:root {
  /* Color — dark industrial with electric green */
  --bg-primary: #0a0a0a;
  --bg-secondary: #0f0f0f;
  --bg-elevated: #141414;
  --fg-primary: #f5f5f5;
  --fg-secondary: rgba(245, 245, 245, 0.6);
  --fg-tertiary: rgba(245, 245, 245, 0.4);
  --accent: #00d96b;        /* primary CTA + highlights */
  --accent-hover: #00ff7e;
  --warn: #ffb800;          /* "in stock" badges */
  --danger: #ff4444;        /* form errors */
  --border: rgba(255, 255, 255, 0.05);
  --border-strong: rgba(255, 255, 255, 0.1);

  /* Typography */
  --font-display: 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Type scale — clamp() responsive */
  --text-xs: clamp(0.75rem, 0.7rem + 0.2vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.3vw, 1rem);
  --text-base: clamp(1rem, 0.9rem + 0.4vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.5vw, 1.25rem);
  --text-xl: clamp(1.5rem, 1.3rem + 0.8vw, 2rem);
  --text-2xl: clamp(2rem, 1.6rem + 1.6vw, 3rem);
  --text-3xl: clamp(2.5rem, 2rem + 2.5vw, 4.5rem);

  /* Spacing — 8px grid */
  --space-1: 0.5rem;   --space-2: 1rem;
  --space-3: 1.5rem;   --space-4: 2rem;
  --space-6: 3rem;     --space-8: 4rem;
  --space-12: 6rem;    --space-16: 8rem;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Shadow — multi-layer */
  --shadow-card: 0 1px 2px rgba(0,0,0,0.4), 0 4px 16px rgba(0,0,0,0.3);
  --shadow-elevated: 0 4px 8px rgba(0,0,0,0.4), 0 16px 48px rgba(0,0,0,0.5);
  --shadow-accent: 0 0 0 1px rgba(0, 217, 107, 0.3), 0 8px 32px rgba(0, 217, 107, 0.15);
}

body {
  background-color: var(--bg-primary);
  color: var(--fg-primary);
  font-family: var(--font-body);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
}

.text-accent { color: var(--accent); }
.bg-accent { background-color: var(--accent); }
.hover\:bg-accent-hover:hover { background-color: var(--accent-hover); }

/* Animation Utils */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .fade-up {
    transform: none;
    transition: opacity 0.6s ease-out;
  }
}

/* Base Form Input Enhancements */
.input-field { background: #1a1a1a; border: 1px solid var(--border-strong); transition: all 0.2s; }
.input-field:focus { border-color: var(--accent); outline: none; background: #222; }

.accent-glow { box-shadow: 0 0 20px rgba(0, 217, 107, 0.15); }

input, select, textarea {
  transition: border-color 0.2s ease-in-out;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}

/* ============================================================
   Premium polish layer
   ============================================================ */

/* Eyebrow chip */
.eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--font-mono);font-size:.68rem;letter-spacing:.2em;text-transform:uppercase;color:var(--accent);padding:.4rem .85rem;border:1px solid rgba(0,217,107,.25);border-radius:999px;background:rgba(0,217,107,.06)}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:999px;background:var(--accent);box-shadow:0 0 10px var(--accent)}

/* Ambient radial glow behind a section */
.amb{position:relative;isolation:isolate}
.amb::before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;background:radial-gradient(48rem 24rem at 80% -14%,rgba(0,217,107,.08),transparent 62%)}

/* Subtle glow inside the Why section */
#why{position:relative;overflow:hidden}
#why::after{content:"";position:absolute;top:-25%;left:-8%;width:42rem;height:42rem;border-radius:999px;background:radial-gradient(circle,rgba(0,217,107,.06),transparent 60%);pointer-events:none;z-index:0}
#why > .max-w-7xl{position:relative;z-index:1}

/* Shimmer sweep on primary green buttons */
a.bg-accent,button.bg-accent{position:relative;overflow:hidden}
a.bg-accent::after,button.bg-accent::after{content:"";position:absolute;top:0;left:-160%;width:55%;height:100%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.4),transparent);transform:skewX(-20deg);pointer-events:none}
a.bg-accent:hover::after,button.bg-accent:hover::after{animation:shimmer .9s ease}
@keyframes shimmer{to{left:160%}}

/* Card hover micro-interactions (scoped to content sections) */
#why .bg-bgSecondary,
#compute-1u .bg-bgElevated,#performance-2u .bg-bgElevated,#amd-epyc .bg-bgElevated,#gpu .bg-bgElevated,#storage .bg-bgElevated,
#testimonials .splide__slide > div{
  transition:transform .35s cubic-bezier(.22,1,.36,1),border-color .35s ease,box-shadow .35s ease;
}
#why .bg-bgSecondary:hover{transform:translateY(-6px);border-color:rgba(0,217,107,.4);box-shadow:var(--shadow-accent)}
#why .bg-bgSecondary:hover .text-accent{filter:drop-shadow(0 0 8px rgba(0,217,107,.55))}
#compute-1u .bg-bgElevated:hover,#performance-2u .bg-bgElevated:hover,#amd-epyc .bg-bgElevated:hover,#gpu .bg-bgElevated:hover,#storage .bg-bgElevated:hover{border-color:rgba(0,217,107,.3);box-shadow:0 0 0 1px rgba(0,217,107,.12),0 12px 40px rgba(0,0,0,.45)}
#testimonials .splide__slide > div:hover{transform:translateY(-4px);border-color:rgba(0,217,107,.3)}
#faq .bg-bgSecondary{transition:border-color .25s ease}
#faq .bg-bgSecondary:hover{border-color:rgba(0,217,107,.3)}

/* ===== Comparison matrix ===== */
.cmp{border:1px solid var(--border-strong);border-radius:var(--radius-lg);background:var(--bg-secondary);box-shadow:var(--shadow-card)}
.cmp-head,.cmp-row{display:grid;grid-template-columns:1.3fr 1.15fr 1fr 1fr}
.cmp-row{border-top:1px solid var(--border)}
.cmp-head > div{padding:1.1rem 1rem;text-align:center;font-weight:600;font-size:.88rem;color:var(--fg-secondary)}
.cmp-head .lead{padding:0}
.cmp-head .cmp-col-ss{color:var(--fg-primary);background:rgba(0,217,107,.1);border:1px solid rgba(0,217,107,.4);border-bottom:none;border-radius:14px 14px 0 0;font-size:1.05rem;font-weight:700}
.cmp-head .cmp-col-ss span{display:block;font-family:var(--font-mono);font-size:.64rem;color:var(--accent);font-weight:500;margin-top:.3rem;letter-spacing:.04em}
.cmp-row > div{padding:1rem;text-align:center;font-size:.9rem;color:var(--fg-secondary);display:flex;align-items:center;justify-content:center;gap:.5rem;line-height:1.35}
.cmp-label{justify-content:flex-start!important;text-align:left!important;color:var(--fg-secondary);font-weight:500}
.cmp-ss{color:var(--fg-primary);font-weight:600;background:rgba(0,217,107,.05);border-left:1px solid rgba(0,217,107,.4);border-right:1px solid rgba(0,217,107,.4)}
.cmp-ss::before{content:"✓";color:var(--accent);font-weight:800;flex:none}
.cmp-row:last-child .cmp-ss{border-bottom:1px solid rgba(0,217,107,.4);border-radius:0 0 14px 14px}
.cmp-row:hover{background:rgba(255,255,255,.025)}

@media (max-width:768px){
  .cmp{background:transparent;border:none;box-shadow:none;display:flex;flex-direction:column;gap:1rem}
  .cmp-head{display:none}
  .cmp-row{grid-template-columns:1fr;border:1px solid var(--border-strong);border-radius:var(--radius-md);background:var(--bg-elevated);overflow:hidden}
  .cmp-row:hover{background:var(--bg-elevated)}
  .cmp-row > div{justify-content:space-between;text-align:right;padding:.7rem 1rem;border-top:1px solid var(--border)}
  .cmp-row > div[data-col]::before{content:attr(data-col);color:var(--fg-tertiary);font-family:var(--font-mono);font-size:.66rem;text-transform:uppercase;letter-spacing:.05em;text-align:left;margin-right:1rem;flex:none}
  .cmp-label{justify-content:flex-start!important;text-align:left!important;color:var(--fg-primary)!important;font-weight:700;font-size:1rem;background:rgba(0,217,107,.07);padding:.85rem 1rem!important;border-top:none}
  .cmp-ss{background:rgba(0,217,107,.06);border:none;border-left:3px solid var(--accent)}
  .cmp-ss::before{display:none}
}

/* ===== Hero datacenter background (adapted from v2) ===== */
.hero-bg{isolation:isolate}
.hero-bg::before{
  content:"";position:absolute;inset:0;z-index:-2;
  background:
    linear-gradient(90deg, rgba(10,10,10,.98) 0%, rgba(10,10,10,.84) 38%, rgba(10,10,10,.5) 72%, rgba(10,10,10,.88) 100%),
    linear-gradient(0deg, rgba(10,10,10,1) 0%, rgba(10,10,10,.2) 36%, rgba(10,10,10,.12) 100%),
    url("../assets/images/hero.webp") center / cover no-repeat;
}
.hero-bg::after{
  content:"";position:absolute;inset:auto 0 0;z-index:-1;height:32%;
  background:linear-gradient(180deg, rgba(10,10,10,0), var(--bg-primary));
}

/* ===== Brand trust marquee ===== */
.marquee{overflow:hidden;border-block:1px solid var(--border-strong);background:var(--bg-secondary);padding:1.15rem 0;-webkit-mask:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.marquee-track{display:flex;gap:3.5rem;width:max-content;align-items:center;animation:marquee 32s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
.marquee span{font-family:var(--font-mono);font-size:.95rem;letter-spacing:.02em;color:var(--fg-secondary);white-space:nowrap}
.marquee span b{color:var(--fg-primary);font-weight:700}
@keyframes marquee{to{transform:translateX(-50%)}}
@media (prefers-reduced-motion: reduce){.marquee-track{animation:none}}