:root {
  --steel: #e4e8e6;
  --plate: #f3f5f3;
  --ink: #16273b;
  --muted: #455668;
  --valve: #f4b400;
  --gauge: #1f6b4a;
  --rust: #9f3a22;
  --sans: 'Archivo Variable', system-ui, sans-serif;
  --serif: 'Source Serif 4 Variable', Georgia, serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--ink);
  background: var(--steel);
}

::selection { background: var(--valve); color: var(--ink); }

:focus-visible { outline: 3px solid var(--valve); outline-offset: 2px; box-shadow: 0 0 0 5px var(--ink); }

.page { padding: 1rem 1.25rem 4rem; max-width: 64rem; margin: 0 auto; }

nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 3px solid var(--ink);
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1rem;
}
nav a { color: var(--ink); text-decoration: none; padding: 0.25rem 0; border-bottom: 2px solid transparent; }
nav a:hover { border-bottom-color: var(--ink); }
nav a.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-right: auto;
  font-size: 1.75rem;
  font-weight: 800;
  font-stretch: 125%;
  letter-spacing: -0.01em;
  border-bottom: 0;
}
nav a.brand img { display: block; animation: turn-valve 1.1s cubic-bezier(0.65, 0, 0.2, 1) both; }

@keyframes turn-valve { from { transform: rotate(-270deg); } to { transform: rotate(0); } }
@media (prefers-reduced-motion: reduce) { nav a.brand img { animation: none; } }

article, .admin { margin-top: clamp(2rem, 6vw, 4.5rem); }
article > *, .admin { max-width: 40rem; }
.admin:has(.editor) { max-width: none; }
article > h1, .admin > h1 { max-width: 16ch; }

h1, h2, h3 { font-family: var(--sans); font-stretch: 125%; line-height: 1.05; letter-spacing: -0.015em; }
h1 { font-size: clamp(2.5rem, 8vw, 5.25rem); font-weight: 800; margin: 0 0 0.5em; text-wrap: balance; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); font-weight: 750; margin: 2em 0 0.5em; }
h3 { font-size: 1.25rem; font-weight: 700; margin: 1.75em 0 0.5em; }

article > h1 + p { font-size: 1.5rem; line-height: 1.5; }
p { margin: 0 0 1.1em; }

a { color: var(--ink); text-decoration-color: var(--valve); text-decoration-thickness: 0.2em; text-underline-offset: 0.12em; }
a:hover { background: var(--valve); text-decoration-color: var(--ink); }

article ul, article ol { padding-left: 1.25rem; }
article li { margin: 0.35em 0; }
article li::marker { color: var(--valve); }
article li > ul { margin-top: 0.35em; }

article img, .preview img { display: block; max-width: 100%; height: auto; border: 2px solid var(--ink); background: var(--plate); margin: 1.5rem 0; }

blockquote { margin: 1.5rem 0; padding-left: 1.25rem; border-left: 0.35rem solid var(--valve); }
code, pre { font-size: 0.9em; }
pre { overflow-x: auto; padding: 1rem; background: var(--plate); border: 2px solid var(--ink); }

label { display: block; margin: 1.25rem 0; font-family: var(--sans); font-weight: 600; font-size: 1rem; }
label small { font-weight: 400; color: var(--muted); }
input, textarea {
  display: block;
  width: 100%;
  margin-top: 0.4rem;
  padding: 0.65rem 0.75rem;
  font: 400 1rem/1.5 var(--serif);
  color: var(--ink);
  background: var(--plate);
  border: 2px solid var(--ink);
  border-radius: 0;
}
textarea { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.9375rem; }

button, a.button {
  display: inline-block;
  padding: 0.65rem 1.25rem;
  font: 700 1rem/1.2 var(--sans);
  color: var(--plate);
  background: var(--ink);
  border: 2px solid var(--ink);
  border-radius: 0;
  text-decoration: none;
  cursor: pointer;
}
button:hover:not(:disabled), a.button:hover { background: var(--valve); color: var(--ink); }
button:disabled { opacity: 0.55; cursor: progress; }
button.secondary { color: var(--ink); background: transparent; }
button.secondary:hover:not(:disabled) { background: var(--ink); color: var(--plate); }
button.danger { background: var(--rust); border-color: var(--rust); }
button.danger:hover:not(:disabled) { background: var(--ink); border-color: var(--ink); color: var(--plate); }
button.link { padding: 0; font-weight: 600; color: var(--rust); background: none; border: 0; text-decoration: underline; }
button.link:hover:not(:disabled) { background: none; color: var(--rust); text-decoration-thickness: 0.2em; }

.error, .flash { padding: 0.75rem 1rem; font-family: var(--sans); font-weight: 600; font-size: 1rem; border-left: 0.35rem solid; background: var(--plate); }
.error { color: var(--rust); border-color: var(--rust); }
.flash { color: var(--gauge); border-color: var(--gauge); }

.pages { list-style: none; margin: 2rem 0; padding: 0; border-top: 2px solid var(--ink); }
.pages li { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.25rem 1.25rem; padding: 0.75rem 0; border-bottom: 1px solid var(--muted); font-family: var(--sans); font-size: 1rem; }
.page-path { margin-right: auto; font-weight: 700; }
p.page-path { margin: 0; font-size: 1.5rem; font-family: var(--sans); }

.modal { width: min(30rem, calc(100% - 2.5rem)); margin: auto; padding: 1.75rem; color: var(--ink); background: var(--plate); border: 2px solid var(--ink); border-radius: 0; box-shadow: 0.5rem 0.5rem 0 var(--valve); }
.modal::backdrop { background: rgba(22, 39, 59, 0.7); }
.modal h2 { margin: 0 0 0.5rem; font-size: 1.5rem; overflow-wrap: anywhere; }
.modal p { margin: 0; }

.editor { display: grid; gap: 1.5rem; }
.preview { min-height: 6rem; margin-top: 0.4rem; padding: 0.5rem 1.25rem; background: var(--plate); border: 2px solid var(--ink); }
.preview > h1 { font-size: 2rem; }
.form-actions { display: flex; align-items: center; gap: 1.5rem; margin-top: 1.5rem; }

@media (min-width: 48rem) {
  .page { padding: 1.5rem 2.5rem 6rem; }
  body { font-size: 1.1875rem; }
}
@media (min-width: 64rem) {
  .page:has(.editor) { max-width: 80rem; }
  .editor { grid-template-columns: 1fr 1fr; }
}