:root {
  --bg: #fffaf5;
  --surface: #ffffff;
  --ink: #1f1a17;
  --muted: #6b625c;
  --line: #ece3da;
  --accent: #e0562a;
  --accent-ink: #ffffff;
  --accent-soft: #fdebe3;
  --radius: 14px;
  --max: 1040px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171412; --surface: #211d1a; --ink: #f4eee9; --muted: #b3a89f;
    --line: #362f2a; --accent: #ff7a4d; --accent-soft: #3a2419;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 17px/1.7 "Noto Sans Thai", system-ui, sans-serif;
}
h1, h2, h3, .brand { font-family: "Prompt", "Noto Sans Thai", sans-serif; line-height: 1.3; margin: 0 0 .5em; }
h1 { font-size: clamp(30px, 6vw, 52px); font-weight: 700; }
h2 { font-size: clamp(24px, 4vw, 34px); font-weight: 700; }
h3 { font-size: 19px; font-weight: 600; }
p { margin: 0 0 1em; }
a { color: var(--accent); }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }

/* header */
.top { border-bottom: 1px solid var(--line); background: var(--bg); position: sticky; top: 0; z-index: 5; }
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 12px; }
.brand { font-size: 21px; font-weight: 700; color: var(--ink); text-decoration: none; margin: 0; }
.brand span { color: var(--accent); }
.top nav { display: flex; gap: 18px; font-size: 15px; }
.top nav a { color: var(--muted); text-decoration: none; }
.top nav a:hover { color: var(--ink); }
@media (max-width: 640px) { .top nav .hide-sm { display: none; } }

/* hero */
.hero { padding-top: 56px; padding-bottom: 40px; }
.eyebrow { display: inline-block; background: var(--accent-soft); color: var(--accent); font-weight: 600; font-size: 14px; padding: 4px 12px; border-radius: 99px; margin-bottom: 16px; }
.hero .lead { font-size: 19px; color: var(--muted); max-width: 640px; }
.buy { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 24px; margin: 28px 0 10px; }
.price { font-family: "Prompt", sans-serif; font-size: 40px; font-weight: 700; line-height: 1; }
.price small { display: block; font: 14px "Noto Sans Thai", sans-serif; color: var(--muted); margin-top: 6px; }
.btn { display: inline-block; background: var(--accent); color: var(--accent-ink); font-family: "Prompt", sans-serif; font-weight: 600; font-size: 18px; padding: 14px 30px; border-radius: 99px; text-decoration: none; border: 0; cursor: pointer; }
.btn[aria-disabled="true"] { opacity: .55; cursor: default; }
.fine { font-size: 14px; color: var(--muted); }

/* sections */
section { padding: 44px 0; border-top: 1px solid var(--line); }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.card p { color: var(--muted); margin: 0; font-size: 16px; }
.icon { font-size: 26px; margin-bottom: 8px; }
ol.chapters { list-style: none; counter-reset: ch; padding: 0; margin: 0; display: grid; gap: 12px; }
ol.chapters li { counter-increment: ch; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px 16px 64px; position: relative; }
ol.chapters li::before { content: counter(ch); position: absolute; left: 18px; top: 16px; width: 32px; height: 32px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font: 700 16px/32px "Prompt", sans-serif; text-align: center; }
ol.chapters b { display: block; font-family: "Prompt", sans-serif; font-weight: 600; }
ol.chapters span { color: var(--muted); font-size: 16px; }
ul.ticks { padding: 0; margin: 0; list-style: none; display: grid; gap: 8px; }
ul.ticks li { padding-left: 28px; position: relative; }
ul.ticks li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }
.note { background: var(--accent-soft); border-radius: var(--radius); padding: 20px 22px; }
.note ul { margin: 0; padding-left: 20px; }
details { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 18px; margin-bottom: 10px; }
summary { cursor: pointer; font-weight: 600; }
details p { margin: 10px 0 0; color: var(--muted); }

/* footer */
footer { border-top: 1px solid var(--line); padding: 32px 0 96px; font-size: 14px; color: var(--muted); }
footer nav { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-bottom: 12px; }
footer a { color: var(--muted); }

/* sticky buy bar on phones */
.bar { display: none; }
@media (max-width: 640px) {
  .bar { display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 6; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 16px; background: var(--surface); border-top: 1px solid var(--line); }
  .bar .price { font-size: 26px; }
  .bar .btn { padding: 11px 22px; font-size: 16px; }
}

/* policy pages */
.doc { padding-top: 40px; padding-bottom: 20px; max-width: 760px; }
.doc h2 { font-size: 22px; margin-top: 1.6em; }
.doc ul, .doc ol { padding-left: 22px; }
.doc .meta { color: var(--muted); font-size: 15px; }

/* placeholder still to fill in (remove before launch) */
.todo { background: #fff3a8; color: #5a4a00; padding: 0 4px; border-radius: 4px; }