/* Same palette as phx-lang.org. */
:root {
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --fg: #1d2129;
  --muted: #5c6370;
  --border: #e3e6ea;
  --accent: #6d28d9;
  --accent-soft: #ede9fe;
  --code-bg: #f6f8fa;
  --term-bg: #16181d;
  --term-fg: #e6e6e6;
  --ok-bg: #ecfdf3;
  --ok-fg: #14532d;
  --err-bg: #fef2f2;
  --err-fg: #991b1b;
  --radius: 10px;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", "Noto Sans JP", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --bg-soft: #161920;
    --fg: #e6e8eb;
    --muted: #9aa1ac;
    --border: #262a33;
    --accent: #a78bfa;
    --accent-soft: #241d3a;
    --code-bg: #161b22;
    --ok-bg: #12301f;
    --ok-fg: #bbf7d0;
    --err-bg: #3a1717;
    --err-fg: #fecaca;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 var(--sans);
}

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

code { font-family: var(--mono); font-size: 0.9em; }
:not(pre) > code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.05em 0.35em;
  overflow-wrap: anywhere;
}

pre {
  margin: 0 0 1.2em;
  padding: 1rem 1.1rem;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.55;
}

pre.term {
  background: var(--term-bg);
  color: var(--term-fg);
  border-color: var(--term-bg);
}

h1 { font-size: 2rem; line-height: 1.25; margin: 1.5rem 0 0.75rem; }
h2 { font-size: 1.2rem; margin: 1.75rem 0 0.5rem; }

header.site, main, footer {
  max-width: 52rem;
  margin: 0 auto;
  padding-left: 16px;
  padding-right: 16px;
}

header.site {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--fg);
}
.brand:hover { text-decoration: none; }
.brand span { color: var(--muted); font-weight: 500; }

nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1.1rem; }
nav a { color: var(--muted); }
nav a:hover { color: var(--fg); text-decoration: none; }
nav a[aria-current="page"] { color: var(--accent); font-weight: 600; }

main { padding-bottom: 2rem; }

footer {
  padding-top: 1rem;
  padding-bottom: 2rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.875rem;
}
footer p { margin: 0.25rem 0; }

.lead { font-size: 1.05rem; color: var(--muted); max-width: 44rem; }
.muted { color: var(--muted); }
.small { font-size: 0.875rem; }

.hero { padding: 1rem 0 0.5rem; }
.eyebrow {
  margin: 1.5rem 0 0;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.hero h1 { margin-top: 0.25rem; overflow-wrap: anywhere; }

input, textarea, button {
  font: inherit;
  color: inherit;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.45rem 0.7rem;
  max-width: 100%;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

button {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}
@media (prefers-color-scheme: dark) {
  button { color: #0f1115; }
}
button:disabled { opacity: 0.6; cursor: progress; }
button.secondary {
  background: transparent;
  color: var(--accent);
}

form.inline { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin: 1rem 0; }
.stack { display: grid; gap: 0.35rem; max-width: 32rem; margin: 1rem 0; }
.stack button { justify-self: start; margin-top: 0.5rem; }
.stack .small { margin: 0; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.card {
  display: block;
  color: inherit;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.25rem 1.25rem 0.5rem;
}
a.card:hover { border-color: var(--accent); text-decoration: none; }
.card h2 { color: var(--accent); margin-top: 1rem; }

.demo {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.25rem 1.25rem 0.75rem;
  margin: 1.5rem 0;
}
.demo h2 { font-size: 1.05rem; }
.out {
  background: var(--accent-soft);
  border-radius: 8px;
  padding: 0.6rem 0.9rem;
  overflow-wrap: anywhere;
}

.notice { border-radius: 8px; padding: 0.75rem 1.25rem; margin: 1rem 0; }
.notice.ok { background: var(--ok-bg); color: var(--ok-fg); }
.notice.error { background: var(--err-bg); color: var(--err-fg); }
ul.notice { padding-left: 2.25rem; }

.message {
  border-top: 1px solid var(--border);
  padding: 0.5rem 0;
  overflow-wrap: anywhere;
}
.message p { margin: 0.25rem 0; }
.message .meta span { color: var(--muted); font-size: 0.875rem; margin-left: 0.5rem; }

.totp { display: flex; flex-wrap: wrap; gap: 1.5rem; align-items: flex-start; margin: 1.5rem 0; }
.totp > div:last-child { flex: 1 1 18rem; }
.qr {
  width: 200px;
  max-width: 100%;
  padding: 12px;
  background: #fff;   /* QR codes need a light background in both themes */
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.qr svg { display: block; width: 100%; height: auto; }
.secret { word-break: break-all; }
details { margin: 1rem 0; }
summary { cursor: pointer; color: var(--accent); }

.counter { display: flex; flex-wrap: wrap; gap: 1.25rem; align-items: center; }
.counter button { min-width: 4rem; font-size: 1.1rem; }

.source { margin-top: 3rem; border-top: 1px solid var(--border); }
.source details { margin: 0.5rem 0; }
.source summary { font-family: var(--mono); font-size: 0.9rem; }
.source pre { margin-top: 0.5rem; }