/*
 * The Cheffers Cookbook — shared styles for the tutorial pages.
 *
 * Theming
 * -------
 * The cookbook reuses the playground's palettes verbatim (see
 * docs/editor/editor.css) so both pages feel like one site, and the theme
 * choice is shared through the same "cheffers-theme" localStorage key:
 *
 *   Parchment  (light) — a cookbook page: cream paper, espresso ink, paprika.
 *   Cast Iron  (dark)  — a seasoned skillet: charcoal with an ember-copper glow.
 *   Espresso   (dark)  — a coffee bar: deep roast browns with caramel.
 *
 * Default (no data-theme attribute) follows the machine via
 * prefers-color-scheme; the header toggle sets data-theme to override.
 */

:root {
  --mono: ui-monospace, "SF Mono", "Cascadia Code", "Fira Code", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;

  /* Parchment (light) — also the default when the OS prefers light. */
  color-scheme: light;
  --bg: #efe6d2;
  --panel: #faf4e6;
  --panel-header: #ead9bd;
  --border: #d9c6a3;
  --text: #3a2c23;
  --muted: #8c745b;
  --accent: #c0402b;
  --accent-hover: #a5331f;
  --on-accent: #fff6ec;
  --error: #b22a1e;
  --ok: #5b7d3a;

  --tint: rgba(192, 64, 43, 0.07);
}

/* When the OS prefers dark and the user hasn't chosen, use Cast Iron. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --bg: #181715;
    --panel: #221f1c;
    --panel-header: #2a2723;
    --border: #393530;
    --text: #ece4d6;
    --muted: #9d9081;
    --accent: #e8743b;
    --accent-hover: #f58c54;
    --on-accent: #1b1815;
    --error: #ff6f5e;
    --ok: #93c069;

    --tint: rgba(232, 116, 59, 0.09);
  }
}

/* Explicit Parchment selection (matches :root, restated so the attribute
   always wins over the OS-dark default). */
:root[data-theme="parchment"] {
  color-scheme: light;
  --bg: #efe6d2;
  --panel: #faf4e6;
  --panel-header: #ead9bd;
  --border: #d9c6a3;
  --text: #3a2c23;
  --muted: #8c745b;
  --accent: #c0402b;
  --accent-hover: #a5331f;
  --on-accent: #fff6ec;
  --error: #b22a1e;
  --ok: #5b7d3a;

  --tint: rgba(192, 64, 43, 0.07);
}

/* Explicit Cast Iron selection. */
:root[data-theme="cast-iron"] {
  color-scheme: dark;
  --bg: #181715;
  --panel: #221f1c;
  --panel-header: #2a2723;
  --border: #393530;
  --text: #ece4d6;
  --muted: #9d9081;
  --accent: #e8743b;
  --accent-hover: #f58c54;
  --on-accent: #1b1815;
  --error: #ff6f5e;
  --ok: #93c069;

  --tint: rgba(232, 116, 59, 0.09);
}

/* Espresso (dark) — deep coffee roast with caramel accent. */
:root[data-theme="espresso"] {
  color-scheme: dark;
  --bg: #1f1711;
  --panel: #281e17;
  --panel-header: #312419;
  --border: #443223;
  --text: #f1e6d4;
  --muted: #b09a80;
  --accent: #e0a458;
  --accent-hover: #f1b96b;
  --on-accent: #241a10;
  --error: #ff8068;
  --ok: #b0c06a;

  --tint: rgba(224, 164, 88, 0.09);
}

/*
 * Layout
 * ------
 */

* { box-sizing: border-box; }

html {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.65;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

/* Smooth the palette switch, same as the playground. */
body,
.toolbar,
.footer,
.recipe-card,
.recipe-card-header,
.output-box,
.output-label,
pre,
code,
table,
.callout,
.menu-card,
button.theme-toggle {
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

/* Header toolbar — mirrors the playground's. */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 1rem;
  background: var(--panel-header);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
}
.brand .logo { font-size: 1.4rem; }
.brand .title { letter-spacing: 0.01em; }

.controls { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }

.toolbar-link {
  color: var(--text);
  text-decoration: none;
  font-size: 0.9rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.35rem 0.7rem;
}
.toolbar-link:hover { border-color: var(--accent); color: var(--accent); }

button.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 1.05rem;
  line-height: 1;
  padding: 0.35rem 0.5rem;
  cursor: pointer;
}
button.theme-toggle:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--text) 8%, transparent);
}
button.theme-toggle:active { transform: translateY(1px); }

/* Page column */
.page {
  flex: 1;
  width: 100%;
  max-width: 47rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

/*
 * Typography
 * ----------
 */

h1, h2, h3 {
  font-family: var(--serif);
  line-height: 1.25;
  color: var(--text);
}

h1 { font-size: 2.1rem; margin: 0.4rem 0 0.6rem; }
h2 { font-size: 1.45rem; margin: 2.2rem 0 0.6rem; }
h3 { font-size: 1.15rem; margin: 1.8rem 0 0.5rem; }

p, ul, ol { margin: 0.8rem 0; }
li { margin: 0.25rem 0; }

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

strong { color: var(--text); }
em { color: inherit; }

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

/* Small caps eyebrow above chapter titles: "Course Three". */
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 600;
}

.tagline {
  color: var(--muted);
  font-size: 1.05rem;
  font-family: var(--serif);
  font-style: italic;
  margin-top: 0.2rem;
}

/* Inline code — a little label chip, like writing on masking tape. */
code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--panel-header);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.08em 0.35em;
  white-space: nowrap;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  white-space: inherit;
  font-size: inherit;
}

/*
 * Recipe cards — a framed card with a header bar, holding Chef source.
 * ------------------------------------------------------------------
 */

.recipe-card {
  margin: 1.4rem 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  overflow: hidden;
}

.recipe-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  flex-wrap: wrap;
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  background: var(--panel-header);
  border-bottom: 1px solid var(--border);
}

.recipe-card-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-transform: none;
  letter-spacing: 0;
}

.recipe-card-actions a {
  font-size: 0.8rem;
  text-decoration: none;
}
.recipe-card-actions a:hover { text-decoration: underline; }

button.copy-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text);
  font: inherit;
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  cursor: pointer;
}
button.copy-btn:hover { border-color: var(--accent); color: var(--accent); }

.recipe-card pre {
  margin: 0;
  padding: 0.9rem 1rem;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

/* Generic code block (snippets that are not full recipes). */
pre.snippet {
  margin: 1rem 0;
  padding: 0.8rem 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

/* Output boxes — styled after the playground's output pane. */
.output-box {
  margin: 1rem 0 1.4rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  overflow: hidden;
}

.output-label {
  padding: 0.3rem 0.8rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  background: var(--panel-header);
  border-bottom: 1px solid var(--border);
}

.output-box pre {
  margin: 0;
  padding: 0.7rem 1rem;
  font-family: var(--mono);
  font-size: 14px;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Input boxes (what to type into the playground's Input panel). */
.output-box.input-box .output-label { color: var(--ok); }

/*
 * Callouts
 * --------
 */

.callout {
  margin: 1.2rem 0;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  background: var(--tint);
}
.callout > :first-child { margin-top: 0; }
.callout > :last-child { margin-bottom: 0; }

.callout .callout-title {
  display: block;
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

/* "Try it" experiments get the ok-green treatment. */
.callout.try { border-left-color: var(--ok); }
.callout.try .callout-title { color: var(--ok); }

/*
 * Tables — ingredient walkthroughs, instruction reference.
 * -------------------------------------------------------
 */

.table-scroll { overflow-x: auto; margin: 1rem 0; }

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.92rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
}

th, td {
  text-align: left;
  padding: 0.45rem 0.7rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th {
  background: var(--panel-header);
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}

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

td code { white-space: normal; }

/*
 * Stack diagrams — a mixing bowl drawn as a pile of plates.
 * --------------------------------------------------------
 */

.bowls {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  align-items: flex-end;
  margin: 1.2rem 0;
}

.bowl { text-align: center; }

.stack {
  display: flex;
  flex-direction: column;
  gap: 3px;
  justify-content: flex-end;
  min-height: 2rem;
  padding: 0.5rem 0.6rem;
  border: 2px solid var(--border);
  border-top: none;
  border-radius: 0 0 1.6rem 1.6rem;
  background: var(--panel);
  min-width: 7rem;
}

.stack .item {
  font-family: var(--mono);
  font-size: 0.85rem;
  background: var(--panel-header);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.1rem 0.6rem;
}

.stack .item.top {
  background: var(--tint);
  border-color: var(--accent);
}

.bowl .bowl-label {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 0.35rem;
}

/*
 * Index page menu
 * ---------------
 */

.menu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(19rem, 1fr));
  gap: 0.9rem;
  margin: 1.4rem 0;
}

.menu-card {
  display: block;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  padding: 0.9rem 1rem;
  text-decoration: none;
  color: var(--text);
}
.menu-card:hover { border-color: var(--accent); }

.menu-card .course {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.menu-card .dish {
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0.15rem 0;
  color: var(--accent);
}

.menu-card .teaches {
  font-size: 0.88rem;
  color: var(--muted);
}

/* The kitchen-to-code translation table on the index. */
.translation em { color: var(--muted); }

/*
 * Chapter navigation
 * ------------------
 */

.chapter-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--border);
  font-size: 0.95rem;
}

.chapter-nav a { text-decoration: none; }
.chapter-nav a:hover { text-decoration: underline; }
.chapter-nav .nav-next { text-align: right; margin-left: auto; }
.chapter-nav .nav-label {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* Footer — mirrors the playground's. */
.footer {
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  color: var(--muted);
  background: var(--panel-header);
  border-top: 1px solid var(--border);
}
.footer a { color: var(--accent); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

@media (max-width: 540px) {
  h1 { font-size: 1.7rem; }
  .page { padding: 1.4rem 1rem 2.5rem; }
  .bowls { gap: 1rem; }
}