:root {
  --ink: #17211f;
  --muted: #5d6b67;
  --line: #dce6e1;
  --paper: #fbfaf6;
  --soft: #f2f7f4;
  --teal: #0f5d5e;
  --teal-dark: #0b3d3e;
  --rose: #ba6a72;
  --gold: #b68a45;
  --white: #fff;
  --shadow: 0 20px 50px rgba(15, 93, 94, .12);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  letter-spacing: 0;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
:focus-visible { outline: 3px solid rgba(182, 138, 69, .75); outline-offset: 3px; }

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--teal-dark);
  color: var(--white);
}
.skip-link:focus { top: 12px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(220, 230, 225, .85);
  background: rgba(251, 250, 246, .94);
  backdrop-filter: blur(14px);
}
.nav {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  color: var(--teal-dark);
}
.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: radial-gradient(circle at 35% 30%, #fff 0 18%, #d9efe8 19% 36%, #0f5d5e 37% 100%);
  box-shadow: inset 0 0 0 1px rgba(15, 93, 94, .18);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 15px;
  color: #33433f;
}
.nav-links a:hover { color: var(--teal); }

.hero {
  position: relative;
  min-height: 690px;
  display: grid;
  align-items: center;
  overflow: hidden;
  background: #dfece7;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(90deg, rgba(251, 250, 246, .98) 0%, rgba(251, 250, 246, .86) 38%, rgba(251, 250, 246, .18) 68%);
}
.hero-media {
  position: absolute;
  inset: 0;
}
.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-inner {
  position: relative;
  z-index: 2;
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 84px 0 120px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  color: var(--rose);
  font-size: 14px;
  font-weight: 800;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--rose);
}
h1, h2, h3 { line-height: 1.2; letter-spacing: 0; }
h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(38px, 6vw, 72px);
  color: var(--teal-dark);
}
.hero-copy {
  max-width: 650px;
  margin: 22px 0 0;
  font-size: 19px;
  color: #33433f;
}
.hero-points {
  display: none;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}
.hero-points li {
  padding: 0;
  border: 0;
  background: transparent;
  border-radius: 0;
  font-size: 14px;
  color: var(--teal-dark);
}
.slack-visit-toggle {
  -webkit-appearance: none;
  appearance: none;
  display: inline;
  margin: 0;
  border: 0;
  border-radius: 0;
  padding: 0;
  background: transparent;
  box-shadow: none;
  color: #d76f12;
  font: inherit;
  font-weight: 850;
  cursor: pointer;
}
.slack-visit-toggle.is-blocked { color: #16823a; }
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}
.btn {
  min-width: 148px;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: 7px;
  padding: 12px 18px;
  font-weight: 800;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-primary { background: var(--teal); color: var(--white); }
.btn-secondary { background: #fae45e; color: #25210c; }
.btn-outline { border: 1px solid var(--line); background: var(--white); color: var(--teal-dark); }

.section {
  padding: 86px 0;
}
.section.alt { background: var(--soft); }
.wrap {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}
.section-head {
  max-width: 760px;
  margin-bottom: 36px;
}
.section-head h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  color: var(--teal-dark);
}
.section-head p {
  margin: 14px 0 0;
  color: var(--muted);
}
.grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}
.card {
  min-height: 100%;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 8px 26px rgba(15, 61, 62, .05);
}
.card h3 {
  margin: 0 0 10px;
  font-size: 20px;
  color: var(--teal-dark);
}
.card p, .card li { color: var(--muted); }
.card p { margin: 0; }
.icon {
  width: 38px;
  height: 38px;
  margin-bottom: 14px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #e7f2ee;
  color: var(--teal);
  font-weight: 900;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.course {
  position: relative;
  overflow: hidden;
  padding: 28px;
  border-radius: 8px;
  background: var(--teal-dark);
  color: var(--white);
}
.course:nth-child(2) { background: #214d48; }
.course:nth-child(3) { background: #6f4b59; }
.course strong {
  display: block;
  font-size: 34px;
  line-height: 1;
}
.course h3 { margin: 16px 0 8px; color: var(--white); }
.price { font-size: 26px; font-weight: 900; color: #ffe6a3; }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: start;
}
.list {
  margin: 0;
  padding-left: 20px;
}
.list li { margin: 7px 0; }
.notice-list {
  counter-reset: notice;
  display: grid;
  gap: 14px;
}
.card.notice {
  counter-increment: notice;
  position: relative;
  padding-left: 80px;
}
.notice::before {
  content: counter(notice);
  position: absolute;
  left: 26px;
  top: 26px;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #f4e9d5;
  color: #7a5624;
  font-weight: 900;
}

.faq {
  display: grid;
  gap: 12px;
}
details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  padding: 18px 20px;
}
summary {
  cursor: pointer;
  font-weight: 850;
  color: var(--teal-dark);
}
details p { color: var(--muted); margin: 12px 0 0; }

.region-hero {
  padding: 80px 0 46px;
  background:
    linear-gradient(135deg, rgba(15, 93, 94, .92), rgba(111, 75, 89, .78)),
    url("images/hero-spa-busan.jpg") center / cover no-repeat;
  color: var(--white);
}
.region-hero[data-tone="gold"] { background-blend-mode: multiply; }
.region-hero[data-tone="rose"] { background-color: #7d5262; }
.region-hero[data-tone="green"] { background-color: #315c45; }
.region-hero[data-tone="blue"] { background-color: #25566a; }
.region-hero h1 { color: var(--white); }
.region-hero p { max-width: 740px; color: rgba(255,255,255,.88); }
.breadcrumbs {
  margin-bottom: 18px;
  font-size: 14px;
  color: rgba(255,255,255,.82);
}
.keyword-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}
.keyword-cloud span {
  border: 1px solid rgba(255,255,255,.28);
  border-radius: 999px;
  padding: 7px 10px;
  font-size: 13px;
  background: rgba(255,255,255,.12);
}

.contact-band {
  padding: 54px 0;
  background: #102d2e;
  color: var(--white);
}
.contact-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.contact-inner h2 { margin: 0; color: var(--white); }
.contact-inner p { margin: 8px 0 0; color: rgba(255,255,255,.75); }

.site-footer {
  padding: 48px 0;
  background: #071f20;
  color: rgba(255,255,255,.76);
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 28px;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
}
.footer-links a { color: rgba(255,255,255,.86); }
.small { font-size: 13px; color: rgba(255,255,255,.62); }
.slack-control-line { margin: 12px 0 0; }

@media (max-width: 900px) {
  .nav { align-items: flex-start; flex-direction: column; padding: 14px 0; }
  .nav-links { width: 100%; overflow-x: auto; padding-bottom: 4px; }
  .hero { min-height: 640px; }
  .hero::before {
    background: linear-gradient(180deg, rgba(251, 250, 246, .98) 0%, rgba(251, 250, 246, .9) 58%, rgba(251, 250, 246, .35) 100%);
  }
  .grid, .course-grid, .two-col, .footer-grid { grid-template-columns: 1fr; }
  .contact-inner { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 520px) {
  .nav { width: min(100% - 24px, 1120px); }
  .hero-inner, .wrap { width: min(100% - 24px, 1120px); }
  .section { padding: 64px 0; }
  .cta-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; max-width: 360px; }
  .btn { min-width: 0; width: 100%; padding: 11px 10px; font-size: 15px; }
  .hero-copy { font-size: 17px; }
  .card, .course { padding: 20px; }
  .card.notice { padding: 20px 20px 20px 68px; }
  .notice::before { left: 20px; top: 20px; }
}