:root {
  --primary-color: #FF6B35;
  --secondary-color: #004E64;
  --accent-color: #F77F00;
  --text-dark: #1A1A1A;
  --text-light: #FFFFFF;
  --bg-light: #FFFFFF;
  --bg-section: #F8F9FA;
  --bg-dark: #004E64;
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 8px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.15);
  --border-radius: 12px;
  --max-width: 1200px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--text-dark);
  background-color: var(--bg-light);
  line-height: 1.6;
  overflow-x: hidden;
  width: 100%;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary-color);
  color: var(--text-light);
  padding: 8px;
  text-decoration: none;
  z-index: 100;
  border-radius: 0 0 4px 0;
}

.skip-link:focus {
  top: 0;
}

header.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  z-index: 1000;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

header.scrolled {
  box-shadow: var(--shadow-md);
}

nav.main-nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--secondary-color);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 0.5rem;
  align-items: center;
}

.nav-link {
  color: var(--text-dark);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  transition: var(--transition);
  position: relative;
  font-size: 0.95rem;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--primary-color);
  background-color: rgba(255, 107, 53, 0.1);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 3px;
  background: var(--primary-color);
  border-radius: 2px;
}

.donate-btn {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: var(--text-light);
  padding: 0.6rem 1.2rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
  font-size: 0.9rem;
}

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

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background: var(--text-dark);
  margin: 5px 0;
  transition: var(--transition);
  border-radius: 2px;
}

main {
  margin-top: 70px;
}

.hero {
  min-height: calc(100vh - 70px);
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.05) 0%, rgba(0, 78, 100, 0.05) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 60%;
  height: 150%;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.1) 0%, transparent 70%);
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(10deg); }
}

.hero-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-text h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-text .subtitle {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
}

.hero-text p {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-lg);
  color: #666;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.btn-primary, .btn-secondary {
  padding: 1rem 2.5rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: var(--shadow-sm);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: var(--text-light);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: white;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-3px);
}

.hero-image {
  position: relative;
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
}

.stats-bar {
  background: white;
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  text-align: center;
  margin-top: var(--spacing-lg);
}

.stat-item h3 {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
  font-weight: 700;
}

.stat-item p {
  color: #666;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

section {
  padding: var(--spacing-xl) 0;
}

section:nth-child(even) {
  background-color: var(--bg-section);
}

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

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-header h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--spacing-sm);
  color: var(--secondary-color);
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  border-radius: 2px;
}

.section-header p {
  font-size: 1.125rem;
  color: #666;
  max-width: 600px;
  margin: var(--spacing-md) auto 0;
}

.mission-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.mission-card {
  background: white;
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.mission-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.mission-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.mission-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.1), rgba(247, 127, 0, 0.1));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

.mission-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  color: var(--secondary-color);
}

.mission-card p {
  color: #666;
  line-height: 1.6;
}

.operation-content {
  background: white;
  border-radius: var(--border-radius);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
}

.operation-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.operation-header h3 {
  font-size: 2rem;
  color: var(--secondary-color);
}

.operation-tagline {
  font-style: italic;
  color: var(--primary-color);
  font-size: 1.125rem;
}

.info-section {
  margin-bottom: var(--spacing-lg);
}

.info-section h4 {
  color: var(--secondary-color);
  margin-bottom: var(--spacing-sm);
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.info-section h4::before {
  content: '▸';
  color: var(--primary-color);
  font-size: 1.5rem;
}

.partners-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.partners-list li {
  background: var(--bg-section);
  padding: var(--spacing-sm);
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.partners-list li::before {
  content: '✓';
  color: var(--primary-color);
  font-weight: bold;
}

.partners-list a {
  color: var(--primary-color);
  text-decoration: none;
}

.partners-list a:hover {
  text-decoration: underline;
}

.stats-table {
  background: var(--bg-section);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.stats-table h5 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--secondary-color);
}

.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: white;
}

th, td {
  padding: 1rem;
  text-align: left;
}

tbody tr {
  background: white;
  transition: var(--transition);
}

tbody tr:hover {
  background: rgba(255, 107, 53, 0.05);
}

tbody tr:nth-child(even) {
  background: var(--bg-section);
}

.contribute-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.contribute-card {
  background: white;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.contribute-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.contribute-card img {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.contribute-content {
  padding: var(--spacing-lg);
}

.contribute-content h4 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--secondary-color);
}

.contribute-content p {
  color: #666;
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.drive-section {
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.03), rgba(0, 78, 100, 0.03));
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-lg);
}

.drive-section h3 {
  font-size: 2rem;
  color: var(--secondary-color);
  margin-bottom: var(--spacing-md);
}

.drive-section p {
  font-size: 1.125rem;
  line-height: 1.8;
  color: #666;
  margin-bottom: var(--spacing-lg);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.team-member {
  background: white;
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
}

.team-member h5 {
  font-size: 1.5rem;
  color: var(--secondary-color);
  margin-bottom: 0.5rem;
}

.team-member .role {
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.contact-info {
  background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
  color: white;
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
}

.contact-info h4 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.contact-info p {
  margin-bottom: var(--spacing-sm);
  line-height: 1.8;
}

.contact-info a {
  color: white;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.contact-info a:hover {
  opacity: 0.8;
}

.contact-form {
  background: white;
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--secondary-color);
}

.form-group input,
.form-group textarea {
  padding: 0.75rem 1rem;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-family: var(--font-body);
  transition: var(--transition);
  font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

textarea {
  resize: vertical;
  min-height: 150px;
}

.form-actions {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.btn-submit, .btn-reset {
  padding: 0.75rem 2rem;
  border: none;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
}

.btn-submit {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: white;
}

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

.btn-reset {
  background: #e0e0e0;
  color: var(--text-dark);
}

.btn-reset:hover {
  background: #d0d0d0;
}

footer {
  background: var(--secondary-color);
  color: white;
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  text-align: center;
}

.footer-content p {
  margin-bottom: var(--spacing-sm);
  line-height: 1.8;
}

.footer-disclaimer {
  font-size: 0.9rem;
  opacity: 0.8;
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.scroll-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  opacity: 0;
  visibility: hidden;
}

.scroll-to-top.show {
  opacity: 1;
  visibility: visible;
}

.scroll-to-top:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

@media (max-width: 768px) {
  :root {
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
  }

  body {
    width: 100vw;
    max-width: 100vw;
  }

  .site-header {
    width: 100%;
  }

  nav.main-nav {
    padding: 0 1rem;
    width: 100%;
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: white;
    flex-direction: column;
    padding: var(--spacing-lg);
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    gap: 1rem;
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-link {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1.1rem;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .hero {
    width: 100%;
    padding: 0;
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    padding: var(--spacing-lg) 1rem;
    width: 100%;
  }

  .hero-image {
    order: -1;
    margin: 0 -1rem;
  }

  .hero-image img {
    border-radius: 0;
    width: 100vw;
    max-width: 100vw;
    margin-left: calc(-50vw + 50%);
    margin-right: calc(-50vw + 50%);
  }

  .stats-bar {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 0 1rem;
    width: 100%;
    max-width: 100%;
  }

  section {
    width: 100%;
    padding: var(--spacing-lg) 0;
  }

  .mission-grid,
  .contribute-grid,
  .team-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .operation-content,
  .drive-section,
  .contact-form {
    padding: var(--spacing-md);
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .operation-header {
    flex-direction: column;
    text-align: center;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .form-actions {
    flex-direction: column;
    width: 100%;
  }

  .form-actions > * {
    width: 100%;
    text-align: center;
  }

  .hero-text h1 {
    font-size: 2rem;
  }

  .section-header h2 {
    font-size: 1.75rem;
  }

  .table-wrapper {
    margin: 0 -1rem;
    padding: 0 1rem;
  }

  table {
    font-size: 0.9rem;
  }

  th, td {
    padding: 0.5rem;
  }
}