/*
  Mono Space CSS Framework (self-hosted build)
  Customised for a high contrast greyscale palette.
*/

:root {
  color-scheme: dark;
  --mono-font-base: "IBM Plex Mono", "Fira Mono", "SFMono-Regular", "Menlo", "Monaco", "Consolas", "Liberation Mono", "Courier New", monospace;
  --mono-font-sans: "Inter", "Helvetica Neue", Arial, sans-serif;
  --mono-bg: #111111;
  --mono-surface: #1c1c1c;
  --mono-surface-alt: #262626;
  --mono-border: #3a3a3a;
  --mono-border-strong: #5c5c5c;
  --mono-text: #f5f5f5;
  --mono-muted: #b5b5b5;
  --mono-inverted: #0b0b0b;
  --mono-accent: #ffffff;
  --mono-accent-muted: #d9d9d9;
  --mono-radius: 0.4rem;
  --mono-spacing: clamp(0.9rem, 1vw + 0.5rem, 1.2rem);
  --mono-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at 20% 20%, rgba(90, 90, 90, 0.08), transparent 55%),
    radial-gradient(circle at 80% 10%, rgba(255, 255, 255, 0.08), transparent 45%),
    var(--mono-bg);
  color: var(--mono-text);
  font-family: var(--mono-font-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 72rem;
  margin: 0 auto;
  padding: calc(var(--mono-spacing) * 1.5) clamp(1.25rem, 3vw, 2.25rem);
}

a {
  color: var(--mono-accent);
  text-decoration-color: rgba(255, 255, 255, 0.5);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.25em;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

a:hover,
a:focus {
  color: var(--mono-inverted);
  text-decoration-color: var(--mono-accent);
  background: var(--mono-accent);
  outline: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: calc(var(--mono-spacing) * 1.2) 0 calc(var(--mono-spacing) * 0.6);
  font-family: var(--mono-font-sans);
  line-height: 1.25;
  text-transform: none;
  letter-spacing: 0.04em;
}

h1 {
  font-size: clamp(2.2rem, 3vw + 1.4rem, 3.1rem);
}

h2 {
  font-size: clamp(1.85rem, 2vw + 1.15rem, 2.5rem);
}

h3 {
  font-size: clamp(1.6rem, 2vw + 0.9rem, 2.1rem);
}

h4 {
  font-size: clamp(1.35rem, 1.2vw + 0.9rem, 1.65rem);
}

p,
ul,
ol,
pre,
blockquote {
  margin: 0 0 var(--mono-spacing);
}

blockquote {
  border-left: 0.25rem solid var(--mono-border-strong);
  padding: 0.1rem 1rem;
  color: var(--mono-muted);
  font-style: italic;
}

code,
pre,
kbd,
samp {
  font-family: var(--mono-font-base);
  background: var(--mono-surface-alt);
  color: var(--mono-accent);
  border-radius: var(--mono-radius);
}

code,
kbd,
samp {
  padding: 0.1rem 0.3rem;
  font-size: 0.95em;
}

pre {
  overflow: auto;
  padding: clamp(1rem, 0.75rem + 1vw, 1.4rem);
  box-shadow: inset 0 0 0 1px var(--mono-border);
}

hr {
  border: 0;
  border-top: 1px solid var(--mono-border);
  margin: calc(var(--mono-spacing) * 1.4) 0;
}

img,
video,
iframe {
  max-width: 100%;
  border-radius: var(--mono-radius);
  box-shadow: var(--mono-shadow);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: calc(var(--mono-spacing) * 1.5);
  background: var(--mono-surface);
  box-shadow: var(--mono-shadow);
  border-radius: var(--mono-radius);
  overflow: hidden;
}

thead {
  background: var(--mono-surface-alt);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
}

td,
th {
  padding: clamp(0.75rem, 0.5rem + 0.7vw, 1rem);
  border-bottom: 1px solid var(--mono-border);
  text-align: left;
}

tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.03);
}

tbody tr:hover {
  background: rgba(255, 255, 255, 0.08);
}

ul,
ol {
  padding-left: clamp(1.5rem, 1.2rem + 1vw, 2.2rem);
}

li + li {
  margin-top: 0.3rem;
}

button,
input,
select,
textarea {
  font-family: var(--mono-font-base);
  font-size: 1rem;
  color: var(--mono-text);
  background: var(--mono-surface-alt);
  border: 1px solid var(--mono-border-strong);
  padding: 0.65rem 0.9rem;
  border-radius: var(--mono-radius);
  transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

button:focus,
input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--mono-accent);
  outline-offset: 2px;
  background: var(--mono-surface);
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.15);
}

button,
input[type="submit"],
input[type="button"],
input[type="reset"] {
  cursor: pointer;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.02));
  color: var(--mono-text);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

button:hover,
input[type="submit"]:hover,
input[type="button"]:hover,
input[type="reset"]:hover {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.08));
}

label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.92rem;
  color: var(--mono-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

fieldset {
  border: 1px solid var(--mono-border);
  border-radius: var(--mono-radius);
  padding: 1rem 1.5rem 1.5rem;
  margin: 0 0 calc(var(--mono-spacing) * 1.5);
}

legend {
  padding: 0 0.5rem;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--mono-muted);
}

details {
  background: var(--mono-surface);
  border-radius: var(--mono-radius);
  padding: 1rem 1.2rem;
  margin-bottom: var(--mono-spacing);
  border: 1px solid var(--mono-border);
}

details[open] {
  box-shadow: var(--mono-shadow);
}

summary {
  cursor: pointer;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

footer,
header {
  padding: var(--mono-spacing) 0;
  color: var(--mono-muted);
}

header {
  border-bottom: 1px solid var(--mono-border);
  margin-bottom: calc(var(--mono-spacing) * 1.5);
}

footer {
  border-top: 1px solid var(--mono-border);
  margin-top: calc(var(--mono-spacing) * 1.5);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 0.75rem;
  padding: 0;
  margin: 0;
}

nav a {
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--mono-text);
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
}

nav a:hover,
nav a:focus {
  background: rgba(255, 255, 255, 0.15);
  color: var(--mono-inverted);
}

.alert {
  padding: 1rem 1.25rem;
  border-radius: var(--mono-radius);
  border: 1px solid var(--mono-border-strong);
  background: var(--mono-surface-alt);
  color: var(--mono-text);
}

.alert.info {
  border-color: #7a7a7a;
}

.alert.success {
  border-color: #8f8f8f;
}

.alert.warning {
  border-color: #b5b5b5;
}

.alert.danger {
  border-color: #d9d9d9;
}

::-moz-selection {
  background: var(--mono-accent);
  color: var(--mono-inverted);
}

::selection {
  background: var(--mono-accent);
  color: var(--mono-inverted);
}

@media (max-width: 720px) {
  body {
    font-size: 0.95rem;
  }

  .container {
    padding: calc(var(--mono-spacing)) clamp(1rem, 5vw, 1.5rem);
  }

  nav ul {
    flex-wrap: wrap;
  }
}