/* ============================================
   United Engineering Co., Ltd. — Site Stylesheet
   ============================================ */

:root {
  --color-primary: #10179b;
  --color-primary-dark: #0a0f66;
  --color-primary-light: #3742c4;
  --color-accent: #f2a900;
  --color-accent-dark: #c98600;
  --color-ink: #171a2b;
  --color-body: #4b4f63;
  --color-muted: #7a7e93;
  --color-line: #e4e5ef;
  --color-surface: #ffffff;
  --color-surface-alt: #f5f6fb;
  --color-navy-surface: #0c1152;
  --max-width: 1180px;
  --radius: 10px;
  --shadow-sm: 0 2px 10px rgba(16, 23, 155, 0.06);
  --shadow-md: 0 12px 32px rgba(10, 15, 50, 0.12);
  --transition: 0.25s ease;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Pretendard", Roboto, sans-serif;
  color: var(--color-body);
  background: var(--color-surface);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  color: var(--color-ink);
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 0.6em;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.1rem, 4vw, 3.1rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); }
h3 { font-size: 1.3rem; }

p { margin: 0 0 1em; }

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

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--color-accent);
  display: inline-block;
}

.section { padding: 84px 0; }
.section-tight { padding: 56px 0; }
.section-alt { background: var(--color-surface-alt); }

.section-head { max-width: 680px; margin-bottom: 48px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head p { color: var(--color-muted); font-size: 1.05rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition), color var(--transition);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--color-accent); color: #1a1300; box-shadow: 0 8px 20px rgba(242, 169, 0, 0.35); }
.btn-primary:hover { background: var(--color-accent-dark); }
.btn-outline { background: transparent; border-color: rgba(255,255,255,0.55); color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,0.12); }
.btn-dark { background: var(--color-primary); color: #fff; }
.btn-dark:hover { background: var(--color-primary-dark); }
.btn-ghost { background: transparent; border-color: var(--color-line); color: var(--color-primary); }
.btn-ghost:hover { background: var(--color-surface-alt); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-line);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { height: 32px; width: auto; }

.nav-desktop { display: flex; align-items: center; gap: 8px; }
.nav-desktop a {
  padding: 10px 16px;
  font-weight: 600;
  font-size: 0.94rem;
  color: var(--color-ink);
  border-radius: 999px;
  transition: background var(--transition), color var(--transition);
}
.nav-desktop a:hover { background: var(--color-surface-alt); color: var(--color-primary); }
.nav-desktop a.active { color: var(--color-primary); background: #eceeff; }

.header-actions { display: flex; align-items: center; gap: 14px; }
.header-phone { font-weight: 700; color: var(--color-primary); font-size: 0.95rem; display: flex; align-items: center; gap: 6px; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-ink);
  margin: 5px 0;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-mobile {
  display: none;
  flex-direction: column;
  padding: 8px 24px 20px;
  border-top: 1px solid var(--color-line);
  background: #fff;
}
.nav-mobile a {
  padding: 13px 4px;
  font-weight: 600;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-ink);
}
.nav-mobile a.active { color: var(--color-primary); }

@media (max-width: 880px) {
  .nav-desktop { display: none; }
  .header-phone { display: none; }
  .nav-toggle { display: block; }
  body.nav-open .nav-mobile { display: flex; }
}

/* ---------- Hero (page-level) ---------- */
.hero {
  position: relative;
  color: #fff;
  padding: 140px 0 100px;
  background: linear-gradient(120deg, rgba(9,13,80,0.94) 0%, rgba(16,23,155,0.88) 55%, rgba(9,13,80,0.92) 100%), var(--color-navy-surface);
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.hero.has-image { background-blend-mode: multiply; }
.hero .container { position: relative; z-index: 2; }
.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.hero-video-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(120deg, rgba(9,13,80,0.94) 0%, rgba(16,23,155,0.86) 55%, rgba(9,13,80,0.92) 100%);
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #ffd482;
  margin-bottom: 18px;
}
.hero h1 { color: #fff; max-width: 780px; }
.hero-sub { font-size: 1.15rem; color: rgba(255,255,255,0.82); max-width: 620px; margin-bottom: 34px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-page { padding: 116px 0 64px; }
.hero-page h1 { max-width: 700px; }
.hero-page .hero-sub { margin-bottom: 0; }

/* breadcrumb */
.crumb { font-size: 0.85rem; color: rgba(255,255,255,0.65); margin-bottom: 18px; }
.crumb span { color: #fff; }

/* ---------- Stats strip ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: -56px;
  position: relative;
  z-index: 3;
}
.stat-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 26px 22px;
  text-align: center;
}
.stat-card .num { font-size: 1.9rem; font-weight: 800; color: var(--color-primary); letter-spacing: -0.02em; }
.stat-card .label { font-size: 0.85rem; color: var(--color-muted); margin-top: 4px; }

@media (max-width: 880px) {
  .stats { grid-template-columns: repeat(2, 1fr); margin-top: -36px; }
}

/* ---------- Cards / Grids ---------- */
.grid { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.card {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card-body { padding: 26px 24px; }
.card .card-icon {
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  background: #eceeff; color: var(--color-primary);
  border-radius: 12px; margin-bottom: 16px;
}
.card h3 { margin-bottom: 8px; font-size: 1.15rem; }
.card p { color: var(--color-muted); font-size: 0.95rem; margin-bottom: 0; }
.card .card-media { aspect-ratio: 4/3; overflow: hidden; }
.card .card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.card:hover .card-media img { transform: scale(1.06); }
.card-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 14px; font-weight: 700; color: var(--color-primary); font-size: 0.9rem; }

/* Business quicklinks on home */
.quick-card {
  background: var(--color-surface-alt);
  border-radius: var(--radius);
  padding: 30px 24px;
  border: 1px solid var(--color-line);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  height: 100%;
}
.quick-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
.quick-card .card-icon { background: #fff; }

/* ---------- Two-column feature (image + text) ---------- */
.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.feature.reverse .feature-media { order: 2; }
.feature-media img { border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.feature-list { list-style: none; padding: 0; margin: 18px 0 0; }
.feature-list li {
  display: flex;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 0.98rem;
  color: var(--color-body);
}
.feature-list li:last-child { border-bottom: none; }
.feature-list li .dot {
  flex-shrink: 0;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--color-accent);
  margin-top: 8px;
}

@media (max-width: 880px) {
  .feature { grid-template-columns: 1fr; gap: 32px; }
  .feature.reverse .feature-media { order: 0; }
}

/* ---------- Business detail blocks ---------- */
.equip-block {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: center;
  padding: 56px 0;
  border-bottom: 1px solid var(--color-line);
}
.equip-block:last-child { border-bottom: none; }
.equip-block.reverse { grid-template-columns: 1.1fr 0.9fr; }
.equip-block.reverse .equip-media { order: 2; }
.equip-media img { border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.equip-index { font-size: 0.8rem; font-weight: 700; letter-spacing: 0.1em; color: var(--color-accent-dark); margin-bottom: 10px; text-transform: uppercase; }

@media (max-width: 880px) {
  .equip-block, .equip-block.reverse { grid-template-columns: 1fr; gap: 26px; }
  .equip-block.reverse .equip-media { order: 0; }
}

/* ---------- Process / service list ---------- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
@media (max-width: 880px) { .process-grid { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 560px) { .process-grid { grid-template-columns: 1fr; } }

.process-item {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}
.process-item .step-num {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--color-accent-dark);
  letter-spacing: 0.08em;
}
.process-item h3 { font-size: 1.02rem; margin: 8px 0 6px; }
.process-item p { font-size: 0.9rem; color: var(--color-muted); margin: 0; }

/* ---------- Org chart ---------- */
.org-chart { display: flex; flex-direction: column; align-items: center; gap: 0; }
.org-node {
  background: var(--color-primary);
  color: #fff;
  padding: 14px 26px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: var(--shadow-sm);
}
.org-node.sub { background: #fff; border: 1.5px solid var(--color-primary); color: var(--color-primary); }
.org-connector { width: 2px; height: 26px; background: var(--color-line); }
.org-row {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: center;
  position: relative;
  padding-top: 26px;
}
.org-row::before {
  content: "";
  position: absolute;
  top: 0; left: 12%; right: 12%;
  height: 2px;
  background: var(--color-line);
}
.org-row .org-branch { display:flex; flex-direction:column; align-items:center; position:relative; }
.org-row .org-branch::before {
  content:"";
  position:absolute;
  top:-26px; left:50%;
  width:2px; height:26px;
  background: var(--color-line);
}

/* ---------- Reference / country cards ---------- */
.ref-card {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 40px;
  box-shadow: var(--shadow-sm);
}
.ref-card img { width: 100%; }
.ref-card-body { padding: 30px 32px; }
.ref-tag {
  display: inline-block;
  background: #eceeff;
  color: var(--color-primary);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.ref-card h3 { font-size: 1.35rem; margin-bottom: 6px; }
.ref-meta { color: var(--color-muted); font-size: 0.92rem; margin-bottom: 14px; }
.ref-desc-list { list-style: none; padding: 0; margin: 0; }
.ref-desc-list li {
  padding: 8px 0 8px 22px;
  position: relative;
  font-size: 0.95rem;
  border-top: 1px solid var(--color-line);
}
.ref-desc-list li:first-child { border-top: none; }
.ref-desc-list li::before {
  content: "→";
  position: absolute; left: 0; top: 8px;
  color: var(--color-accent-dark);
  font-weight: 700;
}

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--color-primary) 0%, var(--color-navy-surface) 100%);
  color: #fff;
  border-radius: 20px;
  padding: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}
.cta-band h2 { color: #fff; margin-bottom: 6px; }
.cta-band p { color: rgba(255,255,255,0.78); margin-bottom: 0; }

/* ---------- Contact page ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
}
@media (max-width: 880px) { .contact-grid { grid-template-columns: 1fr; } }

.contact-info-item {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-line);
}
.contact-info-item:last-child { border-bottom: none; }
.contact-info-item .icon {
  width: 44px; height: 44px; border-radius: 10px;
  background: #eceeff; color: var(--color-primary);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.contact-info-item h4 { margin: 0 0 4px; font-size: 1rem; }
.contact-info-item p { margin: 0; color: var(--color-muted); font-size: 0.95rem; }

.form-card {
  background: var(--color-surface-alt);
  border-radius: var(--radius);
  padding: 34px;
  border: 1px solid var(--color-line);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }
.form-field label { display: block; font-size: 0.85rem; font-weight: 700; color: var(--color-ink); margin-bottom: 6px; }
.form-field input, .form-field textarea, .form-field select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  background: #fff;
  transition: border-color var(--transition);
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus {
  outline: none; border-color: var(--color-primary);
}
.form-note { font-size: 0.82rem; color: var(--color-muted); margin-top: 14px; }

.map-embed {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-line);
  margin-top: 24px;
}
.map-embed iframe { width: 100%; height: 320px; border: 0; display: block; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-navy-surface);
  color: rgba(255,255,255,0.72);
  padding: 64px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-brand img { height: 30px; margin-bottom: 14px; filter: brightness(0) invert(1); }
.footer-brand p { font-size: 0.9rem; max-width: 320px; }
.site-footer h4 { color: #fff; font-size: 0.92rem; letter-spacing: 0.04em; margin-bottom: 16px; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 0.92rem; transition: color var(--transition); }
.footer-links a:hover { color: #fff; }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 24px; font-size: 0.82rem; color: rgba(255,255,255,0.5);
  flex-wrap: wrap; gap: 10px;
}

/* ---------- Utilities ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.icon-svg { width: 24px; height: 24px; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }