:root {
  --bg: #f6f7f9; --surface: #ffffff; --ink: #1c2024; --muted: #60646c; --line: #e0e3e8;
  --accent: #2563eb; --accent-ink: #ffffff; --accent-soft: #e8efff;
  --ok: #2b8a3e; --ok-soft: #e6f6ea; --bad: #c92a2a; --bad-soft: #fdecec; --warn-soft: #fff4e0;
  --radius: 14px; --shadow: 0 1px 2px rgb(16 24 40 / 6%), 0 1px 3px rgb(16 24 40 / 8%);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111315; --surface: #1a1d21; --ink: #e8eaed; --muted: #9ba1a6; --line: #2c3036;
    --accent: #6d9bff; --accent-ink: #0b1020; --accent-soft: #1d2a4a;
    --ok: #69db7c; --ok-soft: #173322; --bad: #ff8787; --bad-soft: #3b1d1d; --warn-soft: #3a2c12;
    --shadow: none; color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", "Noto Sans Thai", "Noto Sans Myanmar", Padauk, sans-serif;
}
a { color: var(--accent); }
h1 { font-size: 1.75rem; line-height: 1.25; margin: .2em 0 .4em; }
h2 { font-size: 1.3rem; margin: 2.2rem 0 .8rem; }
h3 { font-size: 1.1rem; margin: 0 0 .6rem; }
.muted { color: var(--muted); }
.page { max-width: 820px; margin: 0 auto; padding: 16px 16px 80px; }

.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 10px 16px; background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.brand { font-weight: 700; color: var(--ink); text-decoration: none; display: flex; align-items: center; gap: 8px; }
.brand .dot { width: 12px; height: 12px; border-radius: 4px; background: var(--accent); }
.top nav { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; font-size: .95rem; }
.top nav a { text-decoration: none; }
.langs { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; }
.langs a { padding: 2px 10px; color: var(--muted); }
.langs a.on { background: var(--accent-soft); color: var(--ink); font-weight: 600; }
.count { display: inline-block; min-width: 1.4em; padding: 0 6px; border-radius: 999px; background: var(--bad); color: #fff;
  font-size: .8rem; text-align: center; }

button, .button { font: inherit; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  padding: 8px 14px; cursor: pointer; text-decoration: none; display: inline-block; }
button.primary, .button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
button.big { padding: 12px 22px; font-size: 1.05rem; }
button.link { border: 0; background: none; color: var(--accent); padding: 0; }
button.danger { color: var(--bad); }
form.inline { display: inline; }
textarea, input[type=search], select { font: inherit; width: 100%; padding: 10px 12px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink); }

.flash, .flash-inline { background: var(--ok-soft); padding: 10px 16px; border-radius: 10px; }
.flash { max-width: 820px; margin: 12px auto 0; }
.error { background: var(--bad-soft); color: var(--bad); padding: 10px 14px; border-radius: 10px; }
.badge { display: inline-block; font-size: .8rem; padding: 1px 9px; border-radius: 999px; background: var(--line); color: var(--ink); }
.badge.new { background: var(--accent); color: var(--accent-ink); }
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.info { background: var(--warn-soft); }
.tag { font-size: .78rem; color: var(--muted); border: 1px solid var(--line); border-radius: 6px; padding: 0 6px; }

.login { max-width: 420px; margin: 12vh auto; text-align: center; background: var(--surface); padding: 32px 24px;
  border-radius: var(--radius); box-shadow: var(--shadow); }

.changes { list-style: none; padding: 0; display: grid; gap: 12px; }
.change-card { display: grid; gap: 4px; padding: 18px; background: var(--surface); border-radius: var(--radius);
  box-shadow: var(--shadow); border: 1px solid var(--line); color: var(--ink); text-decoration: none; }
.change-card strong { font-size: 1.15rem; }
.change-card .badges { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 6px; }
.date { font-size: .85rem; color: var(--muted); }

.back { display: inline-block; margin: 4px 0 8px; text-decoration: none; }
.hero .lead { font-size: 1.15rem; background: var(--accent-soft); padding: 14px 16px; border-radius: var(--radius); }
.toc { display: flex; gap: 8px; flex-wrap: wrap; margin: 14px 0 0; }
.toc a { font-size: .9rem; padding: 4px 12px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface);
  text-decoration: none; color: var(--ink); }

.cards { list-style: none; padding: 0; display: grid; gap: 16px; }
.card, .role, .thread, .quiz, .ask-general, .faq { background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; }
.card { position: relative; padding-top: 20px; }
.card .num, .quiz .num { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%;
  background: var(--accent); color: var(--accent-ink); font-weight: 700; font-size: .9rem; margin-right: 8px; }
.card h3 { display: inline; vertical-align: middle; }
.card .body, .role .body { margin-top: 8px; }
.card .body p:first-child { margin-top: 0; }
.figure { display: block; margin: 12px 0; border-radius: 10px; overflow: hidden; border: 1px solid var(--line); background: #fff; }
.figure img { display: block; width: 100%; height: auto; }

.role-pick { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.chip { border-radius: 999px; padding: 6px 14px; }
.chip.on { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.role { margin-bottom: 16px; }
.steps { padding-left: 1.3em; display: grid; gap: 14px; }
.steps li::marker { font-weight: 700; color: var(--accent); }

details.ask, details.faq-form { margin-top: 10px; }
details.ask summary, details.faq-form summary { cursor: pointer; color: var(--accent); font-size: .95rem; }
details.ask form, details.faq-form form, .ask-general form, .reply { display: grid; gap: 8px; margin-top: 8px; }
details.ask form button, .ask-general form button, .reply button { justify-self: start; }

.quiz { margin-bottom: 12px; display: grid; gap: 8px; }
.quiz .q { font-weight: 600; margin: 0 0 4px; }
.choice { text-align: left; width: 100%; }
.choice.right { border-color: var(--ok); background: var(--ok-soft); }
.choice.wrong { border-color: var(--bad); background: var(--bad-soft); }
.why { margin: 4px 0 0; min-height: 1em; }

.faq { margin-bottom: 8px; padding: 12px 16px; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq .body { white-space: pre-wrap; margin-top: 8px; }

.thread { margin-bottom: 12px; }
.thread .meta { font-size: .88rem; color: var(--muted); margin: 0 0 8px; }
.msg { white-space: pre-wrap; padding: 10px 12px; border-radius: 12px; margin: 6px 0; max-width: 92%; }
.msg.mine { background: var(--accent-soft); margin-left: auto; }
.msg.theirs { background: var(--bg); border: 1px solid var(--line); }
.msg.fresh { outline: 2px solid var(--accent); }
.msg .who { display: block; font-size: .8rem; color: var(--muted); }

.done { text-align: center; margin-top: 32px; }

table.grid { width: 100%; border-collapse: collapse; background: var(--surface); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); font-size: .95rem; }
table.grid th, table.grid td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.grid .actions { white-space: nowrap; }
.tabs a { margin-right: 12px; text-decoration: none; }
.tabs a.on { font-weight: 700; text-decoration: underline; }

.picker-tools { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; position: sticky; top: 52px;
  background: var(--bg); padding: 8px 0; z-index: 2; }
.picker-tools input[type=search], .picker-tools .muted { flex: 1 0 100%; }
.picker-tools select { flex: 1 1 200px; width: auto; }
.people { list-style: none; padding: 0; display: grid; gap: 6px; }
.person label { display: flex; gap: 10px; align-items: flex-start; padding: 10px 12px; background: var(--surface);
  border: 1px solid var(--line); border-radius: 10px; cursor: pointer; }
.person input { margin-top: 5px; width: 18px; height: 18px; }
.sticky-save { position: sticky; bottom: 0; padding: 12px 0; background: var(--bg); }

@media (max-width: 560px) {
  h1 { font-size: 1.45rem; }
  table.grid { display: block; overflow-x: auto; }
  .top nav { gap: 10px; }
}