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

:root {
  --color-primary: #1a3a5c;
  --color-primary-dark: #0f2440;
  --color-primary-light: #2a5a8c;
  --color-accent: #2bb5b2;
  --color-accent-dark: #239997;
  --color-text: #2c3e50;
  --color-text-light: #5a6c7d;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafb;
  --color-bg-dark: #0f2440;
  --color-border: #e1e8ed;
  --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-body: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
  --radius: 8px;
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition);
}

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

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

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

/* ===== Layout ===== */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
  text-align: center;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-light);
  text-align: center;
  max-width: 640px;
  margin: 0 auto 60px;
  line-height: 1.7;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  text-align: center;
}

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

.btn-primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
}

.btn-outline:hover {
  background: #fff;
  color: var(--color-primary);
  border-color: #fff;
  transform: translateY(-1px);
}

.btn-full {
  width: 100%;
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-sm);
  padding: 10px 0;
}

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

.nav-logo {
  display: flex;
  align-items: center;
}

.nav-logo img {
  height: 44px;
  width: auto;
  transition: opacity var(--transition);
}

.nav-logo-white {
  display: block;
}

.nav-logo-blue {
  display: none;
}

.navbar.scrolled .nav-logo-white {
  display: none;
}

.navbar.scrolled .nav-logo-blue {
  display: block;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 8px;
  align-items: center;
}

.nav-link {
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius);
  transition: all var(--transition);
  font-size: 0.95rem;
}

.nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.navbar.scrolled .nav-link {
  color: var(--color-text);
}

.navbar.scrolled .nav-link:hover {
  color: var(--color-primary);
  background: var(--color-bg-alt);
}

.nav-link.nav-cta {
  background: var(--color-accent);
  color: #fff;
  margin-left: 8px;
}

.nav-link.nav-cta:hover {
  background: var(--color-accent-dark);
  color: #fff;
}

/* Mobile Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all var(--transition);
}

.navbar.scrolled .nav-toggle span {
  background: var(--color-text);
}

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(43, 181, 178, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(43, 181, 178, 0.05) 0%, transparent 50%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: 3.25rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.7;
  margin-bottom: 40px;
  max-width: 560px;
}

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

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

.about-intro {
  max-width: 800px;
  margin: 0 auto 48px;
  text-align: center;
}

.about-intro p {
  font-size: 1.1rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

.about-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  margin-bottom: 60px;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-light);
  font-weight: 500;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-text p {
  margin-bottom: 16px;
  font-size: 1.05rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

.about-subheading {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 24px;
  margin-bottom: 12px;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tech-tag {
  display: inline-block;
  padding: 5px 14px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--color-text);
  font-weight: 500;
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.highlight {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.highlight-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.highlight-icon svg {
  width: 24px;
  height: 24px;
}

.highlight h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.highlight p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ===== Services ===== */
.services {
  background: var(--color-bg-alt);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--color-bg);
  border-radius: 12px;
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

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

.service-card.primary {
  border-top: 3px solid var(--color-accent);
}

.service-card.secondary {
  border-top: 3px solid var(--color-primary-light);
}

.service-icon {
  width: 52px;
  height: 52px;
  background: var(--color-bg-alt);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--color-primary);
}

.service-icon svg {
  width: 26px;
  height: 26px;
}

.service-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.service-details {
  list-style: none;
  padding: 0;
}

.service-details li {
  font-size: 0.9rem;
  color: var(--color-text-light);
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
}

.service-details li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 13px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0.6;
}

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

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding-top: 8px;
}

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

.contact-item svg {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-item h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.contact-item p,
.contact-item a {
  font-size: 1rem;
  color: var(--color-text-light);
}

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

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(42, 90, 140, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* ===== Footer ===== */
.footer {
  background: var(--color-bg-dark);
  padding: 60px 0 32px;
  color: rgba(255, 255, 255, 0.6);
}

.footer-grid-content {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 24px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-logo {
  height: 60px;
  width: 60px;
  object-fit: contain;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.5;
}

.footer-nav,
.footer-contact,
.footer-legal {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav h4,
.footer-contact h4,
.footer-legal h4 {
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

.footer-nav a:hover {
  color: #fff;
}

.footer-contact p,
.footer-legal p {
  font-size: 0.9rem;
  line-height: 1.5;
}

.footer-contact a {
  color: rgba(255, 255, 255, 0.6);
}

.footer-contact a:hover {
  color: #fff;
}

.footer-copy {
  font-size: 0.85rem;
  text-align: center;
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
  .hero h1 {
    font-size: 2.5rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .footer-grid-content {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .about-stats {
    gap: 32px;
  }

  .stat-number {
    font-size: 2rem;
  }

  .section {
    padding: 72px 0;
  }

  .section-title {
    font-size: 1.85rem;
  }

  .hero {
    min-height: auto;
    padding: 140px 0 100px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

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

  /* Mobile nav */
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-bg);
    flex-direction: column;
    padding: 80px 32px 32px;
    gap: 4px;
    box-shadow: var(--shadow-lg);
    transition: right var(--transition);
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-link {
    color: var(--color-text);
    padding: 12px 16px;
    width: 100%;
  }

  .nav-link:hover {
    background: var(--color-bg-alt);
    color: var(--color-primary);
  }

  .nav-link.nav-cta {
    margin-left: 0;
    margin-top: 12px;
    text-align: center;
  }
}

@media (max-width: 576px) {
  .footer-grid-content {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.75rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    text-align: center;
  }

  .container {
    padding: 0 16px;
  }
}