:root {
  --ink: #1a2740; --muted: #5c6d88; --bg: #f3f7fc; --bg-soft: #e7eff8; --white: #fff;
  --line: rgba(26,39,64,0.12); --accent: #e85d4c; --accent-deep: #c94738; --accent-bar: #5b9fd4;
  --sky: #2f6fad; --on-accent: #fff; --font: 'Anuphan', sans-serif; --heading: 'Kanit', 'Anuphan', sans-serif;
  --brand: 'Syne', 'Anuphan', sans-serif; --mono: 'IBM Plex Mono', 'Anuphan', monospace;
  --max: 1120px; --demo-h: 48px; --header-h: 72px; --ease: cubic-bezier(0.22, 1, 0.36, 1); --radius: 6px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 120px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}
body { font-family: var(--font); color: var(--ink); background: radial-gradient(ellipse 55% 40% at 0% 0%, rgba(91,159,212,.14), transparent 50%), var(--bg); line-height: 1.65; overflow-x: hidden; font-synthesis: none; }
img { max-width: 100%; display: block; } a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; font-size: 16px; } ul, ol { list-style: none; }
.wrap { width: min(100% - 2.5rem, var(--max)); margin-inline: auto; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.demo-bar { position: sticky; top: 0; z-index: 60; display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; padding: .55rem 1.25rem; background: #111; color: #fff; font-size: .82rem; }
.demo-bar strong { font-family: var(--mono); font-size: .68rem; letter-spacing: .06em; color: var(--accent-bar); font-weight: 500; }
.demo-bar__actions { display: flex; gap: .45rem; flex-wrap: wrap; }
.demo-bar a { padding: .35rem .7rem; border: 1px solid rgba(255,255,255,.25); border-radius: var(--radius); font-size: .78rem; font-weight: 500; }
.demo-bar a.is-primary { background: var(--accent); border-color: var(--accent); color: #fff; }

.site-header { position: sticky; top: var(--demo-h); z-index: 50; background: rgba(243,247,252,.94); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.site-header__inner { display: flex; align-items: center; justify-content: space-between; min-height: var(--header-h); position: relative; }
.brand { font-family: var(--heading); font-weight: 700; font-size: 1.35rem; display: inline-flex; align-items: baseline; gap: .45rem; }
.brand small { font-family: var(--brand); font-size: .65rem; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); font-weight: 600; }
.menu-toggle { display: none; background: none; border: 1px solid var(--line); padding: .45rem .8rem; cursor: pointer; border-radius: var(--radius); color: var(--ink); }
.nav { display: flex; align-items: center; gap: 1.15rem; }
.nav a { font-size: .92rem; font-weight: 500; color: var(--muted); }
.nav-cta { background: var(--accent); color: #fff !important; padding: .55rem 1.05rem; border-radius: var(--radius); }

.btn { display: inline-flex; align-items: center; justify-content: center; padding: .9rem 1.4rem; font-weight: 600; border-radius: var(--radius); border: 1.5px solid transparent; cursor: pointer; transition: transform .2s var(--ease); }
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--accent); color: #fff; }
.btn--ghost { color: #fff; border-color: rgba(255,255,255,.45); background: transparent; }
.btn--block { width: 100%; }
.btn-row { display: flex; flex-wrap: wrap; gap: .75rem; }

.hero { position: relative; min-height: min(88dvh, 780px); display: flex; align-items: flex-end; color: #fff; overflow: hidden; }
.hero__media { position: absolute; inset: 0; }
.hero__media img { width: 100%; height: 100%; object-fit: cover; animation: ken 20s var(--ease) both; }
.hero__media::after { content: ''; position: absolute; inset: 0; background: linear-gradient(115deg, rgba(20,35,58,.9) 0%, rgba(20,35,58,.52) 55%, rgba(20,35,58,.22) 100%); }
.hero__inner { position: relative; z-index: 1; padding: 5rem 0 3.25rem; max-width: 38rem; margin-left: max(calc((100% - var(--max)) / 2), 1.25rem); width: min(100% - 2.5rem, 38rem); animation: rise .9s var(--ease) both; }
.hero__brand { font-family: var(--heading); font-size: 1.2rem; font-weight: 700; margin-bottom: 1rem; display: flex; gap: .5rem; align-items: baseline; }
.hero__brand span { font-family: var(--brand); font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent-bar); }
.hero h1 { font-family: var(--heading); font-size: clamp(2.1rem, 5vw, 3.2rem); line-height: 1.18; letter-spacing: -.02em; margin-bottom: .9rem; }
.hero h1 em { display: block; font-style: normal; color: #ffb4a8; font-size: .72em; margin-top: .25rem; }
.hero__lead { color: rgba(255,255,255,.86); margin-bottom: 1.5rem; }
@keyframes ken { from { transform: scale(1.05); } to { transform: scale(1); } }
@keyframes rise { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: none; } }

.strip { background: var(--ink); color: #fff; }
.strip__inner { display: flex; flex-wrap: wrap; gap: .75rem 1.75rem; padding: .95rem 0; font-family: var(--mono); font-size: .78rem; letter-spacing: .04em; }
.strip__inner span { position: relative; }
.strip__inner span:not(:last-child)::after { content: ''; }

.section { padding: 4.5rem 0; }
.section--soft { background: var(--bg-soft); }
.section--accent { background: #1a2740; color: #fff; }
.section__head { margin-bottom: 2rem; max-width: 40rem; }
.section__head h2 { font-family: var(--heading); font-size: clamp(1.75rem, 3.2vw, 2.4rem); letter-spacing: -.02em; line-height: 1.22; margin-bottom: .5rem; }
.section__head p { color: var(--muted); }
.eyebrow { font-family: var(--mono); font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); margin-bottom: .5rem; }
.eyebrow.light { color: #ffb4a8; }
.tag { font-family: var(--mono); font-size: .65rem; letter-spacing: .08em; text-transform: uppercase; color: var(--sky); font-weight: 500; }

/* BOARD — unique to B: intro left + vertical rail right */
.board { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 3rem; align-items: start; }
.board__intro h2 { font-family: var(--heading); font-size: clamp(1.9rem, 3.5vw, 2.7rem); line-height: 1.18; letter-spacing: -.02em; margin: .4rem 0 1rem; }
.board__intro p { color: var(--muted); margin-bottom: 1.5rem; max-width: 28rem; }
.board__rail { position: relative; display: grid; gap: 0; border-left: 3px solid var(--accent-bar); padding-left: 0; }
.board__rail li { display: grid; grid-template-columns: 5.5rem 1fr; gap: 1rem; padding: 1.15rem 0 1.15rem 1.5rem; border-bottom: 1px dashed var(--line); position: relative; background: var(--white); margin-left: 0; }
.board__rail li::before { content: ''; position: absolute; left: -7px; top: 1.45rem; width: 11px; height: 11px; border-radius: 50%; background: var(--accent); border: 2px solid var(--bg); }
.board__rail .t { font-family: var(--mono); font-size: .85rem; font-weight: 500; color: var(--sky); font-variant-numeric: tabular-nums; padding-top: .15rem; }
.board__rail h3 { font-family: var(--heading); font-size: 1.15rem; margin-bottom: .25rem; }
.board__rail p { color: var(--muted); font-size: .92rem; }
.board__rail .is-end { border-bottom: none; }
.board__rail .is-end::before { background: var(--sky); }

/* PROGRAM LIST ROWS — unique to B */
.plist { display: grid; gap: .75rem; }
.plist__row { display: grid; grid-template-columns: 88px 1fr auto; gap: 1.15rem; align-items: center; background: var(--white); border: 1.5px solid var(--line); padding: .85rem 1.1rem; border-radius: var(--radius); transition: border-color .2s, transform .2s var(--ease); }
.plist__row:hover { border-color: var(--accent); transform: translateX(4px); }
.plist__row img { width: 88px; height: 72px; object-fit: cover; border-radius: 4px; }
.plist__main h3 { font-family: var(--heading); font-size: 1.25rem; margin: .15rem 0 .25rem; }
.plist__main p { color: var(--muted); font-size: .9rem; }
.plist__side { text-align: right; display: grid; gap: .1rem; justify-items: end; min-width: 7rem; }
.plist__side strong { font-family: var(--heading); font-size: 1.45rem; color: var(--accent-deep); font-variant-numeric: tabular-nums; }
.plist__side span { font-size: .8rem; color: var(--muted); }
.plist__side em { font-style: normal; font-weight: 600; color: var(--accent); font-size: .9rem; margin-top: .35rem; }

/* Horizontal teacher scroll — unique emphasis in B */
.team-scroll { display: flex; gap: 1rem; overflow-x: auto; padding-bottom: .5rem; scroll-snap-type: x mandatory; }
.tcard { flex: 0 0 260px; scroll-snap-align: start; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.tcard img { width: 100%; aspect-ratio: 5/4; object-fit: cover; }
.tcard h3 { font-family: var(--heading); font-size: 1.15rem; padding: 1rem 1rem 0; }
.tcard p { padding: .35rem 1rem 1.15rem; color: var(--muted); font-size: .9rem; }
.tcard--quote { background: var(--ink); color: #fff; border-color: var(--ink); display: flex; flex-direction: column; justify-content: center; padding: 1.5rem; }
.tcard--quote p { font-family: var(--heading); font-size: 1.15rem; line-height: 1.4; color: #fff; padding: 0; margin-bottom: 1rem; }
.tcard--quote footer { color: rgba(255,255,255,.65); font-size: .85rem; }

.faq-b { display: grid; grid-template-columns: .7fr 1.3fr; gap: 2.5rem; align-items: start; }
.faq-b h2 { font-family: var(--heading); font-size: clamp(1.7rem, 3vw, 2.2rem); }
.faq-list { display: grid; gap: .5rem; }
.faq-list details { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); }
.faq-list summary { cursor: pointer; list-style: none; padding: 1rem 1.15rem; font-weight: 600; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list details p { padding: 0 1.15rem 1rem; color: var(--muted); font-size: .95rem; }


.contact-b { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; }
.contact-b h2 { font-family: var(--heading); font-size: clamp(1.8rem, 3vw, 2.4rem); color: #fff; margin: .4rem 0 .7rem; }
.ticks { display: grid; gap: .65rem; margin-top: 1.25rem; }
.ticks li { padding-left: 1.3rem; position: relative; font-weight: 500; }
.ticks li::before { content: ''; position: absolute; left: 0; top: .55rem; width: .5rem; height: .5rem; background: var(--accent); }
.ticks.light li { color: rgba(255,255,255,.85); }
.ticks.light li::before { background: #ffb4a8; }
.form { background: #fff; color: var(--ink); padding: 1.6rem; border-radius: var(--radius); display: grid; gap: .9rem; }
.field { display: grid; gap: .3rem; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }
.field label { font-size: .85rem; font-weight: 500; color: var(--muted); }
.field input, .field select, .field textarea { padding: .75rem .9rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg); }

.site-footer { background: #10182a; color: rgba(255,255,255,.75); padding: 1.75rem 0; }
.footer-b { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
.site-footer .brand { color: #fff; }

.reveal { opacity: 0; transform: translateY(16px); transition: opacity .65s var(--ease), transform .65s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

.voice-path {
  list-style: none;
  margin: 0 auto;
  max-width: 42rem;
  width: 100%;
  padding: 0;
  display: grid;
  gap: 0;
  position: relative;
}
#voices .section__head,
#voices header.section__head {
  max-width: 42rem;
  width: 100%;
  margin-inline: auto;
}

.voice-path::before {
  content: "";
  position: absolute;
  left: 0.85rem;
  top: 0.45rem;
  bottom: 0.45rem;
  width: 1px;
  background: var(--line);
}
.voice-path__step {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: 0.85rem 1.25rem;
  align-items: start;
  padding: 1.15rem 0;
  position: relative;
}
.voice-path__mark {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--accent);
  padding-top: 0.2rem;
  background: var(--bg, transparent);
  position: relative;
  z-index: 1;
}
.voice-path__step p {
  font-family: var(--heading);
  font-size: 1.15rem;
  line-height: 1.4;
  margin: 0 0 0.55rem;
}
.voice-path__step cite {
  display: block;
  font-style: normal;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 900px) {
  .voice-path::before { left: 0.7rem; }
  .voice-path__step { grid-template-columns: 2rem minmax(0, 1fr); gap: 0.65rem 1rem; }

  .board, .faq-b, .contact-b,   .plist__row { grid-template-columns: 72px 1fr; }
  .plist__side { grid-column: 2; text-align: left; justify-items: start; flex-direction: row; display: flex; align-items: baseline; gap: .5rem; }
  .field-row { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .menu-toggle { display: block; }
  .nav { display: none; position: absolute; left: 0; right: 0; top: 100%; flex-direction: column; background: var(--bg); border-bottom: 1px solid var(--line); padding: .75rem 1.25rem 1rem; }
  .nav.is-open { display: flex; }
  .nav a { padding: .7rem 0; border-bottom: 1px solid var(--line); }
  .board__rail li { grid-template-columns: 4.5rem 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  .hero__media img, .hero__inner { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
}