:root {
  --bg: #fbfaf8;
  --surface: #ffffff;
  --ink: #1c1b19;
  --muted: #6b6864;
  --line: #e4e0da;
  --accent: #1f6b3a;
  --accent-ink: #ffffff;
  --danger: #a5321f;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161513;
    --surface: #1f1e1b;
    --ink: #f2f0ec;
    --muted: #a09c96;
    --line: #33312d;
    --accent: #4fae74;
    --accent-ink: #10231a;
    --danger: #e0836f;
  }
}

* { box-sizing: border-box; }

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

.page { max-width: 44rem; margin: 0 auto; padding: 2rem 1.25rem 4rem; }

header.bar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--line);
}

header.bar a { color: inherit; }
header.bar .brand { font-weight: 650; letter-spacing: -0.01em; text-decoration: none; }
header.bar nav { display: flex; gap: 1rem; font-size: 0.9rem; }

h1 { font-size: 1.6rem; letter-spacing: -0.02em; margin: 0 0 0.35rem; }
h2 { font-size: 1.05rem; margin: 0 0 0.5rem; }
p { margin: 0 0 1rem; }
.lede { color: var(--muted); margin-bottom: 2rem; }
.muted { color: var(--muted); }
small { color: var(--muted); }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.card h2 { display: flex; align-items: center; gap: 0.5rem; }

.tag {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
}
.tag.on { color: var(--accent); border-color: var(--accent); }

label { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 0.3rem; }

input[type="text"], input[type="email"], input[type="password"] {
  width: 100%;
  padding: 0.6rem 0.7rem;
  margin-bottom: 1rem;
  font: inherit;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
}

input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

input[type="submit"], button, .button {
  font: inherit;
  font-weight: 550;
  padding: 0.6rem 1.1rem;
  border-radius: 8px;
  border: 1px solid transparent;
  background: var(--accent);
  color: var(--accent-ink);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}

.button.quiet, button.quiet, input.quiet {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.actions { display: flex; gap: 0.6rem; align-items: center; flex-wrap: wrap; }

a { color: var(--accent); }

code, .url {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9rem;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.2rem 0.4rem;
  word-break: break-all;
}

.url { display: block; padding: 0.7rem; }

.flash { padding: 0.7rem 1rem; border-radius: 8px; margin-bottom: 1.5rem; border: 1px solid; }
.flash.notice { color: var(--accent); border-color: var(--accent); }
.flash.alert { color: var(--danger); border-color: var(--danger); }

ul.plain { list-style: none; padding: 0; margin: 0; }
ul.plain li { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 0.6rem 0; border-bottom: 1px solid var(--line); }
ul.plain li:last-child { border-bottom: 0; }

ol.steps { padding-left: 1.2rem; }
ol.steps li { margin-bottom: 0.4rem; }

.errors { color: var(--danger); font-size: 0.9rem; margin-bottom: 1rem; }