/* ============================================================
   Layout — nav, hero, sections, footer
============================================================ */

/* Top Nav — thin, sticky, editorial */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 18px var(--gutter);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--s-6);
  backdrop-filter: blur(14px) saturate(120%);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  background: linear-gradient(180deg, rgba(6,5,4,.75), rgba(6,5,4,.3) 80%, transparent);
  transition: background var(--dur-med), border-color var(--dur-med);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(6,5,4,.92);
  border-bottom-color: var(--surface-line-soft);
}
.nav-brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  color: var(--gold-100);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: 0.36em;
  text-transform: uppercase;
}
.nav-brand .mark {
  display: inline-block;
  width: 7px; height: 7px;
  background: var(--gold-300);
  transform: rotate(45deg);
  margin-right: 6px;
}
.nav-brand .sub {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  letter-spacing: 0.02em;
  font-size: 13px;
  color: var(--ink-400);
  text-transform: none;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--s-7);
  justify-content: center;
}
.nav-link {
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-300);
  text-decoration: none;
  padding: 6px 2px;
  position: relative;
  cursor: pointer;
  background: none;
  border: 0;
  font-family: inherit;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: var(--gold-300);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-fast) var(--ease-out-cubic);
}
.nav-link:hover { color: var(--gold-100); }
.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}
.nav-link.active { color: var(--gold-100); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--s-4);
  justify-content: flex-end;
}
.icon-btn {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border: 1px solid var(--surface-line);
  border-radius: 999px;
  background: transparent;
  color: var(--ink-300);
  cursor: pointer;
  transition: all var(--dur-fast);
  position: relative;
}
.icon-btn:hover {
  border-color: var(--gold-300);
  color: var(--gold-100);
}
.icon-btn .dot {
  position: absolute;
  top: 7px; right: 7px;
  width: 6px; height: 6px;
  background: var(--gold-300);
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--surface-0);
}
.nav-concierge {
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-400);
  display: flex;
  align-items: center;
  gap: var(--s-2);
}
.nav-concierge .live {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--sig-live);
  box-shadow: 0 0 0 3px rgba(230,197,93,.18);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(230,197,93,.18); }
  50% { box-shadow: 0 0 0 6px rgba(230,197,93,0); }
}

/* ==========================================================
   HERO
========================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  padding-top: 96px;
  padding-bottom: var(--s-9);
  display: flex;
  align-items: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 100%, rgba(201,169,97,.08), transparent 60%),
    linear-gradient(180deg, var(--surface-0) 0%, rgba(6,5,4,.3) 40%, rgba(6,5,4,.88) 90%, var(--surface-0));
  z-index: 2;
}
.hero-bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.55;
  filter: grayscale(20%) contrast(1.05) brightness(.85);
  transform: scale(1.05);
  transition: transform 1.5s var(--ease-out-cubic);
}
.hero.loaded .hero-bg img { transform: scale(1); }

.hero-inner {
  position: relative;
  z-index: 3;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-8);
}
.hero-top {
  display: flex;
  align-items: center;
  gap: var(--s-5);
  flex-wrap: wrap;
}
.hero-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  padding: 8px 14px;
  border: 1px solid var(--surface-line);
  border-radius: 999px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-300);
  background: rgba(12,11,9,.4);
  backdrop-filter: blur(8px);
}
.hero-chip .live {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--sig-live);
  box-shadow: 0 0 0 3px rgba(230,197,93,.16);
  animation: pulse 2.4s infinite;
}
.hero-chip.gold {
  border-color: var(--gold-500);
  color: var(--gold-200);
}

.hero-title {
  font-size: clamp(64px, 12vw, 188px);
  line-height: 0.88;
  letter-spacing: -0.045em;
  color: var(--ink-100);
  font-weight: 500;
  font-family: var(--font-serif-kr);
}
.hero-title .accent {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  color: var(--gold-200);
  letter-spacing: -0.02em;
}
.hero-title .dot-end {
  color: var(--gold-300);
  font-family: var(--font-display);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--s-9);
  align-items: end;
}
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; gap: var(--s-6); }
}
.hero-lede {
  font-family: var(--font-serif-kr);
  font-size: clamp(15px, 1.2vw, 17px);
  line-height: 1.7;
  color: var(--ink-300);
  max-width: 42ch;
  border-left: 1px solid var(--gold-500);
  padding-left: var(--s-5);
}
.hero-lede em {
  color: var(--gold-200);
  font-style: italic;
  font-family: var(--font-display);
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-5);
  max-width: 520px;
}
.hero-meta .m {
  border-top: 1px solid var(--surface-line);
  padding-top: var(--s-3);
}
.hero-meta .k {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--gold-300);
  font-size: 12px;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}
.hero-meta .v {
  font-family: var(--font-serif-kr);
  color: var(--ink-100);
  font-size: 20px;
  letter-spacing: -0.01em;
  line-height: 1.15;
}
.hero-meta .v small {
  display: block;
  font-family: var(--font-sans);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-500);
  margin-top: 4px;
}

.hero-cta-row {
  display: flex;
  gap: var(--s-4);
  flex-wrap: wrap;
}

.hero-scroll-hint {
  position: absolute;
  bottom: var(--s-6);
  left: 50%;
  transform: translateX(-50%);
  z-index: 4;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-3);
  color: var(--ink-500);
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}
.hero-scroll-hint .line {
  width: 1px;
  height: 48px;
  background: linear-gradient(180deg, transparent, var(--gold-300));
  animation: scroll-line 2.4s infinite;
}
@keyframes scroll-line {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  50.01% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ==========================================================
   SECTION SCAFFOLD
========================================================== */
.section {
  position: relative;
  padding: var(--s-10) 0;
}
.section-head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--s-5);
  align-items: baseline;
  margin-bottom: var(--s-8);
  padding-bottom: var(--s-4);
  border-bottom: 1px solid var(--surface-line);
}
.section-head .num {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--gold-300);
  font-size: 16px;
}
.section-head .title {
  font-family: var(--font-serif-kr);
  font-size: clamp(32px, 4.4vw, 64px);
  color: var(--ink-100);
  line-height: 1;
  letter-spacing: -0.03em;
}
.section-head .title .en {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  color: var(--gold-200);
}
.section-head .tail {
  color: var(--ink-500);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}
@media (max-width: 720px) {
  .section-head { grid-template-columns: 1fr; }
  .section-head .tail { display: none; }
}

/* ==========================================================
   TWEAKS PANEL
========================================================== */
.tweaks {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 200;
  width: 300px;
  background: rgba(12,11,9,.94);
  backdrop-filter: blur(18px);
  border: 1px solid var(--surface-line);
  border-radius: 6px;
  padding: var(--s-5);
  box-shadow: var(--shadow-lift);
  transform: translateY(calc(100% + 24px));
  opacity: 0;
  pointer-events: none;
  transition: transform var(--dur-med) var(--ease-out-cubic), opacity var(--dur-med);
  font-family: var(--font-sans);
}
.tweaks.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.tweaks h4 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  color: var(--gold-200);
  font-size: 14px;
  margin: 0 0 var(--s-4);
  padding-bottom: var(--s-3);
  border-bottom: 1px solid var(--surface-line);
  letter-spacing: 0.06em;
}
.tweak-row {
  margin-bottom: var(--s-4);
}
.tweak-label {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-500);
  margin-bottom: var(--s-2);
}
.tweak-options {
  display: flex;
  gap: 6px;
}
.tweak-chip {
  flex: 1;
  background: transparent;
  border: 1px solid var(--surface-line);
  color: var(--ink-400);
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 8px 6px;
  cursor: pointer;
  transition: all var(--dur-fast);
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.tweak-chip .swatch {
  width: 10px; height: 10px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.1);
}
.tweak-chip:hover {
  border-color: var(--gold-400);
  color: var(--ink-200);
}
.tweak-chip.on {
  border-color: var(--gold-300);
  color: var(--gold-100);
  background: rgba(201,169,97,.06);
}

/* ==========================================================
   FOOTER
========================================================== */
.site-footer {
  border-top: 1px solid var(--surface-line);
  padding: var(--s-9) 0 var(--s-6);
  margin-top: var(--s-10);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--s-7);
  margin-bottom: var(--s-8);
}
@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
.footer-col h5 {
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold-300);
  margin: 0 0 var(--s-4);
  font-weight: 500;
  font-family: var(--font-sans);
}
.footer-col a, .footer-col p {
  display: block;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-400);
  text-decoration: none;
  transition: color var(--dur-fast);
}
.footer-col a:hover { color: var(--gold-100); }
.footer-brand {
  font-family: var(--font-display);
  font-size: 34px;
  letter-spacing: 0.24em;
  color: var(--gold-100);
  margin-bottom: var(--s-4);
  line-height: 1;
}
.footer-brand .it {
  font-style: italic;
  color: var(--ink-400);
  font-size: 22px;
  letter-spacing: 0.02em;
  display: block;
  margin-top: 6px;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--s-5);
  border-top: 1px solid var(--surface-line);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-500);
}