/*
 * Cheffers — shared site styles for the playground (docs/editor/) and the
 * cookbook (docs/cookbook/). Page-specific layout lives next to each page;
 * this file owns everything the two share: fonts, color tokens, the header,
 * footer, buttons, switches, and the Chef syntax / ANSI color classes.
 *
 * Type
 * ----
 *   Archivo        display (headings, wordmark) — self-hosted, OFL
 *   IBM Plex Mono  code, recipe source, labels  — self-hosted, OFL
 *   system-ui      body copy — the most legible face on every platform
 *
 * Theming
 * -------
 * All colors are semantic custom properties so the three palettes — and the
 * OS default — share one vocabulary. Palettes lean on the kitchen:
 *
 *   Parchment  (light) — a cookbook page: warm paper, espresso ink, paprika.
 *   Cast Iron  (dark)  — a seasoned skillet: charcoal with an ember glow.
 *   Espresso   (dark)  — a coffee bar: deep roast browns with caramel.
 *
 * Every text color clears WCAG AA (4.5:1) against --bg, --surface and
 * --surface-2 in its palette. Default (no data-theme attribute) follows the
 * machine via prefers-color-scheme; the header toggle (theme.js) sets
 * data-theme to override, stored under the "cheffers-theme" key.
 */

@font-face {
  font-family: "Archivo";
  src: url("./fonts/archivo-latin-wght-normal.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
    U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215,
    U+FEFF, U+FFFD;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("./fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
    U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215,
    U+FEFF, U+FFFD;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("./fonts/ibm-plex-mono-latin-600-normal.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
    U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215,
    U+FEFF, U+FFFD;
}

:root {
  --font-display: "Archivo", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;

  --radius-sm: 7px;
  --radius: 10px;
  --radius-lg: 14px;
  --header-h: 3.5rem;
  --gutter: clamp(1rem, 3vw, 1.5rem);
}

/* Parchment (light) — also the default when the OS prefers light. */
:root,
:root[data-theme="parchment"] {
  color-scheme: light;
  --bg: #f6f1e7;
  --surface: #fffdf8;
  --surface-2: #efe7d8;
  --border: #e3d7c3;
  --border-strong: #cdbb9c;
  --text: #2a1f18;
  --muted: #6b5948;
  --accent: #b93a25;
  --accent-hover: #9c2f1c;
  --on-accent: #ffffff;
  --accent-soft: rgb(185 58 37 / 0.07);
  --ok: #3d7428;
  --ok-soft: rgb(61 116 40 / 0.1);
  --error: #b3261e;
  --error-soft: rgb(179 38 30 / 0.08);
  --shadow: 0 1px 2px rgb(60 40 20 / 0.04), 0 6px 20px -8px rgb(60 40 20 / 0.12);
  --knob: #ffffff;

  --syn-section: #b93a25;
  --syn-verb: #b93a25;
  --syn-number: #1d6a85;
  --syn-bowl: #4a7329;
  --syn-comment: #76644f;

  --ansi-red: #b3261e;
  --ansi-green: #276b31;
  --ansi-yellow: #8a5a00;
  --ansi-blue: #2453c4;
  --ansi-magenta: #8b3aa8;
  --ansi-cyan: #0b6f7a;
}

/* When the OS prefers dark and the reader hasn't chosen, use Cast Iron. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --bg: #151311;
    --surface: #1d1a17;
    --surface-2: #26221e;
    --border: #332e29;
    --border-strong: #4a433c;
    --text: #efe7da;
    --muted: #a89a8c;
    --accent: #ec7a43;
    --accent-hover: #f59262;
    --on-accent: #1a1410;
    --accent-soft: rgb(236 122 67 / 0.08);
    --ok: #95c46c;
    --ok-soft: rgb(149 196 108 / 0.1);
    --error: #ff7b6b;
    --error-soft: rgb(255 123 107 / 0.09);
    --shadow: 0 1px 2px rgb(0 0 0 / 0.3), 0 8px 24px -10px rgb(0 0 0 / 0.5);
    --knob: #f4ede2;

    --syn-section: #f08a55;
    --syn-verb: #f08a55;
    --syn-number: #7cc7e8;
    --syn-bowl: #a8cf7f;
    --syn-comment: #968878;

    --ansi-red: #ff7b72;
    --ansi-green: #7ee2a8;
    --ansi-yellow: #f2cc60;
    --ansi-blue: #79b8ff;
    --ansi-magenta: #d2a8ff;
    --ansi-cyan: #76e3ea;
  }
}

/* Explicit Cast Iron selection (same values as the OS-dark default). */
:root[data-theme="cast-iron"] {
  color-scheme: dark;
  --bg: #151311;
  --surface: #1d1a17;
  --surface-2: #26221e;
  --border: #332e29;
  --border-strong: #4a433c;
  --text: #efe7da;
  --muted: #a89a8c;
  --accent: #ec7a43;
  --accent-hover: #f59262;
  --on-accent: #1a1410;
  --accent-soft: rgb(236 122 67 / 0.08);
  --ok: #95c46c;
  --ok-soft: rgb(149 196 108 / 0.1);
  --error: #ff7b6b;
  --error-soft: rgb(255 123 107 / 0.09);
  --shadow: 0 1px 2px rgb(0 0 0 / 0.3), 0 8px 24px -10px rgb(0 0 0 / 0.5);
  --knob: #f4ede2;

  --syn-section: #f08a55;
  --syn-verb: #f08a55;
  --syn-number: #7cc7e8;
  --syn-bowl: #a8cf7f;
  --syn-comment: #968878;

  --ansi-red: #ff7b72;
  --ansi-green: #7ee2a8;
  --ansi-yellow: #f2cc60;
  --ansi-blue: #79b8ff;
  --ansi-magenta: #d2a8ff;
  --ansi-cyan: #76e3ea;
}

/* Espresso (dark) — deep coffee roast with a caramel accent. */
:root[data-theme="espresso"] {
  color-scheme: dark;
  --bg: #1b130e;
  --surface: #241a14;
  --surface-2: #2e221a;
  --border: #3f3026;
  --border-strong: #5a4536;
  --text: #f4e9d8;
  --muted: #bca58c;
  --accent: #e6a95e;
  --accent-hover: #f2bd78;
  --on-accent: #23180f;
  --accent-soft: rgb(230 169 94 / 0.08);
  --ok: #b9c86e;
  --ok-soft: rgb(185 200 110 / 0.1);
  --error: #ff8a70;
  --error-soft: rgb(255 138 112 / 0.09);
  --shadow: 0 1px 2px rgb(0 0 0 / 0.3), 0 8px 24px -10px rgb(0 0 0 / 0.5);
  --knob: #f7eddd;

  --syn-section: #eab06a;
  --syn-verb: #eab06a;
  --syn-number: #8fcfe0;
  --syn-bowl: #c3cf7c;
  --syn-comment: #a48d76;

  --ansi-red: #ff8a7a;
  --ansi-green: #8fdcab;
  --ansi-yellow: #f2cc60;
  --ansi-blue: #8cc0ff;
  --ansi-magenta: #dcb4ff;
  --ansi-cyan: #86e0e6;
}

/*
 * Base
 * ----
 */

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

html {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

/* Smooth the palette switch (CodeMirror repaints itself). */
body,
.site-header,
.site-footer,
.btn,
.icon-btn {
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

::selection { background: color-mix(in srgb, var(--accent) 24%, transparent); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/*
 * Header — wordmark, section switcher, GitHub + theme buttons.
 * ------------------------------------------------------------
 */

.site-header {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2.5vw, 1.5rem);
  height: var(--header-h);
  padding: 0 var(--gutter);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.wordmark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.035em;
  line-height: 1;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}
.wordmark .dot { color: var(--accent); }

/* Segmented switcher between the two halves of the site. */
.site-nav {
  display: flex;
  gap: 2px;
  padding: 3px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
}
.site-nav a {
  padding: 0.3rem 0.85rem;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.4;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.15s ease, color 0.15s ease;
}
.site-nav a:hover { color: var(--text); }
.site-nav a[aria-current]:not([aria-current="false"]) {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 1px 2px rgb(0 0 0 / 0.08);
}

.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.icon-btn:hover {
  color: var(--text);
  background: var(--surface-2);
}
.icon-btn svg {
  width: 1.125rem;
  height: 1.125rem;
}

@media (max-width: 30rem) {
  .header-actions .github-link { display: none; }
  .site-nav a { padding: 0.3rem 0.7rem; }
}

/*
 * Footer
 * ------
 */

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.35rem 1.5rem;
  padding: 1rem var(--gutter);
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--muted);
  border-top: 1px solid var(--border);
}
.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.1rem;
}
.site-footer a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--border-strong);
  text-underline-offset: 3px;
}
.site-footer a:hover {
  color: var(--text);
  text-decoration-color: currentColor;
}

/*
 * Buttons & form controls
 * -----------------------
 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  height: 2rem;
  padding: 0 0.75rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font: 500 0.8125rem/1 var(--font-sans);
  white-space: nowrap;
  text-decoration: none;
  cursor: pointer;
}
.btn:hover { background: var(--surface-2); }
.btn:active { transform: translateY(1px); }

.btn-primary {
  border-color: transparent;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
}
.btn-primary:hover { background: var(--accent-hover); }

/* Accent-tinted secondary action ("Open in playground"). */
.btn-soft {
  border-color: transparent;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}
.btn-soft:hover {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent);
}

/* Keyboard hint inside a button, e.g. Run ⌘↵. */
.btn kbd {
  font: 500 0.6875rem/1 var(--font-mono);
  padding: 0.2rem 0.3rem;
  border-radius: 4px;
  background: color-mix(in srgb, currentColor 16%, transparent);
}

/* Icons drawn with CSS masks so they inherit currentColor in every theme. */
.icon {
  display: inline-block;
  flex: none;
  width: 0.875rem;
  height: 0.875rem;
  background: currentColor;
  -webkit-mask: var(--icon) no-repeat center / contain;
  mask: var(--icon) no-repeat center / contain;
}
.icon-play { --icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M7 4.5v15a1 1 0 0 0 1.5.86l12.5-7.5a1 1 0 0 0 0-1.72L8.5 3.64A1 1 0 0 0 7 4.5z'/%3E%3C/svg%3E"); }
.icon-arrow { --icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.25' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12h14M13 6l6 6-6 6'/%3E%3C/svg%3E"); }
.icon-copy { --icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='8' y='8' width='13' height='13' rx='2.5'/%3E%3Cpath d='M16 8V5.5A2.5 2.5 0 0 0 13.5 3h-8A2.5 2.5 0 0 0 3 5.5v8A2.5 2.5 0 0 0 5.5 16H8'/%3E%3C/svg%3E"); }
.icon-check { --icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 12.5l5 5L20 6.5'/%3E%3C/svg%3E"); }

/* iOS-style switch built on a real checkbox (keyboard + screen-reader
   friendly, and still .checked to scripts). */
.switch {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
.switch:hover { color: var(--text); }
.switch input {
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  flex: none;
  width: 1.875rem;
  height: 1.125rem;
  margin: 0;
  border-radius: 999px;
  background: var(--border-strong);
  cursor: pointer;
  transition: background-color 0.15s ease;
}
.switch input::before {
  content: "";
  position: absolute;
  top: 0.1875rem;
  left: 0.1875rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: var(--knob);
  box-shadow: 0 1px 2px rgb(0 0 0 / 0.3);
  transition: transform 0.15s ease;
}
.switch input:checked { background: var(--accent); }
.switch input:checked::before { transform: translateX(0.75rem); }
.switch input:focus-visible { outline-offset: 3px; border-radius: 999px; }

/*
 * Chef syntax colors — the token classes emitted by chef-syntax.js, shared
 * by the playground editor and the cookbook's recipe cards.
 * ---------------------------------------------------------------
 */

.tok-title { color: var(--text); font-weight: 600; }
.tok-section { color: var(--syn-section); font-weight: 600; }
.tok-verb { color: var(--syn-verb); }
.tok-number { color: var(--syn-number); }
.tok-bowl { color: var(--syn-bowl); }
.tok-unit,
.tok-meta,
.tok-comment { color: var(--syn-comment); }

/*
 * Interpreter diagnostics — ANSI colors mapped per palette (ansi.js emits
 * these classes), so error text stays legible on light and dark alike.
 * ------------------------------------------------------------------
 */

.ansi-bold { font-weight: 600; }
.ansi-red { color: var(--ansi-red); }
.ansi-green { color: var(--ansi-green); }
.ansi-yellow { color: var(--ansi-yellow); }
.ansi-blue { color: var(--ansi-blue); }
.ansi-magenta { color: var(--ansi-magenta); }
.ansi-cyan { color: var(--ansi-cyan); }
.ansi-white { color: var(--text); }

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}