/* 바닥코팅내구성 — 차분한 에디토리얼 레이아웃, 좌우 교차 아이콘+텍스트 행 구성 */

:root {
  --primary: #1B4332;
  --accent: #95D5B2;
  --ink: #1e2b24;
  --sub: #4a5a51;
  --line: #d8e6dd;
  --paper: #f3f8f5;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Noto Sans KR", -apple-system, "Malgun Gothic", sans-serif;
  color: var(--ink);
  background: #fff;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2 {
  font-family: "Gowun Batang", serif;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.01em;
}

a { color: inherit; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.section-inner, .split-inner { max-width: 1100px; margin: 0 auto; }

/* ---------- 헤더 ---------- */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.logo {
  color: var(--primary);
  font-family: "Gowun Batang", serif;
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
}
.menu-toggle {
  width: 44px; height: 44px;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 5px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
}
.menu-toggle span { width: 20px; height: 2px; background: var(--primary); }

#primary-nav {
  display: none;
  flex-direction: column;
  width: 100%;
}
#primary-nav.is-open { display: flex; }
#primary-nav a {
  color: var(--ink);
  text-decoration: none;
  padding: 12px 8px;
  min-height: 44px;
  display: flex;
  align-items: center;
  border-top: 1px solid var(--line);
  font-size: 0.96rem;
}
#primary-nav a:hover { color: var(--primary); }

@media (min-width: 768px) {
  .menu-toggle { display: none; }
  #primary-nav {
    display: flex;
    flex-direction: row;
    width: auto;
    gap: 6px;
  }
  #primary-nav a { border-top: none; padding: 10px 14px; }
}

/* ---------- 버튼: 은은한 라운드, 얇은 테두리 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 28px;
  border-radius: 999px;
  font-weight: 500;
  font-size: 0.98rem;
  text-decoration: none;
  border: 1px solid var(--primary);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: #143528; }
.btn-ghost { background: transparent; color: var(--primary); }
.btn-ghost:hover { background: var(--paper); }

.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------- 히어로: 넉넉한 여백 ---------- */
.hero {
  max-width: 780px;
  margin: 0 auto;
  padding: 64px 20px 48px;
  text-align: center;
}
.eyebrow {
  margin: 0 0 14px;
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  color: var(--primary);
  font-weight: 600;
}
.hero h1 {
  font-size: clamp(2rem, 6vw, 2.7rem);
  margin: 0 0 20px;
  line-height: 1.3;
}
.hero-sub {
  max-width: 42em;
  margin: 0 auto 28px;
  color: var(--sub);
  font-size: 1.02rem;
}
.hero .hero-cta { justify-content: center; }

/* ---------- 요인 섹션: 좌우 교차 아이콘 행 ---------- */
.factors-section { padding: 40px 20px 20px; }
.factors-section h2 {
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  margin: 0 0 14px;
  text-align: center;
}
.lead {
  max-width: 46em;
  margin: 0 auto 44px;
  text-align: center;
  color: var(--sub);
}

.factor-row {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: center;
  padding: 28px 0;
  border-top: 1px solid var(--line);
}
.factor-row:last-child { border-bottom: 1px solid var(--line); }

.factor-icon {
  flex: 0 0 auto;
  width: 76px; height: 76px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--paper);
  border: 1px solid var(--line);
  color: var(--primary);
}
.factor-icon svg { width: 38px; height: 38px; }

.factor-text { flex: 1; }
.factor-text h3 {
  margin: 0 0 8px;
  font-size: 1.18rem;
  color: var(--primary);
}
.factor-text p { margin: 0; color: var(--sub); }
.factor-text a { color: var(--primary); text-decoration: underline; }

@media (min-width: 768px) {
  .factor-row {
    flex-direction: row;
    text-align: left;
    gap: 36px;
  }
  .factor-row.reverse { flex-direction: row-reverse; }
  .factor-row.reverse .factor-text { text-align: right; }
}

/* ---------- 분할 섹션 (텍스트 + 비주얼 태그) ---------- */
.split-section, .signal-section {
  padding: 48px 20px;
  background: var(--paper);
}
.split-inner {
  display: flex;
  flex-direction: column;
  gap: 28px;
  align-items: center;
}
.split-text h2 {
  font-size: clamp(1.4rem, 3.2vw, 1.9rem);
  margin: 0 0 16px;
}
.split-text p { margin: 0 0 14px; color: var(--sub); }
.split-text p:last-child { margin-bottom: 0; }
.split-text a { color: var(--primary); text-decoration: underline; }

.split-visual {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
}
.tag {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid var(--primary);
  background: #fff;
  color: var(--primary);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-align: center;
}
.tag.alt { background: var(--accent); border-color: var(--accent); color: #143528; }

.warn-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px; height: 64px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--primary);
  color: var(--primary);
  font-family: "Gowun Batang", serif;
  font-size: 1.8rem;
  font-weight: 700;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .split-inner { flex-direction: row; align-items: flex-start; }
  .split-inner .split-text { flex: 1.4; }
  .split-inner .split-visual { flex: 1; }
  .signal-section .split-inner .split-visual { flex: 0 0 100px; }
}

/* ---------- 준비 그리드 ---------- */
.prepare-section { padding: 48px 20px; }
.prepare-section h2 {
  font-size: clamp(1.4rem, 3.2vw, 1.9rem);
  margin: 0 0 28px;
  text-align: center;
}
.prepare-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .prepare-grid { grid-template-columns: repeat(2, 1fr); }
}
.prepare-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}
.prepare-label {
  margin: 0 0 8px;
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--accent);
  background: var(--primary);
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-weight: 600;
}
.prepare-card h3 { margin: 0 0 10px; font-size: 1.1rem; color: var(--primary); }
.prepare-card p { margin: 0; color: var(--sub); font-size: 0.96rem; }

/* ---------- FAQ ---------- */
.faq-section { padding: 48px 20px; }
.faq-section h2 {
  font-size: clamp(1.4rem, 3.2vw, 1.9rem);
  margin: 0 0 24px;
  text-align: center;
}
.accordion-item { border-bottom: 1px solid var(--line); }
.accordion-trigger {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 18px 4px;
  min-height: 44px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.accordion-trigger::after {
  content: "+";
  color: var(--primary);
  font-size: 1.2rem;
  flex-shrink: 0;
}
.accordion-trigger[aria-expanded="true"]::after { content: "\2212"; }
.accordion-panel { padding: 0 4px 18px; }
.accordion-panel p { margin: 0; color: var(--sub); }

/* ---------- CTA ---------- */
.cta-section {
  padding: 52px 20px 60px;
  background: var(--primary);
  color: #fff;
  text-align: center;
}
.cta-inner h2 {
  color: #fff;
  font-size: clamp(1.4rem, 3.2vw, 1.9rem);
  margin: 0 0 12px;
}
.cta-inner p { margin: 0 0 26px; color: #cfe6da; }
.cta-inner .hero-cta { justify-content: center; }
.cta-inner .btn-primary { background: var(--accent); border-color: var(--accent); color: #143528; }
.cta-inner .btn-primary:hover { background: #7fc79f; }
.cta-inner .btn-ghost { color: #fff; border-color: rgba(255,255,255,0.5); }
.cta-inner .btn-ghost:hover { background: rgba(255,255,255,0.08); }

/* ---------- 푸터 ---------- */
.site-footer {
  background: #12261c;
  color: #b9ccc0;
  padding: 40px 20px 28px;
}
.footer-nav {
  max-width: 1100px;
  margin: 0 auto 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
}
.footer-nav a {
  color: #b9ccc0;
  text-decoration: none;
  font-size: 0.92rem;
  min-height: 44px;
  display: flex;
  align-items: center;
}
.footer-nav a:hover { color: var(--accent); }
.site-footer address {
  max-width: 1100px;
  margin: 0 auto 16px;
  font-style: normal;
  font-size: 0.9rem;
  line-height: 1.9;
  color: #8ba396;
}
.site-footer address a { color: #fff; text-decoration: none; }
.site-footer p { max-width: 1100px; margin: 0 auto; font-size: 0.85rem; color: #628072; }

/* ---------- 반응형 여백 확장 ---------- */
@media (min-width: 1024px) {
  .factors-section, .split-section, .signal-section, .prepare-section, .faq-section, .cta-section {
    padding-left: 32px;
    padding-right: 32px;
  }
}
@media (min-width: 1280px) {
  .factors-section, .split-section, .signal-section, .prepare-section, .faq-section, .cta-section {
    padding-left: 40px;
    padding-right: 40px;
  }
}

/* 현장 사진 */
.site-photo-section { max-width: 1000px; margin: 0 auto; padding: 40px 20px; }
.site-photo-section h2 { color: var(--primary); margin: 0 0 18px; }
.site-photo-grid { display: grid; grid-template-columns: 1fr; gap: 12px; }
.site-photo-grid picture { display: block; aspect-ratio: 4/3; overflow: hidden; }
.site-photo-grid img { width: 100%; height: 100%; object-fit: cover; }
@media (min-width: 640px) { .site-photo-grid { grid-template-columns: repeat(2, 1fr); } }