:root {
  --bg-primary: #F8FAFC;
  --bg-secondary: #EEF4F8;
  --header-footer-bg: #111827;
  --primary-color: #0F766E;
  --accent-color: #2563EB;
  --accent-secondary: #F59E0B;
  --card-bg: #FFFFFF;
  --border-color: #00E5FF;
  --hover-border: #00FFFF;
  --highlight-section: #ECFDF5;
  --highlight-secondary: #EFF6FF;
  --text-main: #1F2937;
  --text-secondary: #64748B;
  --text-dim: #94A3B8;
  --success: #16A34A;
  --warning: #D97706;
  --btn-primary-bg: #0F766E;
  --btn-primary-hover: #115E59;
  --btn-secondary-bg: #FFFFFF;
  --btn-secondary-border: #00E5FF;
  --btn-secondary-hover-border: #00FFFF;
  --card-radius: 18px;
  --transition-speed: 0.3s;
}

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

body {
  font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  font-size: 16px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Accessibility: Skip Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--accent-color);
  color: white;
  padding: 8px 16px;
  z-index: 1000;
  transition: top var(--transition-speed);
}
.skip-link:focus {
  top: 0;
}

/* Keyboard Focus Highlights */
:focus-visible {
  outline: 3px solid var(--hover-border);
  outline-offset: 2px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.2;
}
h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
p { margin-bottom: 1rem; color: var(--text-secondary); }
a { color: var(--accent-color); text-decoration: none; transition: color var(--transition-speed); }
a:hover { color: var(--primary-color); }

/* Layout & Grid */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
.grid {
  display: grid;
  gap: 24px;
}
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }

/* Header & Navigation */
header {
  background-color: var(--header-footer-bg);
  color: #FFFFFF;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}
.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
}
.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: #FFFFFF;
}
.logo:hover { color: var(--bg-secondary); }
.nav-links {
  display: flex;
  gap: 20px;
  list-style: none;
}
.nav-links a {
  color: #FFFFFF;
  font-weight: 500;
}
.nav-links a:hover {
  color: var(--accent-secondary);
}
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: #FFFFFF;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Main Content */
main {
  flex: 1;
  padding: 40px 0;
}

/* Sections */
section {
  margin-bottom: 60px;
}
.bg-secondary { background-color: var(--bg-secondary); padding: 40px 0; }
.bg-highlight { background-color: var(--highlight-section); padding: 40px 0; border-radius: var(--card-radius); }
.bg-highlight-2 { background-color: var(--highlight-secondary); padding: 40px 0; border-radius: var(--card-radius); }

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: var(--card-radius);
  padding: 24px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-speed), border-color var(--transition-speed), box-shadow var(--transition-speed);
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--hover-border);
  box-shadow: 0 0 12px rgba(0, 255, 255, 0.4), 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}
.card h3 { margin-bottom: 12px; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-speed);
  border: 1px solid transparent;
}
.btn-primary {
  background-color: var(--btn-primary-bg);
  color: #FFFFFF;
}
.btn-primary:hover {
  background-color: var(--btn-primary-hover);
  color: #FFFFFF;
}
.btn-secondary {
  background-color: var(--btn-secondary-bg);
  color: var(--text-main);
  border-color: var(--btn-secondary-border);
}
.btn-secondary:hover {
  border-color: var(--btn-secondary-hover-border);
  color: var(--accent-color);
  box-shadow: 0 0 8px rgba(0, 255, 255, 0.4);
}

/* Comparison Tables */
.table-wrapper {
  overflow-x: auto;
  background: var(--card-bg);
  border-radius: var(--card-radius);
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}
table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}
th, td {
  padding: 16px;
  border-bottom: 1px solid var(--border-color);
}
th {
  background-color: var(--bg-secondary);
  color: var(--text-main);
  font-weight: 600;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background-color: var(--bg-primary); }

/* Forms */
.form-group {
  margin-bottom: 20px;
}
label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}
input, textarea, select {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  transition: all var(--transition-speed);
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--hover-border);
  box-shadow: 0 0 8px rgba(0, 255, 255, 0.5);
}

/* FAQ Accordion */
.accordion-item {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: 12px;
  background: var(--card-bg);
  transition: border-color var(--transition-speed);
}
.accordion-item:hover {
  border-color: var(--hover-border);
}
.accordion-header {
  width: 100%;
  padding: 16px;
  text-align: left;
  background: none;
  border: none;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.accordion-content {
  padding: 0 16px;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-speed) ease-out, padding var(--transition-speed) ease;
}
.accordion-item.active .accordion-content {
  padding: 0 16px 16px;
  max-height: 500px;
}

/* Alerts / Notices */
.notice {
  padding: 16px;
  border-radius: 8px;
  margin-bottom: 24px;
}
.notice-info { background-color: var(--highlight-secondary); border-left: 4px solid var(--border-color); }
.notice-warning { background-color: #FEF3C7; border-left: 4px solid var(--warning); color: #92400E; }
.notice-success { background-color: #DCFCE7; border-left: 4px solid var(--success); color: #166534; }

/* Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: var(--header-footer-bg);
  color: #FFFFFF;
  padding: 20px;
  z-index: 1000;
  display: none;
  box-shadow: 0 -4px 6px rgba(0,0,0,0.1);
  border-top: 1px solid var(--border-color);
}
.cookie-banner p { color: #E2E8F0; margin-bottom: 16px; }
.cookie-buttons { display: flex; gap: 12px; flex-wrap: wrap; }

/* Footer */
footer {
  background-color: var(--header-footer-bg);
  color: #94A3B8;
  padding: 40px 0 20px;
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  margin-bottom: 40px;
}
.footer-col h4 { color: #FFFFFF; margin-bottom: 16px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul a { color: #94A3B8; }
.footer-col ul a:hover { color: #FFFFFF; }
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
  text-align: center;
  font-size: 0.9rem;
}

/* Utilities */
.text-center { text-align: center; }
.mb-4 { margin-bottom: 1rem; }
.mb-8 { margin-bottom: 2rem; }
.mt-4 { margin-top: 1rem; }
.mt-8 { margin-top: 2rem; }

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--header-footer-bg);
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
  }
  .nav-links.active { display: flex; }
  .mobile-menu-btn { display: block; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
}

/* Print Styles */
@media print {
  .no-print, header, footer, .cookie-banner { display: none !important; }
  body { background: #fff; color: #000; }
  .card, .table-wrapper { box-shadow: none; border: 1px solid #ccc; }
  a { text-decoration: underline; color: #000; }
}