/* ===========================================================
   Ankobra River Transport — design system
   Brand navy #243569 (from the ANKOBRA logo)
   =========================================================== */

:root {
  /* Brand */
  --navy:        #243569;
  --navy-700:    #1c2a53;
  --navy-900:    #131d3a;
  --river:       #2f6db5;   /* brighter "water" blue for links / accents */
  --river-600:   #275f9e;
  --gold:        #c9a14a;   /* warm accent echoing the Adinkra bridge */

  /* Neutrals */
  --fg:          #16203a;
  --muted:       #5a6478;
  --line:        #e4e7ee;
  --bg:          #ffffff;
  --bg-muted:    #f5f7fa;
  --bg-navy:     #1b2747;

  /* Type */
  --font: 'Manrope', system-ui, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  /* Layout */
  --maxw:        1120px;
  --maxw-prose:  68ch;
  --radius:      14px;
  --radius-sm:   10px;
  --shadow:      0 1px 2px rgba(19,29,58,.06), 0 8px 24px rgba(19,29,58,.08);
  --shadow-lg:   0 12px 40px rgba(19,29,58,.16);
  --header-h:    72px;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; }

h1, h2, h3, h4 {
  color: var(--navy);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 0 0 .6em;
}
h2 { font-size: clamp(1.6rem, 3.2vw, 2.25rem); }
h3 { font-size: clamp(1.2rem, 2.2vw, 1.4rem); font-weight: 700; }

a { color: var(--river); text-decoration: none; }
a:hover { color: var(--river-600); text-decoration: underline; }

p { margin: 0 0 1em; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(1rem, 4vw, 2rem); }

/* ---------- Sections ---------- */
.section { padding: clamp(3rem, 7vw, 5.5rem) 0; }
.section.muted { background: var(--bg-muted); }
.section.navy { background: var(--bg-navy); color: #e8ecf6; }
.section.navy h1, .section.navy h2, .section.navy h3 { color: #fff; }
.section .lead { font-size: 1.2rem; color: var(--muted); max-width: var(--maxw-prose); }
.section.navy .lead { color: #c4cce0; }

.eyebrow {
  display: inline-block;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--river);
  margin-bottom: .75rem;
}

/* ---------- Prose ---------- */
.prose { max-width: var(--maxw-prose); }
.prose h2 { margin-top: 1.6em; }
.prose h3 { margin-top: 1.4em; }
.prose ul, .prose ol { margin: 0 0 1em; padding-left: 1.3rem; }
.prose li { margin: .35em 0; }
.prose strong { color: var(--navy); }
.prose a { text-decoration: underline; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  font: inherit; font-weight: 700; font-size: 1rem;
  padding: .8rem 1.4rem; border-radius: 999px;
  border: 1px solid transparent; cursor: pointer;
  text-decoration: none; transition: all .18s ease;
}
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--navy-700); color: #fff; text-decoration: none; box-shadow: var(--shadow); }
.btn-light { background: #fff; color: var(--navy); border-color: rgba(255,255,255,.4); }
.btn-light:hover { background: #f0f3fa; color: var(--navy); text-decoration: none; }
.btn-outline { background: transparent; color: var(--navy); border-color: var(--navy); }
.btn-outline:hover { background: var(--navy); color: #fff; text-decoration: none; }
.btn-ghost-light { background: transparent; color: #fff; border-color: rgba(255,255,255,.55); }
.btn-ghost-light:hover { background: rgba(255,255,255,.12); color: #fff; text-decoration: none; }

.btn-row { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.5rem; }

/* ---------- Cards ---------- */
.card-grid { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.5rem; box-shadow: var(--shadow);
}
.card h3 { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }

/* ---------- Stat band ---------- */
.stats { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
.stat { text-align: center; }
.stat .num { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 800; color: #fff; line-height: 1; letter-spacing: -.02em; }
.stat .label { display: block; margin-top: .5rem; color: #b9c2da; font-size: .95rem; }

/* ===========================================================
   Header
   =========================================================== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.site-header .container { max-width: 1280px; }
.site-header .bar {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h); gap: 1.5rem;
}
.site-header .logo { display: flex; align-items: center; gap: .65rem; }
.site-header .logo img { height: 40px; width: auto; display: block; }
.site-header .logo .name { font-weight: 800; color: var(--navy); letter-spacing: -.01em; font-size: 1.05rem; }

.main-nav { display: flex; align-items: center; gap: 1.25rem; white-space: nowrap; }
.main-nav a { color: var(--fg); font-weight: 600; font-size: .95rem; }
.main-nav a:hover { color: var(--navy); text-decoration: none; }
.main-nav a[aria-current="page"] { color: var(--navy); }
.main-nav a[aria-current="page"]::after { content:""; display:block; height:2px; background:var(--river); border-radius:2px; margin-top:2px; }
.main-nav a.btn { padding: .55rem 1.1rem; font-size: .95rem; }
.main-nav a.btn-primary { color: #fff; }
.main-nav a.btn-primary:hover { color: #fff; }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: .4rem; color: var(--navy); }
.nav-toggle svg { display: block; }

@media (max-width: 1040px) {
  .nav-toggle { display: inline-flex; }
  .main-nav {
    position: fixed; inset: var(--header-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: .5rem clamp(1rem,4vw,2rem) 1.25rem;
    box-shadow: var(--shadow-lg);
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: opacity .18s ease, transform .18s ease;
  }
  .main-nav.open { transform: none; opacity: 1; pointer-events: auto; }
  .main-nav a { padding: .85rem .25rem; border-bottom: 1px solid var(--line); }
  .main-nav a[aria-current="page"]::after { display: none; }
  .main-nav .btn { margin-top: .9rem; justify-content: center; }
}

/* ===========================================================
   Footer
   =========================================================== */
.site-footer { background: var(--navy-900); color: #c6cee2; padding: 3rem 0 2rem; }
.site-footer a { color: #c6cee2; }
.site-footer a:hover { color: #fff; text-decoration: none; }
.footer-top { display: grid; gap: 2rem; grid-template-columns: 1.4fr 1fr 1fr; }
.footer-brand img { height: 54px; filter: brightness(0) invert(1); opacity: .92; }
.footer-brand p { margin-top: 1rem; max-width: 34ch; color: #9aa6c4; font-size: .95rem; }
.footer-col h4 { color: #fff; font-size: .85rem; letter-spacing: .1em; text-transform: uppercase; margin: 0 0 .9rem; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin: .5rem 0; }
.footer-bottom {
  margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid rgba(255,255,255,.12);
  display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; justify-content: space-between;
  font-size: .9rem; color: #8e9abb;
}
@media (max-width: 720px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

/* ---------- Forms ---------- */
.form { max-width: 620px; }
.form .field { margin-bottom: 1.1rem; }
.form label { display: block; font-weight: 600; color: var(--navy); margin-bottom: .4rem; font-size: .95rem; }
.form input, .form textarea, .form select {
  width: 100%; font: inherit; color: var(--fg);
  padding: .75rem .9rem; border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: #fff; transition: border-color .15s ease, box-shadow .15s ease;
}
.form input:focus, .form textarea:focus, .form select:focus {
  outline: none; border-color: var(--river); box-shadow: 0 0 0 3px rgba(47,109,181,.15);
}
.form textarea { min-height: 140px; resize: vertical; }
.form .check { display: flex; align-items: flex-start; gap: .6rem; }
.form .check input { width: auto; margin-top: .3rem; }
.form .check label { font-weight: 400; color: var(--muted); margin: 0; }
.form .note { color: var(--muted); font-size: .9rem; margin-top: 1rem; }
.form-status { margin-top: 1rem; padding: .8rem 1rem; border-radius: var(--radius-sm); display: none; }
.form-status.ok { display: block; background: #e8f6ee; color: #1c6b3f; border: 1px solid #bfe6cf; }
.form-status.err { display: block; background: #fdeceb; color: #a32820; border: 1px solid #f3c6c2; }

/* ---------- Page header (interior pages) ---------- */
.page-head { background: var(--bg-navy); color: #fff; padding: clamp(2.5rem,6vw,4rem) 0; }
.page-head h1 { color: #fff; font-size: clamp(2rem,5vw,3rem); margin: 0; }
.page-head p { color: #c4cce0; font-size: 1.15rem; max-width: var(--maxw-prose); margin: .8rem 0 0; }
.page-body { padding: clamp(2.5rem,6vw,4rem) 0; }

/* ---------- Doc list ---------- */
.doc-list { list-style: none; margin: 0; padding: 0; display: grid; gap: .75rem; }
.doc-list a {
  display: flex; align-items: center; gap: .9rem; padding: 1rem 1.2rem;
  border: 1px solid var(--line); border-radius: var(--radius); background: #fff;
  color: var(--navy); font-weight: 600; box-shadow: var(--shadow); text-decoration: none;
}
.doc-list a:hover { border-color: var(--river); text-decoration: none; }
.doc-list .doc-meta { margin-left: auto; color: var(--muted); font-weight: 400; font-size: .9rem; }