/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
  background: #2563eb;
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: #1e3a8a;
}

/* Smooth Transitions */
a, button, input, textarea {
  transition: all 0.3s ease;
}

/* Focus States for Accessibility */
*:focus-visible {
  outline: 2px solid #2563eb;
  outline-offset: 2px;
}

/* Card Hover Effects */
.hover\:shadow-xl {
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.hover\:shadow-xl:hover {
  transform: translateY(-4px);
}

/* Button Styles */
button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Form Elements */
input, textarea {
  font-family: inherit;
}

input::placeholder,
textarea::placeholder {
  color: #94a3b8;
}

/* Animation Helpers */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fadeIn {
  animation: fadeIn 0.6s ease-out;
}

/* Loading Spinner */
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.animate-spin {
  animation: spin 1s linear infinite;
}

/* Gradient Text */
.gradient-text {
  background: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Card Borders */
.border-gradient {
  border: 2px solid transparent;
  background: linear-gradient(white, white) padding-box,
              linear-gradient(135deg, #2563eb, #3b82f6) border-box;
}

/* Mobile Menu Animation */
#mobile-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

#mobile-menu.show {
  max-height: 500px;
}

/* Scroll to Top Button */
#scroll-top {
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
}

#scroll-top.show {
  opacity: 1 !important;
  pointer-events: auto;
}

#scroll-top:hover {
  transform: translateY(-2px);
}

/* Partner Card Hover */
a[href*="sbsiusainc.com"]:hover,
a[href*="log-now.com"]:hover,
a[href*="kallisto.ch"]:hover,
a[href*="udao.org"]:hover {
  transform: translateY(-4px);
}

/* Form Success/Error Messages */
.form-success {
  background-color: #dcfce7;
  border: 1px solid #86efac;
  color: #166534;
}

.form-error {
  background-color: #fee2e2;
  border: 1px solid #fca5a5;
  color: #991b1b;
}

/* Hero Section Pattern */
.hero-pattern {
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

/* Responsive Typography */
@media (max-width: 768px) {
  h1 {
    font-size: 1.75rem;
  }
  h2 {
    font-size: 1.5rem;
  }
  h3 {
    font-size: 1.25rem;
  }
}

/* Print Styles */
@media print {
  nav, footer, button {
    display: none;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  * {
    border-color: currentColor !important;
  }
}

/* Dark Mode Support (optional) */
@media (prefers-color-scheme: dark) {
  /* Add dark mode styles if needed */
}