:root {
  --bg: #f4f6f8;
  --card: #ffffff;
  --ink: #1d2733;
  --muted: #5f6b78;
  --line: #d8dde4;
  --primary: #0f5dc4;
  --primary-dark: #0a468f;
  --danger: #a42f2f;
  --ok: #1f7a35;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: linear-gradient(180deg, #eef3f8 0%, #f7f9fb 70%);
  color: var(--ink);
  font-family: "Segoe UI", "Noto Sans KR", sans-serif;
}

.shell {
  width: min(1200px, 92vw);
  margin: 28px auto 48px;
  display: grid;
  gap: 18px;
}

.shell-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
}

.eyebrow {
  margin: 0;
  color: #335d8b;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
}

h1 {
  margin: 6px 0 8px;
  font-size: clamp(1.45rem, 3.4vw, 2.2rem);
}

h2 {
  margin: 0 0 10px;
  font-size: 1.2rem;
}

h3 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.muted {
  margin: 0;
  color: var(--muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
  box-shadow: 0 12px 24px rgba(21, 34, 48, 0.08);
}

form {
  display: grid;
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  font-size: 0.92rem;
  color: #2d3945;
  font-weight: 600;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid #c6ced7;
  border-radius: 10px;
  padding: 10px 11px;
  font: inherit;
  color: var(--ink);
  background: #fff;
}

input:focus,
textarea:focus,
select:focus {
  outline: 2px solid #9cc3ff;
  border-color: #5e9bff;
}

textarea {
  resize: vertical;
}

.grid {
  display: grid;
  gap: 10px;
}

.grid.two {
  grid-template-columns: 1fr 1fr;
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  border: 0;
  border-radius: 999px;
  padding: 10px 14px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.92rem;
}

.btn.primary {
  color: #fff;
  background: linear-gradient(180deg, var(--primary), var(--primary-dark));
}

.btn.ghost {
  color: #27425f;
  background: #ecf4ff;
  border: 1px solid #b9d4ff;
}

.btn.danger {
  color: #fff;
  background: linear-gradient(180deg, #be4b4b, var(--danger));
}

.status-line {
  margin: 0;
  min-height: 1.4em;
  font-size: 0.9rem;
}

.status-line.success {
  color: var(--ok);
}

.status-line.error {
  color: #b22e2e;
}

.status-line.info {
  color: #3a4f68;
}

.hidden {
  display: none !important;
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 12px 0;
}

.product-manager {
  display: grid;
  gap: 14px;
}

.product-layout {
  display: grid;
  grid-template-columns: minmax(270px, 0.65fr) minmax(0, 1.35fr);
  gap: 14px;
  align-items: start;
}

.product-list-panel {
  border: 1px solid #d3dbe6;
  border-radius: 14px;
  background: #f9fbfe;
  padding: 12px;
  display: grid;
  gap: 10px;
}

.product-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  max-height: 460px;
  overflow: auto;
}

.product-item-btn {
  border: 1px solid #cdd8e6;
  background: #fff;
  border-radius: 10px;
  width: 100%;
  padding: 10px;
  text-align: left;
  cursor: pointer;
  display: grid;
  gap: 4px;
}

.product-item-btn strong {
  font-size: 0.93rem;
}

.product-item-btn span {
  color: #526071;
  font-size: 0.83rem;
}

.product-item-btn.active {
  border-color: #4f92f1;
  box-shadow: 0 0 0 2px rgba(79, 146, 241, 0.2);
}

.product-editor-panel {
  border: 1px solid #d3dbe6;
  border-radius: 14px;
  background: #fff;
  padding: 12px;
  display: grid;
  gap: 10px;
}

.preview-block {
  align-items: end;
}

.preview-title {
  margin: 0 0 6px;
  color: #3b4f65;
  font-size: 0.86rem;
  font-weight: 700;
}

.thumb-preview {
  width: 100%;
  min-height: 112px;
  border-radius: 10px;
  border: 1px solid #cad5e2;
  overflow: hidden;
  display: grid;
  place-items: center;
  color: #66758a;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  background: #f0f5fb;
}

.thumb-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.thumb-preview.placeholder {
  background:
    repeating-linear-gradient(
      -45deg,
      #d8e5f5,
      #d8e5f5 12px,
      #edf4fd 12px,
      #edf4fd 24px
    );
}

.gallery-preview {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  gap: 8px;
}

.gallery-item {
  position: relative;
  border: 1px solid #cad5e2;
  border-radius: 10px;
  overflow: hidden;
  background: #eff4fb;
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
}

.gallery-item button {
  position: absolute;
  top: 4px;
  right: 4px;
  border: 0;
  border-radius: 999px;
  padding: 2px 7px;
  font-size: 0.74rem;
  background: rgba(163, 47, 47, 0.9);
  color: #fff;
  cursor: pointer;
}

@media (max-width: 1000px) {
  .shell-header {
    flex-direction: column;
  }

  .product-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .grid.two,
  .grid.three {
    grid-template-columns: 1fr;
  }
}