/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue:     #1D3F68;
  --blue-dark:#152e4e;
  --teal:     #57AEA2;
  --teal-dark:#3d8e83;
  --white:    #ffffff;
  --off-white:#f7f9fc;
  --gray-100: #f0f4f8;
  --gray-200: #e2e8f0;
  --gray-500: #718096;
  --gray-700: #2d3748;
  --text:     #1a202c;
  --radius:   8px;
  --shadow:   0 2px 12px rgba(0,0,0,0.08);
  --shadow-lg:0 8px 32px rgba(0,0,0,0.12);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
}

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

h1,h2,h3,h4 { line-height: 1.25; font-weight: 700; color: var(--blue); }
h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.35rem); }

p { margin-bottom: 1rem; color: var(--gray-700); }
p:last-child { margin-bottom: 0; }

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s;
  border: 2px solid transparent;
  text-align: center;
}
.btn-primary {
  background: var(--teal);
  color: var(--white);
  border-color: var(--teal);
}
.btn-primary:hover {
  background: var(--teal-dark);
  border-color: var(--teal-dark);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(87,174,162,0.35);
}
.btn-outline {
  background: transparent;
  color: var(--teal);
  border-color: var(--teal);
}
.btn-outline:hover {
  background: var(--teal);
  color: var(--white);
}
.btn-white {
  background: var(--white);
  color: var(--blue);
  border-color: var(--white);
}
.btn-white:hover {
  background: var(--off-white);
  color: var(--blue-dark);
}

/* ===== NAV ===== */
.nav {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 6px rgba(0,0,0,0.06);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 1.5rem;
}
.nav-logo { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; }
.nav-logo img { height: 48px; width: auto; flex-shrink: 0; }
.nav-logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.nav-logo-name {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--blue);
  letter-spacing: -0.01em;
}
.nav-logo-name span { color: var(--teal); }
.nav-logo-tagline {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--gray-500);
  letter-spacing: 0.04em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}
.nav-links a {
  color: var(--gray-700);
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--blue);
  background: var(--gray-100);
}
.nav-cta { margin-left: 0.5rem; }

/* Dropdown */
.nav-dropdown { position: relative; }
.nav-dropdown > a { display: flex; align-items: center; gap: 0.3rem; }
.nav-dropdown > a::after {
  content: '▾';
  font-size: 0.75rem;
  opacity: 0.6;
}
.dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  min-width: 220px;
  padding: 0.5rem 0;
  list-style: none;
  z-index: 200;
}
.nav-dropdown:hover .dropdown-menu { display: block; }
.dropdown-menu li a {
  display: block;
  padding: 0.5rem 1.1rem;
  color: var(--gray-700);
  font-size: 0.95rem;
  border-radius: 0;
}
.dropdown-menu li a:hover { background: var(--gray-100); color: var(--blue); }
.dropdown-menu .dropdown-section {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-500);
  padding: 0.6rem 1.1rem 0.2rem;
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 0.4rem;
  background: none;
  border: none;
}
.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--blue);
  border-radius: 2px;
  transition: all 0.2s;
}

/* Mobile nav */
.nav-mobile {
  display: none;
  position: fixed;
  top: 68px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--white);
  overflow-y: auto;
  padding: 1rem 1.25rem 2rem;
  z-index: 99;
  border-top: 1px solid var(--gray-200);
}
.nav-mobile.open { display: block; }
.nav-mobile ul { list-style: none; }
.nav-mobile ul li a {
  display: block;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700);
  font-size: 1.05rem;
  font-weight: 500;
}
.nav-mobile ul li a:hover { color: var(--blue); }
.nav-mobile .mobile-section {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-500);
  padding: 1rem 0 0.25rem;
}
.nav-mobile .btn { margin-top: 1rem; width: 100%; }

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-dark) 60%, #0f2040 100%);
  color: var(--white);
  padding: 5rem 0 4rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: rgba(87,174,162,0.08);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -5%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(87,174,162,0.05);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}
.hero-eyebrow {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--teal);
  margin-bottom: 0.75rem;
}
.hero h1 { color: var(--white); margin-bottom: 1.25rem; }
.hero p  { color: rgba(255,255,255,0.82); font-size: 1.1rem; margin-bottom: 1.75rem; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 12px;
  padding: 2rem;
  backdrop-filter: blur(4px);
  width: 100%;
  max-width: 360px;
}
.hero-card h3 { color: var(--white); margin-bottom: 1rem; }
.hero-stat {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.85);
  font-size: 0.95rem;
}
.hero-stat:last-child { border-bottom: none; }
.hero-stat .icon { font-size: 1.25rem; }

/* ===== SECTIONS ===== */
.section { padding: 4.5rem 0; }
.section-alt { background: var(--off-white); }
.section-dark { background: var(--blue); }
.section-teal { background: var(--teal); }

.section-header { text-align: center; margin-bottom: 3rem; }
.section-header .eyebrow {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--teal);
  margin-bottom: 0.5rem;
}
.section-header h2 { margin-bottom: 0.75rem; }
.section-header p { max-width: 620px; margin: 0 auto; }

/* ===== CARDS ===== */
.card-grid {
  display: grid;
  gap: 1.5rem;
}
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  padding: 1.75rem;
  transition: box-shadow 0.2s, transform 0.2s;
}
.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}
.card-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  display: inline-block;
}
.card h3 { color: var(--blue); margin-bottom: 0.6rem; }
.card p { font-size: 0.95rem; }

/* Service cards */
.service-card {
  background: var(--white);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: var(--shadow);
  border-top: 4px solid var(--teal);
  transition: box-shadow 0.2s, transform 0.2s;
}
.service-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.service-card .icon { font-size: 2.5rem; margin-bottom: 1.25rem; display: block; }
.service-card h3 { color: var(--blue); margin-bottom: 0.75rem; }
.service-card ul { padding-left: 1.1rem; color: var(--gray-700); font-size: 0.95rem; }
.service-card ul li { margin-bottom: 0.4rem; }
.service-card .card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-top: 1.25rem;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--teal);
}
.service-card .card-link:hover { gap: 0.5rem; }

/* ===== INDUSTRIES GRID ===== */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.industry-tile {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  padding: 1.25rem 1rem;
  text-align: center;
  transition: all 0.2s;
  cursor: pointer;
  text-decoration: none;
  display: block;
}
.industry-tile:hover {
  border-color: var(--teal);
  box-shadow: 0 4px 16px rgba(87,174,162,0.2);
  transform: translateY(-2px);
}
.industry-tile .tile-icon { font-size: 2rem; margin-bottom: 0.5rem; display: block; }
.industry-tile .tile-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--blue);
}

/* ===== PROCESS STEPS ===== */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  position: relative;
}
.steps::before {
  content: '';
  position: absolute;
  top: 2.25rem;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gray-200);
  z-index: 0;
}
.step {
  position: relative;
  text-align: center;
  padding: 0 1rem;
  z-index: 1;
}
.step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--teal);
  color: var(--white);
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  position: relative;
  z-index: 1;
}
.step h4 { color: var(--blue); margin-bottom: 0.4rem; font-size: 0.95rem; }
.step p { font-size: 0.88rem; }

/* ===== WHAT'S INCLUDED ===== */
.included-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}
.included-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.25rem;
  border: 1px solid var(--gray-200);
}
.included-item .check {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(87,174,162,0.12);
  color: var(--teal);
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.included-item h4 { color: var(--blue); font-size: 0.95rem; margin-bottom: 0.2rem; }
.included-item p { font-size: 0.88rem; margin: 0; }

/* ===== CTA BAND ===== */
.cta-band {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-dark) 100%);
  color: var(--white);
  text-align: center;
  padding: 4rem 0;
}
.cta-band h2 { color: var(--white); margin-bottom: 0.75rem; }
.cta-band p { color: rgba(255,255,255,0.8); max-width: 540px; margin: 0 auto 2rem; }

/* ===== DATA SCIENCE SERVICES ===== */
.ds-card {
  background: var(--white);
  border-radius: 10px;
  padding: 1.75rem;
  border: 1px solid var(--gray-200);
  border-left: 4px solid var(--teal);
  transition: box-shadow 0.2s;
}
.ds-card:hover { box-shadow: var(--shadow-lg); }
.ds-card .icon { font-size: 1.75rem; margin-bottom: 0.75rem; display: block; }
.ds-card h3 { color: var(--blue); margin-bottom: 0.5rem; font-size: 1.1rem; }
.ds-card p { font-size: 0.93rem; }

/* ===== STATS BAR ===== */
.stats-bar {
  background: var(--teal);
  padding: 2.5rem 0;
}
.stats-inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.5rem;
  text-align: center;
}
.stat-item .stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
}
.stat-item .stat-label {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.85);
  margin-top: 0.25rem;
}

/* ===== PAGE HERO (inner pages) ===== */
.page-hero {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-dark) 100%);
  color: var(--white);
  padding: 3.5rem 0;
}
.page-hero .eyebrow {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--teal);
  margin-bottom: 0.5rem;
}
.page-hero h1 { color: var(--white); margin-bottom: 0.75rem; }
.page-hero p { color: rgba(255,255,255,0.82); max-width: 640px; margin: 0 0 1.5rem; }

/* ===== INDUSTRY HERO ===== */
.industry-hero {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-dark) 100%);
  padding: 3.5rem 0;
}
.industry-hero-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 2rem;
}
.industry-hero .eyebrow { color: var(--teal); font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 0.4rem; }
.industry-hero h1 { color: var(--white); margin-bottom: 0.75rem; }
.industry-hero p { color: rgba(255,255,255,0.82); margin: 0 0 1.5rem; max-width: 600px; }
.industry-hero-icon { font-size: 5rem; opacity: 0.3; }

/* ===== ACCORDION (FAQ-style) ===== */
.accordion-item {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  overflow: hidden;
}
.accordion-header {
  width: 100%;
  background: var(--white);
  border: none;
  padding: 1.1rem 1.4rem;
  text-align: left;
  font-weight: 600;
  font-size: 1rem;
  color: var(--blue);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.15s;
}
.accordion-header:hover { background: var(--gray-100); }
.accordion-header .chevron { font-size: 0.9rem; transition: transform 0.2s; }
.accordion-header.open .chevron { transform: rotate(180deg); }
.accordion-body { display: none; padding: 0 1.4rem 1.1rem; font-size: 0.95rem; color: var(--gray-700); }
.accordion-body.open { display: block; }

/* ===== BREADCRUMB ===== */
.breadcrumb {
  background: var(--gray-100);
  padding: 0.6rem 0;
  font-size: 0.85rem;
  color: var(--gray-500);
}
.breadcrumb a { color: var(--gray-500); }
.breadcrumb a:hover { color: var(--blue); }
.breadcrumb span { margin: 0 0.4rem; }

/* ===== FOOTER ===== */
.footer {
  background: var(--blue-dark);
  color: rgba(255,255,255,0.75);
  padding: 3.5rem 0 1.5rem;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}
.footer-brand-logo { display: flex; align-items: center; gap: 0.6rem; margin-bottom: 0.9rem; text-decoration: none; }
.footer-brand-logo img { height: 52px; width: auto; flex-shrink: 0; }
.footer-brand-logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.footer-brand-logo-name { font-size: 1.75rem; font-weight: 800; color: var(--white); letter-spacing: -0.01em; }
.footer-brand-logo-name span { color: var(--teal); }
.footer-brand-logo-tagline { font-size: 0.75rem; font-weight: 500; color: rgba(255,255,255,0.65); letter-spacing: 0.04em; }
.footer-brand p { font-size: 0.9rem; max-width: 260px; color: rgba(255,255,255,0.8); }
.footer-col h4 {
  color: var(--white);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 0.5rem; }
.footer-col ul li a {
  color: rgba(255,255,255,0.65);
  font-size: 0.9rem;
  transition: color 0.15s;
}
.footer-col ul li a:hover { color: var(--teal); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--teal); }

/* ===== UTILITIES ===== */
.text-center { text-align: center; }
.text-teal  { color: var(--teal); }
.text-white { color: var(--white); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-3 { margin-bottom: 1.5rem; }
.highlight { color: var(--teal); }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .nav-links, .nav-cta { display: none; }
  .nav-hamburger { display: flex; }

  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }

  .card-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .card-grid-4 { grid-template-columns: repeat(2, 1fr); }

  .footer-inner { grid-template-columns: 1fr 1fr; }

  .included-grid { grid-template-columns: 1fr; }

  .industry-hero-inner { grid-template-columns: 1fr; }
  .industry-hero-icon { display: none; }

  .steps::before { display: none; }
  .steps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .section { padding: 3rem 0; }
  .steps { grid-template-columns: 1fr; }
  .card-grid-2, .card-grid-3, .card-grid-4 { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .hero { padding: 3rem 0; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; text-align: center; }
}