:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --text: #122033;
  --muted: #6b7a90;
  --line: #dbe5f0;
  --primary: #0f6ab4;
  --danger: #b42318;
  --warn: #b7791f;
  --ok: #1f8a4d;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f7fbff, #edf3fa);
}
.shell {
  max-width: 960px;
  margin: 0 auto;
  padding: 12px;
}
.topbar {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
}
.topbar h1 {
  margin: 0;
  font-size: 20px;
}
.topbar p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
}
.user-box {
  text-align: right;
  display: grid;
  gap: 4px;
}
.muted { color: var(--muted); font-size: 12px; }
.hidden { display: none !important; }
.alert {
  margin-top: 10px;
  border-radius: 10px;
  border: 1px solid transparent;
  padding: 10px;
  font-size: 14px;
}
.alert-ok {
  background: #e4f7ea;
  border-color: #9fd7b2;
  color: #0f6a38;
}
.alert-err {
  background: #fdeae8;
  border-color: #f3c0bb;
  color: #7d1f18;
}
.auth-grid {
  display: grid;
  gap: 12px;
  margin-top: 12px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
}
.card h2, .card h3 {
  margin: 0 0 10px;
}
.grid {
  display: grid;
  gap: 10px;
}
label {
  display: grid;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}
input, select, textarea, button {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 14px;
  padding: 10px;
  background: #fff;
}
textarea { min-height: 80px; }
.btn {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  cursor: pointer;
}
.btn-secondary {
  background: #fff;
  color: var(--primary);
  border-color: #a9cde8;
}
.btn-danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}
.tabs {
  margin-top: 12px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
}
.tab {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 12px;
  background: #fff;
  cursor: pointer;
  white-space: nowrap;
}
.tab.active {
  border-color: #b7d7f2;
  color: var(--primary);
  background: #ebf5ff;
  font-weight: 600;
}
.view-root {
  margin-top: 10px;
  display: grid;
  gap: 10px;
}
.list {
  display: grid;
  gap: 8px;
}
.row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
}
.stack { display: grid; gap: 4px; }
.badge {
  border-radius: 999px;
  padding: 2px 10px;
  border: 1px solid transparent;
  font-size: 12px;
}
.badge-pending { background: #fff7e4; border-color: #f0d99a; color: #896200; }
.badge-confirmed, .badge-packed, .badge-shipped { background: #eaf4ff; border-color: #b7d6f3; color: #0d5d98; }
.badge-completed { background: #e3f8eb; border-color: #aadabf; color: #0f6e3e; }
.badge-cancelled { background: #fdecea; border-color: #f2bbb6; color: #801d15; }
.inline-form {
  display: flex;
  gap: 8px;
  align-items: end;
}
.inline-form > * { flex: 1; }
.code-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  align-items: end;
}
#sendCodeBtn[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}
.qty-row {
  display: grid;
  grid-template-columns: 1fr 100px;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
}
.product-form-actions {
  align-items: center;
}
.product-form-actions .btn {
  width: auto;
  flex: 1;
}
.product-media-grid {
  display: grid;
  gap: 8px;
}
.pm-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #f8fbff;
  padding: 8px;
  display: grid;
  gap: 8px;
}
.pm-default-card {
  border-color: #9fc6e6;
  box-shadow: inset 0 0 0 1px #d2e7f8;
}
.pm-thumb {
  width: 100%;
  height: 140px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid #d7e6f3;
  background: #fff;
}
.pm-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}
.pm-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
}
.pm-actions .btn {
  font-size: 12px;
  padding: 7px 6px;
}
.pm-default-tag {
  font-size: 11px;
  color: var(--ok);
  font-weight: 600;
}
.product-row-top {
  align-items: flex-start;
}
.product-cover-wrap {
  width: 84px;
  flex: 0 0 84px;
}
.product-cover {
  width: 84px;
  height: 84px;
  border-radius: 8px;
  border: 1px solid var(--line);
  object-fit: cover;
  background: #fff;
}
.product-cover-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  background: #f4f7fb;
}
.product-main {
  flex: 1;
  min-width: 0;
}
@media (min-width: 760px) {
  .auth-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
  .code-row { grid-template-columns: 1fr auto; }
}

.lang-switch {
  display: flex;
  gap: 6px;
  align-items: center;
}
.lang-btn {
  width: auto;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
}
.lang-btn.active {
  color: var(--primary);
  border-color: #a9cde8;
  background: #ebf5ff;
  font-weight: 600;
}

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

.home-products-card {
  background: linear-gradient(180deg, #ffffff 0%, #f6fbff 100%);
}

.home-products-card #guestProductList {
  margin-top: 8px;
}

@media (min-width: 760px) {
  .home-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .home-products-card {
    grid-column: 1 / span 2;
  }
}
.auth-single-grid {
  grid-template-columns: 1fr;
}

.auth-single-card {
  max-width: 560px;
  width: 100%;
}

@media (min-width: 760px) {
  .home-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(320px, 1fr);
  }

  .home-products-card {
    grid-column: 1;
  }

  .home-member-card {
    grid-column: 2;
    align-self: start;
  }

  .auth-single-grid {
    justify-items: center;
  }
}

/* Production UI polish: mobile-first and desktop-friendly */
body {
  line-height: 1.45;
}

.shell {
  max-width: 1160px;
  padding: 12px;
}

.topbar {
  align-items: center;
  flex-wrap: wrap;
}

#guestProductList {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.product-catalog {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

@media (min-width: 760px) {
  .shell {
    padding: 16px;
  }

  #guestProductList {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .product-catalog {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  #guestProductList {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

.quick-actions {
  margin-top: 10px;
  display: grid;
  gap: 8px;
}

.quick-actions .btn {
  display: block;
  text-align: center;
  text-decoration: none;
}

.btn-link {
  background: #fff;
  color: var(--primary);
  border-color: #a9cde8;
}

.btn-link:hover {
  background: #ebf5ff;
}