/* === CSS Custom Properties === */
:root {
  /* Warm palette base (cream + muted earth tones) */
  --color-bg: #F4F3EE;
  --color-surface: #EAE8E0;
  --color-text: #151511;
  --color-text-body: #2B2B26;
  --color-text-muted: #5C5C55;
  --color-border: #DAD7CC;
  --color-rule: #CAC7BB;

  /* Accent (warm rust): links, nav, h2 left border */
  --color-accent: #BE5B37;
  --color-accent-light: rgba(190, 91, 55, 0.12);
  --color-accent-hover: #9E4A2C;

  /* Inline code: muted violet */
  --color-code-bg: rgba(117, 82, 151, 0.13);
  --color-code-text: #5E4178;

  /* Code block: warm charcoal surface */
  --color-code-block-bg: #26221E;
  --color-code-block-text: #EAE3D6;
  --color-code-header-bg: #EAE8E0;

  /* Philosophy callout: slate blue wash */
  --color-philosophy: #3A4A63;
  --color-philosophy-bg: rgba(74, 92, 120, 0.16);
  --color-philosophy-header-bg: rgba(74, 92, 120, 0.22);
  --color-philosophy-border: #4A5C78;

  /* Tip callout: muted green wash */
  --color-tip: #3A5A33;
  --color-tip-bg: rgba(69, 105, 63, 0.16);
  --color-tip-header-bg: rgba(69, 105, 63, 0.22);
  --color-tip-border: #45693F;

  /* Warning callout: muted gold wash */
  --color-warning: #6F5320;
  --color-warning-bg: rgba(153, 121, 67, 0.16);
  --color-warning-header-bg: rgba(153, 121, 67, 0.24);
  --color-warning-border: #997943;

  /* Critical callout: muted wine wash */
  --color-critical: #5E2C42;
  --color-critical-bg: rgba(129, 65, 91, 0.12);
  --color-critical-header-bg: rgba(129, 65, 91, 0.22);
  --color-critical-border: #81415B;

  /* Comparison grids: good = green, bad = wine */
  --color-good: #3A5A33;
  --color-good-bg: rgba(69, 105, 63, 0.10);
  --color-good-border: rgba(69, 105, 63, 0.30);
  --color-bad: #5E2C42;
  --color-bad-bg: rgba(129, 65, 91, 0.10);
  --color-bad-border: rgba(129, 65, 91, 0.30);

  --color-nav-bg: #EAE8E0;
  --color-nav-text: #5C5C55;
  --color-nav-active: #BE5B37;

  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --font-size-base: 16px;
  --line-height: 1.7;
  --max-width: 720px;
  --nav-width: 220px;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 3rem;

  --radius-sm: 4px;
  --radius-md: 8px;
}

/* === Reset === */
*, *::before, *::after {
  box-sizing: border-box;
}

body, h1, h2, h3, h4, p, ul, ol, figure {
  margin: 0;
  padding: 0;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* === Base Typography === */
html {
  font-size: var(--font-size-base);
}

body {
  font-family: var(--font-body);
  line-height: var(--line-height);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

h1 {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
  line-height: 1.6;
}

h2 {
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.3;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  color: var(--color-text);
  padding-left: 0.75rem;
  border-left: 3px solid var(--color-accent);
}

h3 {
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.4;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
}

p {
  margin-bottom: var(--space-md);
}

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

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

ul, ol {
  margin-bottom: var(--space-md);
  padding-left: 1.5rem;
}

li {
  margin-bottom: var(--space-xs);
}

strong {
  font-weight: 600;
}

em {
  font-style: normal;
  color: var(--color-accent);
  font-weight: 600;
}

/* === Layout === */
.page-wrapper {
  display: flex;
  min-height: 100vh;
}

/* === Sidebar Nav === */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-width);
  height: 100vh;
  overflow-y: auto;
  padding: var(--space-lg) var(--space-md);
  background: var(--color-nav-bg);
  border-right: 1px solid var(--color-border);
  z-index: 100;
}

.nav-brand {
  margin-bottom: var(--space-lg);
  padding: 0 var(--space-sm);
}

.nav-title {
  display: block;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
}

.nav-subtitle {
  display: block;
  font-size: 0.7rem;
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

.nav-links {
  list-style: none;
  padding: 0;
}

.nav-links li {
  margin-bottom: 1px;
}

.nav-links a {
  display: block;
  padding: 0.5rem 0.6rem;
  font-size: 0.8125rem;
  font-weight: 450;
  color: var(--color-nav-text);
  border-radius: var(--radius-sm);
  transition: all 0.15s;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--color-text);
  background: rgba(0, 0, 0, 0.04);
  text-decoration: none;
}

.nav-links a.nav-active {
  color: var(--color-nav-active);
  background: var(--color-accent-light);
  font-weight: 600;
}

/* === Main Content === */
.content {
  margin-left: var(--nav-width);
  flex: 1;
  padding: var(--space-xl) var(--space-xl);
  max-width: calc(var(--max-width) + 2 * var(--space-xl));
}

/* === Callout Boxes === */
.callout {
  margin: var(--space-lg) 0;
  border-radius: var(--radius-md);
  border-left: 3px solid;
  font-size: 0.9375rem;
  overflow: hidden;
}

.callout-philosophy {
  background: var(--color-philosophy-bg);
  border-left-color: var(--color-philosophy-border);
  color: var(--color-philosophy);
  --callout-icon: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path d='M2.866 14.85c-.078.444.36.791.746.593l4.39-2.256 4.389 2.256c.386.198.824-.149.746-.592l-.83-4.73 3.522-3.356c.33-.314.16-.888-.282-.95l-4.898-.696L8.465.792a.513.513 0 0 0-.927 0L5.354 5.12l-4.898.696c-.441.062-.612.636-.283.95l3.523 3.356-.83 4.73zm4.905-2.767-3.686 1.894.694-3.957a.565.565 0 0 0-.163-.505L1.71 6.745l4.052-.576a.525.525 0 0 0 .393-.288L8 2.223l1.847 3.658a.525.525 0 0 0 .393.288l4.052.575-2.906 2.77a.565.565 0 0 0-.163.506l.694 3.957-3.686-1.894a.503.503 0 0 0-.461 0z'/></svg>");
  --callout-header-bg: var(--color-philosophy-header-bg);
}

.callout-warning {
  background: var(--color-warning-bg);
  border-left-color: var(--color-warning-border);
  color: var(--color-warning);
  --callout-icon: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path d='M7.938 2.016A.13.13 0 0 1 8.002 2a.13.13 0 0 1 .063.016.146.146 0 0 1 .054.057l6.857 11.667c.036.06.035.124.002.183a.163.163 0 0 1-.054.06.116.116 0 0 1-.066.017H1.146a.115.115 0 0 1-.066-.017.163.163 0 0 1-.054-.06.176.176 0 0 1 .002-.183L7.884 2.073a.147.147 0 0 1 .054-.057zm1.044-.45a1.13 1.13 0 0 0-1.96 0L.165 13.233c-.457.778.091 1.767.98 1.767h13.713c.889 0 1.438-.99.98-1.767L8.982 1.566z'/><path d='M7.002 12a1 1 0 1 1 2 0 1 1 0 0 1-2 0zM7.1 5.995a.905.905 0 1 1 1.8 0l-.35 3.507a.552.552 0 0 1-1.1 0L7.1 5.995z'/></svg>");
  --callout-header-bg: var(--color-warning-header-bg);
}

.callout-tip {
  background: var(--color-tip-bg);
  border-left-color: var(--color-tip-border);
  color: var(--color-tip);
  --callout-icon: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path d='M2 6a6 6 0 1 1 10.174 4.31c-.203.196-.359.4-.453.619l-.762 1.769A.5.5 0 0 1 10.5 13a.5.5 0 0 1 0 1 .5.5 0 0 1 0 1 1 1 0 0 1-1 1H6.5a1 1 0 0 1-1-1 .5.5 0 0 1 0-1 .5.5 0 0 1 0-1 .5.5 0 0 1-.46-.302l-.761-1.77a1.964 1.964 0 0 0-.453-.618A5.984 5.984 0 0 1 2 6zm6-5a5 5 0 0 0-3.479 8.592c.263.254.514.564.676.941L5.83 12h4.342l.632-1.467c.162-.377.413-.687.676-.941A5 5 0 0 0 8 1zM6 14v.5a.5.5 0 0 0 .5.5h3a.5.5 0 0 0 .5-.5V14H6zm0-1h4v-.5a.5.5 0 0 1 .03-.17l.355-.825H5.615l.355.825A.5.5 0 0 1 6 12.5v.5z'/></svg>");
  --callout-header-bg: var(--color-tip-header-bg);
}

.callout-critical {
  background: var(--color-critical-bg);
  border-left-color: var(--color-critical-border);
  border-left-width: 4px;
  color: var(--color-critical);
  --callout-icon: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path d='M4.54.146A.5.5 0 0 1 4.893 0h6.214a.5.5 0 0 1 .353.146l4.394 4.394a.5.5 0 0 1 .146.353v6.214a.5.5 0 0 1-.146.353l-4.394 4.394a.5.5 0 0 1-.353.146H4.893a.5.5 0 0 1-.353-.146L.146 11.46A.5.5 0 0 1 0 11.107V4.893a.5.5 0 0 1 .146-.353zM5.1 1 1 5.1v5.8L5.1 15h5.8l4.1-4.1V5.1L10.9 1z'/><path d='M7.002 11a1 1 0 1 1 2 0 1 1 0 0 1-2 0zM7.1 4.995a.905.905 0 1 1 1.8 0l-.35 3.507a.552.552 0 0 1-1.1 0z'/></svg>");
  --callout-header-bg: var(--color-critical-header-bg);
}

.callout-critical .callout-label {
  padding-top: 0.7rem;
  padding-bottom: 0.7rem;
  font-size: 0.85rem;
}

.callout-critical .callout-label::before {
  width: 1rem;
  height: 1rem;
}

.callout-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--callout-header-bg);
  padding: 0.55rem var(--space-lg);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.callout-label::before {
  content: "";
  display: inline-block;
  width: 0.85rem;
  height: 0.85rem;
  flex-shrink: 0;
  background-color: currentColor;
  -webkit-mask: var(--callout-icon) center / contain no-repeat;
  mask: var(--callout-icon) center / contain no-repeat;
}

.callout > *:not(.callout-label) {
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
  margin-top: var(--space-md);
}

.callout > *:last-child:not(.callout-label) {
  padding-bottom: var(--space-md);
  margin-bottom: 0;
}

/* === Code Blocks === */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  font-weight: 500;
  background: var(--color-code-bg);
  color: var(--color-code-text);
  padding: 0.125em 0.4em;
  border-radius: 4px;
}

.code-block {
  margin: var(--space-lg) 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.code-header {
  background: var(--color-code-header-bg);
  padding: var(--space-sm) var(--space-md);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--color-border);
}

.code-block pre {
  margin: 0;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-code-block-bg);
  overflow-x: auto;
}

.code-block code {
  background: none;
  padding: 0;
  border: none;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--color-code-block-text);
}

/* === Screenshot Placeholders === */
.screenshot {
  margin: var(--space-lg) 0;
}

.screenshot img {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.screenshot-placeholder {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  padding: 3rem 2rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  min-height: 180px;
  justify-content: center;
}

.screenshot-placeholder .screenshot-label {
  font-weight: 500;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.screenshot-placeholder .screenshot-filename {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  opacity: 0.6;
}

figcaption {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
  text-align: center;
}

/* === Workflow Diagram === */
.workflow-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  margin: var(--space-lg) 0;
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.workflow-step {
  padding: 0.6rem 1.5rem;
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-accent);
  text-align: center;
}

.workflow-step-repeat {
  background: var(--color-surface);
  color: var(--color-text-muted);
  border-color: var(--color-border);
  font-weight: 500;
}

.workflow-arrow {
  color: var(--color-text-muted);
  font-size: 1.2rem;
  line-height: 1;
  padding: 0.25rem 0;
}

/* === Taxonomy Grid === */
.taxonomy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  margin: var(--space-lg) 0;
}

.taxonomy-card {
  padding: 0.75rem 1rem;
  background: var(--color-surface);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  line-height: 1.5;
}

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

@media (max-width: 768px) {
  .taxonomy-grid {
    grid-template-columns: 1fr;
  }
}

/* === Page Navigation (prev/next) === */
.page-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.page-nav a {
  font-size: 0.875rem;
  font-weight: 500;
}

.page-nav .next {
  margin-left: auto;
}

/* === Kicker (small uppercase label above h1) === */
.kicker {
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

/* === Footer === */
.page-footer {
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  opacity: 0.6;
}

.footer-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  border-top: 1px solid var(--color-rule);
  padding: var(--space-md) 0;
  margin-top: var(--space-xl);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
}

/* === Comparison Grid (bad/good prompts) === */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

.comparison-grid .bad,
.comparison-grid .good {
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
}

.comparison-grid .bad {
  background: var(--color-bad-bg);
  border: 1px solid var(--color-bad-border);
}

.comparison-grid .good {
  background: var(--color-good-bg);
  border: 1px solid var(--color-good-border);
}

.comparison-grid .label {
  display: block;
  font-weight: 600;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.comparison-grid .bad .label {
  color: var(--color-bad);
}

.comparison-grid .good .label {
  color: var(--color-good);
}

/* === Hero section for page 1 === */
.hero {
  padding: var(--space-xl) 0;
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

/* === Heading anchor hover (desktop only, decorative) === */
@media (min-width: 769px) {
  h2, h3 {
    position: relative;
  }

  h2:hover::before, h3:hover::before {
    content: "#";
    position: absolute;
    left: -1.5rem;
    color: var(--color-text-muted);
    font-weight: 500;
    opacity: 0.45;
    border-left: none;
    padding-left: 0;
  }
}

/* === Mobile Nav (details/summary) === */
.mobile-nav {
  display: none;
}

/* === Responsive === */
@media (max-width: 768px) {
  .site-nav {
    display: none;
  }

  .mobile-nav {
    display: block;
    position: sticky;
    top: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-sm) var(--space-md);
    z-index: 100;
  }

  .mobile-nav summary {
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    padding: var(--space-sm) 0;
    color: var(--color-text);
  }

  .mobile-nav .nav-links a {
    color: var(--color-nav-text);
    padding: 0.5rem 0;
  }

  .mobile-nav .nav-links a.nav-active {
    color: var(--color-nav-active);
  }

  .content {
    margin-left: 0;
    padding: var(--space-lg) var(--space-md);
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.2rem;
  }

  .comparison-grid {
    grid-template-columns: 1fr;
  }
}

/* === Print === */
@media print {
  .site-nav,
  .mobile-nav,
  .page-nav {
    display: none;
  }

  .page-wrapper {
    display: block;
    max-width: none;
    padding: 0;
  }

  .content {
    margin-left: 0;
    max-width: 100%;
    padding: 0;
  }

  .callout {
    border: 1px solid #ccc;
    background: none !important;
    page-break-inside: avoid;
  }

  h1, h2, h3 {
    page-break-after: avoid;
  }

  .footer-meta {
    border-color: #999;
  }

  body {
    background: white;
    color: black;
  }

  a {
    color: inherit;
    text-decoration: underline;
  }
}