/* ============================================================
   IALE Institute — Nigeria & West Africa
   Minimalist design system · IALE colours
   Navy #0D2F4A (logo) · Gold #C9A84C · Teal #2E8B8B
   ============================================================ */

:root {
  --navy: #0d2f4a;
  --navy-deep: #082238;
  --navy-soft: #16405f;
  --gold: #c9a84c;
  --gold-soft: #e6d3a1;
  --teal: #2e8b8b;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --paper: #ffffff;
  --grey: #f5f5f7;
  --line: rgba(13, 47, 74, 0.12);
  --radius: 22px;
  --nav-h: 73px;
  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1060px; margin: 0 auto; padding: 0 22px; }
.container.wide { max-width: 1240px; }

/* ---------- Accreditation ribbon ---------- */
.ribbon {
  background: var(--navy-deep);
  color: rgba(255, 255, 255, 0.75);
  font-size: 12px;
  letter-spacing: 0.02em;
  text-align: center;
  padding: 7px 16px;
}
.ribbon strong { color: var(--gold-soft); font-weight: 600; }

/* ---------- Navigation ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13, 47, 74, 0.88);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
}
.nav-inner {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 22px;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  font-weight: 600;
  font-size: 21px;
  letter-spacing: 0.01em;
  text-decoration: none;
  white-space: nowrap;
}
.brand:hover { text-decoration: none; }
.brand img { width: 46px; height: 46px; border-radius: 10px; }
.brand span small {
  display: block;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--gold-soft);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  line-height: 1.15;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-left: auto;
  list-style: none;
}
.nav-links a {
  color: rgba(255, 255, 255, 0.82);
  font-size: 17.5px;
  letter-spacing: 0.01em;
  transition: color 0.2s var(--ease);
}
.nav-links a:hover { color: #fff; text-decoration: none; }
.nav-links a.active { color: #fff; font-weight: 600; }
.nav-cta {
  background: var(--gold);
  color: var(--navy-deep) !important;
  font-weight: 600 !important;
  padding: 9px 20px;
  border-radius: 980px;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease);
}
.nav-cta:hover { background: #d9bc6a; transform: scale(1.04); }

.nav-toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  width: 40px;
  height: 40px;
  position: relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 8px;
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all 0.3s var(--ease);
}
.nav-toggle span { top: 19px; }
.nav-toggle span::before { top: -7px; left: 0; }
.nav-toggle span::after { top: 7px; left: 0; }
.nav.open .nav-toggle span { background: transparent; }
.nav.open .nav-toggle span::before { top: 0; transform: rotate(45deg); }
.nav.open .nav-toggle span::after { top: 0; transform: rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(180deg, var(--navy-deep) 0%, var(--navy) 62%, #123a5a 100%);
  color: #fff;
  text-align: center;
  padding: 108px 22px 118px;
  overflow: hidden;
  position: relative;
}
.hero::after {
  content: "";
  position: absolute;
  inset: auto -20% -55% -20%;
  height: 420px;
  background: radial-gradient(ellipse at center, rgba(201, 168, 76, 0.16), transparent 65%);
  pointer-events: none;
}
.eyebrow {
  display: inline-block;
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(40px, 7vw, 76px);
  line-height: 1.05;
  font-weight: 700;
  letter-spacing: -0.022em;
  max-width: 880px;
  margin: 0 auto 22px;
}
.hero h1 em { font-style: normal; color: var(--gold-soft); }
.hero .lede {
  font-size: clamp(18px, 2.4vw, 24px);
  color: rgba(255, 255, 255, 0.78);
  max-width: 680px;
  margin: 0 auto 38px;
  line-height: 1.45;
  font-weight: 400;
}
.hero.sub { padding: 92px 22px 96px; }

.btn-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: 980px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease), color 0.2s;
}
.btn:hover { text-decoration: none; transform: scale(1.04); }
.btn-gold { background: var(--gold); color: var(--navy-deep); }
.btn-gold:hover { background: #d9bc6a; }
.btn-ghost { border: 1.5px solid rgba(255, 255, 255, 0.55); color: #fff; }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.1); }
.btn-navy { background: var(--navy); color: #fff; }
.btn-navy:hover { background: var(--navy-soft); }

/* ---------- Sections ---------- */
section { padding: 92px 0; }
section.tight { padding: 64px 0; }
section.alt { background: var(--grey); }
section.navy-band {
  background: linear-gradient(135deg, var(--navy-deep), var(--navy));
  color: #fff;
  text-align: center;
}
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head h2, .section-head .h2 {
  font-size: clamp(30px, 4.6vw, 48px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--navy);
  margin-bottom: 16px;
}
.navy-band .section-head h2 { color: #fff; }
.section-head p { color: var(--muted); font-size: 19px; }
.navy-band .section-head p { color: rgba(255, 255, 255, 0.75); }

/* ---------- Stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 26px;
  text-align: center;
}
.stat .num {
  font-size: clamp(38px, 5vw, 56px);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--navy);
  line-height: 1;
}
.navy-band .stat .num { color: var(--gold-soft); }
.stat .num sup { font-size: 0.5em; color: var(--gold); top: -0.7em; }
.stat .label { color: var(--muted); font-size: 15px; margin-top: 10px; }
.navy-band .stat .label { color: rgba(255, 255, 255, 0.7); }

/* ---------- Cards ---------- */
.grid { display: grid; gap: 24px; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: #fff;
  border-radius: var(--radius);
  padding: 38px 32px;
  border: 1px solid var(--line);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
section.alt .card { border: none; box-shadow: 0 1px 4px rgba(13, 47, 74, 0.05); }
.card:hover { transform: translateY(-6px); box-shadow: 0 18px 44px rgba(13, 47, 74, 0.13); }
.card .icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  background: rgba(13, 47, 74, 0.06);
}
.card .icon svg { width: 26px; height: 26px; stroke: var(--navy); }
.card.gold .icon { background: rgba(201, 168, 76, 0.14); }
.card.gold .icon svg { stroke: #a8883a; }
.card.teal .icon { background: rgba(46, 139, 139, 0.12); }
.card.teal .icon svg { stroke: var(--teal); }
.card h3 { font-size: 21px; font-weight: 700; letter-spacing: -0.01em; color: var(--navy); margin-bottom: 6px; }
.card .tag { font-size: 13px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--gold); }
.card p { color: var(--muted); font-size: 15.5px; }
.card ul { margin: 14px 0 0 18px; color: var(--muted); font-size: 15px; }
.card ul li { margin-bottom: 7px; }
.card .price { margin-top: 18px; font-size: 14px; font-weight: 600; color: var(--teal); }

/* ---------- Split feature ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.split h2 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--navy);
  line-height: 1.12;
  margin-bottom: 18px;
}
.split p { color: var(--muted); margin-bottom: 14px; }
.split .visual {
  background: linear-gradient(150deg, var(--navy-deep), var(--navy) 55%, var(--teal));
  border-radius: 28px;
  min-height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}
.split .visual img { width: 200px; border-radius: 24px; box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35); }

/* ---------- Methodology stepper ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
.step {
  background: #fff;
  border-radius: 18px;
  padding: 30px 24px;
  border-top: 4px solid var(--gold);
  box-shadow: 0 1px 4px rgba(13, 47, 74, 0.06);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.step:hover { transform: translateY(-5px); box-shadow: 0 14px 34px rgba(13, 47, 74, 0.12); }
.step .n { font-size: 13px; font-weight: 700; letter-spacing: 0.16em; color: var(--gold); }
.step h4 { font-size: 20px; color: var(--navy); margin: 6px 0 8px; letter-spacing: -0.01em; }
.step p { font-size: 14.5px; color: var(--muted); }

/* ---------- Principles / accordion ---------- */
.acc { max-width: 780px; margin: 0 auto; }
.acc-item { border-bottom: 1px solid var(--line); }
.acc-btn {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  padding: 24px 8px;
  font-size: 19px;
  font-weight: 600;
  color: var(--navy);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-family: inherit;
}
.acc-btn .chev { transition: transform 0.3s var(--ease); color: var(--gold); flex: none; font-size: 22px; line-height: 1; }
.acc-item.open .acc-btn .chev { transform: rotate(45deg); }
.acc-panel { max-height: 0; overflow: hidden; transition: max-height 0.4s var(--ease); }
.acc-panel p { color: var(--muted); padding: 0 8px 26px; max-width: 660px; }

/* ---------- People ---------- */
.people { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.person {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.person:hover { transform: translateY(-6px); box-shadow: 0 18px 44px rgba(13, 47, 74, 0.13); }
.person .avatar {
  height: 190px;
  background: linear-gradient(140deg, var(--navy-deep), var(--navy) 60%, var(--teal));
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.person .avatar .initials {
  font-size: 64px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.92);
  letter-spacing: 0.02em;
  padding-bottom: 24px;
}
.person .body { padding: 30px 32px 34px; }
.person h3 { font-size: 23px; color: var(--navy); letter-spacing: -0.01em; }
.person .role { color: var(--gold); font-weight: 700; font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; margin: 4px 0 14px; }
.person p { color: var(--muted); font-size: 15.5px; margin-bottom: 10px; }

/* ---------- Track record ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 44px; }
.chip {
  border: 1.5px solid var(--line);
  background: #fff;
  color: var(--navy);
  padding: 9px 18px;
  border-radius: 980px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.25s var(--ease);
}
.chip:hover { border-color: var(--navy); }
.chip.active { background: var(--navy); color: #fff; border-color: var(--navy); }

.projects { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.project {
  background: #fff;
  border-radius: 20px;
  padding: 30px 28px;
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), opacity 0.3s;
}
.project:hover { transform: translateY(-5px); box-shadow: 0 16px 38px rgba(13, 47, 74, 0.12); }
.project.hide { display: none; }
.project .sector {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 10px;
}
.project h3 { font-size: 18.5px; color: var(--navy); letter-spacing: -0.01em; line-height: 1.25; margin-bottom: 8px; }
.project p { color: var(--muted); font-size: 14.5px; flex: 1; }
.project .meta { margin-top: 16px; font-size: 13px; font-weight: 600; color: var(--gold); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 48px; align-items: start; }
.info-block { margin-bottom: 30px; }
.info-block h3 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 8px;
}
.info-block p, .info-block a { font-size: 18px; color: var(--ink); line-height: 1.5; }
.info-block a { color: var(--teal); }

form.enquiry { background: #fff; border-radius: var(--radius); padding: 38px 34px; border: 1px solid var(--line); box-shadow: 0 8px 30px rgba(13,47,74,0.07); }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 13.5px; font-weight: 600; color: var(--navy); margin-bottom: 6px; }
.field input, .field select, .field textarea {
  width: 100%;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 16px;
  font-family: inherit;
  color: var(--ink);
  background: var(--grey);
  transition: border-color 0.2s, background 0.2s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--teal);
  background: #fff;
}
form .btn { border: none; cursor: pointer; width: 100%; font-family: inherit; }
.form-note { font-size: 13px; color: var(--muted); margin-top: 12px; text-align: center; }

/* ---------- Book ---------- */
.book-cover {
  width: 210px;
  margin: 0 auto;
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-deep) 100%);
  border-radius: 10px;
  padding: 34px 22px;
  aspect-ratio: 2/3;
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 18px 24px 50px rgba(13, 47, 74, 0.35);
  border-left: 6px solid var(--gold);
}
.book-cover .t { font-size: 24px; font-weight: 700; line-height: 1.15; letter-spacing: -0.01em; }
.book-cover .s { font-size: 12.5px; color: rgba(255, 255, 255, 0.75); margin-top: 10px; }
.book-cover .a { font-size: 13px; color: var(--gold-soft); font-weight: 600; }

/* ---------- Book cards (AI Knowledge Sources) ---------- */
.book-card { text-align: center; }
.book-card .book-mini {
  width: 172px;
  aspect-ratio: 2/3;
  margin: 0 auto 26px;
  border-radius: 8px;
  padding: 26px 18px;
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-align: left;
  box-shadow: 12px 18px 40px rgba(13, 47, 74, 0.28);
  border-left: 5px solid var(--gold);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.book-card:hover .book-mini { transform: translateY(-8px) rotate(-1.2deg); box-shadow: 16px 26px 54px rgba(13, 47, 74, 0.36); }
.book-mini .t { font-size: 19px; font-weight: 700; line-height: 1.15; letter-spacing: -0.01em; }
.book-mini .s { font-size: 11px; margin-top: 8px; opacity: 0.75; }
.book-mini .a { font-size: 11px; color: var(--gold-soft); font-weight: 600; }
.book-mini.bc-navy { background: linear-gradient(160deg, var(--navy) 0%, var(--navy-deep) 100%); }
.book-mini.bc-teal { background: linear-gradient(160deg, #257575 0%, #113b3b 100%); }
.book-mini.bc-gold { background: linear-gradient(160deg, #b3913c 0%, #6e5518 100%); border-left-color: #f0e2b8; }
.book-card h3 { font-size: 21px; font-weight: 700; letter-spacing: -0.01em; color: var(--navy); margin-bottom: 8px; }
.book-card p { color: var(--muted); font-size: 15.5px; max-width: 330px; margin: 0 auto; }

/* ---------- Footer ---------- */
footer { background: var(--navy-deep); color: rgba(255, 255, 255, 0.65); padding: 64px 0 40px; font-size: 14px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 44px; }
footer h4 { color: #fff; font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 14px; }
footer ul { list-style: none; }
footer li { margin-bottom: 9px; }
footer a { color: rgba(255, 255, 255, 0.65); }
footer a:hover { color: #fff; }
.foot-brand img { width: 56px; border-radius: 12px; margin-bottom: 14px; }
.foot-brand p { max-width: 280px; line-height: 1.6; }
.foot-legal {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 26px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.45);
}

/* ---------- Reveal animations ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: 0.08s; }
.reveal.d2 { transition-delay: 0.16s; }
.reveal.d3 { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .grid.cols-3, .projects { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .split, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .split .visual { min-height: 300px; }
}

@media (max-width: 720px) {
  section { padding: 64px 0; }
  .hero { padding: 76px 22px 84px; }
  .grid.cols-3, .grid.cols-2, .projects, .people, .steps { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--navy-deep);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 26px 26px;
    gap: 18px;
    display: none;
    box-shadow: 0 24px 40px rgba(0, 0, 0, 0.3);
  }
  .nav.open .nav-links { display: flex; }
  .nav-links a { font-size: 17px; }
}