/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

/* ── Variables ── */
:root {
  --sidebar-w: 210px;
  --accent: #6b5ce7;
  --text: #1a1a1a;
  --muted: #999;
  --border: #ebebeb;
  --bg: #fff;
  --font: 'Inter', 'Noto Sans KR', sans-serif;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  display: flex;
  min-height: 100vh;
}

/* ══════════════════════════════════════
   SIDEBAR — 데스크탑
══════════════════════════════════════ */
.sidebar {
  width: var(--sidebar-w);
  position: fixed;
  top: 0; left: 0; bottom: 0;
  padding: 40px 24px;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--bg);
  z-index: 100;
}

.sidebar-top {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.tagline {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.9;
  font-weight: 300;
}

.logo {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text);
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding-bottom: 40px;
}

.sidebar-nav a {
  font-size: 13px;
  font-weight: 300;
  color: var(--text);
  transition: color .2s;
}
.sidebar-nav a:hover { color: var(--accent); }

/* ══════════════════════════════════════
   MOBILE HEADER
══════════════════════════════════════ */
.mobile-header {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 50px;
  padding: 0 20px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  align-items: center;
  justify-content: space-between;
  z-index: 200;
}

.ham-btn {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}
.ham-btn span {
  display: block;
  width: 20px;
  height: 1px;
  background: var(--text);
  transition: transform .25s, opacity .25s;
  transform-origin: center;
}
.ham-btn.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.ham-btn.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.ham-btn.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.mobile-nav {
  display: none;
  position: fixed;
  top: 50px; left: 0; right: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  z-index: 190;
  flex-direction: column;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  padding: 15px 20px;
  font-size: 14px;
  font-weight: 300;
  border-bottom: 1px solid var(--border);
}
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav a:hover { color: var(--accent); }

/* ══════════════════════════════════════
   MOBILE TAGLINE (모바일 전용 소개문구)
══════════════════════════════════════ */
.mobile-tagline {
  display: none;
  font-size: 11px;
  color: var(--muted);
  white-space: pre-line;
  line-height: 1.9;
  font-weight: 300;
  padding-bottom: 18px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--border);
}

/* ══════════════════════════════════════
   MAIN
══════════════════════════════════════ */
.main {
  margin-left: var(--sidebar-w);
  flex: 1;
  padding: 40px 32px 60px;
}

/* ══════════════════════════════════════
   PRODUCT GRID — 인스타그램 스타일 정방형
══════════════════════════════════════ */
.grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-cols-desktop, 3), 1fr);
  gap: 20px;
}

/* ══════════════════════════════════════
   PRODUCT CARD
══════════════════════════════════════ */
.card {
  display: block;
  cursor: pointer;
}

/* 정방형 이미지 컨테이너 */
.card-img-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: #f4f4f4;
}

.card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.card:hover .card-img-wrap img { transform: scale(1.04); }

/* 호버 오버레이 */
.card-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  opacity: 0;
  transition: background .3s ease, opacity .3s ease;
  color: #fff;
  text-align: center;
  padding: 12px;
}
.card:hover .card-overlay {
  background: rgba(0, 0, 0, 0.35);
  opacity: 1;
}

.overlay-name {
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 300;
  letter-spacing: 0.06em;
}

.badge {
  font-size: 10px;
  background: var(--accent);
  color: #fff;
  padding: 3px 10px;
  border-radius: 20px;
  font-weight: 400;
}

/* 카드 텍스트 */
.card-info {
  padding: 10px 2px 0;
}
.card-name {
  font-size: 12px;
  font-weight: 400;
  line-height: 1.5;
  margin-bottom: 2px;
}
.card-size {
  font-size: 11px;
  color: var(--muted);
}

/* ══════════════════════════════════════
   FOOTER
══════════════════════════════════════ */
.footer {
  margin-left: var(--sidebar-w);
  padding: 32px 32px 48px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--muted);
  line-height: 2.3;
  font-weight: 300;
}
.footer a { color: var(--accent); }
.copyright { margin-top: 16px; }

/* ══════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════ */

/* 태블릿 */
@media (max-width: 900px) {
  .grid {
    grid-template-columns: repeat(var(--grid-cols-mobile, 2), 1fr);
    gap: 12px;
  }
}

/* 모바일 */
@media (max-width: 768px) {
  body { display: block; }

  .sidebar { display: none; }

  .mobile-header { display: flex; }

  .main {
    margin-left: 0;
    padding: 66px 12px 48px;
  }

  .grid {
    grid-template-columns: repeat(var(--grid-cols-mobile, 2), 1fr);
    gap: 6px;
  }

  .mobile-tagline { display: block; }

  .card-info { padding: 6px 1px 0; }
  .card-name { font-size: 11px; }
  .card-size { font-size: 10px; }

  /* 모바일에서는 항상 오버레이 표시 */
  .card-overlay {
    background: rgba(0, 0, 0, 0.2);
    opacity: 1;
  }
  .overlay-name { font-size: 11px; }

  .footer {
    margin-left: 0;
    padding: 28px 16px 48px;
  }
}

/* 소형 모바일 */
@media (max-width: 400px) {
  .grid { gap: 4px; }
}

/* ══════════════════════════════════════
   ROLLING SYMBOL
══════════════════════════════════════ */
.rolling-symbol {
  display: inline-flex;
  animation: roll360 4s linear infinite;
  transform-origin: 50% 50%;
}

.rolling-symbol svg {
  display: block;
}

@keyframes roll360 {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* 데스크탑: 사이드바 하단 */
.sidebar-rolling {
  display: flex;
  justify-content: center;
  padding-bottom: 40px;
}

.sidebar-rolling .rolling-symbol svg {
  width: 36px;
  height: auto;
}

/* 모바일 standalone: 데스크탑에서 숨김 */
.rolling-wrap {
  display: none;
}

@media (max-width: 768px) {
  .rolling-wrap {
    display: flex;
    justify-content: center;
    padding: 48px 0;
  }

  .rolling-wrap .rolling-symbol svg {
    width: 44px;
    height: auto;
  }
}

/* ══════════════════════════════════════
   CURTAIN INTRO EFFECT
══════════════════════════════════════ */
.curtain-overlay {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  height: 100dvh;
  z-index: 10000;
  background: #2d2d2d;
  cursor: pointer;
  user-select: none;
  overflow: hidden;
  touch-action: none;
  overscroll-behavior: none;
}

.c-side {
  position: absolute;
  top: 0;
  bottom: 0;
  width: calc(50% - 2px);
  transition: transform 1s cubic-bezier(0.77, 0, 0.175, 1);
}
.c-left  { left: 0; }
.c-right { right: 0; }

.c-body {
  position: absolute;
  inset: 0;
  background: #C5E4F5;
}

.c-left .c-body {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 68px), calc(100% - 68px) 100%, 0 100%);
}

.c-fold-shd {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 74px;
  height: 74px;
  background: rgba(0, 0, 0, 0.22);
  clip-path: polygon(0 0, 0 100%, 100% 0);
  pointer-events: none;
}

.c-info {
  position: absolute;
  top: 40px;
  left: 24px;
  z-index: 1;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.c-info-tagline {
  font-family: var(--font);
  font-size: 11px;
  font-weight: 300;
  color: rgba(0, 0, 0, 0.42);
  line-height: 1.9;
  white-space: pre-line;
}

.c-info-brand {
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  color: rgba(0, 0, 0, 0.75);
  letter-spacing: 0.04em;
}

.curtain-hint {
  position: absolute;
  bottom: 18px;
  right: calc(50% + 8px);
  z-index: 1;
  color: rgba(255, 255, 255, 0.6);
  font-family: var(--font);
  font-size: 9px;
  font-weight: 300;
  letter-spacing: 0.18em;
  pointer-events: none;
  white-space: nowrap;
  animation: c-blink 2.5s ease-in-out infinite;
}

@keyframes c-blink {
  0%, 100% { opacity: 0.15; }
  50%       { opacity: 0.7; }
}

.curtain-overlay.open .c-left  { transform: translateX(-110%); }
.curtain-overlay.open .c-right { transform: translateX(110%); }
.curtain-overlay.gone { display: none; }