:root {
  --bg: #f4f5f7;
  --panel-bg: #ffffff;
  --border: #d9dce1;
  --text: #1f2430;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}

h1, h2, h3 { margin: 0 0 8px; }

.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: var(--panel-bg);
  border-bottom: 1px solid var(--border);
}

.topbar h1 { font-size: 18px; }

.page { padding: 24px; max-width: 900px; margin: 0 auto; }

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.project-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.project-table th, .project-table td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.project-table tr:last-child td { border-bottom: none; }
.project-table .empty { color: var(--muted); text-align: center; }
.project-table a { color: var(--accent); text-decoration: none; }
.project-table a:hover { text-decoration: underline; }

.btn {
  padding: 7px 14px;
  font-size: 13px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  cursor: pointer;
}
.btn:hover { background: #f0f1f3; }
.btn:disabled { opacity: .45; cursor: default; background: #fff; }
.btn:disabled:hover { background: #fff; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-danger { background: #fff; border-color: var(--danger); color: var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-ghost { background: transparent; border-color: transparent; color: var(--muted); text-decoration: none; display: inline-flex; align-items: center; padding: 7px 10px; }
.btn-ghost:hover { color: var(--text); }
.btn-block { width: 100%; margin-top: 6px; }
.btn-row { display: flex; gap: 6px; margin-top: 6px; }
.btn-row .btn { flex: 1; }

.toggle-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* Editor layout */
.editor-body { height: 100vh; overflow: hidden; }
.editor-topbar { justify-content: flex-start; }
.topbar-spacer { flex: 1; }
.project-name-input {
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  background: transparent;
  padding: 6px 8px;
  border-radius: 6px;
  min-width: 220px;
}
.project-name-input:hover, .project-name-input:focus { border-color: var(--border); background: #fff; }
.save-status { font-size: 12px; color: var(--muted); min-width: 90px; text-align: right; }

.editor-layout {
  display: flex;
  height: calc(100vh - 49px);
}

.side-panel {
  width: 260px;
  flex-shrink: 0;
  background: var(--panel-bg);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 12px;
}
.side-panel-right { border-right: none; border-left: 1px solid var(--border); }

.panel-section {
  padding-bottom: 14px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.panel-section:last-child { border-bottom: none; }
.panel-section h3 { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }

.field-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}
.field-row label { font-size: 13px; color: var(--text); }
.field-row input, .field-row select {
  width: 110px;
  padding: 5px 6px;
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: 5px;
}

.hint { font-size: 11px; color: var(--muted); margin: 6px 0; line-height: 1.4; }
.align-group-label { margin: 10px 0 2px; }

.segmented { display: flex; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.segmented-btn {
  flex: 1;
  padding: 7px 6px;
  font-size: 13px;
  border: none;
  background: #fff;
  cursor: pointer;
}
.segmented-btn.active { background: var(--accent); color: #fff; }

.vertex-list { max-height: 160px; overflow-y: auto; margin-top: 8px; }
.vertex-row {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 4px;
  font-size: 12px;
}
.vertex-row input { width: 60px; padding: 3px 4px; font-size: 12px; border: 1px solid var(--border); border-radius: 4px; }
.vertex-row .vertex-del { cursor: pointer; color: var(--danger); border: none; background: none; font-size: 14px; }

.canvas-area {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: #e8eaed;
}
.canvas-wrap { width: 100%; height: 100%; }
#scene { display: block; cursor: default; background: #e8eaed; }
#scene.tool-active { cursor: crosshair; }

.hidden { display: none !important; }

.print-sheet { display: none; }

@media print {
  .no-print { display: none !important; }
  body.editor-body { height: auto; overflow: visible; background: #fff; }
  .print-sheet {
    display: block;
    padding: 20px;
  }
  .print-sheet h2 { margin: 0 0 4px; }
  .print-sheet .print-meta { font-size: 12px; color: #444; margin-bottom: 16px; }
}