/* Architecture Compiler — demo walkthroughs */

:root {
  --bg: #fafafa;
  --fg: #222;
  --muted: #666;
  --accent: #2e6fd6;
  --accent-soft: #e8f0ff;
  --warn: #b06000;
  --warn-soft: #fff5e6;
  --code-bg: #1e1e1e;
  --code-fg: #d4d4d4;
  --border: #e1e1e1;
}

html, body {
  margin: 0;
  padding: 0;
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 30px 24px 80px;
}

h1 {
  font-size: 1.75rem;
  margin: 0 0 6px;
}

h2 {
  font-size: 1.1rem;
  margin: 32px 0 6px;
  color: var(--accent);
}

.overview {
  color: var(--muted);
  font-size: 1.0rem;
  margin: 0 0 28px;
  max-width: 880px;
}

.breadcrumb {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 12px;
}
.breadcrumb a { color: var(--accent); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

/* steps */
.step {
  background: white;
  border: 1px solid var(--border);
  border-radius: 6px;
  margin: 24px 0;
  padding: 22px 24px 18px;
}
.step-header {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 6px;
}
.step-num {
  display: inline-block;
  width: 28px; height: 28px;
  background: var(--accent);
  color: white;
  font-weight: 600;
  text-align: center;
  line-height: 28px;
  border-radius: 50%;
  font-size: 0.85rem;
  flex: 0 0 28px;
}
.step-label {
  font-weight: 600;
  font-size: 1.05rem;
}
.step-narration {
  color: var(--muted);
  margin: 4px 0 16px 42px;
}
.step-narration p { margin: 6px 0; }

/* panel layout */
.panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.panels.single { grid-template-columns: 1fr; }
.panel {
  background: var(--code-bg);
  border-radius: 4px;
  overflow: hidden;
}
.panel-title {
  background: #2a2a2a;
  color: #aaa;
  font-size: 0.78rem;
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  padding: 6px 14px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.panel pre {
  margin: 0;
  padding: 14px 16px;
  color: var(--code-fg);
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: 0.82rem;
  line-height: 1.5;
  overflow-x: auto;
  max-height: 700px;
  overflow-y: auto;
  white-space: pre;
}

/* "Compiler value" comment lines wrap so reader doesn't have to scroll
   right to read multi-sentence rationale. YAML structure (indented keys)
   doesn't wrap. */
.panel pre .tk-comment-wrap {
  display: block;
  white-space: pre-wrap;
  word-wrap: break-word;
  padding-right: 6px;
}

/* Inline highlight on specific lines flagged by the scenario for the
   reader's attention (e.g., `hosting: n8n` in step 1). */
.tk-line-attention {
  display: inline-block;
  width: 100%;
  background: rgba(255, 215, 0, 0.18);
  border-left: 3px solid #d4b800;
  padding-left: 6px;
  margin-left: -9px;
}

/* Per-value highlight — solid yellow pill with black text on the
   actual value, e.g., the word `n8n` inside `hosting: n8n`. */
.hl-value {
  color: #1a1a1a;
  background: rgb(255, 255, 0);
  font-weight: 800;
  padding: 1px 7px;
  border-radius: 3px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.25);
}

/* Diff-style add/remove markers for pattern selection changes between
   compile steps. */
.tk-line-added {
  display: inline-block;
  width: 100%;
  background: rgba(74, 124, 44, 0.20);
  border-left: 3px solid #4a7c2c;
  padding-left: 6px;
  margin-left: -9px;
}
.tk-line-removed {
  display: inline-block;
  width: 100%;
  background: rgba(176, 32, 32, 0.18);
  border-left: 3px solid #b02020;
  padding-left: 6px;
  margin-left: -9px;
  text-decoration: line-through;
}

/* Approval header — comment lines at top of architecture.yaml with a
   distinct visual treatment. */
.tk-approval-header {
  display: inline-block;
  width: 100%;
  background: rgba(74, 124, 44, 0.20);
  border-left: 3px solid #4a7c2c;
  padding-left: 6px;
  margin-left: -9px;
  font-weight: 600;
}

/* Disclosure block: <details> renders inline so the reader can expand
   to see trimmed compile output without leaving the page. */
.panel details {
  margin: 4px 0 4px 0;
}
.panel details summary {
  cursor: pointer;
  color: var(--accent);
  font-style: italic;
}
.panel details summary:hover {
  text-decoration: underline;
}
.panel details[open] summary {
  margin-bottom: 6px;
}
.panel details > pre {
  padding: 6px 10px;
  margin: 0;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 3px;
}

/* YAML syntax highlighting (custom, minimal) */
.tk-key      { color: #9cdcfe; }
.tk-str      { color: #ce9178; }
.tk-num      { color: #b5cea8; }
.tk-bool     { color: #569cd6; }
.tk-null     { color: #569cd6; font-style: italic; }
.tk-comment  { color: #6a9955; font-style: italic; }
.tk-anchor   { color: #d7ba7d; }
.tk-warn-line {
  background: rgba(255, 165, 0, 0.30);
  border-left: 3px solid #ff8c00;
  padding-left: 6px;
  margin-left: -9px;
  display: inline-block;
  width: 100%;
  color: #ffdb99;
  font-weight: 500;
}

/* warn / decision callouts */
.callout {
  margin: 16px 0 0 42px;
  padding: 10px 14px;
  border-left: 3px solid var(--warn);
  background: var(--warn-soft);
  border-radius: 0 4px 4px 0;
  color: #4a3000;
  font-size: 0.92rem;
  /* Long warn descriptions wrap rather than overflow horizontally. */
  white-space: normal;
  overflow-wrap: break-word;
}
.callout code {
  background: rgba(0, 0, 0, 0.06);
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 0.88em;
}
.callout em {
  font-style: normal;
  font-weight: 600;
  background: rgba(176, 96, 0, 0.18);
  padding: 0 3px;
  border-radius: 2px;
}
.callout.clean {
  border-left-color: #4a7c2c;
  background: #f0f7ea;
  color: #2c4a18;
}
.callout strong { letter-spacing: 0.02em; }

/* index page cards */
.demo-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 16px;
  margin-top: 24px;
}
.demo-card {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 18px 20px;
  background: white;
  text-decoration: none;
  color: inherit;
  transition: border-color 120ms;
}
.demo-card:hover {
  border-color: var(--accent);
}
.demo-card h3 {
  margin: 0 0 6px;
  color: var(--accent);
}
.demo-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.93rem;
}

.conclusion {
  margin: 40px 0 20px;
  padding: 20px 24px;
  background: white;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
}
.conclusion h2 {
  margin: 0 0 12px;
  font-size: 1.15rem;
  color: var(--accent);
}
.conclusion p, .conclusion li { font-size: 0.95rem; }
.conclusion code {
  background: rgba(0, 0, 0, 0.06);
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 0.88em;
}

footer {
  margin-top: 60px;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}