/* ==============================
   ㈜신우산업 홈페이지 — 디자인 토큰
   ============================== */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;700;900&display=swap');

:root {
  --primary: #1a365d;
  --primary-light: #2c5282;
  --primary-dark: #102542;
  --accent: #e53e3e;
  --accent-gold: #d69e2e;
  --gray-50: #f7fafc;
  --gray-100: #edf2f7;
  --gray-200: #e2e8f0;
  --gray-400: #a0aec0;
  --gray-600: #718096;
  --gray-700: #4a5568;
  --gray-800: #2d3748;
  --gray-900: #1a202c;
  --text-base: #1f2937;
  --max-w: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans KR', -apple-system, "Apple SD Gothic Neo", sans-serif;
  color: var(--text-base);
  line-height: 1.7;
  background: #fff;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

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

/* ==============================
   헤더
   ============================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--gray-200);
}
.site-header .inner {
  display: flex;
  align-items: center;
  height: 64px;
  padding: 0 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 900;
  color: var(--primary);
  letter-spacing: -0.5px;
}
.logo-img {
  height: 40px;
  width: auto;
  object-fit: contain;
  border-radius: 4px;
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.logo small {
  font-size: 10px;
  font-weight: 500;
  color: var(--gray-600);
  letter-spacing: 1px;
  text-transform: uppercase;
}
.nav {
  margin-left: auto;
  display: flex;
  gap: 28px;
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-700);
  align-items: center;
}
.nav a:hover { color: var(--primary); }
.nav .cta {
  background: var(--accent);
  color: #fff;
  padding: 8px 16px;
  border-radius: 4px;
  font-weight: 700;
  transition: background 0.2s;
}
.nav .cta:hover { background: #c53030; color: #fff; }
.menu-toggle { display: none; }

/* ==============================
   히어로
   ============================== */
.hero {
  position: relative;
  min-height: 560px;
  background: #1a202c;
  color: #fff;
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}
/* 배경 슬라이드 트랙 (z축 가장 아래) */
.hero-bg-track {
  position: absolute; inset: 0;
  z-index: 0;
  pointer-events: none;
}
.hero-bg-slide {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0;
  transform: scale(1.05);
  animation: heroBgCycle 36s infinite;
  will-change: opacity, transform;
}
.hero-bg-slide:nth-child(1) { animation-delay: 0s; }
.hero-bg-slide:nth-child(2) { animation-delay: 6s; }
.hero-bg-slide:nth-child(3) { animation-delay: 12s; }
.hero-bg-slide:nth-child(4) { animation-delay: 18s; }
.hero-bg-slide:nth-child(5) { animation-delay: 24s; }
.hero-bg-slide:nth-child(6) { animation-delay: 30s; }
@keyframes heroBgCycle {
  0%   { opacity: 0; transform: scale(1.05); }
  2%   { opacity: 1; }
  13.9%{ opacity: 1; transform: scale(1.0); }
  16.7%{ opacity: 0; transform: scale(1.0); }
  100% { opacity: 0; transform: scale(1.05); }
}
/* 옅은 오버레이 — 이미지가 충분히 보이게, 텍스트 가독성은 text-shadow로 보강 */
.hero-bg-overlay {
  position: absolute; inset: 0;
  z-index: 1;
  background:
    radial-gradient(ellipse at center, rgba(10, 18, 38, 0.20) 0%, rgba(10, 18, 38, 0.55) 95%),
    linear-gradient(180deg, rgba(10, 18, 38, 0.30) 0%, rgba(10, 18, 38, 0.40) 100%);
  pointer-events: none;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 2;
  background: radial-gradient(ellipse at 30% 80%, rgba(255,255,255,0.08), transparent 50%);
  pointer-events: none;
}
.hero .inner {
  position: relative;
  z-index: 3;
  text-align: center;
  width: 100%;
  padding: 80px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}
@media (prefers-reduced-motion: reduce) {
  .hero-bg-slide { animation: none; }
  .hero-bg-slide:first-child { opacity: 1; transform: none; }
}
.hero .eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 4px;
  padding: 6px 16px;
  border: 1px solid rgba(255,255,255,0.45);
  border-radius: 30px;
  margin-bottom: 28px;
  color: #fff;
  background: rgba(10, 18, 38, 0.35);
  backdrop-filter: blur(2px);
  text-shadow: 0 1px 4px rgba(0,0,0,0.6);
}
.hero h1 {
  font-size: 48px;
  font-weight: 900;
  letter-spacing: -1px;
  line-height: 1.2;
  margin-bottom: 20px;
  text-shadow:
    0 0 18px rgba(0,0,0,0.95),
    0 2px 6px rgba(0,0,0,0.9),
    0 1px 2px rgba(0,0,0,0.95);
}
.hero .lead {
  font-size: 18px;
  font-weight: 500;
  color: #fff;
  max-width: 640px;
  margin: 0 auto 36px;
  text-shadow:
    0 0 14px rgba(0,0,0,0.95),
    0 1px 4px rgba(0,0,0,0.9);
}
.hero-stats {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 16px;
}
.hero-stats div {
  /* 어두운 배경 슬라이드와 명확히 분리 — 밝은 흰색 카드 */
  background: rgba(255, 255, 255, 0.96);
  border: 2px solid var(--accent-gold);
  backdrop-filter: blur(4px);
  padding: 16px 22px 14px;
  border-radius: 8px;
  text-align: center;
  min-width: 130px;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.4),
    0 12px 32px rgba(0, 0, 0, 0.55);
}
.hero-stats strong {
  display: block;
  font-size: 24px;
  font-weight: 900;
  color: var(--primary);
  margin-bottom: 4px;
  text-shadow: none;
}
.hero-stats span {
  font-size: 13px;
  font-weight: 700;
  color: var(--gray-700);
  letter-spacing: 0.3px;
  text-shadow: none;
}
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  padding: 14px 32px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 700;
  margin-right: 8px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.hero-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(229, 62, 62, 0.4); }
.hero-cta-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1.5px solid rgba(255,255,255,0.4);
  color: #fff;
  padding: 14px 26px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
}
.hero-cta-ghost:hover { background: rgba(255,255,255,0.1); color: #fff; }

/* ==============================
   섹션 공통
   ============================== */
section { padding: 80px 0; }
section h2.section-title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 8px;
  color: var(--primary);
}
section .section-sub {
  font-size: 15px;
  color: var(--gray-600);
  margin-bottom: 40px;
}
section .section-head {
  text-align: center;
  margin-bottom: 48px;
}
section .section-head h2 { display: inline-block; padding: 0 12px; border-left: 4px solid var(--accent); border-right: 4px solid var(--accent); }

/* 연혁 (timeline) — 좌측 컬럼 컴팩트 */
.history-block {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  padding: 28px 24px;
}
.history-title {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--gray-600);
  margin-bottom: 22px;
  text-transform: uppercase;
}
.timeline {
  list-style: none;
  padding: 0;
  position: relative;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 50px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: var(--gray-200);
}
.timeline li {
  display: flex;
  gap: 18px;
  margin-bottom: 18px;
  position: relative;
}
.timeline li:last-child { margin-bottom: 0; }
.timeline .year {
  width: 42px;
  flex-shrink: 0;
  font-size: 14px;
  font-weight: 800;
  color: var(--primary);
  text-align: right;
  padding-top: 1px;
}
.timeline li::before {
  content: '';
  position: absolute;
  left: 46px;
  top: 6px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px #fff, 0 0 0 4px var(--gray-200);
  z-index: 1;
}
.timeline .milestone {
  padding-left: 14px;
  flex: 1;
}
.timeline .milestone strong {
  display: block;
  font-size: 14px;
  color: var(--gray-900);
  margin-bottom: 2px;
}
.timeline .milestone p {
  font-size: 12px;
  color: var(--gray-600);
  line-height: 1.5;
}

/* 사업영역 */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.biz-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s;
}
.biz-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.08);
  border-color: var(--primary);
}
.biz-card .img {
  height: 200px;
  background: linear-gradient(135deg, var(--primary), var(--gray-800));
  position: relative;
  overflow: hidden;
}
.biz-card .img img { width: 100%; height: 100%; object-fit: cover; }
.biz-card .body { padding: 22px; }
.biz-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--primary);
}
.biz-card .spec {
  display: inline-block;
  font-size: 11px;
  background: var(--gray-100);
  color: var(--gray-700);
  padding: 4px 10px;
  border-radius: 12px;
  margin-bottom: 10px;
  font-weight: 600;
}
.biz-card p { font-size: 14px; color: var(--gray-700); line-height: 1.7; }

/* 강점/숫자 섹션 */
.about-section { background: var(--gray-50); }
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-text h2 {
  font-size: 30px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.about-text p {
  font-size: 15px;
  color: var(--gray-700);
  margin-bottom: 12px;
}
.about-numbers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.about-numbers div {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-left: 3px solid var(--accent);
  padding: 24px 22px;
  border-radius: 6px;
}
.about-numbers strong {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
}
.about-numbers span { font-size: 13px; color: var(--gray-600); }

/* 포트폴리오 */
.portfolio-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  grid-template-rows: 240px 240px;
  gap: 12px;
}
.portfolio-grid > a {
  background: var(--gray-200) center/cover no-repeat;
  border-radius: 6px;
  overflow: hidden;
  position: relative;
  transition: transform 0.25s;
}
.portfolio-grid > a:first-child { grid-row: span 2; }
.portfolio-grid > a:hover { transform: scale(0.99); }
.portfolio-grid > a::after {
  content: attr(data-label);
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 14px 16px;
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  color: #fff;
  font-size: 13px;
  font-weight: 600;
}
.portfolio-more {
  text-align: center;
  margin-top: 28px;
}
.portfolio-more a {
  display: inline-block;
  border: 1.5px solid var(--primary);
  color: var(--primary);
  padding: 10px 26px;
  border-radius: 4px;
  font-weight: 600;
  font-size: 14px;
  transition: background 0.2s;
}
.portfolio-more a:hover { background: var(--primary); color: #fff; }

/* 오시는 길 */
.location-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1.3fr;
  gap: 24px;
  align-items: stretch;
}
.location-info {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  padding: 32px;
}
.location-info h3 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--gray-600);
  margin-bottom: 6px;
}
.location-info h3:not(:first-child) { margin-top: 22px; }
.location-info p {
  font-size: 16px;
  color: var(--gray-800);
  line-height: 1.6;
}
.location-info .addr {
  font-size: 17px;
  font-weight: 600;
  color: var(--primary);
}
.location-info p strong { font-size: 18px; color: var(--primary); }
.location-info .contact-list { list-style: none; padding: 0; }
.location-info .contact-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 0;
  font-size: 16px;
  color: var(--gray-800);
}
.location-info .contact-list .lbl {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-width: 84px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--gray-600);
  background: var(--gray-100);
  padding: 5px 10px;
  border-radius: 4px;
}
.location-info .contact-list .lbl svg {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
}
.location-info .contact-list .val {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
}
.location-info .map-link {
  display: inline-block;
  margin-top: 24px;
  background: var(--primary);
  color: #fff;
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
}
.location-info .map-link:hover { background: var(--primary-dark); }
.location-map {
  border-radius: 8px;
  overflow: hidden;
  min-height: 360px;
  background: var(--gray-200);
}
@media (max-width: 1024px) {
  .location-grid { grid-template-columns: 1fr 1fr; }
  .location-map { grid-column: span 2; min-height: 320px; }
}
@media (max-width: 768px) {
  .location-grid { grid-template-columns: 1fr; }
  .location-map { grid-column: auto; height: 280px; min-height: 280px; }
}

/* CTA 섹션 */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--gray-800) 100%);
  color: #fff;
  text-align: center;
  padding: 80px 24px;
}
.cta-section h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 12px;
  color: #fff;
}
.cta-section p {
  font-size: 15px;
  color: rgba(255,255,255,0.85);
  margin-bottom: 28px;
}
.cta-section .buttons { display: inline-flex; gap: 12px; }

/* 푸터 */
.site-footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: 60px 0 28px;
  font-size: 13px;
}
.site-footer .grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.site-footer h4 {
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 14px;
}
.site-footer ul { list-style: none; }
.site-footer ul li { margin-bottom: 8px; }
.site-footer ul a:hover { color: #fff; }
.site-footer .copyright {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--gray-600);
}

/* ==============================
   반응형
   ============================== */
@media (max-width: 768px) {
  .nav { display: none; }
  .menu-toggle { display: block; margin-left: auto; background: transparent; border: none; padding: 8px; }
  .hero h1 { font-size: 32px; }
  .hero .lead { font-size: 15px; }
  .hero-stats { gap: 12px; }
  .hero-stats div { padding: 10px 14px; min-width: 100px; }
  section { padding: 56px 0; }
  section h2.section-title { font-size: 24px; }
  .biz-grid, .about-grid, .portfolio-grid { grid-template-columns: 1fr; grid-template-rows: auto; }
  .portfolio-grid > a { grid-row: auto !important; height: 200px; }
  .site-footer .grid { grid-template-columns: 1fr; gap: 24px; }
  .site-footer .copyright { flex-direction: column; gap: 8px; }
}