:root {
    --primary-color: #26A69A; /* Vibrant teal for a fresh look */
    --primary-dark: #00897B; /* Darker teal for gradients and hover */
    --accent-color: #FFCA28; /* Warm orange for buttons and highlights */
    --text-color: #1A202C; /* Darker text for readability */
    --secondary-bg: #E6F7FA; /* Light teal background for cards and sections */
  }

  body {
    font-family: 'Tajawal', sans-serif;
    color: var(--text-color);
    background: linear-gradient(180deg, var(--secondary-bg), #F3F4F6);
    direction: rtl;
    line-height: 1.6;
    font-size: 1.1rem; /* Slightly larger for readability */
  }

  a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
  }

  /* Header */
  header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  }

  .nav-link {
    position: relative;
    font-weight: 600;
    color: var(--text-color);
    transition: color 0.3s ease;
  }

  .nav-link:hover {
    color: var(--primary-dark);
  }

  .nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    right: 0;
    background: var(--primary-color);
    transition: width 0.3s ease;
  }

  .nav-link:hover::after {
    width: 100%;
  }

  .language-toggle button {
    font-weight: 600;
    cursor: pointer;
    padding: 0.5rem 1rem;
    background: none;
    border: none;
    border-radius: 0.25rem;
    transition: all 0.3s ease;
  }

  .language-toggle button:hover {
    background: var(--secondary-bg);
    color: var(--primary-dark);
  }

  .language-toggle button.active {
    color: var(--primary-color);
    font-weight: bold;
    background: var(--secondary-bg);
  }

  /* Buttons */
  .btn-primary {
    background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  }

  .btn-primary:hover {
    background: linear-gradient(90deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-3px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  }

  .btn-secondary {
    background: var(--accent-color);
    color: var(--text-color);
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  }

  .btn-secondary:hover {
    background: #FFB300;
    transform: translateY(-3px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  }

  /* Hero */
  .hero {
    background: url('/assets/images/donateus.jpeg') center/cover no-repeat fixed;
    position: relative;
    min-height: 70vh;
    display: flex;
    align-items: center;
    overflow: hidden;
  }

  .hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.65));
  }

  .hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    animation: slide-up 1s ease-out;
  }

  .hero-content h1 {
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    font-size: 2.5rem; /* Adjusted for balance */
  }

  .hero-content p {
    font-size: 1.25rem;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
  }

  @keyframes slide-up {
    from {
      opacity: 0;
      transform: translateY(30px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  /* Cards */
  .donation-card {
    background: white;
    border-radius: 0.75rem;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    overflow: hidden;
  }

  .donation-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
  }

  .donation-card i {
    transition: transform 0.3s ease;
  }

  .donation-card:hover i {
    transform: scale(1.2);
  }

  .donation-details {
    background: var(--secondary-bg);
    border-radius: 0 0 0.75rem 0.75rem;
    padding: 1.5rem;
    display: none;
    transition: all 0.3s ease;
  }

  /* Animations */
  .fade-in {
    opacity: 0;
    transform: translateY(25px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
  }

  .fade-in.visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* Form Validation */
  input:invalid:focus,
  textarea:invalid:focus {
    border-color: #EF4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
  }

  input:focus,
  textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(38, 166, 154, 0.2);
  }

  /* Footer */
  .footer {
    background: linear-gradient(180deg, var(--primary-dark), var(--primary-color));
    color: white;
    padding: 3rem 0;
  }

  .footer a {
    transition: color 0.3s ease;
  }

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

  .footer img {
    filter: brightness(0) invert(1); /* White logo for contrast */
    transition: transform 0.3s ease;
  }

  .footer img:hover {
    transform: scale(1.1);
  }