/* ===== CSS Variables ===== */
:root {
  --blue: #257eba;
  --blue-dark: #193a5d;
  --blue-deep: #0f2740;
  --blue-light: #3a9ad4;
  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-400: #94a3b8;
  --gray-600: #475569;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(15, 39, 64, 0.08);
  --shadow-lg: 0 12px 40px rgba(15, 39, 64, 0.14);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --header-h: 72px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--gray-800);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { border: none; background: none; cursor: pointer; font: inherit; }

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}
.header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--gray-200);
}
.header.scrolled .logo,
.header.scrolled .nav a {
  color: var(--blue-dark);
}
.header.scrolled .nav-cta {
  background: var(--blue);
  color: var(--white) !important;
}
.header.scrolled .nav-toggle span { background: var(--blue-dark); }

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  transition: color var(--transition);
}
.logo-mark-wrap {
  position: relative;
  display: block;
  height: 36px;
  width: 61px; /* matches aspect of logo mark */
  flex-shrink: 0;
}
.logo-mark {
  height: 36px;
  width: auto;
  display: block;
  transition: opacity 0.3s ease;
}
.logo-mark-white {
  opacity: 1;
}
.logo-mark-blue {
  position: absolute;
  left: 0;
  top: 0;
  opacity: 0;
}
/* Scrolled (light bg): cross-fade to blue mark */
.header.scrolled .logo-mark-white { opacity: 0; }
.header.scrolled .logo-mark-blue { opacity: 1; }

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.logo-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
}
.logo-sub {
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  opacity: 0.85;
}

/* Footer always dark — white logo only */
.footer .logo-mark-wrap {
  height: 40px;
  width: 68px;
}
.footer .logo-mark {
  height: 40px;
}
.footer .logo-mark-blue {
  display: none;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255,255,255,0.9);
  transition: color var(--transition);
}
.nav a:hover { color: var(--white); }
.nav-cta {
  background: rgba(255,255,255,0.15);
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.3);
}
.nav-cta:hover {
  background: var(--white);
  color: var(--blue-dark) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  color: var(--white);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(15, 39, 64, 0.92) 0%,
    rgba(25, 58, 93, 0.78) 45%,
    rgba(37, 126, 186, 0.55) 100%
  );
}
.hero-content {
  position: relative;
  z-index: 1;
  padding-top: calc(var(--header-h) + 40px);
  padding-bottom: 80px;
  max-width: 780px;
}
.hero-eyebrow {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.85;
  margin-bottom: 20px;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}
.hero-lead {
  font-size: 1.1rem;
  line-height: 1.7;
  opacity: 0.92;
  margin-bottom: 36px;
  max-width: 560px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}
.scroll-indicator span {
  display: block;
  width: 24px;
  height: 40px;
  border: 2px solid rgba(255,255,255,0.5);
  border-radius: 12px;
  position: relative;
}
.scroll-indicator span::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  width: 4px;
  height: 8px;
  background: rgba(255,255,255,0.8);
  border-radius: 2px;
  transform: translateX(-50%);
  animation: scroll-bounce 1.8s infinite;
}
@keyframes scroll-bounce {
  0%, 100% { opacity: 1; transform: translateX(-50%) translateY(0); }
  50% { opacity: 0.4; transform: translateX(-50%) translateY(10px); }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 999px;
  transition: all var(--transition);
  cursor: pointer;
}
.btn-primary {
  background: var(--blue);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(37, 126, 186, 0.35);
}
.btn-primary:hover {
  background: var(--blue-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 126, 186, 0.4);
}
.btn-outline {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,0.5);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.12);
  border-color: var(--white);
}
.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}

/* ===== Sections ===== */
.section {
  padding: 100px 0;
}
.section-header {
  margin-bottom: 56px;
  max-width: 640px;
}
.section-header.light {
  color: var(--white);
}
.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 12px;
}
.section-header.light .section-tag {
  color: var(--blue-light);
}
.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--blue-dark);
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.section-header.light h2 {
  color: var(--white);
}
.section-desc {
  margin-top: 16px;
  color: var(--gray-600);
  font-size: 1.05rem;
}

/* ===== About ===== */
.about {
  background: var(--gray-50);
}
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: start;
}
.about-text p {
  margin-bottom: 18px;
  color: var(--gray-600);
  font-size: 1.05rem;
}
.about-text strong {
  color: var(--blue-dark);
}
.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.stat-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px 20px;
  box-shadow: var(--shadow);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--blue);
  margin-bottom: 6px;
}
.stat-label {
  font-size: 0.85rem;
  color: var(--gray-600);
  font-weight: 500;
}

/* ===== Technology ===== */
.technology {
  background: linear-gradient(160deg, var(--blue-deep) 0%, var(--blue-dark) 50%, #1a4a7a 100%);
  color: var(--white);
}
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.tech-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: background var(--transition), transform var(--transition), border-color var(--transition);
}
.tech-card:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.22);
  transform: translateY(-4px);
}
.tech-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  color: var(--blue-light);
}
.tech-icon svg {
  width: 100%;
  height: 100%;
}
.tech-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.tech-card p {
  font-size: 0.95rem;
  opacity: 0.85;
  line-height: 1.65;
}

/* ===== Services ===== */
.services {
  background: var(--white);
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.service-card {
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  border: 1px solid var(--gray-200);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.service-card:hover {
  border-color: var(--blue);
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}
.service-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--blue-dark);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.service-card p {
  font-size: 0.95rem;
  color: var(--gray-600);
  line-height: 1.65;
}

/* ===== Advantages ===== */
.advantages {
  background: linear-gradient(160deg, var(--blue-dark) 0%, var(--blue-deep) 100%);
  color: var(--white);
}
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
}
.adv-item {
  position: relative;
  padding-top: 8px;
}
.adv-num {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: rgba(58, 154, 212, 0.35);
  line-height: 1;
  margin-bottom: 12px;
}
.adv-item h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.adv-item p {
  font-size: 0.95rem;
  opacity: 0.85;
  line-height: 1.65;
}

/* ===== CTA ===== */
.cta {
  background: var(--gray-50);
  padding: 80px 0;
}
.cta-box {
  background: linear-gradient(135deg, var(--blue-dark), var(--blue));
  border-radius: var(--radius-lg);
  padding: 64px 48px;
  text-align: center;
  color: var(--white);
  box-shadow: var(--shadow-lg);
}
.cta-box h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.cta-box > p {
  font-size: 1.1rem;
  opacity: 0.9;
  max-width: 520px;
  margin: 0 auto 28px;
}
.cta-regions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 36px;
}
.cta-regions span {
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
}
.contact-hint {
  margin-top: 16px;
  font-size: 0.9rem;
  opacity: 0.9;
  letter-spacing: 0.02em;
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}
.cta-box .btn {
  border: none;
  cursor: pointer;
}

/* ===== Footer ===== */
.footer {
  background: var(--blue-deep);
  color: rgba(255,255,255,0.7);
  padding: 48px 0 32px;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
}
.footer .logo {
  color: var(--white);
  justify-content: center;
}
.footer-tagline {
  font-size: 0.9rem;
  margin-top: 8px;
  opacity: 0.7;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: center;
}
.footer-links a {
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}
.footer-links a:hover {
  color: var(--white);
}
.footer-copy {
  font-size: 0.8rem;
  opacity: 0.55;
  margin-top: 8px;
}

/* ===== Animations (JS-triggered) ===== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .about-stats {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 24px;
    gap: 8px;
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition), opacity var(--transition);
  }
  .nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav a {
    color: var(--blue-dark) !important;
    padding: 12px 16px;
    border-radius: 8px;
    width: 100%;
    text-align: center;
  }
  .nav a:hover {
    background: var(--gray-100);
  }
  .nav-cta {
    background: var(--blue) !important;
    color: var(--white) !important;
    border: none;
    margin-top: 8px;
  }
  .header.scrolled .nav-cta,
  .nav-cta:hover {
    background: var(--blue) !important;
    color: var(--white) !important;
  }

  .hero-content { padding-bottom: 60px; }
  .section { padding: 72px 0; }
  .cta-box { padding: 48px 28px; }
  .about-stats { gap: 12px; }
  .stat-card { padding: 20px 14px; }
  .stat-number { font-size: 1.45rem; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .services-grid,
  .tech-grid {
    grid-template-columns: 1fr;
  }
}