:root {
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --bg-card: #ffffff;
  --border: rgba(15, 23, 42, 0.08);
  --border-strong: rgba(15, 23, 42, 0.14);
  --ink: #111827;
  --ink-soft: #374151;
  --ink-faint: #6b7280;
  --blue-700: #0d2440;
  --blue-600: #3F72AF;
  --blue-500: #5089c6;
  --blue-100: #DBE2EF;
  --blue-50: #eef2f8;
  --radius: 18px;
  --max-width: 1180px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 16px 40px rgba(15, 23, 42, 0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Plus Jakarta Sans", "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--blue-600);
  margin: 0 0 1rem;
}

.text-accent { color: var(--blue-600); }

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.navbar {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.5rem;
  gap: 1.5rem;
}

.logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
  flex-shrink: 0;
}

.logo span {
  font-weight: 800;
  color: var(--blue-600);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 2.25rem;
  margin: 0;
  padding: 0;
  flex: 1;
  justify-content: center;
}

.nav-links a {
  font-weight: 500;
  font-size: 0.92rem;
  color: var(--ink-soft);
  transition: color 0.2s ease;
}

.nav-links a:hover { color: var(--ink); }

.btn-nav { flex-shrink: 0; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.8rem 1.6rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.92rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--blue-600);
  color: #fff;
  box-shadow: 0 10px 24px rgba(63, 114, 175, 0.28);
}

.btn-primary:hover { transform: translateY(-2px); background: var(--blue-700); }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--border-strong);
}

.btn-ghost:hover {
  border-color: var(--blue-500);
  color: var(--blue-600);
}

.btn-nav {
  background: var(--blue-50);
  color: var(--blue-700);
  border: 1px solid var(--blue-100);
  padding: 0.6rem 1.3rem;
  font-size: 0.88rem;
}

.btn-nav:hover { background: var(--blue-100); }

/* Hero */
.hero {
  padding: 5rem 1.5rem 1rem;
  text-align: center;
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero-content { max-width: 760px; margin: 0 auto; }

.hero h1 {
  font-size: clamp(2.3rem, 5.2vw, 3.7rem);
  line-height: 1.12;
  margin: 0 0 1.4rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--ink);
}

.hero-sub {
  font-size: 1.12rem;
  color: var(--ink-faint);
  max-width: 600px;
  margin: 0 auto 2.25rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Sections */
main section {
  padding: 4.25rem 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 2.5rem;
}

.section-head .eyebrow { display: flex; justify-content: center; }

.section-head h2 {
  font-size: clamp(1.85rem, 3.1vw, 2.4rem);
  margin: 0 0 0.9rem;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.section-sub {
  color: var(--ink-faint);
  margin: 0;
}

.lead-text {
  max-width: 760px;
  margin: 0 auto 2rem;
  text-align: center;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

/* Pillar grid */
.pillar-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.pillar-card {
  display: block;
  background: var(--bg-soft);
  border-radius: var(--radius);
  padding: 2.1rem 1.6rem;
  border: 1px solid var(--border);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.pillar-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
  background: var(--bg-card);
}

.pillar-card h3 {
  font-size: 1.05rem;
  margin: 0 0 0.6rem;
  color: var(--ink);
  font-weight: 700;
}

.pillar-card p {
  margin: 0;
  color: var(--ink-faint);
  font-size: 0.93rem;
}

/* Solutions */
.solutions {
  background: var(--bg-soft);
  border-radius: 28px;
}

.solution-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.25rem 2rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.solution-block:last-child { margin-bottom: 0; }

.solution-tag {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--blue-600);
  margin-bottom: 1.1rem;
}

.solution-block h3 {
  font-size: 1.4rem;
  margin: 0 0 1rem;
  color: var(--ink);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.solution-block p {
  color: var(--ink-faint);
  margin: 0 0 0.9rem;
  max-width: 720px;
}

.outcome-list {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.7rem 1.5rem;
}

.outcome-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
  font-weight: 500;
}

.outcome-list li .li-icon {
  flex-shrink: 0;
  margin-top: 0.15rem;
  width: 18px;
  height: 18px;
  color: var(--blue-600);
}

/* Why BlueDevs */
.why-panel {
  background: linear-gradient(180deg, var(--blue-50), transparent);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 3rem 2.25rem;
}

.why-subhead {
  text-align: center;
  font-size: 1.1rem;
  color: var(--ink);
  font-weight: 700;
  margin: 0 0 1.5rem;
}

.differentiator-list {
  list-style: none;
  margin: 0 auto 2rem;
  padding: 0;
  max-width: 880px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem 2rem;
}

.differentiator-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 0.97rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.85rem 1rem;
}

.differentiator-list li .li-icon {
  flex-shrink: 0;
  margin-top: 0.15rem;
  width: 18px;
  height: 18px;
  color: var(--blue-600);
}

.why-closing {
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
  color: var(--ink);
  font-weight: 600;
  font-size: 1.05rem;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.card {
  background: var(--bg-soft);
  border-radius: var(--radius);
  padding: 2.1rem 1.75rem;
  border: 1px solid var(--border);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
  background: var(--bg-card);
}

.card-icon {
  display: inline-flex;
  margin-bottom: 1.1rem;
}

.card-icon svg {
  width: 30px;
  height: 30px;
}

.card-icon svg.icon-lg {
  width: 38px;
  height: 38px;
}

.icon-wrap-lg {
  margin-bottom: 0.6rem;
}

.icon-sky { color: #3F72AF; }
.icon-mint { color: #129a72; }
.icon-lavender { color: #7c3aed; }
.icon-red { color: #e53935; }
.icon-pink { color: #d6336c; }
.icon-amber { color: #d99a06; }

.card h3 {
  font-size: 1.1rem;
  margin: 0 0 0.65rem;
  color: var(--ink);
  font-weight: 700;
}

.card p {
  margin: 0;
  color: var(--ink-faint);
  font-size: 0.95rem;
}

/* Stack */
.stack-groups {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem 2.5rem;
}

.stack-group h3 {
  color: var(--ink);
  font-size: 1rem;
  margin: 0 0 1rem;
  font-weight: 700;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.badge {
  background: var(--bg-soft);
  color: var(--ink-soft);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--border);
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.about-text h2 {
  font-size: clamp(1.85rem, 3.1vw, 2.4rem);
  color: var(--ink);
  margin: 0 0 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.about-text p {
  color: var(--ink-faint);
  margin: 0 0 1.1rem;
}

.about-stats {
  display: grid;
  gap: 1.1rem;
}

.stat-card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem;
  text-align: center;
}

.stat-card-number {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--blue-700);
}

.stat-card-label {
  display: block;
  font-size: 0.85rem;
  color: var(--ink-faint);
  margin-top: 0.3rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Contact */
.contact-panel {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 3rem 2.25rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  text-align: center;
}

.contact-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.1rem 1.5rem;
}

.contact-item .card-icon { margin: 0 auto 1.1rem; }

.contact-item h3 {
  margin: 0 0 0.6rem;
  color: var(--ink);
  font-size: 1rem;
}

.contact-item a,
.contact-item p {
  color: var(--ink-faint);
  font-weight: 600;
  margin: 0;
}

.contact-item a:hover { color: var(--blue-600); }

/* Footer */
.site-footer {
  text-align: center;
  padding: 2.5rem 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.site-footer p {
  color: var(--ink-faint);
  font-size: 0.85rem;
  margin: 0;
}

/* Responsive */
@media (max-width: 980px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .stack-groups { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .pillar-grid { grid-template-columns: repeat(2, 1fr); }
  .outcome-list { grid-template-columns: 1fr; }
  .differentiator-list { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .nav-toggle { display: flex; }
  .btn-nav { display: none; }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    flex-direction: column;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open { max-height: 320px; }

  .nav-links li { width: 100%; }

  .nav-links a {
    display: block;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
  }

  .card-grid { grid-template-columns: 1fr; }
  .contact-panel { padding: 2.5rem 1.5rem; }
  .pillar-grid { grid-template-columns: 1fr; }
  .solution-block { padding: 2rem 1.5rem; }
  .why-panel { padding: 2.5rem 1.5rem; }
}