:root {
  --font-body: system-ui, sans-serif;
  --font-mono: ui-monospace, monospace;
  --font-size: 16px;

  --color-bg: #ffffff;
  --color-text: #111111;
  --color-muted: #666666;
  --color-border: #dddddd;
  --color-accent: #4db325;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;

  --max-width: 1280px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #111111;
    --color-text: #f1f1f1;
    --color-muted: #999999;
    --color-border: #333333;
    --color-accent: #4db325;
  }
}

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

html {
  font-size: var(--font-size);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  line-height: 1.25;
}

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--color-accent);
  text-decoration: none;
}
a:hover {
  color: color-mix(in srgb, var(--color-accent), var(--color-text) 20%);
  text-decoration: underline;
}

ul, ol {
  padding-left: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

li {
  margin-bottom: var(--spacing-xs);
}

blockquote {
  border-left: 4px solid var(--color-border);
  padding-left: var(--spacing-md);
  color: var(--color-muted);
  margin-bottom: var(--spacing-md);
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--spacing-md) 0;
}

strong {
  font-weight: bold;
}
em {
  font-style: italic;
}
small {
  font-size: 0.875em;
}

code {
  font-family: var(--font-mono);
  background: color-mix(in srgb, var(--color-bg), var(--color-text) 10%);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
}

pre {
  font-family: var(--font-mono);
  background: color-mix(in srgb, var(--color-bg), var(--color-text) 10%);
  padding: var(--spacing-md);
  border-radius: 6px;
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
  font-size: 0.9em;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-md);
}
th, td {
  border: 1px solid var(--color-border);
  padding: var(--spacing-sm);
  text-align: left;
}
tr:hover {
  background: color-mix(in srgb, var(--color-bg), var(--color-text) 5%);
}

input, button, textarea, select {
  font: inherit;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  width: 100%;
  max-width: 100%;
  border-radius: 4px;
  margin-bottom: var(--spacing-sm);
}

input[type="radio"],
input[type="checkbox"] {
  width: auto;
}

input:focus, textarea:focus, select:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

button {
  cursor: pointer;
  border: none;
  background: var(--color-border);
}

.btn {
  display: inline-block;
  padding: 0.25rem .5rem;
  font-weight: 500;
  text-align: center;
  text-decoration: none;
  border-radius: 4px;
  border: 1px solid transparent;
  background-color: var(--color-border);
  color: var(--color-text);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
  width: auto;
  max-width: 100%;
}

button:hover,
input[type="submit"]:hover,
input[type="button"]:hover,
.btn:hover {
  background: color-mix(in srgb, var(--color-border), var(--color-text) 20%);
  color: var(--color-text);
}

.btn,
a.btn,
button,
input[type="submit"],
input[type="button"] {
  appearance: none;
  -webkit-appearance: none;
  text-decoration: none;
  cursor: pointer;
  margin: 0;
}

.btn-primary {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}
.btn-primary:hover {
  background: color-mix(in srgb, var(--color-accent), black 15%);
}

.btn-block {
  display: block;
  width: 100%;
}

.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--spacing-md);
}

.row {
    display: flex;
    flex-direction: row;
}
.col {
    display: flex;
    flex-direction: column;
}

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }

.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); }

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }

.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }

.pt-sm { padding-top: var(--spacing-sm); }
.pb-sm { padding-bottom: var(--spacing-sm); }
.pl-sm { padding-left: var(--spacing-sm); }
.pr-sm { padding-right: var(--spacing-sm); }

.mr-sm { margin-right: var(--spacing-sm); }
.ml-sm { margin-left: var(--spacing-sm); }
.mt-sm { margin-top: var(--spacing-sm); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

@media (max-width: 768px) {
  .flex-row { flex-direction: column; }
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
}

/* Custom styles */
td > input {
  margin: 0;
}