:root {
  --color-navy: #0A2540;
  --color-white: #FFFFFF;
  --color-gray-50: #F4F6F8;
  --color-gray-100: #E6EAEF;
  --color-gray-500: #6B7280;
  --color-gray-700: #374151;
  --color-accent: #00A4E4;
  --color-accent-dark: #007BB8;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1200px;
  --radius: 8px;
  --shadow: 0 4px 24px rgba(10, 37, 64, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-navy);
  line-height: 1.6;
  background-color: var(--color-white);
}

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

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

.container {
  width: 92%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-gray-100);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-navy);
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background-color: var(--color-navy);
  color: var(--color-white);
  border-radius: var(--radius);
  font-size: 0.9rem;
}

.nav-list {
  display: flex;
  gap: 32px;
  list-style: none;
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-list a:hover {
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--color-navy);
  transition: transform 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}

.btn-secondary:hover {
  background-color: var(--color-navy);
  color: var(--color-white);
}

/* Hero */
.hero {
  padding: 96px 0 80px;
  background-color: var(--color-gray-50);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.hero h1 {
  font-size: 3rem;
  line-height: 1.15;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--color-navy);
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--color-gray-700);
  margin-bottom: 32px;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-media img {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* Sections */
.section {
  padding: 96px 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}

.section-header h2 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-navy);
}

.section-header p {
  font-size: 1.1rem;
  color: var(--color-gray-500);
}

/* About */
.about {
  background-color: var(--color-white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-media img {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.about-content h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.about-content p {
  color: var(--color-gray-700);
  margin-bottom: 16px;
}

.about-list {
  margin-top: 24px;
  list-style: none;
  display: grid;
  gap: 12px;
}

.about-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--color-gray-700);
}

.about-list li::before {
  content: '';
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 50%;
  margin-top: 9px;
  flex-shrink: 0;
}

/* Services */
.services {
  background-color: var(--color-gray-50);
}

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

.service-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius);
  padding: 32px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.service-icon {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  margin-bottom: 20px;
}

.service-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-navy);
}

.service-card p {
  font-size: 0.95rem;
  color: var(--color-gray-500);
}

/* Why */
.why {
  background-color: var(--color-white);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.why-item {
  padding: 24px;
  border-left: 4px solid var(--color-accent);
  background-color: var(--color-gray-50);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.why-item h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-navy);
}

.why-item p {
  font-size: 0.95rem;
  color: var(--color-gray-500);
}

/* Process */
.process {
  background-color: var(--color-gray-50);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.process-step {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius);
  padding: 32px;
}

.step-number {
  display: inline-block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.process-step h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-navy);
}

.process-step p {
  font-size: 0.95rem;
  color: var(--color-gray-500);
}

/* Tech */
.tech {
  background-color: var(--color-white);
}

.tech-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

.tech-tag {
  display: inline-block;
  padding: 10px 20px;
  background-color: var(--color-gray-50);
  border: 1px solid var(--color-gray-100);
  border-radius: 9999px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-navy);
}

/* Portfolio */
.portfolio {
  background-color: var(--color-gray-50);
}

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

.portfolio-card {
  background-color: var(--color-white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-gray-100);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.portfolio-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.portfolio-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background-color: var(--color-gray-100);
}

.portfolio-body {
  padding: 24px;
}

.portfolio-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-navy);
}

.portfolio-body p {
  font-size: 0.95rem;
  color: var(--color-gray-500);
}

/* Contact */
.contact {
  background-color: var(--color-white);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-info h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-navy);
}

.contact-info p {
  color: var(--color-gray-700);
  margin-bottom: 24px;
}

.contact-details {
  list-style: none;
  display: grid;
  gap: 12px;
  color: var(--color-gray-700);
}

.contact-details a {
  color: var(--color-accent);
}

.contact-details a:hover {
  text-decoration: underline;
}

.contact-form {
  background-color: var(--color-gray-50);
  padding: 32px;
  border-radius: var(--radius);
  border: 1px solid var(--color-gray-100);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-navy);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.95rem;
  background-color: var(--color-white);
  color: var(--color-navy);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-note {
  font-size: 0.9rem;
  margin-top: 12px;
  min-height: 1.4em;
}

.form-note.success {
  color: #047857;
}

.form-note.error {
  color: #B91C1C;
}

/* Footer */
.footer {
  background-color: var(--color-navy);
  color: var(--color-white);
  padding: 40px 0;
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
}

.footer-brand .logo-mark {
  background-color: var(--color-white);
  color: var(--color-navy);
}

.footer-nav {
  display: flex;
  gap: 24px;
  font-size: 0.95rem;
}

.footer-nav a:hover {
  color: var(--color-accent);
}

/* Mobile */
@media (max-width: 1024px) {
  .hero-grid,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .services-grid,
  .why-grid,
  .process-grid,
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-media {
    order: 2;
  }

  .about-content {
    order: 1;
  }
}

@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-gray-100);
    padding: 16px 0;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s ease, opacity 0.25s ease;
  }

  .nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-list {
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: 64px 0 56px;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .section {
    padding: 64px 0;
  }

  .section-header h2 {
    font-size: 1.75rem;
  }

  .services-grid,
  .why-grid,
  .process-grid,
  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    flex-direction: column;
    text-align: center;
  }
}