/* Custom CSS Stylesheet for Vědecký portál o zdraví a prevenci */
:root {
  --cz-blue: #11457E;
  --cz-blue-dark: #0A2D54;
  --cz-red: #D7141A;
  --cz-red-hover: #B50F15;
  --cz-white: #FFFFFF;
  --bg-light: #F8FAFC;
  --bg-card: #FFFFFF;
  --text-dark: #0F172A;
  --text-muted: #475569;
  --border-color: #E2E8F0;
  --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);
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  color: var(--text-dark);
  background-color: var(--bg-light);
  line-height: 1.6;
}

/* Header & Czech Flag Tricolor Accent Bar */
.cz-tricolor-bar {
  height: 4px;
  background: linear-gradient(90deg, var(--cz-white) 0%, var(--cz-white) 33%, var(--cz-red) 33%, var(--cz-red) 66%, var(--cz-blue) 66%, var(--cz-blue) 100%);
  border-bottom: 1px solid var(--border-color);
}

.google-ads-disclaimer-bar {
  background-color: var(--cz-blue-dark);
  color: #E2E8F0;
  font-size: 0.8125rem;
  padding: 0.5rem 1rem;
  text-align: center;
}

.nav-link {
  color: var(--text-dark);
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  border-radius: 0.375rem;
  transition: all 0.2s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--cz-blue);
  background-color: rgba(17, 69, 126, 0.08);
}

.btn-primary {
  background-color: var(--cz-blue);
  color: var(--cz-white);
  padding: 0.625rem 1.25rem;
  border-radius: 0.375rem;
  font-weight: 600;
  transition: background-color 0.2s ease;
  display: inline-block;
}

.btn-primary:hover {
  background-color: var(--cz-blue-dark);
}

.btn-accent {
  background-color: var(--cz-red);
  color: var(--cz-white);
  padding: 0.625rem 1.25rem;
  border-radius: 0.375rem;
  font-weight: 600;
  transition: background-color 0.2s ease;
  display: inline-block;
}

.btn-accent:hover {
  background-color: var(--cz-red-hover);
}

.btn-outline {
  border: 2px solid var(--cz-blue);
  color: var(--cz-blue);
  padding: 0.5rem 1.125rem;
  border-radius: 0.375rem;
  font-weight: 600;
  transition: all 0.2s ease;
  display: inline-block;
}

.btn-outline:hover {
  background-color: var(--cz-blue);
  color: var(--cz-white);
}

/* Badge styles */
.badge-certified {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.75rem;
  background-color: rgba(17, 69, 126, 0.1);
  color: var(--cz-blue);
  border: 1px solid rgba(17, 69, 126, 0.2);
  border-radius: 9999px;
  font-size: 0.8125rem;
  font-weight: 600;
}

/* Card components */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Certificate Seal Widget */
.cert-seal {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  border: 3px double var(--cz-blue);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: radial-gradient(circle, #ffffff 60%, #F1F5F9 100%);
  box-shadow: 0 4px 10px rgba(0,0,0,0.05);
  margin: 0 auto;
  padding: 0.5rem;
}

.cert-seal span.title {
  font-size: 0.65rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--cz-blue);
  line-height: 1.1;
}

.cert-seal span.val {
  font-size: 0.9rem;
  font-weight: 900;
  color: var(--cz-red);
  margin-top: 0.15rem;
}

/* Quiz Container */
.quiz-box {
  background: white;
  border-radius: 1rem;
  border: 2px solid var(--border-color);
  padding: 2rem;
}

.quiz-option {
  border: 1px solid var(--border-color);
  padding: 0.875rem 1rem;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.quiz-option:hover, .quiz-option.selected {
  border-color: var(--cz-blue);
  background-color: rgba(17, 69, 126, 0.04);
}

/* Footer Styling */
footer {
  background-color: var(--cz-blue-dark);
  color: #94A3B8;
  border-top: 4px solid var(--cz-red);
}

footer a {
  color: #CBD5E1;
  transition: color 0.2s ease;
}

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

/* Cookie Banner Modal */
#cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: #0F172A;
  color: #F8FAFC;
  padding: 1.25rem;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.25);
  z-index: 9999;
}