/* 바닥코팅내열성 — 웜톤 방사형 그라데이션 히어로, 카드 그리드 중심 구성 */

:root {
  --primary: #6F1D1B;
  --accent: #FFB703;
  --ink: #2a1210;
  --sub: #5b433f;
  --line: #e8d6c9;
  --paper: #fbf1e6;
  --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: "Dokdo", cursive;
  font-weight: 400;
  color: var(--primary);
  letter-spacing: 0.02em;
}

a { color: inherit; }

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

.section-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: "Dokdo", cursive;
  font-weight: 400;
  font-size: 1.4rem;
  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: 웜 글로우 그림자 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 28px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  border: 2px solid var(--primary);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 18px rgba(111, 29, 27, 0.35), 0 0 0 rgba(255, 183, 3, 0);
}
.btn-primary:hover {
  background: #8a2621;
  box-shadow: 0 8px 22px rgba(111, 29, 27, 0.4), 0 0 16px rgba(255, 183, 3, 0.45);
  transform: translateY(-1px);
}
.btn-ghost { background: transparent; color: var(--primary); }
.btn-ghost:hover { background: var(--paper); }

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

/* ---------- 히어로: 방사형 웜 그라데이션 ---------- */
.hero {
  position: relative;
  max-width: 100%;
  margin: 0;
  padding: 72px 20px 56px;
  text-align: center;
  background:
    radial-gradient(circle at 50% 0%, rgba(255, 183, 3, 0.35), transparent 55%),
    radial-gradient(circle at 15% 85%, rgba(111, 29, 27, 0.25), transparent 60%),
    linear-gradient(180deg, #fff6ea 0%, #fff 70%);
  border-bottom: 1px solid var(--line);
}
.eyebrow {
  margin: 0 0 14px;
  font-size: 0.78rem;
  letter-spacing: 0.24em;
  color: var(--primary);
  font-weight: 700;
}
.hero h1 {
  font-size: clamp(2.6rem, 9vw, 4rem);
  margin: 0 0 18px;
  line-height: 1.2;
}
.hero-sub {
  max-width: 42em;
  margin: 0 auto 28px;
  color: var(--sub);
  font-size: 1.02rem;
}
.hero .hero-cta { justify-content: center; }

/* ---------- 고온 구역 카드 그리드 ---------- */
.zone-section { padding: 48px 20px 20px; }
.zone-section h2 {
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  margin: 0 0 14px;
  text-align: center;
}
.lead {
  max-width: 48em;
  margin: 0 auto 40px;
  text-align: center;
  color: var(--sub);
}

.zone-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .zone-grid { grid-template-columns: repeat(2, 1fr); }
}

.zone-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--accent);
  border-radius: var(--radius);
  background: var(--paper);
}
.zone-icon {
  width: 52px; height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--primary);
  margin-bottom: 14px;
}
.zone-icon svg { width: 28px; height: 28px; }
.zone-card h3 { margin: 0 0 8px; font-size: 1.15rem; color: var(--primary); }
.zone-card p { margin: 0; color: var(--sub); font-size: 0.96rem; }
.zone-card a { color: var(--primary); text-decoration: underline; }

/* ---------- 비교 섹션: 2컬럼 카드 ---------- */
.compare-section { padding: 48px 20px; background: #fff; }
.compare-section h2 {
  font-size: clamp(1.7rem, 4.4vw, 2.3rem);
  margin: 0 0 18px;
  text-align: center;
}
.compare-section p { color: var(--sub); max-width: 52em; margin: 0 auto 16px; }
.compare-section > .section-inner > p:last-of-type { margin-bottom: 32px; }

.compare-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .compare-grid { grid-template-columns: repeat(2, 1fr); }
}
.compare-card {
  padding: 26px;
  border-radius: var(--radius);
  border: 2px solid var(--line);
  background: #fff;
}
.compare-card.alt { border-color: var(--primary); background: var(--paper); }
.compare-tag {
  display: inline-block;
  margin: 0 0 12px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.compare-card.alt .compare-tag { background: var(--primary); color: var(--accent); }
.compare-card p:last-child { margin: 0; color: var(--sub); }

/* ---------- 노출 구분 섹션: 듀오 카드 ---------- */
.exposure-section { padding: 48px 20px; background: var(--paper); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.exposure-section h2 {
  font-size: clamp(1.7rem, 4.4vw, 2.3rem);
  margin: 0 0 18px;
  text-align: center;
}
.exposure-section > .section-inner > p { color: var(--sub); max-width: 52em; margin: 0 auto 32px; text-align: center; }
.exposure-section > .section-inner > p:last-child { margin: 28px auto 0; }

.exposure-duo {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .exposure-duo { grid-template-columns: repeat(2, 1fr); }
}
.exposure-card {
  padding: 28px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  text-align: center;
}
.exposure-icon {
  width: 60px; height: 60px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--primary);
  color: var(--accent);
}
.exposure-icon svg { width: 30px; height: 30px; }
.exposure-card h3 { margin: 0 0 10px; font-size: 1.2rem; color: var(--primary); }
.exposure-card p { margin: 0; color: var(--sub); font-size: 0.96rem; }

/* ---------- 성능 섹션: 배지 로우 ---------- */
.perform-section { padding: 48px 20px; }
.perform-section h2 {
  font-size: clamp(1.7rem, 4.4vw, 2.3rem);
  margin: 0 0 18px;
  text-align: center;
}
.perform-section > .section-inner > p { color: var(--sub); max-width: 52em; margin: 0 auto 16px; text-align: center; }

.perform-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 28px 0;
}
.perform-badge {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  font-size: 0.98rem;
  box-shadow: 0 4px 14px rgba(111, 29, 27, 0.3);
}
.perform-link { color: var(--accent); font-size: 1.3rem; font-weight: 700; }

/* ---------- FAQ ---------- */
.faq-section { padding: 48px 20px; background: var(--paper); border-top: 1px solid var(--line); }
.faq-section h2 {
  font-size: clamp(1.7rem, 4.4vw, 2.3rem);
  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: 56px 20px 64px;
  background: radial-gradient(circle at 50% 0%, rgba(255, 183, 3, 0.25), transparent 60%), var(--primary);
  color: #fff;
  text-align: center;
}
.cta-inner h2 {
  color: #fff;
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  margin: 0 0 12px;
}
.cta-inner p { margin: 0 0 26px; color: #f3ddc9; }
.cta-inner .hero-cta { justify-content: center; }
.cta-inner .btn-primary { background: var(--accent); border-color: var(--accent); color: var(--ink); box-shadow: 0 6px 18px rgba(255, 183, 3, 0.35); }
.cta-inner .btn-primary:hover { background: #ffc733; box-shadow: 0 8px 22px rgba(255, 183, 3, 0.5); }
.cta-inner .btn-ghost { color: #fff; border-color: rgba(255,255,255,0.6); }
.cta-inner .btn-ghost:hover { background: rgba(255,255,255,0.1); }

/* ---------- 푸터 ---------- */
.site-footer {
  background: #2a1210;
  color: #d9beb2;
  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: #d9beb2;
  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: #a98879;
}
.site-footer address a { color: #fff; text-decoration: none; }
.site-footer p { max-width: 1100px; margin: 0 auto; font-size: 0.85rem; color: #8a6a5c; }

/* ---------- 반응형 여백 확장 ---------- */
@media (min-width: 1024px) {
  .zone-section, .compare-section, .exposure-section, .perform-section, .faq-section, .cta-section {
    padding-left: 32px;
    padding-right: 32px;
  }
}
@media (min-width: 1280px) {
  .zone-section, .compare-section, .exposure-section, .perform-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); } }