:root {
  --primary-gradient: linear-gradient(135deg, #8e2de2, #4a00e0);
  --accent-gradient: linear-gradient(135deg, #00c6ff, #0072ff);
  --bg-dark: #0f172a;
  --bg-card: rgba(30, 41, 59, 0.7);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --glass-border: rgba(255, 255, 255, 0.1);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: 'Kanit', sans-serif;
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(142, 45, 226, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(0, 198, 255, 0.1) 0%, transparent 40%);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 60px 20px;
}

header {
  text-align: center;
  margin-bottom: 60px;
  animation: fadeInDown 0.8s ease-out;
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

h1 {
  font-size: 3.5rem;
  font-weight: 600;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 15px;
  letter-spacing: -1px;
}

.badge {
  font-size: 0.9rem;
  padding: 4px 12px;
  border-radius: 99px;
  background: var(--accent-gradient);
  color: white;
  vertical-align: middle;
  margin-left: 10px;
  font-weight: 400;
  -webkit-text-fill-color: white;
}

header p {
  color: var(--text-secondary);
  font-size: 1.2rem;
}

nav {
  position: sticky;
  top: 20px;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(12px);
  padding: 12px 20px;
  border-radius: 99px;
  border: 1px solid var(--glass-border);
  margin-bottom: 50px;
  box-shadow: var(--shadow-lg);
}

nav ul {
  display: flex;
  justify-content: center;
  gap: 30px;
  list-style: none;
}

nav a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all 0.3s ease;
  font-size: 1rem;
}

nav a:hover {
  color: white;
  text-shadow: 0 0 10px rgba(255,255,255,0.3);
}

.card {
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  padding: 40px;
  border-radius: 24px;
  margin-bottom: 40px;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-lg);
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.4s;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.5);
  border-color: rgba(142, 45, 226, 0.3);
}

h2 {
  font-size: 1.8rem;
  margin-bottom: 25px;
  display: flex;
  align-items: center;
  gap: 15px;
}

.code-block {
  background: #000000;
  padding: 24px;
  border-radius: 12px;
  font-family: 'JetBrains Mono', monospace;
  position: relative;
  margin: 25px 0;
  border: 1px solid #1e293b;
}

pre {
  margin: 0;
  font-size: 0.95rem;
  color: #e2e8f0;
}

.copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.75rem;
  transition: all 0.2s;
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: white;
}

.structure {
  background: rgba(0, 0, 0, 0.2);
  padding: 20px;
  border-radius: 12px;
  border-left: 4px solid #8e2de2;
  margin: 20px 0;
}

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
}

.philosophy-grid .item {
  background: rgba(255, 255, 255, 0.03);
  padding: 25px;
  border-radius: 16px;
  border: 1px solid var(--glass-border);
  transition: all 0.3s;
}

.philosophy-grid .item:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(0, 198, 255, 0.3);
}

.philosophy-grid h3 {
  margin-bottom: 12px;
  color: #00c6ff;
}

footer {
  text-align: center;
  margin-top: 80px;
  padding-bottom: 40px;
  color: var(--text-secondary);
}

@media (max-width: 600px) {
  h1 { font-size: 2.5rem; }
  nav ul { gap: 15px; flex-wrap: wrap; }
  .container { padding: 40px 15px; }
  .card { padding: 25px; }
}