/* ============================================
   KNWU Actiewebsite – Sport Telt
   Globale stijlen & huisstijl
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* KNWU Huisstijl */
  --knwu-oranje: #FF6600;
  --knwu-oranje-hover: #E55C00;
  --knwu-oranje-light: #FFF0E6;
  --knwu-blauw: #003082;
  --knwu-blauw-hover: #002468;
  --knwu-blauw-light: #E6EBF3;

  /* Neutrals */
  --wit: #FFFFFF;
  --grijs-50: #F9FAFB;
  --grijs-100: #F3F4F6;
  --grijs-200: #E5E7EB;
  --grijs-300: #D1D5DB;
  --grijs-400: #9CA3AF;
  --grijs-500: #6B7280;
  --grijs-600: #4B5563;
  --grijs-700: #374151;
  --grijs-800: #1F2937;
  --grijs-900: #111827;

  /* Feedback */
  --success: #059669;
  --success-light: #ECFDF5;
  --error: #DC2626;
  --error-light: #FEF2F2;

  /* Typography */
  --font-body: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* Layout */
  --container-max: 1200px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--grijs-800);
  background-color: var(--wit);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--knwu-blauw);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--knwu-oranje);
}

a:focus-visible {
  outline: 2px solid var(--knwu-oranje);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--knwu-blauw);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: var(--space-md);
}

p:last-child {
  margin-bottom: 0;
}

.lead {
  font-size: 1.25rem;
  color: var(--grijs-600);
  line-height: 1.5;
}

.text-oranje { color: var(--knwu-oranje); }
.text-blauw { color: var(--knwu-blauw); }
.text-center { text-align: center; }

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

main {
  flex: 1;
  padding-top: var(--header-height);
}

.section {
  padding: var(--space-3xl) 0;
}

.section--alt {
  background-color: var(--grijs-50);
}

/* --- Header --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--wit);
  border-bottom: 2px solid var(--knwu-oranje);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

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

.header-logo img {
  height: 44px;
  width: auto;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.header-nav a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--grijs-700);
  padding: var(--space-xs) 0;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.header-nav a:hover,
.header-nav a.active {
  color: var(--knwu-oranje);
  border-bottom-color: var(--knwu-oranje);
}

.header-nav a:focus-visible {
  outline: 2px solid var(--knwu-oranje);
  outline-offset: 4px;
}

/* Hamburger menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  color: var(--knwu-blauw);
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  margin: 5px 0;
  transition: all var(--transition-base);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Footer --- */
.site-footer {
  background: var(--knwu-blauw);
  color: var(--wit);
  padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.footer-brand img {
  height: 40px;
  margin-bottom: var(--space-sm);
  filter: brightness(0) invert(1);
}

.footer-brand p {
  font-size: 0.875rem;
  opacity: 0.8;
}

.footer-links h4 {
  color: var(--wit);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  display: block;
  font-size: 0.875rem;
  padding: var(--space-xs) 0;
}

.footer-links a:hover {
  color: var(--knwu-oranje);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  margin-top: var(--space-xl);
  padding-top: var(--space-md);
  text-align: center;
  font-size: 0.8rem;
  opacity: 0.7;
}

/* --- Cookie Banner --- */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2000;
  background: var(--grijs-900);
  color: var(--wit);
  padding: var(--space-lg);
  transform: translateY(100%);
  transition: transform var(--transition-slow);
}

.cookie-banner.visible {
  transform: translateY(0);
}

.cookie-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.cookie-inner p {
  flex: 1;
  font-size: 0.9rem;
}

.cookie-inner a {
  color: var(--knwu-oranje);
  text-decoration: underline;
}

.cookie-buttons {
  display: flex;
  gap: var(--space-sm);
}

/* --- Toast Notifications --- */
.toast {
  position: fixed;
  top: calc(var(--header-height) + var(--space-md));
  right: var(--space-md);
  z-index: 3000;
  background: var(--success);
  color: var(--wit);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  transform: translateX(120%);
  transition: transform var(--transition-base);
  max-width: 400px;
  font-size: 0.9rem;
}

.toast.visible {
  transform: translateX(0);
}

.toast--error {
  background: var(--error);
}

.toast--info {
  background: var(--knwu-blauw);
}

/* --- Skip Link (Accessibility) --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  background: var(--knwu-blauw);
  color: var(--wit);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  z-index: 9999;
  font-weight: 600;
}

.skip-link:focus {
  top: var(--space-sm);
}

/* --- Utility Classes --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hidden {
  display: none !important;
}