@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
  --nha-primary: #0D9488;
  --nha-primary-dark: #0F766E;
  --nha-secondary: #0F766E;
  --nha-accent: #F59E0B;
  --nha-accent-hover: #D97706;
  --nha-neutral-900: #111827;
  --nha-neutral-700: #374151;
  --nha-neutral-500: #6B7280;
  --nha-neutral-300: #D1D5DB;
  --nha-neutral-100: #F3F4F6;
  --nha-neutral-50: #F9FAFB;
  --nha-white: #FFFFFF;
  --nha-gradient: linear-gradient(135deg, #0D9488 0%, #059669 100%);
  --nha-gradient-soft: linear-gradient(180deg, rgba(13, 148, 136, 0.08) 0%, rgba(5, 150, 105, 0.04) 100%);
  --nha-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --nha-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  --nha-shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.12);
  --nha-radius: 12px;
  --nha-radius-sm: 8px;
  --nha-font: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --nha-line-height: 1.6;
  --nha-line-height-tight: 1.4;
  --nha-max-width: 1200px;
  --nha-header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--nha-font);
  font-size: 16px;
  line-height: var(--nha-line-height);
  color: var(--nha-neutral-700);
  background-color: var(--nha-white);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  color: var(--nha-neutral-900);
  line-height: var(--nha-line-height-tight);
}

h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p {
  margin-bottom: 1rem;
}

a {
  color: var(--nha-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--nha-primary-dark);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

.nha-container {
  width: 100%;
  max-width: var(--nha-max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.nha-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nha-header-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: var(--nha-shadow-sm);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  transition: box-shadow 0.3s ease;
}

.nha-header.nha-header-scrolled {
  box-shadow: var(--nha-shadow);
}

.nha-header-inner {
  width: 100%;
  max-width: var(--nha-max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nha-logo {
  width: 180px;
  height: 60px;
  background-image: url('../img/company-logo.svg');
  background-repeat: no-repeat;
  background-size: contain;
  background-position: center;
  flex-shrink: 0;
}

.nha-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nha-nav a {
  color: var(--nha-neutral-700);
  font-weight: 500;
  font-size: 0.9375rem;
  position: relative;
}

.nha-nav a:hover,
.nha-nav a.nha-nav-active {
  color: var(--nha-primary);
}

.nha-nav a.nha-nav-active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--nha-gradient);
  border-radius: 1px;
}

.nha-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-family: var(--nha-font);
  font-size: 0.9375rem;
  font-weight: 600;
  border: none;
  border-radius: var(--nha-radius-sm);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.nha-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--nha-shadow);
}

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

.nha-btn-primary:hover {
  opacity: 0.95;
}

.nha-btn-outline {
  background: transparent;
  color: var(--nha-primary);
  border: 2px solid var(--nha-primary);
}

.nha-btn-outline:hover {
  background: rgba(13, 148, 136, 0.08);
}

.nha-footer {
  background: var(--nha-neutral-900);
  color: var(--nha-neutral-300);
  padding: 64px 0 24px;
}

.nha-footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.nha-footer-logo {
  width: 160px;
  height: 53px;
  background-image: url('../img/company-logo.svg');
  background-repeat: no-repeat;
  background-size: contain;
  background-position: left center;
  margin-bottom: 16px;
  opacity: 0.95;
}

.nha-footer-desc {
  font-size: 0.875rem;
  line-height: 1.7;
  max-width: 280px;
}

.nha-footer-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--nha-white);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nha-footer-links a {
  color: var(--nha-neutral-300);
  font-size: 0.875rem;
  display: block;
  margin-bottom: 10px;
}

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

.nha-footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.8125rem;
  text-align: center;
  color: var(--nha-neutral-500);
}

.nha-cookies-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--nha-neutral-900);
  color: var(--nha-neutral-300);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  z-index: 999;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
  transform: translateY(100%);
  transition: transform 0.4s ease;
}

.nha-cookies-bar.nha-cookies-visible {
  transform: translateY(0);
}

.nha-cookies-text {
  font-size: 0.875rem;
  line-height: 1.5;
  flex: 1;
}

.nha-cookies-text a {
  color: var(--nha-primary);
  text-decoration: underline;
}

.nha-cookies-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.nha-cookies-actions .nha-btn {
  padding: 10px 20px;
  font-size: 0.875rem;
}

.nha-section {
  padding: 80px 0;
}

.nha-section-alt {
  background: var(--nha-neutral-50);
}

.nha-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.nha-mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--nha-neutral-700);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
}

@media (max-width: 768px) {
  .nha-mobile-menu-btn {
    display: block;
  }
  
  .nha-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--nha-white);
    flex-direction: column;
    align-items: stretch;
    padding: 24px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    display: none;
    gap: 0;
  }
  
  .nha-nav.nha-nav-open {
    display: flex;
  }
  
  .nha-nav a {
    padding: 12px 0;
    border-bottom: 1px solid var(--nha-neutral-200);
  }
  
  .nha-nav a:last-child {
    border-bottom: none;
  }
  
  .nha-header-cta {
    display: none;
  }
  
  .nha-footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    text-align: center;
  }
  .nha-footer-logo {
    margin-left: auto;
    margin-right: auto;
    background-position: center;
  }
  .nha-footer-desc {
    margin: 0 auto;
  }
  .nha-cookies-bar {
    flex-direction: column;
    text-align: center;
  }
}