:root {
  --primary-color: #0000FF;
  --secondary-color: #FF0000;
  --tertiary-color: #FFFF00;
  --background-color: #FFFF00;
  --card-background-color: #FFFFFF;
  --text-color: #000000;
  --secondary-text-color: #FFFFFF;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --header-color: #FFFFFF;
  --grid-color: rgba(98, 0, 238, 0.1);
  --grid-size: 2rem;
}

::selection {
  background-color: var(--secondary-color);
  color: var(--secondary-text-color);
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 12px;
}

::-webkit-scrollbar-track {
  background: var(--background-color);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--secondary-color);
}

body {
  font-family: 'Kanit', sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
  margin: 0;
  padding: 0;
  position: relative;
  overflow-x: auto;
  overflow-y: auto;
  scroll-behavior: smooth;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='32' height='32' viewBox='0 0 32 32'%3E%3Cpath d='M8 28L24 4 16 20H24L8 28Z' fill='white' stroke='%230000FF' stroke-width='2'/%3E%3C/svg%3E") 8 8, auto;
}

.background-grid {
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
  background-image: 
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: subtleMove 60s linear infinite;
}

.card .last-update {
  font-size: 0.8em;
  color: #666;
  margin-top: 0.5rem;
}

.card .description {
  font-size: 0.9em;
  margin-top: 0.5rem;
}

@keyframes subtleMove {
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: 50px 50px;
  }
}


.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--grid-size);
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 2rem;
}

header {
  background-color: var(--primary-color);
  color: var(--background-color);
  text-align: center;
  padding: 2rem 0;
  clip-path: polygon(0 0, 100% 0, 100% 85%, 0 100%);
}

h1 {
  font-family: 'Kanit', sans-serif;
  color: var(--header-color);
}

h2 {
  font-family: 'Kanit', sans-serif;
  color: var(--primary-color);
}

.card {
  background-color: var(--card-background-color);
  border-radius: 8px;
  box-shadow: 0 4px 6px var(--shadow-color);
  padding: 1.5rem;
  transition: transform 0.3s ease;
  position: relative;
  overflow: visible;
  transition: transform 0.3s ease;
  font-family: 'Kanit', sans-serif;
  margin-bottom: 2rem;
  border: 2px solid var(--primary-color);
}

.card::before {
  content: '';
  position: absolute;
  top: 5px;
  left: 5px;
  right: -5px;
  bottom: -5px;
  background: var(--primary-color);
  z-index: -1;
  transform: skew(2deg, 2deg);
  transition: transform 0.3s ease;
}

.card:hover::before {
  transform: skew(-2deg, -2deg);
  color: var(--secondary-text-color);
}

.card:hover {
  font-family: 'Kanit', sans-serif;
  transform: translateY(-5px) rotate(1deg);
  color: var(--secondary-text-color);
}

.card:last-child {
  margin-bottom: 0;
}

.card {
  transition: transform 0.3s ease;
}

.card:hover {
  transform: perspective(1000px) rotateY(10deg) rotateX(5deg) translateY(-5px);
}

.card a, .card p {
  color: var(--text-color);
  transition: color 0.3s ease;
}

.card:hover {
  background-color: var(--primary-color);
}

.card:hover a, .card:hover p {
  color: var(--secondary-text-color);
}

/* Golden Ratio Grid */
.golden-ratio-container {
  display: grid;
  gap: 1rem;
}

.btn {
  background-color: var(--secondary-color);
  color: var(--background-color);
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  text-decoration: none;
  transition: background-color 0.3s ease, transform 0.2s ease;
  margin: 0.5rem;
  font-weight: bold;
  font-family: 'Kanit', sans-serif;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='32' height='32' viewBox='0 0 32 32'%3E%3Cpath d='M8 28L24 4 16 20H24L8 28Z' fill='white' stroke='%230000FF' stroke-width='2'/%3E%3C/svg%3E") 8 8, auto;

}

.btn .material-icons {
  margin-right: 0.5rem;
}

.btn:hover, .btn:focus {
  background-color: var(--tertiary-color);
  color: var(--primary-color);
  transform: scale(1.05);
  font-family: 'Kanit', sans-serif;
}

footer {
  font-family: 'Kanit', sans-serif;
  background-color: var(--primary-color);
  color: var(--background-color);
  text-align: center;
  padding: 1rem 0;
  margin-top: 2rem;
  clip-path: polygon(0 15%, 100% 0, 100% 100%, 0 100%);
  width: 100%;
  margin-top: auto;
}

@media (max-width: 768px) {
  .container {
    padding: calc(var(--grid-size) / 2);
    grid-template-columns: 1fr;
  }
}