/* ─── Variables ─────────────────────────────────────────────────── */
:root {
  --white:   #ffffff;
  --bg:      #f7f7f5;
  --border:  #e8e8e4;
  --text:    #1a1a1a;
  --muted:   #767676;
  --muted-2: #b0b0a8;
  --dark:    #111111;
  --accent:  #1a56db;
  --accent-h:#1346c4;

  --font: 'DM Sans', 'Noto Sans KR', system-ui, sans-serif;
  --nav-h: 64px;
  --container: 1160px;
}

/* ─── Reset ─────────────────────────────────────────────────────── */
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font); color: var(--text); background: var(--white);
       -webkit-font-smoothing: antialiased; line-height: 1.6; }
img  { display: block; max-width: 100%; }
a    { text-decoration: none; color: inherit; }
ul   { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; }

/* ─── Container ─────────────────────────────────────────────────── */
.container { max-width: var(--container); margin: 0 auto; padding: 0 32px; }

/* ─── Buttons ───────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 8px;
  font-size: 0.9rem; font-weight: 500; letter-spacing: -0.01em;
  transition: all 0.18s ease; white-space: nowrap;
}
.btn--primary { background: var(--accent); color: var(--white); }
.btn--primary:hover { background: var(--accent-h); }
.btn--outline {
  background: transparent; color: var(--text);
  border: 1.5px solid var(--border);
}
.btn--outline:hover { border-color: #aaa; background: var(--bg); }
.btn--full { width: 100%; justify-content: center; padding: 14px; }
.btn--nav {
  background: var(--accent); color: var(--white);
  padding: 8px 18px; font-size: 0.84rem;
}
.btn--nav:hover { background: var(--accent-h); }

/* ─── NAV ───────────────────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  height: var(--nav-h);
  background: rgba(255,255,255,.0);
  transition: background .25s, box-shadow .25s;
}
.nav.scrolled {
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border);
}
.nav__inner {
  max-width: var(--container); margin: 0 auto; padding: 0 32px;
  height: 100%; display: flex; align-items: center; gap: 32px;
}

/* Logo */
.nav__logo { display: flex; align-items: center; }
.nav__logo-img { height: 32px; width: auto; display: block; }

.nav__links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav__links a {
  font-size: 0.88rem; font-weight: 400; color: var(--muted);
  padding: 6px 14px; border-radius: 7px; transition: color .15s, background .15s;
}
.nav__links a:hover { color: var(--dark); background: var(--bg); }

.nav__right { display: flex; align-items: center; gap: 8px; }
.lang-toggle {
  font-size: 0.78rem; font-weight: 600; letter-spacing: .06em;
  padding: 5px 11px; border-radius: 6px;
  border: 1px solid var(--border); color: var(--muted);
  transition: all .15s;
}
.lang-toggle:hover { color: var(--dark); border-color: #aaa; }
.nav__burger { display: none; flex-direction: column; gap: 5px; padding: 6px; }
.nav__burger span { display: block; width: 22px; height: 1.5px; background: var(--dark); border-radius: 2px; }

/* ─── HERO ──────────────────────────────────────────────────────── */
.hero {
  background: var(--white);
  min-height: 100vh;
  display: flex;
  align-items: center;
}
.hero__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
  padding-top: calc(var(--nav-h) + 40px);
  padding-bottom: 80px;
  width: 100%;
}
.hero__location {
  font-size: 0.75rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 20px;
}
.hero__title {
  font-size: clamp(2.2rem, 4vw, 3.2rem); font-weight: 700;
  line-height: 1.1; letter-spacing: -0.03em; color: var(--text);
  margin-bottom: 20px;
}
.hero__sub {
  font-size: 1rem; line-height: 1.75; color: var(--muted);
  max-width: 460px; margin-bottom: 36px;
}
.hero__actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 40px; }
.hero__stats {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  font-size: 0.8rem; color: var(--muted-2); letter-spacing: .02em;
}
.hero__stats-sep {
  width: 3px; height: 3px; border-radius: 50%; background: var(--border); flex-shrink: 0;
}
.hero__image {
  border-radius: 14px; overflow: hidden;
  box-shadow: 0 16px 48px rgba(0,0,0,.1);
}
.hero__image img {
  width: 100%; height: 520px; object-fit: cover; display: block;
}

/* ─── SECTION BASE ──────────────────────────────────────────────── */
.section { padding: 96px 0; }
.section__title {
  font-size: clamp(1.8rem, 3.2vw, 2.6rem); font-weight: 700;
  letter-spacing: -0.03em; line-height: 1.2; margin-bottom: 16px;
}
.section__title--light { color: var(--white); }
.section__head { margin-bottom: 52px; }
.section__sub {
  font-size: 1rem; line-height: 1.7; color: var(--muted); max-width: 560px;
}

/* ─── PRODUCTS ──────────────────────────────────────────────────── */
.products { background: var(--bg); }
.products__grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-bottom: 20px;
}
.brand-block {
  background: var(--white); border: 1px solid var(--border);
  border-radius: 14px; overflow: hidden;
  transition: box-shadow .2s, border-color .2s;
}
.brand-block:hover { box-shadow: 0 8px 40px rgba(0,0,0,.07); border-color: #d4d4cd; }
.brand-block__top { padding: 28px 28px 0; }
.brand-block__header {
  display: flex; align-items: center; gap: 12px; margin-bottom: 22px;
}
.brand-icon { width: 20px; height: 20px; color: var(--text); flex-shrink: 0; }
.brand-block__header h3 { font-size: 1.05rem; font-weight: 600; letter-spacing: -.01em; }
.model-list { display: flex; flex-direction: column; }
.model-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 11px 0; border-top: 1px solid var(--border); gap: 12px;
}
.model-name { font-size: 0.93rem; font-weight: 450; color: var(--text); }
.model-tag {
  font-size: 0.74rem; font-weight: 500; letter-spacing: .02em;
  color: var(--muted); background: var(--bg); border-radius: 4px;
  padding: 3px 8px; white-space: nowrap;
}
.model-note {
  padding: 14px 28px; margin-top: 4px; font-size: 0.78rem;
  color: var(--muted); background: var(--bg);
  border-top: 1px solid var(--border);
}

/* Grade cards */
.grades {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px;
}
.grade-card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: 14px; padding: 28px;
}
.grade-card--a { border-top: 3px solid #22c55e; }
.grade-card--b { border-top: 3px solid var(--accent); }
.grade-card__header { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.grade-badge {
  display: inline-flex; font-size: 0.72rem; font-weight: 700; letter-spacing: .07em;
  padding: 4px 11px; border-radius: 5px; text-transform: uppercase;
}
.grade-badge--a { background: #f0fdf4; color: #15803d; }
.grade-badge--b { background: #eff6ff; color: #1d4ed8; }
.grade-card__sub { font-size: 0.82rem; color: var(--muted); }
.grade-card ul { display: flex; flex-direction: column; gap: 8px; }
.grade-card li {
  font-size: 0.87rem; color: var(--text); padding-left: 18px; position: relative; line-height: 1.5;
}
.grade-card li::before { content: '·'; position: absolute; left: 5px; color: var(--muted-2); }

/* ─── PROCESS ───────────────────────────────────────────────────── */
.process { background: #0c1520; }
.process .section__title { margin-bottom: 52px; }
.process__steps {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.step {
  padding: 36px 32px; background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08); border-radius: 14px;
}
.step__title { font-size: 1.1rem; font-weight: 600; color: var(--white); margin-bottom: 14px; }
.step__desc { font-size: 0.9rem; line-height: 1.75; color: rgba(255,255,255,.5); font-weight: 300; }

/* ─── ABOUT ─────────────────────────────────────────────────────── */
.about { background: var(--white); }
.about__layout {
  display: grid; grid-template-columns: 1fr 360px; gap: 72px; align-items: start;
}
.about__text .section__title { margin-bottom: 20px; }
.about__text > p {
  font-size: 1rem; line-height: 1.8; color: #4a4a4a; margin-bottom: 20px;
}
.trust-list { display: flex; flex-direction: column; gap: 10px; margin-top: 32px; }
.trust-item { display: flex; align-items: flex-start; gap: 12px; }
.trust-check {
  width: 20px; height: 20px; border-radius: 50%; background: #f0fdf4;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.72rem; font-weight: 700; color: #22c55e;
  flex-shrink: 0; margin-top: 1px;
}
.trust-item span:last-child { font-size: 0.9rem; line-height: 1.6; color: var(--muted); }

/* Stats block */
.about__stats-block {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 16px; padding: 40px 36px;
  display: flex; flex-direction: column; gap: 36px;
}
.about__stat { display: flex; flex-direction: column; }
.about__stat-num {
  font-size: 2.4rem; font-weight: 700; letter-spacing: -.04em;
  color: var(--text); line-height: 1; margin-bottom: 6px;
}
.about__stat-acc { font-size: 1.5rem; color: var(--accent); }
.about__stat-label { font-size: 0.8rem; color: var(--muted); line-height: 1.5; }

/* ─── CONTACT ───────────────────────────────────────────────────── */
.contact { background: var(--bg); }
.contact__layout {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start;
}
.contact__desc { font-size: 1rem; line-height: 1.7; color: var(--muted); margin-bottom: 36px; }
.contact__methods { display: flex; flex-direction: column; gap: 12px; }
.contact__card {
  display: flex; align-items: center; gap: 16px;
  padding: 18px 20px; background: var(--white); border: 1px solid var(--border);
  border-radius: 12px; transition: border-color .15s, box-shadow .15s;
}
.contact__card:hover { border-color: var(--accent); box-shadow: 0 2px 16px rgba(26,86,219,.1); }
.contact__card-icon {
  width: 40px; height: 40px; border-radius: 10px;
  background: #eff6ff; display: flex; align-items: center; justify-content: center;
  color: var(--accent); flex-shrink: 0;
}
.contact__card-label { display: block; font-size: 0.72rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 2px; }
.contact__card-value { display: block; font-size: 0.9rem; font-weight: 500; color: var(--text); }
.contact__card-arrow { margin-left: auto; color: var(--muted-2); font-size: 1.1rem; transition: transform .15s; }
.contact__card:hover .contact__card-arrow { transform: translateX(3px); color: var(--accent); }

/* Form */
.contact__form {
  background: var(--white); border: 1px solid var(--border);
  border-radius: 16px; padding: 36px;
  display: flex; flex-direction: column; gap: 20px;
}
.form-row { display: flex; flex-direction: column; gap: 7px; }
.form-label { font-size: 0.82rem; font-weight: 500; color: var(--text); }
.form-input {
  padding: 11px 14px; border: 1.5px solid var(--border);
  border-radius: 8px; font-size: 0.9rem; color: var(--text);
  background: var(--bg); transition: border-color .15s, background .15s;
  outline: none;
}
.form-input:focus { border-color: var(--accent); background: var(--white); }
.form-input::placeholder { color: var(--muted-2); }
.form-textarea { resize: vertical; min-height: 100px; }
.form-note { font-size: 0.77rem; color: var(--muted); text-align: center; margin-top: -6px; }

/* ─── FOOTER ────────────────────────────────────────────────────── */
.footer {
  background: var(--dark); color: rgba(255,255,255,.5);
  padding: 56px 0 32px;
}
.footer__top {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 40px; margin-bottom: 48px; padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.07);
}
.footer__brand { max-width: 280px; }
.footer__logo-row { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.footer__badge {
  width: 30px; height: 30px; border-radius: 7px;
  background: var(--accent); display: flex; align-items: center; justify-content: center;
  font-size: 0.65rem; font-weight: 800; color: var(--white); letter-spacing: .04em;
  flex-shrink: 0; font-family: 'DM Sans', Arial, sans-serif;
}
.footer__wordmark { font-size: 0.85rem; font-weight: 700; letter-spacing: .1em; color: var(--white); }
.footer__tagline { font-size: 0.82rem; color: rgba(255,255,255,.3); line-height: 1.6; }
.footer__nav { display: flex; gap: 48px; }
.footer__nav-col { display: flex; flex-direction: column; gap: 10px; }
.footer__nav-head { font-size: 0.75rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: rgba(255,255,255,.3); margin-bottom: 4px; }
.footer__nav-col a { font-size: 0.85rem; color: rgba(255,255,255,.45); transition: color .15s; }
.footer__nav-col a:hover { color: var(--white); }
.footer__bottom p { font-size: 0.78rem; color: rgba(255,255,255,.2); }

/* ─── RESPONSIVE ────────────────────────────────────────────────── */
@media (max-width: 960px) {
  .hero__content { grid-template-columns: 1fr; gap: 40px; }
  .hero__image { order: -1; }
  .hero__image img { height: 340px; }
  .products__grid, .grades, .about__layout, .contact__layout { grid-template-columns: 1fr; }
  .about__sidebar { max-width: 460px; }
  .about__stats-block { flex-direction: row; flex-wrap: wrap; gap: 24px; padding: 28px; }
  .about__stat { flex: 1; min-width: 120px; }
  .process__steps { grid-template-columns: 1fr; }
  .footer__top { flex-direction: column; }
  .footer__nav { gap: 32px; }
}
@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .section { padding: 64px 0; }
  .nav__inner { padding: 0 20px; }
  .nav__links { display: none; }
  .nav__links.open {
    display: flex; flex-direction: column; position: fixed;
    inset: var(--nav-h) 0 0;
    background: rgba(255,255,255,.97); backdrop-filter: blur(12px);
    padding: 32px 24px; gap: 4px; z-index: 199;
  }
  .nav__links.open a { padding: 13px 16px; font-size: 1rem; color: var(--muted); }
  .nav__burger { display: flex; }
  .hero__content { padding-top: calc(var(--nav-h) + 24px); padding-bottom: 48px; }
  .hero__image img { height: 240px; }
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { justify-content: center; }
  .contact__form { padding: 24px; }
  .footer__nav { flex-direction: column; gap: 24px; }
}