/* ============================================================
   First Signs Health — shared styles
   Intercom-inspired warm-cream system, original brand.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter+Tight:wght@300;400;500;600&family=Source+Serif+4:ital,wght@0,300;0,400;1,400&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --c-cream: #faf9f6;
  --c-cream-2: #f3f1eb;
  --c-ink: #111111;
  --c-ink-80: #313130;
  --c-ink-60: #626260;
  --c-ink-50: #7b7b78;
  --c-ink-30: #9c9fa5;
  --c-oat: #dedbd6;
  --c-oat-soft: #ebe8e2;
  --c-fin: #ff5600;
  --c-fin-soft: #ffe7d9;
  --c-flag: #c41c1c;
  --c-good: #0e7a3a;
  --c-amber: #b8860b;
  --c-white: #ffffff;

  --r-btn: 4px;
  --r-card: 8px;
  --r-pill: 999px;

  --f-sans: "Inter Tight", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --f-serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --f-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--f-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--c-ink);
  background: var(--c-cream);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "cv11";
}

a { color: var(--c-ink); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; text-decoration-color: var(--c-oat); }
a:hover { text-decoration-color: var(--c-ink); }

::selection { background: var(--c-fin); color: var(--c-white); }

/* ===== Type scale (Saans-style: 1.00 line-height + tight tracking) ===== */
.t-display    { font: 400 80px/1.00 var(--f-sans); letter-spacing: -2.4px; }
.t-h1         { font: 400 56px/1.00 var(--f-sans); letter-spacing: -1.6px; }
.t-h2         { font: 400 40px/1.00 var(--f-sans); letter-spacing: -1.2px; }
.t-h3         { font: 400 32px/1.02 var(--f-sans); letter-spacing: -0.96px; }
.t-h4         { font: 500 24px/1.05 var(--f-sans); letter-spacing: -0.48px; }
.t-lede       { font: 400 22px/1.35 var(--f-sans); letter-spacing: -0.4px; color: var(--c-ink-80); }
.t-body       { font: 400 18px/1.55 var(--f-sans); letter-spacing: -0.18px; color: var(--c-ink-80); }
.t-small      { font: 400 14px/1.5 var(--f-sans); letter-spacing: -0.1px; color: var(--c-ink-50); }
.t-mono-label { font: 500 12px/1.0 var(--f-mono); letter-spacing: 1.2px; text-transform: uppercase; color: var(--c-ink-60); }

/* ===== Nav ===== */
.fs-nav {
  position: sticky; top: 0; z-index: 100;
  background: var(--c-cream);
  border-bottom: 1px solid var(--c-oat);
}
.fs-nav-inner {
  max-width: 1200px; margin: 0 auto;
  padding: 14px 28px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
}
.fs-brand {
  display: flex; align-items: center; gap: 10px;
  white-space: nowrap;
  font: 500 17px/1 var(--f-sans);
  letter-spacing: -0.34px;
  color: var(--c-ink);
  text-decoration: none;
}
.fs-brand-mark {
  width: 28px; height: 28px;
  background: url("assets/logo-mark.png") center/contain no-repeat;
  display: inline-block;
  flex-shrink: 0;
  font-size: 0;          /* hide the legacy "F" text inside */
  color: transparent;
  border-radius: 0;
}
.fs-nav-links {
  display: flex; align-items: center; gap: 4px;
}
.fs-nav-links a {
  font: 400 15px/1 var(--f-sans);
  letter-spacing: -0.15px;
  padding: 8px 12px;
  border-radius: 6px;
  text-decoration: none;
  color: var(--c-ink-80);
}
.fs-nav-links a:hover { background: var(--c-oat-soft); color: var(--c-ink); }
.fs-nav-links a.is-current:not(.fs-nav-cta) { color: var(--c-ink); }

.fs-nav-links a.fs-nav-cta {
  font: 400 15px/1 var(--f-sans); letter-spacing: -0.15px;
  background: var(--c-ink); color: var(--c-white);
  padding: 9px 14px; border-radius: var(--r-btn);
  text-decoration: none;
  transition: transform .18s ease;
  display: inline-flex; align-items: center; gap: 8px;
}
.fs-nav-links a.fs-nav-cta:hover { background: var(--c-ink); color: var(--c-white); transform: scale(1.06); }
.fs-nav-cta::after {
  content: "→";
  font: 500 15px/1 var(--f-sans);
}

@media (max-width: 720px) {
  .fs-nav-inner { padding: 12px 16px; }
  .fs-nav-links { gap: 0; }
  .fs-nav-links a { padding: 6px 8px; font-size: 14px; }
  .fs-nav-cta { padding: 8px 12px; font-size: 14px; }
}

/* ===== Buttons ===== */
.fs-btn {
  display: inline-flex; align-items: center; gap: 8px;
  font: 400 16px/1.2 var(--f-sans); letter-spacing: -0.16px;
  padding: 12px 18px;
  border-radius: var(--r-btn);
  border: 1px solid transparent;
  background: var(--c-ink); color: var(--c-white);
  cursor: pointer; text-decoration: none;
  transition: transform .18s ease, background .18s ease, color .18s ease;
}
.fs-btn:hover { transform: scale(1.06); background: var(--c-ink); color: var(--c-white); }
.fs-btn:active { transform: scale(0.96); }
.fs-btn::after { content: "→"; font: 500 16px/1 var(--f-sans); transition: transform .18s ease; }
.fs-btn:hover::after { transform: translateX(2px); }

.fs-btn-outline {
  background: transparent; color: var(--c-ink);
  border: 1px solid var(--c-ink);
}
.fs-btn-outline:hover { background: var(--c-ink); color: var(--c-white); }

.fs-btn-ghost {
  background: transparent; color: var(--c-ink); border: 1px solid var(--c-oat);
}
.fs-btn-ghost:hover { background: var(--c-oat-soft); color: var(--c-ink); }

.fs-btn-fin { background: var(--c-fin); color: var(--c-white); }
.fs-btn-fin:hover { background: var(--c-fin); color: var(--c-white); }

.fs-btn-small {
  font-size: 14px; padding: 8px 14px;
}

.fs-btn-no-arrow::after { content: none; }

/* ===== Footer ===== */
.fs-footer {
  border-top: 1px solid var(--c-oat);
  background: var(--c-cream);
  padding: 64px 28px 48px;
  margin-top: 80px;
}
.fs-footer-inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px;
}
.fs-foot-brand {
  font: 500 17px/1 var(--f-sans); letter-spacing: -0.34px;
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 16px;
}
.fs-foot-tag {
  font: 400 14px/1.5 var(--f-sans); letter-spacing: -0.1px;
  color: var(--c-ink-60); max-width: 280px;
}
.fs-foot-h {
  font: 500 12px/1 var(--f-mono); letter-spacing: 1.2px; text-transform: uppercase;
  color: var(--c-ink-50); margin-bottom: 14px;
}
.fs-foot-list { list-style: none; }
.fs-foot-list li { margin-bottom: 8px; }
.fs-foot-list a {
  font: 400 14px/1.4 var(--f-sans); letter-spacing: -0.1px;
  color: var(--c-ink-80); text-decoration: none;
}
.fs-foot-list a:hover { color: var(--c-ink); text-decoration: underline; text-decoration-color: var(--c-ink-50); }
.fs-foot-bottom {
  max-width: 1200px; margin: 48px auto 0;
  padding-top: 24px; border-top: 1px solid var(--c-oat);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font: 400 12px/1.4 var(--f-mono); letter-spacing: 0.6px; text-transform: uppercase;
  color: var(--c-ink-50);
}

@media (max-width: 800px) {
  .fs-footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
  .fs-foot-bottom { font-size: 11px; }
}
@media (max-width: 480px) {
  .fs-footer-inner { grid-template-columns: 1fr; }
}

/* ===== Layout helpers ===== */
.fs-wrap { max-width: 1200px; margin: 0 auto; padding: 0 28px; }
.fs-wrap-narrow { max-width: 760px; margin: 0 auto; padding: 0 28px; }

@media (max-width: 720px) {
  .fs-wrap, .fs-wrap-narrow { padding: 0 18px; }
}

/* ===== Reusable card ===== */
.fs-card {
  background: var(--c-white);
  border: 1px solid var(--c-oat);
  border-radius: var(--r-card);
  padding: 28px;
}

/* ===== Mono eyebrow tag ===== */
.fs-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font: 500 12px/1 var(--f-mono); letter-spacing: 1.2px; text-transform: uppercase;
  color: var(--c-ink-60);
}
.fs-eyebrow::before {
  content: ""; display: block; width: 6px; height: 6px;
  background: var(--c-fin); border-radius: 50%;
}

/* ===== Tighter responsive type ===== */
@media (max-width: 900px) {
  .t-display { font-size: 60px; letter-spacing: -1.8px; }
  .t-h1 { font-size: 44px; letter-spacing: -1.3px; }
  .t-h2 { font-size: 32px; letter-spacing: -1px; }
  .t-h3 { font-size: 26px; letter-spacing: -0.8px; }
  .t-lede { font-size: 19px; }
}
@media (max-width: 560px) {
  .t-display { font-size: 44px; letter-spacing: -1.3px; }
  .t-h1 { font-size: 34px; letter-spacing: -1px; }
  .t-h2 { font-size: 28px; letter-spacing: -0.85px; }
  .t-h3 { font-size: 22px; letter-spacing: -0.6px; }
}