:root {
  --bg: #e6ecf2;
  --panel: rgba(255, 255, 255, 0.86);
  --panel-border: rgba(32, 53, 81, 0.12);
  --text: #122033;
  --muted: #617189;
  --primary: #0d7a72;
  --primary-soft: rgba(13, 122, 114, 0.15);
  --danger: #c83c32;
  --grid: rgba(64, 93, 128, 0.16);
  --paper: #ffffff;
  --shadow: 0 18px 45px rgba(28, 44, 69, 0.18);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Segoe UI", "PingFang SC", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(13, 122, 114, 0.14), transparent 32%),
    radial-gradient(circle at bottom right, rgba(210, 120, 58, 0.12), transparent 24%),
    linear-gradient(180deg, #eef3f8, #dbe5ef);
}

body {
  min-height: 100vh;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  border: 0;
  border-radius: 12px;
  padding: 10px 14px;
  background: #13304f;
  color: #fff;
  cursor: pointer;
  transition: transform 0.16s ease, opacity 0.16s ease, background 0.16s ease;
}

button:hover {
  transform: translateY(-1px);
}

button.danger {
  background: var(--danger);
}

textarea,
input,
select {
  width: 100%;
  border: 1px solid rgba(48, 67, 91, 0.16);
  border-radius: 12px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
}

.app-shell {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr) 320px;
  min-height: 100vh;
  gap: 18px;
  padding: 18px;
}

.sidebar,
.inspector,
.workspace {
  min-width: 0;
}

.panel {
  backdrop-filter: blur(12px);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  margin-bottom: 18px;
}

.panel h2,
.workspace-header h1 {
  margin: 0 0 14px;
}

.workspace {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.workspace-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  backdrop-filter: blur(12px);
  background: rgba(10, 26, 43, 0.9);
  color: #fff;
  border-radius: var(--radius);
  padding: 22px 24px;
  box-shadow: var(--shadow);
}

.workspace-header p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
}

.workspace-meta {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  font-size: 14px;
}

.workspace-tools {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  flex-wrap: wrap;
}

.zoom-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.zoom-controls button,
.zoom-controls select {
  width: auto;
}

.tool-grid,
.action-stack,
.field-row {
  display: grid;
  gap: 12px;
}

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

.action-stack {
  grid-template-columns: 1fr;
}

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

.field {
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
}

.field span {
  font-size: 13px;
  color: var(--muted);
}

.inline-field {
  display: flex;
  align-items: center;
  gap: 10px;
}

.inline-field input {
  width: auto;
}

.canvas-stage {
  flex: 1;
  overflow: auto;
  border-radius: calc(var(--radius) + 6px);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.24), rgba(255, 255, 255, 0.08)),
    rgba(17, 39, 66, 0.08);
  padding: 40px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.34);
}

.paper-shadow {
  min-height: 100%;
  display: grid;
  place-items: start center;
}

.paper-viewport {
  position: relative;
}

.paper {
  position: absolute;
  left: 0;
  top: 0;
  transform-origin: top left;
  background: var(--paper);
  box-shadow: 0 18px 50px rgba(24, 36, 56, 0.16);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 10mm 10mm;
  background-position: -1px -1px;
  user-select: none;
}

.paper.hide-grid {
  background-image: none;
}

.designer-element {
  position: absolute;
  border: 1px solid transparent;
  overflow: visible;
}

.designer-element.is-selected {
  border-color: var(--primary);
  outline: 2px solid var(--primary-soft);
}

.designer-element[data-type="text"] .element-content,
.designer-element[data-type="image"] .element-content {
  width: 100%;
  height: 100%;
}

.designer-element[data-type="text"] .element-content {
  white-space: pre-wrap;
  word-break: break-word;
}

.designer-element[data-type="rect"] .element-content {
  width: 100%;
  height: 100%;
}

.designer-element[data-type="line"] .element-content {
  width: 100%;
  height: 100%;
  border-top-style: solid;
}

.designer-element[data-type="image"] .element-content {
  display: grid;
  place-items: center;
  border: 1px dashed rgba(18, 32, 51, 0.34);
  background:
    linear-gradient(135deg, rgba(13, 122, 114, 0.08), rgba(210, 120, 58, 0.1));
  color: rgba(18, 32, 51, 0.52);
  font-size: 12px;
}

.resize-handle {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--primary);
  right: -7px;
  bottom: -7px;
  cursor: nwse-resize;
  box-shadow: 0 0 0 2px #fff;
}

.hidden {
  display: none;
}

.empty-state {
  color: var(--muted);
  line-height: 1.6;
}

#templateJson {
  min-height: 180px;
  resize: vertical;
  font-family: Consolas, "Courier New", monospace;
  font-size: 12px;
}

@media (max-width: 1280px) {
  .app-shell {
    grid-template-columns: 280px minmax(0, 1fr);
  }

  .inspector {
    grid-column: 1 / -1;
  }
}

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .workspace-header {
    flex-direction: column;
    gap: 14px;
  }

  .workspace-tools {
    width: 100%;
    justify-content: stretch;
  }

  .workspace-meta {
    width: 100%;
    text-align: center;
  }

  .canvas-stage {
    padding: 18px;
  }

  .field-row,
  .tool-grid {
    grid-template-columns: 1fr;
  }

  .zoom-controls {
    display: grid;
    width: 100%;
  }
}

@media print {
  body {
    background: #fff;
  }

  .sidebar,
  .inspector,
  .workspace-header {
    display: none !important;
  }

  .app-shell {
    display: block;
    padding: 0;
  }

  .workspace {
    display: block;
  }

  .canvas-stage {
    display: block !important;
    background: transparent;
    padding: 0;
    overflow: visible;
    box-shadow: none;
  }

  .paper-shadow,
  .paper {
    box-shadow: none;
  }

  .paper {
    margin: 0;
    transform: none !important;
  }

  .paper-viewport {
    width: auto !important;
    height: auto !important;
  }
}