@font-face { font-family: "Space Grotesk"; src: local("Space Grotesk"); font-display: swap; }
@font-face { font-family: "Archivo"; src: local("Archivo"); font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: local("JetBrains Mono"); font-display: swap; }

:root {
  --paper: #f6f7f4;
  --surface: #ffffff;
  --ink: #12151a;
  --muted: #5b6470;
  --line: #e3e6e2;
  --accent: #d21f5b;
  --accent-ink: #ffffff;
  --deep: #12151a;
  --deep-ink: #eef0ec;
  --display: "Space Grotesk", "Arial Narrow", system-ui, sans-serif;
  --body: "Archivo", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --measure: 68ch;
  --radius: 3px;
  --wrap: 78rem;
}

body.roast { --accent: #d99e00; --accent-ink: #12151a; }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: clamp(1rem, 0.96rem + 0.25vw, 1.125rem);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--ink); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent); }
a:focus-visible, summary:focus-visible, button:focus-visible {
  outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 2px;
}

/* Header */
.site-header {
  display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between;
  max-width: var(--wrap); margin: 0 auto; padding: 1.1rem 1.5rem;
  border-bottom: 1px solid var(--line);
}
.site-header .mark {
  font-family: var(--display); font-weight: 700; font-size: 1.25rem;
  letter-spacing: -0.02em; text-decoration: none; color: var(--ink);
}
.site-header .mark em { font-style: normal; color: var(--accent); }
.site-header nav { display: flex; gap: 1.3rem; }
.site-header nav a {
  font-family: var(--mono); font-size: 0.74rem; text-transform: uppercase;
  letter-spacing: 0.1em; text-decoration: none; color: var(--muted);
}
.site-header nav a:hover { color: var(--accent); }

main { max-width: var(--wrap); margin: 0 auto; padding: 1.5rem 1.5rem 5rem; }

/* Breadcrumbs */
.breadcrumbs { font-family: var(--mono); font-size: 0.72rem; color: var(--muted); padding: 0.6rem 0 0.4rem; }
.breadcrumbs a { color: var(--muted); text-decoration: none; }
.breadcrumbs a:hover { color: var(--accent); }
.breadcrumbs span[aria-current] { color: var(--ink); }

/* Hero */
.hero {
  display: grid; grid-template-columns: 1fr; gap: 2rem;
  padding: 2.5rem 0 3rem; border-bottom: 1px solid var(--line);
  align-items: center;
}
@media (min-width: 880px) { .hero { grid-template-columns: 1.08fr 0.92fr; } }
.kicker {
  font-family: var(--mono); font-size: 0.74rem; text-transform: uppercase;
  letter-spacing: 0.14em; color: var(--accent); margin: 0 0 1rem;
  display: flex; align-items: center; gap: 0.6rem;
}
.kicker::before { content: ""; width: 2rem; height: 2px; background: var(--accent); display: inline-block; }
.hero h1 {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(2.3rem, 1.6rem + 4.2vw, 4.2rem);
  line-height: 1.02; letter-spacing: -0.035em; margin: 0 0 1.1rem;
  text-wrap: balance;
}
.hero .lede { color: var(--muted); max-width: 48ch; font-size: 1.12em; margin: 0; }
.byline { font-family: var(--mono); font-size: 0.74rem; color: var(--muted); margin: 1.4rem 0 0; }
.byline span { color: var(--ink); }
.hero-media { margin: 0; }
.hero-media img { width: 100%; border: 1px solid var(--line); border-radius: var(--radius); }
.hero-media figcaption, .inline-figure figcaption {
  font-family: var(--mono); font-size: 0.72rem; color: var(--muted); margin-top: 0.5rem;
}
.hero-plain { border-bottom: 1px solid var(--line); }

/* TOC */
.toc { border-bottom: 1px solid var(--line); padding: 1.6rem 0; }
.toc h2 { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--muted); margin: 0 0 0.9rem; }
.toc ol { columns: 2; column-gap: 2.5rem; margin: 0; padding-left: 1.1rem; }
@media (max-width: 640px) { .toc ol { columns: 1; } }
.toc li { margin: 0.25rem 0; break-inside: avoid; }
.toc a { text-decoration: none; color: var(--muted); }
.toc a:hover { color: var(--accent); }

/* Sections */
.block { padding: 2.4rem 0; border-bottom: 1px solid var(--line); }
.block h2 {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(1.5rem, 1.2rem + 1.4vw, 2.15rem);
  letter-spacing: -0.02em; margin: 0 0 1rem; text-wrap: balance;
}
.block h3 { font-family: var(--display); font-size: 1.25rem; margin: 1.6rem 0 0.5rem; }
.block p { max-width: var(--measure); margin: 0.8rem 0; }
.block ul, .block ol { max-width: var(--measure); padding-left: 1.25rem; margin: 0.8rem 0; }
.block li { margin: 0.4rem 0; }
.block li::marker { color: var(--accent); }

.steps { counter-reset: step; list-style: none; padding-left: 0; }
.steps li { counter-increment: step; position: relative; padding-left: 3rem; margin: 1rem 0; }
.steps li::before {
  content: counter(step, decimal-leading-zero); position: absolute; left: 0; top: 0.05em;
  font-family: var(--mono); font-size: 0.8rem; color: var(--accent); font-weight: 700;
}

/* Note callout */
.note {
  margin: 1.4rem 0; padding: 1rem 1.25rem; max-width: var(--measure);
  background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--accent);
  border-radius: var(--radius); font-size: 0.98em; color: var(--ink);
}

/* Tables */
.table-wrap { overflow-x: auto; margin: 1.4rem 0; max-width: 100%; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { text-align: left; padding: 0.7rem 0.9rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); background: #f0f2ee; }
tr:last-child td { border-bottom: none; }

/* Inline figures */
.inline-figure { margin: 2.2rem 0; }
.inline-figure img { border: 1px solid var(--line); border-radius: var(--radius); width: 100%; }
.inline-figure.figure-flip figcaption { text-align: right; }

/* FAQ */
.faq { padding: 2.4rem 0; border-bottom: 1px solid var(--line); }
.faq h2 { font-family: var(--display); font-size: clamp(1.5rem, 1.2rem + 1.4vw, 2.15rem); letter-spacing: -0.02em; margin: 0 0 1.2rem; }
.faq details { border-bottom: 1px solid var(--line); padding: 1rem 0; }
.faq summary { cursor: pointer; font-weight: 600; font-family: var(--display); letter-spacing: -0.01em; }
.faq summary:hover { color: var(--accent); }
.faq summary::marker { color: var(--accent); }
.faq p { max-width: var(--measure); color: var(--muted); margin: 0.6rem 0 0; }

/* Author box */
.author-box {
  margin: 2.4rem 0; padding: 1.3rem 1.5rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  display: flex; gap: 1rem; align-items: flex-start;
}
.author-box::before { content: "M"; font-family: var(--display); font-weight: 700; color: var(--accent); font-size: 1.3rem; line-height: 1; }
.author-box p { margin: 0; color: var(--muted); font-size: 0.92rem; }
.author-box strong { color: var(--ink); }

/* Cross links */
.crosslinks { padding: 2.4rem 0 0.4rem; }
.crosslinks h2 { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--muted); margin: 0 0 1rem; }
.crosslinks { display: grid; grid-template-columns: 1fr; gap: 0.7rem; }
@media (min-width: 640px) { .crosslinks { grid-template-columns: 1fr 1fr; } .crosslinks h2 { grid-column: 1 / -1; } }
.crosslinks a {
  font-family: var(--display); font-weight: 600; text-decoration: none;
  padding: 0.85rem 1rem; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); transition: border-color 0.15s ease, color 0.15s ease;
}
.crosslinks a:hover { border-color: var(--accent); color: var(--accent); }

/* Footer */
.site-footer {
  background: var(--deep); color: var(--deep-ink);
  margin-top: 2rem;
}
.site-footer .inner {
  max-width: var(--wrap); margin: 0 auto; padding: 2.5rem 1.5rem 3rem;
  display: grid; gap: 1.5rem;
}
@media (min-width: 720px) { .site-footer .inner { grid-template-columns: 2fr 1fr; } }
.site-footer .brand { font-family: var(--display); font-weight: 700; font-size: 1.2rem; letter-spacing: -0.02em; }
.site-footer .brand em { font-style: normal; color: var(--accent); }
.site-footer p { color: #9aa1ab; font-size: 0.85rem; margin: 0.4rem 0; max-width: 60ch; }
.site-footer a { color: var(--deep-ink); }

/* CTA */
.cta {
  display: inline-block; margin-top: 1.1rem; background: var(--accent); color: var(--accent-ink);
  padding: 0.75rem 1.2rem; border-radius: var(--radius); text-decoration: none;
  font-family: var(--mono); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; font-weight: 600;
}
.cta:hover { color: var(--accent-ink); filter: brightness(1.05); }
.cta:active { transform: translateY(1px); }

@media (prefers-reduced-motion: no-preference) {
  .hero > * { animation: rise 0.55s cubic-bezier(0.16, 1, 0.3, 1) both; }
  .hero > *:nth-child(2) { animation-delay: 0.08s; }
  @keyframes rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
}