:root {
  --navy: #1a3c6e;
  --navy-deep: #142e54;
  --orange: #ffb84d;
  --bg: #f0f2f5;
  --ink: #1a1a1a;
  --muted: #5c6570;
  --line: #d8dde5;
  --yt: #ff0000;
  --font: "Leelawadee UI", Tahoma, sans-serif;
  --max: 960px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
}
a { color: var(--navy); }
img { max-width: 100%; display: block; }
.wrap { width: min(var(--max), calc(100% - 32px)); margin-inline: auto; }

.top {
  background: var(--navy);
  color: #fff;
  min-height: 52px;
  display: flex;
  align-items: center;
}
.top .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: min(1120px, calc(100% - 32px));
}
.brand {
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 16px;
}
.nav { display: flex; gap: 8px; align-items: center; }
.nav a {
  color: #fff;
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 14px;
}
.nav a:hover { background: rgba(255,255,255,.12); }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border: 0;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  border-radius: 8px;
  padding: 10px 16px;
  background: var(--orange);
  color: #222;
}
.btn.ghost {
  background: #e8eaf0;
  color: var(--navy);
}
.btn.navy { background: var(--navy); color: #fff; }

.hero { padding: 28px 0 8px; }
.hero h1 {
  margin: 0 0 10px;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: var(--navy-deep);
  line-height: 1.25;
}
.lede { margin: 0 0 18px; color: var(--muted); max-width: 38rem; }
.cta-row { display: flex; flex-wrap: wrap; gap: 8px; }
.cta-help {
  align-self: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--muted);
}

.yt-block { padding: 12px 0 48px; }
.yt-block h2 { margin: 0 0 6px; font-size: 1.2rem; color: var(--navy-deep); }
.yt-url {
  margin: 0 0 12px;
  font-size: 13px;
  color: var(--muted);
}
.mock-tag {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 7px;
  border-radius: 999px;
  background: #eee;
  color: #555;
  font-size: 11px;
  font-weight: 700;
}

.yt-player {
  background: #0f0f0f;
  border-radius: 12px;
  overflow: hidden;
}
.yt-screen {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #000;
  overflow: hidden;
}
.yt-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  background: #111;
}
.yt-caption {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 48px;
  background: rgba(0,0,0,.72);
  color: #fff;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 15px;
  display: none;
}
.yt-caption.show { display: block; }
.yt-bigplay {
  position: absolute;
  inset: 0;
  margin: auto;
  width: 68px;
  height: 48px;
  border: 0;
  border-radius: 14px / 12px;
  background: var(--yt);
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  display: grid;
  place-items: center;
  padding: 0 0 0 4px;
}
.yt-bigplay.hidden { display: none; }
.yt-bar { background: #0f0f0f; padding: 6px 10px 10px; color: #fff; }
.yt-progress {
  height: 4px;
  background: #5a5a5a;
  border-radius: 2px;
  cursor: pointer;
  margin-bottom: 8px;
}
.yt-played {
  height: 100%;
  width: 0;
  background: var(--yt);
  border-radius: 2px;
}
.yt-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
}
.yt-controls button {
  background: none;
  border: 0;
  color: #fff;
  cursor: pointer;
  font-size: 14px;
  padding: 2px 4px;
}
.yt-logo {
  margin-left: auto;
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 13px;
}
.yt-logo span { color: var(--yt); }

.yt-frame {
  display: none;
  aspect-ratio: 16 / 9;
  background: #000;
}
.yt-frame.show { display: block; }
.yt-frame iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.yt-meta { margin-top: 14px; }
.yt-meta h3 { margin: 0 0 4px; font-size: 1.15rem; }
.yt-meta p { margin: 0; color: var(--muted); font-size: 14px; }

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding-bottom: 48px;
}
.step {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px;
}
.step b { color: var(--navy); }
.step p { margin: 6px 0 0; color: var(--muted); font-size: 14px; }

.foot {
  border-top: 1px solid var(--line);
  padding: 20px 0 32px;
  color: var(--muted);
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.lang {
  opacity: .85;
  font-size: 13px;
}

.howto {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  padding: 8px 0 40px;
}
.howto .step { min-width: 0; }
.howto .step b { display: block; margin-bottom: 4px; }

.price-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  margin: 12px 0 8px;
  font-size: 15px;
}
.price-table th,
.price-table td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
}
.price-table th { background: #eef2f8; color: var(--navy-deep); }
.price-table .num { font-variant-numeric: tabular-nums; white-space: nowrap; }
.price-table .recommend td { background: #f4f8ff; }
.price-table .recommend .num { font-weight: 700; }
.price-note { color: var(--muted); font-size: 14px; margin: 0 0 24px; }

.panel-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 20px;
  margin: 0 0 20px;
}
.panel-card h2 { margin: 0 0 8px; font-size: 1.15rem; color: var(--navy-deep); }
.panel-card ul { margin: 8px 0 0; padding-left: 1.2rem; }
.panel-card li { margin: 4px 0; }

.page { padding: 24px 0 48px; }
.page h1 { margin: 0 0 10px; color: var(--navy-deep); font-size: clamp(1.5rem, 3vw, 2rem); }
.kicker { color: var(--muted); margin: 0 0 20px; max-width: 40rem; }

@media (max-width: 900px) {
  .howto { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 700px) {
  .steps { grid-template-columns: 1fr; }
  .howto { grid-template-columns: 1fr; }
  .nav a:not(.btn):not(.lang) { display: none; }
}

.pay-row { display: flex; gap: 20px; align-items: flex-start; flex-wrap: wrap; margin: 4px 0 8px; }
.pay-qr {
  width: 280px;
  max-width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}
.pay-info { flex: 1 1 16rem; min-width: 0; }
.pay-info p { margin: 0 0 8px; }
#stripe-form { max-width:560px; }
#stripe-form input:not([type=checkbox]), #stripe-form select { width:100%; min-height:44px; padding:10px 12px; border:1px solid #aab9b0; border-radius:6px; font:inherit; }
#stripe-form button:disabled { opacity:.55; cursor:not-allowed; }
#stripe-form :focus-visible { outline:3px solid #287c57; outline-offset:3px; }
#stripe-status { min-height:28px; overflow-wrap:anywhere; }
#stripe-purchase { border-top:4px solid #287c57; }