/* The Hermes Cookbook — hand-rolled book styles. No frameworks, no build step. */

:root {
  --paper: #fbf8f2;
  --paper-raised: #f4eee2;
  --ink: #23201a;
  --ink-soft: #4c463b;
  --muted: #837766;
  --line: #e4dac6;
  --accent: #96540f;
  --accent-deep: #7a420a;
  --accent-soft: #f2e2c5;
  --warn: #8c2f1b;
  --warn-soft: #f5ddd4;
  --code-bg: #221e19;
  --code-ink: #ece3d1;
  --code-dim: #a89a80;
  --code-accent: #e2a759;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

[data-theme="dark"] {
  --paper: #17140f;
  --paper-raised: #1f1b15;
  --ink: #e9e1d0;
  --ink-soft: #c9bda6;
  --muted: #94876f;
  --line: #372f24;
  --accent: #e0a355;
  --accent-deep: #eebd77;
  --accent-soft: #33270f;
  --warn: #e08a6d;
  --warn-soft: #3a1e15;
  --code-bg: #100d0a;
  --code-ink: #e8ddc7;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden; /* belt-and-braces: nothing may push the page wide */
}

/* ---------- top bar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  flex-wrap: wrap; /* narrow screens: controls wrap instead of overflowing */
  align-items: center;
  gap: 8px 14px;
  padding: 10px 22px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  font-family: var(--sans);
}

.wordmark {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}
.wordmark em { color: var(--accent); font-style: normal; }

.topbar .crumb {
  color: var(--muted);
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0; /* flex children refuse to shrink below content width without this */
}

.topbar input#q {
  width: 170px;
  padding: 6px 10px;
  font: 13px var(--sans);
  color: var(--ink);
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: 6px;
  outline: none;
}
.topbar input#q:focus { border-color: var(--accent); }

.topbar a.gh, .topbar button#theme {
  font: 13px var(--sans);
  color: var(--ink-soft);
  background: none;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 5px 11px;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}
.topbar a.gh:hover, .topbar button#theme:hover { border-color: var(--accent); color: var(--accent); }

#menuToggle { display: none; }

/* ---------- layout ---------- */

.shell {
  display: grid;
  grid-template-columns: 264px minmax(0, 1fr);
  max-width: 1180px;
  margin: 0 auto;
}

nav.toc {
  position: sticky;
  top: 53px;
  align-self: start;
  height: calc(100vh - 53px);
  overflow-y: auto;
  padding: 26px 18px 60px 26px;
  border-right: 1px solid var(--line);
  font-family: var(--sans);
}

nav.toc .toc-head {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin: 0 0 10px;
}

nav.toc ol { list-style: none; margin: 0; padding: 0; }

/* The "Start here" entry is a section of its own, not chapter zero. */
nav.toc li.nav-home a {
  display: block;
  padding: 7px 10px;
  margin-bottom: 10px;
  color: var(--accent-deep);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
}
nav.toc li.nav-home a:hover { color: var(--accent); background: none; }

nav.toc li a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 7px 10px;
  margin: 1px 0;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.35;
  border-radius: 6px;
  border-left: 2px solid transparent;
}
nav.toc li a .n {
  color: var(--muted);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
  min-width: 17px;
  text-align: right;
}
nav.toc li a:hover { color: var(--accent); background: var(--paper-raised); }
nav.toc li a.active {
  color: var(--accent-deep);
  background: var(--accent-soft);
  border-left-color: var(--accent);
  font-weight: 600;
}
nav.toc li a.active .n { color: var(--accent); }
nav.toc li.hidden { display: none; }

nav.toc .toc-foot {
  margin-top: 26px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
}
nav.toc .toc-foot a { color: var(--muted); }

/* ---------- article ---------- */

main {
  min-width: 0;
  padding: 44px 52px 90px;
}

article { max-width: 700px; }

.kicker {
  font: 700 12px var(--sans);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin: 0 0 6px;
}

h1 {
  font-size: 38px;
  line-height: 1.15;
  margin: 0 0 18px;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 25px;
  line-height: 1.25;
  margin: 52px 0 14px;
  padding-top: 10px;
}

h3 {
  font: 700 17px var(--sans);
  margin: 34px 0 8px;
  color: var(--ink);
}

p { margin: 0 0 18px; }

.lede {
  font-size: 21px;
  line-height: 1.6;
  color: var(--ink-soft);
  margin-bottom: 28px;
}

a { color: var(--accent-deep); text-decoration-color: var(--accent-soft); text-underline-offset: 2px; }
a:hover { color: var(--accent); }

code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 5px;
}

pre {
  position: relative;
  background: var(--code-bg);
  border-radius: 10px;
  padding: 18px 20px;
  margin: 22px 0 26px;
  overflow-x: auto;
  max-width: 100%;
  font-size: 14px;
  line-height: 1.62;
}

pre code {
  display: block;
  background: none;
  border: none;
  padding: 0;
  color: var(--code-ink);
  font-size: inherit;
}

pre .file-tab {
  position: absolute;
  top: 0;
  right: 0;
  font: 11px var(--sans);
  color: var(--code-dim);
  background: rgba(255,255,255,0.05);
  padding: 4px 12px;
  border-radius: 0 10px 0 8px;
  letter-spacing: 0.04em;
}

pre .copy {
  position: absolute;
  top: 6px;
  right: 6px;
  font: 11px var(--sans);
  color: var(--code-dim);
  background: rgba(255,255,255,0.06);
  border: none;
  border-radius: 6px;
  padding: 4px 9px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s;
}
pre:hover .copy { opacity: 1; }
pre .copy:hover { color: var(--code-accent); }
pre.has-tab .copy { right: auto; left: 8px; top: auto; bottom: 8px; }

ul, ol { padding-left: 24px; margin: 0 0 18px; }
li { margin-bottom: 7px; }
li > code { font-size: 0.84em; }

.note, .warn {
  margin: 24px 0;
  padding: 14px 18px;
  border-radius: 8px;
  font-size: 16.5px;
  border: 1px solid var(--line);
}
.note { background: var(--accent-soft); border-left: 3px solid var(--accent); }
.warn { background: var(--warn-soft); border-left: 3px solid var(--warn); }
.note p:last-child, .warn p:last-child { margin-bottom: 0; }
.note .tag, .warn .tag {
  display: block;
  font: 700 11px var(--sans);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 5px;
}
.note .tag { color: var(--accent-deep); }
.warn .tag { color: var(--warn); }

table {
  width: 100%;
  border-collapse: collapse;
  font: 14.5px var(--sans);
  margin: 22px 0 28px;
}
th {
  text-align: left;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  border-bottom: 2px solid var(--line);
  padding: 8px 10px;
}
td { border-bottom: 1px solid var(--line); padding: 9px 10px; vertical-align: top; }
td code { font-size: 12.5px; }

hr { border: none; border-top: 1px solid var(--line); margin: 48px 0; }

/* ---------- prev / next ---------- */

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 64px;
  font-family: var(--sans);
}
.pager a {
  display: block;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 18px;
  text-decoration: none;
  color: var(--ink-soft);
  background: var(--paper-raised);
}
.pager a:hover { border-color: var(--accent); }
.pager a .dir { display: block; font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); margin-bottom: 3px; }
.pager a .t { font-weight: 600; font-size: 15px; color: var(--ink); }
.pager a.next { text-align: right; }
.pager a span.spacer { visibility: hidden; }

.colophon {
  margin-top: 56px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font: 13px var(--sans);
  color: var(--muted);
}

/* ---------- landing ---------- */

.hero { padding: 20px 0 8px; }
.hero h1 { font-size: 46px; margin-bottom: 10px; }
.hero .lede { max-width: 620px; }

.chapters { margin-top: 30px; }
.chapters a.ch {
  display: block;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: var(--ink);
}
.chapters a.ch:hover { background: var(--paper-raised); }
.chapters a.ch .num {
  font: 700 13px var(--sans);
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  margin-right: 14px;
}
.chapters a.ch .name { font-size: 19px; font-weight: 600; }
.chapters a.ch .blurb {
  display: block;
  font: 14.5px var(--sans);
  color: var(--muted);
  margin: 3px 0 0 34px;
}

/* ---------- responsive ---------- */

@media (max-width: 920px) {
  .shell { grid-template-columns: 1fr; }
  nav.toc {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: min(78vw, 300px);
    background: var(--paper);
    z-index: 40;
    transform: translateX(-105%);
    transition: transform 0.2s;
    border-right: 1px solid var(--line);
    height: auto;
    padding: 18px;
    box-shadow: 12px 0 32px rgba(0,0,0,0.18);
  }
  nav.toc.open { transform: none; }
  #menuToggle { display: inline-block; }
  main { padding: 30px 22px 70px; }
  h1 { font-size: 30px; }
  .hero h1 { font-size: 34px; }
  .topbar { padding: 9px 14px; gap: 8px 10px; }
  .topbar .crumb { display: none; } /* wordmark says enough on a phone */
  .topbar input#q { display: none; }
  pre { font-size: 13px; padding: 14px 16px; }
  body { font-size: 17px; }
}