/* folio — shared styles. Light and dark themes follow the OS setting. */

/* Self-hosted so box-drawing characters come from the same font as the text;
   the Google Fonts build of JetBrains Mono leaves them out, which misaligns
   terminal borders. Licensed under the SIL OFL (fonts/OFL.txt). */
@font-face {
  font-family: "JetBrains Mono";
  src: url("fonts/JetBrainsMono-Regular.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("fonts/JetBrainsMono-Bold.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}

:root {
  /* Cool paper and slate ink; harbor teal for links; amber marks offsets and releases. */
  --fog: #f2f4f1;
  --paper: #fbfcfa;
  --slate: #13212b;
  --muted: #586873;
  --rule: #d3dad6;
  --harbor: #0b6f78;
  --signal: #e3a21a;
  --deep: #0f1a24;
  --deep-2: #152431;
  --on-deep: #d9e3ea;
  --on-deep-muted: #8d9fae;
  --focus: #0b6f78;

  /* Terminal palette, used by the kaffy renders in both themes. */
  --t-bg: #0f1a24;
  --t-fg: #d5dee6;
  --t-cyan: #4fc8d0;
  --t-green: #7fcf7a;
  --t-yellow: #e8b84a;
  --t-red: #ef6f6c;
  --t-magenta: #c792ea;
  --t-blue: #6fa8ff;
  --t-black: #0f1a24;
  --t-white: #d5dee6;

  --sans: "Archivo", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --measure: 66ch;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fog: #0c141b;
    --paper: #111c25;
    --slate: #dce4e8;
    --muted: #8fa0ab;
    --rule: #22313c;
    --harbor: #4fc8d0;
    --focus: #4fc8d0;
    --deep: #0f1a24;
    --deep-2: #152431;
    --t-bg: #0b141b;
  }
  /* Dark bands sit on a dark page: a hairline keeps their edge. */
  .command { box-shadow: 0 0 0 1px #22313c; }
  .band { border-block: 1px solid #1c2a35; }
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--fog);
  color: var(--slate);
  font: 400 1.0625rem/1.6 var(--sans);
  font-stretch: 100%;
}

a { color: var(--harbor); text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: 2px; }

code, pre, kbd { font-family: var(--mono); font-size: 0.875em; }

.wrap { width: min(100% - 2rem, 76rem); margin-inline: auto; }

/* Site header */
.site-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding-block: 1.25rem;
}
.site-head a { color: inherit; text-decoration: none; }
.site-head a:hover { text-decoration: underline; }
.site-name { font-weight: 700; font-stretch: 112%; letter-spacing: -0.01em; }
.site-nav { display: flex; gap: 1.25rem; font-size: 0.9375rem; }

/* The width axis carries the type: names wide and heavy, numbers tall and narrow. */
.display {
  font-weight: 800;
  font-stretch: 125%;
  letter-spacing: -0.035em;
  line-height: 0.9;
  margin: 0;
}

h2 {
  font-size: 1.625rem;
  font-weight: 750;
  font-stretch: 120%;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 1rem;
}

h3 { font-size: 1.0625rem; font-weight: 700; margin: 0 0 0.35rem; }

p { margin: 0 0 1rem; max-width: var(--measure); }

.lede { font-size: 1.25rem; line-height: 1.5; color: var(--muted); max-width: 46ch; }

section { padding-block: 4rem; border-top: 1px solid var(--rule); }
section:first-of-type { border-top: 0; }

/* A full-width dark band: the terminal's world. */
.band { background: var(--deep); color: var(--on-deep); border-top: 0; }
.band .lede { color: var(--on-deep-muted); }
.band a { color: var(--t-cyan); }
.band + section { border-top: 0; }

.site-foot {
  padding-block: 2rem 3rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.875rem;
}

/* Command block with copy button */
.command {
  display: flex;
  align-items: stretch;
  max-width: 100%;
  background: var(--deep);
  border: 1px solid transparent;
  color: #e6edf2;
  border-radius: 6px;
  overflow: hidden;
}
.command code {
  flex: 1;
  min-width: 0;
  padding: 0.9rem 1rem;
  overflow-x: auto;
  white-space: nowrap;
  font-size: 0.9rem;
}
.command code::before { content: "$ "; color: #7d8b97; user-select: none; }
.copy {
  flex: none;
  border: 0;
  border-left: 1px solid #263642;
  background: transparent;
  color: #e6edf2;
  font: 600 0.875rem var(--sans);
  padding: 0 1.1rem;
  cursor: pointer;
  min-width: 5.5rem;
}
.copy:hover { background: #1b2a37; }
.band .command { background: var(--deep-2); border-color: #23384a; }
.copy[data-state="done"] { color: var(--t-green); }

/* kaffy renders: a real terminal frame */
.terminal {
  background: var(--t-bg);
  color: var(--t-fg);
  border-radius: 8px;
  box-shadow: 0 1px 0 rgb(255 255 255 / 0.04) inset, 0 24px 48px -24px rgb(8 20 30 / 0.55);
  overflow: hidden;
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.5rem 0.5rem 0;
  overflow-x: auto;
}
.terminal-bar [role="tab"] {
  border: 0;
  border-radius: 5px 5px 0 0;
  background: transparent;
  color: #93a1ad;
  font: 500 0.875rem var(--sans);
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  white-space: nowrap;
}
.terminal-bar [role="tab"]:hover { color: var(--t-fg); }
.terminal-bar [role="tab"][aria-selected="true"] { background: var(--t-bg); color: var(--t-fg); }
/* The screens carry kaffy's own colors; the background is its dark theme's. */
.terminal-screen { background: #0f1a24; overflow-x: auto; }

pre.tui {
  margin: 0;
  padding: 1rem 1.1rem 1.1rem;
  font-family: var(--mono);
  font-size: clamp(8.5px, 1.05vw, 12.5px);
  line-height: 1.32;
  color: var(--t-fg);
  width: max-content;
  min-width: 100%;
}
pre.tui[hidden] { display: none; }
.tui .fg-cyan { color: var(--t-cyan); }
.tui .fg-green { color: var(--t-green); }
.tui .fg-yellow { color: var(--t-yellow); }
.tui .fg-red { color: var(--t-red); }
.tui .fg-magenta { color: var(--t-magenta); }
.tui .fg-blue { color: var(--t-blue); }
.tui .fg-black { color: var(--t-black); }
.tui .fg-white { color: var(--t-white); }
.tui .bg-cyan { background: var(--t-cyan); }
.tui .bg-green { background: var(--t-green); }
.tui .bg-yellow { background: var(--t-yellow); }
.tui .bg-red { background: var(--t-red); }
.tui .bg-magenta { background: var(--t-magenta); }
.tui .rev:not([class*="bg-"]) { background: var(--t-fg); color: #17252f; }
.tui .b { font-weight: 700; }
.tui .dim { opacity: 0.55; }
/* Dim text on a selected (reversed) row: fade the text, keep the bar solid. */
.tui .rev.dim { opacity: 1; color: #55656f; }
.tui .u { text-decoration: underline; text-underline-offset: 2px; }

@media (prefers-reduced-motion: no-preference) {
  .copy, .terminal-bar [role="tab"] { transition: background-color 120ms, color 120ms; }
}