/* ==============================================================
   비에스일렉트릭 주식회사 (BSELECTRIC CO., LTD.)
   세련·미니멀·정적 — 클린에너지 / ESCO 컨설팅
   ============================================================== */

/* ── Reset ── */
*,*::before,*::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Pretendard',-apple-system,BlinkMacSystemFont,'Apple SD Gothic Neo','Malgun Gothic',sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #1a2332;
  background: #ffffff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  letter-spacing: -0.005em;
  word-break: keep-all;
  overflow-wrap: break-word;
}
/* 키보드 사용자를 위한 깔끔한 포커스 */
:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
  border-radius: 2px;
}
::selection { background: var(--navy); color: #fff; }
@font-face { font-family:'Pretendard'; font-weight:400; font-display:swap;
  src:url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/woff2/Pretendard-Regular.woff2') format('woff2'); }
@font-face { font-family:'Pretendard'; font-weight:500; font-display:swap;
  src:url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/woff2/Pretendard-Medium.woff2') format('woff2'); }
@font-face { font-family:'Pretendard'; font-weight:600; font-display:swap;
  src:url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/woff2/Pretendard-SemiBold.woff2') format('woff2'); }
@font-face { font-family:'Pretendard'; font-weight:700; font-display:swap;
  src:url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/woff2/Pretendard-Bold.woff2') format('woff2'); }

img { max-width:100%; height:auto; display:block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

/* ── Tokens ── */
:root {
  --navy:        #0a2240;
  --navy-deep:   #061730;
  --navy-soft:   #1d3557;
  --blue:        #1e6bd8;
  --blue-soft:   #4a8ae0;
  --gray-900:    #0f172a;
  --gray-700:    #334155;
  --gray-500:    #64748b;
  --gray-300:    #cbd5e1;
  --gray-200:    #e2e8f0;
  --gray-100:    #f1f5f9;
  --gray-50:     #f8fafc;
  --bg:          #ffffff;
  --max:         1180px;
  --radius:      4px;
  --transition:  cubic-bezier(.4,0,.2,1);
}

/* ── Layout ── */
.container { max-width: var(--max); margin: 0 auto; padding: 0 32px; }
.section   { padding: 120px 0; }
.section-tight { padding: 80px 0; }
@media (max-width: 768px) {
  .container { padding: 0 24px; }
  .section { padding: 72px 0; }
}

/* ── Typography ── */
/* 한글 줄바꿈 최적화: 단어 단위 보존 + 균형 잡힌 줄바꿈 */
h1,h2,h3,h4 {
  color: var(--gray-900);
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 20px;
  letter-spacing: -0.02em;
  word-break: keep-all;
  overflow-wrap: break-word;
  text-wrap: balance;
}
h1 { font-size: clamp(2rem, 4.2vw, 3.25rem); font-weight: 700; line-height: 1.25; }
h2 { font-size: clamp(1.625rem, 3.0vw, 2.375rem); }
h3 { font-size: 1.375rem; font-weight: 600; }
h4 { font-size: 1.05rem; font-weight: 600; }
p  {
  margin: 0 0 16px;
  color: var(--gray-700);
  word-break: keep-all;
  overflow-wrap: break-word;
}
.lead { font-size: 1.125rem; color: var(--gray-500); line-height: 1.7; text-wrap: pretty; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--blue);
  text-transform: uppercase;
  margin-bottom: 20px;
  word-break: keep-all;
}
.eyebrow::before {
  content: '';
  display: inline-block;
  width: 22px;
  height: 1px;
  background: currentColor;
  opacity: 0.5;
}
.section-head {
  max-width: 720px;
  margin: 0 auto 64px;
  text-align: center;
}
.section-head.left { text-align: left; margin-left: 0; }
.section-head h2 { margin-bottom: 16px; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  transition: background-color 0.25s var(--transition),
              border-color 0.25s var(--transition),
              color 0.25s var(--transition),
              transform 0.2s var(--transition),
              box-shadow 0.25s var(--transition);
  cursor: pointer;
  letter-spacing: -0.005em;
  word-break: keep-all;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover {
  background: var(--navy-deep);
  box-shadow: 0 8px 20px -8px rgba(10, 34, 64, 0.35);
  transform: translateY(-1px);
}
.btn-ghost { background: transparent; color: var(--navy); border-color: var(--gray-300); }
.btn-ghost:hover { border-color: var(--navy); background: var(--gray-50); }
.btn-outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,0.4); }
.btn-outline-light:hover { background: rgba(255,255,255,0.1); border-color: #fff; }
.btn .arrow { transition: transform 0.25s var(--transition); display: inline-block; }
.btn:hover .arrow { transform: translateX(4px); }

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #ffffff;
  border-bottom: 1px solid var(--gray-100);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo img { height: 36px; }
.logo-text-ko {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  border-left: 1px solid var(--gray-300);
  padding-left: 12px;
  margin-left: 4px;
}
.nav-links {
  display: flex;
  gap: 44px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--gray-700);
  position: relative;
  padding: 10px 0;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--navy); }
.nav-links a.active { color: var(--navy); font-weight: 600; }
.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--navy);
}
.nav-toggle {
  display: none;
  background: none;
  border: 0;
  width: 40px; height: 40px;
  flex-direction: column; justify-content: center; align-items: center; gap: 5px;
}
.nav-toggle span { display:block; width:22px; height:1.5px; background: var(--navy); }

/* ── Hero ── */
.hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
  padding: 100px 0;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(110deg,
      rgba(6,23,48,0.92) 0%,
      rgba(10,34,64,0.78) 45%,
      rgba(10,34,64,0.45) 80%,
      rgba(10,34,64,0.25) 100%),
    url('https://images.unsplash.com/photo-1509391366360-2e959784a276?w=2000&q=80') center/cover;
  z-index: 0;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(6,23,48,0.4) 100%);
}
.hero-inner { position: relative; z-index: 2; max-width: 760px; }
.hero h1 {
  color: #fff;
  margin-bottom: 28px;
  font-size: clamp(1.85rem, 4.5vw, 3.25rem);
  line-height: 1.25;
  text-wrap: balance;
  word-break: keep-all;
  letter-spacing: -0.025em;
}
.hero .eyebrow { color: #93c5fd; }
.hero p {
  color: rgba(255,255,255,0.88);
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  max-width: 580px;
  margin-bottom: 40px;
  text-wrap: pretty;
  word-break: keep-all;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-meta {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 40px;
  margin-top: 80px;
  padding-top: 36px;
  border-top: 1px solid rgba(255,255,255,0.18);
}
.hero-meta dt { font-size: 0.78rem; color: rgba(255,255,255,0.6); margin-bottom: 6px; letter-spacing: 0.1em; text-transform: uppercase; }
.hero-meta dd { margin: 0; color: #fff; font-weight: 600; font-size: 1.05rem; }

/* ── Page header (sub) ── */
.page-header {
  background: var(--navy);
  color: #fff;
  padding: 96px 0;
  position: relative;
  overflow: hidden;
}
.page-header::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 90% 20%, rgba(74,138,224,0.18), transparent 50%);
  pointer-events: none;
}
.page-header .container { position: relative; z-index: 1; }
.page-header h1 { color: #fff; margin-bottom: 14px; font-size: clamp(1.875rem, 3.5vw, 2.75rem); letter-spacing: -0.025em; }
.page-header p { color: rgba(255,255,255,0.72); margin: 0; font-size: 1.05rem; max-width: 620px; }
.breadcrumb {
  display: inline-flex;
  gap: 10px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.5);
  margin-top: 20px;
}
.breadcrumb a:hover { color: #fff; }

/* ── Generic Grids ── */
.grid { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(360px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

/* ── Feature cards (minimal) ── */
.feature {
  padding: 36px 30px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  background: #fff;
  transition: border-color 0.25s var(--transition),
              transform 0.25s var(--transition),
              box-shadow 0.25s var(--transition);
  position: relative;
  overflow: hidden;
}
.feature::before {
  content: '';
  position: absolute;
  left: 0; top: 0;
  width: 0;
  height: 2px;
  background: var(--blue);
  transition: width 0.35s var(--transition);
}
.feature:hover {
  border-color: var(--navy);
  transform: translateY(-3px);
  box-shadow: 0 12px 28px -16px rgba(10, 34, 64, 0.18);
}
.feature:hover::before { width: 100%; }
.feature-num {
  font-family: 'Pretendard', sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--blue);
  margin-bottom: 16px;
}
.feature h3 { margin-bottom: 12px; }
.feature p { font-size: 0.95rem; color: var(--gray-500); margin: 0; line-height: 1.65; }

/* ── Service detail rows (alternating) ── */
.svc-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  padding: 64px 0;
  border-top: 1px solid var(--gray-200);
}
.svc-row:first-child { border-top: 0; padding-top: 0; }
.svc-row.reverse .svc-text  { order: 2; }
.svc-row.reverse .svc-image { order: 1; }
.svc-image {
  aspect-ratio: 4/3;
  background: var(--gray-100);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}
.svc-image img { width: 100%; height: 100%; object-fit: cover; }
.svc-text .svc-num {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--blue);
  margin-bottom: 14px;
}
.svc-text h3 { font-size: 1.625rem; margin-bottom: 16px; }
.svc-text ul {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}
.svc-text ul li {
  position: relative;
  padding: 8px 0 8px 24px;
  color: var(--gray-700);
  font-size: 0.95rem;
  border-top: 1px solid var(--gray-100);
}
.svc-text ul li:first-child { border-top: 0; }
.svc-text ul li::before {
  content: '';
  position: absolute;
  left: 0; top: 18px;
  width: 12px; height: 1px;
  background: var(--blue);
}

/* ── Stats strip ── */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0;
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
}
.stats > div {
  padding: 40px 28px;
  border-left: 1px solid var(--gray-200);
}
.stats > div:first-child { border-left: 0; }
.stat-num { font-size: 2rem; font-weight: 700; color: var(--navy); letter-spacing: -0.02em; line-height: 1; margin-bottom: 8px; }
.stat-label { font-size: 0.85rem; color: var(--gray-500); }

/* ── Project cards ── */
.proj-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 28px; }
.proj {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  transition: border-color 0.25s, transform 0.25s;
}
.proj:hover { border-color: var(--navy); transform: translateY(-3px); }
.proj-thumb {
  aspect-ratio: 4/3;
  position: relative;
  background: var(--gray-100);
  overflow: hidden;
}
.proj-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.proj:hover .proj-thumb img { transform: scale(1.04); }
.proj-tag {
  position: absolute;
  top: 16px; left: 16px;
  background: rgba(255,255,255,0.95);
  color: var(--navy);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 6px 12px;
  border-radius: 2px;
}
.proj-body { padding: 24px 26px 28px; }
.proj-body h4 { margin: 0 0 6px; font-size: 1.05rem; }
.proj-meta { font-size: 0.85rem; color: var(--gray-500); margin: 0; }

/* ── Project Table ── */
.tbl-wrap { overflow-x: auto; }
table.records {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
table.records th {
  text-align: left;
  padding: 16px 18px;
  font-weight: 600;
  color: var(--gray-900);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-bottom: 2px solid var(--navy);
  background: #fff;
}
table.records td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--gray-200);
  color: var(--gray-700);
}
table.records tr:hover td { background: var(--gray-50); }

/* ── Quote / CEO message ── */
.quote {
  border-left: 3px solid var(--blue);
  padding: 8px 0 8px 24px;
  margin: 32px 0;
  font-size: 1.05rem;
  color: var(--gray-700);
  font-style: normal;
}

/* ── Split section ── */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.split-image {
  aspect-ratio: 4/5;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--gray-100);
}
.split-image img { width: 100%; height: 100%; object-fit: cover; }

/* ── CTA Banner ── */
.cta {
  background: var(--navy);
  color: #fff;
  padding: 96px 0;
  text-align: center;
}
.cta h2 { color: #fff; margin-bottom: 14px; }
.cta p { color: rgba(255,255,255,0.75); max-width: 540px; margin: 0 auto 32px; }
.cta-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Footer ── */
.site-footer {
  background: var(--navy-deep);
  color: rgba(255,255,255,0.65);
  padding: 80px 0 32px;
  font-size: 0.9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 64px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand img {
  height: 32px;
  margin-bottom: 20px;
  opacity: 0.95;
}
.footer-brand p { color: rgba(255,255,255,0.55); font-size: 0.875rem; line-height: 1.7; max-width: 380px; }
.footer-grid h5 {
  color: #fff;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin: 0 0 18px;
}
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid ul li { margin-bottom: 10px; line-height: 1.6; }
.footer-grid ul a:hover { color: #fff; }
.footer-bottom {
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

/* ── 반응형 줄바꿈 헬퍼 ── */
/* 좁은 화면에서는 br 무시 (자동 줄바꿈에 맡김) */
@media (max-width: 640px) {
  .br-md { display: none; }
}

/* ── Mobile ── */
@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex;
    position: absolute;
    top: 80px; left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    padding: 20px 24px;
    gap: 12px;
    border-bottom: 1px solid var(--gray-100);
    box-shadow: 0 12px 30px rgba(0,0,0,0.06);
  }
  .svc-row { grid-template-columns: 1fr; gap: 32px; padding: 48px 0; }
  .svc-row.reverse .svc-text { order: 1; }
  .svc-row.reverse .svc-image { order: 0; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .split-image { aspect-ratio: 4/3; max-width: 480px; margin: 0 auto; }
  .stats > div { border-left: 0; border-top: 1px solid var(--gray-200); }
  .stats > div:first-child { border-top: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .logo-text-ko { display: none; }
  .hero-meta { gap: 24px; margin-top: 56px; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}