/* QSX Power & Environment — qsx.cc.cd
   Professional B2B industrial-tech theme. No build step. */

:root {
  --navy-950: #0b1526;
  --navy-900: #0e1b2c;
  --navy-800: #14263f;
  --ink: #1d2b3f;
  --muted: #5b6b82;
  --bg: #ffffff;
  --bg-alt: #f3f6fa;
  --line: #e2e8f0;
  --accent: #0e9f8a;        /* teal */
  --accent-dark: #0b7d6d;
  --highlight: #f59e0b;     /* amber */
  --white: #ffffff;
  --radius: 10px;
  --shadow: 0 10px 30px rgba(11, 21, 38, 0.10);
  --font: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

h1, h2, h3 { line-height: 1.2; margin: 0 0 0.6rem; color: var(--navy-900); }
h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1rem; }

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin-bottom: 0.5rem;
}

.section { padding: 4.5rem 0; }
.section-alt { background: var(--bg-alt); }
.section-lead { max-width: 720px; color: var(--muted); font-size: 1.08rem; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 21, 38, 0.96);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
}

.brand { display: flex; align-items: center; gap: 0.7rem; text-decoration: none; }

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  font-weight: 800;
  letter-spacing: 0.04em;
  font-size: 0.95rem;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { color: #fff; font-size: 0.98rem; }
.brand-text small { color: #9fb0c6; font-size: 0.75rem; }

.main-nav { display: flex; align-items: center; gap: 1.6rem; }
.main-nav a {
  color: #d7e0ec;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}
.main-nav a:hover { color: #fff; }

.nav-cta {
  border: 1px solid var(--accent);
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  color: #fff !important;
  background: rgba(14, 159, 138, 0.15);
}
.nav-cta:hover { background: var(--accent); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 0.5rem;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
}

/* ===== Hero ===== */
.hero {
  background:
    radial-gradient(1100px 480px at 85% -10%, rgba(14, 159, 138, 0.22), transparent 60%),
    radial-gradient(900px 500px at 8% 110%, rgba(245, 158, 11, 0.12), transparent 60%),
    linear-gradient(180deg, var(--navy-950), var(--navy-900));
  color: #fff;
  padding: 5.5rem 0 4rem;
}

.hero-inner .eyebrow { color: var(--highlight); }
.hero h1 {
  color: #fff;
  font-size: clamp(2.2rem, 5.5vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
}
.hero .lead {
  max-width: 640px;
  color: #c3cfdf;
  font-size: 1.12rem;
  margin-bottom: 1.8rem;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-bottom: 2.8rem; }

.btn {
  display: inline-block;
  padding: 0.8rem 1.6rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.98rem;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.12s ease, background 0.15s ease, color 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }

.btn-outline { border-color: rgba(255, 255, 255, 0.35); color: #fff; }
.btn-outline:hover { border-color: #fff; background: rgba(255, 255, 255, 0.08); }

.btn-light { background: #fff; color: var(--navy-900); }
.btn-light:hover { background: #eef3f8; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 1.6rem;
}
.stat strong { display: block; font-size: 1.7rem; color: #fff; }
.stat span { color: #9fb0c6; font-size: 0.88rem; }

/* ===== Cards ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.4rem;
  margin-top: 2.2rem;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.8rem;
  box-shadow: var(--shadow);
}
.section-alt .card { box-shadow: none; }

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: linear-gradient(135deg, rgba(14, 159, 138, 0.14), rgba(14, 159, 138, 0.05));
  border: 1px solid rgba(14, 159, 138, 0.25);
  margin-bottom: 1rem;
}

.card ul { margin: 0.8rem 0 0; padding-left: 1.1rem; color: var(--muted); font-size: 0.95rem; }
.card li { margin-bottom: 0.35rem; }
.card p { color: var(--muted); }

/* ===== Opportunities ===== */
.opp-list { margin-top: 2.2rem; display: grid; gap: 1.2rem; }

.opp {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 1.2rem;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 5px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.6rem 1.8rem;
  box-shadow: var(--shadow);
}

.opp-num {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--accent);
  opacity: 0.85;
}
.opp p { color: var(--muted); margin-bottom: 0; }

/* ===== CTA band ===== */
.cta-band {
  background: linear-gradient(120deg, var(--navy-800), var(--navy-950));
  color: #fff;
  padding: 3.5rem 0;
}
.cta-inner { text-align: center; max-width: 700px; }
.cta-inner h2 { color: #fff; }
.cta-inner p { color: #c3cfdf; margin-bottom: 1.6rem; }

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 3rem;
  align-items: start;
}

.contact-points { list-style: none; padding: 0; margin: 1.5rem 0 0; }
.contact-points li {
  padding: 0.7rem 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
}
.contact-points strong { color: var(--ink); }

.contact-form {
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.8rem;
  display: grid;
  gap: 1rem;
}
.contact-form label { display: grid; gap: 0.35rem; font-size: 0.92rem; font-weight: 600; }
.contact-form input,
.contact-form select,
.contact-form textarea {
  font: inherit;
  font-weight: 400;
  padding: 0.7rem 0.85rem;
  border: 1px solid #cbd5e1;
  border-radius: 7px;
  background: #fff;
  width: 100%;
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: 2px solid rgba(14, 159, 138, 0.45);
  border-color: var(--accent);
}
.form-note { color: var(--accent-dark); font-size: 0.92rem; min-height: 1.4em; margin: 0; }

/* ===== Footer ===== */
.site-footer {
  background: var(--navy-950);
  color: #9fb0c6;
  padding: 2.8rem 0 2rem;
  font-size: 0.92rem;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1.5rem;
  align-items: start;
}
.footer-brand { display: flex; gap: 0.8rem; align-items: flex-start; }
.footer-brand p { margin: 0; }
.footer-brand strong { color: #fff; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 1.2rem; }
.footer-nav a { color: #9fb0c6; text-decoration: none; }
.footer-nav a:hover { color: #fff; }
.copyright { grid-column: 1 / -1; border-top: 1px solid rgba(255,255,255,0.1); padding-top: 1.2rem; margin: 0.5rem 0 0; font-size: 0.82rem; }

/* ===== Responsive ===== */
@media (max-width: 860px) {
  .card-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .main-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--navy-950);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.5rem 1.25rem 1rem;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 0.75rem 0; border-top: 1px solid rgba(255,255,255,0.08); }
  .main-nav a:first-child { border-top: 0; }
  .nav-cta { text-align: center; margin-top: 0.5rem; }

  .hero { padding: 4rem 0 3rem; }
  .hero-stats { grid-template-columns: 1fr; gap: 0.8rem; }
  .opp { grid-template-columns: 1fr; gap: 0.4rem; }
  .section { padding: 3.2rem 0; }
}