*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #F7F8FC;
  --panel-bg: #FFFFFF;
  --border: #E2E8F0;
  --text: #1A202C;
  --muted: #718096;
  --accent: #4A90D9;
  --radius: 10px;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ── Header ── */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 56px;
  background: var(--panel-bg);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  flex-shrink: 0;
  z-index: 10;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.3px;
  margin: 0;
  padding: 0;
  line-height: inherit;
}

.logo-icon {
  width: 28px;
  height: 28px;
}

.badge {
  background: #EBF4FF;
  color: var(--accent);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 99px;
  letter-spacing: 0.3px;
  margin-top: 2px;
}

/* ── Tab Nav ── */
.tab-nav {
  display: flex;
  gap: 2px;
  margin-left: 8px;
}

.tab-btn {
  padding: 5px 14px;
  border: none;
  border-radius: 7px;
  background: none;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s;
}

.tab-btn:hover { color: var(--text); background: var(--bg); }
.tab-btn.active { background: #EBF4FF; color: var(--accent); }

/* ── Controls ── */
/* ── Canvas area ── */
.canvas-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.canvas-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 42px;
  padding: 0 14px;
  background: var(--panel-bg);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

/* ── Canvas stage: fills remaining space, centers the container for size preview ── */
.canvas-stage {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: radial-gradient(circle at 50% 50%, #EFF3FB 0%, #F7F8FC 70%);
}

.canvas-stage::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, #CBD5E0 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.45;
  pointer-events: none;
}

/* Dim the outer area when a size preset is active, to show container boundaries */
.canvas-stage.sized { background: #CDD4E2; }
.canvas-stage.sized::before { opacity: 0.15; }

/* The mind map container */
#porphyry-container {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 50% 50%, #EFF3FB 0%, #F7F8FC 70%);
  z-index: 1;
}

#porphyry-container::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, #CBD5E0 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.45;
  pointer-events: none;
}

/* Shadow to highlight container edges when constrained to a specific size */
.canvas-stage.sized #porphyry-container {
  box-shadow: 0 4px 32px rgba(0,0,0,0.18);
}

/* ── Demo size preview HUD ── */
.demo-size-hud {
  position: absolute;
  bottom: 12px;
  left: 12px;
  z-index: 20;
  opacity: 0.4;
  transition: opacity 0.2s;
  display: flex;
  align-items: center;
  gap: 5px;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 5px 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.demo-size-hud:hover { opacity: 1; }

.demo-dim-input {
  width: 52px;
  padding: 3px 5px;
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text);
  background: var(--bg);
  font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
  text-align: center;
  outline: none;
  -moz-appearance: textfield;
}
.demo-dim-input:focus { border-color: var(--accent); }
.demo-dim-input::-webkit-inner-spin-button,
.demo-dim-input::-webkit-outer-spin-button { -webkit-appearance: none; }

.demo-dim-sep {
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
}

.demo-dim-unit {
  font-size: 10px;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.3px;
}

.demo-dim-reset {
  border: none;
  background: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 14px;
  padding: 0 2px;
  line-height: 1;
  transition: color 0.12s;
}
.demo-dim-reset:hover { color: var(--accent); }


.btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-bg);
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
}

.btn:hover { background: #F0F4FF; border-color: var(--accent); color: var(--accent); }
.btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn.primary:hover { background: #3A7CC5; border-color: #3A7CC5; color: #fff; }

.layout-toggle {
  display: flex;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2px;
  gap: 2px;
}

.toggle-btn {
  padding: 4px 11px;
  border: none;
  border-radius: 6px;
  background: none;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.toggle-btn:hover { color: var(--text); background: var(--panel-bg); }
.toggle-btn.active { background: var(--panel-bg); color: var(--accent); box-shadow: 0 1px 3px rgba(0,0,0,0.1); }

.separator { width: 1px; height: 24px; background: var(--border); margin: 0 4px; }

.spacing-wrap {
  display: flex; align-items: center; gap: 7px;
}
.spacing-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 80px; height: 4px;
  border-radius: 2px;
  background: var(--border);
  cursor: pointer;
  outline: none;
  accent-color: var(--accent);
}
.spacing-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}
.spacing-slider::-moz-range-thumb {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}
.spacing-value {
  font-size: 12px; font-weight: 600;
  color: var(--text); min-width: 30px; text-align: left;
}

.theme-select {
  appearance: none;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 4px 24px 4px 9px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23718096'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 7px center;
  transition: border-color 0.15s;
}
.theme-select:hover { border-color: var(--accent); }
.theme-select:focus { outline: none; border-color: var(--accent); }

.interact-toggle {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
}
.interact-toggle input { accent-color: var(--accent); cursor: pointer; }
.interact-toggle:hover { color: var(--text); }

/* ── Layout ── */
main {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.workspace {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.workspace-body {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.workspace.hidden  { display: none; }

/* ── Sidebar ── */
.sidebar {
  width: 300px;
  flex-shrink: 0;
  background: var(--panel-bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: visible;
  transition: width 0.22s ease, min-width 0.22s ease;
  position: relative;
}

/* Clip only the content, not the toggle button */
.sidebar-header,
.examples-wrap,
.json-editor-wrap {
  overflow: hidden;
}

.sidebar.collapsed {
  width: 0 !important;
  min-width: 0 !important;
  border-right: none;
  overflow: hidden;
}

/* Toggle button on the sidebar/canvas boundary */
.workspace-body {
  position: relative;
}

.sidebar-toggle {
  position: absolute;
  top: 50%;
  left: 287px;
  transform: translateY(-50%);
  z-index: 20;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  box-shadow: 0 1px 4px rgba(0,0,0,0.12);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--muted);
  transition: color 0.15s, background 0.15s, left 0.22s ease;
  flex-shrink: 0;
}
.sidebar-toggle:hover { background: #EBF4FF; color: var(--accent); border-color: var(--accent); }
.sidebar-toggle.collapsed { left: -13px; }

/* Chevron button inside Examples header */
.examples-toggle {
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--muted);
  padding: 2px 4px;
  border-radius: 4px;
  font-size: 11px;
  line-height: 1;
  transition: color 0.15s, background 0.15s;
  display: flex;
  align-items: center;
}
.examples-toggle:hover { color: var(--accent); background: #EBF4FF; }

.examples-wrap {
  overflow-y: auto;
  transition: max-height 0.22s ease, opacity 0.22s ease;
  max-height: 600px;
  opacity: 1;
}
.examples-wrap.collapsed {
  max-height: 0;
  opacity: 0;
}

.sidebar-header {
  height: 42px;
  display: flex;
  align-items: center;
  padding: 0 16px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.examples {
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.example-btn {
  display: block;
  width: 100%;
  text-align: left;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  background: none;
  cursor: pointer;
  transition: all 0.12s;
}

.example-btn:hover { background: #F0F4FF; color: var(--accent); }
.example-btn.active { background: #EBF4FF; border-color: #BDD7F5; color: var(--accent); }

.example-btn small {
  display: block;
  font-size: 11px;
  font-weight: 400;
  color: var(--muted);
  margin-top: 2px;
}

.json-editor-wrap {
  flex: 1;
  min-height: 40%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-top: 1px solid var(--border);
}

.json-editor-label {
  height: 42px;
  display: flex;
  align-items: center;
  padding: 0 16px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--muted);
}

textarea#json-editor {
  flex: 1;
  resize: none;
  border: none;
  outline: none;
  padding: 10px 16px;
  font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
  font-size: 11.5px;
  line-height: 1.6;
  color: #2D3748;
  background: #FAFBFE;
  border-top: 1px solid var(--border);
}

.json-error {
  padding: 8px 16px;
  font-size: 12px;
  color: #E53E3E;
  background: #FFF5F5;
  border-top: 1px solid #FED7D7;
  display: none;
}

.json-error:not(:empty) { display: flex; align-items: center; }

.apply-btn {
  margin: 10px;
  padding: 9px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.apply-btn:hover { background: #3A7CC5; }

/* ── Docs Panel ── */
.docs-panel {
  display: none;
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  background: var(--bg);
  padding: 48px 0 0;
}

.docs-panel.active { display: block; }

.docs-content {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 32px;
}

.docs-hero {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

.docs-hero-text h1 {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text);
}

.docs-hero-text p {
  margin-top: 6px;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.6;
}

.docs-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
}

.docs-section {
  margin-bottom: 44px;
}

.docs-section h2 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.7px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.docs-section h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin: 20px 0 8px;
}

.docs-section p {
  font-size: 14px;
  line-height: 1.7;
  color: #4A5568;
  margin-bottom: 12px;
}

.docs-section ul {
  padding-left: 18px;
  margin-bottom: 12px;
}

.docs-section li {
  font-size: 14px;
  line-height: 1.7;
  color: #4A5568;
  margin-bottom: 4px;
}

pre {
  background: #1A1F2E;
  color: #E2E8F0;
  border-radius: 10px;
  padding: 18px 20px;
  font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
  font-size: 12.5px;
  line-height: 1.7;
  overflow-x: auto;
  margin: 12px 0 20px;
  position: relative;
}

pre .cm  { color: #68D391; }   /* comment — green */
pre .kw  { color: #76E4F7; }   /* keyword — cyan */
pre .st  { color: #FBD38D; }   /* string — amber */
pre .nm  { color: #B794F4; }   /* number/bool — violet */
pre .fn  { color: #90CDF4; }   /* function name — blue */
pre .ky  { color: #FC8181; }   /* key — red */

code {
  background: #EBF4FF;
  color: #2B6CB0;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
  font-size: 12.5px;
}

.prop-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  font-size: 13px;
  margin: 12px 0 20px;
}

.prop-table th {
  text-align: left;
  padding: 8px 12px;
  background: #F0F4FF;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
}

.prop-table td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  line-height: 1.5;
  color: #4A5568;
  word-break: break-word;
  overflow-wrap: break-word;
}

.prop-table td:first-child {
  font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
  font-size: 12px;
  color: #2B6CB0;
  white-space: nowrap;
  width: 34%;
}

.prop-table td:nth-child(2) {
  color: #805AD5;
  font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
  font-size: 12px;
}

/* 3-column tables: shrink first two columns, let description fill the rest */
.prop-table td:nth-child(3) ~ td,
.prop-table th:nth-child(3) ~ th { width: auto; }
.prop-table:has(td:nth-child(3)):not(:has(td:nth-child(4))) td:first-child { width: 22%; }
.prop-table:has(td:nth-child(3)):not(:has(td:nth-child(4))) td:nth-child(2) { width: 12%; white-space: nowrap; }

.prop-table tr:last-child td { border-bottom: none; }
.prop-table tr:hover td { background: #FAFBFE; }

.callout {
  background: #EBF4FF;
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  padding: 12px 16px;
  font-size: 13.5px;
  color: #2C5282;
  line-height: 1.6;
  margin: 12px 0 20px;
}

/* ── Footer ── */
footer {
  flex-shrink: 0;
  text-align: center;
  padding: 10px;
  font-size: 12px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  background: var(--panel-bg);
}

footer a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

footer a:hover { text-decoration: underline; }