/* SEJINRACK CO.,LTD. -- site stylesheet
   Plain CSS, no build step, no external fonts. */

:root {
  --color-bg: #f7f3ea;
  --color-bg-alt: #efe8d8;
  --color-panel: #fffdf8;
  --color-navy: #172238;
  --color-navy-soft: #2b3a58;
  --color-green: #1f4d3a;
  --color-green-dark: #143327;
  --color-lime: #a9c744;
  --color-line: #d9d0ba;
  --color-line-strong: #b9ac8b;
  --max-width: 1120px;
  --radius: 4px;
  --font-body: -apple-system, "Apple SD Gothic Neo", "Malgun Gothic", "Segoe UI",
    Roboto, system-ui, "Noto Sans KR", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-navy);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

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

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-navy);
  color: #fff;
  padding: 12px 20px;
  z-index: 1000;
  border-radius: 0 0 var(--radius) 0;
  font-weight: 600;
}

.skip-link:focus {
  left: 0;
}

/* Focus visibility */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid var(--color-lime);
  outline-offset: 2px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-navy);
}

.brand-mark {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 0.01em;
}

.brand-sub {
  font-size: 0.72rem;
  color: var(--color-navy-soft);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius);
  cursor: pointer;
}

.nav-toggle svg {
  width: 22px;
  height: 22px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 24px;
}

.nav-links a {
  text-decoration: none;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--color-navy);
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
}

.nav-links a:hover {
  border-bottom-color: var(--color-green);
}

.lang-switch {
  display: flex;
  gap: 6px;
  border: 1px solid var(--color-line-strong);
  border-radius: 999px;
  padding: 3px;
  font-size: 0.82rem;
  font-weight: 700;
}

.lang-switch a {
  padding: 5px 12px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--color-navy-soft);
}

.lang-switch a[aria-current="true"] {
  background: var(--color-navy);
  color: #fff;
}

/* Hero */
.hero {
  padding: 64px 0 56px;
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
  border-bottom: 1px solid var(--color-line);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-green);
  margin-bottom: 18px;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--color-lime);
  display: inline-block;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.15;
  margin: 0 0 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.hero-lede {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: var(--color-navy-soft);
  max-width: 46ch;
  margin: 0 0 28px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.98rem;
  border: 2px solid transparent;
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.btn-primary {
  background: var(--color-green);
  color: #fff;
  border-color: var(--color-green);
}

.btn-primary:hover {
  background: var(--color-green-dark);
  border-color: var(--color-green-dark);
}

.btn-secondary {
  background: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}

.btn-secondary:hover {
  background: var(--color-navy);
  color: #fff;
}

.hint-text {
  font-size: 0.85rem;
  color: var(--color-navy-soft);
}

.hero-art {
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: 8px;
  padding: 24px;
}

.hero-art figcaption {
  margin-top: 12px;
  font-size: 0.78rem;
  color: var(--color-navy-soft);
  text-align: center;
}

/* Sections */
.section {
  padding: 64px 0;
}

.section-alt {
  background: var(--color-panel);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.section-head {
  max-width: 62ch;
  margin-bottom: 36px;
}

.section-head .eyebrow {
  margin-bottom: 10px;
}

.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  margin: 0 0 12px;
  font-weight: 800;
}

.section-head p {
  color: var(--color-navy-soft);
  margin: 0;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}

.fact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.fact-list > div {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 0.98rem;
}

.fact-list dt,
.fact-term {
  font-weight: 700;
  color: var(--color-green-dark);
}

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

.product-card {
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: 8px;
  padding: 28px 24px;
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--color-lime);
}

.product-icon {
  width: 46px;
  height: 46px;
  margin-bottom: 16px;
  color: var(--color-green);
}

.product-card h3 {
  font-size: 1.15rem;
  margin: 0 0 10px;
  font-weight: 800;
}

.product-card p {
  color: var(--color-navy-soft);
  margin: 0;
  font-size: 0.95rem;
}

/* Inquiry checklist */
.checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin-bottom: 28px;
}

.checklist li {
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: 8px;
  padding: 20px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.check-num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-navy);
  color: #fff;
  font-weight: 800;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.checklist h3 {
  margin: 0 0 4px;
  font-size: 1rem;
  font-weight: 800;
}

.checklist p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-navy-soft);
}

.note-box {
  border-left: 3px solid var(--color-green);
  background: var(--color-panel);
  padding: 16px 20px;
  font-size: 0.92rem;
  color: var(--color-navy-soft);
  border-radius: 0 6px 6px 0;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
}

.contact-card {
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: 8px;
  padding: 28px;
}

.contact-card h3 {
  margin: 0 0 18px;
  font-size: 1.2rem;
  font-weight: 800;
}

.contact-list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.contact-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 0.98rem;
}

.contact-list svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-green);
}

.contact-list a {
  text-decoration: underline;
  text-decoration-color: var(--color-line-strong);
}

.copy-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.btn-copy {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius);
  padding: 8px 14px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-navy);
  cursor: pointer;
}

.btn-copy:hover {
  border-color: var(--color-navy);
}

.btn-copy svg {
  width: 16px;
  height: 16px;
}

.copy-status {
  font-size: 0.82rem;
  color: var(--color-green-dark);
  min-height: 1.2em;
}

.copy-status[data-state="error"] {
  color: #8a3b1f;
}

.legal-card {
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: 8px;
  padding: 28px;
  font-size: 0.92rem;
  color: var(--color-navy-soft);
}

.legal-card h3 {
  color: var(--color-navy);
  font-size: 1.05rem;
  margin: 0 0 12px;
}

/* Footer */
.site-footer {
  background: var(--color-navy);
  color: #e7e4da;
  padding: 44px 0 28px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
  margin-bottom: 28px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.footer-brand .brand-mark {
  width: 34px;
  height: 34px;
}

.site-footer h4 {
  color: #fff;
  font-size: 0.95rem;
  margin: 0 0 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.footer-legal-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: 0.88rem;
  color: #c7c3b6;
}

.footer-nav {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.footer-nav a {
  text-decoration: none;
  color: #c7c3b6;
  font-size: 0.92rem;
}

.footer-nav a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  padding-top: 18px;
  font-size: 0.82rem;
  color: #a7a394;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
}

/* 404 page */
.error-page {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px;
  gap: 16px;
}

.error-page h1 {
  font-size: clamp(2rem, 6vw, 3rem);
  margin: 0;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-inner,
  .about-grid,
  .contact-grid,
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .product-grid {
    grid-template-columns: 1fr 1fr;
  }

  .hero-art {
    max-width: 540px;
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-line);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    gap: 18px;
    display: none;
  }

  .main-nav.is-open {
    display: flex;
  }

  .nav-links {
    flex-direction: column;
    gap: 4px;
  }

  .nav-links a {
    display: block;
    padding: 12px 4px;
  }

  .lang-switch {
    align-self: flex-start;
  }

  .site-header {
    position: sticky;
  }

  .header-inner {
    position: relative;
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .fact-list > div {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}

/* Final responsive and semantic refinements */
h1,h2,h3,p{word-break:keep-all;overflow-wrap:break-word}
section[id]{scroll-margin-top:100px}
.hero-art{margin:0}
.hero-art img{width:100%;height:auto}
.fact-list dd{margin:0;overflow-wrap:anywhere}
.footer-legal-list a{color:inherit}
@media(max-width:480px){.container{padding-left:20px;padding-right:20px}.hero{padding-top:36px}.hero-inner{gap:28px}.hero-art{padding:16px}.section{padding:44px 0}.contact-card,.legal-card{padding:22px}.btn{padding:12px 16px}.hero h1{line-height:1.3}.brand-sub{font-size:.65rem}}