/* ── Reset & Variables ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy-900: #060D1B;
  --navy-800: #0B1526;
  --navy-700: #0F1E35;
  --blue-600: #1D4ED8;
  --blue-500: #2563EB;
  --blue-400: #3B82F6;
  --blue-300: #60A5FA;
  --white:    #FFFFFF;
  --gray-50:  #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-700: #334155;
  --gray-900: #0F172A;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'DM Serif Display', Georgia, serif;

  --shadow-md: 0 4px 16px rgba(0,0,0,.12);
  --shadow-blue: 0 4px 24px rgba(37,99,235,.3);
  --radius: 12px;
  --container: 1200px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--gray-900);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Typography ── */
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; }
h1 { font-family: var(--font-display); font-size: clamp(2.4rem, 5vw, 3.75rem); font-weight: 400; }
h2 { font-size: clamp(1.75rem, 3vw, 2.4rem); font-weight: 700; }
h3 { font-size: 1.2rem; font-weight: 600; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--blue-500);
  color: var(--white);
  box-shadow: var(--shadow-blue);
}
.btn-primary:hover {
  background: var(--blue-600);
  transform: translateY(-1px);
  box-shadow: 0 6px 28px rgba(37,99,235,.4);
}

.btn-outline-white {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,.25);
}
.btn-outline-white:hover {
  background: rgba(255,255,255,.06);
  border-color: rgba(255,255,255,.5);
}

.btn-ghost {
  background: transparent;
  color: var(--gray-400);
  padding: 14px 0;
}
.btn-ghost:hover { color: var(--white); }

.btn-full { width: 100%; justify-content: center; }

/* ── Labels & Badges ── */
.badge {
  display: inline-block;
  background: rgba(37,99,235,.12);
  color: var(--blue-300);
  border: 1px solid rgba(37,99,235,.25);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.section-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue-400);
  margin-bottom: 12px;
}

/* ── Navigation ── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(6,13,27,.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,.06);
  transition: background 0.3s ease;
}
#navbar.scrolled { background: rgba(6,13,27,.96); }

.nav-container {
  display: flex;
  align-items: center;
  height: 72px;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  white-space: nowrap;
  flex-shrink: 0;
}

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px; height: 34px;
  background: var(--blue-500);
  color: var(--white);
  border-radius: 8px;
  font-size: 0.8125rem;
  font-weight: 700;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
  margin-left: auto;
}
.nav-links a {
  color: var(--gray-400);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 6px;
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--white); }

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  margin-left: auto;
}
.mobile-menu-btn span {
  display: block;
  width: 22px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all 0.3s;
}
.mobile-menu-btn.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-menu-btn.open span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 16px 24px 24px;
  border-top: 1px solid rgba(255,255,255,.06);
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  color: var(--gray-400);
  text-decoration: none;
  font-size: 1rem;
  padding: 10px 4px;
  transition: color 0.2s;
}
.mobile-menu a:hover { color: var(--white); }
.mobile-menu .btn { margin-top: 8px; text-align: center; justify-content: center; }

/* ── Differentiators strip ── */
#differentiators {
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
  padding: 64px 0;
}

.diff-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 36px;
}

.diff-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.diff-icon {
  width: 44px; height: 44px;
  background: rgba(37,99,235,.08);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-500);
  flex-shrink: 0;
}
.diff-icon svg { width: 22px; height: 22px; }

.diff-item strong {
  display: block;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 6px;
}

.diff-item span {
  display: block;
  font-size: 0.8125rem;
  color: var(--gray-500);
  line-height: 1.55;
}

/* ── Hero ── */
#hero {
  background: var(--navy-900);
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 0 96px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 60% at 80% 15%, rgba(37,99,235,.14) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 20% 85%, rgba(14,165,233,.08) 0%, transparent 55%);
  pointer-events: none;
}

.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content h1 { color: var(--white); margin-bottom: 24px; }

.hero-desc {
  color: var(--gray-400);
  font-size: 1.125rem;
  line-height: 1.75;
  margin-bottom: 40px;
  max-width: 500px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 64px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 40px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,.07);
  flex-wrap: wrap;
}

.stat-value {
  display: block;
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--blue-300);
  letter-spacing: -0.03em;
}
.stat-label {
  display: block;
  font-size: 0.8125rem;
  color: var(--gray-400);
  margin-top: 4px;
  line-height: 1.5;
  max-width: 130px;
}

/* Hero SVG animation */
.network-svg { width: 100%; height: auto; }
.node-pulse { animation: pulse 3s ease-in-out infinite; }
.node-pulse-2 { animation: pulse 3s ease-in-out infinite 1s; }
.node-pulse-3 { animation: pulse 3s ease-in-out infinite 2s; }
.path-animated { stroke-dasharray: 300; stroke-dashoffset: 300; animation: drawPath 2.5s ease forwards; }
.path-animated-2 { stroke-dasharray: 300; stroke-dashoffset: 300; animation: drawPath 2.5s ease .5s forwards; }
.path-animated-3 { stroke-dasharray: 300; stroke-dashoffset: 300; animation: drawPath 2.5s ease 1s forwards; }

@keyframes pulse {
  0%, 100% { opacity: .8; r: 6; }
  50% { opacity: 1; r: 8; }
}
@keyframes drawPath {
  to { stroke-dashoffset: 0; }
}

/* ── Section Header ── */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 72px;
}
.section-header h2 { color: var(--gray-900); margin-bottom: 16px; }
.section-header p { color: var(--gray-500); font-size: 1.0625rem; line-height: 1.75; }
.section-header.light h2 { color: var(--white); }
.section-header.light p { color: var(--gray-400); }
.section-header.light .section-label { color: var(--blue-300); }

/* ── Services ── */
#services {
  padding: 128px 0;
  background: var(--white);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 40px 32px;
  transition: all 0.25s ease;
}
.service-card:hover {
  border-color: var(--blue-400);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.service-card.featured {
  background: var(--navy-800);
  border-color: var(--navy-700);
}
.service-card.featured:hover { border-color: var(--blue-500); }
.service-card.featured h3 { color: var(--white); }
.service-card.featured p { color: var(--gray-400); }
.service-card.featured .service-icon { color: var(--blue-300); }
.service-card.featured .service-item { color: var(--gray-400); }
.service-card.featured .service-item::before { color: var(--blue-400); }

.service-icon {
  width: 48px; height: 48px;
  color: var(--blue-500);
  margin-bottom: 24px;
}

.service-card h3 { color: var(--gray-900); margin-bottom: 12px; }
.service-card p { color: var(--gray-500); font-size: 0.9375rem; line-height: 1.75; margin-bottom: 28px; }

.service-items { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.service-item {
  font-size: 0.875rem;
  color: var(--gray-500);
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.service-item::before {
  content: '→';
  color: var(--blue-500);
  flex-shrink: 0;
  margin-top: 1px;
}

/* ── Sectors ── */
#sectors {
  padding: 128px 0;
  background: var(--navy-800);
}

.sectors-list { display: flex; flex-direction: column; gap: 28px; }

.sector-card {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 40px;
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.07);
  border-radius: var(--radius);
  padding: 48px;
  transition: all 0.25s ease;
  align-items: start;
}
.sector-card:hover {
  background: rgba(255,255,255,.05);
  border-color: rgba(37,99,235,.3);
}

.sector-icon {
  width: 56px; height: 56px;
  background: rgba(37,99,235,.12);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-300);
  flex-shrink: 0;
  margin-top: 4px;
}
.sector-icon svg { width: 28px; height: 28px; }

.sector-content h3 {
  color: var(--white);
  font-size: 1.3rem;
  margin-bottom: 16px;
}
.sector-content p {
  color: var(--gray-400);
  line-height: 1.8;
  font-size: 0.9375rem;
  margin-bottom: 28px;
}

.sector-result {
  display: flex;
  align-items: baseline;
  gap: 16px;
  background: rgba(37,99,235,.08);
  border: 1px solid rgba(37,99,235,.18);
  border-radius: 8px;
  padding: 16px 24px;
  max-width: 620px;
}
.result-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--blue-300);
  white-space: nowrap;
  flex-shrink: 0;
}
.result-text {
  font-size: 0.875rem;
  color: var(--gray-400);
  line-height: 1.5;
}

/* ── Approach ── */
#approach {
  padding: 128px 0;
  background: var(--white);
  border-top: 1px solid var(--gray-100);
}

.approach-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 56px;
}

.approach-step {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: all 0.25s ease;
  position: relative;
}
.approach-step:hover {
  border-color: var(--blue-400);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.step-number {
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--blue-500);
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.approach-step h3 {
  color: var(--gray-900);
  margin-bottom: 12px;
  font-size: 1.0625rem;
}

.approach-step p {
  color: var(--gray-500);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.approach-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}
.approach-cta-note {
  color: var(--gray-500);
  font-size: 0.875rem;
  letter-spacing: 0.02em;
}

/* ── Contact ── */
#contact {
  padding: 128px 0;
  background: var(--navy-900);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 80px;
  align-items: start;
}

.contact-info { padding-top: 8px; }
.contact-info h2 { color: var(--white); margin-bottom: 20px; }
.contact-info > p {
  color: var(--gray-400);
  font-size: 1.0625rem;
  line-height: 1.75;
  margin-bottom: 40px;
}

.contact-meta {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--gray-400);
  font-size: 0.9375rem;
}
.contact-item svg { width: 18px; height: 18px; color: var(--blue-400); flex-shrink: 0; }

.contact-form {
  background: rgba(255,255,255,.035);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius);
  padding: 48px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-bottom: 20px;
}
.form-group label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--gray-400);
  letter-spacing: 0.01em;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath d='M4 6l4 4 4-4' stroke='%2394A3B8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

.form-group input,
.form-group select,
.form-group textarea {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 8px;
  padding: 13px 16px;
  color: var(--white);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  width: 100%;
  transition: border-color 0.2s, background 0.2s;
  appearance: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--gray-500); }
.form-group select option { background: var(--navy-800); color: var(--white); }

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--blue-400);
  background: rgba(255,255,255,.07);
}

.form-group textarea { resize: vertical; min-height: 140px; }

.form-error-banner {
  background: rgba(239,68,68,.1);
  border: 1px solid rgba(239,68,68,.3);
  border-radius: 8px;
  padding: 12px 16px;
  color: #FCA5A5;
  font-size: 0.875rem;
  margin-bottom: 16px;
  display: none;
}
.form-error-banner.visible { display: block; }

.form-success {
  display: none;
  text-align: center;
  padding: 64px 32px;
}
.form-success.visible { display: block; }
.form-success .success-icon {
  width: 56px; height: 56px;
  background: rgba(37,99,235,.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  color: var(--blue-300);
}
.form-success h3 { color: var(--white); font-size: 1.25rem; margin-bottom: 12px; }
.form-success p { color: var(--gray-400); font-size: 0.9375rem; line-height: 1.6; }

/* ── Back to top ── */
#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 90;
  width: 44px; height: 44px;
  background: var(--blue-500);
  color: var(--white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(37,99,235,.4);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease, background 0.2s;
  pointer-events: none;
}
#back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
#back-to-top:hover { background: var(--blue-600); }

/* ── Footer ── */
footer {
  background: var(--gray-900);
  border-top: 1px solid rgba(255,255,255,.05);
  padding: 32px 0;
}
.footer-container {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  font-weight: 600;
  font-size: 0.9375rem;
  margin-right: auto;
  text-decoration: none;
}
.footer-nav { display: flex; gap: 24px; }
.footer-nav a {
  color: var(--gray-500);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s;
}
.footer-nav a:hover { color: var(--white); }
.footer-copy { color: var(--gray-500); font-size: 0.8125rem; }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: 1fr 1fr; }
  .approach-steps { grid-template-columns: 1fr 1fr; }
  .hero-container { grid-template-columns: 1fr; gap: 0; }
  .hero-graphic { display: none; }
  .contact-grid { grid-template-columns: 1fr; gap: 56px; }
  .diff-list { grid-template-columns: 1fr 1fr; gap: 28px; }
}

@media (max-width: 768px) {
  .nav-links, .nav-container > .btn { display: none; }
  .mobile-menu-btn { display: flex; }

  .services-grid { grid-template-columns: 1fr; }
  .approach-steps { grid-template-columns: 1fr; }

  .sector-card { grid-template-columns: 1fr; gap: 20px; padding: 32px 24px; }
  .sector-icon { margin-top: 0; }

  .form-row { grid-template-columns: 1fr; }
  .contact-form { padding: 32px 24px; }

  .hero-stats { gap: 24px; }
  .hero-desc { max-width: 100%; }

  .footer-container { flex-direction: column; text-align: center; }
  .footer-brand { margin-right: 0; }

  #services, #sectors, #approach, #contact { padding: 80px 0; }
  #differentiators { padding: 48px 0; }
  .diff-list { grid-template-columns: 1fr; gap: 20px; }
}