/* ============================================================
   CSI — Collaborative Systems Integration
   Design system rebuilt from the live Elementor kit (kit ID 6).
   Navy / CSI-blue / light-grey. Serif display + DM Sans.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:opsz,wght@9..40,400;9..40,500;9..40,600;9..40,700&family=Mulish:wght@400;500;600;700&family=Source+Serif+4:opsz,wght@8..60,400;8..60,500;8..60,600&display=swap');

:root {
  /* Exact CSI kit colors */
  --csi-blue:      #43ABF5;
  --csi-blue-dk:   #06B6D4;
  --navy:          #102542;
  --navy-2:        #0C1D33;
  --text:          #0F172A;
  --muted:         #475569;
  --secondary:     #9CA3AF;
  --border:        #CBD5E1;
  --border-soft:   #E2E8F0;
  --bg-light:      #F6F8FB;
  --white:         #FFFFFF;
  --offwhite:      #F9FAFB;

  /* On-navy variants */
  --on-navy:       #E8EEF6;
  --on-navy-soft:  #93A4BC;

  --serif: "Source Serif 4", Georgia, serif;
  --sans:  "DM Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  --body:  "Mulish", -apple-system, sans-serif;

  --maxw: 1180px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--white);
  color: var(--text);
  font-family: var(--body);
  font-weight: 400;
  line-height: 1.7;
  font-size: 1.0625rem;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--csi-blue); text-decoration: none; transition: color .16s ease; }
a:hover { color: var(--csi-blue-dk); }

/* ---- Typography ---- */
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 500; line-height: 1.18; letter-spacing: -0.015em; color: var(--text); }
h1 { font-size: clamp(2.4rem, 5.2vw, 3.65rem); }
h2 { font-size: clamp(1.85rem, 3.6vw, 2.6rem); }
h3 { font-size: clamp(1.2rem, 2.2vw, 1.5rem); }
h4 { font-size: 1.12rem; font-family: var(--sans); font-weight: 600; }
p  { color: var(--muted); }
strong { color: var(--text); font-weight: 700; }

.accent-line { color: var(--csi-blue); }

.eyebrow {
  font-family: var(--sans);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--csi-blue);
  margin-bottom: .9rem;
}

/* ---- Layout ---- */
.wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: clamp(3.5rem, 8vw, 6.5rem); }
.section--light { background: var(--bg-light); }
.section--navy { background: var(--navy); color: var(--on-navy); }
.section--navy h1, .section--navy h2, .section--navy h3 { color: var(--white); }
.section--navy p { color: var(--on-navy-soft); }
.lede { font-size: clamp(1.05rem, 1.7vw, 1.25rem); color: var(--muted); max-width: 62ch; }
.section--navy .lede { color: var(--on-navy-soft); }
.center { text-align: center; }
.mx-auto { margin-inline: auto; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--sans); font-weight: 600; font-size: .95rem;
  padding: .85rem 1.7rem; border-radius: 4px;
  border: 1.5px solid transparent; cursor: pointer;
  transition: transform .14s ease, background .16s ease, border-color .16s ease, color .16s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--csi-blue); color: var(--white); }
.btn--primary:hover { background: var(--csi-blue-dk); color: var(--white); }
.btn--ghost { border-color: var(--border); color: var(--text); }
.btn--ghost:hover { border-color: var(--csi-blue); color: var(--csi-blue); }
.section--navy .btn--ghost { border-color: rgba(255,255,255,.28); color: var(--white); }
.section--navy .btn--ghost:hover { border-color: var(--csi-blue); color: var(--csi-blue); }
.hero .btn--ghost { border-color: rgba(255,255,255,.45); color: #FFFFFF; }
.hero .btn--ghost:hover { border-color: var(--csi-blue); color: var(--csi-blue); }

/* ---- Header ---- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: #1B3A6B;
  border-bottom: 1px solid rgba(255,255,255,.10);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; padding-block: 1rem; }
.brand { display: flex; align-items: center; gap: .55rem; font-family: var(--sans); font-weight: 700; font-size: 1.15rem; color: var(--white); letter-spacing: .02em; }
.brand .mark {
  width: 34px; height: 34px; display: grid; place-items: center;
  background: var(--csi-blue); color: var(--navy);
  font-family: var(--sans); font-weight: 700; font-size: 1rem; border-radius: 4px;
}
.nav { display: flex; align-items: center; gap: 1.6rem; }
.nav a { font-family: var(--sans); font-size: .85rem; font-weight: 500; letter-spacing: .03em; text-transform: uppercase; color: var(--on-navy-soft); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--white); }
.nav-toggle { display: none; background: none; border: 0; color: var(--white); font-size: 1.6rem; cursor: pointer; line-height: 1; }

@media (max-width: 960px) {
  .nav {
    position: fixed; inset: 65px 0 auto 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: var(--navy-2); border-bottom: 1px solid rgba(255,255,255,.1);
    padding: .5rem var(--gutter) 1rem; display: none;
  }
  .nav.open { display: flex; }
  .nav a { padding: .8rem 0; width: 100%; border-bottom: 1px solid rgba(255,255,255,.07); }
  .nav-toggle { display: block; }
}

/* ---- Hero ---- */
.hero { position: relative; background: var(--navy); color: var(--on-navy); padding-block: clamp(4rem, 10vw, 7.5rem); overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(820px 420px at 80% 0%, rgba(67,171,245,.20), transparent 72%),
    linear-gradient(180deg, #1B3A6B 0%, #16315A 22%, #102542 62%, #0C1D33 100%);
}
.hero .wrap { position: relative; z-index: 1; }
.hero h1 { color: var(--white); max-width: 19ch; }
.hero h1 .accent-line { display: block; }
.hero .eyebrow { color: var(--csi-blue); }
.hero .lede { margin-top: 1.4rem; color: var(--on-navy-soft); }
.hero-actions { margin-top: 2.2rem; display: flex; flex-wrap: wrap; gap: 1rem; }
.hero--sub { padding-block: clamp(3rem, 7vw, 5rem); }
.hero--sub h1 { max-width: 24ch; }

/* ---- Stats ---- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap: 1px; background: var(--border-soft); border: 1px solid var(--border-soft); border-radius: 6px; overflow: hidden; }
.stat { background: var(--white); padding: 1.9rem 1.6rem; text-align: center; }
.stat .num { font-family: var(--serif); font-weight: 600; font-size: clamp(2rem,4vw,2.7rem); color: var(--navy); line-height: 1; }
.stat .label { font-family: var(--sans); font-weight: 600; font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--csi-blue); margin-top: .65rem; }
.stat .desc { font-size: .9rem; margin-top: .35rem; color: var(--muted); }

/* ---- Cards ---- */
.grid { display: grid; gap: 1.5rem; }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(300px,1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(260px,1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); }
.card {
  background: var(--white); border: 1px solid var(--border-soft);
  padding: 1.9rem; border-radius: 6px;
  transition: border-color .18s ease, transform .18s ease, box-shadow .18s ease;
}
.card:hover { border-color: var(--csi-blue); transform: translateY(-3px); box-shadow: 0 12px 30px -12px rgba(11,18,32,.18); }
.section--light .card { background: var(--white); }
.card .idx { font-family: var(--sans); font-weight: 700; font-size: .8rem; letter-spacing: .04em; text-transform: uppercase; color: var(--csi-blue); }
.card h3 { margin: .6rem 0 .5rem; }
.card p { font-size: .95rem; }
.card .more { display: inline-block; margin-top: 1rem; font-family: var(--sans); font-weight: 600; font-size: .82rem; letter-spacing: .04em; }

/* ---- Section heading ---- */
.section-head { max-width: 58ch; margin-bottom: 2.6rem; }
.section-head h2 { margin-bottom: .8rem; }

/* ---- Tables ---- */
.table-wrap { overflow-x: auto; border: 1px solid var(--border-soft); border-radius: 6px; }
table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { text-align: left; padding: .85rem 1rem; border-bottom: 1px solid var(--border-soft); }
th { font-family: var(--sans); font-weight: 600; font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--navy); background: var(--bg-light); }
td { color: var(--muted); }
tr:last-child td { border-bottom: 0; }

/* ---- Team ---- */
.person { background: var(--white); border: 1px solid var(--border-soft); border-radius: 6px; overflow: hidden; }
.person img { width: 100%; aspect-ratio: 1; object-fit: cover; background: var(--bg-light); }
.person .body { padding: 1.3rem; }
.person .name { font-family: var(--serif); font-weight: 600; font-size: 1.22rem; color: var(--text); }
.person .role { font-family: var(--sans); font-weight: 600; font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--csi-blue); margin: .3rem 0 .7rem; }
.person p { font-size: .87rem; line-height: 1.6; }

/* ---- FAQ ---- */
.faq details { border-bottom: 1px solid var(--border-soft); }
.faq summary { cursor: pointer; padding: 1.15rem 0; font-family: var(--sans); font-weight: 600; color: var(--text); list-style: none; display: flex; justify-content: space-between; gap: 1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--csi-blue); font-size: 1.4rem; line-height: 1; }
.faq details[open] summary::after { content: "\2013"; }
.faq details p { padding-bottom: 1.2rem; font-size: .95rem; }

/* ---- Forms ---- */
.field { margin-bottom: 1.1rem; }
.field label { display: block; font-family: var(--sans); font-weight: 600; font-size: .74rem; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); margin-bottom: .4rem; }
.field input, .field select, .field textarea {
  width: 100%; background: var(--white); border: 1px solid var(--border);
  color: var(--text); font-family: var(--body); font-size: .95rem;
  padding: .78rem .9rem; border-radius: 4px;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--csi-blue); box-shadow: 0 0 0 3px rgba(67,171,245,.15); }
.field textarea { min-height: 130px; resize: vertical; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 560px) { .field-row { grid-template-columns: 1fr; } }

/* ---- Glossary ---- */
.glossary-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(285px,1fr)); gap: 1rem; }
.term { background: var(--white); border: 1px solid var(--border-soft); border-radius: 6px; padding: 1.3rem; }
.term:hover { border-color: var(--csi-blue); }
.term .t-name { font-family: var(--serif); font-weight: 600; font-size: 1.12rem; color: var(--text); }
.term .t-cat { font-family: var(--sans); font-weight: 600; font-size: .64rem; letter-spacing: .09em; text-transform: uppercase; color: var(--csi-blue-dk); display: inline-block; margin: .35rem 0 .5rem; }
.term p { font-size: .87rem; }
.term .t-rel { margin-top: .7rem; font-family: var(--sans); font-size: .74rem; color: var(--secondary); }

/* ---- Report hero ---- */
.report-hero { border: 1px solid var(--border-soft); background: var(--white); padding: clamp(2rem,5vw,3.5rem); border-radius: 8px; box-shadow: 0 20px 50px -28px rgba(11,18,32,.25); }
.report-figure { font-family: var(--serif); font-weight: 600; font-size: clamp(3.4rem,10vw,6.5rem); color: var(--csi-blue); line-height: .95; }
.report-figure span { display: block; font-family: var(--sans); font-weight: 600; font-size: .8rem; letter-spacing: .12em; text-transform: uppercase; color: var(--secondary); margin-top: .6rem; }

/* ---- Footer ---- */
.site-footer { background: var(--navy); color: var(--on-navy-soft); padding-block: 3.5rem 2rem; }
.footer-grid { display: grid; grid-template-columns: 1.7fr 1fr 1fr 1fr; gap: 2rem; }
@media (max-width: 780px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-col h4 { font-family: var(--sans); font-weight: 600; font-size: .74rem; letter-spacing: .1em; text-transform: uppercase; color: var(--on-navy-soft); margin-bottom: .9rem; }
.footer-col a { display: block; font-size: .9rem; color: var(--on-navy); padding: .26rem 0; }
.footer-col a:hover { color: var(--csi-blue); }
.footer-about p { font-size: .9rem; margin-top: .8rem; max-width: 34ch; color: var(--on-navy-soft); }
.footer-base { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid rgba(255,255,255,.1); display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; font-size: .8rem; color: var(--on-navy-soft); }
.footer-base .tagline { font-family: var(--sans); font-weight: 600; letter-spacing: .12em; }

/* ---- Breadcrumb ---- */
.crumb { font-family: var(--sans); font-size: .8rem; color: var(--secondary); margin-bottom: 1.4rem; }
.crumb a { color: var(--secondary); }
.crumb a:hover { color: var(--csi-blue); }

/* ---- Reveal ---- */
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(16px); transition: opacity .55s ease, transform .55s ease; }
  .reveal.in { opacity: 1; transform: none; }
}

/* ---- Misc ---- */
.note { font-size: .82rem; color: var(--secondary); font-style: italic; }
.divider { height: 1px; background: var(--border-soft); margin-block: 2.5rem; }
ul.clean { list-style: none; }
ul.ticks { list-style: none; }
ul.ticks li { position: relative; padding-left: 1.5rem; margin-bottom: .55rem; color: var(--muted); font-size: .95rem; }
ul.ticks li::before { content: "\25B8"; position: absolute; left: 0; color: var(--csi-blue); }
.section--navy ul.ticks li { color: var(--on-navy-soft); }