/* CT-003 AMCUR Electrical — page-local Design Gate Shell C
   Phone-first thin: bold typography mark, no photo assets
   Palette: near-black + volt yellow (NOT Zalin orange/charcoal kit)
   Fonts: Space Grotesk (display) + Inter (body) */

:root {
  --ink: #0b0b0b;
  --volt: #e8f04a;
  --volt-hover: #d4dc3a;
  --muted: #6b6b6b;
  --line: #e8e8e8;
  --soft: #f6f6f4;
  --white: #ffffff;
  --radius: 12px;
  --banner-h: 36px;
  --cta-bar-h: 64px;
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --max: 920px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--ink);
  background: var(--white);
  padding-bottom: calc(var(--cta-bar-h) + 1rem);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--ink); text-decoration-thickness: 1.5px; text-underline-offset: 3px; }
a:hover { color: #444; }
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ink);
  line-height: 1.08;
  margin: 0 0 0.6rem;
}
p { margin: 0 0 0.85rem; }
.wrap {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.demo-banner {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: var(--volt);
  text-align: center;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.55rem 1rem;
  min-height: var(--banner-h);
}

.topbar {
  position: sticky;
  top: var(--banner-h);
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 1rem;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar-brand {
  text-decoration: none;
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.03em;
}
.topbar-brand span { color: var(--muted); font-weight: 500; font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; margin-left: 0.4rem; }
.topbar-actions { display: flex; gap: 0.5rem; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  border: 1.5px solid transparent;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--volt);
  color: var(--ink);
}
.btn-primary:hover {
  background: var(--volt-hover);
  color: var(--ink);
}
.btn-secondary {
  background: var(--ink);
  color: var(--white);
}
.btn-secondary:hover {
  background: #222;
  color: var(--white);
}
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-lg {
  padding: 0.95rem 1.5rem;
  font-size: 1.05rem;
}

/* Shell C — typography hero */
.hero-thin {
  padding: 3.5rem 0 3rem;
  background: var(--ink);
  color: var(--white);
  /* Extra top so sticky banner + topbar don't clip H1 */
  padding-top: 3.75rem;
}
.hero-thin .mark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(3.5rem, 16vw, 7.5rem);
  line-height: 0.9;
  letter-spacing: -0.05em;
  color: var(--volt);
  margin: 0 0 1.25rem;
}
.hero-kicker {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 1rem;
}
.hero-thin h1 {
  color: var(--white);
  font-size: clamp(1.65rem, 4.5vw, 2.4rem);
  max-width: 16ch;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.85rem;
}
.hero-lead {
  color: rgba(255, 255, 255, 0.72);
  max-width: 40ch;
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
}
.hero-meta {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.5);
}

section { padding: 2.75rem 0; }
section.soft { background: var(--soft); }
.section-title {
  font-size: clamp(1.35rem, 3vw, 1.7rem);
  margin-bottom: 0.35rem;
}
.section-sub {
  color: var(--muted);
  max-width: 48ch;
  margin-bottom: 1.5rem;
}

.services {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}
.services li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.85rem;
  align-items: start;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}
.services li:last-child { border-bottom: 0; }
.services .num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  padding-top: 0.15rem;
}
.services strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 650;
  margin-bottom: 0.2rem;
}
.services span {
  color: var(--muted);
  font-size: 0.95rem;
}

.fact-grid {
  display: grid;
  gap: 0.85rem;
  grid-template-columns: 1fr;
}
@media (min-width: 560px) {
  .fact-grid { grid-template-columns: 1fr 1fr; }
}
.fact {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.3rem;
}
.fact h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  font-weight: 600;
  margin-bottom: 0.45rem;
}
.fact p { margin: 0; font-family: var(--font-display); font-weight: 600; font-size: 1.05rem; }
.fact a { text-decoration: none; border-bottom: 1.5px solid var(--volt); }

.honest {
  font-size: 0.9rem;
  color: var(--muted);
  border-left: 3px solid var(--volt);
  padding-left: 1rem;
  margin-top: 1.5rem;
}

.cta-band {
  background: var(--ink);
  color: var(--white);
  text-align: center;
}
.cta-band .section-title { color: var(--white); }
.cta-band .section-sub { color: rgba(255,255,255,0.6); margin-inline: auto; }
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem;
  margin-top: 1.25rem;
}

.site-foot {
  padding: 1.5rem 0 2rem;
  font-size: 0.875rem;
  color: var(--muted);
  text-align: center;
  border-top: 1px solid var(--line);
}

.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 95;
  display: flex;
  gap: 0.5rem;
  padding: 0.65rem 0.85rem calc(0.65rem + env(safe-area-inset-bottom, 0px));
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--line);
  box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.08);
}
.sticky-cta .btn { flex: 1; }
@media (min-width: 860px) {
  .sticky-cta { display: none; }
  body { padding-bottom: 0; }
}