:root {
  --bg: #fbfaf7; --card: #fff; --ink: #1f1d1a; --mute: #65605a; --line: #e4e0d8; --accent: #b4441c; --on-accent: #fff;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #151412; --card: #1f1d1a; --ink: #eeebe5; --mute: #aaa49b; --line: #35322d; --accent: #f08a5d; --on-accent: #1f1d1a; color-scheme: dark; }
}
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); }
.wrap { max-width: 42rem; margin: 0 auto; padding: 0 16px; }
header { border-bottom: 1px solid var(--line); background: var(--card); padding: .7rem 0; }
header a { font-weight: 700; font-size: 1.2rem; color: var(--ink); text-decoration: none; }
header a span { color: var(--accent); }
h1 { font-size: 2rem; line-height: 1.2; margin: 2rem 0 .5rem; }
h2 { font-size: 1.3rem; margin: 2rem 0 .5rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: .6rem; padding: 1.1rem; margin: 1rem 0; }
.big { font-size: 1.25rem; font-weight: 700; }
.button { display: inline-block; background: var(--accent); color: var(--on-accent); text-decoration: none; font-weight: 700;
  padding: .7rem 1.2rem; border-radius: .5rem; margin-top: .5rem; }
.bubble { background: var(--bg); border: 1px solid var(--line); border-radius: 1rem; padding: .5rem .8rem; margin: .4rem 0; max-width: 85%; overflow-wrap: anywhere; }
.bubble.me { margin-left: auto; width: fit-content; background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.muted { color: var(--mute); font-size: .9rem; }
footer { border-top: 1px solid var(--line); margin-top: 3rem; padding: 1.5rem 0; color: var(--mute); font-size: .9rem; }