow + film grain -------------- */
.backdrop {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-color: var(--ink);
  background-image:
    radial-gradient(60% 45% at 78% 8%, var(--glow-a) 0%, transparent 70%),
    radial-gradient(50% 40% at 8% 82%, var(--glow-b) 0%, transparent 72%),
    linear-gradient(rgba(167, 169, 172, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(167, 169, 172, 0.045) 1px, transparent 1px),
    linear-gradient(rgba(167, 169, 172, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(167, 169, 172, 0.09) 1px, transparent 1px);
  background-size:
    auto,
    auto,
    24px 24px,
    24px 24px,
    120px 120px,
    120px 120px;
}

.grain {
  position: fixed;
  inset: -50%;
  z-index: -1;
  pointer-events: none;
  opacity: 0.4;
  mix-blend-mode: overlay;
  background-image: url("images/grain.svg");
}

/* ---- Shared type utilities --------------------------------------------- */
.display {
  font-family: var(--f-display);
  font-weight: 900;
  font-variation-settings:
    "wdth" 116,
    "wght" 900;
  text-transform: uppercase;
  line-height: 0.85;
  letter-spacing: -0.015em;
}

.mono {
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.hot {
  color: var(--accent);
}
.cool {
  color: var(--brand-blue);
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px var(--gutter);
  border-bottom: 1px solid var(--line);
  background: rgba(11, 12, 14, 0.72);
  backdrop-filter: blur(16px) saturate(130%);
  -webkit-backdrop-filter: blur(16px) saturate(130%);
}

.nav__mark {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}
.nav__mark img {
  height: 26px;
  width: auto;
  display: block;
}

.nav__mark .sig {
  font-family: var(--f-mono);
  font-size: 9.5px;
  letter-spacing: 0.3em;
  color: var(--faint);
  padding-left: 14px;
  border-left: 1px solid var(--line);
  line-height: 1.5;
  text-transform: uppercase;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 40px);
}

.nav__links a {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
  padding: 6px 0;
  transition: color 0.3s var(--ease);
}

.nav__links a i {
  font-style: normal;
  font-size: 9px;
  color: var(--faint);
  transition: color 0.3s var(--ease);
}

.nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.35s var(--ease);
}

.nav__links a:hover,
.nav__links a[aria-current="page"] {
  color: var(--bone);
}
.nav__links a:hover i {
  color: var(--accent);
}
.nav__links a:hover::after,
.nav__links a[aria-current="page"]::after {
  width: 100%;
}

@media (max-width: 620px) {
  .nav {
    flex-wrap: wrap;
    gap: 10px 16px;
    padding-bottom: 10px;
  }
  .nav__mark .sig {
    display: none;
  }
  .nav__links {
    width: 100%;
    justify-content: flex-start;
    gap: 24px;
  }
  .nav__links a {
    font-size: 9.5px;
    letter-spacing: 0.12em;
    padding: 2px 0;
  }
  .nav__links a i {
    display: none;
  }
}

/* ==========================================================================
   VERTICAL EDGE RAIL (decorative)
   ========================================================================== */
.rail {
  position: fixed;
  left: 22px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 40;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  pointer-events: none;
}

.rail span {
  writing-mode: vertical-rl;
  font-family: var(--f-mono);
  font-size: 9.5px;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--faint);
}

.rail .tick {
  width: 1px;
  height: 90px;
  background: linear-gradient(var(--line-strong), transparent);
}

@media (max-width: 1240px) {
  .rail {
    display: none;
  }
}

/* ==========================================================================
   SECTION FRAME
   ========================================================================== */
.section {
  padding: clamp(72px, 11vw, 152px) var(--gutter);
  position: relative;
}
.section--tight {
  padding-top: clamp(48px, 7vw, 96px);
}

.section__head {
  display: flex;
  align-items: baseline;
  justify-content: flex-start;
  gap: clamp(14px, 2vw, 26px);
  padding-bottom: 18px;
  margin-bottom: clamp(36px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
}

.section__head h2 {
  font-family: var(--f-display);
  font-weight: 800;
  font-variation-settings:
    "wdth" 112,
    "wght" 800;
  font-size: clamp(1.6rem, 3.4vw, 2.9rem);
  text-transform: uppercase;
  letter-spacing: -0.01em;
  line-height: 1;
}

.section__head .idx {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--accent);
}

.section__head .note {
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--faint);
  text-align: right;
  margin-left: auto;
}

@media (max-width: 660px) {
  .section__head {
    flex-wrap: wrap;
  }
  .section__head .note {
    text-align: left;
    width: 100%;
    margin-left: 0;
  }
}

/* ==========================================================================
   HERO
   ========================================================================== */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  align-items: center;
  gap: clamp(28px, 5vw, 76px);
  padding: clamp(18px, 2.4vw, 34px) var(--gutter) clamp(26px, 4vw, 52px);
}

.hero__stamp {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 26px;
  padding: 5px 12px 5px 10px;
  border: 1px solid var(--line-strong);
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero__stamp b {
  width: 6px;
  height: 6px;
  background: var(--accent);
  display: inline-block;
  animation: pulse 2.6s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.25;
  }
}

.hero h1 {
  font-family: var(--f-display);
  font-weight: 900;
  font-variation-settings:
    "wdth" 118,
    "wght" 900;
  font-size: clamp(2.7rem, 5.9vw, 5.2rem);
  line-height: 0.84;
  letter-spacing: -0.025em;
  text-transform: uppercase;
  margin-bottom: 26px;
}

.hero h1 .ghost {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--brand-silver);
  opacity: 0.72;
}

.hero__lede {
  max-width: 46ch;
  font-size: clamp(0.98rem, 1.15vw, 1.08rem);
  line-height: 1.75;
  color: var(--muted);
  padding-left: 18px;
  border-left: 1px solid var(--line-strong);
  margin-bottom: 34px;
}

.hero__lede strong {
  color: var(--bone);
  font-weight: 500;
}

/* Actions ---------------------------------------------------------------- */
.actions {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 15px 26px;
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  text-decoration: none;
  overflow: hidden;
  transition:
    transform 0.3s var(--ease),
    color 0.3s var(--ease),
    border-color 0.3s var(--ease);
}

.btn--solid {
  background: var(--accent);
  color: var(--accent-ink);
  clip-path: polygon(
    0 0,
    100% 0,
    100% calc(100% - 12px),
    calc(100% - 12px) 100%,
    0 100%
  );
}

.btn--solid::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--bone);
  transform: translateY(101%);
  transition: transform 0.4s var(--ease);
  z-index: 0;
}

.btn--solid span {
  position: relative;
  z-index: 1;
}
.btn--solid:hover::before {
  transform: translateY(0);
}
.btn--solid:hover {
  transform: translateY(-2px);
}

.btn--wire {
  color: var(--bone);
  border: 1px solid var(--line-strong);
  background: transparent;
}
.btn--wire:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn .arrow {
  transition: transform 0.35s var(--ease);
}
.btn:hover .arrow {
  transform: translateX(4px);
}

/* Product drawing plate --------------------------------------------------- */
.plate {
  position: relative;
  display: grid;
  place-items: center;
  padding: clamp(28px, 4vw, 54px);
  min-height: clamp(340px, 46vw, 560px);
  border: 1px solid var(--line);
  background:
    linear-gradient(160deg, rgba(167, 169, 172, 0.05), transparent 62%),
    rgba(7, 8, 10, 0.45);
}

.plate::before,
.plate::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border: 1px solid var(--accent);
}

.plate::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}
.plate::after {
  bottom: -1px;
  right: -1px;
  border-left: 0;
  border-top: 0;
}

.plate__glow {
  position: absolute;
  width: 62%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, var(--glow-plate) 0%, transparent 68%);
  filter: blur(6px);
  pointer-events: none;
}

.plate__ring {
  position: absolute;
  width: min(78%, 380px);
  aspect-ratio: 1;
  border: 1px dashed rgba(167, 169, 172, 0.18);
  border-radius: 50%;
  animation: spin 46s linear infinite;
  pointer-events: none;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.plate .product {
  position: relative;
  width: 100%;
  max-width: 296px;
  height: auto;
  filter: drop-shadow(-14px 22px 40px rgba(0, 0, 0, 0.8));
  animation: float 7s ease-in-out infinite;
  transition: transform 0.6s var(--ease);
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-12px) rotate(-0.8deg);
  }
}

/* Nothing inside the drawing plate is text you would want to select. */
.plate,
.plate * {
  -webkit-user-select: none;
  user-select: none;
}

.plate img,
.plate svg {
  -webkit-user-drag: none;
}

/* Grab handle: drag the unit around, let go and it returns to the drawing. */
.plate__grab {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  cursor: grab;
  touch-action: pan-y;
  transition: transform 0.72s cubic-bezier(0.2, 1.42, 0.36, 1);
  will-change: transform;
}

.plate__grab:active {
  cursor: grabbing;
}

.plate__grab.is-dragging {
  cursor: grabbing;
  transition: none;
  z-index: 2;
}

.plate__grab.is-dragging .product {
  animation-play-state: paused;
}

.dim {
  position: absolute;
  font-family: var(--f-mono);
  font-size: 9.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faint);
  white-space: nowrap;
}

.dim--w {
  left: 50%;
  bottom: 14px;
  transform: translateX(-50%);
}
.dim--h {
  right: 12px;
  top: 50%;
  transform: translateY(-50%) rotate(90deg);
}
.dim--id {
  left: 16px;
  top: 14px;
  color: var(--brand-silver);
}

.callout {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--f-mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.callout::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--line-strong);
}
.callout b {
  color: var(--accent);
  font-weight: 600;
}
.callout--a {
  left: 12px;
  top: 28%;
}
.callout--b {
  right: 12px;
  bottom: 26%;
  flex-direction: row-reverse;
}

@media (max-width: 1000px) {
  .hero {
    grid-template-columns: 1fr;
  }
  .callout {
    display: none;
  }
}

/* Stat rail -------------------------------------------------------------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin: 0 var(--gutter);
}

.stats div {
  padding: 22px 20px;
  border-left: 1px solid var(--line);
  transition: background 0.4s var(--ease);
}

.stats div:first-child {
  border-left: 0;
}
.stats div:hover {
  background: rgba(167, 169, 172, 0.04);
}

.stats dt {
  font-family: var(--f-mono);
  font-size: 9.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 8px;
}

.stats dd {
  font-family: var(--f-display);
  font-weight: 700;
  font-variation-settings:
    "wdth" 110,
    "wght" 700;
  font-size: clamp(1.35rem, 2.6vw, 2.1rem);
  line-height: 1;
  letter-spacing: -0.01em;
}

.stats dd small {
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-left: 4px;
}

@media (max-width: 760px) {
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats div:nth-child(3) {
    border-left: 0;
  }
  .stats div:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 1100px) and (min-width: 761px) {
  .nav {
    padding-inline: 24px;
  }
  .nav__links {
    gap: 14px;
  }
  .nav__links a {
    font-size: 9px;
    letter-spacing: 0.1em;
  }
  .nav__mark .sig {
    display: none;
  }
}

/* ==========================================================================
   SIGNAL BAND (orange texture marquee)
   ========================================================================== */
.band {
  position: relative;
  overflow: hidden;
  padding: 18px 0;
  background: var(--accent) url("images/background-candidate1.png") center /
    cover;
  border-top: 1px solid rgba(34, 31, 31, 0.35);
  border-bottom: 1px solid rgba(34, 31, 31, 0.35);
}

.band__track {
  display: flex;
  width: max-content;
  animation: slide 34s linear infinite;
}

.band__track span {
  display: inline-flex;
  align-items: center;
  gap: 30px;
  padding-right: 30px;
  font-family: var(--f-display);
  font-weight: 800;
  font-variation-settings:
    "wdth" 112,
    "wght" 800;
  font-size: clamp(1.1rem, 2.4vw, 1.85rem);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--brand-black);
  white-space: nowrap;
}

.band__track em {
  font-style: normal;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  opacity: 0.7;
}

[data-theme="blue"] .band {
  background-image: url("images/background2.png");
}

/* Black type is legible on the orange wall, not on the blue one. */
[data-theme="blue"] .band__track span {
  color: var(--bone);
}
[data-theme="blue"] .band__track em {
  opacity: 0.62;
}

@keyframes slide {
  to {
    transform: translateX(-50%);
  }
}

/* ==========================================================================
   BUILD SEQUENCE
   ========================================================================== */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
}

.step {
  position: relative;
  padding: 34px 26px 44px;
  border-left: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background 0.45s var(--ease);
}

.step:first-child {
  border-left: 0;
}

.step::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.5s var(--ease);
}

.step:hover {
  background: var(--accent-wash);
}
.step:hover::after {
  width: 100%;
}

.step .num {
  font-family: var(--f-display);
  font-weight: 900;
  font-variation-settings:
    "wdth" 116,
    "wght" 900;
  font-size: clamp(2.6rem, 5vw, 4.2rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(167, 169, 172, 0.42);
  margin-bottom: 20px;
  transition:
    color 0.45s var(--ease),
    -webkit-text-stroke-color 0.45s var(--ease);
}

.step:hover .num {
  color: var(--accent);
  -webkit-text-stroke-color: transparent;
}

.step h3 {
  font-family: var(--f-body);
  font-weight: 500;
  font-size: 1.02rem;
  letter-spacing: 0.02em;
  margin-bottom: 10px;
}
.step p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--muted);
}

.step .tag {
  position: absolute;
  top: 34px;
  right: 26px;
  font-family: var(--f-mono);
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--faint);
}

@media (max-width: 980px) {
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
  .step:nth-child(3) {
    border-left: 0;
  }
}

@media (max-width: 560px) {
  .steps {
    grid-template-columns: 1fr;
  }
  .step {
    border-left: 0;
  }
}

/* ==========================================================================
   SPECIFICATION
   ========================================================================== */
.spec-wrap {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: clamp(30px, 5vw, 72px);
  align-items: start;
}

.spec .row {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.spec .row:first-child {
  border-top: 1px solid var(--line);
}

.spec dt {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--faint);
  flex: 0 0 auto;
}

.spec .lead {
  flex: 1 1 auto;
  height: 1px;
  background-image: linear-gradient(
    90deg,
    var(--line-strong) 40%,
    transparent 40%
  );
  background-size: 5px 1px;
  transform: translateY(-3px);
}

.spec dd {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--bone);
  flex: 0 0 auto;
  transition: color 0.3s var(--ease);
}

.spec .row:hover dd {
  color: var(--accent);
}

.notice {
  padding: 28px;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(54, 95, 171, 0.09), transparent 60%);
}

.notice h4 {
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--brand-blue);
  margin-bottom: 14px;
}

.notice p {
  font-size: 0.93rem;
  color: var(--muted);
  line-height: 1.75;
}
.notice p + p {
  margin-top: 12px;
}

@media (max-width: 900px) {
  .spec-wrap {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   IDENTITY / COLOURWAYS
   ========================================================================== */
.marks {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1px;
  background: rgba(34, 31, 31, 0.22);
  border: 1px solid var(--line);
}

.mark {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 26px 22px 20px;
  background: var(--bone);
  transition: background 0.45s var(--ease);
}

.mark img {
  width: 100%;
  max-width: 168px;
  height: auto;
  align-self: center;
  margin: auto 0;
  transition: transform 0.5s var(--ease);
}

.mark:hover {
  background: #f7f5f1;
}
.mark:hover img {
  transform: scale(1.05);
}

.mark .meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid rgba(34, 31, 31, 0.18);
  font-family: var(--f-mono);
  font-size: 9.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(34, 31, 31, 0.62);
}

.mark .chip {
  width: 12px;
  height: 12px;
  flex: 0 0 auto;
}

/* Tiles sit on bone: the lockups carry black elements by design. */

/* ==========================================================================
   CLOSING CALL
   ========================================================================== */
.close {
  position: relative;
  overflow: hidden;
  padding: clamp(72px, 11vw, 148px) var(--gutter);
  border-top: 1px solid var(--line);
  text-align: center;
}

.close__mark {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(120%, 1100px);
  opacity: 0.05;
  pointer-events: none;
  filter: grayscale(1);
}

.close h2 {
  position: relative;
  font-family: var(--f-display);
  font-weight: 900;
  font-variation-settings:
    "wdth" 118,
    "wght" 900;
  font-size: clamp(2.1rem, 6.4vw, 5rem);
  line-height: 0.88;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
}

.close p {
  position: relative;
  max-width: 52ch;
  margin: 0 auto 36px;
  color: var(--muted);
}
.close .actions {
  position: relative;
  justify-content: center;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.foot {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 34px;
  padding: 48px var(--gutter) 26px;
  border-top: 1px solid var(--line);
  background: var(--ink-sink);
}

.foot img {
  height: 34px;
  width: auto;
  margin-bottom: 16px;
}
.foot p {
  font-size: 0.86rem;
  color: var(--faint);
  max-width: 34ch;
}

.foot h5 {
  font-family: var(--f-mono);
  font-size: 9.5px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}

.foot ul {
  list-style: none;
  display: grid;
  gap: 9px;
}

.foot a {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--faint);
  text-decoration: none;
  transition: color 0.3s var(--ease);
}

.foot a:hover {
  color: var(--accent);
}

.foot__base {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 14px var(--gutter);
  border-top: 1px solid var(--line);
  background: var(--ink-sink);
  font-family: var(--f-mono);
  font-size: 9.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--faint);
}

@media (max-width: 780px) {
  .foot {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 520px) {
  .foot {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   INTERIOR PAGES
   ========================================================================== */
.page-head {
  padding: clamp(56px, 9vw, 120px) var(--gutter) clamp(34px, 5vw, 60px);
  border-bottom: 1px solid var(--line);
}

.page-head .idx {
  display: block;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}

.page-head h1 {
  font-family: var(--f-display);
  font-weight: 900;
  font-variation-settings:
    "wdth" 118,
    "wght" 900;
  font-size: clamp(2.6rem, 7.4vw, 5.8rem);
  line-height: 0.84;
  letter-spacing: -0.025em;
  text-transform: uppercase;
  margin-bottom: 22px;
}

.page-head h1 .ghost {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--brand-silver);
  opacity: 0.72;
}
.page-head p {
  max-width: 56ch;
  color: var(--muted);
}

.prose-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(28px, 5vw, 76px);
  align-items: start;
}

.prose-grid h3 {
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--brand-silver);
}

.prose p {
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--muted);
}
.prose p + p {
  margin-top: 20px;
}
.prose p strong {
  color: var(--bone);
  font-weight: 500;
}

@media (max-width: 860px) {
  .prose-grid {
    grid-template-columns: 1fr;
  }
}

/* Log / timeline ---------------------------------------------------------- */
.log {
  border-top: 1px solid var(--line);
}

.log__row {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  transition:
    padding-left 0.4s var(--ease),
    background 0.4s var(--ease);
}

.log__row:hover {
  padding-left: 14px;
  background: rgba(167, 169, 172, 0.03);
}

.log__row time {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  padding-top: 4px;
}

.log__row h4 {
  font-family: var(--f-body);
  font-weight: 500;
  font-size: 1.02rem;
  margin-bottom: 6px;
}
.log__row p {
  font-size: 0.92rem;
  color: var(--muted);
  max-width: 62ch;
}

@media (max-width: 620px) {
  .log__row {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

/* Contact cards ----------------------------------------------------------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 30px 26px 34px;
  background: var(--ink);
  text-decoration: none;
  color: inherit;
  transition: background 0.4s var(--ease);
}

.card:hover {
  background: var(--ink-raise);
}

.card .k {
  font-family: var(--f-mono);
  font-size: 9.5px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--faint);
}

.card .v {
  font-family: var(--f-display);
  font-weight: 700;
  font-variation-settings:
    "wdth" 110,
    "wght" 700;
  font-size: clamp(1.05rem, 1.8vw, 1.3rem);
  text-transform: uppercase;
  word-break: break-word;
}

.card .d {
  font-size: 0.88rem;
  color: var(--muted);
}

a.card::after {
  content: "\2192";
  position: absolute;
  right: 24px;
  bottom: 28px;
  color: var(--faint);
  transition:
    transform 0.35s var(--ease),
    color 0.35s var(--ease);
}

a.card:hover::after {
  transform: translateX(4px);
  color: var(--accent);
}

/* ==========================================================================
   MOTION — entry choreography + scroll reveal (progressive enhancement)
   ========================================================================== */
@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(26px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.rise {
  animation: riseIn 0.9s var(--ease) both;
}
.d1 {
  animation-delay: 0.06s;
}
.d2 {
  animation-delay: 0.14s;
}
.d3 {
  animation-delay: 0.22s;
}
.d4 {
  animation-delay: 0.3s;
}
.d5 {
  animation-delay: 0.4s;
}
.d6 {
  animation-delay: 0.5s;
}

/* Reveal on scroll only where the browser supports scroll-driven animation.
   Outside @supports the content simply renders — no JS, nothing ever hidden. */
@supports (animation-timeline: view()) {
  .reveal {
    animation: riseIn 1s var(--ease) both;
    animation-timeline: view();
    animation-range: entry 4% cover 26%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ==========================================================================
   ONE-SCREEN SHEET (contact) — everything inside a single viewport
   ========================================================================== */
body.sheet {
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

body.sheet .nav {
  position: static;
}

.sheet__main {
  flex: 1 1 auto;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(24px, 4vw, 68px);
  align-items: center;
  padding: clamp(16px, 3vh, 44px) var(--gutter);
}

.sheet__lead .idx {
  display: block;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: clamp(10px, 1.6vh, 18px);
}

.sheet__lead h1 {
  font-family: var(--f-display);
  font-weight: 900;
  font-variation-settings:
    "wdth" 118,
    "wght" 900;
  font-size: clamp(2.1rem, min(4.6vw, 7.6vh), 4.6rem);
  line-height: 0.86;
  letter-spacing: -0.025em;
  text-transform: uppercase;
  margin-bottom: clamp(12px, 2vh, 22px);
}

.sheet__lead h1 .ghost {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--brand-silver);
  opacity: 0.72;
}

.sheet__lead > p {
  max-width: 42ch;
  font-size: clamp(0.86rem, 1vw, 1rem);
  line-height: 1.7;
  color: var(--muted);
}

.sheet__mail {
  display: inline-block;
  margin: clamp(14px, 2.4vh, 26px) 0 clamp(10px, 1.6vh, 16px);
  padding-bottom: 4px;
  border-bottom: 1px solid var(--line-strong);
  font-family: var(--f-mono);
  font-size: clamp(0.8rem, 1.05vw, 0.98rem);
  letter-spacing: 0.06em;
  color: var(--bone);
  text-decoration: none;
  transition:
    color 0.3s var(--ease),
    border-color 0.3s var(--ease);
}

.sheet__mail:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.sheet__note {
  max-width: 40ch;
  font-family: var(--f-mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  line-height: 1.9;
  color: var(--faint);
}

.sheet__cards {
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  align-self: center;
  width: 100%;
  height: min(100%, 520px);
}

.sheet__cards .card {
  justify-content: center;
}

.sheet__cards .card {
  padding: clamp(16px, 2.6vh, 28px) clamp(16px, 1.6vw, 24px);
  gap: clamp(6px, 1vh, 11px);
}
.sheet__cards .card .v {
  font-size: clamp(0.95rem, 1.35vw, 1.2rem);
}
.sheet__cards .card .d {
  font-size: clamp(0.76rem, 0.86vw, 0.86rem);
  line-height: 1.6;
}
.sheet__cards a.card::after {
  right: 18px;
  bottom: 16px;
}

body.sheet .foot__base {
  flex: 0 0 auto;
}

@media (max-width: 900px) {
  .sheet__main {
    grid-template-columns: 1fr;
    align-content: center;
    gap: clamp(16px, 2.6vh, 30px);
  }
  .sheet__note {
    display: none;
  }
  .sheet__lead > p {
    max-width: 52ch;
  }
}

@media (max-width: 560px) {
  .sheet__cards .card .d {
    display: none;
  }
  .sheet__cards a.card::after {
    bottom: 14px;
  }
  .sheet__lead > p {
    font-size: 0.85rem;
  }
}

/* Below this height a single screen would clip: let the page scroll instead. */
@media (max-height: 560px) {
  body.sheet {
    height: auto;
    overflow: visible;
  }
  .sheet__cards .card .d {
    display: block;
  }
}

/* ==========================================================================
   THEME SWITCH
   ========================================================================== */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-left: clamp(14px, 2vw, 28px);
  padding: 6px 12px 6px 9px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--muted);
  font-family: var(--f-mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    color 0.3s var(--ease),
    border-color 0.3s var(--ease);
}

.theme-toggle:hover {
  color: var(--bone);
  border-color: var(--swatch-next);
}
.theme-toggle:focus-visible {
  outline: 1px solid var(--swatch-next);
  outline-offset: 2px;
}

.theme-toggle__dot {
  width: 11px;
  height: 11px;
  flex: 0 0 auto;
  background: var(--swatch-next);
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.35);
  transition:
    background 0.3s var(--ease),
    transform 0.3s var(--ease);
}

.theme-toggle:hover .theme-toggle__dot {
  transform: scale(1.15);
}

.theme-toggle .t-blue {
  display: inline;
}
.theme-toggle .t-signal {
  display: none;
}
[data-theme="blue"] .theme-toggle .t-blue {
  display: none;
}
[data-theme="blue"] .theme-toggle .t-signal {
  display: inline;
}

@media (max-width: 620px) {
  .theme-toggle {
    margin-left: auto;
    padding: 5px 10px 5px 8px;
  }
}

/* Brief cross-fade while the palette swaps. */
.theme-shift,
.theme-shift *,
.theme-shift *::before,
.theme-shift *::after {
  transition:
    background-color 0.42s ease,
    border-color 0.42s ease,
    color 0.42s ease,
    fill 0.42s ease,
    stroke 0.42s ease !important;
}

/* The drawing follows the accent too. */
.product .stitch {
  stroke: var(--accent);
}
.product .diag {
  fill: var(--accent);
}