/* TKF Donor Hub - Professional Edition with ADA Compliance */

/* Import Google Fonts for better typography */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Crimson+Pro:wght@600;700&display=swap');

/* TKF Brand Colors */
:root {
  --tkf-green: #78be20;
  --tkf-green-dark: #5a9318;
  --tkf-green-light: #9dd94a;
  --tkf-dark: #212121;
  --tkf-medium: #616161;
  --tkf-light: #9e9e9e;
  --tkf-bg-light: #f5f6f7;
  --tkf-border: #dddedf;
  --tkf-white: #ffffff;
  --tkf-focus: #0066cc;
}

/* Base Typography - ADA Compliant */
.tkf-hub {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--tkf-dark);
  padding: 80px 20px;
  background: linear-gradient(180deg, #ffffff 0%, var(--tkf-bg-light) 100%);
}

.tkf-hub__inner {
  max-width: 1200px;
  margin: 0 auto;
}

/* Focus States - ADA Requirement */
*:focus-visible {
  outline: 3px solid var(--tkf-focus);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Hero Section */
.tkf-hero {
  text-align: center;
  padding: 60px 20px;
  margin-bottom: 60px;
  background: linear-gradient(135deg, rgba(120,190,32,0.05) 0%, rgba(120,190,32,0.02) 100%);
  border-radius: 24px;
  border: 2px solid rgba(120,190,32,0.1);
}

.tkf-hero__title {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  color: var(--tkf-dark);
  margin: 0 0 24px 0;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.tkf-hero__subtitle {
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  color: var(--tkf-medium);
  max-width: 700px;
  margin: 0 auto 48px auto;
  line-height: 1.6;
}

/* Stats Row */
.tkf-hero__stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.tkf-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.tkf-stat__number {
  font-size: clamp(2rem, 3vw, 3rem);
  font-weight: 800;
  color: var(--tkf-green);
  line-height: 1;
}

.tkf-stat__label {
  font-size: 0.875rem;
  color: var(--tkf-medium);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  text-align: center;
  max-width: 120px;
}

/* CTA Buttons */
.tkf-hero__cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.tkf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 32px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 12px;
  transition: all 0.3s ease;
  cursor: pointer;
  border: 2px solid transparent;
  min-height: 48px; /* ADA touch target */
}

.tkf-btn--primary {
  background: linear-gradient(135deg, var(--tkf-green) 0%, var(--tkf-green-dark) 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(120,190,32,0.3);
}

.tkf-btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(120,190,32,0.4);
}

.tkf-btn--secondary {
  background: white;
  color: var(--tkf-green);
  border-color: var(--tkf-green);
}

.tkf-btn--secondary:hover {
  background: var(--tkf-green);
  color: white;
}

.tkf-btn--large {
  padding: 20px 48px;
  font-size: 1.125rem;
}

/* Intro Section */
.tkf-intro {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 60px auto;
}

.tkf-intro__title {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--tkf-dark);
  margin: 0 0 16px 0;
}

.tkf-intro__text {
  font-size: 1.125rem;
  color: var(--tkf-medium);
  line-height: 1.7;
  margin: 0;
}

/* Tier Grid */
.tkf-tiers {
  display: grid;
  gap: 32px;
  grid-template-columns: 1fr;
  margin-bottom: 80px;
}

/* Individual Tier Card */
.tkf-tier {
  background: white;
  border-radius: 24px;
  padding: 40px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border: 2px solid rgba(120,190,32,0.1);
  position: relative;
  overflow: hidden;
}

/* SVG Icon Placeholder */
.tkf-tier::after {
  content: '';
  position: absolute;
  top: 40px;
  right: 40px;
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, rgba(120,190,32,0.1) 0%, rgba(120,190,32,0.05) 100%);
  border-radius: 50%;
  opacity: 0.5;
}

.tkf-tier::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  background: linear-gradient(90deg, var(--tkf-green) 0%, var(--tkf-green-light) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.tkf-tier:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(120,190,32,0.15);
  border-color: var(--tkf-green);
}

.tkf-tier:hover::before {
  opacity: 1;
}

/* Tier Header */
.tkf-tier__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 2px solid var(--tkf-border);
}

.tkf-tier__amount {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--tkf-green-dark) 0%, var(--tkf-green) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.tkf-tier__title {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  font-weight: 700;
  color: var(--tkf-dark);
  flex: 1;
  text-align: right;
  line-height: 1.2;
}

/* Tier Description */
.tkf-tier__desc {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--tkf-medium);
  margin: 0 0 20px 0;
}

/* Impact Badge */
.tkf-tier__impact {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(120,190,32,0.1);
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--tkf-green-dark);
  margin-bottom: 24px;
}

.tkf-tier__impact::before {
  content: '✓';
  display: inline-block;
  font-weight: bold;
  font-size: 1rem;
}

/* Donor Section */
.tkf-donor-section__title {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--tkf-medium);
  margin: 24px 0 16px 0;
}

/* Donor Grid */
.tkf-donorgrid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.tkf-donorcard {
  background: linear-gradient(135deg, #ffffff 0%, var(--tkf-bg-light) 100%);
  border: 2px solid var(--tkf-border);
  border-radius: 16px;
  padding: 20px 16px;
  text-align: center;
  font-weight: 600;
  font-size: 1rem;
  color: var(--tkf-dark);
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tkf-donorcard::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--tkf-green) 0%, var(--tkf-green-light) 100%);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.tkf-donorcard:hover {
  border-color: var(--tkf-green);
  transform: scale(1.03);
  box-shadow: 0 4px 16px rgba(120,190,32,0.15);
}

.tkf-donorcard:hover::before {
  transform: scaleX(1);
}

/* Empty State */
.tkf-empty {
  padding: 32px 24px;
  text-align: center;
  background: rgba(120,190,32,0.05);
  border: 2px dashed rgba(120,190,32,0.2);
  border-radius: 12px;
  color: var(--tkf-medium);
  font-style: italic;
  font-size: 0.9375rem;
}

/* Footer CTA */
.tkf-footer-cta {
  text-align: center;
  padding: 60px 40px;
  background: linear-gradient(135deg, var(--tkf-green) 0%, var(--tkf-green-dark) 100%);
  border-radius: 24px;
  color: white;
  margin-top: 60px;
}

.tkf-footer-cta__title {
  font-family: 'Crimson Pro', Georgia, serif;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  margin: 0 0 16px 0;
  color: white;
}

.tkf-footer-cta__text {
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto 32px auto;
  opacity: 0.95;
  line-height: 1.6;
}

.tkf-footer-cta .tkf-btn {
  background: white;
  color: var(--tkf-green);
  font-weight: 700;
}

.tkf-footer-cta .tkf-btn:hover {
  background: var(--tkf-bg-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

/* Loading Skeleton */
.tkf-skeleton {
  padding: 60px 20px;
  text-align: center;
  color: var(--tkf-medium);
  font-size: 1rem;
}

/* Responsive - Tablet */
@media (min-width: 768px) {
  .tkf-tiers {
    grid-template-columns: repeat(2, 1fr);
  }
  
  /* Featured tier spans full width */
  .tkf-tier:first-child {
    grid-column: 1 / -1;
  }
}

/* Responsive - Desktop */
@media (min-width: 1024px) {
  .tkf-donorgrid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }
}

/* Responsive - Mobile */
@media (max-width: 767px) {
  .tkf-hub {
    padding: 40px 16px;
  }
  
  .tkf-hero {
    padding: 40px 20px;
  }
  
  .tkf-hero__stats {
    gap: 32px;
  }
  
  .tkf-tier {
    padding: 32px 24px;
  }
  
  .tkf-tier__head {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  
  .tkf-tier__title {
    text-align: left;
  }
  
  .tkf-hero__cta {
    flex-direction: column;
  }
  
  .tkf-btn {
    width: 100%;
  }
  
  .tkf-donorgrid {
    grid-template-columns: 1fr;
  }
}

/* Reduced Motion - ADA Requirement */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Print Styles */
@media print {
  .tkf-tier {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid var(--tkf-border);
  }
  
  .tkf-btn {
    display: none;
  }
}

/* High Contrast Mode - ADA Support */
@media (prefers-contrast: high) {
  .tkf-tier {
    border-width: 3px;
  }
  
  .tkf-btn {
    border-width: 3px;
  }
}