/* style.css */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Noto+Sans+Thai:wght@400;500;600;700&display=swap');

:root {
    /* Color Palette */
    --bg-primary: #0a0a1a;
    --bg-secondary: #12122a;
    --bg-card: rgba(26, 26, 58, 0.7);
    --bg-glass: rgba(18, 18, 42, 0.6);
    
    --accent-purple: #8b5cf6;
    --accent-purple-light: #a78bfa;
    --accent-gold: #f59e0b;
    --accent-gold-hover: #fbbf24;
    --accent-red: #ef4444;
    
    --text-primary: #ffffff;
    --text-secondary: #a0a0c0;
    --text-muted: #6b7280;
    
    --border-subtle: rgba(139, 92, 246, 0.2);
    --border-glow: 0 0 15px rgba(139, 92, 246, 0.4);
    --border-glow-gold: 0 0 15px rgba(245, 158, 11, 0.4);
    
    --gradient-primary: linear-gradient(135deg, #8b5cf6, #d946ef);
    --gradient-gold: linear-gradient(135deg, #f59e0b, #fbbf24);
    
    /* Spacing */
    --container-max-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    
    /* Layout */
    --header-height: 80px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    
    /* Transition */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Noto Sans Thai', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 85% 30%, rgba(245, 158, 11, 0.05) 0%, transparent 50%);
    background-attachment: fixed;
}

a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    background: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-gold {
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }

/* Layout Utilities */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

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

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.grid { display: grid; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Responsive Grid Adjustments */
@media (max-width: 1024px) {
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
    .md\:flex-col { flex-direction: column; }
    .section { padding: var(--spacing-md) 0; }
}

@media (max-width: 640px) {
    .sm\:grid-cols-1 { grid-template-columns: 1fr; }
    .sm\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
}