:root {
  --bg: #faf8f5;
  --card: #ffffff;
  --ink: #2b2420;
  --muted: #8a8079;
  --line: #e7e1d9;
  --accent: #a0562f;
  --accent-soft: #f3e6dd;
  --radius: 10px;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.5 Pretendard, -apple-system, 'Malgun Gothic', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
button, input { font: inherit; color: inherit; }
button { cursor: pointer; }
[hidden] { display: none !important; }

/* 상단 */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 24px;
  padding: 0 24px; height: 60px;
  background: rgba(250, 248, 245, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 800; letter-spacing: 0.08em; color: var(--accent); text-decoration: none; font-size: 18px; }
.tabs { display: flex; gap: 4px; margin-right: auto; }
.tab {
  border: 0; background: none; padding: 18px 14px; font-weight: 600; color: var(--muted);
  border-bottom: 2px solid transparent;
}
.tab.is-active { color: var(--ink); border-color: var(--ink); }

/* 공통 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 16px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--card); font-weight: 600; text-decoration: none; color: var(--ink);
}
.btn:hover { border-color: var(--ink); }
.btn-primary { background: var(--ink); color: #fff; border-color: var(--ink); }
.btn-primary:hover { background: var(--accent); border-color: var(--accent); }
.btn-ghost { background: none; }
.btn-link { border: 0; background: none; padding: 4px 6px; color: var(--muted); font-weight: 500; text-decoration: underline; text-underline-offset: 3px; }
.btn-link.danger:hover { color: #b3261e; }
.muted { color: var(--muted); }
.note { color: var(--muted); font-size: 12.5px; margin: 10px 0 0; }
.empty { color: var(--muted); text-align: center; margin: 0; padding: 80px 16px; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  border: 1px solid var(--line); background: var(--card); border-radius: 999px;
  padding: 5px 12px; font-size: 13.5px; white-space: nowrap;
}
.chip:hover { border-color: var(--ink); }
.chip.is-on { background: var(--ink); color: #fff; border-color: var(--ink); }

.seg { display: inline-flex; background: #efebe5; border-radius: 8px; padding: 3px; gap: 2px; }
.seg button { border: 0; background: none; padding: 6px 12px; border-radius: 6px; font-size: 13.5px; color: var(--muted); font-weight: 600; }
.seg button.is-on { background: var(--card); color: var(--ink); box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08); }
.seg button:disabled { opacity: 0.4; cursor: not-allowed; }
.seg-sm button { padding: 4px 10px; font-size: 12.5px; }

.tag {
  display: inline-block; font-size: 10.5px; font-weight: 800; letter-spacing: 0.04em;
  padding: 2px 6px; border-radius: 4px; background: var(--ink); color: #fff; vertical-align: middle;
}
.tag-new { background: #2f6f4f; }
.tag-sale { background: #b3261e; }
.tag-best { background: var(--accent); }

/* 시뮬레이터 */
.panel { max-width: 1320px; margin: 0 auto; padding: 20px 24px 60px; }
.sim-stage { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 16px; align-items: start; }
.stage-view, .stage-info, .card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
}
.stage-head, .stage-foot { display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between; align-items: center; padding: 12px 14px; }
.stage-foot { border-top: 1px solid var(--line); justify-content: flex-start; gap: 24px; }
.stage-foot label { display: flex; align-items: center; gap: 10px; font-size: 13.5px; color: var(--muted); font-weight: 600; }
.canvas-wrap { position: relative; background: #ece8e2; aspect-ratio: 3 / 2; }
.canvas-wrap.is-square { aspect-ratio: 1; }
.canvas-wrap canvas, .canvas-wrap img { display: block; width: 100%; height: 100%; object-fit: cover; }
.canvas-wrap .empty { position: absolute; inset: 0; display: grid; place-items: center; padding: 0; }

.swatches { display: inline-flex; gap: 6px; }
.swatches button {
  width: 24px; height: 24px; border-radius: 50%; border: 2px solid #fff; background: var(--c);
  box-shadow: 0 0 0 1px var(--line);
}
.swatches button.is-on { box-shadow: 0 0 0 2px var(--ink); }

.stage-info { display: flex; flex-direction: column; }
#swatchCanvas { width: 100%; aspect-ratio: 1; display: block; background: #ece8e2; }
.product-info { padding: 16px 18px 18px; }
.product-info h2 { font-size: 18px; margin: 0 0 12px; line-height: 1.35; }
.product-info dl { display: grid; grid-template-columns: 64px 1fr; gap: 6px 10px; margin: 0 0 16px; font-size: 14px; }
.product-info dt { color: var(--muted); }
.product-info dd { margin: 0; font-weight: 600; }
.info-actions { display: flex; flex-wrap: wrap; gap: 8px; }

.catalog { margin-top: 20px; }
.filters { display: flex; flex-direction: column; gap: 10px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.filter-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; }
.filter-label { font-size: 12.5px; color: var(--muted); font-weight: 700; }
#search {
  border: 1px solid var(--line); border-radius: 8px; padding: 7px 12px; min-width: 220px; background: var(--card);
}
.count { margin-left: auto; font-size: 13.5px; color: var(--muted); }

.grid { list-style: none; padding: 0; margin: 16px 0 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(124px, 1fr)); gap: 14px; }
.grid-empty { grid-column: 1 / -1; color: var(--muted); text-align: center; padding: 40px; }
.item {
  position: relative; display: flex; flex-direction: column; gap: 2px; width: 100%;
  border: 0; background: none; padding: 0; text-align: left;
}
.item canvas {
  width: 100%; aspect-ratio: 1; border-radius: 8px; display: block; margin-bottom: 6px;
  outline: 1px solid var(--line); outline-offset: -1px; transition: transform 0.15s;
}
.item:hover canvas { transform: translateY(-2px); }
.item.is-on canvas { outline: 3px solid var(--ink); outline-offset: -3px; }
.item .tag { position: absolute; top: 6px; left: 6px; }
.item-name { font-size: 13px; font-weight: 600; line-height: 1.3; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.item-size { font-size: 12px; color: var(--muted); }

/* 계산기 */
#calc:not([hidden]) { display: grid; grid-template-columns: minmax(0, 420px) minmax(0, 1fr); gap: 16px; align-items: start; }
.calc-form { display: flex; flex-direction: column; gap: 16px; }
.card { padding: 18px; }
.card h2 { font-size: 16px; margin: 0 0 14px; display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.card h2 small { color: var(--muted); font-weight: 500; }
.card h2 .btn-link { margin-left: auto; }
.card h3 { font-size: 14px; margin: 18px 0 8px; }
.card label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); font-weight: 600; }
.card input[type=number], .card input[type=text] {
  border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; background: #fff; color: var(--ink); width: 100%; min-width: 0;
}
.card input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
.inline { display: flex; align-items: center; gap: 8px; margin: 12px 0; color: var(--muted); }
.inline input { width: 100px !important; }
.inline-label { flex-direction: row !important; align-items: center; margin-left: auto; }
.inline-label input { width: 56px !important; padding: 4px 8px !important; }
.grid2, .grid3 { display: grid; gap: 10px; margin-top: 10px; }
.grid2 { grid-template-columns: 1fr 1fr; }
.grid3 { grid-template-columns: repeat(3, 1fr); }
.checks { display: flex; gap: 14px; align-items: flex-end; padding-bottom: 8px; }
.checks label { flex-direction: row; align-items: center; gap: 6px; color: var(--ink); }
.from-product { font-size: 12.5px; color: var(--accent); font-weight: 600; align-self: center; }

.result {
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 16px 0;
  padding: 14px; background: var(--accent-soft); border-radius: 8px;
}
.result div { display: flex; flex-direction: column; color: var(--accent); font-weight: 600; font-size: 13px; }
.result strong { font-size: 28px; color: var(--ink); line-height: 1.2; font-variant-numeric: tabular-nums; }
.card > .btn-primary { width: 100%; }
.badge-count { background: var(--ink); color: #fff; font-size: 12px; border-radius: 999px; padding: 1px 8px; }

.saved { list-style: none; margin: 0 0 12px; padding: 0; }
.saved li { display: grid; grid-template-columns: 1fr auto auto auto; gap: 4px 8px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.saved li.muted { display: block; border: 0; }
.saved small { display: block; color: var(--muted); }

.calc-preview { position: sticky; top: 76px; }
#netCanvas { width: 100%; max-width: 560px; aspect-ratio: 1; display: block; margin: 0 auto; }
.faces { width: 100%; border-collapse: collapse; font-size: 13.5px; font-variant-numeric: tabular-nums; }
.faces th { text-align: left; color: var(--muted); font-weight: 600; padding: 6px 4px; border-bottom: 1px solid var(--line); }
.faces td { padding: 7px 4px; border-bottom: 1px solid var(--line); }
.faces td:last-child, .faces th:last-child { text-align: right; }
.faces .sum td { font-weight: 700; border-bottom: 0; }

/* 제품 관리 */
dialog { border: 0; border-radius: 14px; padding: 0; max-width: 520px; width: calc(100% - 32px); }
dialog::backdrop { background: rgba(30, 24, 20, 0.45); }
.admin { padding: 24px; }
.admin h2 { margin: 0 0 8px; }
.admin p { font-size: 14px; }
.drop { display: block; border: 2px dashed var(--line); border-radius: 10px; padding: 22px; text-align: center; color: var(--muted); cursor: pointer; }
.drop input { display: block; margin: 0 auto 8px; }
.admin-actions { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; margin-top: 16px; }

@media (max-width: 900px) {
  .sim-stage, #calc:not([hidden]) { grid-template-columns: 1fr; }
  .stage-info { flex-direction: row; }
  #swatchCanvas { width: 40%; }
  .calc-preview { position: static; }
}
@media (max-width: 600px) {
  .topbar { padding: 0 16px; gap: 12px; }
  .brand { font-size: 15px; }
  .tab { padding: 18px 8px; font-size: 14px; }
  .panel { padding: 16px 16px 48px; }
  .stage-info { flex-direction: column; }
  #swatchCanvas { width: 100%; aspect-ratio: 2 / 1; }
  .grid { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  #search { min-width: 0; width: 100%; }
  .grid3 { grid-template-columns: 1fr 1fr 1fr; }
  .count { margin-left: 0; }
}