:root {
  /* Naming: Cryptographic Brutalism */
  --color-ink-black: #050505;
  --color-archive-white: #f4f4f0;
  --color-signet-red: #d32f2f;
  --color-state-gray: #2d3748;
  --color-gold-leaf: #c5a059;
  --color-phosphor-green: #00ff41;

  --font-display: 'DM Mono', monospace;
  --font-body: 'Chivo', sans-serif;
  --font-tech: 'DM Mono', monospace;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 2rem;
  --space-5: 4rem;
  --space-6: 8rem;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3rem;
  --text-6xl: 4rem;

  --line-height-tight: 1.1;
  --line-height-base: 1.5;
  --line-height-relaxed: 1.75;
}

@font-face {
  font-family: 'DM Mono';
  src: url('/assets/fonts/dm-mono-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'DM Mono';
  src: url('/assets/fonts/dm-mono-500.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Chivo';
  src: url('/assets/fonts/chivo-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Chivo';
  src: url('/assets/fonts/chivo-700.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background-color: var(--color-archive-white);
  color: var(--color-ink-black);
  line-height: var(--line-height-base);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 500;
  margin: 0 0 var(--space-3);
  line-height: var(--line-height-tight);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

a {
  color: var(--color-signet-red);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

header {
  border-bottom: 2px solid var(--color-ink-black);
  padding: var(--space-3) 0;
  background-color: var(--color-archive-white);
  position: sticky;
  top: 0;
  z-index: 100;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-2xl);
  color: var(--color-ink-black);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: -0.05em;
}
.logo:hover { text-decoration: none; }

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: var(--space-4);
}

nav a {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-ink-black);
  text-transform: uppercase;
}
nav a[aria-current="page"] {
  font-weight: 700;
  text-decoration: underline;
}

footer {
  border-top: 2px solid var(--color-ink-black);
  padding: var(--space-5) 0;
  margin-top: var(--space-6);
  font-family: var(--font-display);
  font-size: var(--text-sm);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
}

/* Base tool styles */
.tool-container {
  background: var(--color-ink-black);
  color: var(--color-archive-white);
  padding: var(--space-4);
  margin: var(--space-4) 0;
}
.tool-container h3, .tool-container label {
  font-family: var(--font-display);
}
.tool-container input, .tool-container select, .tool-container button {
  font-family: var(--font-tech);
  font-size: var(--text-base);
  padding: var(--space-2);
  margin-top: var(--space-1);
  border: none;
  border-radius: 0;
}
.tool-container input[type="text"], .tool-container input[type="number"], .tool-container input[type="password"] {
  width: 100%;
  box-sizing: border-box;
  margin-bottom: var(--space-3);
  color: var(--color-ink-black);
}
.tool-container button {
  background: var(--color-phosphor-green);
  color: var(--color-ink-black);
  cursor: pointer;
  font-weight: bold;
  text-transform: uppercase;
}
.tool-container button:hover {
  background: var(--color-archive-white);
}

/* Utilities */
.text-center { text-align: center; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mt-4 { margin-top: var(--space-4); }
.grid { display: grid; }
.gap-4 { gap: var(--space-4); }
.p-4 { padding: var(--space-4); }
.border-b { border-bottom: 2px solid var(--color-ink-black); }
.brutalist-card {
  border: 2px solid var(--color-ink-black);
  padding: var(--space-4);
  background: var(--color-archive-white);
  box-shadow: 4px 4px 0 var(--color-ink-black);
}

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr 1fr; }
}