:root {
  color-scheme: light dark;
  --bg: #f6f6f3; --fg: #1c1c1a; --muted: #62625c; --card: #fff; --border: #d8d8d2;
  --accent: #2a5adf; --on-accent: #fff; --ok-bg: #e4f6ec; --ok-fg: #17693b; --err-bg: #fbeaea; --err-fg: #a12d22;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615; --fg: #ececE8; --muted: #a3a39c; --card: #20201e; --border: #3a3a36;
    --accent: #8aa8ff; --on-accent: #10131c; --ok-bg: #16301f; --ok-fg: #8fdcae; --err-bg: #3a1c19; --err-fg: #f2a59c;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); }
main { max-width: 640px; margin: 0 auto; padding: 24px 16px; }
h1 { font-size: 1.6rem; margin: 16px 0 8px; }
.lead { color: var(--muted); margin: 0 0 20px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
label, legend { display: block; font-weight: 600; font-size: .9rem; margin: 14px 0 4px; padding: 0; }
.card > label:first-of-type { margin-top: 0; }
input[type=text], input[type=url], input[type=datetime-local], input[type=file], select, textarea {
  display: block; width: 100%; padding: 10px; font: inherit; color: inherit;
  background: var(--bg); border: 1px solid var(--border); border-radius: 6px;
}
textarea { resize: vertical; }
fieldset { border: 0; margin: 0; padding: 0; }
.check { font-weight: 400; margin: 4px 0; }
details { margin-top: 14px; }
summary { cursor: pointer; font-size: .9rem; color: var(--muted); }
button { margin-top: 16px; padding: 10px 18px; font: inherit; font-weight: 600; color: var(--on-accent); background: var(--accent); border: 1px solid var(--accent); border-radius: 6px; cursor: pointer; }
button.quiet { margin: 0; padding: 4px 10px; font-weight: 400; font-size: .85rem; color: var(--fg); background: transparent; border-color: var(--border); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.hint { color: var(--muted); font-size: .85rem; margin: 12px 0 0; }
.bar { display: flex; justify-content: space-between; align-items: center; gap: 12px; font-size: .9rem; margin-bottom: 12px; overflow-wrap: anywhere; }
.tabs { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 14px; }
.tabs a { padding: 5px 11px; border-radius: 999px; font-size: .88rem; text-decoration: none; color: var(--fg); border: 1px solid var(--border); }
.tabs a[aria-current] { color: var(--on-accent); background: var(--accent); border-color: var(--accent); }
.msg { padding: 10px 14px; border-radius: 6px; margin: 0 0 14px; overflow-wrap: anywhere; }
.msg.ok { background: var(--ok-bg); color: var(--ok-fg); }
.msg.ok a { color: inherit; }
.msg.error { background: var(--err-bg); color: var(--err-fg); }
footer { max-width: 640px; margin: 0 auto; padding: 8px 16px 32px; color: var(--muted); font-size: .85rem; }