/* ─── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0f1117;
  --bg-2: #161b27;
  --bg-3: #1e2535;
  --border: #2a3147;
  --border-light: #353e58;
  --text: #e2e8f0;
  --text-muted: #7c8db5;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --pink: #ec4899;
  --danger: #ef4444;
  --danger-hover: #f87171;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

html, body {
  height: 100%;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

/* ─── Header ───────────────────────────────────────────────── */
header {
  height: 56px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1600px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  color: var(--text);
}

.logo strong { color: var(--accent); }

nav { display: flex; gap: 10px; }

/* ─── Buttons ──────────────────────────────────────────────── */
.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background 0.15s, transform 0.1s;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:active { transform: scale(0.97); }
.btn-full { width: 100%; justify-content: center; margin-top: 4px; }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border-light);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  transition: color 0.15s, border-color 0.15s;
}
.btn-ghost:hover { color: var(--text); border-color: var(--accent); }

.btn-sm {
  background: var(--bg-3);
  color: var(--text);
  border: 1px solid var(--border-light);
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  transition: background 0.15s, border-color 0.15s;
}
.btn-sm:hover { background: var(--border); border-color: var(--accent); }
.btn-sm.btn-danger { color: var(--danger); border-color: var(--danger); }
.btn-sm.btn-danger:hover { background: rgba(239,68,68,0.1); }

/* ─── Layout ───────────────────────────────────────────────── */
main {
  display: grid;
  grid-template-columns: 280px 1fr;
  height: calc(100vh - 56px);
  overflow: hidden;
}

/* ─── Sidebar ──────────────────────────────────────────────── */
.sidebar {
  background: var(--bg-2);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 4px; }

.panel {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.panel h2 {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.field-group label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}

.field-group input[type="text"],
.field-group select {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 7px 10px;
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s;
  width: 100%;
}
.field-group input[type="text"]:focus,
.field-group select:focus {
  border-color: var(--accent);
}
.field-group select option { background: var(--bg-2); }

.slider-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.slider-row input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
  cursor: pointer;
}
.slider-row span {
  width: 34px;
  text-align: right;
  font-size: 12px;
  color: var(--text-muted);
}

.toggle-row {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}
.toggle-row label:first-child { flex: 1; }

/* Toggle switch */
.toggle { position: relative; display: inline-block; width: 36px; height: 20px; }
.toggle input { opacity: 0; width: 0; height: 0; }
.slider-toggle {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 20px;
  cursor: pointer;
  transition: background 0.2s;
}
.slider-toggle::before {
  content: '';
  position: absolute;
  width: 14px; height: 14px;
  left: 3px; top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.2s;
}
.toggle input:checked + .slider-toggle { background: var(--accent); }
.toggle input:checked + .slider-toggle::before { transform: translateX(16px); }

/* Contour sub-controls */
.contour-controls {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px;
  background: rgba(99,102,241,0.06);
  border: 1px solid rgba(99,102,241,0.2);
  border-radius: var(--radius-sm);
  margin-top: -2px;
}
.contour-controls.hidden { display: none; }

.color-picker-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.color-picker-row input[type="color"] {
  width: 36px;
  height: 28px;
  padding: 2px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: var(--bg-2);
  cursor: pointer;
}
.color-picker-row span {
  font-size: 12px;
  color: var(--text-muted);
  font-family: monospace;
  flex: 1;
}

/* Background switcher */
.bg-switcher {
  display: flex;
  gap: 6px;
}
.bg-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: 6px 4px;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
}
.bg-btn:hover { border-color: var(--accent); color: var(--text); }
.bg-btn.active { border-color: var(--accent); color: var(--accent); background: rgba(99,102,241,0.1); }
.bg-swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  border: 1px solid var(--border-light);
  flex-shrink: 0;
}
.bg-swatch.dark  { background: #0f1117; }
.bg-swatch.light { background: #ffffff; }
.bg-swatch.black { background: #000000; }

/* Axis row (title + integers toggle side by side) */
.axis-row {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}
.axis-title-field { flex: 1; }
.axis-int-field {
  flex-shrink: 0;
  align-items: center;
}
.axis-int-field label:first-child {
  font-size: 11px;
  white-space: nowrap;
}

.range-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-top: -4px;
  margin-bottom: 6px;
  padding-left: 2px;
}
.range-row .field-group label {
  font-size: 11px;
  color: var(--text-muted);
}
.range-row input[type="number"] {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 5px 8px;
  font-size: 12px;
  width: 100%;
  outline: none;
  transition: border-color 0.15s;
}
.range-row input[type="number"]:focus { border-color: var(--accent); }
.range-row input[type="number"]::placeholder { color: var(--text-muted); opacity: 0.6; }

/* Camera presets */
.camera-presets {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}
.preset-btn {
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 6px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 12px;
  transition: all 0.15s;
}
.preset-btn:hover, .preset-btn.active {
  background: var(--bg-3);
  border-color: var(--accent);
  color: var(--accent);
}

/* ─── Workspace ────────────────────────────────────────────── */
.workspace {
  display: grid;
  grid-template-rows: auto 1fr;
  overflow: hidden;
  background: var(--bg);
}

/* ─── Data Section ─────────────────────────────────────────── */
.data-section {
  padding: 16px 20px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 260px;
}

.data-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.data-header h2 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
}

.data-actions { display: flex; gap: 6px; }

.table-wrapper {
  overflow: auto;
  flex: 1;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.table-wrapper::-webkit-scrollbar { width: 5px; height: 5px; }
.table-wrapper::-webkit-scrollbar-track { background: var(--bg); }
.table-wrapper::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 4px; }

#table-container table {
  border-collapse: collapse;
  min-width: 100%;
}

#table-container td {
  border: 1px solid var(--border);
  padding: 0;
  min-width: 90px;
}

#table-container td input {
  width: 100%;
  background: var(--bg-2);
  border: none;
  outline: none;
  color: var(--text);
  padding: 6px 10px;
  font-size: 13px;
  text-align: center;
  transition: background 0.12s;
}
#table-container td input:focus { background: var(--bg-3); }

/* Header cells (first row / first col) */
#table-container tr:first-child td input,
#table-container td:first-child input {
  color: var(--accent-hover);
  font-weight: 600;
  background: rgba(99,102,241,0.07);
}
#table-container tr:first-child td:first-child input {
  color: var(--text-muted);
  font-weight: 400;
  font-style: italic;
  font-size: 11px;
}

.hint {
  font-size: 11px;
  color: var(--text-muted);
  padding-top: 2px;
}

/* ─── Delete buttons ───────────────────────────────────────────── */
.col-header-cell {
  position: relative;
}

.del-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1;
  padding: 0;
  transition: color 0.15s, opacity 0.15s;
  opacity: 0;
}
.del-btn:hover { color: var(--danger); }

/* Show column delete button on header cell hover */
.col-header-cell:hover .del-col-btn,
#table-container tr:hover .del-row-btn {
  opacity: 1;
}

.del-col-btn {
  position: absolute;
  top: 3px;
  right: 4px;
  font-size: 13px;
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 3px;
}
.del-col-btn:hover { background: rgba(239,68,68,0.15); }

.del-row-cell {
  border: 1px solid var(--border);
  padding: 0 4px;
  width: 28px;
  min-width: 28px;
  text-align: center;
}

.del-row-btn {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 3px;
  margin: auto;
}
.del-row-btn:hover { background: rgba(239,68,68,0.15); }

.del-corner {
  border: 1px solid var(--border);
  width: 28px;
  min-width: 28px;
  background: var(--bg);
}

/* ─── Chart Section ────────────────────────────────────────── */
.chart-section {
  position: relative;
  flex: 1;
  overflow: hidden;
}

.chart-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.placeholder-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  opacity: 0.4;
}
.placeholder-inner p { font-size: 14px; color: var(--text-muted); text-align: center; }

/* ─── Responsive ───────────────────────────────────────────── */
@media (max-width: 900px) {
  main {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
    height: auto;
    overflow: auto;
  }
  .sidebar {
    border-right: none;
    border-bottom: 1px solid var(--border);
    overflow-y: visible;
  }
  .workspace {
    height: auto;
    min-height: 600px;
  }
  .chart-section { height: 460px; position: relative; }
  .chart-placeholder, #chart { height: 100%; }
}