/* 서울강남바닥코팅전문 — 네이비×골드 어반 커머셜, CSS 스카이라인 실루엣, 슬림 언더라인 버튼 */

:root {
  --navy: #1B263B;
  --navy-2: #263652;
  --navy-3: #0F1626;
  --gold: #FFC300;
  --gold-dim: rgba(255, 195, 0, 0.28);
  --fg: #EDEFF4;
  --muted: #A9B2C4;
  --line: rgba(255, 195, 0, 0.22);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: #F5F6F8;
  color: #1c2436;
  font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Malgun Gothic', sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-text-size-adjust: 100%;
}
a { color: inherit; }
p { margin: 0 0 1em; }
h1, h2 { font-family: 'Stylish', 'Noto Sans KR', sans-serif; font-weight: 400; line-height: 1.3; color: var(--navy); }
h2 { font-size: 1.5rem; margin: 0 0 20px; position: relative; padding-bottom: 14px; }
h2::after { content: ''; position: absolute; left: 0; bottom: 0; width: 56px; height: 3px; background: var(--gold); }
h3 { font-size: 1.05rem; margin: 0; color: var(--navy); font-weight: 700; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.section-inner { max-width: 720px; margin: 0 auto; padding: 48px 20px; }

/* header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--navy); border-bottom: 1px solid var(--gold-dim);
}
.header-inner {
  max-width: 1280px; margin: 0 auto; padding: 14px 20px;
  display: flex; align-items: center; justify-content: space-between;
  position: relative;
}
.logo { font-family: 'Stylish', sans-serif; font-size: 1.2rem; color: #fff; text-decoration: none; letter-spacing: 0.01em; }
.menu-toggle {
  background: none; border: 1px solid var(--gold); border-radius: 0;
  width: 44px; height: 44px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px;
  cursor: pointer;
}
.menu-toggle span { width: 20px; height: 2px; background: var(--gold); display: block; }
#primary-nav {
  display: none; position: absolute; top: 100%; left: 0; right: 0;
  background: var(--navy-2); border-top: 1px solid var(--gold-dim);
  flex-direction: column; padding: 8px 20px 16px;
}
#primary-nav.is-open { display: flex; }
#primary-nav a {
  display: flex; align-items: center; min-height: 44px;
  text-decoration: none; color: var(--fg); border-bottom: 1px solid rgba(255,255,255,0.08);
  font-size: 0.98rem;
}

/* buttons: 슬림 사각 + 골드 언더라인 */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 26px;
  border-radius: 0; text-decoration: none;
  font-family: 'Stylish', sans-serif; font-size: 1rem; letter-spacing: 0.02em;
  position: relative;
}
.btn::after {
  content: ''; position: absolute; left: 14px; right: 14px; bottom: 6px;
  height: 2px; background: var(--gold);
}
.btn-primary { background: var(--gold); color: var(--navy-3); }
.btn-primary::after { display: none; }
.btn-ghost { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,0.5); }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }

/* hero: 다크 네이비 + CSS 스카이라인 실루엣 */
.skyline-hero {
  position: relative;
  background: linear-gradient(180deg, var(--navy-3) 0%, var(--navy) 65%);
  overflow: hidden;
  padding-bottom: 64px;
}
.skyline-shape {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 120px;
  background: var(--navy-2);
  clip-path: polygon(
    0% 100%, 0% 55%, 4% 55%, 4% 30%, 9% 30%, 9% 60%, 14% 60%, 14% 15%, 16% 15%,
    16% 60%, 22% 60%, 22% 40%, 27% 40%, 27% 70%, 33% 70%, 33% 20%, 35% 20%,
    35% 70%, 41% 70%, 41% 45%, 47% 45%, 47% 10%, 49% 10%, 49% 45%, 55% 45%,
    55% 65%, 61% 65%, 61% 25%, 63% 25%, 63% 65%, 69% 65%, 69% 38%, 75% 38%,
    75% 70%, 81% 70%, 81% 18%, 83% 18%, 83% 70%, 89% 70%, 89% 50%, 95% 50%,
    95% 70%, 100% 70%, 100% 100%
  );
  opacity: 0.85;
}
.hero-inner { position: relative; z-index: 1; padding-top: 56px; padding-bottom: 0; text-align: left; }
.eyebrow {
  font-size: 0.78rem; letter-spacing: 0.2em; color: var(--gold);
  margin: 0 0 14px; font-weight: 700; text-transform: uppercase;
}
.skyline-hero h1 { color: #fff; font-size: clamp(1.7rem, 6vw, 2.5rem); margin: 0 0 18px; }
.hero-sub { color: var(--muted); font-size: 1.02rem; max-width: 560px; }

/* content sections */
.content-section { background: #fff; border-bottom: 1px solid var(--line); }
.content-section-alt { background: #F0F2F6; }
.content-section p { color: #38425a; }
.content-section a { color: var(--navy); text-decoration: underline; text-decoration-color: var(--gold); text-underline-offset: 3px; font-weight: 700; }

/* related links */
.related-section { background: #fff; border-bottom: 1px solid var(--line); }
.related-section ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 12px; }
.related-section li { margin: 0; }
.related-section a {
  display: inline-flex; align-items: center; min-height: 40px;
  padding: 10px 22px;
  background: #F5F6F8; border: 1px solid var(--gold-dim);
  color: var(--navy); text-decoration: none; font-weight: 700; font-size: 0.92rem;
  transition: background 0.15s ease, transform 0.15s ease;
}
.related-section a:hover { background: var(--gold-dim); transform: translateY(-2px); }

/* faq / accordion */
.faq-section { background: #fff; border-bottom: 1px solid var(--line); }
.accordion-item { border-bottom: 1px solid var(--line); }
.accordion-trigger {
  width: 100%; text-align: left; min-height: 44px;
  background: none; border: none; color: var(--navy);
  font-size: 1rem; font-weight: 700; padding: 16px 4px;
  cursor: pointer; display: flex; align-items: center; justify-content: space-between;
  font-family: inherit;
}
.accordion-trigger::after { content: '+'; color: var(--gold); font-size: 1.3rem; margin-left: 12px; }
.accordion-trigger[aria-expanded="true"]::after { content: '−'; }
.accordion-panel { padding: 0 4px 18px; }
.accordion-panel p { color: #38425a; margin: 0; }

/* cta */
.cta-section { background: var(--navy); }
.cta-section h2 { color: #fff; }
.cta-section h2::after { background: var(--gold); }
.cta-inner p { color: var(--muted); }

/* footer */
.site-footer { background: var(--navy-3); padding: 16px 20px; }
address {
  max-width: 1120px; margin: 0 auto; font-style: normal; color: var(--muted); font-size: 0.88rem; line-height: 1.8;
}
address a { color: var(--gold); text-decoration: none; }
/* breakpoints */
@media (min-width: 480px) {
  .hero-cta { gap: 18px; }
}
@media (min-width: 768px) {
  #primary-nav { position: static; display: flex !important; flex-direction: row; background: none; border: none; padding: 0; gap: 22px; }
  #primary-nav a { border-bottom: none; min-height: auto; }
  .menu-toggle { display: none; }
  .section-inner { max-width: 760px; padding: 64px 24px; }
  .skyline-hero { padding-bottom: 90px; }
  .skyline-shape { height: 160px; }
  .hero-inner { padding-top: 80px; }
}
@media (min-width: 1024px) {
  .section-inner { max-width: 820px; }
  h2 { font-size: 1.75rem; }
  .skyline-hero h1 { font-size: 2.8rem; }
}
@media (min-width: 1280px) {
  .header-inner { max-width: 1280px; }
  .skyline-shape { height: 190px; }
}

/* 현장 사진 */
.site-photo-section { max-width: 1000px; margin: 0 auto; padding: 40px 20px; }
.site-photo-section h2 { color: var(--gold); 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; border: 1px solid var(--gold-dim); }
.site-photo-grid img { width: 100%; height: 100%; object-fit: cover; }
@media (min-width: 640px) { .site-photo-grid { grid-template-columns: repeat(2, 1fr); } }