:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --border: #e4e6ea;
  --text: #1f2328;
  --muted: #8b9098;
  --accent: #2f6fed;
  --danger: #e5484d;
  --green: #16a34a;
  --blue: #2563eb;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

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

/* ---------- 登录 ---------- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 36px 32px;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, .06);
}
.login-card h1 { margin: 0 0 6px; font-size: 22px; }
.login-card .sub { color: var(--muted); font-size: 14px; margin-bottom: 24px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; margin-bottom: 6px; color: var(--muted); }
.field input {
  width: 100%;
  padding: 11px 12px;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: 8px;
}
.field input:focus { outline: none; border-color: var(--accent); }
.err { color: var(--danger); font-size: 13px; margin-top: 12px; min-height: 18px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 11px 18px;
  font-size: 15px;
  border: none;
  cursor: pointer;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
}
.btn:hover { opacity: .92; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-block { width: 100%; }
.btn-sm { padding: 7px 13px; font-size: 13px; }
.btn-ghost { background: #fff; color: var(--text); border: 1px solid var(--border); }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.topbar .title { font-weight: 700; font-size: 17px; }
.topbar .meta { color: var(--muted); font-size: 13px; }
.topbar .spacer { flex: 1; }

.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  cursor: pointer;
  color: var(--muted);
}
.chip.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ---------- 选片网格 ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 14px;
  padding: 20px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.card.hidden { display: none; }
.card.readonly .opt { pointer-events: none; opacity: .65; }
.card .thumb {
  position: relative;
  aspect-ratio: 4 / 3;
  background: #eef0f3;
  cursor: zoom-in;
  overflow: hidden;
  display: block;
}
.card .thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.card .fn {
  font-size: 12px;
  color: var(--muted);
  padding: 7px 10px 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.card .opts { padding: 8px 10px 12px; display: flex; gap: 6px; flex-wrap: wrap; }

.opt {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 13px;
  cursor: pointer;
  user-select: none;
  background: #fff;
  color: var(--muted);
  transition: background .12s, color .12s;
}
.opt.checked { color: #fff; border-color: transparent; }
.opt.c0.checked { background: var(--green); }
.opt.c1.checked { background: var(--blue); }
.opt.c2.checked { background: #d97706; }
.opt.c3.checked { background: #7c3aed; }
.opt.c4.checked { background: #0d9488; }
.opt.c5.checked { background: #be185d; }

/* ---------- 提交栏 / 提示 ---------- */
.submit-bar {
  position: sticky;
  bottom: 0;
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.banner {
  margin: 16px 20px;
  padding: 14px 16px;
  border-radius: 10px;
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #065f46;
  font-size: 14px;
}

/* ---------- 大图预览 ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .92);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}
.lightbox.hidden { display: none; }
.lightbox img {
  max-width: 92vw;
  max-height: 80vh;
  object-fit: contain;
  box-shadow: 0 10px 50px rgba(0, 0, 0, .5);
  background: #000;
}
.lb-btn {
  position: absolute;
  background: rgba(255, 255, 255, .12);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 28px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  line-height: 1;
}
.lb-btn:hover { background: rgba(255, 255, 255, .25); }
.lb-close { top: 16px; right: 16px; }
.lb-prev { left: 16px; top: 50%; transform: translateY(-50%); }
.lb-next { right: 16px; top: 50%; transform: translateY(-50%); }
.lb-panel { margin-top: 16px; text-align: center; color: #fff; }
.lb-filename { font-size: 13px; opacity: .8; margin-bottom: 12px; }
.lb-cats { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

/* ---------- 后台表格 ---------- */
.tbl { width: 100%; border-collapse: collapse; background: #fff; }
.tbl th, .tbl td { padding: 10px 12px; border-bottom: 1px solid var(--border); text-align: left; font-size: 14px; }
.tbl th { background: #fafbfc; color: var(--muted); font-weight: 600; }

.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12px;
  margin: 1px 3px;
  color: #fff;
}
.badge.b0 { background: var(--green); }
.badge.b1 { background: var(--blue); }
.badge.b2 { background: #d97706; }
.badge.b3 { background: #7c3aed; }
.badge.b4 { background: #0d9488; }
.badge.b5 { background: #be185d; }

.admin-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  padding: 16px 20px 24px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 600px) {
  .grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; padding: 12px; }
  .lb-prev { left: 8px; }
  .lb-next { right: 8px; }
}