/* ptah.run — site stylesheet
 *
 * Tokens and measurements come from the Ptah website design (the 2a
 * consolidated homepage, the 1d install page, 1f mobile and 1g dark).
 * Fonts are self-hosted subsets of Instrument Sans (prose and interface
 * chrome) and IBM Plex Mono (anything that can be pasted into a terminal); the
 * ASCII wordmark uses the system monospace stack, as a terminal would. See
 * assets/fonts/LICENSES.md.
 */

/* ---------- Fonts ---------- */

@font-face {
  font-family: "Instrument Sans";
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url("fonts/instrument-sans-var-latin.woff2") format("woff2");
  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: "Instrument Sans";
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url("fonts/instrument-sans-var-symbols.woff2") format("woff2");
  unicode-range: U+2192, U+2197;
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/ibm-plex-mono-400-latin.woff2") format("woff2");
  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";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("fonts/ibm-plex-mono-500-latin.woff2") format("woff2");
  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";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("fonts/ibm-plex-mono-600-latin.woff2") format("woff2");
  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;
}
/* Box-drawing and arrow glyphs for the ASCII diagrams. Kept in the same
 * face so the columns stay aligned instead of falling back to a system font.
 * (Plex Mono has no ▼, so the diagrams use ↓, which the face does carry.) */
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/ibm-plex-mono-400-symbols.woff2") format("woff2");
  unicode-range: U+2190-2193, U+2500-257F;
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("fonts/ibm-plex-mono-500-symbols.woff2") format("woff2");
  unicode-range: U+2190-2193, U+2500-257F;
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("fonts/ibm-plex-mono-600-symbols.woff2") format("woff2");
  unicode-range: U+2190-2193, U+2500-257F;
}

/* ---------- Tokens ---------- */

:root {
  --sans: "Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
  --ascii: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;

  --bg: #fbfbfa;
  --fg: #111417;
  --fg2: #474d54;
  --mute: #666d76;
  --line: #d9dcdf;
  --line2: #ebedef;
  --code: #f3f4f4;
  --acc: oklch(0.47 0.16 238);
  --accbg: oklch(0.955 0.025 238);
  --term: #14181d;
  --termfg: #e2e6ea;
  --termmute: #7b858f;
  --termacc: oklch(0.8 0.11 230);
  --termline: rgba(255, 255, 255, 0.08);
  --amber: oklch(0.55 0.15 62);
  --termamber: oklch(0.8 0.15 70);
  --logo-ring: transparent;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #161311;
    --fg: #ede7de;
    --fg2: #b6ada0;
    --mute: #8d8377;
    --line: #2e2823;
    --line2: #201c18;
    --code: #1d1916;
    --acc: oklch(0.78 0.11 225);
    --accbg: oklch(0.27 0.05 235);
    --term: #0b0a09;
    --termfg: #ece5da;
    --termmute: #8d8377;
    --termacc: oklch(0.82 0.11 225);
    --termline: #2e2823;
    --amber: oklch(0.8 0.15 70);
    --termamber: oklch(0.8 0.15 70);
    --logo-ring: var(--line);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #161311;
  --fg: #ede7de;
  --fg2: #b6ada0;
  --mute: #8d8377;
  --line: #2e2823;
  --line2: #201c18;
  --code: #1d1916;
  --acc: oklch(0.78 0.11 225);
  --accbg: oklch(0.27 0.05 235);
  --term: #0b0a09;
  --termfg: #ece5da;
  --termmute: #8d8377;
  --termacc: oklch(0.82 0.11 225);
  --termline: #2e2823;
  --amber: oklch(0.8 0.15 70);
  --termamber: oklch(0.8 0.15 70);
  --logo-ring: var(--line);
  color-scheme: dark;
}

/* ---------- Base ---------- */

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}
a:hover {
  color: var(--acc);
}

h1,
h2,
h3,
p,
dl,
dd,
ul {
  margin: 0;
}

pre {
  margin: 0;
  font-family: var(--mono);
  overflow-x: auto;
  tab-size: 4;
}

code {
  font-family: var(--mono);
  font-size: 0.93em;
}

/* Inline code in prose: neutral chip, never colored. */
p code,
li code,
dd code,
dt code,
.tip code {
  background: var(--code);
  border: 1px solid var(--line2);
  padding: 0 4px;
  border-radius: 2px;
}

img,
svg {
  display: block;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--acc);
  outline-offset: 2px;
}

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

.skip {
  position: absolute;
  left: -9999px;
  top: 8px;
  z-index: 100;
  padding: 8px 12px;
  background: var(--fg);
  color: var(--bg);
  font: 500 14px var(--sans);
  border-radius: 2px;
  text-decoration: none;
}
.skip:focus {
  left: 8px;
}

.wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding-inline: 48px;
}

.label {
  font: 500 12px var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mute);
}

.v {
  font-family: var(--mono);
  color: var(--amber);
}

/* ---------- Header ---------- */

.site-header {
  position: relative;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font: 600 15px var(--sans);
  text-decoration: none;
}
.brand img {
  width: 22px;
  height: 22px;
  border-radius: 5px;
  outline: 1px solid var(--logo-ring);
}
.brand:hover {
  color: inherit;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 0;
  list-style: none;
  font: 500 14px var(--sans);
}
.nav-links a {
  text-decoration: none;
  white-space: nowrap;
}
.nav-links a[aria-current="page"] {
  color: var(--acc);
}

.icon-btn {
  width: 28px;
  height: 28px;
  border: 1px solid var(--line);
  border-radius: 2px;
  display: grid;
  place-items: center;
  color: var(--fg2);
}
.icon-btn:hover {
  color: var(--fg);
  border-color: var(--fg2);
}
.icon-btn svg {
  width: 14px;
  height: 14px;
}
:root[data-theme="dark"] .theme-btn svg {
  transform: scaleX(-1);
}
.menu-btn {
  display: none;
}
.menu-btn .icon-close {
  display: none;
}
.site-header.is-open .menu-btn .icon-menu {
  display: none;
}
.site-header.is-open .menu-btn .icon-close {
  display: block;
}

/* ---------- Buttons ---------- */

.actions {
  display: flex;
  gap: 10px;
}
.btn {
  display: inline-block;
  padding: 10px 18px;
  font: 500 14px var(--sans);
  line-height: 1.2;
  border-radius: 2px;
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid var(--fg);
  background: var(--fg);
  color: var(--bg);
}
.btn:hover {
  background: var(--fg2);
  border-color: var(--fg2);
  color: var(--bg);
}
.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--fg);
}
.btn-ghost:hover {
  background: transparent;
  border-color: var(--fg2);
  color: var(--fg);
}

/* ---------- Terminals and code ---------- */

.term {
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--term);
  color: var(--termfg);
  overflow: hidden;
}
.term-bar {
  display: flex;
  justify-content: space-between;
  padding: 8px 16px;
  border-bottom: 1px solid var(--termline);
  font: 12px var(--mono);
  color: var(--termmute);
}
.term pre {
  padding: 20px 22px;
  font: 13.5px/1.7 var(--mono);
}
.term .p {
  color: var(--termamber);
}
.code .p {
  color: var(--amber);
}
.term .m {
  color: var(--termmute);
}
.term .a {
  color: var(--termacc);
}

/* ---------- Hero demo ----------
 *
 * The scripted session in the hero. Without the script the transcript below is
 * the page: every command and every line of output is in the markup, which is
 * also what a screen reader and a search crawler read. The player hides that
 * copy from sight only, then replays it into .demo-screen.
 */
.demo .term-bar {
  align-items: center;
  gap: 12px;
}
.demo-where {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.demo-sync {
  margin-inline-start: auto;
  padding: 1px 7px;
  border: 1px solid var(--termline);
  border-radius: 2px;
  font-size: 11.5px;
  color: var(--termmute);
  white-space: nowrap;
}
/* Amber, not red: a pending change is the normal state of a migration tool,
 * not a fault. It is the same amber the prompt uses. */
.demo-sync[data-state="pending"] {
  color: var(--termamber);
  border-color: color-mix(in oklab, var(--termamber) 40%, transparent);
}
.demo-controls {
  display: flex;
  gap: 6px;
}
.demo-btn {
  border: 1px solid var(--termline);
  border-radius: 2px;
  background: none;
  color: var(--termfg);
  font: 500 12px var(--sans);
  padding: 3px 9px;
  min-height: 24px;
  cursor: pointer;
}
.demo-btn:hover {
  border-color: var(--termmute);
}
.demo-btn:focus-visible {
  outline: 2px solid var(--termacc);
  outline-offset: 1px;
}
.demo-screen {
  /* At rest the session is a transcript: its own height, readable top to
   * bottom, selectable and pasteable. While it plays it becomes a shell --
   * fixed height, scrolled to the end -- so the page does not reflow line by
   * line and the newest output stays where the eye already is.
   *
   * The height is the only thing that changes. Laying the lines out with flex
   * to pin them to the bottom looked equivalent and was not: a flex container
   * makes every child a row, so the `$` span left its command and stood on a
   * line of its own. */
  margin: 0;
  /* Ptah's diagnostics name the consequence and the safer order, so they are
   * long. Without wrapping they left the frame and the reader got half a
   * sentence: the reason is the finding, not decoration on it. */
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
/* One height whether or not it is playing, so the block does not jump when the
 * session starts. Scrollable rather than clipped: a reader who looks up from
 * the page mid-session should be able to go back and read what they missed
 * instead of waiting for the loop. */
@media (min-width: 721px) {
  .demo-screen {
    height: 372px;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: var(--termline) transparent;
  }
}
.demo-cursor {
  color: var(--termamber);
}
.demo-cursor[data-on="0"] {
  opacity: 0;
}
/* The line the database gained. It arrives with the apply, and the tint is the
 * only thing on this page that marks a moment rather than a kind of text. */
.demo-screen .n {
  color: var(--termacc);
  background: color-mix(in oklab, var(--termacc) 14%, transparent);
}
/* The demo's own narration, in the shell's syntax so nobody mistakes it for
 * something Ptah printed. Dimmer than Ptah's muted output for the same reason:
 * one of these is the program talking and the other is not. */
.term .c {
  color: color-mix(in oklab, var(--termmute) 72%, transparent);
}
/* The finding that stops the build. Amber rather than the accent: blue is the
 * SQL Ptah writes, and this is the line that says it will not write any. */
.demo-screen .e {
  color: var(--termamber);
}
/* How far through the session, as the last two pixels of the frame. It is the
 * one moving thing on the page that is not text, so it stays a rule rather
 * than becoming a bar with a track, a radius and a label. */
.demo-progress {
  height: 2px;
  background: var(--termline);
}
.demo-progress > span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--termacc);
}

/* The scenario chooser reads as a caption with a choice in it, not as a tab
 * strip: this page spends its chrome on the terminal, and two words in the
 * page's own type are enough to say which session is playing. */
.demo-pick {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  margin-top: 2px;
}
.demo-pick-btn {
  border: 0;
  border-bottom: 1px solid transparent;
  background: none;
  padding: 0 0 2px;
  font: 500 13px var(--sans);
  color: var(--mute);
  cursor: pointer;
}
.demo-pick-btn:hover {
  color: var(--fg2);
}
.demo-pick-btn[aria-pressed="true"] {
  color: var(--fg);
  border-bottom-color: var(--fg);
}
.demo-pick-btn:focus-visible {
  outline: 2px solid var(--acc);
  outline-offset: 3px;
}

.demo.is-live .demo-transcript {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.code {
  padding: 18px 22px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--code);
  font: 15px/1.6 var(--mono);
  color: var(--fg);
}
.code .m,
.cmd .m {
  color: var(--mute);
}
.code.plain {
  background: transparent;
  color: var(--fg2);
  font-size: 14px;
}

/* One-line command with a copy control. */
.cmd {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--code);
  min-width: 0;
}
.cmd pre {
  font: 13px/1.5 var(--mono);
  color: var(--fg);
  min-width: 0;
  flex: 1 1 auto;
  /* A command you copy should never hide its tail behind a scrollbar. */
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  overflow: visible;
}
.cmd .p {
  color: var(--amber);
}
.copy {
  flex-shrink: 0;
  font: 500 12px var(--sans);
  color: var(--mute);
  padding: 6px 8px;
  margin: -6px -8px;
  border-radius: 2px;
}
.copy:hover {
  color: var(--fg);
}
.copy[data-state="done"] {
  color: var(--acc);
}

/* ---------- Hero ---------- */

.hero {
  border-bottom: 1px solid var(--line);
}
.hero .wrap {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 64px;
  align-items: start;
  padding-top: 64px;
  padding-bottom: 56px;
}
.hero-copy {
  display: grid;
  gap: 26px;
}
.banner {
  font: 600 26px/1.2 var(--ascii);
  color: var(--fg);
  white-space: pre;
  overflow: visible;
}
.hero h1 {
  font: 500 38px/1.15 var(--sans);
  letter-spacing: -0.02em;
  text-wrap: balance;
}
.lede {
  font: 17px/1.55 var(--sans);
  color: var(--fg2);
  text-wrap: pretty;
  max-width: 540px;
}
.install {
  display: grid;
  gap: 8px;
}
.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 12px;
  font: 13px var(--sans);
  color: var(--mute);
}
.meta > span {
  overflow-wrap: anywhere;
}
.meta .v {
  font-size: 12.5px;
}
.meta code {
  font: 12.5px var(--mono);
  background: none;
  border: 0;
  padding: 0;
}
.hero-demo {
  display: grid;
  gap: 12px;
  padding-top: 6px;
  min-width: 0;
}
.caption {
  font: 14.5px/1.5 var(--sans);
  color: var(--fg2);
  text-wrap: pretty;
}

/* ---------- Sections ---------- */

.section {
  border-bottom: 1px solid var(--line);
}
.section .wrap {
  padding-top: 64px;
  padding-bottom: 64px;
}
h2 {
  font: 500 28px/1.25 var(--sans);
  letter-spacing: -0.015em;
  text-wrap: balance;
}

.week .wrap {
  display: grid;
  gap: 40px;
}
.section-head {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 64px;
  align-items: end;
}
.section-head p {
  font: 15px/1.55 var(--sans);
  color: var(--fg2);
}
.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.card {
  display: grid;
  gap: 16px;
  align-content: start;
  min-width: 0;
}
.card-head {
  display: grid;
  gap: 6px;
}
.card h3 {
  font: 500 19px/1.3 var(--sans);
}
.card .term pre {
  padding: 16px 18px;
  font: 12.5px/1.7 var(--mono);
}
.card p {
  font: 14px/1.55 var(--sans);
  color: var(--fg2);
}

.sources .wrap {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 64px;
  align-items: start;
}
.sources-copy {
  display: grid;
  gap: 18px;
}
.sources-copy p {
  font: 16px/1.55 var(--sans);
  color: var(--fg2);
  text-wrap: pretty;
  max-width: 520px;
}
.flags {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 24px;
  font: 14.5px/1.5 var(--sans);
  color: var(--fg2);
  max-width: 520px;
}
.flags dt {
  font: 13.5px var(--mono);
  color: var(--fg);
}
.diagram {
  padding: 24px 28px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--code);
  font: 14px/1.9 var(--mono);
  color: var(--fg);
}
.diagram b {
  font-weight: 600;
}

.facts {
  border-bottom: 0;
}
.facts .wrap {
  padding-top: 48px;
  padding-bottom: 48px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 48px;
  font: 14.5px/1.55 var(--sans);
  color: var(--fg2);
}
.fact {
  display: grid;
  gap: 8px;
  align-content: start;
}
.fact a {
  color: var(--acc);
}
.fact code.product {
  color: var(--fg);
}

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

.site-footer {
  border-top: 1px solid var(--line);
}
.site-footer .wrap {
  padding-top: 28px;
  padding-bottom: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  font: 13px var(--sans);
  color: var(--mute);
}
.foot-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.foot-brand img {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  outline: 1px solid var(--logo-ring);
}
.foot-brand .v {
  font-size: 12.5px;
}
.foot-links {
  display: flex;
  gap: 24px;
  padding: 0;
  list-style: none;
}
.foot-links a {
  text-decoration: none;
}

/* ---------- Install page ---------- */

.page .wrap {
  max-width: 976px; /* 880px of content plus the 48px gutters */
  padding-top: 64px;
  padding-bottom: 80px;
  display: grid;
  gap: 36px;
}
.page-head {
  display: grid;
  gap: 12px;
}
.page h1 {
  font: 500 38px/1.15 var(--sans);
  letter-spacing: -0.02em;
}
.page-head .lede {
  max-width: none;
  font: 17px/1.5 var(--sans);
}
.page-head .lede code {
  font-size: 15px;
}
.page-head .meta {
  font: 13px var(--sans);
}

.tabs {
  display: grid;
}
.tabs-head {
  display: flex;
  align-items: stretch;
  border-bottom: 1px solid var(--line);
}
.tablist {
  display: flex;
  gap: 2px;
}
.tab {
  font: 500 13.5px var(--sans);
  padding: 10px 16px;
  min-height: 44px;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  color: var(--mute);
  white-space: nowrap;
}
.tab:hover {
  color: var(--fg);
}
.tab[aria-selected="true"] {
  color: var(--fg);
  border-bottom-color: var(--acc);
}
.detected {
  margin-left: auto;
  align-self: center;
  padding-left: 16px;
  font: 12px var(--sans);
  color: var(--mute);
  white-space: nowrap;
}
.detected:empty {
  display: none;
}
.panel {
  padding: 28px 0 0;
  display: grid;
  gap: 20px;
}
.panel-title {
  display: none;
}
html.js .panel:not(.is-active) {
  display: none;
}
html:not(.js) .tabs-head {
  display: none;
}
/* The theme toggle only works with JavaScript; the system preference still applies. */
html:not(.js) .theme-btn {
  display: none;
}
html:not(.js) .panel-title {
  display: block;
  font: 500 13px var(--sans);
  color: var(--fg);
}
.panel p,
.block p {
  font: 15px/1.55 var(--sans);
  color: var(--fg2);
}
.panel .cmd {
  padding: 18px 22px;
}
.panel .cmd pre {
  font: 15px/1.6 var(--mono);
}

.block {
  display: grid;
  gap: 14px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.tips {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  font: 14px/1.5 var(--sans);
  color: var(--fg2);
}
.tip {
  display: grid;
  gap: 6px;
  align-content: start;
  min-width: 0;
}
.tip strong {
  font: 500 13px var(--sans);
  color: var(--fg);
}
.tip code {
  display: inline-block;
  max-width: 100%;
  overflow-wrap: anywhere;
}
.page .actions {
  padding-top: 12px;
}

/* ---------- 404 ---------- */

.notfound .wrap {
  max-width: 976px;
  padding-top: 96px;
  padding-bottom: 120px;
  display: grid;
  gap: 22px;
}
.notfound h1 {
  font: 500 38px/1.15 var(--sans);
  letter-spacing: -0.02em;
}
.notfound p {
  font: 17px/1.5 var(--sans);
  color: var(--fg2);
  max-width: 560px;
}

/* ---------- Responsive ---------- */

@media (max-width: 1100px) {
  .hero .wrap,
  .sources .wrap,
  .section-head {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-demo {
    padding-top: 0;
  }
  .section-head {
    gap: 12px;
  }
}

@media (max-width: 900px) {
  .cards {
    grid-template-columns: 1fr;
  }
  .facts .wrap {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .tips {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .wrap {
    padding-inline: 20px;
  }

  .site-header .wrap {
    height: 52px;
  }
  .brand {
    font-size: 14px;
  }
  .brand img {
    width: 20px;
    height: 20px;
  }
  .nav {
    gap: 0;
    margin-right: -12px;
  }
  .icon-btn {
    width: 44px;
    height: 44px;
    border: 0;
  }
  .icon-btn:hover {
    border: 0;
  }
  html.js .menu-btn {
    display: grid;
  }
  .menu-btn svg {
    width: 18px;
    height: 18px;
  }
  /* Without JavaScript there is no menu button, so the links stay inline. */
  html:not(.js) .nav-links {
    gap: 14px;
    font-size: 13px;
  }
  html.js .nav-links {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 20;
    padding: 8px 20px 16px;
    border-bottom: 1px solid var(--line);
    background: var(--bg);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    font-size: 16px;
  }
  .site-header.is-open .nav-links {
    display: flex;
  }
  .nav-links a {
    display: flex;
    align-items: center;
    min-height: 44px;
  }

  .hero .wrap {
    padding-top: 40px;
    padding-bottom: 32px;
    gap: 28px;
  }
  .hero-copy {
    gap: 20px;
  }
  .banner {
    font-size: 17px;
  }
  .hero h1 {
    font-size: 30px;
  }
  .lede {
    font-size: 16px;
  }
  .cmd {
    padding: 12px 14px;
  }
  .cmd pre {
    font-size: 13px;
  }
  .actions {
    display: grid;
    gap: 8px;
  }
  .btn {
    text-align: center;
    padding: 13px 18px;
  }
  .term pre,
  .card .term pre {
    padding: 14px 16px;
    font-size: 12.5px;
    line-height: 1.65;
  }

  .section .wrap {
    padding-top: 32px;
    padding-bottom: 32px;
  }
  .week .wrap {
    gap: 28px;
  }
  h2 {
    font-size: 22px;
  }
  .card h3 {
    font-size: 17px;
  }
  .diagram {
    padding: 16px 18px;
    font-size: 12.5px;
    line-height: 1.8;
  }
  .flags {
    grid-template-columns: 1fr;
    gap: 2px;
  }
  .flags dd {
    margin-bottom: 8px;
  }

  .site-footer .wrap {
    display: grid;
    gap: 14px;
    padding-top: 24px;
    padding-bottom: 24px;
    font: 12.5px var(--sans);
  }
  .foot-links {
    flex-wrap: wrap;
    gap: 12px 20px;
    order: -1;
  }

  .page .wrap {
    padding-top: 40px;
    padding-bottom: 48px;
    gap: 28px;
  }
  .page h1,
  .notfound h1 {
    font-size: 30px;
  }
  .page-head .lede {
    font-size: 16px;
  }
  .tabs-head {
    display: grid;
    gap: 8px;
    border-bottom: 0;
  }
  .tablist {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }
  .tab {
    padding: 10px 8px;
    margin-bottom: 0;
    border-bottom: 1px solid var(--line);
    text-align: center;
  }
  .tab[aria-selected="true"] {
    border-bottom-color: var(--line);
    box-shadow: inset 0 -2px 0 var(--acc);
  }
  .detected {
    margin-left: 0;
    padding-left: 0;
    white-space: normal;
  }
  .panel .cmd {
    padding: 14px 16px;
  }
  .panel .cmd pre,
  .code {
    font-size: 13.5px;
  }
  .code {
    padding: 14px 16px;
  }
  .notfound .wrap {
    padding-top: 56px;
    padding-bottom: 72px;
  }
}

@media (max-width: 720px) {
  /* At rest on a phone the session is a block of text in the page flow. It
   * only becomes a window when the reader presses Play. */
  .demo.is-playing .demo-screen {
    height: 320px;
    overflow-y: auto;
    overscroll-behavior: contain;
  }
  .demo .term-bar {
    flex-wrap: wrap;
    row-gap: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

/* ---------- Hero demo, expanded ----------
 *
 * The hero column is half a page wide, and Ptah's diagnostics are sentences.
 * Expanding moves the same terminal -- the same node, still playing -- into a
 * dialog where the lines have room to be read rather than wrapped four times.
 *
 * <dialog> rather than a div: focus containment, Escape and inertness behind
 * it are the browser's job, and each one hand-rolled is a way to trap a
 * keyboard user in a page they cannot leave.
 */
.demo-modal {
  width: min(1100px, calc(100vw - 48px));
  max-width: none;
  /* Anchored near the top rather than centred, because the session grows as it
   * plays: centring would move the whole frame under the reader's eye on every
   * line. */
  margin: 7vh auto auto;
  max-height: 86vh;
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  overflow: visible;
}
.demo-modal::backdrop {
  /* The page's own ground, not a black wash: the demo is part of this page and
   * should not look like a lightbox borrowed from another one. */
  background: color-mix(in oklab, var(--bg) 94%, transparent);
}
.demo-modal .term {
  border-color: var(--line);
}
/* Expanded, the frame is its final size from the first line. Sizing it to the
 * session instead made it grow a row at a time under a reader who was trying
 * to read it, and a frame that moves while you read it is worse than a frame
 * with room to spare at the bottom. */
.demo.is-open .demo-screen {
  height: min(72vh, 640px);
  overflow-y: auto;
}
@media (max-width: 720px) {
  .demo-modal {
    width: calc(100vw - 24px);
  }
  .demo.is-open .demo-screen {
    height: min(66vh, 480px);
  }
}