/* ============================================================
   ZYENTRIX INC — Design System v2
   ============================================================ */

/* ── Tokens ──────────────────────────────────────────────────── */
:root {
  --dark-900:   #020810;
  --dark-800:   #060f20;
  --dark-700:   #0b1739;
  --dark-600:   #0f2158;
  --blue-700:   #1d4ed8;
  --blue-600:   #2563eb;
  --blue-500:   #3b82f6;
  --blue-400:   #60a5fa;
  --cyan-600:   #0891b2;
  --cyan-500:   #06b6d4;
  --cyan-400:   #22d3ee;
  --gray-50:    #f8fafc;
  --gray-100:   #f1f5f9;
  --gray-200:   #e2e8f0;
  --gray-300:   #cbd5e1;
  --gray-400:   #94a3b8;
  --gray-500:   #64748b;
  --gray-600:   #475569;
  --gray-700:   #334155;
  --gray-800:   #1e293b;
  --gray-900:   #0f172a;
  --white:      #ffffff;

  --bg-dark:       var(--dark-800);
  --bg-light:      var(--gray-50);
  --border-dark:   rgba(255,255,255,0.07);
  --border-light:  var(--gray-200);
  --accent:        var(--blue-600);
  --accent-hover:  var(--blue-700);
  --accent-alt:    var(--cyan-500);

  --font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'Fira Code', monospace;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;

  --space-1:  0.25rem;   --space-2:  0.5rem;    --space-3:  0.75rem;
  --space-4:  1rem;      --space-5:  1.25rem;   --space-6:  1.5rem;
  --space-8:  2rem;      --space-10: 2.5rem;    --space-12: 3rem;
  --space-16: 4rem;      --space-20: 5rem;      --space-24: 6rem;

  --radius-sm: 4px;  --radius-md: 8px;   --radius-lg: 12px;
  --radius-xl: 16px; --radius-2xl: 24px; --radius-full: 9999px;

  --shadow-md: 0 4px 16px rgba(0,0,0,.10);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.15);
  --shadow-xl: 0 16px 48px rgba(0,0,0,.20);
  --glow-blue: 0 0 40px rgba(37,99,235,.15);
  --glow-cyan: 0 0 40px rgba(6,182,212,.15);

  --container-max: 1200px;
  --container-pad: clamp(1rem, 4vw, 2rem);
  --nav-h: 68px;
  --trans-fast: 150ms ease;
  --trans-base: 250ms ease;
  --trans-slow: 400ms ease;
}

/* ── Reset ───────────────────────────────────────────────────── */
/* Ensure HTML [hidden] attribute is never overridden by CSS display rules */
[hidden] { display: none !important; }

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-base);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--gray-900);
  background: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
input, textarea, select { font: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0; }

/* ── Layout ──────────────────────────────────────────────────── */
.container { max-width: var(--container-max); margin-inline: auto; padding-inline: var(--container-pad); }
section { scroll-margin-top: var(--nav-h); }

/* ── Type helpers ────────────────────────────────────────────── */
.section-tag {
  display: inline-block; font-size: var(--text-xs); font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase; color: var(--blue-500);
  margin-bottom: var(--space-3);
}
.section-header { text-align: center; max-width: 680px; margin-inline: auto; margin-bottom: var(--space-16); }
.section-title { font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl)); font-weight: 700; line-height: 1.15; letter-spacing: -.02em; margin-bottom: var(--space-4); }
.section-subtitle { font-size: var(--text-lg); color: var(--gray-500); line-height: 1.7; }
.gradient-text { background: linear-gradient(135deg, var(--blue-400) 0%, var(--cyan-400) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-size: var(--text-sm); font-weight: 600;
  padding: .625rem 1.25rem; border-radius: var(--radius-md);
  transition: all var(--trans-base); white-space: nowrap;
  position: relative; overflow: hidden;
}
.btn::after { content: ''; position: absolute; inset: 0; background: rgba(255,255,255,.1); opacity: 0; transition: opacity var(--trans-fast); }
.btn:hover::after { opacity: 1; }

.btn-primary { background: var(--blue-600); color: var(--white); box-shadow: 0 2px 8px rgba(37,99,235,.35); }
.btn-primary:hover { background: var(--blue-700); box-shadow: 0 4px 16px rgba(37,99,235,.45); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }

.btn-outline { background: transparent; color: var(--blue-500); border: 1.5px solid var(--blue-500); }
.btn-outline:hover { background: var(--blue-600); color: var(--white); border-color: var(--blue-600); }

.btn-ghost { background: rgba(255,255,255,.08); color: var(--white); border: 1.5px solid rgba(255,255,255,.2); backdrop-filter: blur(8px); }
.btn-ghost:hover { background: rgba(255,255,255,.15); border-color: rgba(255,255,255,.4); }

.btn-lg   { font-size: var(--text-base); padding: .875rem 1.75rem; border-radius: var(--radius-lg); }
.btn-sm   { font-size: var(--text-xs); padding: .375rem .875rem; }
.btn-full { width: 100%; justify-content: center; }

.btn-arrow { width: 18px; height: 18px; flex-shrink: 0; transition: transform var(--trans-base); }
.btn:hover .btn-arrow { transform: translateX(3px); }

/* ── Navigation ──────────────────────────────────────────────── */
#navbar {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 1000; height: var(--nav-h);
  transition: background var(--trans-base), box-shadow var(--trans-base);
}
#navbar.scrolled {
  background: rgba(3,8,16,.95); backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border-dark), 0 4px 24px rgba(0,0,0,.3);
}
.nav-container {
  max-width: var(--container-max); height: 100%; margin-inline: auto;
  padding-inline: var(--container-pad); display: flex; align-items: center; gap: var(--space-8);
}
.nav-logo { display: flex; align-items: baseline; gap: 2px; flex-shrink: 0; }
.logo-mark { font-size: 1.5rem; font-weight: 800; color: var(--blue-500); letter-spacing: -.02em; line-height: 1; }
.logo-name { font-size: 1.25rem; font-weight: 700; color: var(--white); letter-spacing: -.01em; }
.logo-inc  { font-size: var(--text-xs); font-weight: 500; color: var(--gray-400); margin-left: 4px; letter-spacing: .05em; }
.nav-links { display: flex; align-items: center; gap: var(--space-1); margin-left: auto; }
.nav-link { font-size: var(--text-sm); font-weight: 500; color: var(--gray-300); padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm); transition: color var(--trans-fast), background var(--trans-fast); }
.nav-link:hover, .nav-link.active { color: var(--white); background: rgba(255,255,255,.06); }
.nav-cta { margin-left: var(--space-4); flex-shrink: 0; }

.hamburger { display: none; flex-direction: column; gap: 5px; padding: 6px; margin-left: auto; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--white); border-radius: 2px; transition: all var(--trans-base); }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  position: fixed; inset: 0; background: var(--dark-800); z-index: 999;
  display: flex; flex-direction: column; align-items: flex-start;
  padding: calc(var(--nav-h) + var(--space-8)) var(--space-8) var(--space-8);
  gap: var(--space-2); transform: translateX(-100%); transition: transform var(--trans-slow);
}
.mobile-menu.open { transform: translateX(0); }
.mobile-menu ul { width: 100%; display: flex; flex-direction: column; gap: var(--space-1); }
.mobile-menu .nav-link { font-size: var(--text-xl); font-weight: 600; padding: var(--space-3) var(--space-4); display: block; width: 100%; border-radius: var(--radius-md); }
.mobile-menu .btn { margin-top: var(--space-6); width: 100%; justify-content: center; }
.mobile-close { position: absolute; top: 1rem; right: 1.5rem; font-size: 2rem; color: var(--gray-400); line-height: 1; transition: color var(--trans-fast); }
.mobile-close:hover { color: var(--white); }
.mobile-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.7); z-index: 998; opacity: 0; pointer-events: none; transition: opacity var(--trans-slow); }
.mobile-overlay.open { opacity: 1; pointer-events: all; }

/* ============================================================
   HERO
============================================================ */
.hero {
  position: relative; min-height: 100svh; display: flex; align-items: center;
  background: var(--dark-800); padding-top: var(--nav-h); overflow: hidden;
}

/* Canvas circuit board */
#circuitCanvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  pointer-events: none; z-index: 0;
  opacity: 0.9;
}

.hero-glow {
  position: absolute; width: 700px; height: 700px; border-radius: 50%;
  filter: blur(140px); pointer-events: none; z-index: 0;
}
.hero-glow--left  { top: -200px; left: -200px; background: radial-gradient(circle, rgba(37,99,235,.14) 0%, transparent 70%); }
.hero-glow--right { bottom: -200px; right: -200px; background: radial-gradient(circle, rgba(6,182,212,.10) 0%, transparent 70%); }

.hero-content { position: relative; z-index: 1; padding-block: var(--space-24); max-width: 860px; }

.hero-badge {
  display: inline-flex; align-items: center; gap: var(--space-2);
  background: rgba(37,99,235,.12); border: 1px solid rgba(37,99,235,.3);
  border-radius: var(--radius-full); padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs); font-weight: 600; color: var(--blue-400);
  letter-spacing: .05em; text-transform: uppercase; margin-bottom: var(--space-6);
}
.badge-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--cyan-400); animation: pulseDot 2s ease-in-out infinite; }
@keyframes pulseDot { 0%,100% { opacity:1; transform:scale(1); } 50% { opacity:.4; transform:scale(.7); } }

.hero-title { font-size: clamp(2.5rem, 7vw, 4.5rem); font-weight: 800; line-height: 1.05; letter-spacing: -.03em; color: var(--white); margin-bottom: var(--space-6); }
.hero-subtitle { font-size: clamp(var(--text-lg), 2.5vw, var(--text-xl)); color: var(--gray-400); line-height: 1.75; max-width: 640px; margin-bottom: var(--space-10); }
.hero-subtitle strong { color: var(--gray-200); font-weight: 500; }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-bottom: var(--space-16); }

.hero-stats {
  display: flex; flex-wrap: wrap; gap: var(--space-6); align-items: center;
  padding: var(--space-6) var(--space-8);
  background: rgba(255,255,255,.04); border: 1px solid var(--border-dark);
  border-radius: var(--radius-xl); backdrop-filter: blur(8px); width: fit-content;
}
.stat-item { display: flex; flex-direction: column; gap: var(--space-1); }
.stat-value { font-size: var(--text-2xl); font-weight: 800; color: var(--white); letter-spacing: -.02em; line-height: 1; }
.stat-label { font-size: var(--text-xs); color: var(--gray-500); font-weight: 500; letter-spacing: .02em; }
.stat-divider { width: 1px; height: 40px; background: var(--border-dark); }

.hero-scroll { position: absolute; bottom: var(--space-8); left: 50%; transform: translateX(-50%); }
.scroll-line { width: 1px; height: 56px; background: linear-gradient(to bottom, transparent, rgba(255,255,255,.3), transparent); animation: scrollAnim 2s ease-in-out infinite; }
@keyframes scrollAnim { 0% { opacity:0; transform:scaleY(0) translateY(-50%); } 50% { opacity:1; transform:scaleY(1); } 100% { opacity:0; transform:scaleY(0) translateY(50%); } }

/* ============================================================
   MARQUEE
============================================================ */
.marquee-section {
  background: var(--dark-900); border-top: 1px solid var(--border-dark); border-bottom: 1px solid var(--border-dark);
  overflow: hidden; padding-block: var(--space-4); white-space: nowrap; position: relative;
}
.marquee-section::before,
.marquee-section::after {
  content: ''; position: absolute; top: 0; bottom: 0; width: 120px; z-index: 1; pointer-events: none;
}
.marquee-section::before { left: 0; background: linear-gradient(to right, var(--dark-900), transparent); }
.marquee-section::after  { right: 0; background: linear-gradient(to left, var(--dark-900), transparent); }

.marquee-track {
  display: inline-flex; gap: 0;
  animation: marqueeScroll 40s linear infinite;
}
.marquee-section:hover .marquee-track { animation-play-state: paused; }

@keyframes marqueeScroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }

.marquee-item {
  display: inline-flex; align-items: center; gap: var(--space-3);
  padding-inline: var(--space-6); font-size: var(--text-sm); font-weight: 500;
  color: var(--gray-500); white-space: nowrap; font-family: var(--font-base);
  transition: color var(--trans-fast);
}
.marquee-item:hover { color: var(--gray-300); }
.mi-dot { width: 4px; height: 4px; border-radius: 50%; background: var(--blue-600); flex-shrink: 0; }

/* ============================================================
   PRODUCT SHOWCASE
============================================================ */
.showcase { padding-block: var(--space-24); background: var(--dark-800); }
.showcase .section-tag { color: var(--cyan-400); }
.showcase .section-title { color: var(--white); }
.showcase .section-subtitle { color: var(--gray-400); }

.showcase-grid {
  display: flex; flex-direction: column; gap: var(--space-8);
}

.sc-card {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 0;
  background: var(--dark-700); border: 1px solid var(--border-dark);
  border-radius: var(--radius-2xl); overflow: hidden;
  transition: border-color var(--trans-base), box-shadow var(--trans-base);
}
.sc-card:hover { border-color: rgba(37,99,235,.4); box-shadow: 0 12px 48px rgba(37,99,235,.12); }
.sc-card:nth-child(even) { grid-template-columns: 1fr 1.1fr; direction: rtl; }
.sc-card:nth-child(even) > * { direction: ltr; }

.sc-visual {
  position: relative; background: var(--dark-900); padding: var(--space-6);
  display: flex; flex-direction: column; gap: var(--space-3); min-height: 320px;
  border-right: 1px solid var(--border-dark);
}
.sc-card:nth-child(even) .sc-visual { border-right: none; border-left: 1px solid var(--border-dark); }

.sc-visual-inner { flex: 1; display: flex; align-items: center; justify-content: center; }
.sc-visual-inner svg { width: 100%; height: auto; max-height: 260px; }

.sc-visual-label {
  font-family: var(--font-mono); font-size: var(--text-xs); font-weight: 600;
  color: var(--gray-600); letter-spacing: .1em; text-transform: uppercase;
  text-align: center; border-top: 1px solid var(--border-dark); padding-top: var(--space-3);
}

/* PCB SVG animations */
.pcb-trace {
  stroke-dasharray: 600;
  stroke-dashoffset: 600;
}
.sc-card.in-view .pcb-trace { animation: drawTrace 1.5s ease forwards; }
.sc-card.in-view .pcb-trace.t1 { animation-delay: 0s; }
.sc-card.in-view .pcb-trace.t2 { animation-delay: .25s; }
.sc-card.in-view .pcb-trace.t3 { animation-delay: .5s; }
.sc-card.in-view .pcb-trace.t4 { animation-delay: .7s; }
.sc-card.in-view .pcb-trace.t5 { animation-delay: .8s; }
.sc-card.in-view .pcb-trace.t6 { animation-delay: .4s; }
@keyframes drawTrace { to { stroke-dashoffset: 0; } }

/* Service tab trace animations */
.svc-trace {
  stroke-dasharray: 400; stroke-dashoffset: 400;
}
.stab-panel.active .svc-trace { animation: drawTrace 1.2s ease forwards; }
.stab-panel.active .svc-trace:nth-child(2) { animation-delay: .3s; }
.stab-panel.active .svc-trace:nth-child(3) { animation-delay: .6s; }

/* LED pulse */
.led-pulse { animation: ledPulse 1.8s ease-in-out infinite; }
@keyframes ledPulse { 0%,100% { opacity:1; filter:drop-shadow(0 0 3px currentColor); } 50% { opacity:.25; filter:none; } }

/* Fiber light pulse */
.fiber-pulse {
  animation: fiberPulse 2.2s linear infinite;
  filter: drop-shadow(0 0 4px rgba(96,165,250,.8));
}
@keyframes fiberPulse {
  0%   { transform: translateX(0);    opacity:0; }
  5%   { opacity: 1; }
  92%  { opacity: 1; }
  100% { transform: translateX(250px); opacity:0; }
}

/* GDT spark */
.gdt-spark { animation: gdtSpark 3s ease-in-out infinite; }
@keyframes gdtSpark {
  0%,100% { opacity:0; }
  40%,60% { opacity:1; filter:drop-shadow(0 0 3px rgba(6,182,212,.8)); }
  50%      { opacity:.6; }
}

/* Patch cord pulse */
.patch-pulse {
  animation: patchPulse 1.8s linear infinite;
}
.patch-pulse.p2 { animation-delay: .4s; }
@keyframes patchPulse {
  0%   { transform: translateX(0);    opacity:0; }
  8%   { opacity: .9; }
  90%  { opacity: .9; }
  100% { transform: translateX(165px); opacity:0; }
}

.sc-info { padding: var(--space-8); display: flex; flex-direction: column; justify-content: center; gap: var(--space-5); }

.sc-info h3 { font-size: var(--text-2xl); font-weight: 700; color: var(--white); letter-spacing: -.02em; line-height: 1.2; }

.sc-features { display: flex; flex-direction: column; gap: var(--space-2); }
.sc-features li {
  display: flex; align-items: flex-start; gap: var(--space-3);
  font-size: var(--text-sm); color: var(--gray-400); line-height: 1.6;
}
.sc-features li svg { flex-shrink: 0; width: 14px; height: 14px; color: var(--cyan-400); margin-top: 3px; }

.sc-spec-row {
  display: flex; gap: var(--space-1); padding: var(--space-4);
  background: rgba(255,255,255,.03); border: 1px solid var(--border-dark); border-radius: var(--radius-lg);
}
.sc-spec { flex: 1; display: flex; flex-direction: column; gap: 2px; padding-inline: var(--space-3); border-right: 1px solid var(--border-dark); }
.sc-spec:last-child { border-right: none; }
.sc-spec span { font-size: 10px; font-weight: 600; color: var(--gray-600); text-transform: uppercase; letter-spacing: .05em; font-family: var(--font-mono); }
.sc-spec strong { font-size: var(--text-sm); color: var(--white); font-weight: 700; }

/* ============================================================
   ABOUT
============================================================ */
.about { padding-block: var(--space-24); background: var(--bg-light); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-16); align-items: start; }
.about .section-title { color: var(--gray-900); }
.about-lead { font-size: var(--text-lg); color: var(--gray-600); line-height: 1.75; margin-bottom: var(--space-8); }

.feature-list { display: flex; flex-direction: column; gap: var(--space-5); margin-bottom: var(--space-10); }
.feature-item { display: flex; gap: var(--space-4); align-items: flex-start; }
.feature-check { flex-shrink: 0; width: 22px; height: 22px; border-radius: 50%; background: rgba(37,99,235,.1); border: 1.5px solid rgba(37,99,235,.3); display: flex; align-items: center; justify-content: center; margin-top: 2px; }
.feature-check svg { width: 12px; height: 12px; color: var(--blue-500); }
.feature-item strong { display: block; font-size: var(--text-base); font-weight: 600; color: var(--gray-900); margin-bottom: var(--space-1); }
.feature-item p { font-size: var(--text-sm); color: var(--gray-500); line-height: 1.65; }

.cap-cards-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); margin-bottom: var(--space-4); }
.cap-card {
  background: var(--white); border: 1px solid var(--border-light); border-radius: var(--radius-lg);
  padding: var(--space-5); display: flex; flex-direction: column; gap: var(--space-2);
  transition: border-color var(--trans-base), transform var(--trans-base), box-shadow var(--trans-base);
}
.cap-card:hover { border-color: var(--blue-400); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.cap-icon { width: 36px; height: 36px; color: var(--blue-500); }
.cap-icon svg { width: 100%; height: 100%; }
.cap-value { font-size: var(--text-2xl); font-weight: 800; color: var(--gray-900); letter-spacing: -.02em; line-height: 1; }
.cap-label { font-size: var(--text-xs); color: var(--gray-500); font-weight: 500; }

.quality-badge { background: linear-gradient(135deg, rgba(37,99,235,.08), rgba(6,182,212,.04)); border: 1px solid rgba(37,99,235,.2); border-radius: var(--radius-lg); padding: var(--space-4) var(--space-5); display: flex; align-items: center; gap: var(--space-3); }
.qb-icon { width: 36px; height: 36px; flex-shrink: 0; color: var(--blue-500); }
.qb-icon svg { width: 100%; height: 100%; }
.quality-badge strong { display: block; font-size: var(--text-sm); font-weight: 700; color: var(--gray-900); }
.quality-badge span { font-size: var(--text-xs); color: var(--gray-500); }

/* ============================================================
   SERVICES — TABBED
============================================================ */
.services { padding-block: var(--space-24); background: var(--dark-800); }
.services .section-title { color: var(--white); }
.services .section-subtitle { color: var(--gray-400); }

/* Tab nav */
.stab-nav {
  display: flex; gap: var(--space-3); margin-bottom: var(--space-8); flex-wrap: wrap;
  background: rgba(255,255,255,.04); border: 1px solid var(--border-dark);
  border-radius: var(--radius-xl); padding: var(--space-2);
}
.stab-btn {
  flex: 1; display: flex; align-items: center; justify-content: center; gap: var(--space-3);
  padding: var(--space-4) var(--space-5); border-radius: var(--radius-lg);
  font-size: var(--text-sm); font-weight: 600; color: var(--gray-500);
  transition: all var(--trans-base); min-width: 180px;
}
.stab-btn:hover { color: var(--gray-200); background: rgba(255,255,255,.05); }
.stab-btn.active { background: var(--blue-600); color: var(--white); box-shadow: 0 4px 16px rgba(37,99,235,.4); }
.stab-icon { width: 20px; height: 20px; flex-shrink: 0; }
.stab-icon svg { width: 100%; height: 100%; }

/* Tab panels */
.stab-panel { display: none; }
.stab-panel.active { display: block; animation: fadeInUp .3s ease; }
@keyframes fadeInUp { from { opacity:0; transform:translateY(12px); } to { opacity:1; transform:translateY(0); } }

.stab-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 0; background: rgba(255,255,255,.03); border: 1px solid var(--border-dark); border-radius: var(--radius-xl); overflow: hidden; }

.stab-visual { background: var(--dark-900); padding: var(--space-8); border-right: 1px solid var(--border-dark); display: flex; flex-direction: column; gap: var(--space-5); }
.stab-vis-card { height: 100%; display: flex; flex-direction: column; gap: var(--space-4); }
.svc-svg-wrap { flex: 1; display: flex; align-items: center; justify-content: center; }
.svc-svg-wrap svg { width: 100%; height: auto; max-height: 220px; }

.stab-vis--ems    { border-top: 3px solid var(--blue-600); border-radius: var(--radius-lg); }
.stab-vis--design { border-top: 3px solid var(--cyan-500); border-radius: var(--radius-lg); }
.stab-vis--telecom{ border-top: 3px solid #7C3AED; border-radius: var(--radius-lg); }

.stab-vis-tags { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.stab-vis-tags span {
  font-size: var(--text-xs); font-weight: 600; font-family: var(--font-mono);
  color: var(--gray-500); background: rgba(255,255,255,.04);
  border: 1px solid var(--border-dark); border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-3); letter-spacing: .04em;
}

.stab-items { padding: var(--space-8); display: flex; flex-direction: column; gap: var(--space-2); }

.si { display: flex; gap: var(--space-4); padding: var(--space-4); border-radius: var(--radius-lg); transition: background var(--trans-fast); cursor: default; }
.si:hover { background: rgba(255,255,255,.04); }
.si-icon { flex-shrink: 0; width: 36px; height: 36px; background: rgba(37,99,235,.1); color: var(--blue-400); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; padding: var(--space-2); margin-top: 2px; transition: background var(--trans-fast); }
.si-icon svg { width: 100%; height: 100%; }
.si:hover .si-icon { background: rgba(37,99,235,.2); }
.si h4 { font-size: var(--text-sm); font-weight: 700; color: var(--white); margin-bottom: var(--space-1); }
.si p  { font-size: var(--text-sm); color: var(--gray-500); line-height: 1.65; }

/* ============================================================
   PROCESS
============================================================ */
.process { padding-block: var(--space-24); background: var(--white); }

.process-track { position: relative; }

/* Animated connecting line */
.process-line {
  position: absolute; top: 60px; left: calc(12.5% + 24px); right: calc(12.5% + 24px);
  height: 2px; background: linear-gradient(to right, var(--blue-600), var(--cyan-500));
  transform-origin: left; transform: scaleX(0); transition: transform 1.2s ease .4s;
  z-index: 0; display: none;
}
.process-line.drawn { transform: scaleX(1); }

.process-steps { display: grid; grid-template-columns: repeat(4,1fr); gap: var(--space-6); position: relative; z-index: 1; }

.process-step {
  position: relative; text-align: center; padding: var(--space-8) var(--space-5);
  background: var(--gray-50); border: 1px solid var(--border-light); border-radius: var(--radius-xl);
  transition: border-color var(--trans-base), box-shadow var(--trans-base), transform var(--trans-base);
}
.process-step:hover { border-color: var(--blue-500); box-shadow: 0 8px 24px rgba(37,99,235,.1); transform: translateY(-4px); }

.step-num {
  display: inline-block; font-size: var(--text-xs); font-weight: 800; letter-spacing: .1em;
  color: var(--blue-600); background: rgba(37,99,235,.08); border: 1px solid rgba(37,99,235,.2);
  border-radius: var(--radius-full); padding: var(--space-1) var(--space-3); margin-bottom: var(--space-5);
}
.step-icon-wrap {
  width: 60px; height: 60px; background: var(--white); border: 1.5px solid var(--border-light);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  margin-inline: auto; margin-bottom: var(--space-5); color: var(--blue-600);
  transition: border-color var(--trans-base), background var(--trans-base);
}
.step-icon-wrap svg { width: 28px; height: 28px; }
.process-step:hover .step-icon-wrap { background: rgba(37,99,235,.08); border-color: var(--blue-400); }
.process-step h3 { font-size: var(--text-lg); font-weight: 700; color: var(--gray-900); margin-bottom: var(--space-3); }
.process-step p  { font-size: var(--text-sm); color: var(--gray-500); line-height: 1.7; }

/* ============================================================
   INDUSTRIES
============================================================ */
.industries { padding-block: var(--space-24); background: var(--dark-800); }
.industries .section-tag   { color: var(--cyan-400); }
.industries .section-title { color: var(--white); }
.industries .section-subtitle { color: var(--gray-400); }

.industries-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--space-6); }

.industry-card {
  background: var(--dark-700); border: 1px solid var(--border-dark);
  border-radius: var(--radius-xl); padding: var(--space-8);
  transition: border-color var(--trans-base), box-shadow var(--trans-base), transform var(--trans-base);
  cursor: default;
}
.industry-card:hover { border-color: rgba(37,99,235,.5); box-shadow: 0 8px 32px rgba(37,99,235,.15); transform: translateY(-4px); }
.ind-icon {
  width: 56px; height: 56px; background: rgba(37,99,235,.1); border: 1.5px solid rgba(37,99,235,.2);
  border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center;
  color: var(--blue-400); margin-bottom: var(--space-5);
  transition: background var(--trans-base), border-color var(--trans-base);
}
.ind-icon svg { width: 30px; height: 30px; }
.industry-card:hover .ind-icon { background: rgba(37,99,235,.18); border-color: rgba(37,99,235,.45); }
.industry-card h3 { font-size: var(--text-xl); font-weight: 700; color: var(--white); margin-bottom: var(--space-3); }
.industry-card p  { font-size: var(--text-sm); color: var(--gray-400); line-height: 1.7; margin-bottom: var(--space-5); }

.ind-tags { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.ind-tags li {
  font-size: var(--text-xs); font-weight: 600; color: var(--blue-400);
  background: rgba(37,99,235,.1); border: 1px solid rgba(37,99,235,.2);
  border-radius: var(--radius-full); padding: var(--space-1) var(--space-3); letter-spacing: .02em;
}

/* ============================================================
   TRUST
============================================================ */
.trust { padding-block: var(--space-24); background: var(--bg-light); }
.trust-inner { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-16); align-items: center; margin-bottom: var(--space-16); }
.trust-text .section-title { color: var(--gray-900); }
.trust-text p { font-size: var(--text-lg); color: var(--gray-600); line-height: 1.75; margin-top: var(--space-4); }

.certifications { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.cert-card { background: var(--white); border: 1px solid var(--border-light); border-radius: var(--radius-lg); padding: var(--space-5); display: flex; flex-direction: column; gap: var(--space-3); transition: border-color var(--trans-base), box-shadow var(--trans-base); }
.cert-card:hover { border-color: var(--blue-400); box-shadow: var(--shadow-md); }
.cert-badge { width: 52px; height: 52px; border-radius: var(--radius-md); background: var(--blue-600); color: var(--white); display: flex; flex-direction: column; align-items: center; justify-content: center; }
.cert-badge--green { background: #16a34a; }
.cert-badge--cyan  { background: var(--cyan-600); }
.cert-badge--dark  { background: var(--gray-800); }
.cert-abbr { font-size: 9px; font-weight: 800; letter-spacing: .05em; line-height: 1; }
.cert-num  { font-size: 13px; font-weight: 800; letter-spacing: -.02em; line-height: 1; }
.cert-label { font-size: var(--text-xs); font-weight: 600; color: var(--gray-700); line-height: 1.4; }

.partners-row { border-top: 1px solid var(--border-light); padding-top: var(--space-10); text-align: center; }
.partners-label { font-size: var(--text-sm); color: var(--gray-500); font-weight: 500; margin-bottom: var(--space-6); }
.partner-logos { display: flex; flex-wrap: wrap; gap: var(--space-4); justify-content: center; }
.partner-slot {
  background: var(--white); border: 1.5px dashed var(--gray-300);
  border-radius: var(--radius-lg); padding: var(--space-4) var(--space-6);
  font-size: var(--text-sm); font-weight: 600; color: var(--gray-400); min-width: 160px; text-align: center;
  transition: border-color var(--trans-base), color var(--trans-base);
}
.partner-slot:hover { border-color: var(--blue-400); color: var(--gray-600); }

/* ============================================================
   CONTACT
============================================================ */
.contact { padding-block: var(--space-24); background: var(--dark-800); }
.contact-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: var(--space-16); align-items: start; }
.contact .section-tag   { color: var(--cyan-400); }
.contact .section-title { color: var(--white); margin-bottom: var(--space-4); }
.contact-lead { font-size: var(--text-lg); color: var(--gray-400); line-height: 1.7; margin-bottom: var(--space-8); }

.contact-details { display: flex; flex-direction: column; gap: var(--space-5); margin-bottom: var(--space-8); }
.contact-detail  { display: flex; gap: var(--space-4); align-items: flex-start; }
.cd-icon { flex-shrink: 0; width: 40px; height: 40px; background: rgba(37,99,235,.1); border: 1.5px solid rgba(37,99,235,.25); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; color: var(--blue-400); }
.cd-icon svg { width: 18px; height: 18px; }
.contact-detail strong { display: block; font-size: var(--text-xs); font-weight: 700; color: var(--gray-400); text-transform: uppercase; letter-spacing: .06em; margin-bottom: var(--space-1); }
.contact-detail span   { font-size: var(--text-sm); color: var(--gray-300); }

.response-card { display: flex; gap: var(--space-4); align-items: flex-start; background: rgba(37,99,235,.1); border: 1px solid rgba(37,99,235,.3); border-radius: var(--radius-lg); padding: var(--space-5); }
.rc-icon { flex-shrink: 0; width: 36px; height: 36px; color: var(--cyan-400); }
.rc-icon svg { width: 100%; height: 100%; }
.response-card strong { display: block; font-size: var(--text-sm); font-weight: 700; color: var(--white); margin-bottom: var(--space-1); }
.response-card p { font-size: var(--text-sm); color: var(--gray-400); }

.contact-form-wrap { background: var(--white); border-radius: var(--radius-2xl); padding: var(--space-8); box-shadow: var(--shadow-xl); }
.form-header { margin-bottom: var(--space-6); padding-bottom: var(--space-5); border-bottom: 1px solid var(--border-light); }
.form-header h3 { font-size: var(--text-2xl); font-weight: 700; color: var(--gray-900); letter-spacing: -.01em; margin-bottom: var(--space-1); }
.form-header p  { font-size: var(--text-sm); color: var(--gray-500); }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.form-group { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-4); }
.form-group label { font-size: var(--text-sm); font-weight: 600; color: var(--gray-700); }
.form-group input, .form-group textarea, .form-group select {
  padding: .625rem .875rem; border: 1.5px solid var(--gray-300); border-radius: var(--radius-md);
  font-size: var(--text-sm); color: var(--gray-900); background: var(--white);
  transition: border-color var(--trans-fast), box-shadow var(--trans-fast); outline: none;
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--gray-400); }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { border-color: var(--blue-500); box-shadow: 0 0 0 3px rgba(37,99,235,.1); }
.form-group input.invalid, .form-group textarea.invalid, .form-group select.invalid { border-color: #ef4444; box-shadow: 0 0 0 3px rgba(239,68,68,.1); }
.form-group textarea { resize: vertical; min-height: 100px; }
.select-wrap { position: relative; }
.select-wrap select { width: 100%; appearance: none; padding-right: 2rem; }
.select-arrow { position: absolute; right: .75rem; top: 50%; transform: translateY(-50%); pointer-events: none; color: var(--gray-500); font-size: var(--text-xs); }
.field-error { font-size: var(--text-xs); color: #ef4444; font-weight: 500; min-height: 1em; }
.form-note { font-size: var(--text-xs); color: var(--gray-500); text-align: center; margin-top: var(--space-3); }
.form-note a { color: var(--blue-600); text-decoration: underline; }
.form-error {
  font-size: var(--text-sm);
  color: #ef4444;
  text-align: center;
  padding: var(--space-2) 0;
}

.form-success { text-align: center; padding: var(--space-12) var(--space-8); display: flex; flex-direction: column; align-items: center; gap: var(--space-4); }
.success-icon { width: 72px; height: 72px; color: #16a34a; animation: successPop .5s cubic-bezier(.34,1.56,.64,1); }
@keyframes successPop { from { transform:scale(.5); opacity:0; } to { transform:scale(1); opacity:1; } }
.form-success h3 { font-size: var(--text-2xl); font-weight: 700; color: var(--gray-900); }
.form-success p  { font-size: var(--text-base); color: var(--gray-600); }
.success-ref { font-size: var(--text-sm); color: var(--gray-500); }
.success-ref strong { color: var(--blue-600); }

/* ============================================================
   FOOTER
============================================================ */
.footer { background: var(--dark-900); border-top: 1px solid var(--border-dark); padding-top: var(--space-16); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: var(--space-8); margin-bottom: var(--space-12); }
.footer-brand .nav-logo { margin-bottom: var(--space-4); }
.footer-brand p { font-size: var(--text-sm); color: var(--gray-500); line-height: 1.7; margin-bottom: var(--space-5); max-width: 260px; }
.social-links { display: flex; gap: var(--space-3); }
.social-link { width: 36px; height: 36px; border: 1.5px solid var(--border-dark); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; color: var(--gray-500); transition: border-color var(--trans-fast), color var(--trans-fast), background var(--trans-fast); }
.social-link svg { width: 16px; height: 16px; }
.social-link:hover { border-color: var(--blue-500); color: var(--blue-400); background: rgba(37,99,235,.08); }
.footer-col h4 { font-size: var(--text-xs); font-weight: 700; color: var(--white); text-transform: uppercase; letter-spacing: .1em; margin-bottom: var(--space-5); }
.footer-col ul { display: flex; flex-direction: column; gap: var(--space-3); }
.footer-col li, .footer-col a { font-size: var(--text-sm); color: var(--gray-500); transition: color var(--trans-fast); }
.footer-col a:hover { color: var(--white); }
.footer-bottom { border-top: 1px solid var(--border-dark); padding-block: var(--space-6); display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap; }
.footer-bottom p { font-size: var(--text-sm); color: var(--gray-600); }
.footer-legal { display: flex; gap: var(--space-6); }
.footer-legal a { font-size: var(--text-sm); color: var(--gray-600); transition: color var(--trans-fast); }
.footer-legal a:hover { color: var(--gray-300); }

/* ============================================================
   SCROLL REVEAL
============================================================ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
@media (max-width: 768px) { .reveal { opacity: 1 !important; transform: none !important; transition: none !important; } }
.showcase-grid .reveal:nth-child(2) { transition-delay: .1s; }
.showcase-grid .reveal:nth-child(3) { transition-delay: .2s; }
.industries-grid .reveal:nth-child(2) { transition-delay: .1s; }
.industries-grid .reveal:nth-child(3) { transition-delay: .2s; }
.industries-grid .reveal:nth-child(4) { transition-delay: .3s; }
.process-steps .reveal:nth-child(2) { transition-delay: .1s; }
.process-steps .reveal:nth-child(3) { transition-delay: .2s; }
.process-steps .reveal:nth-child(4) { transition-delay: .3s; }

/* ============================================================
   RESPONSIVE
============================================================ */
@media (max-width: 1100px) {
  .sc-card, .sc-card:nth-child(even) { grid-template-columns: 1fr; direction: ltr; }
  .sc-visual { border-right: none; border-bottom: 1px solid var(--border-dark); min-height: 280px; }
  .sc-card:nth-child(even) .sc-visual { border-left: none; border-bottom: 1px solid var(--border-dark); }
  .trust-inner { grid-template-columns: 1fr; }
}

@media (max-width: 1024px) {
  .about-grid   { grid-template-columns: 1fr; gap: var(--space-12); }
  .contact-grid { grid-template-columns: 1fr; gap: var(--space-10); }
  .footer-grid  { grid-template-columns: 1fr 1fr; }
  .footer-brand, .footer-col:last-child { grid-column: 1 / -1; }
  .nav-links    { display: none; }
  .nav-cta      { display: none; }
  .hamburger    { display: flex; }
  .stab-layout  { grid-template-columns: 1fr; }
  .stab-visual  { border-right: none; border-bottom: 1px solid var(--border-dark); }
  .process-steps { grid-template-columns: 1fr 1fr; }
  .process-line { display: none; }
}

@media (max-width: 768px) {
  :root { --nav-h: 60px; }
  .hero-title { font-size: clamp(2rem, 10vw, 3rem); }
  .hero-stats { flex-direction: row; flex-wrap: wrap; gap: var(--space-4); padding: var(--space-4) var(--space-5); }
  .stat-divider { display: none; }
  .hero-actions { flex-direction: column; }
  .btn-lg { width: 100%; justify-content: center; }
  .stab-nav { flex-direction: column; }
  .stab-btn { min-width: unset; }
  .certifications { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .footer-legal { flex-wrap: wrap; gap: var(--space-4); }
}

@media (max-width: 640px) {
  .showcase-grid { gap: var(--space-5); }
  .sc-info { padding: var(--space-6); }
  .sc-spec-row { flex-direction: column; gap: var(--space-3); }
  .sc-spec { border-right: none; border-bottom: 1px solid var(--border-dark); padding-bottom: var(--space-2); }
  .sc-spec:last-child { border-bottom: none; }
  .cap-cards-grid { grid-template-columns: 1fr 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .industries-grid { grid-template-columns: 1fr; }
  .section-header { margin-bottom: var(--space-10); }
  .contact-form-wrap { padding: var(--space-5); }
}

/* ── Mobile performance ──────────────────────────────────────── */
@media (max-width: 768px) {
  /* Remove GPU-heavy hero blur glows entirely */
  .hero-glow { display: none; }
  /* Replace backdrop-filter with solid fallback (blur is ~10× more expensive on mobile) */
  #navbar { backdrop-filter: none; -webkit-backdrop-filter: none; background: rgba(3,8,16,.98); }
  .btn-ghost { backdrop-filter: none; -webkit-backdrop-filter: none; }
  /* SVG animations that use filter:drop-shadow cause repaint every frame — disable */
  .led-pulse { animation: none; opacity: .85; filter: none; }
  .gdt-spark { animation: none; opacity: .7; filter: none; }
  /* Show PCB/service SVG traces immediately on mobile — in-view never fires on tall cards */
  .pcb-trace, .svc-trace { stroke-dashoffset: 0; }
}

/* ── Reduced motion ──────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
  .marquee-track { animation: none; }
}

/* ── Print ───────────────────────────────────────────────────── */
@media print {
  #navbar, .hero-scroll, .mobile-menu, .mobile-overlay, #circuitCanvas, .marquee-section { display: none; }
  .hero { min-height: auto; padding-top: 0; }
}