:root {
  /* Brand Colors */
  --primary-navy: #133E7C;
  --primary-teal: #37D6C2;
  --dark-gray: #1F2937;
  --text-body: #4B5563;
  --text-light: #6B7280;
  --light-gray-bg: #F6F8FB;
  --card-bg: #FFFFFF;
  --border-color: #E5E7EB;

  /* States */
  --state-error: #EF4444;
  --state-error-bg: #FEF2F2;
  --state-warning: #F59E0B;
  --state-warning-bg: #FFFBEB;
  --state-success: #10B981;
  --state-success-bg: #ECFDF5;

  /* Shadow & Radius */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  
  /* Layout */
  --max-width: 1200px;
}

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

body {
  font-family: var(--font-family);
  color: var(--dark-gray);
  background-color: var(--light-gray-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--primary-navy);
  font-weight: 700;
  line-height: 1.2;
}

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

a:hover {
  color: #2bbbb3;
}

ul {
  list-style: none;
}

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

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

/* Typography Utilities */
.text-center { text-align: center; }
.text-navy { color: var(--primary-navy); }
.text-teal { color: var(--primary-teal); }
.text-muted { color: var(--text-body); }
.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }

/* Flex & Grid Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }
.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .md\:flex-row { flex-direction: row; }
}

/* Margin & Padding Utilities */
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mt-8 { margin-top: 2rem; }
.py-12 { padding-top: 3rem; padding-bottom: 3rem; }
.py-20 { padding-top: 5rem; padding-bottom: 5rem; }
.pt-32 { padding-top: 8rem; } /* For content below fixed header */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  text-align: center;
}

.btn-primary {
  background-color: var(--primary-teal);
  color: white;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background-color: #2bbbb3;
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: transparent;
  color: var(--primary-navy);
  border: 2px solid var(--primary-navy);
}
.btn-secondary:hover {
  background-color: var(--primary-navy);
  color: white;
}

.btn-outline {
  background-color: white;
  color: var(--dark-gray);
  border: 1px solid var(--border-color);
}
.btn-outline:hover {
  background-color: var(--light-gray-bg);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  height: 72px;
  display: flex;
  align-items: center;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.logo-icon {
  height: 32px;
}
.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-navy);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  color: var(--text-body);
  font-weight: 500;
  font-size: 0.95rem;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--primary-navy);
}

.language-switcher {
  display: flex;
  align-items: center;
  gap: 8px;
}

.language-btn {
  appearance: none;
  border: 1px solid var(--border-color);
  background: white;
  color: var(--text-body);
  border-radius: 9999px;
  padding: 0.35rem 0.7rem;
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.language-btn:hover {
  border-color: var(--primary-teal);
  color: var(--primary-navy);
}

.language-btn.active {
  background: var(--primary-navy);
  border-color: var(--primary-navy);
  color: white;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--primary-navy);
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background-color: white;
    flex-direction: column;
    padding: 24px;
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--border-color);
  }
  .nav-links.show {
    display: flex;
  }
  .mobile-menu-btn {
    display: block;
  }
  .nav-links a {
    width: 100%;
    text-align: left;
    padding: 12px 0;
    border-bottom: 1px solid var(--light-gray-bg);
  }
  .nav-links .btn {
    margin-top: 12px;
    width: 100%;
  }
  .language-switcher {
    width: 100%;
    flex-wrap: wrap;
    margin-top: 12px;
  }
}

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Badges / Status Chips */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.badge-success { background-color: var(--state-success-bg); color: var(--state-success); }
.badge-warning { background-color: var(--state-warning-bg); color: var(--state-warning); }
.badge-error { background-color: var(--state-error-bg); color: var(--state-error); }
.badge-neutral { background-color: var(--light-gray-bg); color: var(--text-body); }

/* Highlighted Text */
.char-error {
  background-color: var(--state-error-bg);
  color: var(--state-error);
  border-bottom: 2px solid var(--state-error);
  padding: 0 2px;
  border-radius: 2px;
}
.char-warning {
  background-color: var(--state-warning-bg);
  color: var(--state-warning);
  border-bottom: 2px solid var(--state-warning);
  padding: 0 2px;
  border-radius: 2px;
}
.char-valid {
  color: var(--primary-navy);
}

/* Footer */
.footer {
  background-color: var(--primary-navy);
  color: white;
  padding: 64px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 48px;
}
@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}
.footer-brand .logo-text {
  color: white;
}
.footer-brand p {
  color: #9CA3AF;
  margin-top: 16px;
  max-width: 300px;
}
.footer h4 {
  color: white;
  margin-bottom: 16px;
  font-size: 1rem;
}
.footer ul li {
  margin-bottom: 12px;
}
.footer ul a {
  color: #9CA3AF;
}
.footer ul a:hover {
  color: white;
}
.footer-bottom {
  text-align: center;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.1);
  color: #9CA3AF;
  font-size: 0.875rem;
}

/* Sections Global */
section {
  padding: 80px 0;
}
.section-light {
  background-color: white;
}
.section-gray {
  background-color: var(--light-gray-bg);
}
.section-title {
  font-size: 2.25rem;
  margin-bottom: 1rem;
  text-align: center;
}
.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-body);
  text-align: center;
  max-width: 600px;
  margin: 0 auto 3rem;
}

/* Inputs & Forms */
.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 1rem;
  color: var(--dark-gray);
  transition: border-color 0.2s;
  background-color: white;
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--primary-teal);
  box-shadow: 0 0 0 3px rgba(55, 214, 194, 0.2);
}
.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--dark-gray);
}

/* Table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}
.data-table th, .data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
}
.data-table th {
  background-color: var(--light-gray-bg);
  font-weight: 600;
  color: var(--text-light);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.data-table tr:hover td {
  background-color: #F9FAFB;
}

/* Tabs */
.tabs-header {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  overflow-x: auto;
  gap: 2rem;
  margin-bottom: 24px;
}
.tab-btn {
  background: none;
  border: none;
  padding: 12px 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-light);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}
.tab-btn:hover {
  color: var(--primary-navy);
}
.tab-btn.active {
  color: var(--primary-navy);
  border-bottom-color: var(--primary-teal);
}
.tab-content {
  display: none;
}
.tab-content.active {
  display: block;
}