:root {
  --bg: #d9e2ee;
  --surface: #f8f8fb;
  --ink: #1b2330;
  --muted: #5f6675;
  --border: #c7cede;
  --brand: #237ce9;
  --tab: #5d6389;
  --accent: #f23b5e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
}

.topbar {
  background: var(--brand);
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.28);
}

.chart-tabs {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.chart-tab {
  border: 1px solid transparent;
  background: transparent;
  color: #ebf3ff;
  border-radius: 0.45rem;
  padding: 0.42rem 0.7rem;
  cursor: pointer;
  font-size: 0.98rem;
}

.chart-tab.active {
  background: rgba(255, 255, 255, 0.17);
  border-color: rgba(255, 255, 255, 0.35);
  color: #ffffff;
  font-weight: 700;
}

.layout {
  display: grid;
  grid-template-columns: 40% 60%;
  min-height: calc(100vh - 56px);
}

.left-panel {
  background: #e6e7ec;
  border-right: 1px solid #cfd3dd;
  padding: 0.85rem;
}

.panel-tabs {
  background: var(--tab);
  border-radius: 0.45rem 0.45rem 0 0;
  padding: 0.45rem;
  display: flex;
  gap: 0.45rem;
}

.panel-tab {
  background: transparent;
  border: none;
  color: #dce3f9;
  border-bottom: 2px solid transparent;
  padding: 0.4rem 0.5rem;
  cursor: pointer;
  font-size: 1.02rem;
}

.panel-tab.active {
  color: #ffffff;
  border-bottom-color: #ffffff;
  font-weight: 700;
}

.panel-body {
  background: var(--surface);
  border: 1px solid #d2d6e2;
  border-top: none;
  border-radius: 0 0 0.45rem 0.45rem;
  padding: 0.7rem;
  min-height: 620px;
}

.panel-body.hidden {
  display: none;
}

.table-wrap {
  overflow: auto;
  max-height: 510px;
  border: 1px solid #d0d5de;
  background: #ffffff;
}

.data-grid {
  width: 100%;
  border-collapse: collapse;
  min-width: 540px;
}

.data-grid th,
.data-grid td {
  border: 1px solid #d6dae2;
  min-width: 90px;
  height: 38px;
  padding: 0.2rem;
}

.data-grid .color-col {
  min-width: 56px;
  width: 56px;
}

.data-grid .color-cell {
  min-width: 56px;
  width: 56px;
  text-align: center;
  background: #f4f6fb;
}

.data-grid .color-cell-header {
  color: #7a849a;
  font-weight: 600;
}

.row-color-input {
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid #bcc5da;
  border-radius: 0.35rem;
  background: transparent;
  cursor: pointer;
}

.row-color-input::-webkit-color-swatch-wrapper {
  padding: 0;
}

.row-color-input::-webkit-color-swatch {
  border: none;
  border-radius: 0.22rem;
}

.data-grid th {
  background: #f2f4f9;
  text-align: center;
  font-weight: 700;
  color: #495371;
}

.data-grid input {
  width: 100%;
  border: none;
  background: transparent;
  padding: 0.2rem;
  color: #28324a;
}

.row-actions {
  margin-top: 0.55rem;
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
}

label {
  display: grid;
  gap: 0.2rem;
  margin-bottom: 0.55rem;
  color: #4f5a77;
  font-size: 0.9rem;
}

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

textarea,
input,
select {
  border: 1px solid #cfd5e4;
  border-radius: 0.4rem;
  padding: 0.42rem;
  background: #ffffff;
  color: #1d2534;
}

textarea {
  min-height: 170px;
  resize: vertical;
}

button {
  border: 1px solid #b8c0d6;
  border-radius: 0.45rem;
  padding: 0.4rem 0.68rem;
  background: #ffffff;
  color: #202b40;
  cursor: pointer;
}

button.primary {
  border-color: #2ca10f;
  color: #1e7e08;
  font-weight: 700;
}

.right-panel {
  padding: 1rem;
}

.preview-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-bottom: 0.7rem;
}

.preview-wrap {
  background: #ffffff;
  border: 1px solid #c9cfdb;
  padding: 0.75rem;
  overflow: auto;
}

#chart-canvas {
  width: 100%;
  max-width: 960px;
  height: auto;
  display: block;
  margin: 0 auto;
  background: #ffffff;
}

.status {
  margin: 0.65rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.hint {
  margin: 0 0 0.55rem;
  color: var(--muted);
  font-size: 0.88rem;
}

@media (max-width: 1100px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .panel-body {
    min-height: 360px;
  }
}