/* ==========================================================================
   Landing Page — 해청농원 두릅 홈페이지
   ========================================================================== */

@import url('../reset.css');
@import url('../design-system.css');

/* ── Base ── */
*, *::before, *::after { box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--f-sans);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: var(--lead-relaxed);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }

/* ── Container ── */
.container {
  width: 100%;
  max-width: var(--w-xl);
  margin-inline: auto;
  padding-inline: var(--sp-6);
}

/* ── Utility: Section ── */
.section { padding: var(--sp-24) 0; }
@media (max-width: 768px) { .section { padding: var(--sp-16) 0; } }

/* ── Eyebrow ── */
.eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-brand);
  margin-bottom: var(--sp-3);
}

/* ── Section Header ── */
.sec-head { text-align: center; margin-bottom: var(--sp-12); }
.sec-title {
  font-family: var(--f-serif);
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  font-weight: 600;
  line-height: var(--lead-tight);
  letter-spacing: -.02em;
  margin-bottom: var(--sp-4);
}
.sec-desc {
  font-size: var(--text-lg);
  color: var(--c-text-sub);
  line-height: var(--lead-relaxed);
}

/* ═══════════════════════════════════════
   BUTTONS
═══════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  border: none;
  cursor: pointer;
  font-family: var(--f-sans);
  font-weight: 600;
  letter-spacing: -.01em;
  text-decoration: none;
  border-radius: var(--r-full);
  transition: all var(--ease-base);
  white-space: nowrap;
  line-height: 1;
}
.btn--sm  { padding: 10px 20px; font-size: var(--text-sm); }
.btn--md  { padding: 14px 28px; font-size: var(--text-base); }
.btn--lg  { padding: 16px 36px; font-size: var(--text-lg); }
.btn--xl  { padding: 20px 44px; font-size: var(--text-xl); }

.btn--primary { background: var(--c-brand); color: #fff; }
.btn--primary:hover {
  background: var(--c-brand-dark);
  transform: translateY(-2px);
  box-shadow: var(--sh-md);
}
.btn--primary:active { transform: translateY(0); }

.btn--ghost {
  background: transparent;
  color: var(--c-text);
  border: 1.5px solid var(--c-border);
}
.btn--ghost:hover {
  border-color: var(--c-text-sub);
  background: var(--c-bg-alt);
}

.btn--outline {
  background: transparent;
  color: var(--c-brand);
  border: 1.5px solid var(--c-brand);
}
.btn--outline:hover { background: var(--c-brand); color: #fff; }

/* Dark surface buttons */
.btn--ghost-inv {
  background: transparent;
  color: var(--c-text-inv);
  border: 1.5px solid rgba(255,255,255,.25);
}
.btn--ghost-inv:hover { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.5); }

/* ═══════════════════════════════════════
   NAVIGATION
═══════════════════════════════════════ */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-h);
  transition: background var(--ease-base), box-shadow var(--ease-base), border-color var(--ease-base);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(var(--c-text-inv-rgb),.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-color: var(--c-border-light);
  box-shadow: var(--sh-sm);
}
.nav__inner {
  max-width: var(--w-xl);
  margin-inline: auto;
  padding-inline: var(--sp-6);
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--sp-8);
}
.nav__logo {
  display: flex;
  flex-direction: column;
  line-height: 1;
  flex-shrink: 0;
}
.nav__logo-main {
  font-family: var(--f-serif);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: -.02em;
}
.nav__logo-sub {
  font-size: 10px;
  color: var(--c-text-muted);
  letter-spacing: .06em;
  margin-top: 2px;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
  margin-left: auto;
}
.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--c-text-sub);
  transition: color var(--ease-fast);
}
.nav__link:hover { color: var(--c-text); }
.nav__cta { margin-left: var(--sp-4); }

/* Hamburger */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  margin-left: auto;
  padding: 4px;
}
.nav__toggle span {
  display: block;
  height: 1.5px;
  background: var(--c-text);
  border-radius: 2px;
  transition: all var(--ease-base);
  transform-origin: center;
}
.nav__toggle.active span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__toggle.active span:nth-child(2) { opacity: 0; }
.nav__toggle.active span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile drawer */
.nav__drawer {
  position: fixed;
  inset: var(--nav-h) 0 auto 0;
  z-index: 99;
  background: var(--c-bg-card);
  border-bottom: 1px solid var(--c-border);
  padding: var(--sp-4);
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  transform: translateY(-110%);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--ease-base), opacity var(--ease-base);
  box-shadow: var(--sh-lg);
}
.nav__drawer.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.nav__drawer a {
  padding: var(--sp-3) var(--sp-4);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--c-text);
  border-radius: var(--r-md);
  transition: background var(--ease-fast);
}
.nav__drawer a:hover { background: var(--c-bg-alt); }

/* ═══════════════════════════════════════
   HERO
═══════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(160deg, var(--c-bg) 55%, var(--c-bg-alt) 100%);
}
.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 70% 60% at 75% 40%, rgba(var(--c-brand-rgb),.08) 0%, transparent 70%),
    radial-gradient(ellipse 50% 50% at 20% 80%, rgba(var(--c-gold-rgb),.06) 0%, transparent 60%);
}
.hero__inner {
  position: relative;
  width: 100%;
  max-width: var(--w-xl);
  margin-inline: auto;
  padding: calc(var(--nav-h) + var(--sp-20)) var(--sp-6) var(--sp-20);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-16);
  align-items: center;
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-brand);
  margin-bottom: var(--sp-6);
}
.hero__eyebrow::before {
  content: '';
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--c-brand);
  border-radius: 2px;
}
.hero__title {
  font-family: var(--f-serif);
  font-size: clamp(2.5rem, 5.5vw, 4.5rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -.03em;
  color: var(--c-text);
  margin-bottom: var(--sp-6);
}
.hero__title em {
  font-style: normal;
  color: var(--c-brand);
}
.hero__desc {
  font-size: var(--text-lg);
  color: var(--c-text-sub);
  line-height: var(--lead-relaxed);
  margin-bottom: var(--sp-10);
}
.hero__actions { display: flex; gap: var(--sp-4); flex-wrap: wrap; align-items: center; }

/* Hero image */
.hero__visual {
  display: flex;
  justify-content: flex-end;
  align-items: center;
}
.hero__visual-wrap {
  position: relative;
  width: 100%;
  max-width: 500px;
  aspect-ratio: 4/3;
  border-radius: var(--r-2xl);
  overflow: hidden;
  box-shadow: var(--sh-xl);
}
.hero__visual-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Hero slider */
.hero__slider {
  position: relative;
  width: 100%;
  height: 100%;
}
.hero__slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1s ease;
}
.hero__slide.active {
  opacity: 1;
}
.hero__visual-badge {
  position: absolute;
  bottom: var(--sp-5);
  left: var(--sp-5);
  background: rgba(var(--c-bg-dark-rgb),.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: #fff;
  padding: var(--sp-3) var(--sp-5);
  border-radius: var(--r-md);
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.hero__visual-badge span { font-size: var(--text-xs); color: rgba(255,255,255,.6); letter-spacing: .06em; }
.hero__visual-badge strong { font-size: var(--text-sm); font-weight: 700; }

/* Scroll indicator */
.hero__scroll {
  position: absolute;
  bottom: var(--sp-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-2);
  color: var(--c-text-muted);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.hero__scroll-line {
  width: 1px;
  height: 36px;
  background: linear-gradient(to bottom, var(--c-border), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%,100% { opacity: .4; }
  50% { opacity: 1; }
}

/* ═══════════════════════════════════════
   TRUST BAR
═══════════════════════════════════════ */
.trust-bar {
  background: var(--c-bg-card);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}
.trust-bar__inner {
  max-width: var(--w-xl);
  margin-inline: auto;
  padding: var(--sp-6) var(--sp-6);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-4);
}
.trust-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
  color: var(--c-text-sub);
}
.trust-item svg { flex-shrink: 0; color: var(--c-brand); }
.trust-item span { font-size: var(--text-sm); font-weight: 600; }

/* ═══════════════════════════════════════
   PRODUCTS
═══════════════════════════════════════ */
.products { background: var(--c-bg); }
.products__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-6);
  max-width: 820px;
  margin: 0 auto var(--sp-12);
}
.prod-card {
  background: var(--c-bg-card);
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--c-border-light);
  box-shadow: var(--sh-xs);
  transition: transform var(--ease-base), box-shadow var(--ease-base), border-color var(--ease-base);
}
.prod-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--sh-lg);
  border-color: var(--c-brand-muted);
}
.prod-card--featured {
  border-color: var(--c-brand);
  box-shadow: 0 0 0 2px var(--c-brand), var(--sh-md);
}
.prod-card--featured:hover { box-shadow: 0 0 0 2px var(--c-brand), var(--sh-xl); }

.prod-card__img {
  position: relative;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: var(--c-bg-alt);
}
.prod-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--ease-slow);
}
.prod-card:hover .prod-card__img img { transform: scale(1.06); }
.prod-card__tag {
  position: absolute;
  top: var(--sp-2);
  left: var(--sp-2);
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 700;
  border-radius: var(--r-sm);
  letter-spacing: .04em;
  background: var(--c-brand);
  color: #fff;
}
.prod-card__tag--gold { background: var(--c-gold); }

.prod-card__body { padding: var(--sp-4); }
.prod-card__name {
  font-family: var(--f-serif);
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--sp-1);
}
.prod-card__detail { font-size: var(--text-xs); color: var(--c-text-muted); margin-bottom: var(--sp-2); }
.prod-card__price { font-size: var(--text-xl); font-weight: 700; }
.prod-card__price span { font-size: var(--text-sm); font-weight: 400; color: var(--c-text-muted); }

.products__cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-4);
}

.size-compare {
  max-width: 820px;
  margin: 0 auto var(--sp-12);
  background: var(--c-bg-card);
  border: 1px solid var(--c-border-light);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  box-shadow: var(--sh-xs);
  text-align: center;
}
.size-compare img {
  width: 100%;
  max-width: 640px;
  height: auto;
  margin: 0 auto;
  border-radius: var(--r-md);
}
.size-compare figcaption {
  margin-top: var(--sp-4);
  font-size: var(--text-sm);
  color: var(--c-text-muted);
  letter-spacing: -.01em;
}

/* ═══════════════════════════════════════
   INFO CARDS
═══════════════════════════════════════ */
.info-sec { background: var(--c-bg-alt); }
.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
}
.info-card {
  background: var(--c-bg-card);
  border-radius: var(--r-lg);
  padding: var(--sp-8);
  border: 1px solid var(--c-border-light);
  box-shadow: var(--sh-xs);
}
.info-card__icon { font-size: 2rem; margin-bottom: var(--sp-5); line-height: 1; }
.info-card h3 {
  font-family: var(--f-serif);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--sp-4);
}
.info-card ul { display: flex; flex-direction: column; gap: var(--sp-2); }
.info-card li {
  font-size: var(--text-sm);
  color: var(--c-text-sub);
  padding-left: var(--sp-4);
  position: relative;
  line-height: var(--lead-relaxed);
}
.info-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--c-brand);
}

/* ═══════════════════════════════════════
   STORY
═══════════════════════════════════════ */
.story { background: var(--c-bg); }
.story__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-16);
  align-items: center;
}
.story__text { display: flex; flex-direction: column; }
.story__text .eyebrow { align-self: flex-start; }
.story__title {
  font-family: var(--f-serif);
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  font-weight: 600;
  line-height: var(--lead-tight);
  letter-spacing: -.025em;
  margin-bottom: var(--sp-6);
}
.story__body {
  font-size: var(--text-lg);
  color: var(--c-text-sub);
  line-height: var(--lead-relaxed);
  margin-bottom: var(--sp-5);
}
.story__actions { margin-top: var(--sp-8); display: flex; gap: var(--sp-4); }
.story__img {
  position: relative;
  border-radius: var(--r-2xl);
  overflow: hidden;
  aspect-ratio: 4/3;
  box-shadow: var(--sh-xl);
}
.story__img img { width: 100%; height: 100%; object-fit: cover; }
.story__img-decor {
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(var(--c-brand-rgb),.12) 0%, transparent 50%);
  pointer-events: none;
}

/* ═══════════════════════════════════════
   CTA BANNER
═══════════════════════════════════════ */
.cta-banner {
  background: var(--c-bg-dark);
  padding: var(--sp-24) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 80% at 50% 50%, rgba(var(--c-brand-rgb),.18) 0%, transparent 70%);
  pointer-events: none;
}
.cta-banner__inner { position: relative; }
.cta-banner__title {
  font-family: var(--f-serif);
  font-size: clamp(var(--text-2xl), 4vw, var(--text-5xl));
  font-weight: 600;
  color: var(--c-text-inv);
  line-height: var(--lead-tight);
  letter-spacing: -.025em;
  margin-bottom: var(--sp-4);
}
.cta-banner__desc {
  font-size: var(--text-lg);
  color: rgba(var(--c-text-inv-rgb),.6);
  margin-bottom: var(--sp-10);
}
.cta-banner__actions { display: flex; align-items: center; justify-content: center; gap: var(--sp-4); flex-wrap: wrap; }

/* ═══════════════════════════════════════
   FOOTER
═══════════════════════════════════════ */
.footer {
  background: var(--c-bg-dark);
  border-top: 1px solid rgba(255,255,255,.07);
  padding: var(--sp-16) 0 var(--sp-8);
  color: var(--c-text-inv);
}
.footer__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--sp-16);
  margin-bottom: var(--sp-12);
  align-items: start;
}
.footer__logo {
  font-family: var(--f-serif);
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--sp-3);
  letter-spacing: -.02em;
}
.footer__tagline { font-size: var(--text-sm); color: rgba(var(--c-text-inv-rgb),.5); margin-bottom: var(--sp-2); }
.footer__addr { font-size: var(--text-sm); color: rgba(var(--c-text-inv-rgb),.35); line-height: var(--lead-relaxed); }
.footer__links { display: flex; gap: var(--sp-12); }
.footer__col { display: flex; flex-direction: column; gap: var(--sp-3); }
.footer__col h4 {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: rgba(var(--c-text-inv-rgb),.35);
  margin-bottom: var(--sp-1);
}
.footer__col a {
  font-size: var(--text-sm);
  color: rgba(var(--c-text-inv-rgb),.65);
  transition: color var(--ease-fast);
}
.footer__col a:hover { color: var(--c-text-inv); }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.07);
  padding-top: var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}
.footer__bottom p { font-size: var(--text-xs); color: rgba(var(--c-text-inv-rgb),.3); }

/* ═══════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════ */
@media (max-width: 1024px) {
  .products__grid { gap: var(--sp-5); }
}

@media (max-width: 768px) {
  :root { --nav-h: 56px; }

  .nav__links, .nav__cta { display: none; }
  .nav__toggle { display: flex; }

  .hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: calc(var(--nav-h) + var(--sp-10));
    gap: var(--sp-10);
  }
  .hero__visual { order: -1; }
  .hero__visual-wrap { max-width: 340px; margin-inline: auto; }
  .hero__actions { justify-content: center; }
  .hero__eyebrow { display: inline-flex; }
  .hero__scroll { display: none; }

  .trust-bar__inner { grid-template-columns: repeat(2, 1fr); gap: var(--sp-5) var(--sp-4); }
  .trust-item { justify-content: flex-start; }

  .products__grid { grid-template-columns: repeat(2, 1fr); }

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

  .story__inner { grid-template-columns: 1fr; gap: var(--sp-10); }
  .story__img { order: -1; }

  .footer__inner { grid-template-columns: 1fr; gap: var(--sp-10); }
  .footer__links { flex-wrap: wrap; gap: var(--sp-8); }
}

@media (max-width: 480px) {
  .products__grid { grid-template-columns: repeat(2, 1fr); gap: var(--sp-3); }
  .products__cta { flex-direction: column; }
  .cta-banner__actions { flex-direction: column; }
  .story__actions { flex-direction: column; }
  .trust-bar__inner { gap: var(--sp-4) var(--sp-2); }
}