/* ให้ Kru ช่วย — หน้ารวมคอร์สเรียน (catalog)
   โทน: ครีม–ปะการัง–ถ่าน ตามแบรนด์หลัก */

:root{
  --paper:#FAF7F0;
  --card:#FFFFFF;
  --ink:#2B2B2B;
  --muted:#6E6A62;
  --coral:#E0524A;
  --coral-dark:#C9472A;
  --coral-soft:#FCE9E4;
  --green:#315E49;
  --green-soft:#E7EFE3;
  --yellow:#FFE76A;
  --line:#EAE3D5;
  --shadow:0 1px 2px rgba(43,43,43,.04), 0 12px 28px rgba(43,43,43,.05);
  --font:"Noto Sans Thai","Sarabun","Thonburi",system-ui,-apple-system,sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font:16px/1.7 var(--font);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%}
a{color:inherit}
.wrap{max-width:1120px;margin:0 auto;padding-inline:24px}

/* ---------- header ---------- */
.site-head{
  position:sticky;top:0;z-index:40;
  background:rgba(250,247,240,.92);
  backdrop-filter:saturate(150%) blur(10px);
  border-bottom:1px solid var(--line);
}
.head-in{display:flex;align-items:center;gap:28px;min-height:68px}
.logo{
  font:800 21px/1 var(--font);color:var(--ink);text-decoration:none;
  letter-spacing:-.01em;white-space:nowrap;
}
.nav{display:flex;gap:4px;margin-left:4px}
.nav a{
  text-decoration:none;color:var(--muted);font-weight:600;font-size:15.5px;
  padding:9px 14px;border-radius:999px;white-space:nowrap;
}
.nav a:hover{color:var(--ink);background:rgba(43,43,43,.045)}
.nav a.active{color:var(--ink);background:#fff;border:1px solid var(--line)}
.head-cta{
  margin-left:auto;text-decoration:none;
  background:var(--coral);color:#fff;font-weight:700;font-size:15px;
  padding:11px 20px;border-radius:999px;white-space:nowrap;
  transition:background .2s ease, transform .2s ease;
}
.head-cta:hover{background:var(--coral-dark);transform:translateY(-1px)}

/* ---------- page head ---------- */
.page-head{padding:52px 0 10px;text-align:center}
.eyebrow{
  margin:0 0 6px;font-size:13.5px;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--coral);
}
.page-head h1{
  margin:0 0 12px;font-size:clamp(34px,5vw,46px);font-weight:800;
  line-height:1.15;letter-spacing:-.02em;
}
.sub{
  margin:0 auto;max-width:56ch;color:var(--muted);font-size:17px;line-height:1.75;
}

/* ---------- filters ---------- */
.filters{
  display:flex;gap:10px;justify-content:center;flex-wrap:wrap;
  padding:28px 0 6px;
}
.chip{
  font:600 15px var(--font);color:var(--ink);
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:9px 18px;cursor:pointer;transition:all .18s ease;
}
.chip:hover{border-color:#D6CCB8}
.chip.on{background:var(--green);border-color:var(--green);color:#fff}
.chip:focus-visible{outline:3px solid var(--coral-soft);outline-offset:2px}

/* ---------- section ---------- */
.course-section{padding:26px 0 4px}
.sec-head{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  margin-bottom:18px;
}
.sec-head h2{margin:0;font-size:23px;font-weight:800;letter-spacing:-.01em}
.see-all{
  color:var(--muted);font-weight:600;font-size:14px;white-space:nowrap;
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 14px;
}

/* ---------- grid + card ---------- */
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;
  background:var(--card);border:1px solid var(--line);border-radius:20px;
  overflow:hidden;box-shadow:var(--shadow);
  transition:transform .22s ease, box-shadow .22s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:0 2px 4px rgba(43,43,43,.05),0 22px 46px rgba(43,43,43,.10)}
.card[hidden]{display:none}

/* cover */
.cover{position:relative;aspect-ratio:16/10;overflow:hidden}
.tag{
  position:absolute;top:14px;left:14px;z-index:3;
  background:rgba(255,255,255,.94);color:var(--ink);
  font:700 12.5px/1 var(--font);letter-spacing:.01em;
  padding:8px 13px;border-radius:999px;box-shadow:0 1px 3px rgba(43,43,43,.12);
}
.tag-green{color:var(--green)}

/* cover: ระบบติว (สมุดโน้ต) */
.cover-exam{background:linear-gradient(180deg,#FFFCF0 0%,#FFF6DC 100%)}
.cover-exam::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(to bottom,transparent 0 26px,rgba(120,170,220,.30) 26px 27px);
  background-position:0 10px;
}
.cover-exam::after{
  content:"";position:absolute;left:38px;top:0;bottom:0;width:2px;
  background:rgba(224,82,74,.55);
}
.cover-char{
  position:absolute;left:54px;bottom:-6px;height:86%;width:auto;
  filter:drop-shadow(0 10px 16px rgba(43,43,43,.14));
}
.cover-copy{
  position:absolute;right:22px;top:50%;transform:translateY(-50%);
  text-align:right;z-index:2;
}
.cover-copy b{
  display:block;font:700 25px/1.35 "Mali",var(--font);color:#2E2E33;
  letter-spacing:.005em;
}
.cover-copy mark{background:var(--yellow);color:inherit;padding:0 3px;border-radius:4px}
.cover-copy span{
  display:inline-block;margin-top:6px;font:700 13px var(--font);color:#7A6A57;
  background:rgba(255,255,255,.7);padding:3px 10px;border-radius:999px;
}

/* cover: อีบุ๊ก */
.cover-ebook{background:linear-gradient(135deg,#E9F0E4 0%,#F7F2E5 62%,#FBF6EA 100%)}
.cover-ebook::after{
  content:"";position:absolute;right:-40px;top:-40px;width:200px;height:200px;
  border-radius:50%;background:rgba(49,94,73,.07);
}
.cover-book{
  position:absolute;right:10%;top:50%;
  height:84%;width:auto;max-width:40%;transform:translateY(-50%) rotate(-3deg);
  border-radius:5px;box-shadow:0 16px 30px rgba(49,94,73,.30), 0 2px 6px rgba(49,94,73,.2);
}
.cover-copy-green{text-align:left;left:26px;right:auto;max-width:52%}
.cover-copy-green b{font-size:21px;line-height:1.4;color:var(--green)}
.cover-copy-green span{background:rgba(49,94,73,.1);color:var(--green);font-weight:700}

/* body */
.card-body{display:flex;flex-direction:column;gap:12px;padding:20px 22px 22px;flex:1}
.card-body h3{margin:0;font-size:20.5px;font-weight:800;line-height:1.4;letter-spacing:-.005em}
.card-body p{margin:0;color:var(--muted);font-size:15px;line-height:1.7}
.feats{
  list-style:none;margin:2px 0 0;padding:0;
  display:flex;flex-direction:column;gap:7px;
}
.feats li{position:relative;padding-left:26px;font-size:14.5px;color:#4A4741}
.feats li::before{
  content:"✓";position:absolute;left:0;top:0;
  width:18px;height:18px;border-radius:50%;
  background:var(--coral-soft);color:var(--coral-dark);
  font-size:11.5px;font-weight:800;line-height:18px;text-align:center;
}
.price-row{display:flex;align-items:baseline;gap:10px;margin-top:auto;padding-top:4px}
.price{font-size:15px;color:var(--muted);font-weight:600}
.price b{font-size:30px;font-weight:800;color:var(--coral);letter-spacing:-.02em;margin-right:2px}
.price-note{
  font-size:12.5px;font-weight:600;color:var(--green);
  background:var(--green-soft);padding:3px 10px;border-radius:999px;
}
.card-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:46px;padding:0 16px;border-radius:12px;
  font:700 15px var(--font);text-decoration:none;text-align:center;
  transition:all .18s ease;white-space:nowrap;
}
.btn-outline{border:1.5px solid #DCD3C2;color:var(--ink);background:#fff}
.btn-outline:hover{border-color:var(--coral);color:var(--coral-dark)}
.btn-fill{background:var(--coral);color:#fff}
.btn-fill:hover{background:var(--coral-dark);transform:translateY(-1px)}
.btn:focus-visible{outline:3px solid var(--coral-soft);outline-offset:2px}

.empty{padding:40px 0;text-align:center;color:var(--muted)}


/* ---------- proof (ผลตอบรับจริงจาก Facebook) ---------- */
.proof{padding:44px 0 8px}
.proof-title{margin:0 0 8px;font-size:23px;font-weight:800;letter-spacing:-.01em;text-align:center}
.proof-lead{margin:0 auto 22px;color:var(--muted);font-size:16px;max-width:56ch;text-align:center}
.proof-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;max-width:700px;margin:0 auto}
.proof-card{
  display:flex;flex-direction:column;text-decoration:none;color:inherit;
  background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;
  box-shadow:var(--shadow);transition:transform .22s ease, box-shadow .22s ease;
}
.proof-card:hover{transform:translateY(-4px);box-shadow:0 2px 4px rgba(43,43,43,.05),0 22px 46px rgba(43,43,43,.10)}
.proof-card img{display:block;width:100%;height:auto;border-bottom:1px solid var(--line)}
.proof-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 16px;flex-wrap:wrap;margin-top:auto}
.proof-meta b{font-size:14.5px;font-weight:800}
.proof-meta span{font-size:12.5px;font-weight:700;color:var(--coral-dark);white-space:nowrap}
.proof-note{color:#8B8578;font-size:13px;margin-top:12px;text-align:center}

/* ---------- why ---------- */
.why{padding:64px 0 8px}
.why-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:6px}
.why-item{
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px 22px 20px;
  box-shadow:var(--shadow);
}
.why-ico{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:50%;
  background:var(--coral-soft);color:var(--coral-dark);
  font-size:16px;font-weight:800;margin-bottom:12px;
}
.why-item h4{margin:0 0 6px;font-size:16.5px;font-weight:800}
.why-item p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.7}

/* ---------- contact ---------- */
.contact{padding:56px 0 72px}
.contact-in{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  background:linear-gradient(120deg,#FFFDF6 0%,#F7F1E2 100%);
  border:1px solid var(--line);border-radius:22px;padding:30px 34px;
}
.contact-in h2{margin:0 0 6px;font-size:24px;font-weight:800;letter-spacing:-.01em}
.contact-in p{margin:0;color:var(--muted);font-size:15.5px}
.contact-actions{display:flex;gap:10px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-foot{border-top:1px solid var(--line);background:#fff}
.foot-in{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;padding:32px 24px 12px}
.foot-brand b{font-size:18px;font-weight:800;letter-spacing:-.01em}
.foot-brand p{margin:4px 0 0;color:var(--muted);font-size:14.5px}
.foot-links{display:flex;gap:22px;flex-wrap:wrap;align-items:center}
.foot-links a{color:var(--muted);font-size:14.5px;text-decoration:none;font-weight:600}
.foot-links a:hover{color:var(--coral)}
.copy{padding:6px 24px 30px;color:#8B8578;font-size:13.5px}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .head-in{gap:10px}
  .nav{display:none}
  .head-cta{font-size:14px;padding:10px 16px}
  .grid{grid-template-columns:1fr;gap:20px}
  .why-grid{grid-template-columns:1fr;gap:14px}
  .proof-grid{grid-template-columns:1fr;gap:18px}
  .page-head{padding-top:38px}
  .cover{aspect-ratio:16/10}
}
@media (max-width:560px){
  .wrap{padding-inline:18px}
  .card-actions{grid-template-columns:1fr}
  .contact-in{padding:24px 22px}
  .contact-actions{width:100%}
  .contact-actions .btn{flex:1}
  .cover{aspect-ratio:4/3}
  .cover-copy{top:auto;bottom:14px;right:14px;transform:none}
  .cover-copy b{display:none}
  .cover-copy span{margin-top:0;background:rgba(255,255,255,.88);font-size:12.5px;padding:5px 11px}
  .cover-char{left:26px;right:auto;height:84%}
  .cover-copy-green{left:16px;right:auto;bottom:14px}
  .cover-book{right:7%;height:86%;max-width:46%}
}