/* ============================================================
   Rook International — brochure site
   Brand tokens taken from the Rook Consultancy identity:
   teal #0091AF, navy #064462, steel #86A8B8, grey #8D9198,
   ink #3C3C3B, paper #f3f2f2.
   ============================================================ */

:root {
  --teal: #0091AF;
  --teal-deep: #0a7ba0;
  --navy: #064462;
  --steel: #86A8B8;
  --grey: #8D9198;
  --ink: #3C3C3B;
  --paper: #f3f2f2;
  --white: #ffffff;

  --brand-gradient: linear-gradient(118deg, #0091AF 0%, #0a7ba0 44%, #064462 100%);

  --font-heading: "Poppins", system-ui, -apple-system, Segoe UI, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, Segoe UI, sans-serif;

  --maxw: 1080px;
  --gutter: clamp(20px, 5vw, 48px);
  --radius: 14px;
  --shadow: 0 18px 40px -22px rgba(6, 68, 98, 0.45);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-heading);
  color: var(--navy);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0 0 0.5em;
}

h1 { font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 600; }
h3 { font-size: 1.2rem; font-weight: 600; }

p { margin: 0 0 1.1em; }
a { color: var(--teal); text-decoration: none; }
a:hover { color: var(--navy); }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--teal);
  margin: 0 0 1rem;
}
.eyebrow.on-dark { color: var(--steel); }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(1.2) blur(8px);
  border-bottom: 1px solid rgba(6, 68, 98, 0.08);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 14px;
}
.nav__logo img { display: block; height: 40px; width: auto; }
.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 30px);
  font-size: 0.95rem;
  font-weight: 500;
}
.nav__links a { color: var(--ink); white-space: nowrap; }
.nav__links a:hover { color: var(--teal); }
.nav__links a.is-active { color: var(--teal); }
.nav__cta {
  padding: 9px 18px;
  border-radius: 999px;
  background: var(--navy);
  color: var(--white) !important;
  font-weight: 600;
}
.nav__cta:hover { background: var(--teal); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-family: var(--font-body);
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn--solid { background: var(--white); color: var(--navy) !important; }
.btn--solid:hover { background: var(--paper); }
.btn--ghost {
  background: transparent;
  color: var(--white) !important;
  border: 1.5px solid rgba(255, 255, 255, 0.55);
}
.btn--ghost:hover { border-color: var(--white); }
.btn--navy { background: var(--navy); color: var(--white) !important; }
.btn--navy:hover { background: var(--teal); }

/* ---------- Hero ---------- */
.hero {
  background: var(--brand-gradient);
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  right: -6%;
  top: -20%;
  width: 46vmax;
  height: 46vmax;
  background: radial-gradient(closest-side, rgba(255,255,255,0.10), transparent 70%);
  pointer-events: none;
}
.hero__inner { padding-block: clamp(72px, 12vw, 132px); position: relative; z-index: 1; max-width: 760px; }
.hero h1 { color: var(--white); }
.hero__accent { color: rgba(255, 255, 255, 0.72); }
.hero p.lead {
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  color: rgba(255, 255, 255, 0.92);
  max-width: 46ch;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 1.6rem; }

/* page hero (interior pages) — slimmer */
.pagehero { background: var(--brand-gradient); color: var(--white); }
.pagehero__inner { padding-block: clamp(56px, 9vw, 96px); max-width: 720px; }
.pagehero h1 { color: var(--white); margin-bottom: 0.3em; }
.pagehero p { color: rgba(255,255,255,0.9); font-size: 1.1rem; margin: 0; max-width: 52ch; }

/* ---------- Sections ---------- */
.section { padding-block: clamp(56px, 9vw, 96px); }
.section--paper { background: var(--paper); }
.section__head { max-width: 640px; margin-bottom: 2.4rem; }
.section__head p { color: var(--grey); font-size: 1.08rem; }

.lede { font-size: clamp(1.1rem, 2.4vw, 1.35rem); color: var(--ink); max-width: 60ch; }

/* ---------- Cards grid ---------- */
.grid {
  display: grid;
  gap: 22px;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
}
.card {
  background: var(--white);
  border: 1px solid rgba(6, 68, 98, 0.10);
  border-radius: var(--radius);
  padding: 26px 24px;
  box-shadow: var(--shadow);
}
.card__tag {
  display: inline-block;
  width: 34px; height: 4px; border-radius: 4px;
  background: var(--brand-gradient);
  margin-bottom: 16px;
}
.card h3 { color: var(--navy); }
.card p { color: var(--ink); margin: 0; }
.card p + p { margin-top: 0.8em; }

/* service blocks (services page) */
.service {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding-block: 30px;
  border-top: 1px solid rgba(6, 68, 98, 0.12);
}
.service:first-of-type { border-top: 0; }
.service .num { font-family: var(--font-heading); font-weight: 700; color: var(--steel); font-size: 0.95rem; letter-spacing: 0.05em; }
.service h3 { font-size: 1.35rem; margin: 2px 0 6px; }
.service p { color: var(--ink); max-width: 62ch; margin: 0; }
@media (min-width: 720px) {
  .service { grid-template-columns: 160px 1fr; gap: 24px; align-items: start; }
}

/* principles */
.principles { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); margin-top: 1.6rem; }
.principle { padding: 22px; border-radius: var(--radius); background: var(--white); border: 1px solid rgba(6,68,98,0.10); }
.principle h3 { font-size: 1.05rem; margin-bottom: 6px; }
.principle p { margin: 0; color: var(--grey); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; gap: 30px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); align-items: start; }
.contact-line { margin: 0 0 4px; }
.contact-line .label { display: block; font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--grey); margin-bottom: 2px; }
.contact-line .value { font-size: 1.15rem; color: var(--navy); font-weight: 600; }
.contact-block + .contact-block { margin-top: 26px; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--navy);
  color: rgba(255, 255, 255, 0.8);
  padding-block: 48px;
  font-size: 0.92rem;
}
.site-footer a { color: var(--steel); }
.site-footer a:hover { color: var(--white); }
.footer-top { display: flex; flex-wrap: wrap; gap: 28px 60px; justify-content: space-between; align-items: flex-start; }
.footer__logo img { height: 38px; width: auto; filter: brightness(0) invert(1); opacity: 0.95; }
.footer__logo p { margin: 12px 0 0; color: var(--steel); font-size: 0.78rem; letter-spacing: 0.14em; text-transform: uppercase; }
.footer__contact p { margin: 0 0 4px; }
.footer__contact .strong { color: var(--white); }
.footer-legal {
  margin-top: 34px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.55);
  display: flex; flex-wrap: wrap; gap: 6px 18px; justify-content: space-between;
}

/* ---------- Utility ---------- */
.stack-sm > * + * { margin-top: 0.4rem; }
@media (max-width: 520px) {
  .nav__links { gap: 14px; font-size: 0.85rem; }
  .nav__cta { padding: 8px 14px; }
  .nav__links .hide-xs { display: none; }
}