:root {
  --green: #0b5c3f;
  --green-2: #0f7a52;
  --wa: #25d366;
  --wa-dark: #128c7e;
  --ink: #14211c;
  --muted: #5b6b64;
  --bg: #f6f8f7;
  --card: #ffffff;
  --line: #e2e8e4;
  --radius: 16px;
  --wrap: 960px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Noto Sans SC",
    "Noto Sans Thai", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { line-height: 1.2; margin: 0 0 .4em; }
p { margin: 0 0 1em; }
a { color: inherit; }
section { max-width: var(--wrap); margin: 0 auto; padding: 3.2rem 1.25rem; }

/* Header */
.top {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: .75rem; flex-wrap: wrap;
  padding: .6rem 1.25rem;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: .5rem; font-weight: 800; text-decoration: none; font-size: 1.05rem; margin-right: auto; }
.brand .logo { width: 34px; height: 34px; display: block; }
.brand .logo-dark { display: none; }
@media (prefers-color-scheme: dark) {
  .brand .logo-light { display: none; }
  .brand .logo-dark { display: block; }
}
.langs { display: flex; gap: .15rem; flex-wrap: wrap; }
.lang {
  text-decoration: none; font-size: .8rem; font-weight: 600; color: var(--muted);
  padding: .28rem .5rem; border-radius: 8px; line-height: 1;
}
.lang:hover { background: #eef3f0; color: var(--ink); }
.lang.active { background: var(--green); color: #fff; }
.top-cta { padding: .5rem .9rem; font-size: .85rem; }

/* Buttons */
.btn {
  display: inline-block; text-decoration: none; font-weight: 700;
  border-radius: 999px; padding: .8rem 1.4rem; transition: transform .06s ease, filter .15s ease;
  cursor: pointer; border: 2px solid transparent;
}
.btn:hover { filter: brightness(1.03); }
.btn:active { transform: translateY(1px); }
.btn-wa { background: var(--wa); color: #06381f; box-shadow: 0 6px 18px rgba(37,211,102,.35); }
.btn-wa::before { content: "💬 "; }
.btn-lg { font-size: 1.15rem; padding: 1rem 1.8rem; }
.btn-outline { border-color: var(--green); color: var(--green); background: transparent; }
.btn-outline:hover { background: var(--green); color: #fff; }

/* Hero */
.hero {
  text-align: center; padding-top: 3.6rem; padding-bottom: 2.4rem;
  background:
    radial-gradient(1200px 400px at 50% -50px, rgba(15,122,82,.12), transparent),
    var(--bg);
}
.badge {
  display: inline-block; font-size: .8rem; font-weight: 700; letter-spacing: .02em;
  color: var(--green); background: #e4f2ea; padding: .35rem .8rem; border-radius: 999px;
  margin-bottom: 1rem;
}
.hero h1 { font-size: clamp(1.9rem, 5vw, 3rem); }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 620px; margin: 0 auto 1.6rem; }
.hint { color: var(--muted); font-size: .9rem; margin-top: .7rem; }

/* Services */
.services h2, .steps h2, .pay h2, .faq h2 { text-align: center; font-size: 1.7rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-top: 1.6rem; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.4rem; text-align: center;
}
.card .ic { font-size: 2rem; }
.card h3 { margin-top: .4rem; font-size: 1.1rem; }
.card p { color: var(--muted); margin: 0; font-size: .95rem; }

/* Steps */
.steps { background: linear-gradient(180deg, #fff, #f1f6f3); border-radius: var(--radius); }
.steplist { list-style: none; margin: 1.6rem auto 2rem; padding: 0; max-width: 640px; display: grid; gap: 1rem; }
.steplist li { display: flex; gap: 1rem; align-items: flex-start; }
.num {
  flex: none; width: 2.2rem; height: 2.2rem; border-radius: 50%;
  background: var(--green); color: #fff; font-weight: 800;
  display: grid; place-items: center;
}
.steplist h3 { font-size: 1.1rem; margin: .1rem 0 .2rem; }
.steplist p { color: var(--muted); margin: 0; }
.steps .btn { display: block; width: max-content; margin: 0 auto; }

/* Pay */
.pay { text-align: center; }
.pay p { max-width: 640px; margin: 0 auto 1rem; color: var(--muted); }
.pay-icons { font-weight: 700; color: var(--ink); }

/* CTA cards */
.ctas { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.2rem; }
.ctacard {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.6rem; text-align: center;
}
.ctacard h2 { font-size: 1.3rem; }
.ctacard p { color: var(--muted); }

/* FAQ */
.faq details {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: .3rem 1rem; margin-bottom: .6rem; max-width: 720px; margin-left: auto; margin-right: auto;
}
.faq summary { cursor: pointer; font-weight: 700; padding: .7rem 0; }
.faq details p { color: var(--muted); margin: 0 0 .8rem; }

/* AGB */
.agb { text-align: center; }
.agb p { max-width: 680px; margin: 0 auto; color: var(--muted); font-size: .95rem; }

/* Final + footer */
.finalcta { text-align: center; padding-top: 1rem; }
.foot {
  text-align: center; padding: 2rem 1.25rem 3rem; color: var(--muted); font-size: .9rem;
  border-top: 1px solid var(--line);
}
.foot-langs { display: flex; gap: .3rem; justify-content: center; flex-wrap: wrap; margin-top: .6rem; }
.foot-by { margin-top: 1rem; font-size: .78rem; opacity: .6; }
.foot-by a { color: inherit; text-decoration: none; border-bottom: 1px dotted currentColor; }

@media (max-width: 520px) {
  .top-cta { display: none; }
  section { padding: 2.4rem 1.1rem; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8efeb; --muted: #9fb1a9; --bg: #0e1512; --card: #17201c; --line: #26332d;
  }
  .top { background: rgba(14,21,18,.9); }
  .lang:hover { background: #1f2b25; }
  .badge { background: #14271f; }
  .steps { background: linear-gradient(180deg, #17201c, #121a16); }
}