/* =========================================================
   黑白极简 · 商品店铺样式
   供 静态首页(index.html) 与 管理后台(/admin) 共用
   ========================================================= */

:root {
  --ink: #000000;
  --paper: #ffffff;
  --gray: #666666;
  --light: #efefef;
  --line: #c8c8c8;
}
/* 暗色默认(会被 index.html 内联的 data-theme=dark 覆盖) */
[data-theme="dark"] {
  --ink: #ffffff;
  --paper: #101010;
  --gray: #9a9a9a;
  --light: #1c1c1c;
  --line: #3a3a3a;
}
html { color-scheme: light; }
html[data-theme="dark"] { color-scheme: dark; }

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", Helvetica, Arial, sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

.hidden { display: none !important; }

.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */
.site-header { border-bottom: 1px solid var(--ink); background: var(--paper); }
.header-inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 18px;
  padding-bottom: 18px;
}
.logo { font-size: 24px; font-weight: 800; letter-spacing: 1px; text-decoration: none; color: var(--ink); }
.logo-dot { color: var(--gray); }
.tagline {
  text-align: center;
  font-size: 12px; letter-spacing: 2px;
  color: var(--gray); text-transform: uppercase;
  padding-bottom: 14px;
}
.theme-toggle {
  border: 1px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  font-size: 18px; line-height: 1;
  width: 36px; height: 36px;
  cursor: pointer;
  transition: background .15s ease, color .15s ease;
}
.theme-toggle:hover { background: var(--ink); color: var(--paper); }

/* ---------- Hero ---------- */
.hero { padding: 56px 0 40px; text-align: center; border-bottom: 1px solid var(--ink); }
.hero h1 {
  font-size: clamp(28px, 5vw, 46px);
  font-weight: 900;
  letter-spacing: 6px;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.hero-sub { max-width: 640px; margin: 0 auto 16px; font-size: 15px; color: var(--gray); }
.hero-note {
  font-size: 11px; letter-spacing: 3px; color: var(--paper);
  background: var(--ink); display: inline-block; padding: 6px 14px;
  text-transform: uppercase;
}
.hero .btn-ghost { margin-top: 16px; }

/* ---------- Grid ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 24px; padding: 48px 0; }
.card {
  background: var(--paper);
  border: 1px solid var(--ink);
  padding: 18px;
  display: flex; flex-direction: column; cursor: pointer;
  text-align: left; font-family: inherit; color: inherit; font-size: 100%;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.card:hover, .card:focus-visible {
  transform: translate(-3px, -3px);
  box-shadow: 6px 6px 0 var(--ink);
  background: var(--light);
  outline: none;
}
.card-thumb {
  position: relative;
  width: 100%; aspect-ratio: 4 / 3;
  border: 1px solid var(--ink);
  display: flex; align-items: flex-end; justify-content: center;
  overflow: hidden; margin-bottom: 14px; background: var(--paper);
}
.card-thumb img { width: 100%; height: 100%; object-fit: contain; }
.card-thumb .ph { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; font-size: 64px; color: var(--ink); }
.thumb-count {
  position: absolute; right: 6px; top: 6px;
  background: var(--ink); color: var(--paper);
  font-size: 11px; font-weight: 800; letter-spacing: 1px;
  padding: 2px 7px; line-height: 1.4;
}
.card-name { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
.card-price { font-size: 15px; font-weight: 800; }

/* ---------- Empty ---------- */
.empty { text-align: center; padding: 60px 0; color: var(--gray); }
.empty a { color: var(--ink); font-weight: 700; }

/* ---------- 空状态 ---------- */
.empty-state {
  text-align: center;
  padding: 90px 24px;
  border: 1px dashed var(--ink);
  margin: 48px 0 24px;
  background: var(--paper);
}
.empty-mark {
  display: inline-block;
  font-size: 13px; letter-spacing: 4px;
  color: var(--paper); background: var(--ink);
  padding: 6px 16px; margin-bottom: 22px;
}
.empty-state h2 { font-size: 28px; font-weight: 900; letter-spacing: 2px; margin-bottom: 12px; }
.empty-state p { font-size: 15px; color: var(--gray); }
.empty-hint { margin-top: 18px; font-size: 12px; letter-spacing: 1px; color: var(--gray); }

/* ---------- Modal ---------- */
.modal { position: fixed; inset: 0; z-index: 100; display: flex; align-items: center; justify-content: center; padding: 20px; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.7); }
.modal-card {
  position: relative; background: var(--paper); border: 1px solid var(--ink);
  width: 100%; max-width: 480px; padding: 28px;
  max-height: calc(100vh - 40px); overflow-y: auto;
  box-shadow: 10px 10px 0 var(--ink);
  animation: pop .18s ease;
}
@keyframes pop { from { transform: translateY(8px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.modal-close { position: absolute; top: 10px; right: 14px; font-size: 26px; line-height: 1; border: none; background: none; cursor: pointer; color: var(--ink); }
.modal-close:hover { font-weight: 900; }
.modal-thumb {
  width: 100%; aspect-ratio: 4 / 3; border: 1px solid var(--ink);
  display: flex; align-items: center; justify-content: center; font-size: 88px;
  background: var(--paper); margin-bottom: 16px; overflow: hidden;
}
.modal-thumb img { width: 100%; height: 100%; object-fit: contain; }
.modal-thumb span { line-height: 1; }
.modal-gallery { position: relative; }
.gal-arrow {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 40px; height: 56px; border: none; cursor: pointer;
  background: rgba(0,0,0,.55); color: #fff;
  font-size: 28px; line-height: 1; display: flex;
  align-items: center; justify-content: center;
}
.gal-arrow:hover { background: rgba(0,0,0,.85); }
.gal-arrow.gal-prev { left: 6px; }
.gal-arrow.gal-next { right: 6px; }
.gal-dots {
  position: absolute; left: 0; right: 0; bottom: 8px;
  display: flex; gap: 6px; justify-content: center; align-items: center;
}
.gal-dot {
  width: 9px; height: 9px; padding: 0; border: 1px solid var(--paper);
  background: transparent; cursor: pointer; border-radius: 50%;
  box-shadow: 0 0 2px rgba(0,0,0,.5);
}
.gal-dot.on { background: var(--paper); }
.modal-card h2 { font-size: 24px; font-weight: 900; margin: 4px 0 2px; }
.modal-price { font-size: 18px; font-weight: 900; margin-bottom: 12px; }
.modal-desc { font-size: 14px; color: var(--gray); margin-bottom: 22px; overflow-wrap: break-word; word-break: break-word; white-space: pre-wrap; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 15px; font-weight: 800; text-decoration: none;
  padding: 14px 20px; border: 1px solid var(--ink); cursor: pointer;
  transition: background .15s ease, color .15s ease;
}
.btn-buy { width: 100%; background: var(--ink); color: var(--paper); }
.btn-buy:hover, .btn-buy:focus-visible { background: var(--paper); color: var(--ink); outline: none; }
.btn-ghost { background: var(--paper); color: var(--ink); margin-top: 12px; }
.btn-ghost:hover { background: var(--ink); color: var(--paper); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--ink); text-align: center; padding: 28px 24px; font-size: 13px; }
.footer-sub { font-size: 11px; color: var(--gray); letter-spacing: 1px; margin-top: 4px; }

/* ---------- Responsive ---------- */
@media (max-width: 560px) {
  .header-inner { flex-direction: column; }
  .grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .card-thumb .ph { font-size: 44px; }
}
@media (max-width: 380px) {
  .grid { grid-template-columns: 1fr; }
}