/* plain.css — the one stylesheet for plainkit.lol
   Rules: system fonts, one accent, no framework, readable on a phone, prints cleanly. */

:root {
  --ink: #171717;
  --ink-2: #4b4b4b;
  --ink-3: #7a7a7a;
  --paper: #fbfaf7;
  --paper-2: #f1efe9;
  --line: #d9d6cd;
  --accent: #0f766e;
  --accent-ink: #ffffff;
  --warn: #b45309;
  --warn-bg: #fff4e0;
  --ok: #15803d;
  --ok-bg: #e9f7ec;
  --max: 44rem;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #ececec;
    --ink-2: #bdbdbd;
    --ink-3: #8f8f8f;
    --paper: #151515;
    --paper-2: #1f1f1f;
    --line: #333;
    --accent: #2dd4bf;
    --accent-ink: #062b28;
    --warn: #fbbf24;
    --warn-bg: #2a2110;
    --ok: #4ade80;
    --ok-bg: #0f2a18;
  }
}

* { box-sizing: border-box; }

html { color-scheme: light dark; }

body {
  margin: 0;
  font: 17px/1.55 var(--sans);
  color: var(--ink);
  background: var(--paper);
  -webkit-text-size-adjust: 100%;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.5rem 1rem 4rem;
}

/* header / wordmark */
.top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.25rem 0 1.5rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 2rem;
}
.wordmark {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}
.wordmark b { color: var(--accent); font-weight: 700; }
.top nav a {
  color: var(--ink-2);
  text-decoration: none;
  font-size: 0.95rem;
  margin-left: 1rem;
}
.top nav a:hover { color: var(--ink); text-decoration: underline; }

h1 { font-size: 1.85rem; line-height: 1.2; letter-spacing: -0.015em; margin: 0 0 0.5rem; }
h2 { font-size: 1.25rem; margin: 2.25rem 0 0.6rem; }
h3 { font-size: 1.05rem; margin: 1.5rem 0 0.4rem; }
p, ul, ol { margin: 0 0 1rem; }
.lede { font-size: 1.15rem; color: var(--ink-2); margin-bottom: 1.5rem; }
.muted { color: var(--ink-3); }
.small { font-size: 0.9rem; }
a { color: var(--accent); }
code { font-family: var(--mono); font-size: 0.92em; background: var(--paper-2); padding: 0.1em 0.35em; border-radius: 3px; }
hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }

/* forms */
.field { margin: 0 0 1.25rem; }
.field > label, .field > .q {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
}
.help { font-size: 0.9rem; color: var(--ink-3); margin: 0.25rem 0 0; }
select, input[type="text"], input[type="number"] {
  font: inherit;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.55rem 0.7rem;
  width: 100%;
  max-width: 24rem;
}
select:focus, input:focus, button:focus-visible, .choice:focus-within {
  outline: 3px solid color-mix(in srgb, var(--accent) 45%, transparent);
  outline-offset: 2px;
}
.choices { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.choice {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  cursor: pointer;
  font-size: 0.95rem;
}
.choice:has(input:checked) {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, var(--paper));
}
.choice input { margin: 0; accent-color: var(--accent); }

button, .btn {
  font: inherit;
  font-weight: 600;
  color: var(--accent-ink);
  background: var(--accent);
  border: 0;
  border-radius: 6px;
  padding: 0.65rem 1.1rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
button.secondary, .btn.secondary {
  color: var(--ink);
  background: var(--paper-2);
  border: 1px solid var(--line);
}
button:hover, .btn:hover { filter: brightness(0.95); }

/* result blocks */
.card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  margin: 0 0 1rem;
  background: var(--paper);
}
.card h3 { margin-top: 0; }
.note { border-left: 4px solid var(--accent); padding: 0.6rem 0.9rem; background: var(--paper-2); border-radius: 0 6px 6px 0; margin: 0 0 1rem; }
.note.warn { border-color: var(--warn); background: var(--warn-bg); }
.note.ok { border-color: var(--ok); background: var(--ok-bg); }
.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  background: var(--paper-2);
  color: var(--ink-2);
  vertical-align: middle;
}
.tag.must { background: var(--warn-bg); color: var(--warn); }
.tag.doc { background: var(--ok-bg); color: var(--ok); }

.check { list-style: none; padding: 0; margin: 0 0 1rem; }
.check li {
  display: grid;
  grid-template-columns: 1.4rem 1fr;
  gap: 0.5rem;
  align-items: start;
  padding: 0.55rem 0;
  border-top: 1px solid var(--line);
}
.check li:first-child { border-top: 0; }
.check li input { margin-top: 0.3rem; accent-color: var(--accent); }
.check .ev { display: block; font-size: 0.9rem; color: var(--ink-3); margin-top: 0.15rem; }

/* subscribe box */
.subscribe .q { margin-bottom: 0.5rem; }
.subscribe-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.subscribe-row input[type="email"] { flex: 1 1 14rem; max-width: 24rem; }

/* tool index on the landing page */
.tools { list-style: none; padding: 0; margin: 0; }
.tools li { padding: 1rem 0; border-top: 1px solid var(--line); }
.tools li:first-child { border-top: 0; }
.tools a { font-weight: 600; font-size: 1.1rem; }
.tools .d { display: block; color: var(--ink-2); }

footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--ink-3);
}
footer a { color: inherit; }

@media print {
  body { font-size: 12pt; background: #fff; color: #000; }
  .top nav, button, .btn, .no-print { display: none !important; }
  .wrap { max-width: none; padding: 0; }
  .card, .note { break-inside: avoid; }
  a { color: inherit; text-decoration: none; }
}