/* === Variables === */
:root {
  --navy: #1B3A5C;
  --navy-dark: #122840;
  --orange: #F27B22;
  --orange-dark: #D96A10;
  --white: #FFFFFF;
  --light: #F5F7FA;
  --gray: #6B7280;
  --text: #1F2937;
  --border: #E5E7EB;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--white);
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--navy); text-decoration: none; }
a:hover { color: var(--orange); }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* === Buttons === */
.btn-primary {
  display: inline-block;
  background: var(--orange);
  color: var(--white);
  padding: 0.75rem 1.75rem;
  border-radius: 4px;
  font-weight: 600;
  transition: background 0.2s;
}
.btn-primary:hover { background: var(--orange-dark); color: var(--white); }

.btn-secondary {
  display: inline-block;
  background: transparent;
  color: var(--white);
  border: 2px solid var(--white);
  padding: 0.75rem 1.75rem;
  border-radius: 4px;
  font-weight: 600;
  transition: all 0.2s;
}
.btn-secondary:hover { background: var(--white); color: var(--navy); }

/* === Navigation === */
.main-nav {
  background: var(--navy);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo img { height: 65px; width: auto; }

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: rgba(255,255,255,0.85);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--white); }

.btn-nav {
  background: var(--orange);
  color: var(--white) !important;
  padding: 0.5rem 1.25rem;
  border-radius: 4px;
  font-weight: 600 !important;
  transition: background 0.2s;
}
.btn-nav:hover { background: var(--orange-dark); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
}

/* === Hero === */
.hero {
  background: var(--navy);
  color: var(--white);
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  object-fit: cover;
  width: 100%;
  height: 100%;
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 640px;
}

.hero h1 {
  font-size: 2.75rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

/* === Page Header === */
.page-header {
  background: var(--navy);
  color: var(--white);
  padding: 3rem 0;
}
.page-header h1 { font-size: 2rem; }
.page-header .subtitle { margin-top: 0.5rem; opacity: 0.85; }

/* === Page Content === */
.page-content { padding: 4rem 0; }
.page-content h2 { color: var(--navy); margin: 2rem 0 1rem; font-size: 1.5rem; }
.page-content p { margin-bottom: 1rem; }

/* === Section Styles === */
.section { padding: 4rem 0; }
.section-light { background: var(--light); }

.section-header { text-align: center; margin-bottom: 3rem; }
.section-header h2 { font-size: 2rem; color: var(--navy); margin-bottom: 0.75rem; }
.section-header p { color: var(--gray); max-width: 560px; margin: 0 auto; }

/* === Home: Services overview === */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.service-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.75rem;
  transition: box-shadow 0.2s, border-color 0.2s;
}
.service-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.08); border-color: var(--orange); }
.service-icon { font-size: 2rem; margin-bottom: 0.75rem; }
.service-card h3 { color: var(--navy); margin-bottom: 0.5rem; font-size: 1.1rem; }
.service-card p { color: var(--gray); font-size: 0.95rem; }

/* === Portfolio Grid === */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.portfolio-card {
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
  transition: box-shadow 0.2s, transform 0.2s;
}
.portfolio-card:hover { box-shadow: 0 6px 20px rgba(0,0,0,0.1); transform: translateY(-3px); }

.portfolio-card-image {
  height: 220px;
  background: var(--light);
  overflow: hidden;
}
.portfolio-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s; }
.portfolio-card:hover .portfolio-card-image img { transform: scale(1.04); }

.portfolio-card-body { padding: 1.25rem; }
.portfolio-card-body h3 { color: var(--navy); margin-bottom: 0.25rem; }
.portfolio-card-body .category { color: var(--orange); font-size: 0.85rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.5rem; }
.portfolio-card-body p { color: var(--gray); font-size: 0.9rem; }
.portfolio-card-link { display: inline-block; margin-top: 0.75rem; color: var(--navy); font-weight: 600; font-size: 0.9rem; }
.portfolio-card-link:hover { color: var(--orange); }

/* === Project Detail === */
.project-detail { padding: 4rem 0; }
.project-cover { border-radius: 8px; overflow: hidden; margin-bottom: 2.5rem; max-height: 500px; }
.project-cover img { width: 100%; object-fit: cover; }
.project-body { max-width: 720px; }
.project-body p { margin-bottom: 1rem; color: var(--text); }
.project-category { background: var(--orange); color: var(--white); padding: 0.25rem 0.75rem; border-radius: 20px; font-size: 0.85rem; font-weight: 600; }
.breadcrumb { margin-bottom: 0.75rem; }
.breadcrumb a { color: rgba(255,255,255,0.7); }
.breadcrumb a:hover { color: var(--white); }

.project-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin: 2.5rem 0;
}
.gallery-item { border-radius: 6px; overflow: hidden; height: 200px; }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; }

.project-cta {
  background: var(--light);
  border-radius: 8px;
  padding: 2rem;
  text-align: center;
  margin-top: 3rem;
}
.project-cta p { margin-bottom: 1rem; font-size: 1.1rem; color: var(--navy); font-weight: 600; }

/* === CTA Banner === */
.cta-banner {
  background: var(--navy);
  color: var(--white);
  padding: 4rem 0;
  text-align: center;
}
.cta-banner h2 { font-size: 1.9rem; margin-bottom: 0.75rem; }
.cta-banner p { margin-bottom: 2rem; opacity: 0.85; }

/* === Contact === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.contact-form .form-group { margin-bottom: 1.25rem; }
.contact-form label { display: block; margin-bottom: 0.35rem; font-weight: 600; color: var(--navy); font-size: 0.9rem; }
.contact-form input, .contact-form textarea, .contact-form select {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text);
  background: var(--white);
  transition: border-color 0.2s;
}
.contact-form input:focus, .contact-form textarea:focus {
  outline: none;
  border-color: var(--orange);
}
.contact-form textarea { resize: vertical; min-height: 140px; }

.contact-info h3 { color: var(--navy); margin-bottom: 1rem; font-size: 1.2rem; }
.contact-info p { margin-bottom: 0.5rem; color: var(--gray); }

/* === Footer === */
.site-footer { background: var(--navy-dark); color: rgba(255,255,255,0.75); padding: 3rem 0 0; }

.footer-inner {
  display: grid;
  grid-template-columns: auto 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-logo img { height: 40px; }

.footer-info p { margin-bottom: 0.3rem; font-size: 0.9rem; }
.footer-info a { color: rgba(255,255,255,0.7); }
.footer-info a:hover { color: var(--white); }

.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 0.4rem; }
.footer-links a { color: rgba(255,255,255,0.7); font-size: 0.9rem; }
.footer-links a:hover { color: var(--white); }

.footer-bottom {
  text-align: center;
  padding: 1rem;
  font-size: 0.85rem;
  opacity: 0.5;
}

/* === Responsive === */
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-links { display: none; flex-direction: column; gap: 0; position: absolute; top: 70px; left: 0; right: 0; background: var(--navy); padding: 1rem 0; }
  .nav-links.open { display: flex; }
  .nav-links li { padding: 0.5rem 1.5rem; }

  .hero h1 { font-size: 2rem; }
  .hero { padding: 3rem 0; }

  .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 1.5rem; }
  .portfolio-grid { grid-template-columns: 1fr; }
}