/* ===========================================================
   IDSH — Inga Digital Strategic Hub
   An initiative of E&EL Global Inc. (Delaware)
   Public project overview site.
   =========================================================== */

:root {
  /* Brand palette — institutional, infrastructure-grade */
  --bg-base:        #0a0e1a;        /* deep abyssal */
  --bg-soft:        #111827;        /* secondary dark */
  --bg-card:        #ffffff;        /* card surface */
  --bg-light:       #f6f7fb;        /* light section */
  --bg-light-alt:   #eef1f8;        /* alt light */

  --ink:            #0c1322;        /* primary text on light */
  --ink-soft:       #2c3548;        /* secondary text on light */
  --ink-muted:      #54607a;        /* tertiary text */
  --ink-on-dark:    #f4f6fb;        /* primary text on dark */
  --ink-on-dark-2:  #c2cad8;        /* secondary text on dark */
  --ink-on-dark-3:  #8a93a6;        /* tertiary text on dark */

  --accent:         #c08a3e;        /* copper — Congo / energy */
  --accent-soft:    #e0b76a;        /* lighter copper */
  --accent-deep:    #8b5e1c;        /* deep copper */
  --rule:           rgba(255,255,255,0.08);
  --rule-light:     rgba(12,19,34,0.10);

  --shadow-sm:      0 2px 6px rgba(12,19,34,0.06);
  --shadow-md:      0 8px 28px rgba(12,19,34,0.10);
  --shadow-lg:      0 18px 52px rgba(12,19,34,0.16);

  --radius-sm:      6px;
  --radius-md:      10px;
  --radius-lg:      16px;

  --max-w:          1200px;
}

/* -----------------------------------------------------------
   Base
   ----------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg-light);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent-deep); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--accent); }

h1, h2, h3, h4 {
  font-family: 'Outfit', system-ui, -apple-system, sans-serif;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.18;
  color: var(--ink);
  margin: 0 0 0.6em;
}

p { margin: 0 0 1em; }
ol, ul { margin: 0; padding: 0; list-style: none; }

.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
}

/* -----------------------------------------------------------
   Header
   ----------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 14, 26, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
  transition: background 0.25s ease, border-color 0.25s ease;
}
.site-header.scrolled {
  background: rgba(10, 14, 26, 0.96);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 32px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: var(--ink-on-dark);
}
.brand-mark {
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.06em;
  color: var(--accent-soft);
}
.brand-divider {
  width: 1px;
  height: 22px;
  background: var(--rule);
}
.brand-name {
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 15px;
  color: var(--ink-on-dark);
  letter-spacing: 0.005em;
}
.nav {
  display: flex;
  gap: 28px;
}
.nav a {
  color: var(--ink-on-dark-2);
  font-weight: 500;
  font-size: 14.5px;
  letter-spacing: 0.01em;
  position: relative;
  transition: color 0.2s ease;
}
.nav a:hover { color: var(--accent-soft); }

@media (max-width: 880px) {
  .header-inner { height: 64px; gap: 16px; }
  .brand-name { display: none; }
  .nav { gap: 18px; flex-wrap: wrap; justify-content: flex-end; }
  .nav a { font-size: 13.5px; }
}

/* -----------------------------------------------------------
   Hero
   ----------------------------------------------------------- */
.hero {
  position: relative;
  background: linear-gradient(180deg, #0a0e1a 0%, #111827 100%);
  color: var(--ink-on-dark);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 75% 0%, rgba(192, 138, 62, 0.18) 0%, rgba(192, 138, 62, 0) 55%),
    radial-gradient(ellipse at 10% 100%, rgba(40, 80, 140, 0.22) 0%, rgba(40, 80, 140, 0) 60%),
    linear-gradient(140deg, rgba(255,255,255,0.02) 0%, rgba(255,255,255,0) 50%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  padding: 96px 28px 88px;
}
.hero-eyebrow {
  display: inline-block;
  font-family: 'Outfit', sans-serif;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-soft);
  margin-bottom: 22px;
  padding: 6px 14px;
  border: 1px solid rgba(224, 183, 106, 0.35);
  border-radius: 999px;
}
.hero-title {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: clamp(2.2rem, 4.6vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--ink-on-dark);
  margin: 0 0 24px;
  max-width: 18ch;
}
.hero-desc {
  font-size: clamp(1.05rem, 1.4vw, 1.25rem);
  color: var(--ink-on-dark-2);
  max-width: 60ch;
  line-height: 1.65;
  margin: 0 0 44px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin: 44px 0 48px;
  padding: 26px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.stat-block {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.stat-num {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 28px;
  color: var(--accent-soft);
  letter-spacing: -0.01em;
}
.stat-label {
  font-size: 13px;
  color: var(--ink-on-dark-3);
  line-height: 1.4;
}
@media (max-width: 880px) {
  .hero-inner { padding: 64px 28px 60px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 18px; }
  .stat-num { font-size: 24px; }
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.005em;
  padding: 13px 24px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 6px 18px rgba(192, 138, 62, 0.3);
}
.btn-primary:hover { background: var(--accent-soft); color: var(--ink); border-color: var(--accent-soft); }
.btn-secondary {
  background: transparent;
  color: var(--ink-on-dark);
  border-color: rgba(255,255,255,0.25);
}
.btn-secondary:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.45); }

/* -----------------------------------------------------------
   Sections
   ----------------------------------------------------------- */
.section {
  padding: 96px 0;
  background: var(--bg-light);
}
.section--alt {
  background: #ffffff;
}
.section-badge {
  display: inline-block;
  font-family: 'Outfit', sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-deep);
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(1.8rem, 3vw, 2.65rem);
  max-width: 24ch;
  margin: 0 0 18px;
}
.section-intro {
  max-width: 70ch;
  font-size: 1.06rem;
  color: var(--ink-soft);
  margin: 0 0 56px;
  line-height: 1.7;
}
@media (max-width: 720px) {
  .section { padding: 64px 0; }
  .section-intro { margin-bottom: 36px; }
}

/* -----------------------------------------------------------
   Overview grid
   ----------------------------------------------------------- */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}
.overview-block {
  background: var(--bg-card);
  border: 1px solid var(--rule-light);
  border-radius: var(--radius-md);
  padding: 28px 26px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.overview-block:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.overview-block h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: var(--accent-deep);
}
.overview-block p { color: var(--ink-soft); font-size: 0.97rem; margin: 0; }

/* -----------------------------------------------------------
   Pillars
   ----------------------------------------------------------- */
.pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  counter-reset: pillar;
}
.pillar {
  background: var(--bg-card);
  border: 1px solid var(--rule-light);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.pillar:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.pillar-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
  color: #fff;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 18px;
  box-shadow: 0 4px 12px rgba(192, 138, 62, 0.3);
}
.pillar h3 {
  font-size: 1.25rem;
  margin-bottom: 6px;
}
.pillar-lead {
  font-family: 'Outfit', sans-serif;
  font-weight: 500;
  font-size: 0.94rem;
  color: var(--accent-deep);
  margin-bottom: 14px;
  letter-spacing: 0.005em;
}
.pillar > p:last-child { color: var(--ink-soft); font-size: 0.97rem; margin: 0; }

/* -----------------------------------------------------------
   Parameters
   ----------------------------------------------------------- */
.params-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0;
  border: 1px solid var(--rule-light);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.param {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 22px 26px;
  border-bottom: 1px solid var(--rule-light);
  border-right: 1px solid var(--rule-light);
}
.param:last-child { border-bottom: none; }
@media (max-width: 720px) {
  .param { border-right: none; }
}
.param-label {
  font-family: 'Outfit', sans-serif;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.param-value {
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ink);
}

/* -----------------------------------------------------------
   Architecture
   ----------------------------------------------------------- */
.arch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.arch-card {
  background: var(--bg-card);
  border: 1px solid var(--rule-light);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-md);
  padding: 28px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.arch-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.arch-card h3 { font-size: 1.1rem; margin-bottom: 12px; color: var(--ink); }
.arch-card p { color: var(--ink-soft); font-size: 0.97rem; margin: 0; line-height: 1.65; }

/* -----------------------------------------------------------
   Governance
   ----------------------------------------------------------- */
.gov-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}
.gov-block {
  padding: 28px 0 28px 28px;
  border-left: 2px solid var(--accent);
}
.gov-block h3 { font-size: 1.15rem; margin-bottom: 12px; color: var(--ink); }
.gov-block p { color: var(--ink-soft); font-size: 0.98rem; margin: 0; line-height: 1.7; }

/* -----------------------------------------------------------
   Impact
   ----------------------------------------------------------- */
.impact-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}
.impact-list li { padding: 0; }
.impact-list h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule-light);
  color: var(--accent-deep);
}
.impact-list p { color: var(--ink-soft); font-size: 0.97rem; margin: 0; line-height: 1.65; }

/* -----------------------------------------------------------
   Engagement
   ----------------------------------------------------------- */
.engagement-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-bottom: 56px;
}
.engagement-card {
  background: var(--bg-card);
  border: 1px solid var(--rule-light);
  border-radius: var(--radius-md);
  padding: 28px 26px;
  box-shadow: var(--shadow-sm);
}
.engagement-card h3 { font-size: 1.1rem; margin-bottom: 10px; color: var(--ink); }
.engagement-card p { color: var(--ink-soft); font-size: 0.96rem; margin: 0; line-height: 1.65; }

.contact-card {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0;
  background: linear-gradient(135deg, #0a0e1a 0%, #111827 100%);
  border-radius: var(--radius-lg);
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--rule);
}
.contact-block {
  padding: 36px 36px;
  color: var(--ink-on-dark);
  border-right: 1px solid var(--rule);
}
.contact-block:last-child { border-right: none; }
@media (max-width: 720px) {
  .contact-block { border-right: none; border-bottom: 1px solid var(--rule); }
  .contact-block:last-child { border-bottom: none; }
}
.contact-label {
  display: inline-block;
  font-family: 'Outfit', sans-serif;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-soft);
  margin-bottom: 16px;
}
.contact-name {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--ink-on-dark);
  margin: 0 0 4px;
}
.contact-title {
  font-size: 0.98rem;
  color: var(--ink-on-dark-2);
  margin: 0 0 4px;
}
.contact-org {
  font-size: 0.92rem;
  color: var(--ink-on-dark-3);
  margin: 0 0 8px;
}
.contact-link {
  font-size: 0.95rem;
  margin: 4px 0 0;
}
.contact-link a {
  color: var(--accent-soft);
  border-bottom: 1px solid rgba(224, 183, 106, 0.3);
  padding-bottom: 1px;
}
.contact-link a:hover { color: #fff; border-color: #fff; }

/* -----------------------------------------------------------
   Confidentiality block
   ----------------------------------------------------------- */
.confidentiality {
  background: var(--bg-light-alt);
  padding: 36px 0;
  border-top: 1px solid var(--rule-light);
}
.confidentiality p {
  margin: 0 auto;
  max-width: 90ch;
  font-size: 0.9rem;
  color: var(--ink-muted);
  line-height: 1.65;
  text-align: center;
}

/* -----------------------------------------------------------
   Footer
   ----------------------------------------------------------- */
.site-footer {
  background: #0a0e1a;
  color: var(--ink-on-dark-2);
  padding: 56px 0 36px;
  border-top: 1px solid var(--rule);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 28px;
}
.footer-brand-block { max-width: 360px; }
.footer-brand {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--ink-on-dark);
  margin: 0 0 6px;
}
.footer-tagline {
  font-size: 0.92rem;
  color: var(--ink-on-dark-3);
  margin: 0;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}
.footer-links a {
  color: var(--ink-on-dark-2);
  font-size: 0.94rem;
  transition: color 0.2s ease;
}
.footer-links a:hover { color: var(--accent-soft); }
.footer-copy {
  width: 100%;
  margin: 32px 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  font-size: 0.85rem;
  color: var(--ink-on-dark-3);
}

/* -----------------------------------------------------------
   Reduced motion
   ----------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}