:root {
  --primary: #1A1A1A;
  --accent: #FFD400;
  --bg: #FFFFFF;
  --radius: 0px;
  --font-display: 'Do Hyeon', sans-serif;
  --font-body: 'Noto Sans KR', sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--primary);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.7;
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--primary);
  line-height: 1.35;
  margin: 0 0 0.75em;
}

h1 { font-size: clamp(1.9rem, 5vw, 2.6rem); }
h2 { font-size: clamp(1.4rem, 3.6vw, 1.8rem); display: flex; align-items: center; gap: 0.5rem; }
h3 { font-size: 1.15rem; margin-top: 1.5em; }

p { margin: 0 0 1em; }

a { color: var(--primary); }

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

:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* ---------- Header ---------- */
.site-header {
  background: var(--bg);
  border-bottom: 2px solid var(--primary);
  position: sticky;
  top: 0;
  z-index: 20;
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.9rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--primary);
}

.nav-toggle { position: relative; }

.nav-toggle__btn {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 32px;
  padding: 6px 0;
}

.nav-toggle__btn::-webkit-details-marker { display: none; }

.nav-toggle__btn span {
  display: block;
  height: 3px;
  background: var(--primary);
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  text-decoration: none;
  font-weight: 500;
}

.site-nav a:hover { text-decoration: underline; }

@media (max-width: 860px) {
  .nav-toggle[open] .site-nav {
    position: absolute;
    right: 0;
    top: calc(100% + 0.6rem);
    background: var(--bg);
    border: 2px solid var(--primary);
    box-shadow: 6px 6px 0 var(--primary);
    padding: 1rem 1.25rem;
    min-width: 220px;
  }
  .nav-toggle:not([open]) .site-nav { display: none; }
  .site-nav ul { display: flex; flex-direction: column; gap: 0.75rem; }
}

@media (min-width: 861px) {
  .nav-toggle__btn { display: none; }
  .site-nav { display: block !important; }
  .site-nav ul { display: flex; gap: 1.5rem; }
}

/* ---------- Hero ---------- */
.hero-bar {
  height: 14px;
  background: var(--accent);
}

.hero-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 3.5rem 1.25rem 3rem;
}

.hero-lead {
  font-size: 1.05rem;
  max-width: 60ch;
}

.hero-cta { margin-top: 1.75rem; }

/* ---------- Sections ---------- */
main {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.content-section {
  background: var(--bg);
  box-shadow: 0 4px 18px rgba(26, 26, 26, 0.14);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  margin: 2rem 0;
}

.h2-icon { flex: none; }

/* ---------- Term cards ---------- */
.term-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin: 1.25rem 0;
}

.term-card {
  flex: 1 1 220px;
  border: 2px solid var(--primary);
  padding: 1.25rem;
}

.term-card h3 { margin-top: 0; }

/* ---------- Checklist ---------- */
.checklist {
  list-style: none;
  margin: 1.25rem 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.checklist li {
  position: relative;
  padding-left: 2rem;
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.15em;
  width: 1.2em;
  height: 1.2em;
  border: 2px solid var(--primary);
  background: var(--accent);
}

/* ---------- Tables ---------- */
.table-wrap {
  overflow-x: auto;
  margin: 1rem 0 1.5rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 480px;
}

th, td {
  border: 1px solid var(--primary);
  padding: 0.75rem;
  text-align: left;
  font-size: 0.95rem;
}

thead th {
  background: var(--primary);
  color: #FFFFFF;
  font-family: var(--font-display);
  font-weight: 400;
}

tbody th {
  background: #F5F5F5;
  font-weight: 500;
}

/* ---------- Callout ---------- */
.callout {
  border-left: 6px solid var(--accent);
  background: #FAFAFA;
  padding: 1.25rem 1.5rem;
  margin: 1.25rem 0;
}

.callout p:last-child { margin-bottom: 0; }

/* ---------- Figure ---------- */
.shot {
  margin-inline: auto;
  max-width: 900px;
  margin-block: 2rem;
}

.shot img { border: 2px solid var(--primary); }

.shot figcaption {
  font-size: 0.9rem;
  color: var(--primary);
  margin-top: 0.6rem;
  text-align: center;
}

/* ---------- FAQ ---------- */
.faq-item {
  border: 2px solid var(--primary);
  padding: 1rem 1.25rem;
  margin-bottom: 0.9rem;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 500;
  list-style: none;
}

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

.faq-item summary::before {
  content: "+";
  display: inline-block;
  width: 1.2em;
  color: var(--primary);
  font-family: var(--font-display);
}

.faq-item[open] summary::before { content: "-"; }

.faq-item p { margin-top: 0.9rem; margin-bottom: 0; }

/* ---------- CTA buttons (shared arrow style) ---------- */
.cta {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  font-weight: 500;
  padding: 1rem 1.5rem;
  border: 2px solid var(--primary);
  border-radius: var(--radius);
  background: var(--accent);
  color: var(--primary);
}

.cta-arrow { flex: none; }

.cta--call { background: var(--accent); color: var(--primary); }
.cta--sms { background: var(--bg); color: var(--primary); }

/* ---------- Bottom CTA block ---------- */
.cta-block {
  background: var(--primary);
  color: #FFFFFF;
  box-shadow: 0 4px 18px rgba(26, 26, 26, 0.14);
  border-radius: var(--radius);
  padding: 2.25rem 1.75rem;
  margin: 2rem 0;
  text-align: center;
}

.cta-block__title {
  color: #FFFFFF;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3.4vw, 1.6rem);
  margin: 0;
}

.cta-block__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-top: 1.5rem;
}

.cta-block .cta--sms {
  background: transparent;
  color: #FFFFFF;
  border-color: #FFFFFF;
}

/* ---------- Related links ---------- */
.related-list {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.related-list a {
  display: block;
  border: 2px solid var(--primary);
  padding: 0.9rem 1.1rem;
  text-decoration: none;
  font-weight: 500;
}

.related-list a:hover { background: var(--accent); }

/* ---------- Footer ---------- */
footer {
  border-top: 2px solid var(--primary);
  margin-top: 3rem;
  padding: 2rem 1.25rem 2.5rem;
  text-align: center;
}

footer address {
  font-style: normal;
  font-size: 0.9rem;
  line-height: 1.8;
}

footer small { display: block; margin-top: 1rem; font-size: 0.8rem; }

@media (max-width: 360px) {
  .content-section, .cta-block { padding: 1.5rem 1.1rem; }
  .cta { width: 100%; justify-content: center; }
}