/* StoneLabs Technologies — shared styles. Monochrome: black, white, gray. No color accent. */

:root {
  --black: #0a0a0a;
  --near-black: #141414;
  --charcoal: #1f1f22;
  --gray-900: #2b2b2f;
  --gray-700: #4b4b52;
  --gray-500: #74747c;
  --gray-300: #c9c9cf;
  --gray-200: #e3e3e7;
  --gray-100: #f1f1f3;
  --white: #ffffff;

  --text-primary: var(--black);
  --text-secondary: var(--gray-700);
  --text-on-dark: #ffffff;
  --text-on-dark-secondary: #b7b7bd;

  --border: var(--gray-200);
  --max-width: 1080px;

  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 9px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text-primary);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

a { color: inherit; text-decoration: none; }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.wordmark {
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 9px;
}
.wordmark .mark {
  width: 22px;
  height: 22px;
  display: inline-block;
  flex: none;
  background-color: var(--black);
  -webkit-mask-image: url(assets/stonelabs_mark.svg);
  mask-image: url(assets/stonelabs_mark.svg);
  -webkit-mask-size: contain;
  mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 32px;
  margin: 0;
  padding: 0;
}
.nav-links a {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text-secondary);
}
.nav-links a:hover { color: var(--text-primary); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 14.5px;
  padding: 11px 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary {
  background: var(--black);
  color: var(--white);
}
.btn-primary:hover { background: var(--near-black); }
.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--gray-300);
}
.btn-ghost:hover { border-color: var(--gray-700); }

/* ---------- Hero ---------- */
.hero {
  background: var(--black);
  color: var(--text-on-dark);
  padding: 110px 0 100px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.045) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, black 40%, transparent 85%);
}
.hero .container { position: relative; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-on-dark-secondary);
  border: 1px solid rgba(255,255,255,0.18);
  padding: 6px 14px;
  border-radius: 999px;
}
.hero h1 {
  font-size: clamp(34px, 5.4vw, 58px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 22px 0 18px;
  max-width: 760px;
}
.hero .lede {
  font-size: 17.5px;
  color: var(--text-on-dark-secondary);
  max-width: 560px;
  margin: 0 0 32px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero .btn-ghost {
  color: var(--white);
  border-color: rgba(255,255,255,0.28);
}
.hero .btn-ghost:hover { border-color: rgba(255,255,255,0.6); }
.hero .btn-primary {
  background: var(--white);
  color: var(--black);
}
.hero .btn-primary:hover { background: var(--gray-100); }

/* ---------- Sections ---------- */
section { padding: 88px 0; }
.section-head { max-width: 620px; margin-bottom: 48px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head .eyebrow {
  border-color: var(--gray-300);
  color: var(--text-secondary);
}
.section-head h2 {
  font-size: clamp(26px, 3.2vw, 36px);
  letter-spacing: -0.015em;
  margin: 16px 0 12px;
  font-weight: 800;
}
.section-head p { color: var(--text-secondary); font-size: 16px; }

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: start;
}
.about-copy p {
  font-size: 16.5px;
  color: var(--text-secondary);
  margin: 0 0 16px;
}
.about-facts {
  display: grid;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.about-facts .fact {
  background: var(--white);
  padding: 18px 20px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 14.5px;
}
.about-facts .fact span:first-child {
  color: var(--text-secondary);
  font-weight: 600;
}
.about-facts .fact span:last-child {
  font-weight: 700;
  text-align: right;
}

/* ---------- Product card ---------- */
.product-card {
  background: var(--black);
  color: var(--white);
  border-radius: var(--radius-lg);
  padding: 44px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 28px;
  align-items: center;
}
.product-card .tile {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  background: var(--white);
  color: var(--black);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 26px;
  flex: none;
}
.product-card h3 {
  font-size: 23px;
  margin: 0 0 6px;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.product-card p {
  margin: 0;
  color: var(--text-on-dark-secondary);
  font-size: 15px;
  max-width: 520px;
}
.product-card .status {
  display: inline-block;
  margin-top: 14px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--gray-300);
  border: 1px solid rgba(255,255,255,0.22);
  padding: 5px 12px;
  border-radius: 999px;
}

/* ---------- Contact ---------- */
.contact {
  background: var(--gray-100);
  border-radius: var(--radius-lg);
  padding: 56px;
  text-align: center;
}
.contact h2 { font-size: 27px; font-weight: 800; margin: 0 0 10px; letter-spacing: -0.01em; }
.contact p { color: var(--text-secondary); font-size: 16px; margin: 0 0 26px; }
.contact-email {
  font-size: 19px;
  font-weight: 700;
  display: inline-block;
  padding-bottom: 2px;
  border-bottom: 2px solid var(--black);
}

/* ---------- Footer ---------- */
footer {
  background: var(--black);
  color: var(--text-on-dark-secondary);
  padding: 48px 0 28px;
}
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
footer .wordmark { color: var(--white); }
footer .wordmark .mark { background-color: var(--white); }
.footer-links { display: flex; gap: 48px; }
.footer-links h4 {
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gray-500);
  margin: 0 0 14px;
}
.footer-links ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer-links a { font-size: 14.5px; color: var(--text-on-dark-secondary); }
.footer-links a:hover { color: var(--white); }
.footer-bottom {
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13.5px;
  color: var(--gray-500);
}

@media (max-width: 760px) {
  .nav-links { display: none; }
  .about-grid { grid-template-columns: 1fr; }
  .product-card { grid-template-columns: 1fr; text-align: left; }
  .contact { padding: 36px 24px; }
}

/* ---------- Legal pages (privacy / support) ---------- */
.legal-hero {
  background: var(--black);
  color: var(--white);
  padding: 64px 0 48px;
}
.legal-hero .eyebrow { border-color: rgba(255,255,255,0.22); color: var(--text-on-dark-secondary); }
.legal-hero h1 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.015em;
  margin: 16px 0 8px;
}
.legal-hero .updated { color: var(--text-on-dark-secondary); font-size: 14.5px; }

.legal-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 24px 100px;
}
.legal-body h2 {
  font-size: 20px;
  font-weight: 800;
  margin: 40px 0 12px;
  letter-spacing: -0.01em;
}
.legal-body h2:first-child { margin-top: 0; }
.legal-body p, .legal-body li {
  font-size: 15.5px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.legal-body ul { padding-left: 20px; margin: 10px 0; }
.legal-body li { margin-bottom: 6px; }
.legal-body strong { color: var(--text-primary); }
.legal-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
  font-size: 14.5px;
}
.legal-body th, .legal-body td {
  text-align: left;
  padding: 10px 12px;
  border: 1px solid var(--border);
  vertical-align: top;
}
.legal-body th {
  background: var(--gray-100);
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
}
.callout {
  background: var(--gray-100);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  margin: 18px 0;
  font-size: 14.5px;
  color: var(--text-secondary);
}
.legal-nav {
  display: flex;
  gap: 24px;
  margin-top: 8px;
}
.legal-nav a { font-size: 14px; font-weight: 700; color: var(--text-on-dark-secondary); border-bottom: 1px solid rgba(255,255,255,0.3); padding-bottom: 2px; }
.legal-nav a.active, .legal-nav a:hover { color: var(--white); border-color: var(--white); }

.faq-item { margin-bottom: 28px; }
.faq-item h2 { margin-top: 0; margin-bottom: 8px; }

.back-home {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.back-home:hover { color: var(--text-primary); }