@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&family=JetBrains+Mono:wght@400&display=swap');
@import url('https://api.fontshare.com/v2/css?f[]=general-sans@600,700&display=swap');

:root {
  /* Genesis Color System */
  --color-primary: #6366F1;
  --color-primary-hover: #4F46E5;
  --color-secondary: #20970B;
  --color-neutral: #9C9C9C;
  --color-bg: #FAFAFA;
  --color-surface: #FFFFFF;
  --color-text-primary: #0A0A0A;
  --color-text-secondary: #6B6B6B;
  --color-border: #E8E8EC;
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;

  /* Typography */
  --font-display: 'General Sans', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-code: 'JetBrains Mono', monospace;

  /* Spacing (Base unit: 4px) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-full: 9999px;

  /* Elevation */
  --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 4px 12px rgba(99, 102, 241, 0.35);
  --ring-focus: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

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

body {
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Typography Classes */
h1, h2, h3, h4, h5, h6, .display-font {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-text-primary);
  line-height: 1.2;
}

.text-display { font-size: 72px; letter-spacing: -0.04em; }
.text-headline { font-size: 60px; }
.text-section { font-size: 32px; }
.text-subhead { font-size: 24px; }
.text-body { font-size: 15px; }
.text-small { font-size: 13px; }
.text-caption { font-size: 12px; color: var(--color-text-secondary); }
.text-overline { font-size: 11px; text-transform: uppercase; font-weight: 600; letter-spacing: 0.05em; color: var(--color-text-secondary); }

/* Utilities */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.text-center { text-align: center; }
.text-secondary { color: var(--color-text-secondary); }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  height: 56px;
  background: rgba(250, 250, 250, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--color-text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: var(--space-6);
}

.nav-links a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--color-text-primary);
  background: rgba(0,0,0,0.04);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 500;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  outline: none;
}

.btn:focus-visible { box-shadow: var(--ring-focus); }

/* Sizes */
.btn-sm { padding: 0 var(--space-3); height: 32px; font-size: 13px; }
.btn-md { padding: 0 var(--space-4); height: 38px; font-size: 14px; }
.btn-lg { padding: 0 var(--space-6); height: 44px; font-size: 15px; }

/* Variants */
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border: 1px solid var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover {
  background: var(--color-surface);
  border-color: #d1d1d6;
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid transparent;
}
.btn-ghost:hover { color: var(--color-text-primary); }

/* Inputs */
.input {
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--color-text-primary);
  outline: none;
  transition: all 0.2s ease;
}
.input::placeholder { color: var(--color-neutral); }
.input:focus {
  border-color: var(--color-primary);
  box-shadow: var(--ring-focus);
}

/* Cards */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all 0.2s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.card-padding { padding: var(--space-6); }

/* Code */
.code-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  font-family: var(--font-code);
  font-size: 13px;
  overflow: hidden;
}
.code-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-4);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--color-text-secondary);
}
.code-content {
  padding: var(--space-4);
  color: var(--color-text-primary);
  overflow-x: auto;
  white-space: pre;
}

/* Grid Layouts */
.grid { display: grid; gap: var(--space-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Main Section Spacing */
main {
  padding: var(--space-16) 0;
  min-height: calc(100vh - 120px);
}

.page-header {
  max-width: 700px;
  margin-bottom: var(--space-16);
}

/* Footer */
footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-8) 0;
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 13px;
}

/* Responsive Overrides */
@media (max-width: 768px) {
  .text-display { font-size: 48px; }
  .text-headline { font-size: 40px; }
  .text-section { font-size: 28px; }
  main { padding: var(--space-8) 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .nav-links { display: none; } /* Simplified mobile nav */
}