:root {
  --color-primary: #043f5f;
  --color-primary-light: #0a6e8a;
  --color-primary-dark: #022d44;
  --color-white: #ffffff;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-text: #1a202c;
  --color-text-light: #4a5568;
  --color-text-muted: #a0aec0;
  --color-border: #e2e8f0;
  --color-success: #48bb78;
  --color-shadow: rgba(4, 63, 95, 0.1);
  --font-ar: 'Tajawal', sans-serif;
  --font-en: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --transition: 0.3s ease;
  --radius: 12px;
  --radius-sm: 8px;
  --container: 1200px;
  --header-h: 72px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
html.lang-en { font-family: var(--font-en); }
html.lang-ar { font-family: var(--font-ar); }

body {
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.lang-en body { font-family: var(--font-en); }
.lang-ar body { font-family: var(--font-ar); }

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-light); }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
input, textarea, select { font: inherit; color: inherit; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; top: -100%; left: 50%; z-index: 10000;
  background: var(--color-primary); color: var(--color-white);
  padding: 12px 24px; border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  transform: translateX(-50%); font-weight: 700;
}
.skip-link:focus { top: 0; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-alt { background: var(--color-bg-alt); }
.section-dark {
  background: var(--color-primary); color: var(--color-white);
}
.section-dark a { color: rgba(255,255,255,0.85); }
.section-dark a:hover { color: var(--color-white); }

.section-label {
  display: inline-block; font-size: 14px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 2px;
  color: var(--color-primary); margin-bottom: 8px;
}
.section-dark .section-label { color: rgba(255,255,255,0.7); }
.section-title {
  font-size: clamp(28px, 4vw, 40px); font-weight: 700;
  line-height: 1.2; margin-bottom: 16px;
}
.lang-ar .section-title { line-height: 1.3; }
.section-desc {
  font-size: 17px; color: var(--color-text-light);
  max-width: 640px; line-height: 1.7;
}
.section-dark .section-desc { color: rgba(255,255,255,0.75); }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header .section-desc { margin: 0 auto; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: var(--radius-sm);
  font-weight: 600; font-size: 15px;
  transition: all var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-primary); color: var(--color-white);
  border-color: var(--color-primary);
}
.btn-primary:hover { background: var(--color-primary-light); border-color: var(--color-primary-light); color: var(--color-white); }
.btn-outline {
  background: transparent; color: var(--color-white);
  border-color: var(--color-white);
}
.btn-outline:hover { background: var(--color-white); color: var(--color-primary); }
.btn-outline-primary {
  background: transparent; color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline-primary:hover { background: var(--color-primary); color: var(--color-white); }
.btn-sm { padding: 10px 20px; font-size: 14px; }

.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--header-h); background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.navbar.scrolled { box-shadow: 0 2px 20px var(--color-shadow); }
.navbar .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%;
}
.navbar-logo { display: flex; align-items: center; gap: 10px; }
.navbar-logo img { height: 40px; width: auto; }
.navbar-logo span {
  font-size: 20px; font-weight: 700; color: var(--color-primary);
}
.navbar-links { display: flex; align-items: center; gap: 4px; }
.navbar-links a {
  padding: 8px 16px; border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 500; color: var(--color-text-light);
  transition: all var(--transition);
}
.navbar-links a:hover, .navbar-links a[aria-current="page"] {
  color: var(--color-primary); background: rgba(4,63,95,0.06);
}
.lang-toggle {
  display: flex; align-items: center; gap: 4px;
  padding: 8px 16px; margin-left: 8px;
  border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600;
  background: var(--color-primary); color: var(--color-white);
  transition: all var(--transition);
}
.lang-toggle:hover { background: var(--color-primary-light); color: var(--color-white); }
.navbar-toggle {
  display: none; flex-direction: column; gap: 5px;
  padding: 8px; cursor: pointer;
}
.navbar-toggle span {
  display: block; width: 24px; height: 2px;
  background: var(--color-text); border-radius: 2px;
  transition: all var(--transition);
}

.hero {
  min-height: 100vh; display: flex; align-items: center;
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
  color: var(--color-white); position: relative; overflow: hidden;
  padding-top: var(--header-h);
}
.hero-bg { position: absolute; inset: 0; opacity: 0.1; }
.hero-bg .shape {
  position: absolute; border-radius: 50%;
  background: rgba(255,255,255,0.3);
  animation: float 20s ease-in-out infinite;
}
.hero-bg .shape:nth-child(1) { width: 400px; height: 400px; top: -100px; right: -100px; animation-delay: 0s; }
.hero-bg .shape:nth-child(2) { width: 200px; height: 200px; bottom: 10%; left: 5%; animation-delay: -5s; }
.hero-bg .shape:nth-child(3) { width: 150px; height: 150px; top: 30%; left: 30%; animation-delay: -10s; }
.hero-bg .shape:nth-child(4) { width: 300px; height: 300px; bottom: -50px; right: 20%; animation-delay: -15s; }
@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}
.hero-content { position: relative; z-index: 1; max-width: 720px; }
.hero h1 {
  font-size: clamp(32px, 5vw, 56px); font-weight: 800;
  line-height: 1.1; margin-bottom: 20px;
}
.lang-ar .hero h1 { line-height: 1.2; letter-spacing: -0.5px; }
.hero p {
  font-size: clamp(16px, 2vw, 20px);
  color: rgba(255,255,255,0.8); margin-bottom: 32px;
  line-height: 1.7; max-width: 540px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.card {
  background: var(--color-white); border-radius: var(--radius);
  padding: 32px; border: 1px solid var(--color-border);
  transition: all var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px var(--color-shadow); }
.card-icon {
  width: 56px; height: 56px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  background: rgba(4,63,95,0.08); margin-bottom: 20px;
}
.card-icon svg { width: 28px; height: 28px; color: var(--color-primary); }
.card h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.card p { font-size: 14px; color: var(--color-text-light); line-height: 1.7; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.stat-item { text-align: center; }
.stat-number {
  font-size: clamp(32px, 4vw, 48px); font-weight: 800;
  color: var(--color-white); line-height: 1;
  margin-bottom: 8px;
}
.stat-label { font-size: 15px; color: rgba(255,255,255,0.7); }
.stat-item .stat-number { color: var(--color-primary); }
.section-dark .stat-number { color: var(--color-white); }
.section-dark .stat-label { color: rgba(255,255,255,0.7); }

.clients-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 24px; align-items: center;
}
.clients-grid img {
  width: 100%; height: 60px; object-fit: contain;
  filter: grayscale(100%) opacity(0.5);
  transition: all var(--transition);
}
.clients-grid a:hover img { filter: grayscale(0%) opacity(1); }

.works-filter { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 32px; justify-content: center; }
.works-filter button {
  padding: 10px 24px; border-radius: 50px; font-size: 14px; font-weight: 500;
  background: var(--color-bg-alt); color: var(--color-text-light);
  border: 1px solid var(--color-border); transition: all var(--transition);
}
.works-filter button.active, .works-filter button:hover {
  background: var(--color-primary); color: var(--color-white); border-color: var(--color-primary);
}
.works-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.work-item {
  position: relative; border-radius: var(--radius); overflow: hidden;
  cursor: pointer; aspect-ratio: 4/3;
}
.work-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.work-item:hover img { transform: scale(1.08); }
.work-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(4,63,95,0.9) 0%, transparent 50%);
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 24px; opacity: 0; transition: opacity var(--transition);
}
.work-item:hover .work-overlay { opacity: 1; }
.work-overlay h3 { color: var(--color-white); font-size: 18px; font-weight: 600; }
.work-overlay p { color: rgba(255,255,255,0.7); font-size: 13px; margin-top: 4px; }

.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.about-image { border-radius: var(--radius); overflow: hidden; }
.about-image img { width: 100%; height: 100%; object-fit: cover; }

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

.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.team-card {
  text-align: center; padding: 32px 24px;
  background: var(--color-white); border-radius: var(--radius);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}
.team-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px var(--color-shadow); }
.team-card img {
  width: 120px; height: 120px; border-radius: 50%;
  object-fit: cover; margin: 0 auto 16px;
  border: 4px solid rgba(4,63,95,0.1);
}
.team-card h3 { font-size: 18px; font-weight: 600; }
.team-card .role { font-size: 14px; color: var(--color-primary); font-weight: 500; margin: 4px 0 12px; }
.team-card p { font-size: 14px; color: var(--color-text-light); line-height: 1.6; }
.team-socials { display: flex; justify-content: center; gap: 8px; margin-top: 16px; }
.team-socials a {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-bg-alt); color: var(--color-text-light);
  transition: all var(--transition);
}
.team-socials a:hover { background: var(--color-primary); color: var(--color-white); }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-info { display: grid; gap: 24px; }
.contact-card {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 20px; border-radius: var(--radius);
  background: var(--color-bg-alt); border: 1px solid var(--color-border);
}
.contact-card-icon {
  width: 44px; height: 44px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  background: var(--color-primary); color: var(--color-white); flex-shrink: 0;
}
.contact-card h4 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.contact-card p { font-size: 14px; color: var(--color-text-light); line-height: 1.5; }

.contact-form { display: grid; gap: 16px; }
.form-group { display: grid; gap: 6px; }
.form-group label { font-size: 14px; font-weight: 500; }
.form-group input, .form-group textarea, .form-group select {
  padding: 12px 16px; border: 1px solid var(--color-border);
  border-radius: var(--radius-sm); font-size: 15px;
  background: var(--color-white); transition: border-color var(--transition);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none; border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(4,63,95,0.1);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.page-header {
  padding: 120px 0 60px; text-align: center;
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: var(--color-white);
}
.page-header h1 { font-size: clamp(32px, 4vw, 48px); font-weight: 800; margin-bottom: 8px; }
.page-header p { font-size: 17px; color: rgba(255,255,255,0.7); }

.accordion { display: grid; gap: 12px; }
.accordion-item {
  border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  overflow: hidden;
}
.accordion-header {
  padding: 16px 20px; font-weight: 600; font-size: 16px;
  display: flex; justify-content: space-between; align-items: center;
  cursor: pointer; transition: background var(--transition);
  width: 100%; text-align: inherit;
}
.accordion-header:hover { background: var(--color-bg-alt); }
.accordion-header::after {
  content: '+'; font-size: 20px; font-weight: 300;
  transition: transform var(--transition);
}
.accordion-item.active .accordion-header::after { transform: rotate(45deg); }
.accordion-body {
  max-height: 0; overflow: hidden;
  transition: max-height 0.3s ease;
}
.accordion-body-inner { padding: 0 20px 16px; font-size: 15px; color: var(--color-text-light); line-height: 1.7; }
.accordion-item.active .accordion-body { max-height: 300px; }

.tabs { position: relative; }
.tabs-nav { display: flex; gap: 4px; margin-bottom: 32px; flex-wrap: wrap; }
.tabs-nav button {
  padding: 12px 24px; border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  font-size: 15px; font-weight: 500; color: var(--color-text-light);
  border-bottom: 2px solid transparent; transition: all var(--transition);
}
.tabs-nav button.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }
.tabs-nav button:hover { color: var(--color-primary); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.lightbox {
  position: fixed; inset: 0; z-index: 2000;
  background: rgba(0,0,0,0.9); display: flex;
  align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity var(--transition);
}
.lightbox.open { opacity: 1; pointer-events: all; }
.lightbox img { max-width: 90vw; max-height: 90vh; border-radius: var(--radius-sm); }
.lightbox-close {
  position: absolute; top: 20px; right: 20px;
  width: 44px; height: 44px; display: flex;
  align-items: center; justify-content: center;
  color: var(--color-white); font-size: 28px; cursor: pointer;
  border-radius: 50%; transition: background var(--transition);
}
.lightbox-close:hover { background: rgba(255,255,255,0.1); }

.footer {
  background: var(--color-primary-dark); color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand img { height: 40px; width: auto; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; line-height: 1.7; max-width: 300px; }
.footer h4 { color: var(--color-white); font-size: 16px; font-weight: 600; margin-bottom: 16px; }
.footer ul { display: grid; gap: 8px; }
.footer a { color: rgba(255,255,255,0.6); font-size: 14px; transition: color var(--transition); }
.footer a:hover { color: var(--color-white); }
.footer-socials { display: flex; gap: 8px; margin-top: 16px; }
.footer-socials a {
  width: 40px; height: 40px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.1); color: rgba(255,255,255,0.7);
  transition: all var(--transition);
}
.footer-socials a:hover { background: var(--color-primary-light); color: var(--color-white); }
.footer-bottom {
  margin-top: 40px; padding: 20px 0;
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center; font-size: 13px;
}

.newsletter-form { display: flex; gap: 8px; max-width: 400px; }
.newsletter-form input {
  flex: 1; padding: 12px 16px; border-radius: var(--radius-sm);
  border: 1px solid var(--color-border); font-size: 15px;
}
.newsletter-form input:focus { outline: none; border-color: var(--color-primary); }

.back-to-top {
  position: fixed; bottom: 24px; right: 24px; z-index: 999;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--color-primary); color: var(--color-white);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; box-shadow: 0 4px 12px var(--color-shadow);
  opacity: 0; transform: translateY(20px);
  pointer-events: none; transition: all var(--transition);
}
.back-to-top.visible { opacity: 1; transform: translateY(0); pointer-events: all; }
.back-to-top:hover { background: var(--color-primary-light); color: var(--color-white); }

.lang-ar .section { direction: rtl; }
.lang-ar .navbar { direction: rtl; }
.lang-ar .footer { direction: rtl; }
.lang-ar .hero { direction: rtl; }
.lang-ar .hero-content { text-align: right; }
.lang-ar .hero p { margin-left: 0; margin-right: 0; }
.lang-ar .contact-info { text-align: right; }
.lang-ar .contact-card { text-align: right; }
.lang-ar .form-group { text-align: right; }
.lang-ar .lang-en-content { display: none; }
.lang-en .lang-ar-content { display: none; }

.fade-up { opacity: 0; transform: translateY(24px); transition: all 0.6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 992px) {
  .grid-3, .services-grid { grid-template-columns: 1fr 1fr; }
  .grid-4, .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .works-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-content { text-align: center; }
  .hero p { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
}

@media (max-width: 768px) {
  .navbar-links { display: none; }
  .navbar-toggle { display: flex; }
  .navbar-links.open {
    display: flex; flex-direction: column; position: absolute;
    top: var(--header-h); left: 0; right: 0; background: var(--color-white);
    padding: 16px; border-bottom: 1px solid var(--color-border);
    box-shadow: 0 4px 20px var(--color-shadow);
  }
  .lang-toggle { margin-left: 0; }
  .grid-2, .grid-3, .services-grid, .works-grid { grid-template-columns: 1fr; }
  .grid-4, .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .clients-grid { grid-template-columns: repeat(3, 1fr); }
  .page-header { padding: 100px 0 40px; }
  .form-row { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .clients-grid { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 28px; }
  .hero { min-height: 90vh; }
  .section-title { font-size: 24px; }
}