:root {
  --bg: #f7f5f1;
  --bg-elevated: #ffffff;
  --ink: #1e2428;
  --ink-soft: #5a636a;
  --line: #e2ddd4;
  --accent: #5f7358;
  --accent-deep: #3f4d3b;
  --accent-soft: #e8eee4;
  --sand: #d9d0c2;
  --shadow: 0 12px 40px rgba(30, 36, 40, 0.06);
  --radius: 12px;
  --font-display: "Trirong", "Noto Serif Thai", serif;
  --font-body: "Sarabun", "Noto Sans Thai", sans-serif;
  --max: 1120px;
  --header-h: 72px;
}

*,
*::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(ellipse 80% 50% at 10% -10%, #ece8df 0%, transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 0%, #e5ebe1 0%, transparent 45%),
    var(--bg);
  min-height: 100vh;
}

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

a {
  color: var(--accent-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

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

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

p {
  margin: 0 0 1em;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 1000;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(247, 245, 241, 0.88);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(247, 245, 241, 0.96);
}

.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo:hover {
  color: var(--accent-deep);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.15rem 1.1rem;
  flex-wrap: wrap;
}

.site-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.95rem;
  padding: 0.35rem 0;
  transition: color 0.2s ease;
}

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

.nav-cta {
  background: var(--ink);
  color: #f7f5f1 !important;
  padding: 0.45rem 0.95rem !important;
  border-radius: 999px;
  transition: background 0.2s ease, transform 0.2s ease;
}

.nav-cta:hover {
  background: var(--accent-deep);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  border-radius: 8px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

main {
  min-height: 50vh;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  padding: 4.5rem 0;
}

.section-tight {
  padding: 3rem 0;
}

.eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
  font-family: var(--font-body);
  font-weight: 600;
}

.lead {
  font-size: 1.15rem;
  color: var(--ink-soft);
  max-width: 38rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 0.98rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

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

.btn-primary {
  background: var(--ink);
  color: #f7f5f1;
}

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

.btn-soft {
  background: var(--accent-soft);
  color: var(--accent-deep);
}

.btn-soft:hover {
  background: #dce5d7;
  color: var(--accent-deep);
}

/* Hero — brand-led full-bleed composition */
.hero-home {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: grid;
  align-items: end;
  overflow: hidden;
}

.hero-home__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-home__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: slow-zoom 18s ease-in-out infinite alternate;
}

.hero-home__veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(30, 36, 40, 0.25) 0%, rgba(30, 36, 40, 0.55) 45%, rgba(30, 36, 40, 0.82) 100%);
}

.hero-home__content {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  width: 100%;
  margin: 0 auto;
  padding: 4rem 1.25rem 3.5rem;
  color: #f7f5f1;
  animation: rise-in 0.9s ease both;
}

.hero-home__brand {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 5.2rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  margin: 0 0 0.4rem;
  line-height: 1.05;
  color: #f7f5f1;
}

.hero-home__line {
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  max-width: 28rem;
  margin: 0 0 1.75rem;
  color: rgba(247, 245, 241, 0.88);
  font-weight: 400;
}

.hero-home .btn-primary {
  background: #f7f5f1;
  color: var(--ink);
}

.hero-home .btn-primary:hover {
  background: #fff;
  color: var(--ink);
}

@keyframes slow-zoom {
  from { transform: scale(1); }
  to { transform: scale(1.06); }
}

@keyframes rise-in {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.proof-bar {
  background: var(--bg-elevated);
  border-block: 1px solid var(--line);
  padding: 1.75rem 0;
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  text-align: center;
}

.proof-grid strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 600;
  color: var(--ink);
}

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

.feature-course {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.5rem;
  align-items: center;
}

.feature-course__img {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.feature-course__img img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.benefit-list {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}

.benefit-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.benefit-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.benefit-num {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--accent);
  min-width: 2rem;
}

.split-quote {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.quote-block {
  padding: 1.75rem 0;
}

.quote-block blockquote {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  line-height: 1.45;
  font-weight: 500;
}

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

.quote-block.muted blockquote {
  font-size: 1.05rem;
  font-family: var(--font-body);
  color: var(--ink-soft);
}

.page-hero {
  padding: 3.5rem 0 2rem;
}

.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  max-width: 18ch;
}

.page-hero.wide h1 {
  max-width: 22ch;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.75rem;
}

.course-card,
.blog-card {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
}

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

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

.course-card__body,
.blog-card__body {
  padding: 1.25rem 1.35rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.course-card h3,
.blog-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.4rem;
}

.course-card p,
.blog-card p {
  color: var(--ink-soft);
  font-size: 0.95rem;
  flex: 1;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  color: var(--ink-soft);
  font-size: 0.88rem;
  margin-top: 0.75rem;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  align-items: stretch;
  margin-top: 2rem;
}

.price-tier {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
}

.price-tier.featured {
  border-color: var(--accent);
  background: linear-gradient(180deg, var(--accent-soft) 0%, var(--bg-elevated) 40%);
}

.price-tier h3 {
  font-size: 1.35rem;
  margin-bottom: 0.35rem;
}

.price-amount {
  font-family: var(--font-display);
  font-size: 2rem;
  margin: 0.75rem 0;
}

.price-amount span {
  font-size: 0.95rem;
  font-family: var(--font-body);
  color: var(--ink-soft);
}

.price-tier ul {
  margin: 0 0 1.5rem;
  padding-left: 1.1rem;
  color: var(--ink-soft);
  flex: 1;
}

.price-tier li {
  margin-bottom: 0.45rem;
}

.price-note {
  font-size: 0.88rem;
  color: var(--ink-soft);
  margin-top: 1.5rem;
}

.prose {
  max-width: 42rem;
}

.prose h2 {
  margin-top: 2.25rem;
  font-size: 1.55rem;
}

.prose h3 {
  margin-top: 1.75rem;
  font-size: 1.2rem;
}

.prose ul, .prose ol {
  padding-left: 1.25rem;
  color: var(--ink-soft);
}

.prose li {
  margin-bottom: 0.4rem;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin: 1.25rem 0;
}

.prose th,
.prose td {
  border: 1px solid var(--line);
  padding: 0.65rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: var(--accent-soft);
}

.module-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
}

.module-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 0.75rem;
}

.module-list strong {
  color: var(--accent);
  font-family: var(--font-display);
}

.instructor {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1.25rem;
  align-items: center;
  margin: 2rem 0;
  padding: 1.25rem;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

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

.faq summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq details[open] summary {
  color: var(--accent-deep);
}

.faq details p {
  margin: 0.75rem 0 0;
  color: var(--ink-soft);
}

.review-stack {
  display: grid;
  gap: 1.5rem;
}

.review-item {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--line);
}

.review-item:last-child {
  border-bottom: 0;
}

.stars {
  color: var(--accent);
  letter-spacing: 0.08em;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.case-study {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem;
  margin: 1.5rem 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.contact-card {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.contact-card p {
  color: var(--ink-soft);
}

.form-group {
  margin-bottom: 1.15rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
  font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 1rem;
  background: #fff;
  color: var(--ink);
}

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

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

.field-error {
  color: #9b3b3b;
  font-size: 0.88rem;
  margin-top: 0.35rem;
  display: none;
}

.form-group.has-error .field-error {
  display: block;
}

.form-group.has-error input,
.form-group.has-error select,
.form-group.has-error textarea {
  border-color: #c46a6a;
}

.form-status {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: 8px;
  display: none;
}

.form-status.is-success {
  display: block;
  background: var(--accent-soft);
  color: var(--accent-deep);
}

.form-status.is-error {
  display: block;
  background: #f6e8e8;
  color: #7a3030;
}

.inline-error {
  margin: 1rem 0;
  padding: 0.75rem 1rem;
  background: #f6e8e8;
  color: #7a3030;
  border-radius: 8px;
  display: none;
}

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

.site-footer {
  margin-top: 4rem;
  background: var(--ink);
  color: rgba(247, 245, 241, 0.78);
  padding: 3.5rem 0 2rem;
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: #f7f5f1;
  margin: 0 0 0.5rem;
}

.footer-tag {
  max-width: 28rem;
  font-size: 0.95rem;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin: 2.5rem 0 2rem;
}

.footer-heading {
  color: #f7f5f1;
  font-weight: 600;
  margin: 0 0 0.75rem;
  font-size: 0.92rem;
}

.footer-cols a {
  display: block;
  color: rgba(247, 245, 241, 0.72);
  text-decoration: none;
  margin-bottom: 0.45rem;
  font-size: 0.92rem;
}

.footer-cols a:hover {
  color: #fff;
}

.footer-meta {
  font-size: 0.88rem;
  margin-bottom: 0.55rem;
  line-height: 1.55;
}

.footer-meta a {
  color: rgba(247, 245, 241, 0.85);
}

.footer-copy {
  border-top: 1px solid rgba(247, 245, 241, 0.12);
  padding-top: 1.25rem;
  font-size: 0.85rem;
  margin: 0;
}

.cookie-banner {
  position: fixed;
  bottom: 1rem;
  left: 1rem;
  right: 1rem;
  max-width: 520px;
  margin: 0 auto;
  z-index: 200;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.35rem;
  animation: rise-in 0.4s ease both;
}

.cookie-banner p {
  margin: 0 0 1rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.cookie-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.error-page {
  text-align: center;
  padding: 6rem 1.25rem;
}

.error-page h1 {
  font-size: 4rem;
  margin-bottom: 0.25rem;
}

.article-hero img {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
  border-radius: var(--radius);
  margin: 1.5rem 0 2rem;
}

.cta-band {
  background: linear-gradient(135deg, var(--accent-soft), #f0ebe3);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  text-align: center;
  margin: 2rem 0;
}

.cta-band h2 {
  margin-bottom: 0.5rem;
}

.media-bleed {
  width: 100%;
  aspect-ratio: 21/8;
  object-fit: cover;
  border-radius: var(--radius);
  margin: 1.5rem 0;
}

@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.25rem 1.25rem;
    gap: 0;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 0.7rem 0;
    border-bottom: 1px solid var(--line);
  }

  .nav-cta {
    margin-top: 0.75rem;
    text-align: center;
    border-bottom: 0 !important;
  }

  .feature-course,
  .split-quote,
  .contact-grid,
  .pricing-grid,
  .footer-cols,
  .proof-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-home {
    min-height: 78vh;
  }
}