/* necktie labs — black and white only. Restraint is the point. */
@import url('https://fonts.googleapis.com/css2?family=Hanken+Grotesk:wght@400;500;600;700&display=swap');

:root {
  color-scheme: light;
  --ink: #000000;        /* text + marks on light */
  --paper: #ffffff;      /* backgrounds */
  --muted: #5b5b5b;      /* secondary text (UI gray, never the logo) */
  --faint: #8a8a8a;      /* tertiary text */
  --line: #e5e5e5;       /* hairlines */
  --line-strong: #cfcfcf;
  --panel: #f6f6f6;      /* subtle fill */
  --font-brand: 'Hanken Grotesk', system-ui, -apple-system, 'Segoe UI', Roboto,
    Helvetica, Arial, sans-serif;
  --wrap: 1080px;
  --pad: 24px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-brand);
  font-weight: 400;
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--ink); }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

h1, h2, h3 {
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0;
}

p { margin: 0 0 1rem; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
}

.nav .logo { display: inline-flex; align-items: center; }
.nav .logo img { height: 46px; width: auto; display: block; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}
.nav-links a:hover { color: var(--ink); }

/* ---------- Buttons ---------- */
.actions { display: flex; flex-wrap: wrap; gap: 12px; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1.5px solid var(--ink);
  font-weight: 500;
  font-size: 0.98rem;
  text-decoration: none;
  transition: opacity 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.button.primary { background: var(--ink); color: var(--paper); }
.button.primary:hover { opacity: 0.82; }
.button.secondary { background: transparent; color: var(--ink); }
.button.secondary:hover { background: var(--ink); color: var(--paper); }

/* On dark bands */
.band-dark .button.primary { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.band-dark .button.secondary { color: var(--paper); border-color: var(--paper); }
.band-dark .button.secondary:hover { background: var(--paper); color: var(--ink); }

/* ---------- Hero ---------- */
.hero { padding: 96px 0 80px; }
.eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 20px;
}
.hero h1 {
  max-width: 16ch;
  font-size: clamp(2.6rem, 6.2vw, 4.6rem);
  margin-bottom: 26px;
}
.hero .lede {
  max-width: 60ch;
  font-size: clamp(1.1rem, 2.1vw, 1.32rem);
  color: var(--muted);
  margin-bottom: 34px;
}

/* ---------- Generic section ---------- */
.section { padding: 72px 0; border-top: 1px solid var(--line); }
.section > .wrap > h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  max-width: 22ch;
  margin-bottom: 14px;
}
.section .section-lede {
  max-width: 64ch;
  color: var(--muted);
  font-size: 1.12rem;
  margin-bottom: 40px;
}

/* ---------- Dark thesis band ---------- */
.band-dark {
  background: var(--ink);
  color: var(--paper);
  padding: 80px 0;
}
.band-dark h2 { color: var(--paper); }
.band-dark .section-lede { color: rgba(255, 255, 255, 0.72); }

.principles {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.18);
}
.principle {
  background: var(--ink);
  padding: 28px 24px;
}
.principle .num {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 14px;
}
.principle h3 { color: var(--paper); font-size: 1.18rem; margin-bottom: 8px; }
.principle p { color: rgba(255, 255, 255, 0.72); font-size: 0.98rem; margin: 0; }

/* ---------- Product cards ---------- */
.products { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.product {
  border: 1px solid var(--line-strong);
  padding: 34px;
  display: flex;
  flex-direction: column;
}
.product .status {
  align-self: flex-start;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid var(--ink);
  margin-bottom: 18px;
}
.product .status.beta { color: var(--muted); border-color: var(--line-strong); }
.product h3 { font-size: 1.5rem; margin-bottom: 6px; }
.product .domain { color: var(--faint); font-size: 0.95rem; margin-bottom: 16px; }
.product p { color: var(--muted); margin-bottom: 18px; }
.product .product-foot { margin-top: auto; display: flex; flex-wrap: wrap; gap: 18px; align-items: center; }
.product .link {
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1.5px solid var(--ink);
  padding-bottom: 1px;
}
.product .link:hover { opacity: 0.7; }
.product .link.muted { color: var(--muted); border-color: var(--line-strong); }

/* ---------- Works-with chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  border: 1px solid var(--line-strong);
  padding: 9px 16px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--muted);
}

/* ---------- Trust list ---------- */
.facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 48px; }
.fact { border-top: 2px solid var(--ink); padding-top: 16px; }
.fact h3 { font-size: 1.12rem; margin-bottom: 6px; }
.fact p { color: var(--muted); margin: 0; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: start; }
.about-grid p { font-size: 1.12rem; color: var(--muted); }
.about-card { border: 1px solid var(--line); background: var(--panel); padding: 28px; }
.about-card dt { font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); margin-top: 16px; }
.about-card dt:first-child { margin-top: 0; }
.about-card dd { margin: 4px 0 0; font-weight: 500; }
.about-card dd a { color: var(--ink); }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink);
  color: var(--paper);
  padding: 64px 0 48px;
}
.footer-top { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 32px; align-items: flex-start; }
.site-footer .logo img { height: 42px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 24px; font-size: 0.95rem; }
.footer-links a { color: rgba(255, 255, 255, 0.78); text-decoration: none; }
.footer-links a:hover { color: var(--paper); }
.footer-bottom {
  margin-top: 44px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

/* ---------- Legal / policy pages ---------- */
.policy { max-width: 760px; padding: 72px 0; }
.policy .eyebrow { margin-bottom: 10px; }
.policy h1 { font-size: clamp(2rem, 5vw, 3rem); margin-bottom: 8px; }
.policy h2 {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 1.4rem;
}
.policy p, .policy li { color: var(--muted); }
.policy ul { padding-left: 22px; }
.policy a { color: var(--ink); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .principles { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .about-grid { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  body { font-size: 16px; }
  .nav-links { gap: 16px; font-size: 0.9rem; }
  .nav-links .hide-sm { display: none; }
  .hero { padding: 64px 0 56px; }
  .section { padding: 56px 0; }
  .products { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr; }
  .facts { grid-template-columns: 1fr; }
}