:root {
  --bg: #fafafa;
  --fg: #1a1a1a;
  --muted: #666;
  --line: #ddd;
  --code-bg: #f0f0f0;
  --link: #0b5cad;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111;
    --fg: #e6e6e6;
    --muted: #999;
    --line: #333;
    --code-bg: #1c1c1c;
    --link: #c4a7ff;
  }
}

:root[data-theme="dark"] {
  --bg: #111;
  --fg: #e6e6e6;
  --muted: #999;
  --line: #333;
  --code-bg: #1c1c1c;
  --link: #c4a7ff;
  color-scheme: dark;
}

:root[data-theme="light"] { color-scheme: light; }

[hidden] { display: none !important; }

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 3rem 1.25rem;
}

h1 { font-size: 1.75rem; margin: 0 0 2rem; }

h2 {
  font-size: .8rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 2.5rem 0 .75rem;
}

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

.topbar { display: flex; justify-content: flex-end; margin: -1.5rem 0 1.5rem; }
.theme-toggle {
  padding: .25rem .7rem;
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--line);
  border-radius: 6px;
  font-family: inherit;
  font-size: .85rem;
  line-height: 1.4;
  cursor: pointer;
}
.theme-toggle:hover { border-color: var(--muted); }
.theme-toggle:focus-visible { outline: 2px solid var(--link); outline-offset: 2px; }

dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: .5rem 1.5rem;
  margin: 0;
}
dt { color: var(--muted); }
dd { margin: 0; overflow-wrap: anywhere; }

.key { margin: 0 0 1.25rem; }
.key p { margin: 0 0 .35rem; color: var(--muted); font-size: .9rem; }

pre {
  margin: 0;
  padding: .75rem 1rem;
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow-x: auto;
  font: .85rem/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

main.error h2 { margin-top: 0; }
main.error h1 { margin-bottom: .75rem; }
main.error p { color: var(--muted); margin: 0 0 2rem; }

.lead { margin: -1.5rem 0 0; color: var(--muted); }

.radios { display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; }

.radio,
.check {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .95rem;
}

.radio input,
.check input {
  width: 1rem;
  height: 1rem;
  margin: 0;
  accent-color: var(--link);
}

.checks { display: grid; gap: .4rem; margin-bottom: 1rem; }

.field { margin-bottom: 1rem; }
.field > label {
  display: block;
  margin-bottom: .3rem;
  color: var(--muted);
  font-size: .9rem;
}

input[type="text"],
input[type="number"],
select {
  width: 100%;
  max-width: 24rem;
  padding: .4rem .55rem;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
  font-size: .95rem;
}

select { cursor: pointer; }

input[type="range"] {
  width: 100%;
  max-width: 24rem;
  accent-color: var(--link);
}

.range-row { display: flex; align-items: center; gap: .75rem; }
.range-row output {
  min-width: 2.5rem;
  color: var(--muted);
  font: .85rem/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

input:focus-visible,
select:focus-visible,
button:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
}

.button {
  padding: .45rem .9rem;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--line);
  border-radius: 6px;
  font-family: inherit;
  font-size: .9rem;
  line-height: 1.4;
  cursor: pointer;
}
.button:hover { border-color: var(--muted); }

.button.primary {
  background: var(--link);
  color: #fff;
  border-color: var(--link);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .button.primary { color: #111; }
}
:root[data-theme="dark"] .button.primary { color: #111; }

.actions { display: flex; flex-wrap: wrap; gap: .6rem; margin: 1.25rem 0; }

.error-line {
  margin: 0 0 1.25rem;
  padding-left: .6rem;
  border-left: 2px solid var(--link);
  color: var(--fg);
  font-size: .9rem;
}

.pw { margin-bottom: 1.5rem; }
.pw:last-child { margin-bottom: 0; }

.pw-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem .9rem;
  margin-top: .5rem;
  color: var(--muted);
  font-size: .85rem;
}

.pw-entropy { font: .85rem/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

.strength { display: inline-flex; gap: 3px; }
.strength i {
  display: inline-block;
  width: 14px;
  height: 6px;
  border-radius: 3px;
  background: var(--line);
}
.strength i.on { background: var(--link); }

.pw-strength-label { text-transform: capitalize; }

@media (max-width: 30rem) {
  dl { grid-template-columns: 1fr; gap: 0; }
  dd { margin-bottom: .75rem; }
  input[type="text"],
  input[type="number"],
  select,
  input[type="range"] { max-width: 100%; }
  .actions .button { flex: 1 1 auto; }
}