:root {
  --bg: #f7f6f3;
  --bg-elevated: #ffffff;
  --ink: #2c2a26;
  --ink-soft: #5a574f;
  --line: #e4e0d8;
  --accent: #5c6b73;
  --accent-deep: #3f4c53;
  --accent-soft: #dfe6e9;
  --highlight: #8a9a7b;
  --danger: #9b4d3c;
  --ok: #3f6b52;
  --shadow: 0 18px 50px rgba(44, 42, 38, 0.08);
  --radius: 14px;
  --max: 1120px;
  --font-display: "Noto Serif Thai", "Georgia", serif;
  --font-body: "Sarabun", "Helvetica Neue", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, #eef1ef 0%, transparent 55%),
    radial-gradient(900px 420px at 100% 0%, #e8ecee 0%, transparent 50%),
    var(--bg);
  min-height: 100vh;
}

img {
  max-width: 100%;
  display: block;
  height: auto;
}

a {
  color: var(--accent-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--ink);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0 0 0.6em;
}

p { margin: 0 0 1em; }

.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 0.6rem 1rem;
  z-index: 1000;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(247, 246, 243, 0.88);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 8px 24px rgba(44, 42, 38, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.25rem;
  gap: 1rem;
}

.brand {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.15rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.95rem;
  transition: color 0.2s var(--ease);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
}

.nav-cta {
  background: var(--accent);
  color: #fff !important;
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
}

.nav-cta:hover {
  background: var(--accent-deep);
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-elevated);
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 1.1rem;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
  transition: transform 0.25s var(--ease);
}

@media (max-width: 920px) {
  .nav-toggle { display: inline-block; }
  .site-nav {
    position: absolute;
    inset: 100% 1.25rem auto;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    background: var(--bg-elevated);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
  }
  .site-nav.is-open { display: flex; }
  .nav-cta { text-align: center; }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.8rem 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font: inherit;
  font-size: 0.98rem;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-deep);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent-deep);
}

.hero {
  padding: 4.5rem 0 3.5rem;
  overflow: hidden;
}

.hero-split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3rem;
  align-items: end;
}

.hero-kicker {
  display: inline-block;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
  opacity: 0;
  animation: rise 0.8s var(--ease) 0.1s forwards;
}

.hero h1 {
  font-size: clamp(2.2rem, 4.8vw, 3.6rem);
  margin-bottom: 0.8rem;
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.2s forwards;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--ink-soft);
  max-width: 36rem;
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.35s forwards;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.5s forwards;
}

.hero-visual {
  position: relative;
  border-radius: 22px;
  overflow: hidden;
  min-height: 420px;
  box-shadow: var(--shadow);
  opacity: 0;
  animation: fade-scale 1s var(--ease) 0.25s forwards;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 420px;
}

.hero-caption {
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  padding: 0.9rem 1rem;
  background: rgba(247, 246, 243, 0.92);
  border-radius: 12px;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.section {
  padding: 4rem 0;
}

.section-tight { padding: 2.5rem 0; }

.section-head {
  max-width: 40rem;
  margin-bottom: 2.25rem;
}

.section-head p {
  color: var(--ink-soft);
}

.eyebrow {
  font-size: 0.82rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--highlight);
  margin-bottom: 0.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.panel {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem;
}

.feature-block {
  padding: 0;
  border: 0;
  background: transparent;
}

.feature-block h3 {
  font-size: 1.25rem;
  margin-top: 0.8rem;
}

.feature-block p {
  color: var(--ink-soft);
  margin-bottom: 0;
}

.feature-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 10px;
  background: var(--accent-soft);
  display: grid;
  place-items: center;
  color: var(--accent-deep);
  font-family: var(--font-display);
}

.course-card,
.blog-card,
.price-card,
.review-card {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.course-card:hover,
.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.course-card img,
.blog-card img,
.page-hero img,
.article-cover img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.card-body {
  padding: 1.25rem 1.3rem 1.45rem;
}

.card-meta {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-bottom: 0.45rem;
}

.card-body h3 {
  font-size: 1.2rem;
}

.card-body p {
  color: var(--ink-soft);
  margin-bottom: 1rem;
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #fff, #f3f2ee);
}

.proof-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.8rem;
  margin-bottom: 0.2rem;
}

.proof-item span {
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.quote {
  font-size: 1.05rem;
  color: var(--ink);
}

.quote cite {
  display: block;
  margin-top: 1rem;
  font-style: normal;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.page-hero {
  padding: 3.25rem 0 1.5rem;
}

.page-hero h1 {
  font-size: clamp(1.9rem, 3.8vw, 2.8rem);
}

.page-hero .lede {
  color: var(--ink-soft);
  max-width: 40rem;
  font-size: 1.1rem;
}

.page-hero-media {
  margin-top: 2rem;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.breadcrumbs {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-bottom: 1rem;
}

.breadcrumbs a {
  color: var(--ink-soft);
  text-decoration: none;
}

.breadcrumbs a:hover { color: var(--ink); }

.prose {
  max-width: 46rem;
}

.prose h2 {
  margin-top: 2rem;
  font-size: 1.55rem;
}

.prose h3 {
  margin-top: 1.5rem;
  font-size: 1.2rem;
}

.prose ul, .prose ol {
  padding-left: 1.2rem;
}

.prose li { margin-bottom: 0.45rem; }

.price-card {
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
}

.price-card.featured {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.price-card .amount {
  font-family: var(--font-display);
  font-size: 2.2rem;
  margin: 0.4rem 0 0.8rem;
}

.price-card ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
  color: var(--ink-soft);
  flex: 1;
}

.price-card li {
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--line);
}

.price-note {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-top: 1.5rem;
}

.review-card {
  padding: 1.4rem;
}

.stars {
  color: var(--highlight);
  letter-spacing: 0.08em;
  margin-bottom: 0.6rem;
}

.form {
  display: grid;
  gap: 1rem;
  max-width: 36rem;
}

.form-row {
  display: grid;
  gap: 0.4rem;
}

.form label {
  font-weight: 600;
  font-size: 0.95rem;
}

.form input,
.form select,
.form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
  font: inherit;
  background: #fff;
  color: var(--ink);
}

.form textarea { min-height: 140px; resize: vertical; }

.form input:focus,
.form select:focus,
.form textarea:focus {
  outline: 2px solid var(--accent-soft);
  border-color: var(--accent);
}

.field-error {
  color: var(--danger);
  font-size: 0.88rem;
  min-height: 1.1em;
}

.form-status {
  padding: 0.85rem 1rem;
  border-radius: 10px;
  display: none;
}

.form-status.is-success {
  display: block;
  background: #e7f2ea;
  color: var(--ok);
}

.form-status.is-error {
  display: block;
  background: #f7e8e4;
  color: var(--danger);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: start;
}

.faq details {
  border-bottom: 1px solid var(--line);
  padding: 1rem 0;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
}

.faq p {
  color: var(--ink-soft);
  margin: 0.7rem 0 0.2rem;
}

.module-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.module-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.9rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.module-num {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--accent-soft);
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  color: var(--accent-deep);
}

.instructor {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1.25rem;
  align-items: center;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.instructor img {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 50%;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th, td {
  text-align: left;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  background: #f1efea;
  font-weight: 600;
}

.site-footer {
  margin-top: 4rem;
  padding: 3rem 0 1.5rem;
  border-top: 1px solid var(--line);
  background: #f1efea;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  gap: 1.75rem;
}

.footer-col h3 {
  font-size: 1rem;
  margin-bottom: 0.8rem;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col li { margin-bottom: 0.4rem; }

.footer-col a,
.legal-links a {
  color: var(--ink-soft);
  text-decoration: none;
}

.footer-col a:hover,
.legal-links a:hover {
  color: var(--ink);
}

.footer-brand p,
.footer-address {
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.legal-links {
  display: flex;
  gap: 1rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.cookie-banner {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 80;
  max-width: 720px;
  margin-inline: auto;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.15rem 1.25rem;
  display: none;
}

.cookie-banner.is-visible { display: block; }

.cookie-banner p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.cookie-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.inline-error {
  margin: 0.75rem 0;
  padding: 0.7rem 0.9rem;
  background: #f7e8e4;
  color: var(--danger);
  border-radius: 10px;
  display: none;
}

.inline-error.is-visible { display: block; }

.cta-band {
  padding: 2.5rem;
  border-radius: 20px;
  background:
    linear-gradient(135deg, rgba(92, 107, 115, 0.12), rgba(138, 154, 123, 0.18)),
    #fff;
  border: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1.25rem;
}

.cta-band h2 { margin: 0 0 0.35rem; }
.cta-band p { margin: 0; color: var(--ink-soft); }

.case-study {
  padding: 1.6rem;
  border-left: 3px solid var(--accent);
  background: #fff;
  border-radius: 0 var(--radius) var(--radius) 0;
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.muted { color: var(--ink-soft); }

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}

@keyframes fade-scale {
  from { opacity: 0; transform: scale(0.98); }
  to { opacity: 1; transform: none; }
}

@media (max-width: 900px) {
  .hero-split,
  .grid-3,
  .proof-strip,
  .footer-grid,
  .contact-grid,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .instructor {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .instructor img {
    margin-inline: auto;
  }

  .hero-visual,
  .hero-visual img {
    min-height: 280px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  .reveal { opacity: 1; transform: none; }
}