/* ==========================================================================
   留白商品册 —— 视觉基调
   配色严格限制在黑白色系（不引入饱和色），靠明暗层次和圆角/留白营造温和质感。
   刻意避开 Swiss 风格：不用冷白底、不画可见网格线、标题用衬线字体、大量圆角与留白。
   ========================================================================== */

:root {
  --font-serif: "Noto Serif SC", "Songti SC", serif;
  --font-sans: "DM Sans", "PingFang SC", "Microsoft YaHei", sans-serif;

  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 10px;

  --shadow-soft: 0 18px 40px -24px rgba(43, 39, 35, 0.35), 0 2px 8px -2px rgba(43, 39, 35, 0.12);
  --shadow-lift: 0 24px 56px -28px rgba(43, 39, 35, 0.4), 0 4px 12px -4px rgba(43, 39, 35, 0.14);

  --content-max: 1120px;
  --space-section: clamp(48px, 8vw, 96px);
}

/* 浅色主题：暖米白背景 + 暖炭黑文字，卡片用比背景更亮一档的暖白 */
:root,
[data-theme="light"] {
  --color-bg: #f6f2ec;
  --color-bg-elevated: #fffdf9;
  --color-surface: #fbf7f0;
  --color-border: rgba(43, 39, 35, 0.1);
  --color-text: #2b2723;
  --color-text-muted: #6b6459;
  --color-text-faint: #928c80;
  --color-accent: #2b2723;
  --color-accent-contrast: #f6f2ec;
  --color-danger: #7a3b30;
}

/* 深色主题：暖黑背景 + 暖米白文字，卡片用略浅一档的暖灰黑 */
[data-theme="dark"] {
  --color-bg: #201c19;
  --color-bg-elevated: #26221e;
  --color-surface: #2b2723;
  --color-border: rgba(246, 242, 236, 0.12);
  --color-text: #f1ece3;
  --color-text-muted: #b8b0a2;
  --color-text-faint: #8a8276;
  --color-accent: #f1ece3;
  --color-accent-contrast: #201c19;
  --color-danger: #d99c8d;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  transition: background-color 0.25s ease, color 0.25s ease;
}

h1, h2, h3 {
  font-family: var(--font-serif);
  margin: 0 0 0.4em;
  line-height: 1.28;
  letter-spacing: 0.01em;
}

p { margin: 0 0 1em; color: var(--color-text-muted); }

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

/* ---------- 顾客商品页：仅保留商品标题与图片 ---------- */
.public-page {
  background: #ffffff;
  color: #171717;
  font-family: var(--font-sans);
}

.public-catalog {
  width: min(100%, 1280px);
  margin: 0 auto;
  padding: clamp(24px, 5vw, 72px);
}

.public-product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(28px, 4vw, 56px) clamp(18px, 3vw, 36px);
}

.public-product-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.public-product-card img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: #f3f3f3;
}

.public-product-card h2 {
  margin: 0;
  color: #171717;
  font-family: var(--font-sans);
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  font-weight: 500;
  line-height: 1.45;
}

.public-product-detail {
  width: min(100%, 960px);
  margin: 0 auto;
  padding: clamp(32px, 6vw, 80px) clamp(16px, 4vw, 40px);
}

.public-product-detail h1 {
  margin: 0 0 clamp(24px, 4vw, 48px);
  color: #171717;
  font-family: var(--font-sans);
  font-size: clamp(1.45rem, 3vw, 2.25rem);
  font-weight: 500;
  line-height: 1.35;
}

.public-product-gallery {
  display: flex;
  flex-direction: column;
  gap: clamp(16px, 3vw, 32px);
}

.public-product-gallery img {
  width: 100%;
  height: auto;
}

.eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin: 0 0 0.6em;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
  max-width: var(--content-max);
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.05rem;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

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

.theme-toggle,
.admin-link {
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.9rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  transition: background-color 0.2s ease, transform 0.15s ease;
}

.theme-toggle:hover,
.admin-link:hover { transform: translateY(-1px); }

.admin-link {
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  border-color: transparent;
}

/* ---------- 通用按钮 ---------- */
.primary,
.secondary,
.danger,
.text-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: transform 0.15s ease, opacity 0.2s ease;
}

.primary {
  background: var(--color-accent);
  color: var(--color-accent-contrast);
}
.primary:hover { transform: translateY(-1px); opacity: 0.92; }

.secondary {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

.danger {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-danger);
}

.text-button {
  padding: 0 6px;
  background: transparent;
  color: var(--color-text-muted);
  text-decoration: underline;
  text-decoration-color: var(--color-border);
}
.text-button:hover { color: var(--color-text); }

/* ---------- 首页 Hero ---------- */
.hero {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: clamp(24px, 6vw, 64px) 24px 0;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.2rem);
}

.hero-note { display: flex; justify-content: center; }

.note-card {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 28px;
  max-width: 340px;
}
.note-card strong { display: block; margin-bottom: 8px; font-family: var(--font-serif); }

/* ---------- 通用 section ---------- */
.section {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-section) 24px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.section-hint { color: var(--color-text-faint); font-size: 0.9rem; }

/* ---------- 商品网格 ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.product-card {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.product-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

.product-image-wrap { aspect-ratio: 1 / 1; overflow: hidden; }
.product-image { width: 100%; height: 100%; object-fit: cover; }
.product-image-empty,
.admin-product-image-empty { width: 100%; height: 100%; background: var(--color-surface); }

.product-copy { padding: 18px 20px 22px; }
.product-copy h3 { font-size: 1.05rem; margin: 0; }

.empty {
  color: var(--color-text-faint);
  padding: 32px;
  text-align: center;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  grid-column: 1 / -1;
}

/* ---------- 商品详情页 ---------- */
.detail {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}

.back {
  display: inline-block;
  margin-bottom: 20px;
  color: var(--color-text-muted);
}

.gallery {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.gallery-item {
  border: none;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  padding: 0;
  cursor: zoom-in;
  box-shadow: var(--shadow-soft);
}
.gallery-item img { width: 100%; }

.detail-footer { margin-top: 40px; }
.detail-footer h1 { font-size: clamp(1.6rem, 4vw, 2.1rem); }

.share-card {
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 20px;
  margin-top: 20px;
}
.share-qr { width: 88px; height: 88px; border-radius: var(--radius-sm); background: #fff; padding: 6px; }
.share-card strong { display: block; margin-bottom: 4px; }
.share-card p { margin-bottom: 8px; font-size: 0.9rem; }

/* ---------- 灯箱 ---------- */
.lightbox {
  border: none;
  padding: 0;
  background: transparent;
  max-width: 92vw;
  max-height: 92vh;
}
.lightbox::backdrop { background: rgba(20, 18, 16, 0.82); }
.lightbox img { max-width: 92vw; max-height: 88vh; border-radius: var(--radius-sm); }
.lightbox-close {
  position: absolute;
  top: -18px;
  right: -18px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--color-bg-elevated);
  color: var(--color-text);
  font-size: 1.4rem;
  cursor: pointer;
  box-shadow: var(--shadow-soft);
}

/* ---------- 商品二维码管理页 ---------- */
.qr-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.qr-per-page-form {
  display: flex;
  align-items: center;
  gap: 10px;
}
.qr-per-page-form label { color: var(--color-text-muted); font-size: 0.9rem; }
.qr-per-page-form select {
  min-height: 44px;
  padding: 0 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 0.95rem;
}

.qr-print-sheet {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.qr-print-sheet[data-per-page="8"],
.qr-print-sheet[data-per-page="16"],
.qr-print-sheet[data-per-page="32"] {
  grid-template-columns: repeat(4, 1fr);
}

.qr-card {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}
.qr-card-image {
  width: 100%;
  max-width: 220px;
  aspect-ratio: 1 / 1;
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 10px;
}
.qr-card-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.4;
}

.qr-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 32px;
}
.qr-pagination-info { color: var(--color-text-faint); font-size: 0.9rem; }

/* 打印：固定 A4，二维码卡片用黑白墨水友好配色，不随深浅主题变化 */
@media print {
  @page { size: A4; margin: 12mm; }

  .no-print,
  .site-header,
  .site-footer { display: none !important; }

  body { background: #fff !important; color: #000 !important; }

  .qr-page { padding: 0 !important; max-width: none !important; }

  .qr-print-sheet {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 10mm;
  }
  .qr-print-sheet[data-per-page="8"],
  .qr-print-sheet[data-per-page="16"],
  .qr-print-sheet[data-per-page="32"] {
    grid-template-columns: repeat(4, 1fr) !important;
  }

  .qr-card {
    box-shadow: none !important;
    border: 1px solid #ccc;
    break-inside: avoid;
    page-break-inside: avoid;
    background: #fff !important;
  }
  .qr-card-title { color: #000 !important; }
}

/* ---------- 404 ---------- */
.not-found { text-align: center; padding-top: var(--space-section); }

/* ---------- 登录 ---------- */
.auth-section { display: flex; justify-content: center; }
.auth-card {
  width: 100%;
  max-width: 380px;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 36px;
}
.form-error {
  background: rgba(122, 59, 48, 0.1);
  color: var(--color-danger);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.9rem;
}
.form-notice {
  background: var(--color-surface);
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.field { margin-bottom: 18px; }
.field label { display: block; margin-bottom: 6px; font-size: 0.9rem; color: var(--color-text-muted); }
.field input[type="text"],
.field input[type="password"],
.field input:not([type]),
.field input[type="file"] {
  width: 100%;
  min-height: 44px;
  padding: 0 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 0.98rem;
}
.field input[type="file"] { padding: 10px 14px; height: auto; }
.hint { font-size: 0.85rem; color: var(--color-text-faint); margin: 6px 0 0; }
.form-actions { margin-top: 12px; }

/* ---------- 后台仪表盘 ---------- */
.admin { max-width: var(--content-max); margin: 0 auto; padding: 40px 24px 80px; }
.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.admin-list { display: flex; flex-direction: column; gap: 12px; }
.admin-product {
  display: grid;
  grid-template-columns: 64px 1fr auto auto auto;
  align-items: center;
  gap: 16px;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  box-shadow: var(--shadow-soft);
}
.admin-product img,
.admin-product-image-empty {
  width: 64px; height: 64px;
  border-radius: var(--radius-sm);
  object-fit: cover;
}
.admin-product-info { display: flex; flex-direction: column; min-width: 0; }
.admin-product-info span { color: var(--color-text-faint); font-size: 0.85rem; }
.admin-product form { margin: 0; }

/* ---------- 商品编辑页 ---------- */
.editor-layout {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 32px;
  align-items: start;
}
.editor-form,
.admin-qr {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 28px;
}
.admin-qr { text-align: center; }
.admin-qr img { margin: 16px auto; width: 160px; height: 160px; background: #fff; border-radius: var(--radius-sm); padding: 8px; }
.admin-qr p { font-size: 0.85rem; word-break: break-all; }

.image-sort-list {
  list-style: none;
  margin: 12px 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}
.image-sort-item {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 1 / 1;
  cursor: grab;
  border: 1px solid var(--color-border);
}
.image-sort-item img { width: 100%; height: 100%; object-fit: cover; }
.image-sort-item.dragging { opacity: 0.4; }
.image-remove {
  position: absolute;
  top: 4px; right: 4px;
  width: 26px; height: 26px;
  border-radius: 50%;
  border: none;
  background: rgba(20, 18, 16, 0.65);
  color: #fff;
  cursor: pointer;
  line-height: 1;
}

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .hero-note { order: -1; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .editor-layout { grid-template-columns: 1fr; }
  .public-product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 620px) {
  .site-header { padding: 14px 16px; }
  .product-grid { grid-template-columns: 1fr; }
  .admin-product { grid-template-columns: 48px 1fr; }
  .admin-product img, .admin-product-image-empty { width: 48px; height: 48px; }
  .admin-product-info { grid-column: 2; }
  .admin-product form,
  .admin-product a.text-button { grid-column: 2; justify-self: start; }
  .image-sort-list { grid-template-columns: repeat(3, 1fr); }
  .share-card { flex-direction: column; align-items: flex-start; text-align: left; }
  .public-product-grid { grid-template-columns: 1fr; }
}