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

:root {
  --navy: #0A1628;
  --navy-light: #142240;
  --navy-mid: #1B3A5C;
  --blue: #2E6BA6;
  --blue-light: #4A90D9;
  --accent: #C5A44E;
  --accent-light: #D4B96A;
  --white: #FFFFFF;
  --gray-50: #F8F9FA;
  --gray-100: #F0F2F5;
  --gray-200: #E2E5EA;
  --gray-400: #8E95A2;
  --gray-600: #4A5568;
  --gray-800: #2D3748;
  --text: #1A202C;
  --text-light: #718096;
  --shadow: 0 4px 24px rgba(10, 22, 40, 0.08);
  --shadow-lg: 0 8px 40px rgba(10, 22, 40, 0.12);
  --radius: 8px;
  --transition: 0.3s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--white);
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; }
h2.section-title { font-size: 2rem; margin-bottom: 12px; color: var(--navy); }
.section-subtitle { color: var(--text-light); font-size: 1.1rem; margin-bottom: 48px; }

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

/* === Buttons === */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
}
.btn-primary:hover { background: var(--navy-mid); border-color: var(--navy-mid); }
.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.5);
}
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: var(--white); }
.btn-white {
  background: var(--white);
  color: var(--navy);
  border-color: var(--white);
}
.btn-white:hover { background: var(--gray-100); }

/* === Navigation === */
.nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(10, 22, 40, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.nav-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.02em;
}
.logo-sdv { color: var(--accent); }
.nav-links {
  list-style: none;
  display: flex;
  gap: 8px;
}
.nav-links a {
  color: rgba(255,255,255,0.7);
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition);
}
.nav-links a:hover, .nav-links a.active {
  color: var(--white);
  background: rgba(255,255,255,0.08);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: all var(--transition);
}

/* === Hero === */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 50%, var(--navy-mid) 100%);
  padding: 140px 0 100px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 50%;
  height: 100%;
  background: radial-gradient(ellipse at 70% 50%, rgba(46,107,166,0.15) 0%, transparent 70%);
}
.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 60px;
  align-items: center;
  position: relative;
}
.hero-badge {
  display: inline-block;
  background: rgba(197, 164, 78, 0.15);
  color: var(--accent);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  margin-bottom: 20px;
  border: 1px solid rgba(197, 164, 78, 0.25);
}
.hero h1 {
  font-size: 3.2rem;
  color: var(--white);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.text-accent { color: var(--accent); }
.hero-subtitle {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.65);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.7;
}
.hero-cta { display: flex; gap: 16px; }
.hero-badges {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.cert-badge {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  padding: 24px 20px;
  text-align: center;
  transition: all var(--transition);
  min-width: 130px;
}
.cert-badge:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(197, 164, 78, 0.3);
}
.cert-icon {
  font-size: 1.8rem;
  color: var(--accent);
  margin-bottom: 8px;
}
.cert-label {
  color: var(--white);
  font-weight: 700;
  font-size: 1.1rem;
}
.cert-sub {
  color: rgba(255,255,255,0.5);
  font-size: 0.8rem;
  margin-top: 2px;
}

/* === Stats === */
.stats {
  background: var(--white);
  padding: 64px 0;
  border-bottom: 1px solid var(--gray-200);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}
.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--navy);
  letter-spacing: -0.02em;
}
.stat-label {
  font-size: 0.9rem;
  color: var(--blue);
  font-weight: 600;
  margin-top: 4px;
}
.stat-desc {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: 4px;
}

/* === Services Preview === */
.services-preview {
  padding: 96px 0;
  background: var(--gray-50);
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 48px;
}
.service-card {
  background: var(--white);
  border-radius: 12px;
  padding: 40px 32px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  border: 1px solid var(--gray-200);
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue-light);
}
.service-icon {
  font-size: 2.5rem;
  margin-bottom: 20px;
}
.service-card h3 {
  font-size: 1.2rem;
  color: var(--navy);
  margin-bottom: 12px;
}
.service-card p {
  color: var(--gray-600);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 16px;
}
.service-codes {
  font-size: 0.8rem;
  color: var(--blue);
  font-weight: 600;
  padding-top: 16px;
  border-top: 1px solid var(--gray-200);
}
.services-cta { text-align: center; }

/* === Why SDV === */
.why-sdv { padding: 96px 0; background: var(--white); }
.why-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 64px;
  align-items: start;
}
.why-item { margin-bottom: 32px; }
.why-item h4 {
  font-size: 1.1rem;
  color: var(--navy);
  margin-bottom: 8px;
}
.why-item p { color: var(--gray-600); font-size: 0.95rem; }
.info-card {
  background: var(--navy);
  border-radius: 12px;
  padding: 32px;
  color: var(--white);
}
.info-card h4 {
  font-size: 1.1rem;
  margin-bottom: 20px;
  color: var(--accent);
}
.info-table { width: 100%; border-collapse: collapse; }
.info-table td {
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  font-size: 0.9rem;
}
.info-table td:first-child {
  color: rgba(255,255,255,0.5);
  width: 120px;
  font-weight: 500;
}
.info-table tr:last-child td { border-bottom: none; }

/* === CTA Section === */
.cta-section {
  background: linear-gradient(135deg, var(--blue) 0%, var(--navy-mid) 100%);
  padding: 80px 0;
  text-align: center;
  color: var(--white);
}
.cta-section h2 {
  font-size: 2rem;
  margin-bottom: 16px;
  color: var(--white);
}
.cta-section p {
  font-size: 1.1rem;
  opacity: 0.8;
  max-width: 600px;
  margin: 0 auto 32px;
}

/* === Footer === */
.footer {
  background: var(--navy);
  color: rgba(255,255,255,0.6);
  padding: 64px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer h4 {
  color: var(--white);
  font-size: 1rem;
  margin-bottom: 16px;
}
.footer p { font-size: 0.9rem; line-height: 1.6; }
.footer ul { list-style: none; }
.footer ul li { margin-bottom: 8px; }
.footer ul a {
  font-size: 0.9rem;
  transition: color var(--transition);
}
.footer ul a:hover { color: var(--white); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
}

/* === Page Header (for inner pages) === */
.page-header {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
  padding: 140px 0 60px;
  text-align: center;
  color: var(--white);
}
.page-header h1 { font-size: 2.5rem; margin-bottom: 12px; }
.page-header p { font-size: 1.1rem; opacity: 0.7; }

/* === Content Sections (for inner pages) === */
.content-section { padding: 80px 0; }
.content-section:nth-child(even) { background: var(--gray-50); }
.content-section h2 { font-size: 1.8rem; color: var(--navy); margin-bottom: 20px; }
.content-section p { color: var(--gray-600); font-size: 1rem; line-height: 1.8; margin-bottom: 16px; }

/* === About Page === */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 32px;
}
.value-card {
  text-align: center;
  padding: 32px 20px;
}
.value-card h4 {
  color: var(--navy);
  margin-bottom: 8px;
}
.value-card p {
  color: var(--gray-600);
  font-size: 0.9rem;
}
.value-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

/* === Services Page === */
.service-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 64px;
  padding-bottom: 64px;
  border-bottom: 1px solid var(--gray-200);
}
.service-detail:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.service-detail:nth-child(even) { direction: rtl; }
.service-detail:nth-child(even) > * { direction: ltr; }
.service-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.meta-tag {
  display: inline-block;
  background: var(--gray-100);
  color: var(--blue);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}
.service-info-box {
  background: var(--navy);
  border-radius: 12px;
  padding: 40px;
  color: var(--white);
}
.service-info-box h3 {
  color: var(--accent);
  font-size: 1.3rem;
  margin-bottom: 16px;
}
.service-info-box ul {
  list-style: none;
}
.service-info-box li {
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  font-size: 0.95rem;
  color: rgba(255,255,255,0.8);
}
.service-info-box li:last-child { border-bottom: none; }
.service-info-box li::before {
  content: '\2713';
  color: var(--accent);
  margin-right: 12px;
  font-weight: 700;
}

/* === Certifications Page === */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.cert-card-full {
  background: var(--white);
  border-radius: 12px;
  padding: 40px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-200);
}
.cert-card-full h3 {
  color: var(--navy);
  font-size: 1.2rem;
  margin-bottom: 8px;
}
.cert-card-full .cert-status {
  display: inline-block;
  background: #DEF5E0;
  color: #1B7A2B;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 16px;
}
.cert-card-full p {
  color: var(--gray-600);
  font-size: 0.95rem;
}

.codes-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 24px;
}
.codes-table th {
  background: var(--navy);
  color: var(--white);
  padding: 14px 20px;
  text-align: left;
  font-size: 0.9rem;
}
.codes-table th:first-child { border-radius: 8px 0 0 0; }
.codes-table th:last-child { border-radius: 0 8px 0 0; }
.codes-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--gray-200);
  font-size: 0.9rem;
  color: var(--gray-600);
}
.codes-table tr:hover { background: var(--gray-50); }

/* === Contact Page === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.contact-info-item {
  margin-bottom: 32px;
}
.contact-info-item h4 {
  color: var(--navy);
  margin-bottom: 8px;
  font-size: 1rem;
}
.contact-info-item p {
  color: var(--gray-600);
  font-size: 0.95rem;
}
.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(--gray-800);
}
.form-group input,
.form-group textarea,
.form-group select {
  padding: 12px 16px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color var(--transition);
  background: var(--white);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--blue);
}
.form-group textarea { min-height: 140px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* === Responsive === */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; }
  .hero-badges { grid-template-columns: repeat(4, 1fr); }
  .hero h1 { font-size: 2.5rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .service-detail { grid-template-columns: 1fr; }
  .service-detail:nth-child(even) { direction: ltr; }
  .contact-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: var(--navy);
    flex-direction: column;
    padding: 16px;
    border-top: 1px solid rgba(255,255,255,0.08);
  }
  .nav-links.open { display: flex; }
  .hero { padding: 120px 0 60px; }
  .hero h1 { font-size: 2rem; }
  .hero-badges { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .values-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; }
  .btn { text-align: center; }
}