:root {
  --ink: #1b1f23;
  --paper: #f6f5f1;
  --accent: #b65c2b;
  --accent-dim: #e9d3c4;
  --line: #e1ddd3;
  --panel: #ffffff;
  --muted: #6b6b63;
  --danger: #b3382c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--paper);
  color: var(--ink);
}

#app { display: flex; flex-direction: column; height: 100vh; }

/* ---------------- topbar ---------------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 18px;
  background: var(--ink);
  color: #fff;
  border-bottom: 3px solid var(--accent);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.brand-mark {
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  border-radius: 4px;
  padding: 4px 6px;
  letter-spacing: 0.5px;
}
.brand-name { font-size: 15px; }
.layout-name-input {
  flex: 1;
  max-width: 360px;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 6px;
  color: #fff;
  padding: 7px 10px;
  font-size: 13px;
}
.layout-name-input::placeholder { color: rgba(255,255,255,0.5); }
.topbar-actions { display: flex; gap: 8px; }

.btn {
  border: none;
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity .15s ease;
}
.btn:hover { opacity: 0.85; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-secondary { background: var(--accent-dim); color: var(--ink); }
.btn-ghost { background: rgba(255,255,255,0.12); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.full-width { width: 100%; margin-top: 8px; }

/* ---------------- workspace layout ---------------- */
.workspace { flex: 1; display: flex; min-height: 0; }

.toolbox {
  width: 210px;
  background: var(--panel);
  border-right: 1px solid var(--line);
  padding: 16px 12px;
  overflow-y: auto;
}
.tool-group { margin-bottom: 22px; }
.tool-group-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 8px;
  font-weight: 700;
}
.tool-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  text-align: left;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 9px 10px;
  margin-bottom: 6px;
  font-size: 13px;
  cursor: pointer;
  color: var(--ink);
}
.tool-btn:hover { border-color: var(--accent); background: var(--accent-dim); }
.tool-icon { width: 18px; text-align: center; font-weight: 700; color: var(--accent); }

.field-picker, .prop-input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 7px 9px;
  font-size: 13px;
  background: #fff;
  color: var(--ink);
}
.mono { font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 11px; }

.canvas-area {
  flex: 1;
  overflow: auto;
  display: flex;
  justify-content: center;
  padding: 36px 20px;
  background: repeating-linear-gradient(45deg, #efece4 0 1px, transparent 1px 14px);
}
.page-shadow {
  box-shadow: 0 6px 24px rgba(0,0,0,0.18);
  background: #fff;
}

.properties {
  width: 260px;
  background: var(--panel);
  border-left: 1px solid var(--line);
  padding: 16px;
  overflow-y: auto;
}
.props-title { font-weight: 700; font-size: 14px; margin-bottom: 12px; }
.props-empty { color: var(--muted); font-size: 13px; }
.prop-label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 12px 0 4px;
  font-weight: 700;
}
.prop-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; align-items: end; }
.prop-check { display: flex; align-items: center; gap: 6px; font-size: 13px; margin-top: 10px; }
.prop-divider { border: none; border-top: 1px solid var(--line); margin: 18px 0 10px; }
.props-hint { font-size: 11px; color: var(--muted); line-height: 1.4; }

.column-rows { display: flex; flex-direction: column; gap: 6px; margin-bottom: 4px; }
.column-row {
  display: grid;
  grid-template-columns: 1fr 1fr 50px 64px 22px;
  gap: 4px;
  align-items: center;
}
.column-row input, .column-row select {
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 5px 6px;
  font-size: 11px;
  width: 100%;
  background: #fff;
  color: var(--ink);
}
.column-row .col-remove {
  background: var(--accent-dim);
  color: var(--danger);
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 700;
  height: 24px;
}
.column-row .col-remove:hover { background: var(--danger); color: #fff; }
.column-header-labels {
  display: grid;
  grid-template-columns: 1fr 1fr 50px 64px 22px;
  gap: 4px;
  font-size: 10px;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
  margin-bottom: 4px;
}

/* ---------------- modal ---------------- */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.55);
  display: flex; align-items: center; justify-content: center; z-index: 50;
}
.modal {
  background: #fff; border-radius: 8px; width: 70vw; height: 85vh;
  display: flex; flex-direction: column; overflow: hidden;
}
.modal-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 14px; background: var(--ink); color: #fff; font-weight: 600;
}
.preview-frame { flex: 1; border: none; }

/* ---------------- layout list page ---------------- */
.layout-list-wrap { max-width: 860px; margin: 40px auto; padding: 0 20px; }
.layout-card {
  display: flex; justify-content: space-between; align-items: center;
  background: #fff; border: 1px solid var(--line); border-radius: 8px;
  padding: 14px 18px; margin-bottom: 10px;
}

/* ---------------- layers panel ---------------- */
.layers-list {
  max-height: 220px;
  overflow-y: auto;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
}
.layer-item {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 9px;
  font-size: 12px;
  cursor: pointer;
  border-bottom: 1px solid var(--line);
}
.layer-item:last-child { border-bottom: none; }
.layer-item:hover { background: var(--accent-dim); }
.layer-item.active { background: var(--accent); color: #fff; }
.layer-icon { width: 16px; text-align: center; font-weight: 700; opacity: 0.8; flex-shrink: 0; }
.layer-label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.layer-role { font-size: 10px; opacity: 0.65; text-transform: uppercase; flex-shrink: 0; }
.layers-empty { padding: 12px; font-size: 12px; color: var(--muted); text-align: center; }

/* ---------------- z-order buttons ---------------- */
.zorder-row { display: grid; grid-template-columns: 1fr 0.6fr 0.6fr 1fr; gap: 6px; }
.zorder-row .btn { padding: 6px 4px; font-size: 12px; }

/* ---------------- column editor (item table) ---------------- */
.column-rows { display: flex; flex-direction: column; gap: 8px; margin-bottom: 8px; }
.column-row {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 7px;
}
.column-row-line1 { display: flex; gap: 5px; }
.column-row-line1 input, .column-row-line1 select { flex: 1; min-width: 0; }
.column-row-line1b { display: flex; margin-top: -1px; }
.column-row-line1b input { flex: 1; border-color: var(--accent) !important; background: #fff9f4; }
.column-row-line2 { display: flex; gap: 5px; align-items: center; }
.column-row-line2 .col-width { width: 56px; flex-shrink: 0; }
.column-row-line2 .col-align { flex: 1; min-width: 0; }
.column-row input, .column-row select {
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 5px 6px;
  font-size: 11px;
}
.column-row .col-field-select, .column-row .col-field-custom { font-family: "SF Mono", Menlo, Consolas, monospace; }
.column-row .col-remove {
  background: none; border: none; color: var(--danger);
  font-weight: 700; cursor: pointer; font-size: 14px; padding: 2px 6px;
  flex-shrink: 0;
}