:root {
  --bg: #f6f1e7; --panel: #fffaf0; --ink: #2a2420; --muted: #6b6158;
  --line: #e2d8c6; --accent: #8a3b12; --accent-ink: #fff; --lock: #efe6d6;
  --warn: #9a6a00; --radius: 10px;
  font-family: "Chakra Petch", "Noto Sans Thai", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #17181c; --panel: #1f2126; --ink: #ebe6de; --muted: #a39b90;
          --line: #33363d; --accent: #e8914f; --accent-ink: #1a1a1a; --lock: #26282e; --warn: #e3b341; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); line-height: 1.7; font-size: 17px; }
a { color: var(--accent); }
header.top { position: sticky; top: 0; z-index: 5; background: var(--panel); border-bottom: 1px solid var(--line); }
.bar { max-width: 820px; margin: 0 auto; padding: 8px 16px; display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; }
.brand { font-weight: 700; text-decoration: none; color: var(--ink); }
nav.links { display: flex; gap: 12px; flex-wrap: wrap; font-size: 15px; }
#progress { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font-size: 14px; width: 100%; }
#progress .plabel { color: var(--muted); }
select, button { font: inherit; font-size: 14px; color: var(--ink); background: var(--bg); border: 1px solid var(--line);
  border-radius: 8px; padding: 4px 8px; max-width: 100%; }
button { cursor: pointer; }
main { max-width: 820px; margin: 0 auto; padding: 16px 16px 64px; }
h1 { font-size: 1.6rem; line-height: 1.3; margin: .6em 0 .3em; }
h2 { font-size: 1.3rem; margin: 1.6em 0 .4em; line-height: 1.35; }
h3 { font-size: 1.08rem; margin: 1.2em 0 .3em; }
.card, section.gated, article.mech { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 4px 16px 12px; margin: 16px 0; }
section.gated > .gtitle, article.mech > h2:first-child { margin-top: .6em; }
code { font-size: .85em; background: var(--lock); padding: 1px 5px; border-radius: 5px; }
.meta, .sources { color: var(--muted); font-size: 14px; }
.sources ul { padding-left: 1.2em; margin: .3em 0; }
.sources li { overflow-wrap: anywhere; }
ul, ol { padding-left: 1.3em; }
blockquote { margin: .6em 0; padding: .2em 12px; border-left: 3px solid var(--accent); color: var(--muted); }
table { border-collapse: collapse; width: 100%; display: block; overflow-x: auto; font-size: 15px; }
th, td { border: 1px solid var(--line); padding: 4px 8px; text-align: left; vertical-align: top; }

/* gate: ซ่อนเนื้อหาไว้ก่อนเสมอ แล้ว JS เปิดเฉพาะที่อยู่ในความคืบหน้า */
[data-act] > .gbody { display: none; }
html.js [data-act]:not(.locked) > .gbody, [data-act].peek > .gbody { display: block; }
[data-act] > .glock { display: none; }
[data-act].locked > .glock { display: flex; }
.glock { flex-wrap: wrap; gap: 8px; align-items: center; justify-content: space-between; background: var(--lock);
  border-radius: 8px; padding: 8px 12px; margin: 10px 0; font-size: 15px; color: var(--muted); }
[data-act].peek > .glock { opacity: .7; }
noscript p { background: var(--lock); padding: 8px 12px; border-radius: 8px; }

/* สปอยล์: ซ่อนเสมอ · ก่อน JS ห่อเนื้อหาเข้า .sbody ซ่อนทั้งกล่อง (ข้อความที่วางตรงๆ ในกล่องก็ไม่หลุด) */
.spoiler { border: 1px dashed var(--warn); border-radius: 8px; padding: 6px 12px; margin: 10px 0; }
.spoiler:not(.ready) { display: none; }
.spoiler > .sbody { display: none; }
.spoiler.open > .sbody { display: block; }
.sbtn { color: var(--warn); border-color: var(--warn); }

/* เช็คลิสต์ */
ul.checklist { list-style: none; padding-left: 0; }
ul.checklist li { margin: 6px 0; }
ul.checklist label { display: flex; gap: 10px; align-items: flex-start; cursor: pointer; }
ul.checklist input { width: 20px; height: 20px; margin-top: 4px; flex: none; accent-color: var(--accent); }
ul.checklist input:checked + * , ul.checklist label:has(input:checked) { color: var(--muted); }
.ccount { font-size: 14px; color: var(--muted); margin: .4em 0 0; }
.conf { font-size: 12px; border: 1px solid var(--line); border-radius: 999px; padding: 0 6px; color: var(--muted); white-space: nowrap; }
footer { max-width: 820px; margin: 0 auto; padding: 16px; color: var(--muted); font-size: 13px; }