/* ============================================================
   OBSIDIAN BLOOM — style
   Palette: Obsidian #08080B · Charcoal Veil #15151C · Smoke #8B8B96
            Porcelain #E8E6E1 · Champagne #C8A96A · Deep Gold #8A6D3B
   Type:    Italiana (display) · Manrope (body)
   ============================================================ */

:root {
  --obsidian: #08080b;
  --veil: #15151c;
  --smoke: #8b8b96;
  --porcelain: #e8e6e1;
  --champagne: #c8a96a;
  --deep-gold: #8a6d3b;
  --display: 'Italiana', serif;
  --body: 'Manrope', system-ui, sans-serif;
}

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

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

body {
  background: var(--obsidian);
  color: var(--porcelain);
  font-family: var(--body);
  font-weight: 300;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(200, 169, 106, 0.25); color: var(--porcelain); }

/* ---------- canvas & atmosphere layers ---------- */

#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  display: block;
}

#fallback {
  position: fixed;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  text-align: center;
  color: var(--smoke);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  line-height: 2;
  background:
    radial-gradient(60% 50% at 50% 60%, rgba(200,169,106,0.06), transparent 70%),
    radial-gradient(120% 90% at 50% 30%, #101016, var(--obsidian) 75%);
}
#fallback[hidden] { display: none; }

.grain {
  position: fixed;
  inset: -60px;
  z-index: 5;
  pointer-events: none;
  opacity: 0.055;
  mix-blend-mode: overlay;
  /* background-image injected by JS (generated noise tile) */
}
@media (prefers-reduced-motion: no-preference) {
  .grain { animation: grain-shift 0.9s steps(3) infinite; }
}
@keyframes grain-shift {
  0% { transform: translate(0, 0); }
  33% { transform: translate(-18px, 12px); }
  66% { transform: translate(14px, -20px); }
  100% { transform: translate(0, 0); }
}

.vignette {
  position: fixed;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  background:
    radial-gradient(120% 100% at 50% 45%, transparent 55%, rgba(3, 3, 5, 0.55) 100%);
}

/* ---------- loader ---------- */

#loader {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: var(--obsidian);
  display: grid;
  place-content: center;
  gap: 1.4rem;
  justify-items: center;
  transition: opacity 0.9s ease, visibility 0.9s;
}
#loader.done { opacity: 0; visibility: hidden; }
.loader-mark {
  font-family: var(--display);
  font-size: clamp(1rem, 2.4vw, 1.4rem);
  letter-spacing: 0.55em;
  padding-left: 0.55em; /* optical centering */
  color: var(--porcelain);
}
.loader-line {
  width: min(220px, 40vw);
  height: 1px;
  background: rgba(232, 230, 225, 0.12);
  overflow: hidden;
}
.loader-line span {
  display: block;
  height: 100%;
  width: 100%;
  background: var(--champagne);
  transform: translateX(-100%);
  animation: load-sweep 1.4s cubic-bezier(0.65, 0, 0.35, 1) infinite;
}
@keyframes load-sweep {
  0% { transform: translateX(-100%); }
  55% { transform: translateX(0); }
  100% { transform: translateX(100%); }
}
@media (prefers-reduced-motion: reduce) {
  .loader-line span { animation: none; transform: none; }
}

/* ---------- chrome (UI) ---------- */

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.6rem clamp(1.4rem, 4vw, 3.2rem);
  mix-blend-mode: normal;
}
.wordmark {
  font-family: var(--display);
  font-size: 0.95rem;
  letter-spacing: 0.42em;
  color: var(--porcelain);
  text-decoration: none;
}
.topbar::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(rgba(8, 8, 11, 0.82), rgba(8, 8, 11, 0.55) 60%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}
.topbar.scrolled::before { opacity: 1; }
.topnav {
  display: flex;
  align-items: center;
  gap: clamp(0.9rem, 2.4vw, 2rem);
}
.topnav .anchor {
  font-size: 0.64rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--smoke);
  text-decoration: none;
  position: relative;
  padding: 0.4em 0;
  transition: color 0.35s ease;
}
.topnav .anchor::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--champagne);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}
.topnav .anchor:hover { color: var(--porcelain); }
.topnav .anchor:hover::after { transform: scaleX(1); }
.navlink {
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--smoke);
  text-decoration: none;
  padding: 0.55em 1.1em;
  border: 1px solid rgba(232, 230, 225, 0.16);
  border-radius: 2em;
  transition: color 0.4s ease, border-color 0.4s ease, background 0.4s ease;
}
.navlink:hover {
  color: var(--obsidian);
  background: var(--champagne);
  border-color: var(--champagne);
}

.hud {
  position: fixed;
  left: clamp(1.4rem, 4vw, 3.2rem);
  bottom: 1.7rem;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 1.1rem;
  color: var(--smoke);
}
.hud-bloom {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.66rem;
  letter-spacing: 0.3em;
}
#bloomPct {
  color: var(--champagne);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  min-width: 2.6em;
  text-align: right;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
}
.hud-unit { letter-spacing: 0; color: var(--champagne); font-size: 0.66rem; }
.hud-track {
  width: 110px;
  height: 1px;
  background: rgba(232, 230, 225, 0.12);
  overflow: hidden;
}
#hudBar {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--deep-gold), var(--champagne));
  transform-origin: left;
  transform: scaleX(0);
}

/* ---------- sections ---------- */

main { position: relative; z-index: 10; }

.sec {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 0 clamp(1.4rem, 6vw, 6rem);
  pointer-events: none;
}
.sec a, .sec .guide-link { pointer-events: auto; }

.hero { justify-content: center; text-align: center; }
.hero-inner { max-width: 46rem; }

.eyebrow {
  font-size: 0.66rem;
  font-weight: 400;
  letter-spacing: 0.44em;
  color: var(--champagne);
  margin-bottom: 1.6rem;
}

h1 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(4rem, 14vw, 10.5rem);
  line-height: 0.92;
  letter-spacing: 0.02em;
  color: var(--porcelain);
  text-shadow: 0 0 80px rgba(200, 169, 106, 0.12);
}

.sub {
  margin: 2rem auto 0;
  max-width: 30rem;
  color: var(--smoke);
  font-size: 0.95rem;
  line-height: 1.9;
  letter-spacing: 0.02em;
}

.cue {
  margin-top: 4rem;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
}
.cue-line {
  width: 1px;
  height: 56px;
  background: linear-gradient(to bottom, transparent, var(--champagne));
}
@media (prefers-reduced-motion: no-preference) {
  .cue-line {
    animation: cue-pulse 2.6s cubic-bezier(0.65, 0, 0.35, 1) infinite;
  }
  @keyframes cue-pulse {
    0%, 100% { transform: scaleY(0.55); opacity: 0.4; transform-origin: top; }
    50% { transform: scaleY(1); opacity: 1; transform-origin: top; }
  }
}
.cue-text {
  font-size: 0.6rem;
  letter-spacing: 0.5em;
  padding-left: 0.5em;
  color: var(--smoke);
}

.right { justify-content: flex-end; }
.left { justify-content: flex-start; }

.block { max-width: 24rem; }
.right .block { text-align: right; }

.num {
  font-family: var(--display);
  font-size: 1.1rem;
  color: var(--champagne);
  letter-spacing: 0.3em;
  margin-bottom: 1.1rem;
}
.num::after {
  content: "";
  display: block;
  width: 2.6rem;
  height: 1px;
  background: var(--deep-gold);
  margin-top: 1.1rem;
}
.right .num::after { margin-left: auto; }

h2 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(2.4rem, 5.4vw, 4.2rem);
  line-height: 1.02;
  margin-bottom: 1.4rem;
  color: var(--porcelain);
}

.body {
  color: var(--smoke);
  font-size: 0.92rem;
  line-height: 2;
  letter-spacing: 0.015em;
}
.body em {
  font-style: normal;
  color: var(--champagne);
  letter-spacing: 0.04em;
}

/* ---------- anatomy / footer ---------- */

.anatomy { justify-content: center; text-align: center; padding-top: 8vh; }
.anatomy-inner { max-width: 44rem; }
.anatomy h2 { font-size: clamp(2.6rem, 6.4vw, 5rem); }

.spec {
  margin: 3.2rem 0 3rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.8rem 2.4rem;
  text-align: left;
}
.spec div {
  border-top: 1px solid rgba(232, 230, 225, 0.12);
  padding-top: 0.9rem;
}
.spec dt {
  font-size: 0.6rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--champagne);
  margin-bottom: 0.5rem;
}
.spec dd {
  font-size: 0.82rem;
  color: var(--smoke);
  line-height: 1.6;
}

.guide-link {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  font-family: var(--display);
  font-size: 1.25rem;
  letter-spacing: 0.12em;
  color: var(--porcelain);
  text-decoration: none;
  padding: 1rem 2.1rem;
  border: 1px solid rgba(200, 169, 106, 0.45);
  border-radius: 3rem;
  transition: background 0.45s ease, color 0.45s ease, box-shadow 0.45s ease;
}
.guide-link .arrow { transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1); }
.guide-link:hover {
  background: var(--champagne);
  color: var(--obsidian);
  box-shadow: 0 0 60px rgba(200, 169, 106, 0.25);
}
.guide-link:hover .arrow { transform: translateX(6px); }

.colophon {
  margin-top: 2.6rem;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: rgba(139, 139, 150, 0.7);
  line-height: 2;
}

/* ---------- atelier (interactive station) ---------- */

.atelier { pointer-events: none; }
.atelier-inner {
  width: 100%;
  max-width: 68rem;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 24rem);
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
}
.atelier-copy { max-width: 24rem; }

.bench {
  pointer-events: auto;
  background: rgba(10, 10, 14, 0.58);
  border: 1px solid rgba(232, 230, 225, 0.12);
  border-radius: 0.4rem;
  padding: 1.8rem 1.9rem 1.6rem;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(232, 230, 225, 0.05);
}
.bench-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.58rem;
  letter-spacing: 0.42em;
  color: var(--champagne);
  margin-bottom: 1.6rem;
}
.bench-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--champagne);
  box-shadow: 0 0 8px rgba(200, 169, 106, 0.8);
}
@media (prefers-reduced-motion: no-preference) {
  .bench-dot { animation: bench-pulse 2.4s ease-in-out infinite; }
  @keyframes bench-pulse {
    0%, 100% { opacity: 0.35; }
    50% { opacity: 1; }
  }
}

.dial { margin-bottom: 1.45rem; }
.dial-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.7rem;
}
.dial-head label {
  font-size: 0.62rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--smoke);
}
.dial-head output {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--champagne);
  font-variant-numeric: tabular-nums;
}

.bench input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 22px;
  background: transparent;
  cursor: pointer;
  display: block;
}
.bench input[type="range"]:focus-visible { outline: 1px solid rgba(200, 169, 106, 0.6); outline-offset: 4px; }
.bench input[type="range"]::-webkit-slider-runnable-track {
  height: 1px;
  background: linear-gradient(90deg, var(--deep-gold), rgba(232, 230, 225, 0.16));
}
.bench input[type="range"]::-moz-range-track {
  height: 1px;
  background: linear-gradient(90deg, var(--deep-gold), rgba(232, 230, 225, 0.16));
}
.bench input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  margin-top: -6px;
  background: var(--obsidian);
  border: 1px solid var(--champagne);
  box-shadow: 0 0 0 3px rgba(8, 8, 11, 0.9), 0 0 14px rgba(200, 169, 106, 0.35);
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1), background 0.25s ease;
}
.bench input[type="range"]::-moz-range-thumb {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--obsidian);
  border: 1px solid var(--champagne);
  box-shadow: 0 0 0 3px rgba(8, 8, 11, 0.9), 0 0 14px rgba(200, 169, 106, 0.35);
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1), background 0.25s ease;
}
.bench input[type="range"]:hover::-webkit-slider-thumb,
.bench input[type="range"]:active::-webkit-slider-thumb {
  transform: scale(1.35);
  background: var(--champagne);
}
.bench input[type="range"]:hover::-moz-range-thumb,
.bench input[type="range"]:active::-moz-range-thumb {
  transform: scale(1.35);
  background: var(--champagne);
}

.hallmark {
  margin-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.8rem;
  border-top: 1px solid rgba(232, 230, 225, 0.09);
  padding-top: 1.1rem;
}
.hallmark-label {
  font-size: 0.56rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--smoke);
}
.hallmark code {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.64rem;
  letter-spacing: 0.12em;
  color: rgba(200, 169, 106, 0.85);
  white-space: nowrap;
}

.bench-foot {
  margin-top: 1.1rem;
  padding-top: 1.1rem;
  border-top: 1px solid rgba(232, 230, 225, 0.09);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
}
.presets { display: flex; gap: 0.45rem; flex-wrap: wrap; }
.chip {
  font-family: var(--body);
  font-size: 0.58rem;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--smoke);
  background: transparent;
  border: 1px solid rgba(232, 230, 225, 0.16);
  border-radius: 2em;
  padding: 0.5em 1em;
  cursor: pointer;
  transition: color 0.3s ease, border-color 0.3s ease, background 0.3s ease, transform 0.2s ease;
}
.chip:hover { color: var(--porcelain); border-color: rgba(200, 169, 106, 0.6); }
.chip:active { transform: scale(0.94); }
.chip.is-on { color: var(--obsidian); background: var(--champagne); border-color: var(--champagne); }
.chip.reset { color: var(--champagne); border-color: rgba(200, 169, 106, 0.4); }
.chip.reset:hover { background: var(--champagne); color: var(--obsidian); }

/* ---------- materials ---------- */

.material { min-height: 100vh; padding-top: 12vh; padding-bottom: 12vh; align-items: flex-start; }
.material-inner { width: 100%; max-width: 68rem; margin: 0 auto; }
.material-head { max-width: 34rem; margin-bottom: 3.4rem; }
.lead { font-size: 0.95rem; }

.mat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.2rem, 3vw, 2.4rem);
  align-items: stretch;
}
.mat-card {
  pointer-events: auto;
  background: rgba(10, 10, 14, 0.55);
  border: 1px solid rgba(232, 230, 225, 0.1);
  border-radius: 0.4rem;
  padding: clamp(1.6rem, 3vw, 2.4rem);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: border-color 0.5s ease, transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
.mat-card:hover { border-color: rgba(200, 169, 106, 0.35); transform: translateY(-4px); }
.mat-card h3 {
  font-family: var(--display);
  font-weight: 400;
  font-size: 1.55rem;
  letter-spacing: 0.03em;
  margin-bottom: 1rem;
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
}
.mat-num {
  font-size: 0.7rem;
  font-family: var(--body);
  letter-spacing: 0.2em;
  color: var(--champagne);
  border: 1px solid rgba(200, 169, 106, 0.45);
  border-radius: 50%;
  width: 1.7rem;
  height: 1.7rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
  transform: translateY(-0.2em);
}
.mat-body { color: var(--smoke); font-size: 0.86rem; line-height: 1.9; }
.mat-body em { font-style: normal; color: var(--champagne); }

.meters { list-style: none; margin: 1.7rem 0 0; }
.meters li {
  display: grid;
  grid-template-columns: 7.2rem 1fr 2.4rem;
  align-items: center;
  gap: 0.9rem;
  padding: 0.55rem 0;
  border-top: 1px solid rgba(232, 230, 225, 0.07);
}
.m-label {
  font-size: 0.58rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--smoke);
}
.m-track { height: 1px; background: rgba(232, 230, 225, 0.12); overflow: hidden; }
.m-fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--deep-gold), var(--champagne));
  transform: scaleX(0);
  transform-origin: left;
}
.m-val {
  font-size: 0.72rem;
  color: var(--champagne);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.swatches { list-style: none; margin-top: 1.6rem; }
.swatches li {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 0.78rem;
  color: var(--smoke);
  padding: 0.5rem 0;
}
.swatches strong { color: var(--porcelain); font-weight: 400; }
.dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  flex: none;
  box-shadow: inset -2px -2px 4px rgba(0, 0, 0, 0.6), inset 2px 2px 3px rgba(255, 255, 255, 0.14);
}
.dot-base { background: radial-gradient(circle at 32% 30%, #2a2a33, #101014 65%); }
.dot-coat { background: radial-gradient(circle at 32% 28%, rgba(255,255,255,0.85), rgba(200,210,235,0.18) 38%, rgba(16,16,20,0.9) 72%); }
.dot-rim { background: radial-gradient(circle at 32% 30%, #e8cf9a, var(--champagne) 55%, var(--deep-gold)); }

.studio-fig { margin-top: 1.7rem; }
.studio { width: 100%; height: auto; display: block; }
.studio text {
  font-family: var(--body);
  font-size: 8px;
  letter-spacing: 0.24em;
  fill: var(--smoke);
  text-anchor: middle;
}
.studio .rays line { opacity: 0.10; transition: opacity 0.4s ease; }
.studio .lamp { cursor: pointer; outline: none; }
.studio .lamp:focus-visible rect { filter: drop-shadow(0 0 8px rgba(200, 169, 106, 0.9)); }
.studio .lamp.is-off rect { opacity: 0.18; filter: none; }
.studio .lamp.is-off ellipse { opacity: 0 !important; animation: none !important; }
.studio .lamp.is-off text { fill: rgba(139, 139, 150, 0.4); text-decoration: line-through; }
.studio .lamp.is-off:hover rect { opacity: 0.35; filter: none; }
.studio .lamp rect { transition: filter 0.4s ease, opacity 0.4s ease; }
.studio .lamp ellipse { opacity: 0.4; transition: opacity 0.4s ease; }
.studio .lamp text { transition: fill 0.4s ease; }
.studio .lamp:hover ellipse { opacity: 1; }
.studio .lamp:hover text { fill: var(--champagne); }
.studio .lamp:hover rect { filter: drop-shadow(0 0 6px rgba(223, 230, 255, 0.9)); }
.studio .lamp-warm:hover rect { filter: drop-shadow(0 0 6px rgba(255, 199, 110, 0.9)); }
@media (prefers-reduced-motion: no-preference) {
  .studio .lamp ellipse { animation: lamp-breathe 6s ease-in-out infinite; }
  .studio .lamp-l ellipse { animation-delay: 1.2s; }
  .studio .lamp-r ellipse { animation-delay: 2.4s; }
  .studio .lamp-rim rect { animation: lamp-breathe 6s ease-in-out infinite 3.6s; }
  .studio .lamp-warm ellipse { animation-delay: 4.8s; }
  @keyframes lamp-breathe {
    0%, 100% { opacity: 0.35; }
    50% { opacity: 0.9; }
  }
}
.studio-fig figcaption {
  margin-top: 0.9rem;
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: rgba(139, 139, 150, 0.75);
  line-height: 1.8;
}
.studio-fig figcaption strong { color: var(--champagne); font-weight: 400; }
.bloom-mark circle:first-child { stroke-dasharray: 3 3; }
@media (prefers-reduced-motion: no-preference) {
  .bloom-mark { transform-origin: 170px 140px; animation: mark-spin 26s linear infinite; }
  @keyframes mark-spin { to { transform: rotate(360deg); } }
}

/* ---------- process timeline ---------- */

.process { min-height: 100vh; padding-top: 12vh; padding-bottom: 14vh; flex-direction: column; justify-content: center; }
.process-inner { width: 100%; max-width: 68rem; margin: 0 auto; }
.process .lead { max-width: 30rem; margin-bottom: 3.6rem; }

.tl { position: relative; pointer-events: auto; }
.tl-line {
  position: absolute;
  top: 5px;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(232, 230, 225, 0.1);
  overflow: hidden;
}
#tlFill {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--deep-gold), var(--champagne));
  transform: scaleX(0);
  transform-origin: left;
}
.tl-steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(1.2rem, 3vw, 2.6rem);
}
.tl-steps li { position: relative; padding-top: 2.2rem; }
.tl-node {
  position: absolute;
  top: 0;
  left: 0;
  width: 11px;
  height: 11px;
  border: 1px solid var(--champagne);
  background: var(--obsidian);
  transform: rotate(45deg);
  transition: background 0.4s ease, box-shadow 0.4s ease;
}
.tl-steps li:hover .tl-node {
  background: var(--champagne);
  box-shadow: 0 0 16px rgba(200, 169, 106, 0.55);
}
.tl-idx {
  font-size: 0.6rem;
  letter-spacing: 0.34em;
  color: var(--champagne);
  display: block;
  margin-bottom: 0.7rem;
}
.tl-steps h3 {
  font-family: var(--display);
  font-weight: 400;
  font-size: 1.45rem;
  margin-bottom: 0.7rem;
  color: var(--porcelain);
}
.tl-steps p {
  font-size: 0.8rem;
  line-height: 1.85;
  color: var(--smoke);
  margin-bottom: 1rem;
}
.tl-steps code {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--champagne);
  background: rgba(200, 169, 106, 0.07);
  border: 1px solid rgba(200, 169, 106, 0.18);
  padding: 0.35em 0.8em;
  border-radius: 2px;
  display: inline-block;
}

/* ---------- footer ---------- */

.site-footer {
  position: relative;
  z-index: 10;
  pointer-events: auto;
  padding: clamp(3rem, 7vh, 5rem) clamp(1.4rem, 6vw, 6rem) 2.6rem;
  background: linear-gradient(transparent, rgba(5, 5, 8, 0.9) 40%);
}
.foot-inner { max-width: 68rem; margin: 0 auto; }
.foot-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.4rem;
}
.foot-mark { font-size: 1.1rem; }
.foot-nav { display: flex; gap: clamp(1rem, 2.6vw, 2.2rem); flex-wrap: wrap; }
.foot-nav a {
  font-size: 0.62rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--smoke);
  text-decoration: none;
  transition: color 0.35s ease;
}
.foot-nav a:hover { color: var(--champagne); }
.foot-rule {
  height: 1px;
  margin: 2.2rem 0 1.8rem;
  background: linear-gradient(90deg, rgba(200, 169, 106, 0.35), rgba(232, 230, 225, 0.07));
}
.foot-bottom {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.8rem;
}
.foot-bottom p { font-size: 0.7rem; letter-spacing: 0.14em; color: var(--smoke); line-height: 2; }
.foot-fine { color: rgba(139, 139, 150, 0.6); }

/* ---------- responsive ---------- */

@media (max-width: 980px) {
  .atelier-inner { grid-template-columns: 1fr; gap: 2.4rem; max-width: 30rem; }
  .atelier { padding-top: 15vh; padding-bottom: 10vh; align-items: flex-start; }
  .atelier-copy { max-width: 30rem; }
  .mat-grid { grid-template-columns: 1fr; }
  .tl-steps { grid-template-columns: 1fr 1fr; row-gap: 3rem; }
  .tl-line { display: none; }
}

@media (max-width: 820px) {
  .sec { padding: 0 clamp(1.3rem, 6vw, 2.4rem); }
  .right, .left { justify-content: center; }
  .block { max-width: 30rem; text-align: left; }
  .right .block { text-align: left; }
  .right .num::after { margin-left: 0; }
  .spec { grid-template-columns: repeat(2, 1fr); }
  .hud-track { width: 70px; }
  h1 { font-size: clamp(3.4rem, 17vw, 6rem); }
  .topnav .anchor { display: none; }
  .material, .process { padding-top: 14vh; }
}

@media (max-width: 560px) {
  .tl-steps { grid-template-columns: 1fr; row-gap: 2.6rem; }
  .tl-steps li { padding-top: 0; padding-left: 2rem; }
  .tl-node { top: 0.35rem; }
  .bench { padding: 1.5rem 1.3rem 1.3rem; }
  .bench-foot { flex-direction: column; align-items: flex-start; }
  .foot-top { flex-direction: column; align-items: flex-start; }
  .foot-bottom { flex-direction: column; }
}

@media (max-width: 480px) {
  .spec { grid-template-columns: 1fr 1fr; gap: 1.4rem 1.4rem; }
  .wordmark { letter-spacing: 0.28em; font-size: 0.82rem; }
  .sub { font-size: 0.88rem; }
}