/* ===== CSS VARIABLES ===== */
:root {
  --blue-primary: #0067B1;
  --blue-dark: #004F8B;
  --blue-light: #E8F4FD;
  --green-accent: #3BB14B;
  --white: #FFFFFF;
  --gray-bg: #F4F7FA;
  --gray-light: #E5E9EF;
  --gray-mid: #B0B8C3;
  --text-dark: #2C2C2C;
  --text-secondary: #6B7280;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: 0.25s ease;
  --max-width: 1200px;
}

/* ===== BASE ===== */
body {
  font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  color: var(--text-dark);
  background: var(--white);
}

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

/* ===== HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo img {
  height: 40px;
  width: auto;
}

/* ===== NAVIGATION ===== */
.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-dark);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.nav a:hover {
  color: var(--blue-primary);
  background: var(--blue-light);
}

.nav a.active {
  color: var(--blue-primary);
  background: var(--blue-light);
}

/* ===== BURGER ===== */
.burger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.burger span {
  display: block;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.burger.open span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

/* ===== MOBILE NAV ===== */
@media (max-width: 768px) {
  .burger { display: flex; }

  .nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--white);
    box-shadow: var(--shadow-md);
    padding: 12px 0;
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 14px 24px;
    border-radius: 0;
    font-size: 16px;
    border-bottom: 1px solid var(--gray-light);
  }
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--blue-primary);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--blue-dark);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--blue-primary);
  border-color: var(--blue-primary);
}

.btn-outline:hover {
  background: var(--blue-primary);
  color: var(--white);
  transform: translateY(-1px);
}

.btn-white {
  background: var(--white);
  color: var(--blue-primary);
}

.btn-white:hover {
  background: var(--blue-light);
  transform: translateY(-1px);
}

/* ===== SECTION HEADINGS ===== */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--gray-bg);
}

.section-title {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 640px;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header .section-subtitle {
  margin: 0 auto;
}

/* ===== FOOTER ===== */
.site-footer {
  background: #1A2B3C;
  color: rgba(255,255,255,0.85);
  padding: 56px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand .logo-footer img {
  height: 32px;
  width: auto;
  filter: brightness(0) invert(1);
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255,255,255,0.65);
  max-width: 260px;
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.5);
  margin-bottom: 16px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul li a {
  font-size: 14px;
  color: rgba(255,255,255,0.75);
  transition: color var(--transition);
}

.footer-col ul li a:hover {
  color: var(--white);
}

.footer-col .contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: rgba(255,255,255,0.75);
  margin-bottom: 10px;
}

.footer-col .contact-item svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--blue-primary);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}

.footer-bottom a {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  transition: color var(--transition);
}

.footer-bottom a:hover {
  color: var(--white);
}

/* ===== TAGS / BADGES ===== */
.badge {
  display: inline-block;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-blue {
  background: var(--blue-light);
  color: var(--blue-primary);
}

.badge-green {
  background: rgba(59,177,75,0.12);
  color: var(--green-accent);
}

/* ===== UTILITIES ===== */
.text-center { text-align: center; }
.text-blue { color: var(--blue-primary); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }