/* ============================================================
   Jin Industry — styles.css  (2026 Redesign)
   색상·폰트·간격을 여기서 통합 관리합니다.
   ============================================================ */

/* ── 디자인 토큰 ─────────────────────────────────────────────── */
:root {
  --black:        #0a0a0a;
  --white:        #ffffff;
  --gray-50:      #fafafa;
  --gray-100:     #f4f4f3;
  --gray-200:     #e8e8e6;
  --gray-300:     #d1d1ce;
  --gray-500:     #8a8a87;
  --gray-700:     #454542;
  --wood:         #b8a48a;        /* 우드 액센트 */
  --wood-light:   #f2ece3;        /* 우드 라이트 배경 */
  --wood-mid:     #e4d9cc;

  --font:         -apple-system, BlinkMacSystemFont, 'Segoe UI',
                  'Noto Sans KR', 'Apple SD Gothic Neo', sans-serif;

  --nav-h:        64px;           /* ← 고정: 로고 기준 */
  --max-w:        1080px;
  --r-sm:         6px;
  --r-md:         12px;
  --r-lg:         18px;
  --ease:         cubic-bezier(0.16, 1, 0.3, 1);
  --dur:          0.22s;
}

/* ── 리셋 ────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--white);
  color: var(--black);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a   { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; border: none; }

/* ── 레이아웃 ─────────────────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
@media (min-width: 641px)  { .container { padding: 0 32px; } }
@media (min-width: 1025px) { .container { padding: 0 40px; } }

/* 섹션 패딩 */
section { padding: 72px 24px; }
@media (min-width: 641px)  { section { padding: 96px 32px; } }
@media (min-width: 1025px) { section { padding: 120px 40px; } }

/* ── 타이포그래피 ──────────────────────────────────────────────── */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-500);
}

h1, h2, h3 {
  line-height: 1.1;
  letter-spacing: -0.025em;
  font-weight: 800;
}

/* ── 버튼 ─────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  font-size: 14px;
  border-radius: var(--r-sm);
  transition: all var(--dur) var(--ease);
  white-space: nowrap;
  cursor: pointer;
  min-height: 44px;
  padding: 0 22px;
}
.btn-dark {
  background: var(--black);
  color: var(--white);
  border: 1.5px solid var(--black);
}
.btn-dark:hover  { background: #1f1f1f; transform: translateY(-1px); box-shadow: 0 4px 16px rgba(0,0,0,0.18); }
.btn-dark:active { transform: translateY(0); box-shadow: none; }

.btn-ghost {
  background: transparent;
  color: var(--black);
  border: 1.5px solid var(--gray-300);
}
.btn-ghost:hover { border-color: var(--black); }

/* hero에서 큰 버튼 */
.btn-lg { font-size: 15px; padding: 0 28px; min-height: 50px; }

/* ════════════════════════════════════════════════════════
   ① NAV
════════════════════════════════════════════════════════ */
#nav {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  overflow: hidden;                /* 로고 절대 삐져나오지 않음 */
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--gray-200);
  z-index: 1000;
  display: flex;
  align-items: center;
  padding: 0 24px;
}
@media (min-width: 641px) { #nav { padding: 0 32px; } }

.nav-inner {
  max-width: var(--max-w);
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

/* 로고: 높이를 nav 안에 정확히 가둠 */
.nav-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.nav-logo img {
  height: 36px;          /* 모바일: nav 64px 안에 여유 있게 */
  width: auto;
  object-fit: contain;
  display: block;
}
@media (min-width: 1025px) {
  .nav-logo img { height: 44px; } /* 데스크톱: 44px ← nav 64px 안에 안전 */
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* 언어 토글 */
.lang-toggle {
  display: flex;
  background: var(--gray-100);
  border-radius: var(--r-sm);
  padding: 3px;
  gap: 2px;
}
.lang-btn {
  padding: 5px 11px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  background: transparent;
  color: var(--gray-500);
  transition: background var(--dur), color var(--dur);
}
.lang-btn.active {
  background: var(--black);
  color: var(--white);
}

/* 모바일 CTA 텍스트 */
.nav-cta-full  { display: none; }
.nav-cta-short { display: inline; }
@media (min-width: 641px) {
  .nav-cta-full  { display: inline; }
  .nav-cta-short { display: none; }
}

/* ════════════════════════════════════════════════════════
   ② HERO
════════════════════════════════════════════════════════ */
#hero {
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--nav-h) + 80px);
  padding-bottom: 96px;
  background: var(--white);
  /* 미묘한 dot 그리드 배경 */
  background-image: radial-gradient(circle, var(--gray-200) 1px, transparent 1px);
  background-size: 28px 28px;
  background-position: 0 0;
}
/* 그라디언트 마스크로 dot 자연스럽게 페이드 */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 20% 40%, rgba(255,255,255,0.95) 30%, transparent 80%),
              linear-gradient(to bottom, rgba(255,255,255,0) 60%, var(--white) 100%);
  pointer-events: none;
}
.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}
@media (min-width: 641px)  { .hero-inner { padding: 0 32px; } }
@media (min-width: 1025px) { .hero-inner { padding: 0 40px; } }

/* Hero 뱃지 */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px 7px 10px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 28px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}
.hero-badge .badge-icon {
  width: 20px; height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--black);
  border-radius: 50%;
  color: var(--white);
  flex-shrink: 0;
}
.hero-badge .badge-icon svg { width: 11px; height: 11px; }

#hero h1 {
  font-size: clamp(40px, 7.5vw, 80px);
  font-weight: 900;
  line-height: 1.0;
  letter-spacing: -0.035em;
  margin: 0 0 28px;
  color: var(--black);
}
#hero h1 .muted { color: var(--gray-300); }

.hero-sub {
  font-size: clamp(16px, 1.8vw, 18px);
  color: var(--gray-500);
  max-width: 520px;
  line-height: 1.75;
  margin-bottom: 44px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

/* ════════════════════════════════════════════════════════
   ③ ABOUT
════════════════════════════════════════════════════════ */
#about {
  background: var(--gray-50);
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
}
.about-inner { max-width: var(--max-w); margin: 0 auto; }

#about h2 {
  font-size: clamp(28px, 4vw, 44px);
  margin: 10px 0 20px;
}
.about-desc {
  font-size: 17px;
  color: var(--gray-500);
  line-height: 1.85;
  max-width: 540px;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  margin-top: 56px;
}
@media (min-width: 1025px) {
  .about-grid { grid-template-columns: 1fr 1fr; gap: 72px; align-items: start; }
}

/* 대표 카드 */
.founder-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--r-lg);
  padding: 36px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.03);
}
.founder-name  { font-size: 17px; font-weight: 800; margin-bottom: 4px; }
.founder-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--wood);
  margin-bottom: 20px;
}
.founder-bio   { font-size: 14px; color: var(--gray-500); line-height: 1.85; }
.founder-bio + .founder-bio { margin-top: 14px; }

.linkedin-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 24px;
  font-size: 13px;
  font-weight: 600;
  color: var(--black);
  padding-bottom: 2px;
  border-bottom: 1px solid var(--gray-200);
  transition: border-color var(--dur), gap var(--dur);
}
.linkedin-link:hover { border-color: var(--black); gap: 10px; }

/* ════════════════════════════════════════════════════════
   ④ SERVICES
════════════════════════════════════════════════════════ */
#services { background: var(--white); }
.services-inner { max-width: var(--max-w); margin: 0 auto; }
#services h2 { font-size: clamp(28px, 4vw, 44px); margin: 10px 0; }

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 48px;
}
@media (min-width: 641px) { .services-grid { grid-template-columns: 1fr 1fr; } }

.service-card {
  border: 1px solid var(--gray-200);
  border-radius: var(--r-lg);
  padding: 36px 32px 40px;
  transition: border-color var(--dur), box-shadow var(--dur), transform var(--dur) var(--ease);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--gray-50) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--dur);
}
.service-card:hover {
  border-color: var(--black);
  box-shadow: 0 8px 32px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}
.service-card:hover::before { opacity: 1; }

/* 서비스 아이콘 래퍼 (SVG용) */
.service-icon-wrap {
  width: 48px; height: 48px;
  border-radius: var(--r-md);
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
  transition: background var(--dur), border-color var(--dur);
}
.service-card:hover .service-icon-wrap {
  background: var(--black);
  border-color: var(--black);
  color: var(--white);
}
.service-icon-wrap svg {
  width: 22px; height: 22px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: color var(--dur);
}

.service-card h3 {
  font-size: 19px;
  font-weight: 800;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}
.service-card > p {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.8;
  position: relative;
  z-index: 1;
}
.service-card ul {
  list-style: none;
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  z-index: 1;
}
.service-card ul li {
  font-size: 13px;
  color: var(--gray-500);
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.service-card ul li::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--wood);
  flex-shrink: 0;
  margin-top: 6px;
}

/* ════════════════════════════════════════════════════════
   ⑤ WHY US
════════════════════════════════════════════════════════ */
#why-us {
  background: var(--black);
  color: var(--white);
  position: relative;
  overflow: hidden;
}
/* 배경 노이즈 텍스처 */
#why-us::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  opacity: 0.4;
}
.why-inner { max-width: var(--max-w); margin: 0 auto; position: relative; }
#why-us .eyebrow { color: var(--wood); }
#why-us h2 {
  font-size: clamp(28px, 4vw, 44px);
  color: var(--white);
  margin: 10px 0;
}

.why-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: 56px;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--r-lg);
  overflow: hidden;
}
@media (min-width: 641px) {
  .why-grid { grid-template-columns: repeat(3, 1fr); }
}

.why-item {
  padding: 36px 32px;
  background: rgba(255,255,255,0.03);
  border-right: 1px solid rgba(255,255,255,0.08);
  transition: background var(--dur);
}
.why-item:last-child { border-right: none; }
@media (max-width: 640px) {
  .why-item { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.08); }
  .why-item:last-child { border-bottom: none; }
}
.why-item:hover { background: rgba(255,255,255,0.06); }

.why-num {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--wood);
  margin-bottom: 20px;
  font-variant-numeric: tabular-nums;
}
.why-item h3 {
  font-size: 17px;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 10px;
}
.why-item p {
  font-size: 14px;
  color: rgba(255,255,255,0.45);
  line-height: 1.8;
}

/* ════════════════════════════════════════════════════════
   ⑥ CTA BANNER
════════════════════════════════════════════════════════ */
#cta-banner {
  background: var(--wood-light);
  border-top: 1px solid var(--wood-mid);
  border-bottom: 1px solid var(--wood-mid);
  text-align: center;
  padding: 96px 24px;
}
#cta-banner h2 {
  font-size: clamp(26px, 4vw, 42px);
  margin-bottom: 16px;
}
#cta-banner p {
  font-size: 16px;
  color: var(--gray-700);
  max-width: 460px;
  margin: 0 auto 36px;
  line-height: 1.75;
}

/* ════════════════════════════════════════════════════════
   ⑦ CONTACT
════════════════════════════════════════════════════════ */
#contact { background: var(--white); }
.contact-inner { max-width: var(--max-w); margin: 0 auto; }
#contact h2 { font-size: clamp(28px, 4vw, 44px); margin: 10px 0; }

.contact-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 48px;
}
@media (min-width: 641px) {
  .contact-row { grid-template-columns: 1fr 1fr; align-items: start; }
}

.contact-info > p { font-size: 15px; color: var(--gray-500); line-height: 1.85; }
.email-link {
  display: inline-block;
  margin-top: 20px;
  font-size: 15px;
  font-weight: 700;
  border-bottom: 2px solid var(--black);
  padding-bottom: 2px;
  transition: opacity var(--dur);
}
.email-link:hover { opacity: 0.5; }

.contact-cta {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--r-lg);
  padding: 36px;
}
.contact-cta .eyebrow { margin-bottom: 16px; }
.contact-cta p {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.8;
  margin-bottom: 28px;
}

/* divider */
.divider {
  width: 36px; height: 2px;
  background: var(--wood);
  border-radius: 2px;
  margin: 20px 0;
}

/* ════════════════════════════════════════════════════════
   ⑧ FOOTER
════════════════════════════════════════════════════════ */
#footer {
  background: var(--black);
  padding: 40px 24px;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: center;
  text-align: center;
}
@media (min-width: 641px) {
  .footer-inner { flex-direction: row; justify-content: space-between; text-align: left; }
}

.footer-logo img {
  height: 30px;
  width: auto;
  opacity: 0.6;
  filter: invert(1);
}
.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}
.footer-links a {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  transition: color var(--dur);
}
.footer-links a:hover { color: var(--white); }
.footer-copy { font-size: 12px; color: rgba(255,255,255,0.25); }

/* ════════════════════════════════════════════════════════
   STICKY 모바일 CTA
════════════════════════════════════════════════════════ */
#sticky-cta {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: rgba(10,10,10,0.96);
  backdrop-filter: blur(12px);
  padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
  z-index: 998;
  border-top: 1px solid rgba(255,255,255,0.08);
}
#sticky-cta a {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  color: var(--black);
  border-radius: var(--r-sm);
  font-weight: 700;
  font-size: 14px;
  min-height: 48px;
  width: 100%;
}
@media (min-width: 641px) { #sticky-cta { display: none !important; } }

/* ════════════════════════════════════════════════════════
   ANIMATIONS
════════════════════════════════════════════════════════ */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ── 접근성 ── */
:focus-visible {
  outline: 2px solid var(--wood);
  outline-offset: 3px;
  border-radius: 3px;
}