/* ============================================================
   비즈워크스 | Premium Construction Materials
   Main Stylesheet
============================================================ */

/* ── 0. Reset & Variables ──────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  /* Brand Colors */
  --gold:       #C9A84C;
  --gold-light: #E2C97E;
  --gold-dark:  #9E7A2E;
  --black:      #0A0A0A;
  --dark:       #111318;
  --charcoal:   #1A1D24;
  --mid-dark:   #242830;
  --gray-dark:  #3A3F4B;
  --gray:       #6B7280;
  --gray-light: #9CA3AF;
  --off-white:  #F5F3EE;
  --white:      #FFFFFF;

  /* Typography */
  --font-serif: 'Noto Serif KR', 'Playfair Display', Georgia, serif;
  --font-sans:  'Noto Sans KR', 'Apple SD Gothic Neo', sans-serif;

  /* Spacing */
  --section-py: 100px;
  --container:  1240px;

  /* Transitions */
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--white);
  color: var(--dark);
  line-height: 1.7;
  overflow-x: hidden;
}

img { display: block; width: 100%; height: 100%; object-fit: cover; }
a  { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

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

.section-padding { padding: var(--section-py) 0; }
.bg-dark    { background: var(--dark); }
.bg-charcoal{ background: var(--charcoal); }
.pc-only    { display: inline; }

/* ── Scroll Reveal ──────────────────────────────────────── */
.reveal-up, .reveal-left, .reveal-right {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  transition-delay: var(--delay, 0s);
}
.reveal-left  { transform: translateX(-50px); }
.reveal-right { transform: translateX(50px); }
.reveal-up.visible,
.reveal-left.visible,
.reveal-right.visible {
  opacity: 1;
  transform: none;
}

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  border-radius: 2px;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--gold);
  color: var(--black);
}
.btn-primary:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(201,168,76,0.4);
}
.btn-outline {
  border: 1.5px solid rgba(255,255,255,0.6);
  color: var(--white);
}
.btn-outline:hover {
  border-color: var(--gold);
  color: var(--gold);
  transform: translateY(-2px);
}
.btn-full { width: 100%; justify-content: center; }

/* ── Section Headings ───────────────────────────────────── */
.section-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 14px;
  position: relative;
  padding-left: 28px;
}
.section-tag::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  width: 18px; height: 1.5px;
  background: var(--gold);
  transform: translateY(-50%);
}
.section-tag.light { color: var(--gold-light); }
.section-tag.light::before { background: var(--gold-light); }

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.28;
  color: var(--dark);
  margin-bottom: 18px;
}
.section-title em { color: var(--gold); font-style: normal; }
.section-title.light { color: var(--white); }

.section-desc {
  font-size: 1rem;
  color: var(--gray);
  max-width: 560px;
  margin: 0 auto;
}
.section-desc.light { color: var(--gray-light); }

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

/* ============================================================
   1. HEADER
============================================================ */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 22px 0;
  transition: background var(--transition), padding var(--transition), box-shadow var(--transition);
}
.header.scrolled {
  background: rgba(10, 10, 10, 0.97);
  padding: 14px 0;
  box-shadow: 0 2px 30px rgba(0,0,0,0.4);
  backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  font-size: 1.5rem;
  color: var(--gold);
  line-height: 1;
}
.logo-text {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  letter-spacing: 0.06em;
  color: var(--white);
}
.logo-text strong { color: var(--gold); }
.logo-kr {
  font-size: 0.72rem;
  color: var(--gray-light);
  letter-spacing: 0.1em;
  margin-left: 4px;
}

/* Nav */
.nav-list {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-link {
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.8);
  padding: 8px 14px;
  border-radius: 2px;
  transition: var(--transition);
  text-transform: uppercase;
}
.nav-link:hover { color: var(--gold); }
.nav-cta {
  background: var(--gold);
  color: var(--black) !important;
  font-weight: 700;
  padding: 9px 22px;
  margin-left: 8px;
}
.nav-cta:hover {
  background: var(--gold-light);
  transform: translateY(-1px);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: var(--transition);
  transform-origin: center;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   2. HERO
============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: url('https://sspark.genspark.ai/cfimages?u1=ZdjOoaSRbu10vyAZ8lzFgOzwJIoiSaUjcZpXlIrBojBwz88LhV%2BPV4dAFLDr%2FwPR4ljC7qo3cbmlN2vRkc68qHno%2BMFAi8hslGZSjdhuaUtkIeN1Kw0fzvnjRXmgyxwYqiMII4Fe6AaWF7baFASvbdUMD4ucBneC1D2B&u2=S%2FIbVv1uAWuNo%2BoI&width=2560') center/cover no-repeat fixed;
  overflow: hidden;
}

.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(5,5,8,0.88) 0%,
    rgba(10,10,14,0.75) 50%,
    rgba(15,12,5,0.82) 100%
  );
}

/* Particles canvas area */
.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding-top: 100px;
  padding-bottom: 80px;
}

.hero-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  border: 1px solid var(--gold);
  padding: 6px 16px;
  margin-bottom: 28px;
  animation: fadeInDown 0.8s ease forwards;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 6vw, 5rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.18;
  margin-bottom: 24px;
  animation: fadeInUp 0.9s 0.2s ease both;
}
.hero-title em {
  color: var(--gold);
  font-style: normal;
  display: block;
}

.hero-sub {
  font-size: clamp(0.95rem, 1.6vw, 1.15rem);
  color: rgba(255,255,255,0.72);
  max-width: 580px;
  margin-bottom: 40px;
  line-height: 1.8;
  animation: fadeInUp 0.9s 0.35s ease both;
}

.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 72px;
  animation: fadeInUp 0.9s 0.5s ease both;
}

/* Hero Stats */
.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(201,168,76,0.2);
  backdrop-filter: blur(8px);
  padding: 28px 40px;
  max-width: 680px;
  animation: fadeInUp 0.9s 0.65s ease both;
}
.stat-item {
  flex: 1;
  text-align: center;
}
.stat-num {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
}
.stat-unit {
  font-size: 1rem;
  color: var(--gold-light);
  font-weight: 600;
}
.stat-label {
  display: block;
  font-size: 0.72rem;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.06em;
  margin-top: 6px;
}
.stat-divider {
  width: 1px;
  height: 56px;
  background: rgba(201,168,76,0.25);
  flex-shrink: 0;
}

/* Scroll Down */
.hero-scroll-down {
  position: absolute;
  bottom: 36px; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.5);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  animation: bounce 2s infinite;
  z-index: 2;
}
.hero-scroll-down i { font-size: 0.9rem; }

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   3. TICKER
============================================================ */
.ticker-wrap {
  background: var(--gold);
  overflow: hidden;
  padding: 14px 0;
}
.ticker-track {
  display: flex;
  gap: 36px;
  white-space: nowrap;
  animation: ticker 28s linear infinite;
  width: max-content;
}
.ticker-track span {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--black);
}
.ticker-dot { color: var(--black) !important; opacity: 0.5; }

@keyframes ticker {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ============================================================
   4. ABOUT
============================================================ */
.about { background: var(--off-white); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-img-wrap {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
}
.about-img {
  transition: transform 0.6s ease;
}
.about-img-wrap:hover .about-img { transform: scale(1.04); }

.about-cert-row {
  display: flex;
  gap: 16px;
  margin-top: 40px;
}
.cert-item {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--white);
  border: 1px solid rgba(201,168,76,0.2);
  padding: 12px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--gray-dark);
}
.cert-item i { color: var(--gold); font-size: 1rem; }

.about-text { padding-top: 20px; }

.about-desc {
  color: var(--gray);
  line-height: 1.85;
  margin-bottom: 18px;
  font-size: 0.97rem;
}

.about-values { margin-top: 36px; display: flex; flex-direction: column; gap: 24px; }
.value-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}
.value-icon {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  color: var(--black);
  font-size: 1.1rem;
}
.value-info h4 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 4px;
}
.value-info p {
  font-size: 0.87rem;
  color: var(--gray);
  line-height: 1.6;
}

/* ============================================================
   5. MATERIALS
============================================================ */
.materials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.material-card {
  background: var(--mid-dark);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}
.material-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
  z-index: 2;
}

.mat-icon-wrap {
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  position: relative;
}
.mat-icon-wrap img {
  transition: transform 0.6s ease;
  object-fit: cover;
}
.material-card:hover .mat-icon-wrap img { transform: scale(1.07); }

.mat-body {
  padding: 28px 28px 32px;
}
.mat-num {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--gold);
  margin-bottom: 10px;
}
.mat-body h3 {
  font-family: var(--font-serif);
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 12px;
}
.mat-body p {
  font-size: 0.86rem;
  color: rgba(255,255,255,0.55);
  line-height: 1.75;
  margin-bottom: 18px;
}
.mat-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.mat-tags li {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--gold);
  border: 1px solid rgba(201,168,76,0.35);
  padding: 4px 10px;
}

/* ============================================================
   6. STRENGTHS
============================================================ */
.strengths { background: var(--white); }

.strengths-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.strength-card {
  padding: 40px 30px;
  border: 1px solid rgba(0,0,0,0.08);
  background: var(--white);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.strength-card::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.strength-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.1);
  border-color: transparent;
}
.strength-card:hover::before { transform: scaleX(1); }

.str-number {
  font-size: 3.5rem;
  font-family: var(--font-serif);
  font-weight: 700;
  color: rgba(201,168,76,0.12);
  line-height: 1;
  position: absolute;
  top: 20px; right: 20px;
}
.str-icon {
  width: 54px; height: 54px;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  display: flex; align-items: center; justify-content: center;
  color: var(--black);
  font-size: 1.3rem;
  margin-bottom: 22px;
}
.strength-card h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--dark);
}
.strength-card p {
  font-size: 0.86rem;
  color: var(--gray);
  line-height: 1.75;
  margin-bottom: 18px;
}
.str-tags {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.str-tags span {
  font-size: 0.7rem;
  color: var(--gold-dark);
  font-weight: 600;
  letter-spacing: 0.04em;
}
.str-tags span::before { content: '✓ '; }

/* ============================================================
   7. PROCESS
============================================================ */
.process-steps {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  position: relative;
}

.process-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}

.step-circle {
  width: 56px; height: 56px;
  border: 2px solid var(--gold);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--dark);
  z-index: 2;
  position: relative;
  margin-bottom: 24px;
}
.step-circle span {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.05em;
}

.step-line {
  position: absolute;
  top: 28px;
  left: calc(50% + 28px);
  right: calc(-50% + 28px);
  height: 1px;
  background: linear-gradient(90deg, var(--gold), rgba(201,168,76,0.2));
}
.step-line.none { display: none; }

.step-body i {
  font-size: 1.8rem;
  color: var(--gold);
  margin-bottom: 14px;
}
.step-body h4 {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
}
.step-body p {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.6;
}

/* ============================================================
   8. PROJECTS
============================================================ */
.projects { background: var(--off-white); }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 56px;
}

.project-card {
  background: var(--white);
  overflow: hidden;
  box-shadow: 0 2px 16px rgba(0,0,0,0.07);
  transition: transform var(--transition), box-shadow var(--transition);
}
.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.14);
}

.proj-img-wrap {
  position: relative;
  aspect-ratio: 16/10;
  overflow: hidden;
}
.proj-img-wrap img {
  transition: transform 0.6s ease;
}
.project-card:hover .proj-img-wrap img { transform: scale(1.06); }

.proj-overlay {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(0deg, rgba(0,0,0,0.7), transparent);
  padding: 40px 20px 16px;
}
.proj-type {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--gold);
  text-transform: uppercase;
}

.proj-info {
  padding: 22px 24px;
}
.proj-info h4 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
}
.proj-info p {
  font-size: 0.82rem;
  color: var(--gray);
  line-height: 1.6;
}
.proj-year {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--gold);
  border: 1px solid rgba(201,168,76,0.3);
  padding: 3px 10px;
}

/* Trust Row */
.trust-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid rgba(201,168,76,0.2);
  background: var(--white);
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 28px 24px;
  border-right: 1px solid rgba(201,168,76,0.15);
  transition: background var(--transition);
}
.trust-item:last-child { border-right: none; }
.trust-item:hover { background: rgba(201,168,76,0.04); }
.trust-item > i {
  font-size: 1.6rem;
  color: var(--gold);
  flex-shrink: 0;
  width: 36px;
  text-align: center;
}
.trust-item strong {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 2px;
}
.trust-item span {
  font-size: 0.78rem;
  color: var(--gray);
}

/* ============================================================
   9. TESTIMONIALS
============================================================ */
.testimonials { }

.testi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testi-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(201,168,76,0.15);
  padding: 36px;
  transition: border-color var(--transition), transform var(--transition);
}
.testi-card:hover {
  border-color: rgba(201,168,76,0.45);
  transform: translateY(-4px);
}

.testi-quote {
  color: var(--gold);
  font-size: 1.5rem;
  margin-bottom: 18px;
  opacity: 0.6;
}
.testi-card p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.65);
  line-height: 1.85;
  margin-bottom: 28px;
  font-style: italic;
}
.testi-author {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 20px;
}
.testi-avatar {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--gold-dark), var(--gold));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--black);
  flex-shrink: 0;
}
.testi-author strong {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 2px;
}
.testi-author span {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.45);
}

/* ============================================================
   10. CONTACT
============================================================ */
.contact { background: var(--white); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  align-items: start;
}

.contact-desc {
  font-size: 0.95rem;
  color: var(--gray);
  line-height: 1.85;
  margin-bottom: 44px;
}

.contact-details { display: flex; flex-direction: column; gap: 22px; }
.contact-detail-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.cd-icon {
  width: 42px; height: 42px;
  background: rgba(201,168,76,0.1);
  display: flex; align-items: center; justify-content: center;
  color: var(--gold);
  flex-shrink: 0;
}
.contact-detail-item strong {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--dark);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 3px;
}
.contact-detail-item span {
  font-size: 0.9rem;
  color: var(--gray);
}

/* Form */
.contact-form-wrap {
  background: var(--off-white);
  padding: 44px 40px;
  border: 1px solid rgba(201,168,76,0.15);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-bottom: 18px;
}
.form-group label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--gray-dark);
  text-transform: uppercase;
}
.req { color: var(--gold); }

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 13px 16px;
  background: var(--white);
  border: 1.5px solid rgba(0,0,0,0.1);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--dark);
  transition: border-color var(--transition);
  outline: none;
  appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201,168,76,0.12);
}
.form-group textarea { resize: vertical; min-height: 130px; }

.form-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 24px;
}
.form-check input[type="checkbox"] {
  width: 16px; height: 16px;
  margin-top: 2px;
  accent-color: var(--gold);
  flex-shrink: 0;
}
.form-check label {
  font-size: 0.82rem;
  color: var(--gray);
}

.form-success {
  display: none;
  text-align: center;
  padding: 60px 20px;
}
.form-success i {
  font-size: 3rem;
  color: var(--gold);
  margin-bottom: 18px;
}
.form-success h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--dark);
  margin-bottom: 10px;
}
.form-success p {
  font-size: 0.9rem;
  color: var(--gray);
}

/* ============================================================
   11. FOOTER
============================================================ */
.footer { background: var(--black); color: var(--white); }

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 48px;
  padding-top: 64px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.logo-footer .logo-kr { display: none; }
.footer-brand p {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.45);
  line-height: 1.75;
  margin-top: 16px;
  margin-bottom: 24px;
}

.footer-social {
  display: flex;
  gap: 10px;
}
.footer-social a {
  width: 36px; height: 36px;
  border: 1px solid rgba(255,255,255,0.15);
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.5);
  font-size: 0.85rem;
  transition: var(--transition);
}
.footer-social a:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.footer-links h5,
.footer-contact-info h5 {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 20px;
}
.footer-links ul { display: flex; flex-direction: column; gap: 10px; }
.footer-links a {
  font-size: 0.86rem;
  color: rgba(255,255,255,0.45);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--gold); }

.footer-contact-info p {
  font-size: 0.84rem;
  color: rgba(255,255,255,0.45);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 10px;
}
.footer-contact-info i {
  color: var(--gold);
  font-size: 0.8rem;
  margin-top: 3px;
  flex-shrink: 0;
  width: 14px;
}
.footer-biz {
  font-size: 0.75rem !important;
  color: rgba(255,255,255,0.25) !important;
  margin-top: 14px !important;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 24px;
  max-width: var(--container);
  margin: 0 auto;
}
.footer-bottom p {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.25);
}
.footer-bottom-links {
  display: flex;
  gap: 24px;
}
.footer-bottom-links a {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.3);
  transition: color var(--transition);
}
.footer-bottom-links a:hover { color: var(--gold); }

/* ============================================================
   12. BACK TO TOP
============================================================ */
.back-to-top {
  position: fixed;
  bottom: 32px; right: 32px;
  width: 46px; height: 46px;
  background: var(--gold);
  color: var(--black);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem;
  z-index: 900;
  opacity: 0;
  transform: translateY(12px);
  transition: var(--transition);
  pointer-events: none;
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}
.back-to-top:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
}

/* ============================================================
   13. RESPONSIVE
============================================================ */
@media (max-width: 1100px) {
  .strengths-grid  { grid-template-columns: repeat(2, 1fr); }
  .process-steps   { grid-template-columns: repeat(3, 1fr); gap: 32px; }
  .step-line       { display: none; }
  .materials-grid  { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  :root { --section-py: 72px; }

  .about-grid      { grid-template-columns: 1fr; gap: 50px; }
  .about-img-badge { bottom: -14px; right: -8px; }

  .contact-grid    { grid-template-columns: 1fr; gap: 50px; }
  .projects-grid   { grid-template-columns: 1fr; max-width: 520px; margin: 0 auto 56px; }
  .testi-grid      { grid-template-columns: 1fr; }
  .trust-row       { grid-template-columns: repeat(2, 1fr); }
  .trust-item      { border-bottom: 1px solid rgba(201,168,76,0.1); }
  .trust-item:nth-child(even) { border-right: none; }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .hero-stats  { padding: 22px 24px; flex-wrap: wrap; }
  .stat-item   { min-width: 100px; }
}

@media (max-width: 680px) {
  .pc-only { display: none; }

  /* Header mobile */
  .hamburger { display: flex; }
  .nav {
    position: fixed;
    top: 0; right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--black);
    padding: 80px 32px 40px;
    transition: right var(--transition);
    z-index: 999;
    border-left: 1px solid rgba(201,168,76,0.15);
  }
  .nav.open { right: 0; }
  .nav-list  { flex-direction: column; align-items: flex-start; gap: 4px; }
  .nav-link  { font-size: 0.9rem; padding: 12px 0; width: 100%; }
  .nav-cta   { margin: 16px 0 0; padding: 12px 20px; width: 100%; text-align: center; display: block; }

  .hero-btns  { flex-direction: column; gap: 12px; }
  .btn        { width: 100%; justify-content: center; }

  .hero-stats { flex-direction: column; gap: 20px; max-width: 100%; }
  .stat-divider { width: 100%; height: 1px; }

  .materials-grid  { grid-template-columns: 1fr; }
  .strengths-grid  { grid-template-columns: 1fr; }
  .process-steps   { grid-template-columns: repeat(2, 1fr); gap: 28px; }

  .form-row        { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: 28px 20px; }

  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .trust-row { grid-template-columns: 1fr; }
  .trust-item { border-right: none; }

  .about-cert-row { flex-direction: column; }
}

@media (max-width: 420px) {
  .hero-badge { font-size: 0.6rem; letter-spacing: 0.12em; }
  .process-steps { grid-template-columns: 1fr; }
}