/* ==========================================================================
   Philip O'Donnell Charitable Trust - Modernized 2026 Stylesheet
   ========================================================================== */

:root {
  /* Primary colours */
  --color-primary: #0F766E;
  --color-primary-dark: #0d5d56;
  --color-primary-light: #ccf2f0;
  
  /* Accent colours */
  --color-accent: #F59E0B;
  --color-accent-dark: #d97706;
  --color-accent-light: #fef3c7;
  
  /* Background & Surface */
  --color-background: #F8FAFC;
  --color-surface: #FFFFFF;
  
  /* Text colours */
  --color-text: #0F172A;
  --color-text-muted: #475569;
  
  /* Neutrals */
  --color-neutral-900: #0F172A;
  --color-neutral-800: #1e293b;
  --color-neutral-700: #334155;
  --color-neutral-600: #475569;
  --color-neutral-500: #64748b;
  --color-neutral-400: #94a3b8;
  --color-neutral-300: #cbd5e1;
  --color-neutral-200: #E2E8F0;
  --color-neutral-100: #f1f5f9;
  --color-neutral-50: #f8fafc;
  --color-white: #FFFFFF;
  
  /* Status colours */
  --color-success: #16A34A;
  --color-error: #DC2626;
  --color-warning: #F59E0B;
  
  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Roboto, sans-serif;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  
  /* Borders */
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  --radius-card: 1rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  
  /* Layout */
  --container-max: 1280px;
  
  /* Focus */
  --focus-ring: 0 0 0 3px rgba(15, 118, 110, 0.4);
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-fast: 0ms;
    --transition-base: 0ms;
  }
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-background);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
}

h1 { font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl)); margin-bottom: var(--space-6); }
h2 { font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-4xl)); margin-bottom: var(--space-4); }
h3 { font-size: clamp(var(--font-size-xl), 3vw, var(--font-size-2xl)); margin-bottom: var(--space-3); }

p { margin-bottom: var(--space-4); color: var(--color-text-muted); }

a { color: var(--color-primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-primary-dark); }
a:focus-visible { outline: none; box-shadow: var(--focus-ring); border-radius: var(--radius-md); }

.container { width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-6); }

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-weight: 600;
  z-index: 9999;
}

.skip-link:focus { top: var(--space-4); }

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-neutral-200);
  padding: var(--space-4) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  padding: var(--space-2) 0;
}

.logo-img {
  height: 120px;
  width: auto;
  max-width: 250px;
  object-fit: contain;
}

@media (max-width: 768px) {
  .logo-img {
    height: 90px;
    max-width: 180px;
  }
}

.main-nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.main-nav a {
  display: block;
  padding: var(--space-2) var(--space-4);
  color: var(--color-text-muted);
  font-weight: 500;
  border-radius: var(--radius-full);
}

.main-nav a:hover { color: var(--color-primary); background: var(--color-primary-light); }
.main-nav a.active { color: var(--color-primary); background: var(--color-primary-light); font-weight: 600; }

.menu-toggle { display: none; background: none; border: none; padding: var(--space-2); cursor: pointer; font-size: 1.5rem; border-radius: var(--radius-md); }
.menu-toggle:focus-visible { box-shadow: var(--focus-ring); }

.main-content { flex: 1; padding: var(--space-12) 0; }

.hero {
  padding: var(--space-16) 0;
  text-align: center;
  background: var(--color-background);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  margin-bottom: var(--space-12);
  position: relative;
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(15, 118, 110, 0.9) 0%, rgba(13, 93, 86, 0.95) 100%);
  z-index: 1;
}

.hero > * {
  position: relative;
  z-index: 2;
}

.hero-title { color: var(--color-white); margin-bottom: var(--space-4); text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2); }
.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-white);
  max-width: 700px;
  margin: 0 auto var(--space-8);
  line-height: 1.7;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}

.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-4); justify-content: center; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-neutral-200);
}

.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.card-image { width: 100%; height: 200px; object-fit: cover; }

.card-content { padding: var(--space-6); flex-grow: 1; display: flex; flex-direction: column; }

.card-title { font-size: var(--font-size-xl); margin-bottom: var(--space-3); color: var(--color-text); }
.card-text { color: var(--color-text-muted); margin-bottom: var(--space-4); flex-grow: 1; }
.card-link { display: inline-flex; align-items: center; gap: var(--space-2); font-weight: 600; color: var(--color-primary); margin-top: auto; }

.card-accent { background: var(--color-white); color: var(--color-text); border: 2px solid var(--color-primary); }
.card-accent .card-title, .card-accent .card-text { color: var(--color-text); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }

.btn-primary { background: var(--color-primary); color: var(--color-white); border-color: var(--color-primary); }
.btn-primary:hover { background: var(--color-primary-dark); border-color: var(--color-primary-dark); color: var(--color-white); transform: translateY(-1px); }

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

.btn-accent { background: var(--color-accent); color: var(--color-text); border-color: var(--color-accent); }
.btn-accent:hover { background: var(--color-accent-dark); border-color: var(--color-accent-dark); color: var(--color-white); }

.btn-lg { padding: var(--space-4) var(--space-8); font-size: var(--font-size-lg); }

.form-group { margin-bottom: var(--space-6); }
.form-label { display: block; font-weight: 600; margin-bottom: var(--space-2); color: var(--color-text); }
.form-control {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--color-neutral-200);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
  background: var(--color-surface);
}

.form-control:focus { outline: none; border-color: var(--color-primary); box-shadow: var(--focus-ring); }
.form-control.error { border-color: var(--color-error); }
.form-text { font-size: 0.875rem; color: var(--color-text-muted); margin-top: var(--space-2); }
.form-actions { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-top: var(--space-8); }

.checkbox-group, .radio-group { display: flex; align-items: flex-start; gap: var(--space-3); }
.checkbox-group input, .radio-group input { width: 20px; height: 20px; margin-top: 2px; accent-color: var(--color-primary); }
.checkbox-group label, .radio-group label { font-weight: 400; cursor: pointer; }

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-surface);
  padding: var(--space-6);
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.1);
  z-index: 9999;
  transform: translateY(100%);
  opacity: 0;
  transition: all var(--transition-base);
}

.cookie-banner.show { transform: translateY(0); opacity: 1; }
.cookie-content { max-width: var(--container-max); margin: 0 auto; display: flex; flex-direction: column; gap: var(--space-4); }

@media (min-width: 768px) {
  .cookie-content { flex-direction: row; align-items: center; justify-content: space-between; }
}

.cookie-text h3 { font-size: var(--font-size-lg); margin-bottom: var(--space-2); color: var(--color-text); }
.cookie-text p { color: var(--color-text-muted); margin: 0; }
.cookie-actions { display: flex; gap: var(--space-3); }

.accessibility-controls { position: fixed; top: 100px; right: 20px; z-index: 1000; display: flex; flex-direction: column; gap: var(--space-2); }

.accessibility-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-fast);
}

.accessibility-btn:hover { background: var(--color-primary-dark); transform: scale(1.05); }
.accessibility-btn:focus-visible { box-shadow: var(--focus-ring); }

.site-footer {
  background: var(--color-text);
  color: var(--color-white);
  padding: var(--space-12) 0 var(--space-8);
  margin-top: auto;
}

.footer-content { display: grid; grid-template-columns: 1fr; gap: var(--space-8); margin-bottom: var(--space-8); }

@media (min-width: 640px) {
  .footer-content { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .footer-content { grid-template-columns: 2fr 1fr 1fr 2fr; }
}

.footer-logo { margin-bottom: var(--space-4); }
.footer-logo .logo-img {
  height: 75px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
}
.footer-heading { color: var(--color-white); font-size: var(--font-size-lg); margin-bottom: var(--space-4); }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: var(--space-2); }
.footer-links a { color: var(--color-white); }
.footer-links a:hover { color: var(--color-white); }

.footer-bottom {
  border-top: 1px solid var(--color-neutral-700);
  padding-top: var(--space-6);
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-white);
}

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

.site-footer address { font-style: normal; color: var(--color-white); }
.site-footer address a { color: var(--color-white); }
.site-footer address a:hover { color: var(--color-white); }

.text-center { text-align: center; }
.mt-4 { margin-top: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }
.ml-2 { margin-left: var(--space-2); }

.hidden { display: none !important; }
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 768px) {
  .site-header .container { flex-direction: column; align-items: flex-start; }
  .menu-toggle { display: block; position: absolute; top: var(--space-4); right: var(--space-6); }
  .main-nav { width: 100%; display: none; margin-top: var(--space-4); }
  .main-nav.active { display: block; }
  .main-nav ul { flex-direction: column; gap: var(--space-2); }
  .hero-title { font-size: var(--font-size-3xl); }
  .card-grid { grid-template-columns: 1fr; }
  .cookie-content { flex-direction: column; align-items: flex-start; }
  .cookie-actions { width: 100%; justify-content: flex-start; }
  .accessibility-controls { top: auto; bottom: 100px; right: var(--space-4); }
}

@media print {
  .site-header, .cookie-banner, .accessibility-controls, .site-footer { display: none; }
  body { font-size: 12pt; }
  a { color: #000; text-decoration: underline; }
}
  .accessibility-controls { top: auto; bottom: 100px; right: var(--space-4); }
.site-footer > .container > .footer-content > div:first-child p { color: var(--color-white); }