/* =====================================================================
   Variables
   ===================================================================== */
:root {
  /* Color Palette */
  --color-background: #f6f7fa;
  --color-surface: #ffffff;
  --color-text: #16202a;
  --color-primary: #2374ab;
  --color-primary-hover: #175684;
  --color-success: #258944;
  --color-warning: #e5a100;
  --color-danger: #d9383a;
  /* Neutral grays */
  --gray-100: #f1f3f6;
  --gray-200: #e3e5ea;
  --gray-300: #c3c7cf;
  --gray-400: #9ea3ae;
  --gray-500: #6d7583;
  --gray-600: #455062;
  --gray-700: #293043;
  /* Typography */
  --font-sans: 'Inter', 'Segoe UI', Arial, Helvetica, sans-serif;
  --font-mono: 'Fira Mono', 'Consolas', 'Menlo', monospace;
  --font-size-xs: 0.8125rem;    /* 13px */
  --font-size-sm: 0.9375rem;    /* 15px */
  --font-size-base: 1rem;       /* 16px */
  --font-size-md: 1.125rem;     /* 18px */
  --font-size-lg: 1.375rem;     /* 22px */
  --font-size-xl: 2.125rem;     /* 34px */
  --line-height-tight: 1.15;
  --line-height-base: 1.6;
  --line-height-loose: 1.85;
  /* Spacing (0 – 96px) */
  --space-0: 0;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-8: 48px;
  --space-12: 64px;
  --space-16: 96px;
  /* Radius, Shadows, Transitions */
  --radius-xs: 3px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --shadow-sm: 0 1px 4px rgba(22,32,42,0.05);
  --shadow-md: 0 4px 16px rgba(22,32,42,0.10);
  --transition-fast: 120ms cubic-bezier(.4,0,.2,1);
  --transition-base: 260ms cubic-bezier(.4,0,.2,1);
}

/* =====================================================================
   Reset & Normalize
   ===================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  background-color: var(--color-background);
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  color: var(--color-text);
  background: var(--color-background);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  margin-top: 0;
  margin-bottom: var(--space-3);
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

h1 { text-align: center; font-size: var(--font-size-xl); }
h2 { text-align: center; font-size: var(--font-size-lg); margin-bottom: 21px;}
h3 { text-align: center; font-size: var(--font-size-md); }
h4 { font-size: 1.05rem; }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-sm); }

p {
  text-align: center;
  margin: 14px auto;
  max-width: 100%;
  line-height: var(--line-height-loose);
  color: var(--color-text);
}
.button-main {
  width: 40%;
  text-align: center;
  display: block !important;
  margin: 11px auto !important;
}
.button-main-right {
  float: right;
  margin-top: 21px;
}
ul, ol {
  list-style: inside !important;
  text-align: center;
  margin-top: 0;
  margin-bottom: var(--space-4);
  padding-left: var(--space-5);
  color: var(--color-text);
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
  box-shadow: none;
  margin: 0;
  padding: 0;
  border-radius: 0;
  min-width: 0;
}

/* Remove default button styles for cross-browser consistency */
button {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: inherit;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-position: under;
  transition: color var(--transition-fast);
}
a:hover, a:focus-visible {
  color: var(--color-primary-hover);
  text-decoration-thickness: 2px;
}
a:focus-visible {
  outline: 2px dashed var(--color-primary);
  outline-offset: 2px;
}

hr {
  border: none;
  border-top: 1px solid var(--gray-200);
  margin: var(--space-6) 0;
}

/* Improve media defaults */
iframe {
  max-width: 100%;
}

/* Motion preferences */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    transition: none !important;
    animation-duration: 0s !important;
  }
}

/* =====================================================================
   Utilities
   ===================================================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.flex {
  display: flex !important;
}
.flex-center {
  display: flex !important;
  align-items: center;
  justify-content: center;
}
.grid {
  display: grid !important;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* Spacing helpers */
.mt-4 { margin-top: var(--space-4) !important; }
.mb-4 { margin-bottom: var(--space-4) !important; }
.p-4  { padding: var(--space-4) !important; }
.pl-4 { padding-left: var(--space-4) !important; }
.pr-4 { padding-right: var(--space-4) !important; }
.pt-4 { padding-top: var(--space-4) !important; }
.pb-4 { padding-bottom: var(--space-4) !important; }

/* =====================================================================
   Components
   ===================================================================== */
/* Button */
.button, button, [type="button"], [type="submit"] {
  padding: 0.5em 1.25em;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: #fff;
  font-size: var(--font-size-base);
  font-weight: 600;
  line-height: 1.25;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
  display: inline-block;
}
.button:hover, button:hover, [type="button"]:hover, [type="submit"]:hover {
  background: var(--color-primary-hover);
}
.button:focus-visible, button:focus-visible, [type="button"]:focus-visible, [type="submit"]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.button:disabled, button:disabled, [type="button"]:disabled,
[type="submit"]:disabled {
  opacity: 0.6;
  pointer-events: none;
  background: var(--gray-300);
  color: var(--gray-600);
}

/* Input */
input, textarea, select {
  width: 100%;
  padding: var(--space-3);
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-xs);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  font-size: var(--font-size-base);
  font-family: var(--font-sans);
  margin-bottom: var(--space-4);
  box-sizing: border-box;
}
input:focus, textarea:focus, select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(35,116,171,.10);
}
input:disabled, textarea:disabled, select:disabled {
  background: var(--gray-200);
  color: var(--gray-500);
  opacity: 0.7;
}

/* Card */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: var(--space-5);
  margin-bottom: var(--space-6);
  transition: box-shadow var(--transition-fast);
}
.card:hover, .card:focus-within {
  box-shadow: 0 8px 32px rgba(35,116,171,0.12);
}

/* Elevation for education/infographic sections */
.info-block {
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-sm);
}

/* =====================================================================
   Accessibility focus-visible pattern for all interactive elements
   ===================================================================== */
a, button, [tabindex], input, textarea, select, summary {
  &:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
  }
}

/* =====================================================================
   Header & Footer styles
   ===================================================================== */

/* Header styles */
.main-header {
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 40;
}
.flex-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
}
.site-logo {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: .5px;
  text-decoration: none;
  display: flex;
  align-items: center;
}

/* Navigation menu */
.main-nav {
  position: relative;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  min-width: 44px;
  padding: 0;
}
.nav-toggle-bar {
  width: 28px;
  height: 3px;
  background: var(--color-primary);
  border-radius: var(--radius-xs);
  transition: all 0.22s;
}
.nav-menu {
  display: flex;
  gap: 32px;
  list-style: none !important;
  background: none;
  margin: 0;
  padding: 0;
  align-items: center;
}
.nav-menu li {
  margin: 0;
}
.nav-menu a {
  font-size: var(--font-size-base);
  font-weight: 500;
  text-decoration: none;
  color: var(--color-text);
  background: none;
  border-radius: var(--radius-xs);
  padding: 8px 4px;
  transition: background var(--transition-fast);
}
.nav-menu a:hover,
.nav-menu a:focus-visible {
  background: var(--gray-200);
  color: var(--color-primary);
}

@media (max-width: 950px) {
  .nav-menu {
    gap: 12px;
  }
}
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  .nav-menu {
    /* Hidden as overlay for mobile */
    position: absolute;
    top: 100%;
    right: 0;
    left: auto;
    width: 100% !important;
    flex-direction: column;
    gap: 0;
    background: var(--color-surface);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-md);
    padding: 8px 0;
    z-index: 100;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-4px);
    transition: visibility 0.18s, opacity 0.18s, transform 0.18s;
  }
  .nav-menu.open {
    width: 100% !important;
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }
  .nav-menu li {
    max-width: 100%;
    width: 100%;
  }
  .nav-menu a {
    display: block;
    width: 100%;
    padding: 12px 24px;
  }
}

/* Footer styles */
.site-footer {
  background: var(--gray-200);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  padding-bottom: var(--space-4);
}
.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: var(--space-5);
  align-items: flex-start;
  flex-wrap: wrap;
}
.footer-branding {
  flex: 1 1 auto;
  min-width: 160px;
  margin-bottom: var(--space-4);
}
.footer-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
}
.footer-nav, .footer-legal {
  flex: 1 1 200px;
}
.footer-nav ul, .footer-legal ul {
  list-style: none !important;
  text-align: left !important;
  padding: 0;
  margin: 0;
}
.footer-nav li, .footer-legal li {
  margin-bottom: var(--space-3);
}
.footer-nav a, .footer-legal a {
  color: var(--color-text);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}
.footer-nav a:hover, .footer-legal a:hover, .footer-nav a:focus-visible, .footer-legal a:focus-visible {
  color: var(--color-primary-hover);
  text-decoration: underline;
}
.copyright {
  text-align: center;
  margin-top: var(--space-4);
  font-size: var(--font-size-xs);
  color: var(--gray-600);
}
@media (max-width: 700px) {
  .footer-grid {
    flex-direction: column;
    gap: var(--space-4);
    align-items: flex-start;
  }
}

/* =====================================================================
   Cookie Consent Banner
   ===================================================================== */
.cookie-consent-banner {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-surface);
  box-shadow: 0 -2px 20px rgba(35,116,171,0.09);
  padding: var(--space-4) 0;
  z-index: 2000;
  border-top: 1px solid var(--gray-200);
  font-size: var(--font-size-sm);
  transition: transform 0.26s;
}
.cookie-content {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
  justify-content: space-between;
}
.cookie-actions {
  display: flex;
  gap: var(--space-2);
}
.button-reject {
  background: var(--gray-300);
  color: var(--color-text);
}
.button-reject:hover,
.button-reject:focus-visible {
  background: var(--gray-400);
}
@media (max-width: 600px) {
  .cookie-content {
    flex-direction: column;
    gap: var(--space-4);
    align-items: stretch;
  }
  .cookie-actions {
    flex-direction: row;
    justify-content: flex-start;
    gap: var(--space-2);
  }
}

/* =====================================================================
   Responsive
   ===================================================================== */
@media (max-width: 768px) {
  .container {
    padding-left: var(--space-2);
    padding-right: var(--space-2);
  }
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.25rem; }
  h3 { font-size: 1rem; }
}