/* ==========================================================================
   DU LABS — Official Stylesheet (Inspired by ko-labs.dev)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&family=Space+Mono:wght@400;700&display=swap');

:root {
  --font-sans: 'Inter', sans-serif;
  --font-mono: 'Space Mono', monospace;
  
  --color-background: #0a0a0a;
  --color-surface: #111111;
  --color-accent: #00ffe7;
  
  --color-neutral-300: #d4d4d4;
  --color-neutral-400: #a1a1a1;
  --color-neutral-500: #737373;
  --color-neutral-600: #525252;
  --color-neutral-700: #404040;
  --color-neutral-800: #262626;
  --color-white: #ffffff;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border: 0 solid;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  color-scheme: dark;
}

body {
  color: #e5e5e5;
  background-color: var(--color-background);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: inherit;
}

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

/* Fonts */
.font-mono {
  font-family: var(--font-mono);
}

.font-sans {
  font-family: var(--font-sans);
}

.font-bold {
  font-weight: 700;
}

.font-semibold {
  font-weight: 600;
}

.font-normal {
  font-weight: 400;
}

/* Text Sizes */
.text-xs { font-size: 0.75rem; line-height: 1rem; }
.text-sm { font-size: 0.875rem; line-height: 1.25rem; }
.text-base { font-size: 1rem; line-height: 1.5rem; }
.text-lg { font-size: 1.125rem; line-height: 1.75rem; }
.text-xl { font-size: 1.25rem; line-height: 1.75rem; }
.text-3xl { font-size: 1.875rem; line-height: 2.25rem; }
.text-6xl { font-size: 3.75rem; line-height: 1; }
.text-8xl { font-size: 6rem; line-height: 1; }

.leading-relaxed { line-height: 1.625; }
.leading-tight { line-height: 1.25; }
.tracking-tight { letter-spacing: -0.025em; }
.tracking-widest { letter-spacing: 0.1em; }
.tracking-\[0\.3em\] { letter-spacing: 0.3em; }
.uppercase { text-transform: uppercase; }
.text-center { text-align: center; }

/* Colors */
.text-white { color: var(--color-white); }
.text-accent { color: var(--color-accent); }
.text-accent\/70 { color: rgba(0, 255, 231, 0.7); }
.text-accent\/80 { color: rgba(0, 255, 231, 0.8); }
.text-background { color: var(--color-background); }
.text-neutral-300 { color: var(--color-neutral-300); }
.text-neutral-400 { color: var(--color-neutral-400); }
.text-neutral-500 { color: var(--color-neutral-500); }
.text-neutral-700 { color: var(--color-neutral-700); }

/* Backgrounds */
.bg-surface { background-color: var(--color-surface); }
.bg-background\/80 { background-color: rgba(10, 10, 10, 0.8); }
.bg-accent { background-color: var(--color-accent); }
.bg-accent\/5 { background-color: rgba(0, 255, 231, 0.05); }
.bg-accent\/10 { background-color: rgba(0, 255, 231, 0.1); }
.bg-accent\/80 { background-color: rgba(0, 255, 231, 0.8); }
.bg-radial-fade {
  background-image: radial-gradient(ellipse at center, transparent 30%, #0a0a0a 80%);
}

/* Borders */
.border { border: 1px solid; }
.border-t { border-top: 1px solid; }
.border-b { border-bottom: 1px solid; }
.border-accent { border-color: var(--color-accent); }
.border-accent\/10 { border-color: rgba(0, 255, 231, 0.1); }
.border-accent\/20 { border-color: rgba(0, 255, 231, 0.2); }
.border-accent\/30 { border-color: rgba(0, 255, 231, 0.3); }
.border-accent\/40 { border-color: rgba(0, 255, 231, 0.4); }
.border-neutral-700 { border-color: var(--color-neutral-700); }
.border-neutral-800 { border-color: var(--color-neutral-800); }

.rounded { border-radius: 0.25rem; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-xl { border-radius: 0.75rem; }

/* Display & Layout */
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.grid { display: grid; }
.hidden { display: none; }

.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.shrink-0 { flex-shrink: 0; }

.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

/* Spacing & Sizes */
.w-full { width: 100%; }
.h-full { height: 100%; }
.w-6 { width: 1.5rem; }
.h-6 { height: 1.5rem; }
.w-12 { width: 3rem; }
.h-12 { height: 3rem; }
.w-24 { width: 6rem; }
.h-24 { height: 6rem; }
.h-14 { height: 3.5rem; }
.h-auto { height: auto; }
.min-h-screen { min-height: 100vh; }

.max-w-md { max-width: 28rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-3xl { max-width: 48rem; }
.max-w-5xl { max-width: 64rem; }
.mx-auto { margin-left: auto; margin-right: auto; }

.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }

.p-2 { padding: 0.5rem; }
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-5 { padding: 1.25rem; }
.p-6 { padding: 1.5rem; }

.px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
.px-3 { padding-left: 0.75rem; padding-right: 0.75rem; }
.px-5 { padding-left: 1.25rem; padding-right: 1.25rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }

.py-0\.5 { padding-top: 0.125rem; padding-bottom: 0.125rem; }
.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.py-24 { padding-top: 6rem; padding-bottom: 6rem; }

.pt-14 { padding-top: 3.5rem; }
.pt-28 { padding-top: 7rem; }

.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-12 { margin-bottom: 3rem; }
.mb-20 { margin-bottom: 5rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-10 { margin-top: 2.5rem; }
.mt-24 { margin-top: 6rem; }

.space-y-10 > :not(:last-child) {
  margin-bottom: 2.5rem;
}

/* Positioning */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.inset-0 { top: 0; right: 0; bottom: 0; left: 0; }
.top-0 { top: 0; }
.left-0 { left: 0; }
.right-0 { right: 0; }
.z-10 { z-index: 10; }
.z-50 { z-index: 50; }
.overflow-hidden { overflow: hidden; }
.opacity-10 { opacity: 0.1; }

/* Backdrop & Transitions */
.backdrop-blur-sm {
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.transition-all {
  transition-property: all;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

.transition-colors {
  transition-property: color, background-color, border-color;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

.duration-200 { transition-duration: 200ms; }
.duration-300 { transition-duration: 300ms; }

/* Hover Effects matching ko-labs.dev */
.hover\:border-accent:hover {
  border-color: var(--color-accent);
}

.hover\:border-accent\/60:hover {
  border-color: rgba(0, 255, 231, 0.6);
}

.hover\:bg-accent:hover {
  background-color: var(--color-accent);
}

.hover\:bg-accent\/5:hover {
  background-color: rgba(0, 255, 231, 0.05);
}

.hover\:text-accent:hover {
  color: var(--color-accent);
}

.hover\:text-background:hover {
  color: var(--color-background);
}

.hover\:underline:hover {
  text-decoration: underline;
}

.hover\:shadow-\[0_0_20px_rgba\(0\,255\,231\,0\.05\)\]:hover {
  box-shadow: 0 0 20px rgba(0, 255, 231, 0.05);
}

/* Media Queries */
@media (min-width: 640px) {
  .sm\:flex-row { flex-direction: row; }
  .sm\:items-center { align-items: center; }
}

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .md\:text-8xl { font-size: 6rem; line-height: 1; }
  .md\:text-xl { font-size: 1.25rem; line-height: 1.75rem; }
}