/* =========================================================
   Trusted Intelligent Systems — stylesheet
   ========================================================= */

:root {
  --navy:  #173A5E;
  --teal:  #00857C;
  --ink:   #202A33;
  --muted: #617080;
  --bg:    #F5F8FA;
  --card:  #FFFFFF;
  --line:  #DDE6EA;
  --soft:  #EAF5F4;
  --amber: #F6B73C;
}

/* ── Reset & base ────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ── Skip link ───────────────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -999px;
  left: 0;
  background: var(--teal);
  color: #fff;
  padding: 8px 16px;
  font-weight: 700;
  z-index: 999;
}
.skip-link:focus { top: 0; }

/* ── Topbar / nav ────────────────────────────────────────── */
.topbar {
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav {
  max-width: 1180px;
  margin: auto;
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.logo {
  font-weight: 800;
  color: var(--navy);
  letter-spacing: -.02em;
  font-size: 17px;
  flex-shrink: 0;
}
.logo span { color: var(--teal); }

.navlinks {
  display: flex;
  gap: 22px;
  font-size: 14px;
  color: var(--muted);
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}
.navlinks a:hover { color: var(--navy); }

/* hamburger — hidden on wide screens */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 12px;
  cursor: pointer;
  font-size: 18px;
  color: var(--navy);
  line-height: 1;
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-block;
  background: var(--teal);
  color: #fff;
  padding: 12px 22px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 15px;
  transition: background .2s;
}
.btn:hover { background: #006D66; }

.btn.secondary {
  background: #fff;
  color: var(--navy);
  border: 1px solid var(--line);
}
.btn.secondary:hover { background: var(--soft); }

/* ── Hero ────────────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, var(--navy), #0E243A 60%, var(--teal));
  color: #fff;
}

.hero-inner {
  max-width: 1180px;
  margin: auto;
  padding: 86px 24px 78px;
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 36px;
  align-items: center;
}

.eyebrow {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: #A9E3DE;
  font-weight: 800;
}

.hero h1 {
  font-size: 50px;
  line-height: 1.06;
  margin: 18px 0;
  letter-spacing: -.04em;
}

.hero p.sub {
  font-size: 19px;
  color: #D4E8EA;
  max-width: 640px;
  margin: 0;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.hero-card {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 24px;
  padding: 28px;
  backdrop-filter: blur(8px);
}

.hero-card h2 {
  margin: 0 0 16px;
  color: #A9E3DE;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .06em;
  font-size: 13px;
}

.founder-proof { display: grid; gap: 14px; }

.founder-proof .fp {
  background: rgba(255,255,255,.08);
  border-radius: 14px;
  padding: 14px 16px;
}

.fp strong { display: block; font-size: 15px; margin-bottom: 2px; }
.fp span   { font-size: 13px; color: #B8CDD4; line-height: 1.4; }

/* ── Section layout ──────────────────────────────────────── */
section {
  max-width: 1180px;
  margin: auto;
  padding: 68px 24px;
  scroll-margin-top: 96px;
}

.section-head {
  max-width: 780px;
  margin-bottom: 30px;
}
.section-head h2 {
  font-size: 34px;
  color: var(--navy);
  letter-spacing: -.03em;
  margin: 0 0 10px;
}
.section-head p {
  font-size: 17px;
  color: var(--muted);
}

/* ── Grid & cards ────────────────────────────────────────── */
.grid { display: grid; gap: 20px; }
.grid.three { grid-template-columns: repeat(3, 1fr); }
.grid.two   { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 28px;
  box-shadow: 0 10px 30px rgba(23,58,94,.06);
}
.card h3    { color: var(--navy); margin: 0 0 10px; font-size: 20px; }
.card p     { color: var(--muted); margin: 0; }
.product-descriptor {
  font-size: 13px;
  font-style: italic;
  color: var(--teal);
  margin: 0 0 10px !important;
  line-height: 1.4;
}

.tag {
  display: inline-block;
  background: var(--soft);
  color: var(--teal);
  font-weight: 800;
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 12px;
  margin-bottom: 14px;
}

.list {
  margin: 14px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 15px;
}
.list li { margin: 7px 0; }

.band {
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.band > section { max-width: 1180px; margin: auto; }

/* ── Founders photo ──────────────────────────────────────── */
.founders-photo-wrap {
  display: flex;
  justify-content: center;
  margin: 0 auto 36px;
}

.founders-photo {
  max-width: 360px;
  width: 100%;
  height: auto;
  border-radius: 22px;
  box-shadow: 0 6px 20px rgba(23,58,94,.08);
  display: block;
  object-fit: contain;
}

@media (max-width: 480px) {
  .founders-photo { max-width: 100%; }
}

/* ── Founders bio grid ───────────────────────────────────── */
.founder-bios {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2rem;
  margin-top: 2.5rem;
  align-items: start;
  max-width: 1180px;
  margin-left: auto;
  margin-right: auto;
  padding: 0;
  border: none;
}

.founder-bio-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 32px;
  box-shadow: 0 10px 30px rgba(23,58,94,.06);
}

.founder-bio-card .role {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--teal);
  font-weight: 800;
  margin: 0 0 8px;
}

.founder-bio-card h3 {
  color: var(--navy);
  margin: 0 0 6px;
  font-size: 22px;
}

.founder-bio-card .title {
  color: var(--muted);
  font-size: 15px;
  margin: 0 0 16px;
}

.founder-bio-card p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
  margin: 0 0 14px;
}

.founder-bio-card .credential {
  font-size: 14px;
  color: var(--ink);
  font-weight: 600;
  margin: 6px 0;
}

/* ── Case study ──────────────────────────────────────────── */
.case-study {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 36px;
  box-shadow: 0 10px 30px rgba(23,58,94,.06);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}
.case-study .cs-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--teal);
  font-weight: 800;
  margin-bottom: 8px;
}
.case-study h3 { color: var(--navy); margin: 0 0 16px; font-size: 22px; }
.cs-before, .cs-after { padding: 20px; border-radius: 14px; }
.cs-before { background: #FFF5F5; border: 1px solid #F5DADA; }
.cs-after  { background: #F0FAF9; border: 1px solid #C8E8E5; }
.cs-before h4 { color: #C0392B; margin: 0 0 10px; font-size: 15px; }
.cs-after  h4 { color: var(--teal); margin: 0 0 10px; font-size: 15px; }
.cs-before ul, .cs-after ul { margin: 0; padding-left: 18px; font-size: 14px; color: var(--muted); }
.cs-before li, .cs-after li { margin: 5px 0; }

/* ── Two-route pricing ───────────────────────────────────── */
.route {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.route .card:first-child { border-top: 6px solid var(--navy); }
.route .card:last-child  { border-top: 6px solid var(--teal); }
.price      { font-size: 28px; color: var(--navy); font-weight: 900; margin: 10px 0; }
.price-note { font-size: 14px; color: var(--muted); margin: 0; }

/* ── CTA block ───────────────────────────────────────────── */
.cta {
  background: var(--navy);
  color: #fff;
  border-radius: 28px;
  padding: 48px;
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 30px;
  align-items: center;
}
.cta h2   { margin: 0 0 12px; font-size: 32px; }
.cta p    { color: #DDEEF0; font-size: 16px; margin: 0 0 8px; }
.cta .cta-detail { font-size: 14px; color: #9AB8C4; margin: 8px 0 0; }

/* ── Footer ──────────────────────────────────────────────── */
footer {
  background: #0E243A;
  color: #BFD0DA;
  padding: 34px 24px;
  font-size: 14px;
}
.footer-inner {
  max-width: 1180px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero-inner,
  .grid.three,
  .grid.two,
  .route,
  .cta,
  .founder-bios,
  .case-study {
    grid-template-columns: 1fr;
  }

  .hero h1 { font-size: 36px; }
  .hero-inner { padding: 52px 20px 44px; }

  /* show hamburger, hide inline links */
  .nav-toggle { display: block; }
  .navlinks {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 16px 24px 20px;
    gap: 16px;
    z-index: 9;
    box-shadow: 0 4px 12px rgba(23,58,94,.08);
  }
  .navlinks.open { display: flex; }

  /* keep CTA button always visible in nav */
  .navlinks .btn { align-self: flex-start; }

  .cta { padding: 32px 24px; }
  section { padding: 48px 20px; }

  .section-head h2 { font-size: 28px; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 28px; }
  .hero p.sub { font-size: 16px; }
  .cta h2 { font-size: 24px; }
}