:root {
  --bg: #f4efe6;
  --panel: rgba(255, 251, 246, 0.92);
  --panel-strong: #fff8ef;
  --line: #d8c9b6;
  --ink: #2f2417;
  --muted: #7a6a57;
  --accent: #bc2f24;
  --accent-deep: #8f1f18;
  --accent-soft: #f6ddd7;
  --shadow: 0 18px 40px rgba(74, 45, 18, 0.12);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; font-family: "Microsoft YaHei UI", "PingFang SC", sans-serif; color: var(--ink); background:
  radial-gradient(circle at top left, rgba(255,255,255,0.55), transparent 28%),
  linear-gradient(135deg, #f8f1e7 0%, #efe3d1 48%, #ead9c1 100%);
  min-height: 100%;
}
a { color: var(--accent-deep); text-decoration: none; }
button, input, select {
  font: inherit;
}
button, .primary, .home-action {
  cursor: pointer;
  border: 0;
  border-radius: 8px;
  transition: transform .16s ease, box-shadow .16s ease, background .16s ease;
}
button:hover, .primary:hover, .home-action:hover { transform: translateY(-1px); }
button {
  background: #efe5d8;
  color: var(--ink);
  padding: 11px 16px;
}
.primary {
  background: linear-gradient(135deg, var(--accent) 0%, #d24d33 100%);
  color: #fff;
  box-shadow: 0 12px 28px rgba(188, 47, 36, 0.22);
}
input, select {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.82);
  border-radius: 8px;
  padding: 11px 12px;
  min-height: 44px;
}
label {
  display: grid;
  gap: 7px;
  font-size: 14px;
  color: var(--muted);
}
h1, h2 { margin: 0; }
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 28px;
  background: rgba(255, 248, 239, 0.92);
  border-bottom: 1px solid rgba(128, 97, 67, 0.16);
  backdrop-filter: blur(10px);
}
.topbar.sticky {
  position: sticky;
  top: 0;
  z-index: 20;
}
.brand {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0;
}
.topbar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.page {
  padding: 22px;
  display: grid;
  gap: 18px;
}
.panel {
  background: var(--panel);
  border: 1px solid rgba(128, 97, 67, 0.16);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 18px;
}
.is-hidden {
  display: none !important;
}
.subpanel {
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  background: var(--panel-strong);
}
.subhead {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.grid {
  display: grid;
  gap: 14px;
}
.header-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.query-grid {
  grid-template-columns: 2fr 1fr 1fr auto;
  align-items: end;
}
.item-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.editor-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(300px, 0.95fr);
  gap: 18px;
  align-items: start;
}
.editor-main,
.editor-side {
  display: grid;
  gap: 14px;
}
.wide {
  grid-column: span 2;
}
.size-panel {
  border: 2px solid rgba(188, 47, 36, 0.24);
  border-radius: 12px;
  background: linear-gradient(180deg, #fff8f3 0%, #fff3eb 100%);
  padding: 16px;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.65);
}
.size-title {
  color: var(--accent-deep);
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 12px;
}
.size-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.size-field span {
  color: var(--accent-deep);
  font-size: 15px;
  font-weight: 800;
}
.size-field input {
  min-height: 54px;
  font-size: 24px;
  font-weight: 800;
  color: var(--accent-deep);
  border: 2px solid rgba(188, 47, 36, 0.24);
  background: rgba(255,255,255,0.96);
}
.calc {
  grid-column: 1 / -1;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-weight: 700;
}
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
}
.data-table th, .data-table td {
  border-bottom: 1px solid rgba(128, 97, 67, 0.16);
  padding: 12px 10px;
  font-size: 14px;
  text-align: center;
  vertical-align: middle;
}
.data-table th {
  background: #fbf2e8;
  color: var(--ink);
  position: sticky;
  top: 0;
}
.compact th, .compact td {
  padding: 8px 8px;
}
.compact input {
  min-height: 38px;
  padding: 8px 10px;
}
.actions {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}
.total {
  margin-top: 12px;
  text-align: right;
  font-size: 18px;
  font-weight: 800;
  color: var(--accent-deep);
}
.selected {
  background: rgba(188, 47, 36, 0.08);
}
.home {
  min-height: calc(100vh - 90px);
  display: grid;
  place-content: center;
  gap: 18px;
  padding: 24px;
}
.home-action {
  display: block;
  min-width: 260px;
  padding: 28px 20px;
  text-align: center;
  background: var(--panel);
  color: var(--ink);
  border: 1px solid rgba(128, 97, 67, 0.16);
  box-shadow: var(--shadow);
  font-size: 22px;
  font-weight: 800;
}
.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.login-panel {
  width: min(440px, 100%);
  background: var(--panel);
  border: 1px solid rgba(128, 97, 67, 0.16);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 28px;
}
.stack {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}
.error {
  min-height: 20px;
  color: var(--accent-deep);
}
@media (max-width: 900px) {
  .header-grid, .item-grid, .query-grid, .size-grid { grid-template-columns: 1fr 1fr; }
  .editor-layout { grid-template-columns: 1fr; }
  .wide { grid-column: span 2; }
}
@media (max-width: 640px) {
  .topbar { padding: 16px; align-items: flex-start; flex-direction: column; }
  .header-grid, .item-grid, .query-grid, .size-grid { grid-template-columns: 1fr; }
  .wide { grid-column: span 1; }
  .page { padding: 14px; }
  .panel { padding: 14px; }
  .button-row, .actions { justify-content: stretch; }
}
.editor h2 {
  margin-bottom: 14px;
  font-size: 24px;
}
.direction-preview {
  display: grid;
  place-items: center;
  min-height: 250px;
  background: linear-gradient(180deg, #fffdfa 0%, #fff4ee 100%);
  border: 1px solid rgba(188, 47, 36, 0.16);
  border-radius: 12px;
  padding: 10px;
}
.direction-preview svg {
  width: 100%;
  max-width: 380px;
  height: auto;
  display: block;
}