/* =========================================================
   ARTISH · common.css
   Tokens · Reset · Layout · Typography · Buttons · Forms
   Header · Footer · A11y utilities
   ========================================================= */

/* ---------- CASCADE LAYERS — 명시도 전쟁 차단 ---------- */
@layer reset, base, layout, components, utilities, overrides;

/* ---------- DESIGN TOKENS ===== ARTISH GALLERY SYSTEM ===== ---------- */
:root {
  /* native form 컨트롤 컬러 (체크박스/라디오/select hint 등) */
  color-scheme: light;
  accent-color: #1A1A1A;
  caret-color: #1A1A1A;
  /* ===== BACKGROUND ===== */
  --color-bg: #F4F1EB;        /* 전체 배경 (전시관 공기) */
  --color-surface: #FFFFFF;   /* 작품 영역 / 프레임 */
  --color-floor: #EFEBE2;     /* 카드 살짝 가라앉히는 floor */

  /* ===== TEXT ===== */
  --color-text-main: #1A1A1A;
  --color-text-sub: #6B6B6B;
  --color-text-muted: #9A968E;

  /* ===== LINE ===== */
  --color-line: #E5E2DC;
  --color-line-soft: #EFEBE2;
  --color-border: #E5E2DC;

  /* ===== ACCENT ===== */
  --color-accent: #C6A96B;
  --color-accent-hover: #B89655;
  --color-accent-soft: #E9DDC2;

  /* ===== INTERACTION ===== */
  --color-hover: #000000;
  --color-focus: #1A1A1A;

  /* ===== aliases (기존 코드 호환) ===== */
  --bg-main: var(--color-bg);
  --bg-white: var(--color-surface);
  --bg: var(--color-bg);
  --bg-card: var(--color-surface);
  --bg-soft: var(--color-floor);
  --bg-dark: #1A1A1A;
  --text: var(--color-text-main);
  --text-soft: var(--color-text-sub);
  --text-muted: var(--color-text-muted);
  --text-on-dark: #F2F0EC;
  --primary: var(--color-text-main);
  --primary-hover: var(--color-hover);
  --primary-soft: var(--color-line-soft);
  --accent: var(--color-accent);
  --border: var(--color-line);
  --border-strong: var(--color-line);
  --warn: #B45309;

  /* Spacing scale */
  --space-4: 4px;
  --space-8: 8px;
  --space-12: 12px;
  --space-16: 16px;
  --space-24: 24px;
  --space-32: 32px;
  --space-40: 40px;
  --space-56: 56px;
  --space-80: 80px;
  --space-120: 120px;
  --space-160: 160px;

  /* Section — gallery breath */
  --section-y: 160px;
  --section-y-tablet: 120px;
  --section-y-mobile: 80px;

  /* Container */
  --container-max: 1440px;
  --container-pad-x: 24px;
  --container-pad-x-mobile: 16px;

  /* Typography — gallery muted hierarchy */
  --type-h1: 40px;
  --type-h2: 28px;     /* section-title (gallery scale) */
  --type-h3: 18px;
  --type-h4: 14px;
  --type-body: 14px;
  --type-desc: 14px;
  --type-caption: 12px;
  --type-price: 13px;
  --type-product: 14px;

  /* Radius */
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  /* Shadow */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.08);
  --shadow-dialog: 0 20px 48px rgba(14, 18, 30, 0.18);

  /* Transition */
  --t-fast: 150ms ease;
  --t: 200ms ease;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);

  /* Header */
  --header-height: 72px;
  --header-offset: 88px;

  /* Z-index */
  --z-header: 1000;
  --z-bar: 1100;
  --z-dialog: 1200;
  --z-skip: 9999;
}

/* ---------- RESET ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: "Pretendard", -apple-system, BlinkMacSystemFont, system-ui,
    "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  font-size: var(--type-body);
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body.no-scroll { overflow: hidden; }

ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
img, svg, video { display: block; max-width: 100%; height: auto; }
img { object-fit: cover; }

/* 깨진 이미지 (404) — gallery floor placeholder */
img {
  background: var(--color-floor);
  color: transparent;
  font-size: 0;
}
.icon-btn img,
.btn img,
.header-search-submit img {
  background: transparent;
}
.thumb img,
.card > img,
.hero-bg img,
.insta-grid img {
  background: linear-gradient(135deg, var(--color-floor) 0%, #E0DFDB 100%);
}
input, select, textarea { font: inherit; color: inherit; }

/* Focus ring */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Scroll margin for anchor jumps under sticky header */
main#main, section[id] { scroll-margin-top: var(--header-offset); }

/* ---------- PERFORMANCE — content-visibility로 off-screen 페인트 비용 절감 ---------- */
.section {
  content-visibility: auto;
  /* 대략적 섹션 높이 hint — 스크롤바 안정화 (under-estimate ok) */
  contain-intrinsic-size: 1px 600px;
}

/* ---------- SCROLL REVEAL — IntersectionObserver와 연동 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 700ms var(--ease), transform 700ms var(--ease);
}
.reveal.is-revealed {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- FORCED COLORS (Windows 고대비 모드) — 접근성 ---------- */
@media (forced-colors: active) {
  .btn, .icon-btn, .filter-chip, .filter-btn, select, input { forced-color-adjust: auto; }
  .card, .product-card { border: 1px solid CanvasText; }
  .hero-bg::after { background: none; }
}

/* ---------- 커스텀 스크롤바 (gallery — 미니멀) ---------- */
@supports selector(::-webkit-scrollbar) {
  ::-webkit-scrollbar { width: 10px; height: 10px; }
  ::-webkit-scrollbar-track { background: var(--color-bg); }
  ::-webkit-scrollbar-thumb {
    background: var(--color-line);
    border: 2px solid var(--color-bg);
    border-radius: 0;
  }
  ::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }
}
* { scrollbar-color: var(--color-line) var(--color-bg); scrollbar-width: thin; }

/* ---------- A11Y UTILITIES ---------- */
.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: fixed;
  top: -100px; left: 16px;
  z-index: var(--z-skip);
  padding: 12px 18px;
  background: var(--primary); color: #fff;
  font-size: 14px; font-weight: 600;
  border-radius: var(--radius-sm);
  transition: top var(--t);
}
.skip-link:focus, .skip-link:focus-visible { top: 16px; outline: none; }

/* ---------- LAYOUT ---------- */
.wrap { width: 100%; overflow-x: hidden; }

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad-x);
}
.container-sm { max-width: 880px; }

/* Section — gallery breath, hairline divider */
.section {
  padding: var(--section-y) 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
}
.section-soft { background: var(--color-floor); }
.section-dark { background: var(--bg-dark); color: var(--text-on-dark); border-bottom-color: rgba(255,255,255,0.08); }
.section-dark p { color: rgba(242, 240, 236, 0.72); }
.section-dark .eyebrow { color: var(--color-accent); }
.section-dark h3, .section-dark .card-title { color: #fff; }

/* Section head */
.section-head { margin-bottom: var(--space-56); max-width: 760px; }
.section-head-center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head-light, .section-head-light .section-title { color: #fff; }

.section-title {
  font-size: var(--type-h2);     /* 28px */
  font-weight: 500;              /* gallery — light */
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--color-text-main);
  margin-bottom: var(--space-24);
}
.section-desc {
  font-size: var(--type-desc);   /* 14px */
  color: var(--color-text-sub);
  line-height: 1.6;
}
.section-more { text-align: center; margin-top: var(--space-56); }

/* Grid */
.grid { display: grid; gap: var(--space-24); width: 100%; align-items: stretch; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
ul.grid > li, ul.product-grid > li, ul.insta-grid > li { min-width: 0; }

/* ---------- TYPOGRAPHY ---------- */
h1, h2, h3, h4 { font-weight: 600; line-height: 1.3; color: var(--text); }
h1 { font-size: var(--type-h1); font-weight: 700; }
h2 { font-size: 28px; }
h3 { font-size: var(--type-h3); }
h4 { font-size: var(--type-h4); font-weight: 500; }
p { font-size: var(--type-body); color: var(--text-soft); }

.serif { font-family: "Noto Serif KR", Georgia, serif; font-weight: 500; letter-spacing: -0.015em; }

.eyebrow {
  display: inline-block;
  margin-bottom: var(--space-16);
  font-size: var(--type-caption);
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--primary);
  text-transform: uppercase;
}
.label {
  display: inline-block;
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  text-transform: uppercase;
}
.badge {
  display: inline-block;
  padding: 5px 11px;
  font-size: 10px; font-weight: 700;
  letter-spacing: 0.1em;
  background: var(--primary); color: #fff;
  border-radius: var(--radius-pill);
  text-transform: uppercase;
}

/* ---------- CARD — GALLERY (chrome 제거, 작품·이미지 자체로 정렬) ---------- */
.card {
  position: relative;
  background: transparent;
  border: 0;
  border-radius: 0;
  padding: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-16);
  transition: transform var(--t), opacity var(--t);
}
.card:hover { transform: none; box-shadow: none; }
@media (prefers-reduced-motion: reduce) {
  .card { transition: none; }
}

a.card { color: inherit; }
.card-body { display: flex; flex-direction: column; gap: var(--space-8); padding: 0; }
.card-title { display: block; font-size: 16px; font-weight: 500; line-height: 1.4; color: var(--color-text-main); letter-spacing: -0.005em; }
.card-detail { font-size: 12px; color: var(--color-text-muted); }

/* ---------- BUTTONS — GALLERY (square, ink black) ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  min-height: 44px;
  padding: 12px 20px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1;
  border-radius: 0;
  border: 1px solid transparent;
  background: transparent;
  color: inherit;
  transition: background var(--t), color var(--t), border-color var(--t);
  white-space: nowrap;
  cursor: pointer;
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn:active:not(:disabled) { transform: scale(0.97); transition-duration: 80ms; }
.btn:focus-visible { outline: 2px solid var(--color-text-main); outline-offset: 3px; }

.btn.primary {
  background: var(--color-text-main);
  color: var(--color-surface);
  border-color: var(--color-text-main);
}
.btn.primary:hover:not(:disabled) { background: var(--color-hover); border-color: var(--color-hover); }

.btn.ghost {
  background: transparent;
  color: var(--color-text-main);
  border: 1px solid var(--color-line);
}
.btn.ghost:hover:not(:disabled) {
  background: var(--color-text-main);
  color: var(--color-surface);
  border-color: var(--color-text-main);
}

.btn.lg { min-height: 52px; padding: 14px 28px; font-size: 14px; }
.btn.sm { min-height: 36px; padding: 8px 14px; font-size: 12px; }

.btn .btn-icon, .btn img, .btn svg { width: 16px; height: 16px; flex-shrink: 0; }

/* Icon button — gallery (no bg fill, ink hover) */
.icon-btn {
  position: relative;
  width: 40px; height: 40px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 0;
  transition: color var(--t), transform var(--t);
  color: var(--color-text-main);
}
.icon-btn:hover { color: var(--color-hover); background: transparent; transform: translateY(-1px); }
.icon-btn:active { transform: translateY(0); }
.icon-btn img, .icon-btn svg { width: 20px; height: 20px; filter: none; transition: transform var(--t); }

/* ---------- FORMS ---------- */
label {
  display: block;
  font-size: 13px; font-weight: 500;
  margin-bottom: var(--space-8);
  color: var(--text);
}

/* ===== select / input — gallery underline (왼쪽→오른쪽 골드 라인 그리기) =====
   border-bottom 대신 background-image 멀티 레이어로 라인을 그려
   focus 시 gold 라인이 좌→우로 부드럽게 확장되는 시그니처 인터랙션 */
select, input[type="search"], input[type="text"], input[type="email"], textarea {
  width: 100%;
  min-height: 44px;
  padding: 12px 0 11px;
  background: transparent;
  color: var(--color-text-main);
  font-size: 14px;
  letter-spacing: -0.005em;
  border: 0;
  border-radius: 0;
  outline: none;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  box-shadow: none !important;
  -webkit-box-shadow: none !important;
  /* 라인 그리기 시스템 (input/textarea 용 — 화살표 없음) */
  background-image:
    linear-gradient(var(--color-accent), var(--color-accent)),  /* gold focus line */
    linear-gradient(var(--color-line), var(--color-line));      /* gray base line */
  background-position: bottom left, bottom left;
  background-size: 0 1px, 100% 1px;
  background-repeat: no-repeat, no-repeat;
  transition: background-size 480ms cubic-bezier(0.65, 0, 0.35, 1), color var(--t), letter-spacing 320ms var(--ease);
}

select {
  appearance: none; -webkit-appearance: none;
  cursor: pointer;
  padding-right: 28px;
  /* select은 배경에 라인 2개 + ▾ 화살표 한 장, 총 3개 background 레이어 */
  background-image:
    linear-gradient(var(--color-accent), var(--color-accent)),
    linear-gradient(var(--color-line), var(--color-line)),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath stroke='%23111' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round' d='M1.5 1.5 6 6l4.5-4.5'/%3E%3C/svg%3E");
  background-position:
    bottom left,
    bottom left,
    right 4px center;
  background-size:
    0 1px,        /* gold line 시작 0% → focus 시 100% */
    100% 1px,     /* gray base 항상 100% */
    12px 8px;     /* arrow */
  background-repeat: no-repeat, no-repeat, no-repeat;
  transition:
    background-size 480ms cubic-bezier(0.65, 0, 0.35, 1),
    color var(--t),
    letter-spacing 320ms var(--ease);
}

/* HOVER — gray base line이 짙어짐 (행동 가능 신호) */
select:hover, input:hover, textarea:hover {
  background-image:
    linear-gradient(var(--color-accent), var(--color-accent)),
    linear-gradient(var(--color-text-main), var(--color-text-main));
}
select:hover {
  background-image:
    linear-gradient(var(--color-accent), var(--color-accent)),
    linear-gradient(var(--color-text-main), var(--color-text-main)),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath stroke='%23111' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round' d='M1.5 1.5 6 6l4.5-4.5'/%3E%3C/svg%3E");
}

/* ===== select/input 포커스 — 외곽선 완전 제거 (Chromium native border 차단) ===== */
/* Chromium은 select 클릭/오픈 시 1px solid black 박스를 native하게 그림.
   outline 제거만으로는 안 잡혀서 border / box-shadow / outline 모두 강제 무력화 */
select:focus,
select:focus-visible,
select:active,
input:focus,
input:focus-visible,
textarea:focus,
textarea:focus-visible {
  outline: 0 !important;
  outline-offset: 0 !important;
  border-top: 0 !important;
  border-right: 0 !important;
  border-left: 0 !important;
  border-bottom: 1px solid var(--color-text-main) !important;
  box-shadow: none !important;
  -webkit-box-shadow: none !important;
  color: var(--color-text-main);
}

/* 포커스 시 ▾ 화살표만 accent 골드 — 절제된 포인트 (외곽선 대체 시각 신호) */
select:focus,
select:focus-visible,
select:active {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath stroke='%23BFA37A' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round' d='M1.5 1.5 6 6l4.5-4.5'/%3E%3C/svg%3E") !important;
}

/* Firefox dotted focus ring 제거 (텍스트 색을 투명 + text-shadow 트릭) */
select:-moz-focusring {
  color: transparent;
  text-shadow: 0 0 0 var(--color-text-main);
}
/* Firefox select 추가 inner border 제거 */
select::-moz-focus-inner { border: 0 !important; padding: 0 !important; }

/* Chrome 자동 채움 시 노란 배경/그림자 차단 */
select:-webkit-autofill,
input:-webkit-autofill,
textarea:-webkit-autofill {
  -webkit-box-shadow: 0 0 0 30px var(--color-bg) inset !important;
  -webkit-text-fill-color: var(--color-text-main) !important;
}

/* ---------- HEADER — gallery (얇은 hairline · 절제된 nav · ink hover) ---------- */
.header {
  position: sticky; top: 0;
  z-index: var(--z-header);
  background: rgba(248, 248, 246, 0.94);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-line);
}
.header-inner {
  display: flex; align-items: center;
  gap: var(--space-24);
  min-height: var(--header-height);
}

.logo { line-height: 1; flex-shrink: 0; }
.logo a {
  display: inline-block;
  padding: 8px 0;
  font-family: "Noto Serif KR", Georgia, serif;
  font-size: 20px; font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--color-text-main);
  transition: letter-spacing 320ms var(--ease), color var(--t);
}
.logo a:hover { color: var(--color-text-main); letter-spacing: 0.22em; }

.nav { flex: 1; min-width: 0; }
.nav ul { display: flex; flex-wrap: wrap; gap: 6px var(--space-32); justify-content: center; align-items: center; }
.nav a {
  position: relative;
  display: block;
  padding: 8px 0;
  font-size: 11px; font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--color-text-sub);
  white-space: nowrap;
  text-transform: uppercase;
  transition: color var(--t);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: 4px;
  height: 1px;
  background: var(--color-text-main);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 280ms var(--ease);
}
.nav a:hover { color: var(--color-text-main); }
.nav a:hover::after,
.nav a:focus-visible::after { transform: scaleX(1); }

.header-search { width: 200px; flex-shrink: 0; }
.header-search-form { position: relative; }
.header-search-input {
  min-height: 36px;
  padding: 8px 32px 8px 0;
  font-size: 12px;
  border: 0;
  border-bottom: 1px solid var(--color-line);
  border-radius: 0;
  background: transparent;
  letter-spacing: 0.04em;
}
.header-search-input::placeholder { color: var(--color-text-muted); }
.header-search-input:focus { border-bottom-color: var(--color-text-main); }
.header-search-submit {
  position: absolute; top: 50%; right: 0;
  transform: translateY(-50%);
  width: 28px; height: 28px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 0;
  background: transparent;
  color: var(--color-text-main);
}
.header-search-submit svg, .header-search-submit img { width: 16px; height: 16px; }

.header-icons { display: flex; align-items: center; gap: var(--space-8); flex-shrink: 0; }

.cart { position: relative; }
.cart-count {
  position: absolute; top: 0; right: 0;
  min-width: 16px; height: 16px;
  padding: 0 4px;
  background: var(--color-text-main); color: var(--color-surface);
  font-size: 9px; font-weight: 600;
  border-radius: var(--radius-pill);
  display: inline-flex; align-items: center; justify-content: center;
  line-height: 1;
  letter-spacing: 0;
}

.menu-toggle { display: none; }

/* Theme toggle — sun/moon swap by data-theme */
.theme-toggle { position: relative; }
.theme-toggle-icon {
  position: absolute;
  inset: 0; margin: auto;
  width: 20px; height: 20px;
  transition: opacity var(--t), transform var(--t);
}
.theme-toggle-sun { opacity: 1; transform: scale(1) rotate(0); }
.theme-toggle-moon { opacity: 0; transform: scale(0.7) rotate(-30deg); }
:root[data-theme="dark"] .theme-toggle-sun,
.theme-toggle[aria-pressed="true"] .theme-toggle-sun { opacity: 0; transform: scale(0.7) rotate(30deg); }
:root[data-theme="dark"] .theme-toggle-moon,
.theme-toggle[aria-pressed="true"] .theme-toggle-moon { opacity: 1; transform: scale(1) rotate(0); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle-sun { opacity: 0; transform: scale(0.7) rotate(30deg); }
  :root:not([data-theme="light"]) .theme-toggle-moon { opacity: 1; transform: scale(1) rotate(0); }
}

/* Mobile menu */
.mobile-menu {
  border-top: 1px solid var(--color-line);
  background: var(--color-surface);
  max-height: calc(100vh - var(--header-height));
  overflow-y: auto;
}
.mobile-menu nav ul { display: flex; flex-direction: column; }
.mobile-menu nav a {
  display: block;
  padding: 16px var(--container-pad-x);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--color-line-soft);
  color: var(--color-text-main);
  transition: background var(--t), color var(--t);
}
.mobile-menu nav a:hover { background: var(--color-floor); }

/* ---------- FOOTER — gallery (floor tone, hairline) ---------- */
.footer {
  padding: 80px 0 40px;
  background: var(--color-floor);
  border-top: 1px solid var(--color-line);
  font-size: 13px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 80px;
  align-items: start;
}
.footer-logo {
  display: block;
  margin-bottom: var(--space-16);
  font-family: "Noto Serif KR", Georgia, serif;
  font-size: 20px; font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--color-text-main);
  transition: letter-spacing 320ms var(--ease);
}
.footer-logo:hover { letter-spacing: 0.22em; }
.footer-text { color: var(--color-text-sub); margin-bottom: var(--space-12); max-width: 420px; line-height: 1.7; }
.footer-copyright { color: var(--color-text-muted); font-size: 12px; letter-spacing: 0.04em; }

.footer-links { display: flex; gap: 80px; justify-content: flex-end; }
.footer-group-title {
  margin-bottom: var(--space-16);
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--color-text-main);
  text-transform: uppercase;
  transition: color var(--t);
}
.footer-group:hover .footer-group-title { color: var(--color-accent); }
.footer-group ul { display: flex; flex-direction: column; gap: 12px; }
.footer-group a {
  position: relative;
  display: inline-block;
  color: var(--color-text-sub);
  font-size: 13px;
  padding: 2px 0;
  transition: color var(--t);
}
.footer-group a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 280ms var(--ease);
}
.footer-group a:hover,
.footer-group a:focus-visible { color: var(--color-text-main); }
.footer-group a:hover::after,
.footer-group a:focus-visible::after { transform: scaleX(1); }

.footer-legal-strip {
  grid-column: 1 / -1;
  margin-top: var(--space-56);
  padding-top: var(--space-24);
  border-top: 1px solid var(--color-line);
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-16);
}
.footer-legal-strip p { font-size: 12px; color: var(--color-text-muted); line-height: 1.6; }
.footer-legal-strip a { color: var(--color-text-main); text-decoration: underline; text-decoration-color: var(--color-line); text-underline-offset: 3px; }
.footer-legal-strip a:hover { text-decoration-color: var(--color-text-main); }

/* ---------- BACK TO TOP — gallery (square ink) ---------- */
.back-to-top {
  position: fixed; right: 24px; bottom: 100px;
  width: 44px; height: 44px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--color-text-main); color: var(--color-surface);
  border-radius: 0;
  font-size: 10px; font-weight: 500;
  letter-spacing: 0.12em;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  z-index: 900;
  transition: background var(--t), bottom var(--t);
  animation: backToTopFadeIn 200ms ease;
}
.back-to-top[hidden] { display: none !important; }
.back-to-top:hover {
  background: var(--color-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
}
.back-to-top:active { transform: translateY(0); }
body.compare-bar-open .back-to-top { bottom: 132px; }
@keyframes backToTopFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
  .back-to-top { animation: none; }
}

/* =========================================================
   DARK MODE — gallery night
   - prefers-color-scheme 자동 감지
   - data-theme="dark"/"light"로 명시 override
   ========================================================= */
:root[data-theme="dark"] {
  color-scheme: dark;
  accent-color: #F2F0EC;
  caret-color: #F2F0EC;
  --color-bg: #0E0F11;
  --color-surface: #16181B;
  --color-floor: #1A1D21;
  --color-text-main: #F2F0EC;
  --color-text-sub: #9DA0A6;
  --color-text-muted: #5C5F66;
  --color-line: #2A2E34;
  --color-line-soft: #1F2227;
  --color-accent: #C9AC82;
  --color-accent-soft: #2A2520;
  --color-hover: #FFFFFF;
  --color-focus: #C9AC82;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    accent-color: #F2F0EC;
    caret-color: #F2F0EC;
    --color-bg: #0E0F11;
    --color-surface: #16181B;
    --color-floor: #1A1D21;
    --color-text-main: #F2F0EC;
    --color-text-sub: #9DA0A6;
    --color-text-muted: #5C5F66;
    --color-line: #2A2E34;
    --color-line-soft: #1F2227;
    --color-accent: #C9AC82;
    --color-accent-soft: #2A2520;
    --color-hover: #FFFFFF;
    --color-focus: #C9AC82;
  }
}

/* 다크 모드에서 hero 그라데이션 톤 보정 (어두운 배경에 더 짙게) */
:root[data-theme="dark"] .hero-bg::after,
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .hero-bg::after {
    background: linear-gradient(105deg, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.4) 45%, rgba(0,0,0,0.15) 100%);
  }
}

/* 액자 매트도 다크 모드에선 surface 톤 (검은 액자 효과) */
:root[data-theme="dark"] .emotion-card > img,
:root[data-theme="dark"] .space-card > img,
:root[data-theme="dark"] .curator-card > img,
:root[data-theme="dark"] .gift-card > img,
:root[data-theme="dark"] .guide-card > img,
:root[data-theme="dark"] .journal-card > img,
:root[data-theme="dark"] .review-card > img,
:root[data-theme="dark"] .artist-card > img,
:root[data-theme="dark"] .related-card > img,
:root[data-theme="dark"] .product-card .thumb {
  border-color: var(--color-surface);
  background: var(--color-surface);
}