/* ========================================
   EFRA Group — Styles
   ======================================== */

:root {
  --navy:       #0F1A2E;
  --navy-light: #1B2A4A;
  --slate:      #2A3F5F;
  --blue:       #3B82F6;
  --blue-dark:  #2563EB;
  --cyan:       #06B6D4;
  --teal:       #14B8A6;
  --white:      #FFFFFF;
  --off-white:  #F8FAFC;
  --gray-50:    #F1F5F9;
  --gray-100:   #E2E8F0;
  --gray-300:   #CBD5E1;
  --gray-400:   #94A3B8;
  --gray-500:   #64748B;
  --gray-600:   #475569;
  --gray-700:   #334155;
  --gray-800:   #1E293B;
  --gray-900:   #0F172A;

  --font-sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;

  --max-width: 1200px;
  --radius:    12px;
  --radius-sm: 8px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--blue); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--blue-dark); }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.sr-only {
  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: 8px; z-index: 9999;
  background: var(--blue); color: var(--white);
  padding: 8px 16px; border-radius: var(--radius-sm);
  font-weight: 600;
}
.skip-link:focus { top: 8px; }

.section-pad { padding: 100px 0; }

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 12px;
  border-left: 3px solid var(--blue);
  padding-left: 12px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--gray-500);
  max-width: 640px;
  margin-bottom: 60px;
}

/* ---- Header ---- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(15, 26, 46, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background 0.3s;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  font-weight: 700;
  font-size: 1.15rem;
}
.logo:hover { color: var(--white); }
.logo-mark {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  background: var(--blue);
  border-radius: var(--radius-sm);
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--white);
}
.logo-text small { font-weight: 300; opacity: 0.7; font-size: 0.75rem; }

.main-nav ul {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 24px;
}

.main-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-300);
  transition: color 0.2s;
  position: relative;
}
.main-nav a:hover,
.main-nav a.active { color: var(--white); }
.main-nav a.active::after {
  content: '';
  position: absolute; bottom: -4px; left: 0;
  width: 100%; height: 2px; background: var(--blue);
}

.nav-sep {
  width: 1px; height: 20px;
  background: var(--slate);
}

.nav-toggle {
  display: none;
  background: none; border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle .bar {
  display: block;
  width: 24px; height: 2px;
  background: var(--white);
  margin: 5px 0;
  transition: transform 0.3s, opacity 0.3s;
}

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 40%, var(--slate) 100%);
  overflow: hidden;
  padding: 120px 0 80px;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59,130,246,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,0.04) 1px, transparent 1px);
  background-size: 80px 80px;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: left;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 20px;
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.25);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--cyan);
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 4.25rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--white);
  margin-bottom: 20px;
  max-width: 780px;
}
.hero-title em {
  color: var(--blue);
  font-style: italic;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--gray-400);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 40px;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 70px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.25s;
  cursor: pointer;
  border: none;
  line-height: 1;
}
.btn-primary {
  background: var(--blue);
  color: var(--white);
  border: 2px solid var(--blue);
}
.btn-primary:hover {
  background: var(--blue-dark);
  border-color: var(--blue-dark);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(59,130,246,0.3);
}
.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid var(--gray-400);
}
.btn-outline:hover {
  border-color: var(--blue);
  color: var(--white);
  background: rgba(59,130,246,0.1);
  transform: translateY(-2px);
}
.btn-lg { padding: 18px 42px; font-size: 1.05rem; }
.btn-full { width: 100%; }

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

.stat {
  text-align: center;
  padding: 20px;
  border-radius: var(--radius);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
}
.stat-num {
  display: block;
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--cyan);
  margin-bottom: 4px;
}
.stat-label {
  font-size: 0.8rem;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ---- Services ---- */
.services { background: var(--white); }

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

.service-card {
  padding: 40px 32px;
  border-radius: var(--radius);
  background: var(--off-white);
  border: 1px solid var(--gray-100);
  transition: all 0.3s;
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(15,26,46,0.1);
  border-color: var(--gray-300);
}

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

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.95rem;
  color: var(--gray-500);
  line-height: 1.65;
}

/* ---- Expertise ---- */
.expertise {
  background: var(--off-white);
}

.expertise-rows {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.expertise-item {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 32px;
  padding: 28px 32px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--gray-100);
  transition: all 0.25s;
}
.expertise-item:hover {
  border-color: var(--blue);
  box-shadow: 0 4px 20px rgba(59,130,246,0.08);
}

.expertise-num {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--blue);
  opacity: 0.5;
}

.expertise-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 6px;
}

.expertise-body p {
  font-size: 0.95rem;
  color: var(--gray-500);
  line-height: 1.65;
}

/* ---- Stats Bar ---- */
.stats-bar {
  background: var(--navy);
  padding: 70px 0;
}

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

.stats-card {
  text-align: center;
  padding: 24px;
  border-radius: var(--radius);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  position: relative;
}

.stats-number {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 700;
  color: var(--blue);
  line-height: 1;
}
.stats-plus,
.stats-percent {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--cyan);
  vertical-align: super;
  margin-left: 2px;
}
.stats-label {
  display: block;
  font-size: 0.85rem;
  color: var(--gray-400);
  margin-top: 8px;
  letter-spacing: 0.02em;
}

/* ---- Approach ---- */
.approach { background: var(--white); }

.approach-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 700px;
}

.step {
  display: flex;
  gap: 24px;
  padding-bottom: 40px;
  position: relative;
}

.step:last-child { padding-bottom: 0; }

.step-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  width: 24px;
}

.step-dot {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--blue);
  border: 3px solid var(--gray-100);
  flex-shrink: 0;
}

.step-line {
  width: 2px;
  flex: 1;
  background: var(--gray-100);
  margin-top: 4px;
}

.step-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}

.step-content p {
  font-size: 0.95rem;
  color: var(--gray-500);
  line-height: 1.65;
}

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

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

.about-text .section-title {
  margin-bottom: 24px;
}

.about-text p {
  font-size: 1rem;
  color: var(--gray-600);
  margin-bottom: 16px;
  line-height: 1.7;
}

.about-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--gray-100);
}

.about-meta div {
  font-size: 0.9rem;
  color: var(--gray-500);
  line-height: 1.6;
}
.about-meta strong {
  color: var(--navy);
  font-weight: 600;
}

/* Diagram */
.about-diagram {
  position: relative;
  width: 320px;
  height: 320px;
  margin: 0 auto;
}

.diagram-core {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--navy);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  z-index: 2;
  letter-spacing: 0.03em;
}

.diagram-ring {
  position: absolute;
  inset: 8px;
  animation: rotate 30s linear infinite;
}

@keyframes rotate {
  to { transform: rotate(360deg); }
}

.ring-node {
  position: absolute;
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: var(--white);
  border: 2px solid var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--navy);
  box-shadow: 0 4px 12px rgba(15,26,46,0.08);
}
.t1 { top: -12px; left: calc(50% - 35px); }
.t2 { top: calc(50% - 35px); right: -12px; }
.t3 { bottom: -12px; left: calc(50% - 35px); }
.t4 { top: calc(50% - 35px); left: -12px; }
.t5 { top: 8%; right: 4%; }
.t6 { bottom: 8%; left: 4%; }

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

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-info h2 { margin-bottom: 20px; }
.contact-info p {
  font-size: 1rem;
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: 36px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-row {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 12px;
}

.contact-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-row a,
.contact-row span {
  font-size: 0.95rem;
  color: var(--gray-600);
  line-height: 1.5;
}

.contact-form {
  background: var(--off-white);
  border-radius: var(--radius);
  padding: 40px;
  border: 1px solid var(--gray-100);
}

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

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--gray-800);
  background: var(--white);
  transition: border-color 0.2s;
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--gray-400);
}

/* ---- CTA ---- */
.cta {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  text-align: center;
  padding: 90px 0;
}

.cta h2 {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
}

.cta p {
  font-size: 1.1rem;
  color: var(--gray-400);
  margin-bottom: 36px;
}

/* ---- Footer ---- */
.site-footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: 70px 0 30px;
}

.footer-top {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 60px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  margin-bottom: 30px;
}

.footer-brand .logo-mark {
  display: inline-flex;
  margin-bottom: 16px;
}
.footer-brand .logo-text {
  color: var(--white);
  font-weight: 700;
  font-size: 1.1rem;
  vertical-align: middle;
  margin-left: 8px;
}
.footer-brand .logo-text small {
  font-weight: 300;
  opacity: 0.7;
}
.footer-brand p {
  font-size: 0.9rem;
  margin-top: 12px;
  line-height: 1.6;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
}
.footer-col li { margin-bottom: 10px; }
.footer-col a {
  font-size: 0.9rem;
  color: var(--gray-400);
}
.footer-col a:hover { color: var(--blue); }

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

/* ---- Animations ---- */
[data-aos] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-aos].aos-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .about-layout { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }

  .main-nav {
    position: fixed;
    top: 70px; left: 0; right: 0;
    background: var(--navy);
    padding: 24px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 0.3s, opacity 0.3s;
  }
  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
  }
  .main-nav ul {
    flex-direction: column;
    gap: 16px;
  }
  .nav-sep { display: none; }

  .hero-title { font-size: 2.75rem; }
  .hero-subtitle { font-size: 1rem; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .hero-actions { flex-direction: column; }

  .section-title { font-size: 2rem; }
  .services-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .stats-number { font-size: 2.25rem; }

  .about-diagram { width: 240px; height: 240px; }
  .diagram-core { width: 80px; height: 80px; font-size: 0.75rem; }
  .ring-node { width: 56px; height: 56px; font-size: 0.65rem; }

  .contact-form { padding: 24px; }
  .about-meta { grid-template-columns: 1fr; }

  .footer-top { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: 1fr 1fr; }
  .contact-layout { gap: 32px; }
  .about-meta { margin-top: 24px; }

  .cta h2 { font-size: 1.8rem; }

  .expertise-item {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 20px;
  }
  .expertise-num { font-size: 1.2rem; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 2.2rem; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .stat-num { font-size: 1.75rem; }
  .section-title { font-size: 1.7rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-links { grid-template-columns: 1fr; }
}