/* Shisang Textile — editorial textile house mockup */

:root {
  --ink: #1A1611;
  --ink-soft: #2D2822;
  --ivory: #F5F1E8;
  --paper: #EBE5D4;
  --wine: #6B1F2A;
  --wine-deep: #4E161F;
  --muted: #8B827A;
  --hair: rgba(26, 22, 17, 0.12);
  --hair-strong: rgba(26, 22, 17, 0.22);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Pretendard Variable', Pretendard, system-ui, sans-serif;
  letter-spacing: -0.02em;
  background-color: var(--ivory);
  color: var(--ink);
  font-feature-settings: 'ss01', 'ss02';
  -webkit-font-smoothing: antialiased;
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='400'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='0.85' numOctaves='2' seed='7'/%3E%3CfeColorMatrix values='0 0 0 0 0.102 0 0 0 0 0.086 0 0 0 0 0.067 0 0 0 0.035 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 400px 400px;
}

/* Typography scale — editorial */
.display-hero {
  font-family: 'Pretendard Variable', sans-serif;
  font-weight: 800;
  letter-spacing: -0.055em;
  line-height: 0.88;
}
.display-serif {
  font-family: 'Fraunces', 'Pretendard Variable', serif;
  font-variation-settings: "SOFT" 40, "opsz" 144;
}
.display-serif-italic {
  font-family: 'Fraunces', serif;
  font-style: italic;
  font-variation-settings: "SOFT" 80, "opsz" 144;
}
.mono { font-family: 'IBM Plex Mono', monospace; letter-spacing: 0; }

/* Thread / weave decorations */
.warp-line {
  background-image: linear-gradient(to right, var(--hair) 0 1px, transparent 1px 100%);
  background-size: 48px 100%;
}
.weft-line::after {
  content: '';
  display: block;
  height: 1px;
  background: var(--hair-strong);
}
.hair-top { border-top: 1px solid var(--hair-strong); }
.hair-bottom { border-bottom: 1px solid var(--hair-strong); }
.hair-left { border-left: 1px solid var(--hair-strong); }
.hair-right { border-right: 1px solid var(--hair-strong); }

/* Chapter marker — 章 style */
.chapter {
  font-family: 'Fraunces', serif;
  font-style: italic;
  font-variation-settings: "SOFT" 100, "opsz" 9, "wght" 400;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--wine);
}

/* Link underline animation — weft thread */
.link-weft {
  position: relative;
  padding-bottom: 2px;
}
.link-weft::after {
  content: '';
  position: absolute; left: 0; right: 0; bottom: 0;
  height: 1px; background: currentColor;
  transform: scaleX(0); transform-origin: right;
  transition: transform 0.45s cubic-bezier(.7,.1,.2,1);
}
.link-weft:hover::after,
.link-weft[data-active="true"]::after {
  transform: scaleX(1); transform-origin: left;
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.9s cubic-bezier(.2,.7,.2,1), transform 0.9s cubic-bezier(.2,.7,.2,1);
}
.reveal.in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }
.reveal[data-delay="4"] { transition-delay: 0.32s; }

/* Product card */
.product-card { position: relative; isolation: isolate; }
.product-card .img-wrap {
  overflow: hidden; position: relative;
  background: var(--paper);
}
.product-card .img-wrap img {
  transition: transform 1.2s cubic-bezier(.2,.7,.2,1), filter 0.6s ease;
  will-change: transform;
}
.product-card:hover .img-wrap img {
  transform: scale(1.04);
  filter: saturate(1.05);
}
.product-card .inq {
  transition: color 0.25s ease, background 0.25s ease;
}
.product-card:hover .inq { color: var(--wine); }

/* Kakao FAB */
.kakao-fab {
  position: fixed;
  right: clamp(16px, 3vw, 28px);
  bottom: clamp(16px, 3vw, 28px);
  z-index: 60;
  display: inline-flex; align-items: center; gap: 8px;
  background: #FAE100;
  color: #1A1400;
  padding: 12px 18px 12px 14px;
  border-radius: 999px;
  box-shadow: 0 14px 32px -10px rgba(26, 22, 17, 0.28), 0 2px 0 rgba(26,22,17,0.1);
  font-weight: 600; font-size: 14px; letter-spacing: -0.02em;
  border: 1px solid rgba(26,22,17,0.12);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.kakao-fab:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 40px -12px rgba(26, 22, 17, 0.32), 0 2px 0 rgba(26,22,17,0.12);
}
.kakao-fab::before {
  content: ''; position: absolute; inset: -1px;
  border-radius: 999px;
  border: 1px solid var(--wine);
  opacity: 0.35;
  pointer-events: none;
}
.kakao-fab svg { width: 18px; height: 18px; }

/* Vertical stroke decoration — warp */
.vstroke {
  position: relative;
}
.vstroke::before {
  content: '';
  position: absolute; top: 0; bottom: 0; left: 0;
  width: 1px; background: var(--hair-strong);
}

/* Timeline dot */
.tl-dot {
  width: 9px; height: 9px; border-radius: 999px;
  background: var(--wine);
  box-shadow: 0 0 0 4px var(--ivory), 0 0 0 5px var(--hair-strong);
}

/* Marquee-like supporting strip */
.tape {
  border-top: 1px solid var(--hair-strong);
  border-bottom: 1px solid var(--hair-strong);
  overflow: hidden;
}
.tape-track {
  display: inline-flex; gap: 48px;
  animation: tape-scroll 32s linear infinite;
  white-space: nowrap;
}
@keyframes tape-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* Menu overlay (mobile) */
.menu-overlay {
  position: fixed; inset: 0;
  background: var(--ivory);
  z-index: 50;
  transform: translateY(-100%);
  transition: transform 0.6s cubic-bezier(.7,.1,.2,1);
}
.menu-overlay.open { transform: translateY(0); }

/* Selection color */
::selection { background: var(--wine); color: var(--ivory); }

/* Focus visible */
:focus-visible { outline: 2px solid var(--wine); outline-offset: 3px; }

/* Fine-tune letter spacing for large display */
.kern-tight { letter-spacing: -0.06em; }
.kern-normal { letter-spacing: -0.02em; }
.kern-wide { letter-spacing: 0.18em; }

/* Responsive helpers */
@media (max-width: 768px) {
  .display-hero { letter-spacing: -0.045em; }
}