/* PCB.css — M PRO9 PCB Design & Electronics — Copper & Warmth */

/* ═══════════════════════════════════════════════
   DESIGN TOKENS
═══════════════════════════════════════════════ */
:root {
  --pcb-bg:           #0c1220;
  --pcb-surface:      #0f1a2e;
  --pcb-surface-2:    #112038;
  --pcb-copper:       #c07018;
  --pcb-copper-dim:   #7a4e18;
  --pcb-copper-glow:  #d98c22;
  --pcb-text:         #e8eef8;
  --pcb-muted:        #6888a8;
  --pcb-faint:        #1e3050;
  --pcb-rule:         #1c2e48;
  --pcb-mask-green:   #1a3d1c;
  --pcb-fr4-color:    #2a3218;
  --pcb-silk-bg:      #d8ceba;
}

/* ═══════════════════════════════════════════════
   PAGE BASE
═══════════════════════════════════════════════ */
body {
  background: var(--pcb-bg);
  color: var(--pcb-text);
}

#navbar-placeholder,
#footer-placeholder {
  position: relative;
  z-index: 10;
}

main {
  position: relative;
  z-index: 1;
}

/* ═══════════════════════════════════════════════
   SHARED UTILITIES
═══════════════════════════════════════════════ */
.pcb-section-label {
  display: inline-block;
  font-family: 'Inter', sans-serif;
  font-size: 0.70rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--pcb-copper);
  margin-bottom: 1rem;
}

.pcb-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: 6px;
  font-family: 'Inter', sans-serif;
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.22s ease, color 0.22s ease, box-shadow 0.22s ease, transform 0.18s ease;
  cursor: pointer;
  border: none;
}

.pcb-btn-primary {
  background: var(--pcb-copper);
  color: #0e0a04;
}
.pcb-btn-primary:hover {
  background: var(--pcb-copper-glow);
  box-shadow: 0 0 28px rgba(192,112,24,0.35);
  transform: translateY(-2px);
}

.pcb-btn-ghost {
  background: transparent;
  color: var(--pcb-text);
  border: 1.5px solid var(--pcb-faint);
}
.pcb-btn-ghost:hover {
  border-color: var(--pcb-copper-dim);
  color: var(--pcb-copper);
  transform: translateY(-2px);
}

/* ═══════════════════════════════════════════════
   HERO
═══════════════════════════════════════════════ */
.pcb-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--pcb-bg);
}

#pcb-trace-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.pcb-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  width: 100%;
  max-width: 1340px;
  margin: 0 auto;
  padding: 6rem 3rem 5rem;
}

/* eyebrow */
.pcb-eyebrow {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--pcb-copper);
  margin-bottom: 1.6rem;
  opacity: 0;
}

.pcb-eye-tick {
  display: inline-block;
  width: 18px;
  height: 1.5px;
  background: var(--pcb-copper);
  flex-shrink: 0;
}

/* char-split spans (injected by pcb-gsap.js) */
.pcb-char {
  display: inline-block;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

/* headline */
.pcb-h1 {
  display: flex;
  flex-direction: column;
  font-family: 'Lato', sans-serif;
  font-size: clamp(2.8rem, 5vw, 4.4rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--pcb-text);
  margin: 0 0 1.6rem;
}

.pcb-hw {
  display: block;
  opacity: 0;
  transform: translateY(30px);
}

/* sub */
.pcb-hero-sub {
  font-family: 'Inter', sans-serif;
  font-size: 1.02rem;
  line-height: 1.68;
  color: var(--pcb-muted);
  max-width: 52ch;
  margin-bottom: 2.2rem;
  opacity: 0;
}

/* buttons */
.pcb-hero-btns {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.4rem;
  opacity: 0;
}

/* tags */
.pcb-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  opacity: 0;
}

.pcb-hero-tags span {
  font-family: 'Inter', sans-serif;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--pcb-copper-dim);
  background: rgba(107,63,13,0.15);
  border: 1px solid rgba(107,63,13,0.3);
  padding: 0.28rem 0.8rem;
  border-radius: 3px;
}

/* 3D model col */
.pcb-hero-model-col {
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
}

.pcb-model-frame {
  position: relative;
  width: 100%;
  max-width: 540px;
  aspect-ratio: 4 / 3;
  background: rgba(12,18,32,0.6);
  border: 1px solid var(--pcb-faint);
}

/* Registration marks (PCB corners) */
.pcb-reg {
  position: absolute;
  width: 16px;
  height: 16px;
  pointer-events: none;
}
.pcb-reg::before,
.pcb-reg::after {
  content: '';
  position: absolute;
  background: var(--pcb-copper-dim);
}
.pcb-reg::before { width: 100%; height: 1px; top: 0; left: 0; }
.pcb-reg::after  { width: 1px; height: 100%; top: 0; left: 0; }

.pcb-reg-tl { top: 0; left: 0; }
.pcb-reg-tr { top: 0; right: 0; transform: rotate(90deg); }
.pcb-reg-bl { bottom: 0; left: 0; transform: rotate(-90deg); }
.pcb-reg-br { bottom: 0; right: 0; transform: rotate(180deg); }

#pcb-hero-glb {
  width: 100%;
  height: 100%;
  display: block;
}

/* load bar */
#pcb-hero-load,
#pcb-cam-load {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
}

.pcb-load-track {
  width: 80px;
  height: 2px;
  background: rgba(107,63,13,0.3);
  border-radius: 2px;
  overflow: hidden;
}

.pcb-load-track div {
  height: 100%;
  width: 0%;
  background: var(--pcb-copper);
  border-radius: 2px;
  box-shadow: 0 0 6px rgba(192,112,24,0.6);
  transition: width 0.2s ease;
}

/* HUD */
.pcb-model-hud {
  position: absolute;
  top: 14px;
  left: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.pcb-hud-name {
  font-family: 'Inter', monospace;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--pcb-copper);
}

.pcb-hud-sub {
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: 'Inter', monospace;
  font-size: 0.60rem;
  letter-spacing: 0.08em;
  color: var(--pcb-muted);
}

.pcb-hud-dot {
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--pcb-copper);
  box-shadow: 0 0 6px var(--pcb-copper);
  animation: pcb-pulse-dot 2s ease-in-out infinite;
}

@keyframes pcb-pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.55; transform: scale(0.75); }
}

/* ═══════════════════════════════════════════════
   SERVICES — annotation rows
═══════════════════════════════════════════════ */
.pcb-services {
  padding: 7rem 3rem;
  max-width: 1340px;
  margin: 0 auto;
}

.pcb-svc-intro {
  margin-bottom: 4rem;
}

.pcb-svc-intro h2 {
  font-family: 'Lato', sans-serif;
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--pcb-text);
  margin: 0;
}

.pcb-svc-list {
  display: flex;
  flex-direction: column;
}

.pcb-svc-row {
  display: grid;
  grid-template-columns: 80px 1fr 172px;
  gap: 2.5rem;
  align-items: center;
  padding: 2.4rem 0;
  border-top: 1px solid var(--pcb-rule);
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateX(28px);
}

.pcb-svc-row:last-child {
  border-bottom: 1px solid var(--pcb-rule);
}

/* hover copper wash */
.pcb-svc-row::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(192,112,24,0.04));
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
}
.pcb-svc-row:hover::after,
.pcb-svc-row.is-touched::after,
.pcb-svc-row:focus-within::after { opacity: 1; }

.pcb-svc-left {
  padding-top: 0.4rem;
}

.pcb-svc-num {
  font-family: 'Inter', monospace;
  font-size: 0.70rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--pcb-copper-dim);
}

.pcb-svc-body h3 {
  font-family: 'Lato', sans-serif;
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--pcb-text);
  margin: 0 0 0.7rem;
}

.pcb-svc-body p {
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  line-height: 1.68;
  color: var(--pcb-muted);
  max-width: 58ch;
  margin: 0;
}

/* Spec right column */
.pcb-svc-spec {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.65rem;
}

.pcb-svc-spec-icon {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  border: 1px solid rgba(192,112,24,0.32);
  background: rgba(192,112,24,0.07);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--pcb-copper);
  font-size: 1.18rem;
  box-shadow: 0 0 0 0 rgba(192,112,24,0);
  transition: box-shadow 0.4s ease, border-color 0.4s ease;
  flex-shrink: 0;
}
.pcb-svc-row:hover .pcb-svc-spec-icon,
.pcb-svc-row.is-touched .pcb-svc-spec-icon,
.pcb-svc-row:focus-within .pcb-svc-spec-icon {
  border-color: rgba(192,112,24,0.65);
  box-shadow: 0 0 18px rgba(192,112,24,0.22);
}

.pcb-svc-spec-stat {
  font-family: 'Inter', monospace;
  font-size: 0.67rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pcb-muted);
}

.pcb-svc-tag {
  font-family: 'Inter', monospace;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--pcb-copper-dim);
  background: rgba(107,63,13,0.12);
  border: 1px solid rgba(107,63,13,0.28);
  padding: 0.35rem 0.8rem;
  border-radius: 3px;
  white-space: nowrap;
}

/* Services — intro line-mask reveal */
.pcb-svc-intro-line {
  display: block;
  overflow: hidden;
}
.pcb-svc-intro-line-inner {
  display: block;
  line-height: 1.18;
}

/* Services — trace draw & scan sweep injected via JS */
.pcb-svc-trace {
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--pcb-copper-glow) 0%, var(--pcb-copper) 40%, var(--pcb-copper-dim) 75%, transparent 100%);
  transform-origin: left center;
  transform: scaleX(0);
  pointer-events: none;
  z-index: 2;
  box-shadow: 0 0 8px rgba(192,112,24,0.45);
}

.pcb-svc-scan {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(192,112,24,0.06) 50%, transparent 100%);
  pointer-events: none;
  z-index: 1;
  will-change: transform;
}

/* Number — bigger base size for scale-in effect */
.pcb-svc-num {
  will-change: transform, opacity, filter;
  transform-origin: left center;
}

/* ═══════════════════════════════════════════════
   PCB LAYER STACK
═══════════════════════════════════════════════ */
.pcb-layers {
  background: var(--pcb-surface);
  padding: 7rem 3rem;
  overflow: hidden;
}

.pcb-layers-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  max-width: 1340px;
  margin: 0 auto;
}

.pcb-layers-text h2 {
  font-family: 'Lato', sans-serif;
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--pcb-text);
  margin: 0 0 1.2rem;
}

.pcb-layers-sub {
  font-family: 'Inter', sans-serif;
  font-size: 0.97rem;
  line-height: 1.68;
  color: var(--pcb-muted);
  max-width: 48ch;
  margin: 0 0 2.4rem;
}

.pcb-layers-legend {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.pcb-layers-legend li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  color: var(--pcb-muted);
}

.pcb-leg-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  flex-shrink: 0;
}
.pcb-leg-silk { background: var(--pcb-silk-bg); }
.pcb-leg-mask { background: #1e6b20; }
.pcb-leg-cu   { background: #c07018; }
.pcb-leg-fr4  { background: #2a3218; border: 1px solid #3a4228; }
.pcb-leg-gnd  { background: #8a5010; }

/* 3D stack */
.pcb-stack-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
}

.pcb-stack-scene {
  perspective: 1100px;
  perspective-origin: 52% 48%;
}

.pcb-stack-inner {
  position: relative;
  width: 420px;
  height: 240px;
  transform: rotateX(-14deg) rotateY(-28deg);
  transform-style: preserve-3d;
}

.pcb-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 420px;
  height: 240px;
  transform-style: preserve-3d;
  /* translateZ animated by GSAP */
}

.pcb-layer-face {
  width: 100%;
  height: 100%;
  position: relative;
  border-radius: 3px;
  overflow: hidden;
  /* right edge depth illusion */
  box-shadow:
    6px 6px 0 rgba(0,0,0,0.45),
    8px 8px 0 rgba(0,0,0,0.22);
}

/* right/bottom "thickness" edge */
.pcb-layer-face::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid rgba(0,0,0,0.35);
  border-radius: 3px;
  pointer-events: none;
}

.pcb-layer-silk   .pcb-layer-face { background: var(--pcb-silk-bg); }
.pcb-layer-mask   .pcb-layer-face { background: rgba(22,85,24,0.82); }
.pcb-layer-copper .pcb-layer-face { background: #0e1828; }
.pcb-layer-fr4    .pcb-layer-face { background: var(--pcb-fr4-color); }
.pcb-layer-gnd    .pcb-layer-face { background: #0e1828; }

.pcb-layer-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.pcb-layer-label {
  position: absolute;
  bottom: 8px;
  right: 10px;
  font-family: 'Inter', monospace;
  font-size: 0.60rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  pointer-events: none;
}

.pcb-layer-silk   .pcb-layer-label { color: rgba(0,0,0,0.4); }
.pcb-layer-mask   .pcb-layer-label { color: rgba(255,255,255,0.45); }
.pcb-layer-copper .pcb-layer-label { color: rgba(192,112,24,0.65); }
.pcb-layer-fr4    .pcb-layer-label { color: rgba(180,200,160,0.55); }
.pcb-layer-gnd    .pcb-layer-label { color: rgba(192,112,24,0.60); }

/* ═══════════════════════════════════════════════
   3D SHOWCASE
═══════════════════════════════════════════════ */
.pcb-showcase {
  padding: 7rem 3rem;
  max-width: 1340px;
  margin: 0 auto;
}

.pcb-showcase-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.pcb-showcase-frame {
  position: relative;
  aspect-ratio: 1;
  background: var(--pcb-surface);
  border: 1px solid var(--pcb-faint);
  border-radius: 8px;
  overflow: hidden;
}

#pcb-cam-glb {
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
}

#pcb-cam-glb:active { cursor: grabbing; }

.pcb-showcase-hint {
  position: absolute;
  bottom: 14px;
  right: 14px;
  font-family: 'Inter', sans-serif;
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--pcb-muted);
  display: flex;
  align-items: center;
  gap: 5px;
  opacity: 0.7;
}

.pcb-showcase-info h2 {
  font-family: 'Lato', sans-serif;
  font-size: clamp(2rem, 3.2vw, 2.8rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--pcb-text);
  margin: 0 0 1rem;
}

.pcb-showcase-desc {
  font-family: 'Inter', sans-serif;
  font-size: 0.97rem;
  line-height: 1.7;
  color: var(--pcb-muted);
  max-width: 50ch;
  margin: 0 0 2rem;
}

.pcb-spec-table {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 0 0 2.2rem;
  max-width: 380px;
}

.pcb-spec-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1rem;
  padding: 0.7rem 0;
  border-top: 1px solid var(--pcb-rule);
}

.pcb-spec-row:last-child {
  border-bottom: 1px solid var(--pcb-rule);
}

.pcb-spec-row dt {
  font-family: 'Inter', monospace;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pcb-copper-dim);
}

.pcb-spec-row dd {
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  color: var(--pcb-text);
  margin: 0;
}

.pcb-showcase-cta {
  display: inline-flex;
}

/* ═══════════════════════════════════════════════
   PROCESS — trace timeline
═══════════════════════════════════════════════ */
.pcb-process {
  background: var(--pcb-surface);
  padding: 7rem 3rem;
}

.pcb-proc-intro {
  text-align: center;
  max-width: 560px;
  margin: 0 auto 5rem;
}

.pcb-proc-intro h2 {
  font-family: 'Lato', sans-serif;
  font-size: clamp(2rem, 3.5vw, 2.9rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--pcb-text);
  margin: 0 0 0.8rem;
}

.pcb-proc-sub {
  font-family: 'Inter', monospace;
  font-size: 0.80rem;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--pcb-copper-dim);
  margin: 0;
}

.pcb-proc-track {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
}

.pcb-proc-rail {
  position: absolute;
  top: 18px;
  left: 0;
  right: 0;
  width: 100%;
  height: 12px;
  overflow: visible;
}

.pcb-proc-nodes {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  padding-top: 0;
}

.pcb-proc-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.6rem;
  opacity: 0;
  transform: translateY(18px);
}

.pcb-proc-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--pcb-bg);
  border: 2px solid var(--pcb-copper-dim);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  margin-bottom: 1rem;
}

.pcb-proc-node.active .pcb-proc-dot {
  background: var(--pcb-copper);
  border-color: var(--pcb-copper-glow);
  box-shadow: 0 0 16px rgba(192,112,24,0.5);
}

.pcb-proc-step {
  font-family: 'Inter', monospace;
  font-size: 0.60rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--pcb-copper-dim);
}

.pcb-proc-name {
  font-family: 'Lato', sans-serif;
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--pcb-text);
}

.pcb-proc-desc {
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--pcb-muted);
  max-width: 120px;
}

/* ═══════════════════════════════════════════════
   TOOLS & STANDARDS STRIP
═══════════════════════════════════════════════ */
.pcb-tools {
  border-top: 1px solid var(--pcb-rule);
  border-bottom: 1px solid var(--pcb-rule);
  padding: 4rem 3rem;
  max-width: 1340px;
  margin: 0 auto;
}

.pcb-tools-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.pcb-tool-item {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.75rem 1.5rem;
  border: 1px solid var(--pcb-faint);
  border-radius: 8px;
  background: var(--pcb-surface);
  transition: border-color 0.32s ease, background 0.32s ease, transform 0.32s ease;
  opacity: 0;
  transform: translateY(18px);
  cursor: default;
}

.pcb-tool-item:hover {
  border-color: rgba(192,112,24,0.35);
  background: var(--pcb-surface-2);
  transform: translateY(-2px);
}

.pcb-tool-icon {
  font-size: 1.3rem;
  color: var(--pcb-copper);
  margin-bottom: 0.25rem;
  display: block;
  transition: color 0.28s ease;
}
.pcb-tool-item:hover .pcb-tool-icon {
  color: var(--pcb-copper-glow);
}

.pcb-tool-name {
  font-family: 'Lato', sans-serif;
  font-size: 1.0rem;
  font-weight: 800;
  color: var(--pcb-text);
  display: block;
}

.pcb-tool-desc {
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--pcb-muted);
  display: block;
}

/* ═══════════════════════════════════════════════
   CTA
═══════════════════════════════════════════════ */
.pcb-cta {
  background: var(--pcb-surface);
  padding: 7rem 3rem;
  position: relative;
  overflow: hidden;
}

.pcb-cta-inner {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.pcb-cta-label {
  display: block;
  text-align: center;
}

.pcb-cta-heading {
  font-family: 'Lato', sans-serif;
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--pcb-text);
  margin: 0 0 1.2rem;
}

.pcb-cta-sub {
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--pcb-muted);
  max-width: 48ch;
  margin: 0 auto 2.4rem;
}

.pcb-cta-btns {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.pcb-cta-deco {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 220px;
  height: 220px;
  opacity: 0.6;
  pointer-events: none;
}

.pcb-cta-deco svg {
  width: 100%;
  height: 100%;
}

/* ═══════════════════════════════════════════════
   FLOATING GET QUOTE BUTTON
═══════════════════════════════════════════════ */
.pcb-float-btn {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  z-index: 9000;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.82rem 1.35rem;
  background: var(--pcb-copper);
  color: #080608;
  font-family: 'Inter', sans-serif;
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  border-radius: 50px;
  box-shadow: 0 4px 28px rgba(192,112,24,0.38);
  transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease;
  animation: pcb-float-pulse 3.2s ease-in-out infinite;
  will-change: transform;
}

.pcb-float-btn i { font-size: 0.92rem; }

.pcb-float-btn:hover {
  background: var(--pcb-copper-glow);
  transform: translateY(-4px) scale(1.04);
  box-shadow: 0 8px 36px rgba(192,112,24,0.55);
  animation-play-state: paused;
}

@keyframes pcb-float-pulse {
  0%, 100% {
    box-shadow: 0 4px 28px rgba(192,112,24,0.38), 0 0 0 0 rgba(192,112,24,0.45);
  }
  55% {
    box-shadow: 0 4px 28px rgba(192,112,24,0.38), 0 0 0 14px rgba(192,112,24,0);
  }
}

/* ═══════════════════════════════════════════════
   PROCESS — ICON BADGES (injected by pcb-gsap.js)
═══════════════════════════════════════════════ */
.pcb-proc-icon-badge {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(192,112,24,0.07);
  border: 1px solid rgba(192,112,24,0.14);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  color: var(--pcb-copper-dim);
  margin-bottom: 0.65rem;
  transition: background 0.4s ease, border-color 0.4s ease, color 0.4s ease, box-shadow 0.4s ease;
}

.pcb-proc-node.active .pcb-proc-icon-badge {
  background: rgba(192,112,24,0.15);
  border-color: rgba(192,112,24,0.42);
  color: var(--pcb-copper);
  box-shadow: 0 0 22px rgba(192,112,24,0.30);
}

/* ═══════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════ */
@media (max-width: 1100px) {
  .pcb-hero-inner {
    grid-template-columns: 1fr;
    padding: 5rem 2rem 4rem;
    gap: 2rem;
  }
  /* Hero model — visible on tablet, smaller max-width; JS resize dispatch recalibrates renderer */
  .pcb-hero-model-col {
    display: flex;
    max-width: 440px;
    width: 100%;
    margin: 0 auto;
  }
  .pcb-h1 { font-size: clamp(2.4rem, 8vw, 3.6rem); }

  .pcb-layers-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .pcb-stack-wrap { order: -1; }
  .pcb-stack-scene { transform: scale(0.82); }

  .pcb-showcase-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 900px) {
  .pcb-services,
  .pcb-layers,
  .pcb-showcase,
  .pcb-process,
  .pcb-caps,
  .pcb-cta {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  .pcb-svc-row {
    grid-template-columns: 56px 1fr;
    gap: 1.5rem;
  }
  .pcb-svc-spec { display: none; }

  .pcb-caps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pcb-cap-item:nth-child(3n) { padding-left: 0; }
  .pcb-cap-item:nth-child(3n+2) { padding-left: 0; padding-right: 0; }
  .pcb-cap-item:nth-child(2n+1) { border-right: 1px solid var(--pcb-rule); padding-right: 2rem; }
  .pcb-cap-item:nth-child(2n)   { padding-left: 2rem; border-right: none; }
  .pcb-cap-item:nth-child(5),
  .pcb-cap-item:nth-child(6) { border-bottom: 1px solid var(--pcb-rule); }
  .pcb-cap-item:nth-child(3) { border-right: none; border-bottom: 1px solid var(--pcb-rule); }
}

@media (max-width: 680px) {
  .pcb-proc-nodes {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
  .pcb-proc-rail { display: none; }

  /* Mobile stage order: Number -> Icon -> Heading -> Description. The dot
     is a desktop-only rail marker with no meaning once the rail itself is
     hidden above, so it's removed entirely rather than just hidden — its
     gap-based spacing (from .pcb-proc-node's flex gap) disappears with it,
     no manual gap fix needed. .pcb-proc-icon-badge is injected by
     pcb-gsap.js as node.firstChild; reordered here via flex `order`,
     no HTML change. */
  .pcb-proc-dot { display: none; }
  .pcb-proc-step {
    order: 1;
    font-size: 1.35rem;
  }
  .pcb-proc-icon-badge { order: 2; }
  .pcb-proc-name       { order: 3; }
  .pcb-proc-desc        { order: 4; }

  .pcb-tools-inner {
    grid-template-columns: 1fr 1fr;
  }

  .pcb-stack-inner {
    width: 300px;
    height: 170px;
  }
  .pcb-layer {
    width: 300px;
    height: 170px;
  }
}

@media (max-width: 480px) {
  .pcb-proc-nodes {
    grid-template-columns: repeat(2, 1fr);
  }
  .pcb-tools-inner {
    grid-template-columns: 1fr;
  }
  .pcb-cap-item { border-right: none !important; padding-left: 0 !important; padding-right: 0 !important; }
  .pcb-cap-item:nth-child(n) { border-bottom: 1px solid var(--pcb-rule); }
  .pcb-cap-item:nth-child(6) { border-bottom: none; }
}

/* ═══════════════════════════════════════════════
   COMPREHENSIVE RESPONSIVE — PREMIUM MOBILE PARITY
   Breakpoints: 1280 · 1024 · 768 · 680-ext · 560 · 480-ext · 430 · 390 · 360
   Goal: 390px must feel as premium as 1440px
═══════════════════════════════════════════════ */

/* ── Universal: enforce 44px minimum touch target on all buttons ── */
.pcb-btn {
  min-height: 44px;
}

/* ── 1280px: Wide laptop — tighten hero padding slightly ── */
@media (max-width: 1280px) {
  .pcb-hero-inner {
    padding: 6rem 2.5rem 5rem;
  }
}

/* ── 1024px: Small laptop / large tablet landscape ── */
@media (max-width: 1024px) {
  .pcb-hero-inner {
    padding: 5rem 2rem 4rem;
  }
  .pcb-services  { padding-left: 2rem; padding-right: 2rem; }
  .pcb-layers    { padding-left: 2rem; padding-right: 2rem; }
  .pcb-showcase  { padding-left: 2rem; padding-right: 2rem; }
  .pcb-process   { padding-left: 2rem; padding-right: 2rem; }
  .pcb-tools     { padding-left: 2rem; padding-right: 2rem; }
  .pcb-cta       { padding-left: 2rem; padding-right: 2rem; }
}

/* ── 768px: Tablet portrait — first vertical padding reduction ── */
@media (max-width: 768px) {
  /* svh accounts for mobile browser toolbars stealing viewport height */
  .pcb-hero {
    min-height: 100svh;
  }
  .pcb-hero-inner {
    padding: 4.5rem 1.5rem 3.5rem;
    gap: 1.5rem;
  }
  .pcb-h1 {
    font-size: clamp(2.2rem, 7vw, 3.2rem);
  }
  .pcb-hero-sub {
    font-size: 0.97rem;
    max-width: 100%;
    margin-bottom: 2rem;
  }
  .pcb-hero-btns {
    margin-bottom: 2rem;
  }
  .pcb-hero-model-col {
    max-width: 400px;
  }
  .pcb-services,
  .pcb-layers,
  .pcb-showcase,
  .pcb-process,
  .pcb-cta {
    padding-top: 5rem;
    padding-bottom: 5rem;
  }
  /* pcb-tools was excluded from the 900px side-padding rule — fix here */
  .pcb-tools {
    padding-top: 3rem;
    padding-bottom: 3rem;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
  .pcb-svc-intro {
    margin-bottom: 2.5rem;
  }
  .pcb-svc-row {
    padding: 2rem 0;
  }
  .pcb-proc-intro {
    margin-bottom: 3.5rem;
  }
  .pcb-cta-deco {
    width: 160px;
    height: 160px;
  }
}

/* ── 680px existing — fix: pcb-tools missing from side-padding override ── */
@media (max-width: 680px) {
  .pcb-tools {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }
}

/* ── 560px: Medium mobile — stack buttons, compress sections ── */
@media (max-width: 560px) {
  .pcb-hero-inner {
    padding: 4rem 1.25rem 3rem;
    gap: 1.5rem;
  }
  .pcb-h1 {
    font-size: clamp(2rem, 9vw, 2.8rem);
  }
  .pcb-hero-sub {
    font-size: 0.95rem;
  }
  /* Stack hero buttons to full-width column — more tappable, more premium */
  .pcb-hero-btns {
    flex-direction: column;
    gap: 0.75rem;
  }
  .pcb-hero-btns .pcb-btn {
    width: 100%;
    justify-content: center;
    min-height: 48px;
    padding: 0.875rem 1.5rem;
  }
  .pcb-hero-model-col {
    max-width: 320px;
  }
  .pcb-services,
  .pcb-layers,
  .pcb-showcase,
  .pcb-process,
  .pcb-cta {
    padding-top: 4rem;
    padding-bottom: 4rem;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }
  .pcb-tools {
    padding: 3rem 1.25rem;
  }
  .pcb-svc-body h3 {
    font-size: 1.2rem;
  }
  .pcb-tool-item {
    padding: 1.4rem 1.25rem;
  }
  .pcb-cta-deco {
    width: 120px;
    height: 120px;
    opacity: 0.4;
  }
  .pcb-cta-heading {
    font-size: clamp(1.9rem, 8vw, 2.5rem);
  }
  /* Scale-down PCB layer stack at intermediate size */
  .pcb-stack-scene {
    transform: scale(0.72);
    transform-origin: center center;
  }
  /* Prevent layout collapse from the CSS scale shrink */
  .pcb-stack-wrap {
    min-height: 145px;
  }
}

/* ── 480px existing — extend: hero padding + section verticals + stack resize ── */
@media (max-width: 480px) {
  .pcb-hero-inner {
    padding: 3.5rem 1.25rem 3rem;
  }
  .pcb-hero-model-col {
    max-width: 280px;
  }
  .pcb-services,
  .pcb-layers,
  .pcb-showcase,
  .pcb-process,
  .pcb-cta {
    padding-top: 3rem;
    padding-bottom: 3rem;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }
  .pcb-tools {
    padding: 2.5rem 1.25rem;
  }
  .pcb-proc-intro {
    margin-bottom: 3rem;
  }
  /* Replace scale() with actual smaller layer dimensions — eliminates layout ghost space */
  .pcb-stack-inner,
  .pcb-layer {
    width: 260px;
    height: 148px;
  }
  .pcb-stack-scene {
    transform: none;
  }
  .pcb-stack-wrap {
    min-height: 0;
  }
}

/* ── 430px: iPhone Pro Max — layout tightening ── */
@media (max-width: 430px) {
  .pcb-h1 {
    font-size: clamp(1.9rem, 8.5vw, 2.6rem);
  }
  .pcb-hero-inner {
    padding: 3.5rem 1.25rem 2.5rem;
    gap: 1.25rem;
  }
  .pcb-hero-model-col {
    max-width: 260px;
  }
  .pcb-svc-row {
    grid-template-columns: 44px 1fr;
    gap: 1rem;
    padding: 1.5rem 0;
  }
  .pcb-svc-num {
    font-size: 0.65rem;
  }
  .pcb-svc-body h3 {
    font-size: 1.1rem;
  }
  .pcb-svc-body p {
    font-size: 0.90rem;
  }
  .pcb-proc-nodes {
    gap: 1rem;
  }
  .pcb-proc-step {
    font-size: 1.2rem;
  }
  .pcb-proc-name {
    font-size: 0.85rem;
  }
  .pcb-proc-desc {
    font-size: 0.70rem;
    max-width: 100%;
  }
  .pcb-cta-heading {
    font-size: clamp(1.8rem, 8vw, 2.4rem);
  }
  .pcb-stack-inner,
  .pcb-layer {
    width: 240px;
    height: 137px;
  }
}

/* ── 390px: iPhone 15 / standard ── */
@media (max-width: 390px) {
  .pcb-h1 {
    font-size: clamp(1.75rem, 8vw, 2.2rem);
  }
  .pcb-hero-inner {
    padding: 3rem 1.25rem 2.5rem;
  }
  .pcb-hero-model-col {
    max-width: 240px;
  }
  .pcb-hero-sub {
    font-size: 0.90rem;
    margin-bottom: 1.6rem;
  }
  .pcb-services,
  .pcb-layers,
  .pcb-showcase,
  .pcb-process,
  .pcb-cta {
    padding-top: 2.75rem;
    padding-bottom: 2.75rem;
  }
  .pcb-tools {
    padding-top: 2.5rem;
    padding-bottom: 2.5rem;
  }
  .pcb-cta-sub {
    font-size: 0.93rem;
  }
  .pcb-cta-heading {
    font-size: clamp(1.65rem, 8vw, 2.2rem);
  }
  .pcb-proc-intro {
    margin-bottom: 2.5rem;
  }
  .pcb-svc-body p {
    font-size: 0.88rem;
  }
}

/* ── 360px: Minimum supported width ── */
@media (max-width: 360px) {
  .pcb-h1 {
    font-size: clamp(1.6rem, 7.5vw, 2rem);
    letter-spacing: -0.01em;
  }
  .pcb-hero-inner {
    padding: 3rem 1rem 2rem;
    gap: 1.25rem;
  }
  .pcb-hero-sub {
    font-size: 0.88rem;
  }
  /* Compact tag strip */
  .pcb-hero-tags {
    gap: 0.4rem;
  }
  .pcb-hero-tags span {
    font-size: 0.65rem;
    padding: 0.22rem 0.6rem;
  }
  /* Tighten service rows */
  .pcb-svc-row {
    grid-template-columns: 36px 1fr;
    gap: 0.75rem;
    padding: 1.25rem 0;
  }
  .pcb-svc-body h3 {
    font-size: 1rem;
  }
  .pcb-svc-body p {
    font-size: 0.85rem;
  }
  /* All content sections — min 20px horizontal, 40px vertical */
  .pcb-services,
  .pcb-layers,
  .pcb-showcase,
  .pcb-process,
  .pcb-cta {
    padding-left: 1rem;
    padding-right: 1rem;
    padding-top: 2.5rem;
    padding-bottom: 2.5rem;
  }
  .pcb-tools {
    padding: 2rem 1rem;
  }
  /* Shrink stack layers to fit cleanly within 320px content area */
  .pcb-stack-inner,
  .pcb-layer {
    width: 220px;
    height: 126px;
  }
  /* Remove large deco SVG — no room, no value at this width */
  .pcb-cta-deco {
    display: none;
  }
  .pcb-cta-heading {
    font-size: clamp(1.5rem, 7vw, 1.9rem);
  }
  .pcb-tool-item {
    padding: 1.25rem 1rem;
  }
  .pcb-proc-step {
    font-size: 1.1rem;
  }
  .pcb-proc-name {
    font-size: 0.82rem;
  }
  .pcb-proc-desc {
    font-size: 0.68rem;
  }
  /* Hero model — minimum size at 360px, still visible */
  .pcb-hero-model-col {
    max-width: 220px;
  }
  /* Float button: compact at 360px */
  .pcb-float-btn {
    bottom: 1.5rem;
    left: 1rem;
    padding: 0.7rem 1.1rem;
    font-size: 0.78rem;
  }
}

/* ═══════════════════════════════════════════════
   TOUCH DEVICE — HOVER STATE PARTIAL VISIBILITY
   On (hover: none) devices, CSS :hover never fires.
   Show the copper wash at reduced opacity so service
   rows retain their PCB atmosphere on touch screens.
═══════════════════════════════════════════════ */
@media (hover: none) {
  /* Copper row wash — always softly visible on touch */
  .pcb-svc-row::after {
    opacity: 0.18;
  }
  /* Tool cards — slight tint always on, no hover needed */
  .pcb-tool-item:hover {
    transform: none;
  }
}

/* ═══════════════════════════════════════════════
   NO-JS SAFETY NET
   The inline script adds .js-enabled synchronously.
   If JS is fully disabled, that class is never set —
   reveal everything that GSAP would animate.
═══════════════════════════════════════════════ */
html:not(.js-enabled) .pcb-eyebrow,
html:not(.js-enabled) .pcb-hw,
html:not(.js-enabled) .pcb-hero-sub,
html:not(.js-enabled) .pcb-hero-btns,
html:not(.js-enabled) .pcb-hero-tags,
html:not(.js-enabled) .pcb-hero-model-col,
html:not(.js-enabled) .pcb-svc-row,
html:not(.js-enabled) .pcb-proc-node,
html:not(.js-enabled) .pcb-tool-item {
  opacity: 1 !important;
  transform: none !important;
}

/* ── Reduced-motion CSS guarantee ──
   The JS handler in pcb-gsap.js also covers this,
   but CSS must be the last line of defence. */
@media (prefers-reduced-motion: reduce) {
  .pcb-eyebrow,
  .pcb-hw,
  .pcb-hero-sub,
  .pcb-hero-btns,
  .pcb-hero-tags,
  .pcb-hero-model-col,
  .pcb-svc-row,
  .pcb-proc-node,
  .pcb-tool-item {
    opacity: 1;
    transform: none;
  }
  .pcb-hud-dot,
  .pcb-float-btn {
    animation: none;
  }
  .pcb-stack-inner {
    transform: none !important; /* no 3D rotation on reduced-motion */
  }
}