:root {
  --bg: #ffffff;
  --surface: #f8fafc; /* slate-50 */
  --surface-hover: #f1f5f9; /* slate-100 */
  --border: #e2e8f0; /* slate-200 */
  --accent: #2563eb; /* blue-600 */
  --accent-hover: #1d4ed8; /* blue-700 */
  --accent-dim: rgba(37, 99, 235, 0.06);
  --text: #0f172a; /* slate-900 */
  --muted: #64748b; /* slate-500 */
  --green: #16a34a; /* green-600 */
  --green-dim: rgba(22, 163, 74, 0.08);
  --orange: #d97706; /* amber-600 */
  --orange-dim: rgba(217, 119, 6, 0.08);
  --red: #dc2626; /* red-600 */
  --sidebar-w: 260px;
  --header-h: 56px;
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px -1px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

code, pre {
  font-family: 'IBM Plex Mono', SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 13.5px;
}

/* ── HEADER ── */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  z-index: 100;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
}

.logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  overflow: hidden;
  background: none;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  padding: 1px;
}

.logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

/* Fallback SVG shown only when img fails */
.logo-icon .fallback-svg {
  display: none;
  width: 28px;
  height: 28px;
}

.logo-icon img.error + .fallback-svg {
  display: block;
}

.header-links {
  margin-left: auto;
  display: flex;
  gap: 20px;
  align-items: center;
}

.header-links a {
  color: var(--muted);
  font-size: 13.5px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 5px;
}

.header-links a:hover {
  color: var(--text);
  text-decoration: none;
}

.gh-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 12px;
  font-size: 13px;
  color: var(--text) !important;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
  box-shadow: var(--shadow);
}

.gh-btn:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
  box-shadow: none;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* ── LAYOUT ── */
.layout {
  display: flex;
  margin-top: var(--header-h);
  min-height: calc(100vh - var(--header-h));
}

/* ── SIDEBAR ── */
nav.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  position: fixed;
  top: var(--header-h);
  bottom: 0;
  left: 0;
  overflow-y: auto;
  border-right: 1px solid var(--border);
  padding: 24px 0 48px;
  background: var(--surface);
}

nav.sidebar::-webkit-scrollbar {
  width: 5px;
}

nav.sidebar::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

.nav-section {
  padding: 0 16px 4px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 20px 0 6px;
}

.nav-section:first-child {
  margin-top: 4px;
}

nav.sidebar a {
  display: block;
  padding: 6px 16px;
  font-size: 13.5px;
  color: var(--muted);
  border-left: 2px solid transparent;
  transition: all 0.15s ease;
}

nav.sidebar a:hover {
  color: var(--text);
  text-decoration: none;
  background: rgba(0, 0, 0, 0.02);
}

nav.sidebar a.active {
  border-left-color: var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
  font-weight: 500;
}

/* ── MAIN ── */
main {
  margin-left: var(--sidebar-w);
  flex: 1;
  max-width: 860px;
  padding: 48px 48px 96px;
}

/* ── SECTIONS ── */
.section {
  margin-bottom: 72px;
}

h1 {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 12px;
  color: var(--text);
}

h2 {
  font-size: 22px;
  font-weight: 600;
  margin-top: 48px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}

h3 {
  font-size: 16px;
  font-weight: 600;
  margin-top: 28px;
  margin-bottom: 10px;
  color: var(--text);
}

p {
  margin-bottom: 16px;
  color: #334155; /* slate-700 */
}

.lead {
  font-size: 17px;
  color: var(--muted);
  margin-bottom: 28px;
  line-height: 1.6;
}

/* ── HERO ── */
.hero {
  padding: 32px 0 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
}

/* ── CODE BLOCK ── */
.code-block {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin: 16px 0;
  box-shadow: var(--shadow);
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  color: var(--muted);
  background: #f1f5f9;
}

.code-header span {
  font-family: 'IBM Plex Mono', monospace;
}

.copy-btn {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--muted);
  font-size: 11px;
  padding: 2px 8px;
  cursor: pointer;
  font-family: 'IBM Plex Mono', monospace;
  transition: all 0.15s ease;
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.02);
}

.copy-btn:hover {
  color: var(--text);
  border-color: var(--accent);
}

.copy-btn.copied {
  color: var(--green);
  border-color: var(--green);
  background: var(--green-dim);
}

pre {
  padding: 16px 20px;
  overflow-x: auto;
  line-height: 1.6;
}

pre code {
  color: #1e293b;
}

/* Code Highlight Tokens */
.kw { color: #0550ae; font-weight: 500; } /* keyword */
.str { color: #1a7f37; } /* string */
.cm { color: #6e7781; font-style: italic; } /* comment */
.fn { color: #8250df; } /* function */
.num { color: #cf222e; } /* number */
.var { color: #24292f; } /* variable */

/* ── INLINE CODE ── */
p code, li code {
  background: #f1f5f9;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 5px;
  color: #0f172a;
  font-size: 12.5px;
}

/* ── CARDS ── */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px;
  transition: all 0.15s ease;
  box-shadow: var(--shadow);
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  font-size: 20px;
  margin-bottom: 10px;
}

.card-title {
  font-weight: 600;
  font-size: 14.5px;
  margin-bottom: 6px;
  color: var(--text);
}

.card-desc {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

/* ── TABLE ── */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  margin: 16px 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

th {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  background: #f8fafc;
}

td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: #334155;
  background: #ffffff;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: #f8fafc;
}

/* ── STEPS ── */
.steps {
  margin: 20px 0;
}

.step {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.step:last-child {
  border-bottom: none;
}

.step-num {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent-dim);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
  font-family: 'IBM Plex Mono', monospace;
  border: 1px solid rgba(37, 99, 235, 0.2);
}

.step-body {
  flex: 1;
}

.step-title {
  font-weight: 600;
  margin-bottom: 4px;
  font-size: 14.5px;
  color: var(--text);
}

.step-desc {
  font-size: 13.5px;
  color: var(--muted);
}

/* ── CALLOUT ── */
.callout {
  border-left: 4px solid var(--accent);
  background: var(--accent-dim);
  border-radius: 0 8px 8px 0;
  padding: 14px 18px;
  margin: 16px 0;
  font-size: 14px;
  color: #1e3a8a;
  box-shadow: var(--shadow);
}

.callout.warn {
  border-color: var(--orange);
  background: var(--orange-dim);
  color: #78350f;
}

.callout strong {
  display: block;
  margin-bottom: 4px;
}

/* ── ENHANCED DIRECTORY EXPLORER TREE ── */
.enhanced-tree {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  max-height: 480px;
  overflow-y: auto;
  margin: 16px 0;
  box-shadow: var(--shadow);
}

.tree-node {
  display: flex;
  align-items: center;
  padding: 6px 8px;
  cursor: pointer;
  border-radius: 4px;
  transition: background 0.15s ease;
  user-select: none;
}

.tree-node:hover {
  background: #f1f5f9;
}

.tree-node.selected {
  background: var(--accent-dim);
  color: var(--accent);
}

.tree-node.folder {
  font-weight: 600;
  color: #1e293b;
}

.tree-node.file {
  color: #475569;
}

.tree-expander {
  width: 16px;
  text-align: center;
  font-size: 10px;
  margin-right: 4px;
  color: var(--muted);
}

.tree-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  margin-right: 8px;
  color: var(--muted);
}

.tree-label {
  flex-grow: 1;
}

.tree-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
}

.tech-badge {
  font-size: 10px;
  font-family: 'IBM Plex Mono', monospace;
  padding: 1px 6px;
  border-radius: 3px;
  font-weight: 600;
  border: 1px solid transparent;
}

.badge-py { background: rgba(56, 189, 248, 0.08); color: #0369a1; border-color: rgba(56, 189, 248, 0.2); }
.badge-ts { background: rgba(99, 102, 241, 0.08); color: #4338ca; border-color: rgba(99, 102, 241, 0.2); }
.badge-rs { background: rgba(249, 115, 22, 0.08); color: #c2410c; border-color: rgba(249, 115, 22, 0.2); }
.badge-docker { background: rgba(14, 165, 233, 0.08); color: #0369a1; border-color: rgba(14, 165, 233, 0.2); }
.badge-db { background: rgba(16, 185, 129, 0.08); color: #047857; border-color: rgba(16, 185, 129, 0.2); }
.badge-config { background: rgba(100, 116, 139, 0.08); color: #475569; border-color: rgba(100, 116, 139, 0.2); }

.tree-desc {
  color: var(--muted);
  font-size: 11px;
  max-width: 320px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tree-children {
  margin-left: 20px;
  border-left: 1px dashed var(--border);
  padding-left: 4px;
}

.tree-children.hidden {
  display: none;
}

.explorer-details-card {
  display: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-top: 12px;
  box-shadow: var(--shadow);
  transition: all 0.2s ease;
}

.explorer-details-card.active {
  display: block;
}

.details-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 6px;
}

.details-card-title {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 600;
  font-size: 13.5px;
  color: var(--text);
}

.details-card-desc {
  font-size: 13px;
  color: #334155;
  line-height: 1.5;
}

/* ── INTERACTIVE PIPELINE SIMULATOR STYLING ── */
.pipe-node-status {
  transition: all 0.3s ease;
}

.pipe-node-status.active {
  background: #eff6ff !important;
  border-color: #bfdbfe !important;
  color: #1e40af !important;
}

.pipe-node-status.active .status-indicator-dot {
  background: #3b82f6 !important;
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.3);
  animation: pulse-indicator 1.5s infinite;
}

.pipe-node-status.success {
  background: #f0fdf4 !important;
  border-color: #bbf7d0 !important;
  color: #166534 !important;
}

.pipe-node-status.success .status-indicator-dot {
  background: #22c55e !important;
}

.pipe-node-status.failed {
  background: #fef2f2 !important;
  border-color: #fecaca !important;
  color: #991b1b !important;
}

.pipe-node-status.failed .status-indicator-dot {
  background: #ef4444 !important;
}

.pipe-node-status.gated-out {
  background: #f8fafc !important;
  border-color: var(--border) !important;
  color: #64748b !important;
  opacity: 0.6;
}

.pipe-node-status.gated-out .status-indicator-dot {
  background: #64748b !important;
}

@keyframes pulse-indicator {
  0% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4); }
  70% { box-shadow: 0 0 0 6px rgba(59, 130, 246, 0); }
  100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); }
}

/* Console Lines inside Console Output Panel */
.console-line {
  line-height: 1.6;
  margin-bottom: 4px;
}

.console-line.success {
  color: #4ade80; /* green-400 */
}

.console-line.warn {
  color: #fb923c; /* orange-400 */
}

.console-line.error {
  color: #f87171; /* red-400 */
}

/* Pathology Probability profiling chart */
.chart-bar-row {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
}

.chart-bar-label {
  width: 170px;
  flex-shrink: 0;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chart-bar-outer {
  flex-grow: 1;
  background: #e2e8f0; /* slate-200 */
  height: 12px;
  border-radius: 4px;
  overflow: hidden;
}

.chart-bar-inner {
  height: 100%;
  width: 0%;
  background: #3b82f6; /* active blue */
  border-radius: 4px;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.3s ease;
}

.chart-bar-inner.high {
  background: #ef4444; /* red danger highlight when high class probability */
}

.chart-bar-val {
  width: 45px;
  flex-shrink: 0;
  text-align: right;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12.5px;
  color: var(--muted);
  font-weight: 600;
}

/* ── FOOTER ── */
footer {
  margin-left: var(--sidebar-w);
  border-top: 1px solid var(--border);
  padding: 24px 48px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  font-size: 13px;
  color: var(--muted);
  background: #ffffff;
}

footer span {
  display: flex;
  gap: 20px;
}

footer a {
  color: var(--muted);
  font-weight: 500;
}

footer a:hover {
  color: var(--text);
  text-decoration: none;
}

/* ── RESPONSIVENESS ── */
@media (max-width: 768px) {
  nav.sidebar {
    display: none;
  }
  main {
    margin-left: 0;
    padding: 24px 20px 64px;
  }
  footer {
    margin-left: 0;
    padding: 20px;
    justify-content: center;
  }
}