/* ============================================================
   한국비엔에스 (Korea BNS) — 메인 스타일시트
   BIO Natural Science | 브랜드 컬러 적용 전체 CSS
   ============================================================ */

/* ── 0. CSS Variables ──────────────────────────────────────── */
:root {
  --bns-green:       #207459;
  --bns-green-dark:  #165a43;
  --bns-green-light: #2d9470;
  --bns-warm-green:  #4AA280;
  --bns-gray:        #454545;
  --bns-warm-gray:   #9FA09F;
  --bns-cool-gray:   #F8F7F5;
  --bns-light-green: #EBF7F2;

  --white:           #FFFFFF;
  --black:           #111111;
  --text-dark:       #2d2d2d;
  --text-mid:        #666666;
  --text-light:      #9FA09F;
  --border-light:    #e4e8e4;
  --border-mid:      #d0d5d0;

  --shadow-xs: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-sm: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.10);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.13);
  --shadow-xl: 0 24px 64px rgba(0,0,0,0.16);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;

  --transition: 0.28s ease;
  --font-main: 'Noto Sans KR', 'Apple SD Gothic Neo', sans-serif;

  --container: 1160px;
  --header-h: 72px;
}

/* ── 1. Reset & Base ───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

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

img { max-width: 100%; height: auto; display: block; }
a  { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: var(--font-main); cursor: pointer; }
input, textarea, select { font-family: var(--font-main); }

/* ── 2. Typography ─────────────────────────────────────────── */
.section-tag {
  display: inline-block;
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bns-green);
  background: rgba(32,116,89,0.08);
  border: 1px solid rgba(32,116,89,0.16);
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  color: var(--bns-gray);
  line-height: 1.3;
  margin-bottom: 14px;
}

.section-title span { color: var(--bns-green); }

.section-desc {
  font-size: 0.95rem;
  color: var(--text-mid);
  line-height: 1.85;
  max-width: 560px;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header .section-desc {
  margin: 0 auto;
}

/* ── 3. Layout ─────────────────────────────────────────────── */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── 4. Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all var(--transition);
  border: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--bns-green);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--bns-green-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(32,116,89,0.35);
}

.btn-white {
  background: var(--white);
  color: var(--bns-green);
  font-weight: 700;
}

.btn-white:hover {
  background: var(--bns-light-green);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border-color: var(--bns-green);
  color: var(--bns-green);
}

.btn-outline:hover {
  background: var(--bns-green);
  color: var(--white);
  transform: translateY(-2px);
}

/* ── 5. Header & Navigation ───────────────────────────────── */
#header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all var(--transition);
  border-bottom: 1px solid transparent;
}

#header.scrolled {
  border-bottom-color: var(--border-light);
  box-shadow: 0 4px 20px rgba(0,0,0,0.07);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 24px;
}

/* 로고 */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}

.nav-logo img {
  height: 42px;
  width: auto;
  object-fit: contain;
  display: block;
}

/* 혹시 img 로드 실패 시 텍스트 폴백 */
.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.nav-logo-text .brand-name {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--bns-green);
  letter-spacing: -0.01em;
}

.nav-logo-text .brand-sub {
  font-size: 0.6rem;
  font-weight: 500;
  color: var(--bns-warm-gray);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* 메뉴 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-menu li a {
  display: block;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-dark);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative;
}

.nav-menu li a:hover,
.nav-menu li a.active {
  color: var(--bns-green);
  background: rgba(32,116,89,0.06);
}

.nav-menu li a.nav-cta {
  background: var(--bns-green);
  color: var(--white) !important;
  padding: 9px 20px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  margin-left: 8px;
}

.nav-menu li a.nav-cta:hover {
  background: var(--bns-green-dark);
  box-shadow: 0 4px 14px rgba(32,116,89,0.35);
  transform: translateY(-1px);
}

/* 햄버거 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 6px;
  cursor: pointer;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--bns-gray);
  border-radius: 2px;
  transition: all var(--transition);
}

.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); }

/* 모바일 메뉴 */
.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--white);
  border-top: 1px solid var(--border-light);
  padding: 12px 0;
  box-shadow: var(--shadow-md);
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu a {
  padding: 14px 28px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-dark);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition);
}

.mobile-menu a:last-child { border-bottom: none; }

.mobile-menu a:hover,
.mobile-menu a.active {
  color: var(--bns-green);
  background: var(--bns-light-green);
  padding-left: 36px;
}

/* ── 6. Hero Section ────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  background: linear-gradient(135deg, #0d3326 0%, #207459 40%, #2d9470 70%, #1a5c44 100%);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--header-h);
}

/* 배경 패턴 */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(74,162,128,0.18) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255,255,255,0.05) 0%, transparent 40%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100px;
  background: linear-gradient(to bottom, transparent, rgba(13,51,38,0.3));
  pointer-events: none;
}

.hero .container { position: relative; z-index: 1; }

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 60px;
  align-items: center;
  padding: 80px 0;
}

/* Hero 왼쪽 콘텐츠 */
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.78rem;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 7px 16px;
  border-radius: 20px;
  margin-bottom: 22px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero-title {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1.22;
  margin-bottom: 22px;
  letter-spacing: -0.02em;
}

.hero-title .highlight {
  background: linear-gradient(135deg, #a8f0cc, #6dddb0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1rem;
  color: rgba(255,255,255,0.78);
  line-height: 1.9;
  margin-bottom: 36px;
}

.hero-btns {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* Hero 오른쪽 카드 스택 */
.hero-visual { position: relative; }

.hero-card-stack {
  position: relative;
  height: 360px;
}

.hero-card {
  position: absolute;
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  color: var(--white);
}

.hero-card-back {
  width: 260px;
  bottom: 0;
  left: 0;
  transform: rotate(-4deg);
  z-index: 1;
  opacity: 0.7;
}

.hero-card-main {
  width: 300px;
  top: 0;
  right: 0;
  z-index: 2;
  background: rgba(255,255,255,0.15) !important;
}

.hero-card-logo {
  height: 32px;
  width: auto;
  filter: brightness(0) invert(1);
  margin-bottom: 14px;
  opacity: 0.9;
  object-fit: contain;
}

.hero-card .hero-card-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.hero-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.hero-card p {
  font-size: 0.82rem;
  opacity: 0.8;
  line-height: 1.6;
}

.hero-stats {
  display: flex;
  gap: 16px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid rgba(255,255,255,0.18);
}

.hero-stat { text-align: center; }

.hero-stat .num {
  display: block;
  font-size: 1.6rem;
  font-weight: 900;
  color: #a8f0cc;
  line-height: 1.1;
}

.hero-stat .label {
  font-size: 0.68rem;
  opacity: 0.72;
  letter-spacing: 0.04em;
}

/* Scroll indicator */
.hero-scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,0.5);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  z-index: 1;
  animation: scrollBounce 2s ease-in-out infinite;
}

.hero-scroll i { font-size: 0.9rem; }

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}

/* ── 7. Page Hero (내부 페이지) ─────────────────────────────── */
.page-hero {
  background: linear-gradient(135deg, #0d3326, #207459, #2a8a65);
  padding: calc(var(--header-h) + 60px) 0 70px;
  color: var(--white);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 100%, rgba(74,162,128,0.2), transparent 60%);
  pointer-events: none;
}

.page-hero .container { position: relative; z-index: 1; }

.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 18px;
}

.breadcrumb a { color: rgba(255,255,255,0.6); }
.breadcrumb a:hover { color: var(--white); }
.breadcrumb span { color: rgba(255,255,255,0.9); font-weight: 600; }

.page-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.page-hero h1 span { color: rgba(255,255,255,0.55); font-weight: 400; }

.page-hero p {
  font-size: 0.97rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.85;
}

/* ── 8. Values Section ──────────────────────────────────────── */
.values-section {
  background: var(--bns-cool-gray);
  padding: 100px 0;
}

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

.value-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  border: 1px solid var(--border-light);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.value-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(to right, var(--bns-green), var(--bns-warm-green));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.value-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.value-card:hover::before { transform: scaleX(1); }

.value-card-bg-num {
  position: absolute;
  right: 20px;
  bottom: 14px;
  font-size: 7rem;
  font-weight: 900;
  color: rgba(32,116,89,0.04);
  line-height: 1;
  pointer-events: none;
  user-select: none;
}

.value-icon {
  font-size: 2.4rem;
  margin-bottom: 16px;
}

.value-card .badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bns-green);
  background: rgba(32,116,89,0.07);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.value-card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--bns-gray);
  margin-bottom: 10px;
}

.value-card p {
  font-size: 0.875rem;
  color: var(--text-mid);
  line-height: 1.75;
}

/* ── 9. About Preview ───────────────────────────────────────── */
.about-preview {
  background: var(--white);
  padding: 100px 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

.about-visual {
  position: relative;
}

.about-img-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  background: #ffffff;
  min-height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-img-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.about-badge-float {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
  z-index: 2;
}

.about-badge-float img {
  height: 38px;
  width: auto;
  object-fit: contain;
}

.about-badge-float .txt {
  font-size: 0.65rem;
  color: var(--bns-warm-gray);
  margin-top: 6px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
}

.about-content {}

.about-features {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 32px;
}

.about-feature {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.about-feature-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: var(--bns-light-green);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bns-green);
  font-size: 1.1rem;
}

.about-feature h4 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--bns-gray);
  margin-bottom: 4px;
}

.about-feature p {
  font-size: 0.82rem;
  color: var(--text-mid);
  line-height: 1.65;
}

/* ── 10. Trust / Numbers ────────────────────────────────────── */
.trust-section {
  background: linear-gradient(135deg, #0d3326, #207459);
  padding: 80px 0;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
}

.trust-item {
  text-align: center;
  padding: 40px 20px;
  color: var(--white);
  position: relative;
  overflow: hidden;
  transition: background var(--transition);
}

.trust-item + .trust-item {
  border-left: 1px solid rgba(255,255,255,0.1);
}

.trust-item:hover {
  background: rgba(255,255,255,0.06);
}

.trust-item i {
  font-size: 1.8rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 14px;
  display: block;
}

.trust-item .num {
  display: block;
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 900;
  color: #a8f0cc;
  line-height: 1.1;
  margin-bottom: 8px;
}

.trust-item .label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.65);
  line-height: 1.6;
}

/* ── 11. Products Preview ───────────────────────────────────── */
.products-preview {
  background: var(--bns-cool-gray);
  padding: 100px 0;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-bottom: 44px;
}

.product-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: all var(--transition);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.product-img {
  height: 200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-img.ginseng {
  background: linear-gradient(135deg, #e8f4ef, #c8e9d8, #a8dbc0);
}

.product-img.hydrogen {
  background: linear-gradient(135deg, #e8eef4, #c8d8e9, #a8c4db);
}

.product-img-icon {
  font-size: 4rem;
  margin-bottom: 8px;
}

.product-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--bns-green);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(255,255,255,0.8);
  padding: 4px 12px;
  border-radius: 12px;
}

.product-body {
  padding: 28px 24px;
}

.product-category {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bns-green);
  margin-bottom: 8px;
}

.product-body h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--bns-gray);
  margin-bottom: 10px;
}

.product-body p {
  font-size: 0.875rem;
  color: var(--text-mid);
  line-height: 1.75;
  margin-bottom: 16px;
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}

.product-tag {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--bns-green);
  background: rgba(32,116,89,0.07);
  border: 1px solid rgba(32,116,89,0.15);
  padding: 4px 10px;
  border-radius: 12px;
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--bns-green);
  transition: gap var(--transition);
}

.product-link:hover { gap: 10px; }

.products-cta { text-align: center; }

/* ── 12. News Preview ───────────────────────────────────────── */
.news-preview {
  background: var(--white);
  padding: 100px 0;
}

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

.news-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: all var(--transition);
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.news-img {
  height: 160px;
  background: linear-gradient(135deg, #e8f4ef, #c8e9d8);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  gap: 8px;
  position: relative;
}

.news-cat {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bns-green);
  background: rgba(255,255,255,0.85);
  padding: 3px 10px;
  border-radius: 10px;
}

.news-body {
  padding: 22px 20px;
}

.news-date {
  font-size: 0.76rem;
  color: var(--bns-warm-gray);
  margin-bottom: 8px;
  font-weight: 500;
}

.news-body h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--bns-gray);
  line-height: 1.5;
  margin-bottom: 10px;
}

.news-body p {
  font-size: 0.82rem;
  color: var(--text-mid);
  line-height: 1.65;
  margin-bottom: 14px;
}

.news-read {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--bns-green);
  transition: gap var(--transition);
}

.news-read:hover { gap: 9px; }

/* ── 13. CTA Banner ─────────────────────────────────────────── */
.cta-banner {
  background: linear-gradient(135deg, #0d3326, #207459, #1a5c44);
  padding: 100px 0;
}

.cta-inner {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1.3;
  margin-bottom: 18px;
}

.cta-inner p {
  font-size: 0.97rem;
  color: rgba(255,255,255,0.72);
  line-height: 1.85;
  margin-bottom: 36px;
}

.cta-btns {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── 14. Footer ─────────────────────────────────────────────── */
#footer {
  background: #0a1f17;
  color: rgba(255,255,255,0.65);
  padding-top: 72px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 56px;
}

.footer-brand p {
  font-size: 0.84rem;
  line-height: 1.75;
  max-width: 260px;
}

.footer-logo-img {
  height: 38px;
  width: auto;
  object-fit: contain;
  margin-bottom: 10px;
  filter: brightness(0) invert(1);
  opacity: 0.85;
}

.footer-brand-sub {
  font-size: 0.68rem;
  color: var(--bns-warm-gray);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
  font-weight: 500;
}

.footer-social {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.55);
  font-size: 0.9rem;
  transition: all var(--transition);
}

.footer-social a:hover {
  background: var(--bns-green);
  border-color: var(--bns-green);
  color: var(--white);
  transform: translateY(-2px);
}

.footer-col h4 {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.85);
  margin-bottom: 18px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul li a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  transition: all var(--transition);
}

.footer-col ul li a:hover {
  color: var(--bns-warm-green);
  padding-left: 4px;
}

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.84rem;
}

.footer-contact-item i {
  color: var(--bns-warm-green);
  width: 14px;
  margin-top: 2px;
  flex-shrink: 0;
}

.footer-contact-item span {
  color: rgba(255,255,255,0.65);
  line-height: 1.5;
}

.footer-divider {
  border: none;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.footer-bottom {
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom a {
  color: rgba(255,255,255,0.35);
  transition: color var(--transition);
}

.footer-bottom a:hover { color: rgba(255,255,255,0.7); }

/* ── 15. About Page Specifics ───────────────────────────────── */
.mission-section {
  background: var(--bns-cool-gray);
  padding: 100px 0;
}

.mission-quote {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 60px;
  padding: 36px 40px;
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.mission-quote p {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--bns-green);
  line-height: 1.6;
  margin-bottom: 10px;
}

.mission-quote small {
  font-size: 0.8rem;
  color: var(--bns-warm-gray);
}

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

.pillar-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  border: 1px solid var(--border-light);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.pillar-card::after {
  content: attr(data-num);
  position: absolute;
  bottom: -10px;
  right: 12px;
  font-size: 8rem;
  font-weight: 900;
  color: rgba(32,116,89,0.04);
  line-height: 1;
  pointer-events: none;
}

.pillar-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--bns-warm-green);
}

.pillar-num {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--bns-green);
  background: rgba(32,116,89,0.08);
  padding: 4px 12px;
  border-radius: 20px;
  display: inline-block;
  margin-bottom: 14px;
}

.pillar-card h3 {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--bns-green);
  margin-bottom: 4px;
}

.pillar-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--bns-gray);
  margin-bottom: 12px;
}

.pillar-card p {
  font-size: 0.875rem;
  color: var(--text-mid);
  line-height: 1.8;
}

/* Brand Story */
.story-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.timeline-item {
  padding: 20px 0 20px 28px;
  border-left: 2px solid var(--border-mid);
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -6px;
  top: 26px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bns-green);
  border: 2px solid var(--white);
  box-shadow: 0 0 0 2px var(--bns-green);
}

.timeline-item h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--bns-gray);
  margin-bottom: 8px;
}

.timeline-item p {
  font-size: 0.86rem;
  color: var(--text-mid);
  line-height: 1.75;
}

/* Biz Grid */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.biz-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  gap: 18px;
  align-items: flex-start;
  border: 1px solid var(--border-light);
  transition: all var(--transition);
}

.biz-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--bns-warm-green);
}

.biz-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  background: var(--bns-light-green);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bns-green);
  font-size: 1.2rem;
}

.biz-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--bns-gray);
  margin-bottom: 6px;
}

.biz-card p {
  font-size: 0.83rem;
  color: var(--text-mid);
  line-height: 1.65;
}

/* ── 16. Contact Page ───────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  align-items: flex-start;
}

.contact-info h3 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--bns-gray);
  line-height: 1.35;
  margin-bottom: 14px;
  margin-top: 14px;
}

.contact-info > p {
  font-size: 0.88rem;
  color: var(--text-mid);
  line-height: 1.75;
  margin-bottom: 28px;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 20px;
  background: var(--bns-cool-gray);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  transition: all var(--transition);
}

.contact-item:hover {
  border-color: var(--bns-warm-green);
  background: var(--bns-light-green);
}

.contact-item-icon {
  width: 42px;
  height: 42px;
  min-width: 42px;
  background: var(--bns-green);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1rem;
}

.contact-item h4 {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bns-warm-gray);
  margin-bottom: 3px;
}

.contact-item p {
  font-size: 0.88rem;
  color: var(--text-dark);
  font-weight: 500;
  line-height: 1.5;
}

.contact-item a.link {
  color: var(--bns-green);
  font-weight: 600;
}

/* Contact Form */
.contact-form-wrap {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.contact-form-wrap h3 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--bns-gray);
  margin-bottom: 28px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-light);
}

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

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 7px;
  letter-spacing: 0.02em;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text-dark);
  background: var(--white);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--bns-green);
  box-shadow: 0 0 0 3px rgba(32,116,89,0.1);
}

.form-group textarea {
  min-height: 130px;
  resize: vertical;
  line-height: 1.65;
}

.form-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 22px;
}

.form-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  min-width: 18px;
  margin-top: 2px;
  accent-color: var(--bns-green);
  cursor: pointer;
}

.form-check label {
  font-size: 0.82rem;
  color: var(--text-mid);
  line-height: 1.6;
  cursor: pointer;
}

.form-submit {
  width: 100%;
  padding: 16px;
  background: var(--bns-green);
  color: var(--white);
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--transition);
  letter-spacing: 0.02em;
}

.form-submit:hover {
  background: var(--bns-green-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(32,116,89,0.35);
}

/* Kakao 버튼 */
.kakao-contact-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #FEE500;
  color: #191600;
  border: none;
  border-radius: var(--radius-sm);
  padding: 14px 20px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
  justify-content: center;
}

.kakao-contact-btn:hover {
  background: #f0d800;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(254,229,0,0.4);
}

/* ── 17. Fade-up Animations ─────────────────────────────────── */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* delay utilities */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* ── 18. Responsive ─────────────────────────────────────────── */
@media (max-width: 1024px) {
  .hero-grid         { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual       { display: none; }
  .about-grid        { gap: 48px; }
  .trust-grid        { grid-template-columns: repeat(2, 1fr); }
  .trust-item + .trust-item { border-left: none; }
  .footer-grid       { grid-template-columns: 1fr 1fr; gap: 36px; }
  .contact-grid      { grid-template-columns: 1fr; gap: 44px; }
}

@media (max-width: 768px) {
  :root { --header-h: 64px; }

  /* Nav */
  .nav-menu { display: none; }
  .hamburger { display: flex; }

  /* Hero */
  .hero { min-height: auto; padding-bottom: 40px; }
  .hero-grid { padding: 48px 0 20px; }
  .hero-title { font-size: 1.9rem; }
  .hero-btns  { flex-direction: column; }
  .hero-btns .btn { justify-content: center; }

  /* Sections */
  .values-grid    { grid-template-columns: 1fr; }
  .about-grid     { grid-template-columns: 1fr; }
  .about-visual   { display: none; }
  .products-grid  { grid-template-columns: 1fr; }
  .news-grid      { grid-template-columns: 1fr; }
  .pillars-grid   { grid-template-columns: 1fr; }
  .biz-grid       { grid-template-columns: 1fr; }

  /* Footer */
  .footer-grid    { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom  { flex-direction: column; text-align: center; }

  /* Contact */
  .form-row { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: 28px 22px; }

  /* Story */
  .story-brand-grid { grid-template-columns: 1fr !important; }

  /* Section paddings */
  .values-section,
  .about-preview,
  .products-preview,
  .news-preview,
  .cta-banner { padding: 70px 0; }

  .mission-section { padding: 70px 0; }
}

@media (max-width: 480px) {
  .btn { padding: 12px 22px; font-size: 0.875rem; }
  .section-title { font-size: 1.5rem; }
  .trust-grid { grid-template-columns: 1fr 1fr; }
  .contact-form-wrap { padding: 22px 18px; }
}

/* ── 19. Utility ─────────────────────────────────────────────── */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}

.text-center { text-align: center; }
.mt-4 { margin-top: 16px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }
.mb-8 { margin-bottom: 32px; }