/* ==========================================================================
   서울교습소철거 — 대형 타이포 히어로형
   모노크롬(흑/백/그레이) + 단일 포인트 컬러(라임), 타이포그래피 위계 중심
   ========================================================================== */

:root {
  --ink: #0a0a0a;
  --ink-soft: #1c1c1c;
  --paper: #ffffff;
  --gray-1: #f4f4f4;
  --gray-2: #d9d9d9;
  --gray-3: #8a8a8a;
  --gray-4: #4a4a4a;
  --accent: #d4ff3d;
  --accent-ink: #0a0a0a;
  --max-w: 1120px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: "Noto Sans KR", "Pretendard", -apple-system, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  word-break: keep-all;
  overflow-x: hidden;
}

a { color: inherit; }

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

table { max-width: 100%; }

/* ---------------------------------- header ---------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--ink);
  border-bottom: 1px solid var(--ink-soft);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  font-weight: 900;
  font-size: 1.1rem;
  color: var(--paper);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.main-nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.main-nav a {
  color: var(--gray-2);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: color 0.15s ease;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--accent);
}

/* ---------------------------------- hero ------------------------------- */

.hero {
  background: var(--ink);
  color: var(--paper);
  padding: 12vw 24px 9vw;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      to bottom,
      transparent,
      transparent 63px,
      rgba(255, 255, 255, 0.035) 64px
    );
  pointer-events: none;
}

.hero-eyebrow {
  position: relative;
  margin: 0 0 18px;
  font-size: 0.78rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}

.hero h1 {
  position: relative;
  margin: 0 auto;
  max-width: 16ch;
  font-size: clamp(3rem, 12vw, 8.5rem);
  line-height: 0.98;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--paper);
}

.hero-lead {
  position: relative;
  max-width: 700px;
  margin: 32px auto 0;
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--gray-2);
  font-weight: 400;
}

.hero-lead strong {
  color: var(--accent);
  font-weight: 700;
}

.hero .cta-button {
  position: relative;
  margin-top: 40px;
}

/* ---------------------------------- cta button -------------------------- */

.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  padding: 0 40px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 900;
  font-size: 1.02rem;
  text-decoration: none;
  border-radius: 999px;
  letter-spacing: -0.01em;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.cta-button:hover,
.cta-button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(212, 255, 61, 0.35);
}

/* ---------------------------------- content stack ----------------------- */

main { background: var(--paper); }

.content-stack {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.block {
  padding: 64px 0;
  border-bottom: 1px solid var(--gray-1);
}

.block h2 {
  font-size: clamp(1.5rem, 3.4vw, 2.4rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin: 0 0 24px;
  line-height: 1.25;
}

.block > p {
  font-size: 1.02rem;
  color: var(--gray-4);
  max-width: 76ch;
}

/* ------------------------------- region block ---------------------------- */

.region-block .region-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 2px solid var(--ink);
  margin-bottom: 28px;
}

.region-row {
  padding: 28px 28px 28px 0;
  border-bottom: 1px solid var(--gray-2);
}

.region-row:nth-child(odd) {
  border-right: 1px solid var(--gray-2);
  padding-right: 28px;
}

.region-row:nth-child(even) {
  padding-left: 28px;
}

.region-name {
  display: inline-block;
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
  position: relative;
}

.region-name::after {
  content: "";
  display: block;
  width: 32px;
  height: 4px;
  background: var(--accent);
  margin-top: 8px;
}

.region-row p {
  margin: 0;
  color: var(--gray-4);
  font-size: 0.98rem;
}

/* ------------------------------- table ----------------------------------- */

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
  font-size: 0.95rem;
}

thead th {
  text-align: left;
  font-weight: 900;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--paper);
  background: var(--ink);
  padding: 14px 16px;
}

tbody td {
  padding: 16px;
  border-bottom: 1px solid var(--gray-2);
  color: var(--ink);
}

tbody tr:nth-child(even) { background: var(--gray-1); }

.table-note {
  margin-top: 16px;
  font-size: 0.86rem;
  color: var(--gray-3);
}

/* ------------------------------- lists ------------------------------------ */

.procedure-list {
  list-style: none;
  counter-reset: step;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.procedure-list li {
  counter-increment: step;
  position: relative;
  padding: 20px 0 20px 64px;
  border-bottom: 1px solid var(--gray-2);
  font-weight: 700;
  font-size: 1.05rem;
}

.procedure-list li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 18px;
  font-size: 1.05rem;
  font-weight: 900;
  color: var(--accent-ink);
  background: var(--accent);
  min-width: 40px;
  height: 40px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.checklist {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.checklist li {
  position: relative;
  padding-left: 30px;
  font-size: 1rem;
  color: var(--ink);
}

.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  font-weight: 900;
  color: var(--ink);
  background: var(--accent);
  width: 20px;
  height: 20px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
}

/* ------------------------------- gallery ----------------------------------- */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  justify-items: center;
}

.gallery-grid picture {
  width: 100%;
}

.gallery-grid img {
  width: 100%;
  height: auto;
  border-radius: 4px;
  filter: grayscale(100%) contrast(1.05);
  transition: filter 0.2s ease;
}

.gallery-grid img:hover {
  filter: grayscale(0%);
}

/* ------------------------------- caution / updated ---------------------------- */

.updated-note {
  margin-top: 20px;
  font-size: 0.84rem;
  color: var(--gray-3);
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* ------------------------------- FAQ ---------------------------------------- */

.faq-block h3 {
  font-size: 1.12rem;
  font-weight: 900;
  margin: 32px 0 10px;
  letter-spacing: -0.01em;
  padding-left: 34px;
  position: relative;
}

.faq-block h3::before {
  content: "Q";
  position: absolute;
  left: 0;
  top: -2px;
  font-size: 1rem;
  font-weight: 900;
  color: var(--accent-ink);
  background: var(--accent);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.faq-block h3:first-of-type { margin-top: 4px; }

.faq-block p {
  margin: 0 0 8px;
  padding-left: 34px;
  color: var(--gray-4);
  font-size: 0.98rem;
  max-width: 74ch;
}

/* ------------------------------- related links ------------------------------ */

.related-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.related-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px;
  min-height: 44px;
  text-decoration: none;
  border: 1px solid var(--gray-2);
  border-radius: 4px;
  font-weight: 700;
  color: var(--ink);
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.related-card:hover,
.related-card:focus-visible {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
  transform: translateY(-2px);
}

.related-card-arrow {
  color: var(--accent);
  font-weight: 900;
}

/* ------------------------------- final CTA ----------------------------------- */

.cta-block {
  padding: 80px 0 96px;
  text-align: center;
}

.cta-block h2 {
  font-size: clamp(1.7rem, 4vw, 2.6rem);
}

.cta-block p {
  max-width: 56ch;
  margin: 0 auto 32px;
  color: var(--gray-4);
}

/* ---------------------------------- footer ------------------------------------ */

footer {
  background: var(--ink);
  padding: 28px 24px;
}

footer address {
  max-width: var(--max-w);
  margin: 0 auto;
  font-style: normal;
  font-size: 0.82rem;
  color: var(--gray-3);
  text-align: center;
  line-height: 1.8;
}

footer a {
  color: var(--accent);
  text-decoration: none;
}

/* ==============================================================================
   반응형
   ============================================================================== */

@media (max-width: 768px) {
  .header-inner { padding: 12px 18px; }
  .main-nav { gap: 12px; }
  .main-nav a { font-size: 0.86rem; }

  .hero { padding: 18vw 18px 14vw; }
  .hero h1 { font-size: clamp(2.6rem, 13vw, 5rem); max-width: 12ch; }

  .content-stack { padding: 0 18px; }
  .block { padding: 44px 0; }

  .region-block .region-list {
    grid-template-columns: 1fr;
  }
  .region-row,
  .region-row:nth-child(odd),
  .region-row:nth-child(even) {
    padding: 22px 0;
    border-right: none;
  }

  table, thead, tbody, th, td, tr { display: block; }
  thead { display: none; }
  tbody tr {
    border-bottom: 2px solid var(--ink);
    padding: 12px 0;
  }
  tbody td {
    border-bottom: none;
    padding: 6px 0;
    display: flex;
    justify-content: space-between;
    gap: 12px;
  }
  tbody td::before {
    content: attr(data-label);
    font-weight: 700;
    color: var(--gray-3);
    flex-shrink: 0;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .related-cards {
    grid-template-columns: 1fr;
  }

  .cta-block { padding: 60px 0 72px; }
}

@media (max-width: 480px) {
  .brand { font-size: 1rem; }
  .main-nav { gap: 10px; }
  .main-nav a { font-size: 0.8rem; }

  .hero { padding: 22vw 16px 16vw; }
  .hero h1 { font-size: clamp(2.2rem, 14vw, 3.6rem); }
  .hero-lead { font-size: 0.95rem; }

  .cta-button { width: 100%; padding: 0 24px; }

  .block h2 { font-size: 1.5rem; }

  .gallery-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .faq-block h3 { font-size: 1rem; }
  .faq-block p { padding-left: 0; margin-top: 4px; }
  .faq-block h3 { padding-left: 30px; }
}