:root {
  --ink: #102a43;
  --ink-deep: #091f32;
  --blue: #176b87;
  --cyan: #20b8be;
  --cyan-dark: #0f858d;
  --amber: #f0b429;
  --lime: #dff957;
  --paper: #f6f9fb;
  --mist: #eaf3f4;
  --white: #ffffff;
  --line: #d7e2e8;
  --line-dark: #2b4656;
  --muted: #5c7080;
  --muted-light: #a9bec7;
  --green: #2e8b72;
  --container: 1220px;
  --header-height: 78px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Pretendard, "Noto Sans KR", Arial, sans-serif;
  font-size: 16px;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}

body.menu-open { overflow: hidden; }

button,
input,
select,
textarea { font: inherit; letter-spacing: 0; }

button,
a { -webkit-tap-highlight-color: transparent; }

a { color: inherit; }

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

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 12px 16px;
  color: var(--white);
  background: var(--ink);
  transform: translateY(-150%);
}

.skip-link:focus { transform: translateY(0); }

.container {
  width: min(var(--container), calc(100% - 56px));
  margin-inline: auto;
}

.section { padding: 110px 0; }

.section-kicker,
.eyebrow {
  margin: 0;
  color: var(--cyan-dark);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.4;
}

.section-intro h2,
.faculty-statement h2,
.route-intro h2,
.support-head h2,
.faq-intro h2,
.inquiry-copy h2 {
  margin: 14px 0 0;
  font-size: 44px;
  font-weight: 780;
  line-height: 1.26;
  letter-spacing: 0;
}

.icon {
  display: inline-grid;
  width: 22px;
  height: 22px;
  flex: 0 0 22px;
  place-items: center;
  line-height: 0;
}

.icon > i,
.icon > svg {
  display: block;
  width: 20px;
  height: 20px;
  margin: 0;
}

.button {
  min-height: 52px;
  padding: 0 23px;
  border: 0;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
  transition: color 180ms ease, background 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.button:hover { transform: translateY(-2px); }

.button:focus-visible,
.text-button:focus-visible,
.finder-option:focus-visible,
.icon-button:focus-visible,
.faq-item button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
.nav-links a:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 3px;
}

.button-primary { color: var(--ink-deep); background: var(--cyan); }
.button-primary:hover { background: #53d2d3; }
.button-ghost { color: var(--white); border: 1px solid rgba(255, 255, 255, 0.42); background: rgba(10, 35, 55, 0.32); }
.button-ghost:hover { border-color: var(--white); background: rgba(255, 255, 255, 0.08); }
.button-dark { color: var(--white); background: var(--ink); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  border-bottom: 1px solid rgba(16, 42, 67, 0.1);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
}

.nav { height: 100%; display: flex; align-items: center; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-right: auto;
  text-decoration: none;
}

.brand-signal {
  position: relative;
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  border: 4px solid var(--white);
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 1px var(--cyan), 0 0 0 7px rgba(32, 184, 190, 0.13);
}

.brand-copy { display: flex; flex-direction: column; gap: 2px; }
.brand-copy strong { font-size: 18px; font-weight: 820; line-height: 1.15; }
.brand-copy small { color: #6b7f8d; font-size: 9px; font-weight: 700; line-height: 1.2; }

.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links > a { color: #304d61; font-size: 14px; font-weight: 650; text-decoration: none; }
.nav-links > a:hover { color: var(--cyan-dark); }

.nav-links .nav-cta {
  min-height: 44px;
  padding: 0 17px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--white);
  background: var(--ink);
  border-radius: 3px;
}

.nav-cta .icon { width: 18px; height: 18px; flex-basis: 18px; }
.nav-cta .icon > svg { width: 16px; height: 16px; }

.icon-button {
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 4px;
  display: none;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  background: var(--white);
}

.menu-toggle .icon { width: 24px; height: 24px; flex-basis: 24px; }
.menu-toggle .icon > svg { width: 22px; height: 22px; }

.hero {
  position: relative;
  height: calc(100svh - 116px);
  min-height: 650px;
  max-height: 760px;
  overflow: hidden;
  color: var(--white);
  background-color: var(--ink);
  background-image:
    linear-gradient(90deg, rgba(9, 31, 50, 1) 0%, rgba(9, 31, 50, 0.96) 37%, rgba(9, 31, 50, 0.63) 62%, rgba(9, 31, 50, 0.14) 100%),
    url("images/busan-subway-line-2.jpg");
  background-position: center, center;
  background-size: cover;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(0deg, rgba(9, 31, 50, 0.55) 0, transparent 32%);
}

.hero-inner { position: relative; z-index: 2; height: 100%; }

.hero-copy {
  width: min(690px, 58%);
  padding-top: 72px;
}

.eyebrow { display: flex; align-items: center; gap: 10px; color: #82e1e3; }
.eyebrow > span { width: 8px; height: 8px; border-radius: 50%; background: var(--amber); }

.hero h1 {
  margin: 23px 0 22px;
  font-size: 56px;
  font-weight: 830;
  line-height: 1.18;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 610px;
  margin: 0;
  color: #d3e0e6;
  font-size: 18px;
  line-height: 1.72;
}

.hero-actions { display: flex; gap: 12px; margin-top: 32px; }

.hero-source { margin: 18px 0 0; color: #9eb2bc; font-size: 11px; }

.hero-route {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  min-height: 126px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  display: grid;
  grid-template-columns: 210px repeat(3, 1fr);
  align-items: center;
}

.route-label { display: flex; flex-direction: column; gap: 5px; }
.route-label strong { font-size: 16px; }
.route-label span { color: #95aab3; font-size: 12px; }

.hero-stop {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 30px;
}

.hero-stop::before {
  content: "";
  position: absolute;
  top: 39px;
  left: 0;
  right: 0;
  height: 2px;
  background: rgba(120, 173, 187, 0.48);
}

.hero-stop:nth-child(2)::before { left: 50%; }
.hero-stop:last-child::before { right: 50%; }

.route-dot {
  position: absolute;
  top: 30px;
  left: 50%;
  z-index: 2;
  width: 20px;
  height: 20px;
  border: 5px solid var(--ink-deep);
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 1px var(--cyan);
  transform: translateX(-50%);
}

.stop-copy { display: flex; flex-direction: column; gap: 4px; text-align: center; }
.stop-copy strong { font-size: 14px; }
.stop-copy small { color: #9fb2bb; font-size: 11px; }

.finder { background: var(--white); }
.split-intro,
.course-intro,
.route-intro { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 90px; align-items: end; }
.split-intro > p,
.course-intro > p,
.route-intro > div:last-child > p {
  margin: 0 0 5px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.finder-layout { display: grid; grid-template-columns: 1.18fr 0.82fr; gap: 34px; margin-top: 48px; align-items: stretch; }
.finder-options { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }

.finder-option {
  min-height: 302px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 5px;
  display: flex;
  flex-direction: column;
  color: var(--ink);
  text-align: left;
  background: #fbfcfd;
  cursor: pointer;
  transition: border-color 180ms ease, background 180ms ease, transform 180ms ease;
}

.finder-option:hover { border-color: var(--cyan); transform: translateY(-3px); }
.finder-option.is-selected { border-color: var(--cyan-dark); background: #edf9f9; box-shadow: inset 0 4px 0 var(--cyan); }
.option-top { display: flex; align-items: center; justify-content: space-between; }
.option-number { display: grid; width: 34px; height: 34px; place-items: center; color: var(--white); background: var(--ink); font-size: 12px; font-weight: 800; }
.option-icon { width: 42px; height: 42px; flex-basis: 42px; color: var(--cyan-dark); background: #e4f4f4; border-radius: 50%; }
.option-icon > svg { width: 21px; height: 21px; }
.finder-option > strong { margin-top: 27px; font-size: 18px; line-height: 1.4; }
.finder-option > span:nth-child(3) { margin-top: 11px; color: var(--muted); font-size: 14px; line-height: 1.62; }
.option-action { margin-top: auto; display: inline-flex; align-items: center; gap: 7px; color: var(--cyan-dark); font-size: 13px; font-weight: 800; }
.option-action > svg { width: 16px; height: 16px; }

.finder-result {
  min-height: 302px;
  padding: 32px;
  border-radius: 5px;
  color: var(--white);
  background: var(--ink);
  display: flex;
  align-items: stretch;
}

.result-empty { width: 100%; display: flex; flex-direction: column; justify-content: center; }
.result-line { position: relative; width: 100%; height: 26px; margin-bottom: 26px; display: flex; align-items: center; justify-content: space-between; }
.result-line::before { content: ""; position: absolute; left: 5px; right: 5px; top: 12px; height: 1px; background: #426376; }
.result-line i { position: relative; z-index: 2; width: 14px; height: 14px; border: 4px solid var(--ink); border-radius: 50%; background: #537386; box-shadow: 0 0 0 1px #537386; }
.result-empty p { margin: 0 0 7px; color: var(--muted-light); font-size: 13px; }
.result-empty strong { font-size: 22px; line-height: 1.4; }
.result-empty > span:last-child { margin-top: 11px; color: var(--muted-light); font-size: 12px; }

.result-content { width: 100%; }
.result-label { margin: 0 0 18px; color: #80dfe1; font-size: 12px; font-weight: 800; }
.result-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.result-heading h3 { margin: 0; font-size: 28px; }
.result-heading span { color: var(--lime); font-size: 14px; font-weight: 800; }
.result-description { margin: 16px 0; color: #c5d5dc; font-size: 14px; line-height: 1.65; }
.result-subjects { margin: 0 0 22px; padding: 0; display: flex; flex-wrap: wrap; gap: 7px; list-style: none; }
.result-subjects li { padding: 7px 10px; border: 1px solid #385768; border-radius: 3px; color: #d9e5e9; font-size: 11px; }
.result-cta { width: 100%; min-height: 47px; }

.courses { background: var(--paper); }
.course-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 46px; }
.course-card { position: relative; min-height: 544px; padding: 30px; border: 1px solid var(--line); border-radius: 5px; background: var(--white); }
.course-rail { position: absolute; top: 0; left: 0; right: 0; height: 6px; overflow: hidden; }
.course-rail::before { content: ""; position: absolute; top: 2px; left: 0; right: 0; height: 2px; background: #dbe6ea; }
.course-rail span { position: absolute; z-index: 2; top: 0; left: 30px; width: 6px; height: 6px; border-radius: 50%; box-shadow: 0 0 0 3px var(--white); }
.rail-entry span { background: var(--cyan); }
.rail-written span { background: var(--amber); }
.rail-foundation span { background: var(--green); }
.course-meta { display: flex; align-items: center; justify-content: space-between; color: var(--cyan-dark); font-size: 12px; font-weight: 800; }
.course-meta strong { padding: 6px 10px; color: var(--ink); background: #e9f3f5; }
.course-card h3 { margin: 26px 0 16px; font-size: 28px; line-height: 1.32; }
.course-card > p { min-height: 72px; margin: 0; color: var(--muted); font-size: 15px; line-height: 1.65; }
.course-card dl { margin: 26px 0 0; border-top: 1px solid var(--line); }
.course-card dl > div { min-height: 47px; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 92px 1fr; align-items: center; }
.course-card dt { color: #748796; font-size: 12px; }
.course-card dd { margin: 0; font-size: 13px; font-weight: 750; }
.text-button { min-height: 44px; padding: 0; border: 0; display: inline-flex; align-items: center; gap: 8px; color: var(--cyan-dark); background: transparent; font-weight: 800; cursor: pointer; }
.text-button .icon { width: 18px; height: 18px; flex-basis: 18px; }
.text-button .icon > svg { width: 17px; height: 17px; }

.demo-schedule {
  min-height: 108px;
  margin-top: 18px;
  padding: 22px 26px;
  border: 1px solid #ccdce1;
  display: grid;
  grid-template-columns: 1.15fr repeat(3, 0.7fr) 1.3fr;
  align-items: center;
  gap: 24px;
  background: #edf5f6;
}

.demo-heading { display: flex; align-items: center; gap: 10px; }
.demo-heading strong { font-size: 15px; }
.demo-metric { padding-left: 19px; border-left: 1px solid #c4d6dc; display: flex; flex-direction: column; gap: 5px; }
.demo-metric span { color: var(--muted); font-size: 11px; }
.demo-metric strong { font-size: 18px; }
.demo-schedule > p { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.5; }

.status-badge { min-height: 25px; padding: 0 9px; border-radius: 2px; display: inline-flex; align-items: center; justify-content: center; white-space: nowrap; font-size: 10px; font-weight: 800; }
.badge-demo { color: #6a4a00; background: #fff1bd; }
.badge-client { color: #0d6770; background: #dff3f3; }
.badge-policy { color: #765000; background: #fff0bf; }

.faculty { overflow: hidden; color: var(--white); background: var(--ink); }
.faculty-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 95px; }
.faculty .section-kicker { color: #75dde0; }
.faculty-statement h2 { font-size: 46px; }
.faculty-statement h2 em { color: #6de0df; font-style: normal; }
.faculty-statement > p { margin: 25px 0 0; color: #bfd0d7; font-size: 16px; line-height: 1.75; }
.data-note { display: block; margin-top: 25px; color: #829ca8; font-size: 11px; line-height: 1.5; }

.credential-list { margin: 0; padding: 0; border-top: 1px solid var(--line-dark); list-style: none; }
.credential-row { min-height: 114px; padding: 20px 0; border-bottom: 1px solid var(--line-dark); display: grid; grid-template-columns: 42px 1fr auto; gap: 17px; align-items: center; }
.credential-row > .icon { width: 42px; height: 42px; flex-basis: 42px; color: #78dfe1; background: #173b4e; border-radius: 50%; }
.credential-row > .icon > svg { width: 20px; height: 20px; }
.credential-row strong { font-size: 16px; }
.credential-row p { margin: 8px 0 0; color: #9db3bc; font-size: 13px; line-height: 1.5; }

.books { margin-top: 86px; padding-top: 34px; border-top: 1px solid var(--line-dark); display: grid; grid-template-columns: 0.7fr 1.3fr; gap: 60px; }
.books-heading h3 { margin: 12px 0 12px; font-size: 25px; }
.books-heading > p { margin: 0; color: #829aa5; font-size: 12px; }
.book-list { margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); list-style: none; }
.book-list li { min-height: 145px; padding: 20px; border-left: 1px solid var(--line-dark); display: flex; flex-direction: column; justify-content: space-between; }
.book-list span { color: #6cdadd; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 11px; }
.book-list strong { font-size: 15px; line-height: 1.55; }

.license-route { background: var(--white); }
.source-link { min-height: 44px; margin-top: 18px; display: inline-flex; align-items: center; gap: 8px; color: var(--cyan-dark); font-size: 13px; font-weight: 800; }
.source-link .icon { width: 18px; height: 18px; flex-basis: 18px; }
.source-link .icon > svg { width: 16px; height: 16px; }

.official-steps { position: relative; margin: 72px 0 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); list-style: none; }
.official-steps::before { content: ""; position: absolute; top: 28px; left: 10%; right: 10%; height: 2px; background: #b9ccd5; }
.official-steps li { position: relative; z-index: 2; min-height: 142px; display: flex; flex-direction: column; align-items: center; text-align: center; }
.step-node { width: 58px; height: 58px; border: 6px solid var(--white); border-radius: 50%; display: grid; place-items: center; color: var(--white); background: var(--ink); box-shadow: 0 0 0 1px var(--ink); font-size: 12px; font-weight: 800; }
.step-done .step-node { color: var(--ink); background: var(--cyan); box-shadow: 0 0 0 1px var(--cyan); }
.official-steps strong { margin-top: 18px; font-size: 15px; }
.official-steps small { margin-top: 7px; color: var(--muted); font-size: 11px; }

.academy-scope { min-height: 108px; padding: 0 24px; border: 1px solid #c8d9df; display: grid; grid-template-columns: 1.05fr repeat(3, 0.9fr) 1.4fr; align-items: center; gap: 20px; background: var(--mist); }
.scope-label { display: flex; align-items: center; gap: 10px; }
.scope-label .icon { color: var(--cyan-dark); }
.scope-label strong { font-size: 15px; }
.scope-item { padding-left: 18px; border-left: 1px solid #bdced5; display: flex; flex-direction: column; gap: 5px; }
.scope-item span { color: var(--muted); font-size: 11px; }
.scope-item strong { font-size: 14px; }
.academy-scope > p { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.55; }

.support { background: #eff5f6; }
.support-head { display: grid; grid-template-columns: 0.75fr 1fr 0.75fr; gap: 35px; align-items: end; }
.support-head .section-kicker { align-self: start; }
.support-head h2 { margin-top: 0; font-size: 40px; }
.support-head > p { margin: 0 0 4px; color: var(--muted); font-size: 14px; line-height: 1.7; }
.support-list { margin-top: 50px; border-top: 1px solid #bfcfd5; }
.support-list article { min-height: 125px; padding: 20px 4px; border-bottom: 1px solid #bfcfd5; display: grid; grid-template-columns: 52px 48px 1fr auto; gap: 23px; align-items: center; }
.support-number { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; color: #6c828d; font-size: 12px; }
.support-list article > .icon { width: 48px; height: 48px; flex-basis: 48px; color: var(--ink); background: var(--white); border-radius: 50%; }
.support-list article > .icon > svg { width: 21px; height: 21px; }
.support-list h3 { margin: 0; font-size: 18px; }
.support-list p { margin: 8px 0 0; color: var(--muted); font-size: 13px; line-height: 1.55; }

.faq { background: var(--white); }
.faq-grid { display: grid; grid-template-columns: 0.72fr 1.28fr; gap: 100px; align-items: start; }
.faq-intro { position: sticky; top: 112px; }
.faq-intro > p:not(.section-kicker) { margin: 20px 0 26px; color: var(--muted); line-height: 1.7; }
.faq-item { border-top: 1px solid var(--line); }
.faq-item:last-child { border-bottom: 1px solid var(--line); }
.faq-item h3 { margin: 0; }
.faq-item h3 > button { width: 100%; min-height: 84px; padding: 0; border: 0; display: flex; align-items: center; justify-content: space-between; gap: 20px; color: var(--ink); text-align: left; background: transparent; cursor: pointer; }
.faq-item h3 > button > span:first-child { font-size: 16px; font-weight: 760; }
.faq-item button .icon { width: 32px; height: 32px; flex-basis: 32px; border: 1px solid var(--line); border-radius: 50%; transition: transform 180ms ease; }
.faq-item button .icon > svg { width: 16px; height: 16px; }
.faq-item.is-open button .icon { transform: rotate(45deg); }
.faq-answer { padding: 0 54px 25px 0; }
.faq-answer p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.75; }
.faq-answer a { color: var(--cyan-dark); font-weight: 750; }

.inquiry { color: var(--white); background: var(--ink); }
.inquiry-grid { display: grid; grid-template-columns: 0.84fr 1.16fr; gap: 100px; align-items: start; }
.inquiry .section-kicker { color: #72dadd; }
.inquiry-copy h2 { font-size: 42px; }
.inquiry-copy > p:not(.section-kicker):not(.preview-note) { margin: 24px 0 0; color: #b9cbd3; font-size: 16px; line-height: 1.75; }
.inquiry-points { margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--line-dark); display: grid; gap: 12px; }
.inquiry-points > span { display: flex; align-items: center; gap: 9px; color: #d7e3e7; font-size: 13px; }
.inquiry-points .icon { width: 21px; height: 21px; flex-basis: 21px; color: var(--ink); background: var(--cyan); border-radius: 50%; }
.inquiry-points .icon > svg { width: 13px; height: 13px; stroke-width: 3; }
.preview-note { margin: 26px 0 0; display: flex; gap: 9px; color: #829ba7; font-size: 11px; line-height: 1.55; }
.preview-note .icon { width: 18px; height: 18px; flex-basis: 18px; }
.preview-note .icon > svg { width: 15px; height: 15px; }

.inquiry-form { padding: 34px; border-radius: 5px; color: var(--ink); background: var(--white); }
.form-row { margin-bottom: 18px; }
.two-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-row label { display: grid; gap: 8px; font-size: 12px; font-weight: 760; }
.form-row label > span { color: #d14e3f; }
input,
select,
textarea { width: 100%; border: 1px solid #c9d7de; border-radius: 3px; color: var(--ink); background: #fbfcfd; }
input,
select { height: 48px; padding: 0 13px; }
textarea { min-height: 110px; padding: 12px 13px; resize: vertical; line-height: 1.55; }
input::placeholder,
textarea::placeholder { color: #91a1ab; }
input:focus,
select:focus,
textarea:focus { border-color: var(--cyan-dark); }

.privacy-check { min-height: 44px; display: flex; align-items: center; gap: 5px; color: var(--muted); font-size: 11px; line-height: 1.5; }
.privacy-check label { display: flex; align-items: center; gap: 9px; cursor: pointer; }
.privacy-check input { width: 17px; height: 17px; margin: 0; flex: 0 0 17px; accent-color: var(--cyan-dark); }
.privacy-detail { min-width: 58px; min-height: 44px; padding: 0 4px; border: 0; display: inline-flex; align-items: center; justify-content: center; color: var(--cyan-dark); background: transparent; text-decoration: underline; cursor: pointer; }
.privacy-panel { margin: 10px 0 0 26px; padding: 12px; background: #f0f5f7; }
.privacy-panel p { margin: 0; color: var(--muted); font-size: 10px; line-height: 1.6; }
.form-submit { width: 100%; min-height: 53px; margin-top: 22px; color: var(--ink-deep); background: var(--cyan); }
.form-status { min-height: 20px; margin: 12px 0 0; color: var(--green); font-size: 12px; font-weight: 700; text-align: center; }

.site-footer { padding: 58px 0 26px; color: var(--white); background: var(--ink-deep); }
.footer-grid { display: grid; grid-template-columns: 1fr 1.4fr 0.55fr; gap: 50px; align-items: start; }
.footer-brand { display: flex; align-items: center; gap: 13px; }
.footer-brand > div { display: flex; flex-direction: column; gap: 6px; }
.footer-brand strong { font-size: 18px; }
.footer-brand span:last-child { color: #8ca4af; font-size: 11px; }
.footer-info { display: grid; gap: 10px; }
.footer-info p { margin: 0; display: grid; grid-template-columns: 95px 1fr; color: #a9bdc5; font-size: 11px; }
.footer-info p > span { color: #6f8b97; }
.footer-info em { margin-left: 7px; color: var(--amber); font-style: normal; }
.footer-links { display: grid; gap: 11px; }
.footer-links a { color: #aec0c7; font-size: 11px; text-decoration: none; }
.footer-bottom { margin-top: 36px; padding-top: 20px; border-top: 1px solid #1d3a4a; display: flex; justify-content: space-between; gap: 20px; color: #6f8894; font-size: 10px; }
.footer-bottom a { color: #8da5af; }

.demo-notice { padding: 13px max(28px, calc((100% - var(--container)) / 2)); color: #5d4a15; background: #fff3c6; font-size: 10px; line-height: 1.55; text-align: center; }
.mobile-consult { display: none; }

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

@media (max-width: 1080px) {
  .container { width: min(var(--container), calc(100% - 40px)); }
  .nav-links { gap: 18px; }
  .nav-links > a { font-size: 13px; }
  .hero { background-position: center, 58% center; }
  .hero-copy { width: 65%; }
  .finder-layout { grid-template-columns: 1fr; }
  .finder-result { min-height: 280px; }
  .faculty-grid,
  .faq-grid,
  .inquiry-grid { gap: 56px; }
  .support-head { grid-template-columns: 0.5fr 1fr 0.8fr; }
  .academy-scope { grid-template-columns: 0.9fr repeat(3, 0.8fr); padding-block: 20px; }
  .academy-scope > p { grid-column: 1 / -1; padding-top: 14px; border-top: 1px solid #bdced5; }
}

@media (max-width: 860px) {
  :root { --header-height: 68px; }
  .section { padding: 84px 0; }
  .container { width: min(100% - 32px, var(--container)); }
  .icon-button { display: inline-flex; }
  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    height: calc(100svh - var(--header-height));
    padding: 38px 24px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--white);
  }
  .nav-links.is-open { display: flex; }
  .nav-links > a { min-height: 56px; border-bottom: 1px solid var(--line); display: flex; align-items: center; font-size: 16px; }
  .nav-links .nav-cta { min-height: 52px; margin-top: 22px; justify-content: center; border: 0; }
  .hero {
    height: calc(100svh - 100px);
    min-height: 590px;
    max-height: 700px;
    background-image:
      linear-gradient(90deg, rgba(9, 31, 50, 0.98) 0%, rgba(9, 31, 50, 0.9) 53%, rgba(9, 31, 50, 0.48) 100%),
      url("images/busan-subway-line-2.jpg");
    background-position: center, 64% center;
  }
  .hero-copy { width: 82%; padding-top: 55px; }
  .hero h1 { font-size: 45px; }
  .hero-lead { font-size: 16px; }
  .hero-route { grid-template-columns: repeat(3, 1fr); min-height: 110px; }
  .route-label { display: none; }
  .split-intro,
  .course-intro,
  .route-intro,
  .faculty-grid,
  .books,
  .faq-grid,
  .inquiry-grid { grid-template-columns: 1fr; gap: 34px; }
  .finder-options,
  .course-grid { grid-template-columns: 1fr; }
  .finder-option { min-height: 240px; }
  .course-card { min-height: auto; }
  .course-card > p { min-height: 0; }
  .course-card .text-button { margin-top: 16px; }
  .demo-schedule { grid-template-columns: 1fr repeat(3, 1fr); }
  .demo-schedule > p { grid-column: 1 / -1; }
  .faculty-statement h2 { font-size: 40px; }
  .book-list { grid-template-columns: 1fr 1fr; }
  .book-list li { border-bottom: 1px solid var(--line-dark); }
  .official-steps { grid-template-columns: repeat(5, 160px); overflow-x: auto; padding-bottom: 15px; }
  .official-steps::before { left: 80px; right: 80px; }
  .academy-scope { grid-template-columns: 1fr 1fr 1fr; }
  .scope-label { grid-column: 1 / -1; }
  .scope-item:first-of-type { border-left: 0; padding-left: 0; }
  .support-head { grid-template-columns: 1fr; gap: 14px; }
  .support-head h2 { font-size: 36px; }
  .faq-intro { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-links { grid-column: 1 / -1; grid-template-columns: repeat(4, auto); justify-content: start; gap: 24px; }
}

@media (max-width: 560px) {
  .section { padding: 70px 0; }
  .brand-copy strong { font-size: 16px; }
  .brand-copy small { display: none; }
  .section-intro h2,
  .faculty-statement h2,
  .route-intro h2,
  .support-head h2,
  .faq-intro h2,
  .inquiry-copy h2 { font-size: 33px; }
  .hero { min-height: 570px; background-position: center, 68% center; }
  .hero-copy { width: 100%; padding-top: 42px; }
  .hero h1 { margin-top: 18px; font-size: 38px; line-height: 1.2; }
  .hero-lead { max-width: 94%; font-size: 15px; line-height: 1.65; }
  .hero-actions { max-width: 285px; margin-top: 24px; flex-direction: column; gap: 8px; }
  .hero-actions .button { min-height: 47px; }
  .hero-source { display: none; }
  .hero-route { min-height: 94px; }
  .hero-stop { padding: 25px 4px 0; }
  .hero-stop::before { top: 27px; }
  .route-dot { top: 20px; width: 16px; height: 16px; border-width: 4px; }
  .stop-copy strong { font-size: 12px; }
  .stop-copy small { font-size: 10px; }
  .finder-layout { margin-top: 34px; }
  .finder-option { min-height: 220px; padding: 22px; }
  .finder-result { min-height: 290px; padding: 26px; }
  .course-card { padding: 25px; }
  .course-card h3 { font-size: 25px; }
  .demo-schedule { padding: 20px; grid-template-columns: 1fr 1fr; gap: 18px; }
  .demo-heading { grid-column: 1 / -1; }
  .demo-metric { padding-left: 0; border-left: 0; }
  .demo-metric:nth-of-type(3) { grid-column: 1 / -1; padding-top: 14px; border-top: 1px solid #c4d6dc; }
  .credential-row { grid-template-columns: 40px 1fr; }
  .credential-row > .status-badge { grid-column: 2; justify-self: start; }
  .book-list { grid-template-columns: 1fr 1fr; }
  .book-list li { min-height: 132px; padding: 16px; }
  .book-list strong { font-size: 13px; }
  .route-intro { gap: 22px; }
  .official-steps { margin-top: 48px; }
  .academy-scope { grid-template-columns: 1fr; gap: 0; padding: 20px; }
  .scope-item { min-height: 55px; padding-left: 0; border-left: 0; border-top: 1px solid #bdced5; justify-content: center; }
  .support-list article { grid-template-columns: 38px 42px 1fr; gap: 13px; }
  .support-list article > .icon { width: 42px; height: 42px; flex-basis: 42px; }
  .support-list article > .status-badge { grid-column: 3; justify-self: start; }
  .faq-item h3 > button { min-height: 76px; }
  .faq-answer { padding-right: 0; }
  .inquiry-form { padding: 24px 18px; }
  .two-columns { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-links { grid-column: auto; grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; }
  .demo-notice { padding: 12px 16px 78px; text-align: left; }
  .mobile-consult {
    position: fixed;
    right: 16px;
    bottom: 16px;
    z-index: 45;
    min-height: 50px;
    padding: 0 18px;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--ink-deep);
    background: var(--cyan);
    box-shadow: 0 12px 28px rgba(4, 29, 43, 0.25);
    font-size: 13px;
    font-weight: 850;
    text-decoration: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}