:root {
  color-scheme: light;
  font-family: Arial, "Microsoft YaHei", sans-serif;
  --ink: #111111;
  --muted: #6d727c;
  --line: #d7dbe2;
  --paper: #f7f7f4;
  --panel: #ffffff;
  --accent: #f72c32;
  --display: #5330a7;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
}

button,
input,
select {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
}

.workspace {
  padding: 28px;
  min-width: 0;
}

.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(28px, 4vw, 52px);
  line-height: 1.02;
}

h2 {
  font-size: 24px;
}

.status-card {
  min-width: 154px;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 8px;
  padding: 12px 14px;
}

.status-card span,
.metrics span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.status-card strong,
.metrics strong {
  display: block;
  margin-top: 4px;
  font-size: 18px;
}

.preview-wrap {
  position: relative;
  padding: 28px 0 0 28px;
  overflow: auto;
  max-width: 100%;
}

.ruler {
  position: absolute;
  background:
    repeating-linear-gradient(90deg, #aeb4bd 0 1px, transparent 1px 40px),
    #eef0f3;
  border: 1px solid var(--line);
}

.ruler-x {
  left: 28px;
  right: auto;
  top: 0;
  width: var(--stage-view-w, 1180px);
  height: 20px;
}

.ruler-y {
  top: 28px;
  bottom: auto;
  left: 0;
  width: 20px;
  height: var(--stage-view-h, 630px);
  background:
    repeating-linear-gradient(180deg, #aeb4bd 0 1px, transparent 1px 40px),
    #eef0f3;
}

.package-stage {
  position: relative;
  width: var(--stage-view-w, 1772px);
  height: var(--stage-view-h, 945px);
  max-width: none;
  overflow: hidden;
  background: #fff;
  border: 1px solid #bec4cd;
  box-shadow: 0 20px 44px rgba(16, 24, 40, 0.14);
}

.brand-zone,
.display-block,
.wordmark,
.red-logo,
.guide {
  position: absolute;
  pointer-events: none;
}

.brand-zone {
  inset: 0 0 auto 0;
  height: var(--brand-zone-h);
  background: #fff;
}

.display-block {
  left: var(--display-inset);
  right: var(--display-inset);
  top: var(--display-top);
  bottom: 0;
  background:
    linear-gradient(95deg, rgba(39, 53, 165, 0.96), rgba(98, 34, 143, 0.96)),
    var(--display);
  border-radius: 4px 4px 0 0;
}

.wordmark {
  left: var(--word-x);
  top: var(--word-y);
  height: var(--word-h);
  width: var(--word-w);
  z-index: 6;
}

.red-logo {
  left: var(--logo-x);
  top: var(--logo-y);
  height: var(--logo-h);
  width: var(--logo-w);
  z-index: 7;
}

.guide {
  z-index: 9;
  display: block;
  color: #0c111d;
  font-size: 11px;
  line-height: 1;
}

.guide::before {
  content: "";
  position: absolute;
  display: block;
}

.guide span {
  display: inline-block;
  padding: 4px 6px;
  border: 1px solid rgba(12, 17, 29, 0.25);
  background: rgba(255, 255, 255, 0.86);
  border-radius: 4px;
}

.guide-brand-top {
  left: 0;
  right: 0;
  top: var(--brand-zone-h);
  border-top: 1px dashed #111;
}

.guide-brand-top span {
  transform: translateY(-50%);
  margin-left: 10px;
}

.guide-logo-top {
  left: var(--logo-x);
  top: var(--logo-y);
  width: var(--logo-w);
  border-top: 2px solid var(--accent);
}

.guide-logo-top span {
  transform: translateY(-125%);
}

.guide-display-cut {
  left: 0;
  right: 0;
  top: var(--display-top);
  border-top: 2px dashed #fff;
}

.guide-display-cut span {
  transform: translateY(-50%);
  margin-left: 10px;
  color: #fff;
  background: rgba(12, 17, 29, 0.78);
  border-color: transparent;
}

.guide-gap {
  top: calc(var(--word-y) + var(--word-h) * 0.5);
  left: calc(var(--word-x) + var(--word-w));
  width: var(--logo-gap);
  border-top: 2px solid #1b63ff;
}

.guide-gap span {
  transform: translateY(-125%);
  white-space: nowrap;
}

.metrics {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.metrics article {
  min-width: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 8px;
  padding: 12px;
}

.metrics small {
  display: block;
  color: var(--muted);
  margin-top: 3px;
  font-size: 11px;
  line-height: 1.45;
}

.controls {
  border-left: 1px solid var(--line);
  background: var(--panel);
  padding: 28px 22px;
  overflow: auto;
}

.panel-title {
  margin-bottom: 22px;
}

.control-group {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

.fixed-specs {
  display: grid;
  gap: 8px;
  margin: 4px 0 22px;
}

.fixed-specs h3 {
  margin: 0 0 4px;
  font-size: 14px;
  letter-spacing: 0;
}

.spec-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid #eceff3;
}

.spec-row span {
  color: var(--muted);
  font-size: 12px;
}

.spec-row small {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.35;
}

.spec-row strong {
  color: #151922;
  font-size: 12px;
  white-space: nowrap;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

label {
  color: #252b37;
  font-size: 13px;
  font-weight: 700;
}

.label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

output {
  color: var(--muted);
  font-size: 12px;
}

select,
input[type="number"] {
  width: 100%;
  height: 40px;
  border: 1px solid #c7cdd6;
  border-radius: 6px;
  background: #fff;
  padding: 0 10px;
}

.toggle-list {
  display: grid;
  gap: 10px;
  margin: 20px 0;
}

.toggle-list label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.reset-button {
  width: 100%;
  height: 44px;
  border: 0;
  border-radius: 6px;
  background: #111;
  color: #fff;
  font-weight: 700;
  cursor: pointer;
}

body.hide-guides .guide,
body.hide-display .display-block {
  display: none;
}

@media (max-width: 1060px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .controls {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

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

@media (max-width: 680px) {
  .workspace,
  .controls {
    padding: 18px;
  }

  .topbar {
    align-items: stretch;
    flex-direction: column;
  }

  .preview-wrap {
    padding: 0;
  }

  .ruler {
    display: none;
  }

  .metrics,
  .two-col {
    grid-template-columns: 1fr;
  }
}