/* Roster marketing site: the layer every page shares.
 *
 * Colours, type, the menu bar, the buttons, the cards that ask a reader to sign up, and the
 * footer. The homepage and the three job pages add paper.css for the sheet they press their
 * pictures out of; the guides, the setup page and the legal pages add article.css or guide.css,
 * which were written against the older token names kept at the bottom of :root.
 *
 * One light theme, on purpose: the site is printed on paper. Text colours are solid rather than
 * translucent so their contrast is the same on paper, on a card and on a table row. */

:root {
  color-scheme: light;

  --paper: #eef0f3;
  --paper-2: #f6f7f9;
  --card: #ffffff;
  --fg: #1b222d;
  --fg-soft: #4b5462;
  --fg-faint: #6a7280;
  --line: rgba(27, 34, 45, 0.12);
  --rule-solid: #dfe3e8;
  --on-ink: #ffffff;
  --accent: #1a73e8;
  --accent-dark: #1765cc;
  --accent-soft: #e8f0fe;
  --benefit: #0b7a53;
  --good: #188038;
  --bad: #d93025;

  --display: "Bricolage Grotesque", "Avenir Next", system-ui, sans-serif;
  --body: "Geist", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono-face: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;

  --gut: max(16px, env(safe-area-inset-left, 0px));
  --gut-r: max(16px, env(safe-area-inset-right, 0px));
  --nav-h: 64px;
  --raised: 0 1px 2px rgba(27, 34, 45, 0.06), 0 24px 50px -34px rgba(27, 34, 45, 0.4);

  /* The names article.css, guide.css and the legal pages use. */
  --bg: var(--card);
  --bg-alt: #f3f5f8;
  --bg-sunken: #eceff3;
  --ink: var(--fg);
  --ink-soft: var(--fg-soft);
  --ink-faint: var(--fg-faint);
  --rule: var(--rule-solid);
  --blue: var(--accent);
  --blue-dark: var(--accent-dark);
  --blue-soft: var(--accent-soft);
  --red: var(--bad);
  --green: var(--good);
  --amber-bg: #fef7e0;
  --amber-line: #f9ab00;
  --radius: 10px;
  --radius-pill: 999px;
  --sans: var(--body);
  --mono: var(--mono-face);
}

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

html {
  -webkit-text-size-adjust: 100%;
  background: var(--paper);
}

/* The faint tooth of fine paper, so a page without a pressed picture is still the same stock. */
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--paper);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .1 0 0 0 0 .13 0 0 0 0 .18 0 0 0 .045 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  color: var(--fg);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body > main {
  flex: 1 0 auto;
}

img {
  max-width: 100%;
  height: auto;
}

button {
  font: inherit;
  color: inherit;
}

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

h1,
h2,
h3 {
  font-family: var(--display);
  font-weight: 650;
  letter-spacing: -0.024em;
  line-height: 1.08;
  text-wrap: balance;
}

.num,
code {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

.wrap {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding-left: var(--gut);
  padding-right: var(--gut-r);
}

@media (min-width: 761px) {
  .wrap {
    padding-left: max(32px, env(safe-area-inset-left, 0px));
    padding-right: max(32px, env(safe-area-inset-right, 0px));
  }
}

.eyebrow {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.lede {
  margin: 0;
  max-width: 54ch;
  text-wrap: pretty;
  font-size: 18px;
  line-height: 1.55;
  color: var(--fg-soft);
}

/* Read by screen readers, not shown. */
.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;
}

/* ---------- the menu bar ---------- */

/* A solid tint rather than frosted glass: a blur over the moving paper underneath costs more
   than the whole picture does. */
.nav {
  position: fixed;
  z-index: 50;
  top: 0;
  left: 0;
  right: 0;
  padding-top: env(safe-area-inset-top, 0px);
  background: rgba(238, 240, 243, 0.9);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s, background 0.25s;
}

.nav.scrolled {
  background: rgba(244, 245, 247, 0.96);
  border-bottom-color: var(--line);
}

.nav-in {
  display: flex;
  align-items: center;
  gap: 26px;
  height: var(--nav-h);
  padding-left: calc(var(--gut) + 2vw);
  padding-right: calc(var(--gut-r) + 2vw);
}

.brand {
  margin-right: auto;
  font-family: var(--display);
  font-weight: 750;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--fg);
  text-decoration: none;
}

.brand i {
  font-style: normal;
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 24px;
}

.nav-links a,
.nav-signin {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--fg-soft);
  text-decoration: none;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-signin:hover {
  color: var(--fg);
}

.nav-links a[aria-current="page"] {
  color: var(--fg);
}

/* Pages without a pressed first screen start below the bar. */
.below-nav {
  padding-top: calc(var(--nav-h) + env(safe-area-inset-top, 0px));
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  font-family: var(--body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 0.2s, background 0.2s, box-shadow 0.2s;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--fg);
  color: var(--on-ink);
  box-shadow: 0 10px 22px -12px rgba(27, 34, 45, 0.7);
}

.btn-primary:hover {
  background: #0f151e;
}

.btn-quiet {
  background: rgba(27, 34, 45, 0.07);
  color: var(--fg);
}

.btn-quiet:hover {
  background: rgba(27, 34, 45, 0.11);
}

.btn-sm {
  padding: 9px 16px;
  font-size: 14px;
}

.btn-lg {
  padding: 16px 30px;
  font-size: 17px;
}

.btn svg {
  width: 15px;
  height: 15px;
  flex: none;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
}

/* The reassurance under a sign-up button: what it costs and what it asks for. */
.cta-note {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-faint);
}

.text-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--fg);
  text-decoration: none;
}

.text-link:hover {
  color: var(--accent);
}

/* ---------- asking for the sign-up ---------- */

/* The closing card at the end of a page or a guide: one line on what Roster does for this
   reader, then one button. */
.cta-card {
  margin: 56px 0 0;
  padding: 30px 32px;
  border-radius: 18px;
  background: var(--fg);
  color: var(--on-ink);
  box-shadow: var(--raised);
}

.cta-card .cta-k {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
}

.cta-card h2 {
  margin: 0 0 10px;
  font-size: clamp(22px, 2.4vw, 28px);
  color: var(--on-ink);
}

.cta-card p {
  margin: 0 0 22px;
  max-width: 56ch;
  color: rgba(255, 255, 255, 0.78);
}

.cta-card .btn-primary {
  background: var(--on-ink);
  color: var(--fg);
  box-shadow: none;
}

.cta-card .btn-primary:hover {
  background: #e9edf2;
}

.cta-card .text-link {
  color: var(--on-ink);
}

.cta-card .text-link:hover {
  color: rgba(255, 255, 255, 0.75);
}

.cta-card .cta-note {
  color: rgba(255, 255, 255, 0.55);
}

/* The card inside a guide, after its first section: tied to what the reader just read. */
.cta-inline {
  display: flex;
  align-items: center;
  gap: 18px;
  margin: 32px 0;
  padding: 18px 20px;
  border-radius: 14px;
  background: var(--paper-2);
  box-shadow: inset 0 0 0 1px var(--line);
}

.cta-inline p {
  flex: 1;
  margin: 0;
  font-size: 15.5px !important;
  line-height: 1.5;
  color: var(--fg);
}

.cta-inline p b {
  font-weight: 600;
}

.cta-inline .btn {
  flex: none;
}

@media (max-width: 600px) {
  .cta-inline {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* On a wide screen, a small card waits in the margin once the reader is a third of the way in. */
.cta-rail {
  position: fixed;
  z-index: 20;
  right: max(28px, env(safe-area-inset-right, 0px));
  top: 50%;
  width: 220px;
  padding: 18px;
  border-radius: 16px;
  background: var(--card);
  box-shadow: var(--raised), inset 0 0 0 1px var(--line);
  opacity: 0;
  visibility: hidden;
  transform: translate(8px, -50%);
  transition: opacity 0.35s, transform 0.35s, visibility 0s 0.35s;
}

.cta-rail.on {
  opacity: 1;
  visibility: visible;
  transform: translate(0, -50%);
  transition: opacity 0.35s, transform 0.35s;
}

.cta-rail p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.45;
}

.cta-rail p b {
  display: block;
  margin-bottom: 4px;
  font-family: var(--display);
  font-size: 17px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.cta-rail .btn {
  width: 100%;
}

.cta-rail .cta-note {
  margin-top: 10px;
  text-align: center;
}

@media (max-width: 1239px) {
  .cta-rail {
    display: none;
  }
}

/* On a phone, one slim bar at the bottom of the screen, shown only when the page asks for it. */
.mbar {
  display: none;
}

@media (max-width: 760px) {
  .mbar {
    position: fixed;
    z-index: 40;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px var(--gut-r) calc(10px + env(safe-area-inset-bottom, 0px)) var(--gut);
    background: rgba(244, 245, 247, 0.97);
    border-top: 1px solid var(--line);
    transform: translateY(110%);
    transition: transform 0.3s ease;
  }

  .mbar.on {
    transform: none;
  }

  .mbar .btn {
    flex: 1;
  }

  .mbar .cta-note {
    flex: none;
    max-width: 9em;
    line-height: 1.35;
  }
}

/* ---------- footer ---------- */

.foot {
  margin-top: auto;
  padding: 56px 0 calc(32px + env(safe-area-inset-bottom, 0px));
  background: var(--paper-2);
  border-top: 1px solid var(--line);
  font-size: 14.5px;
}

.foot-in {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 2.4fr);
  gap: 40px;
}

.foot-brand p {
  margin: 10px 0 18px;
  max-width: 30ch;
  color: var(--fg-soft);
}

.foot-cols {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.foot-cols h2 {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-faint);
}

.foot-cols a {
  display: block;
  padding: 4px 0;
  color: var(--fg-soft);
  text-decoration: none;
}

.foot-cols a:hover {
  color: var(--fg);
}

.foot-base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-faint);
}

@media (max-width: 900px) {
  .foot-in {
    grid-template-columns: minmax(0, 1fr);
  }

  .foot-cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* A heading jumped to from a table of contents lands below the menu bar, not under it. */
.doc [id],
.article [id],
.guide [id] {
  scroll-margin-top: calc(var(--nav-h) + 20px);
}

/* ---------- legal pages ---------- */

.doc {
  padding: calc(var(--nav-h) + 56px) 0 88px;
}

.doc-inner {
  max-width: calc(68ch + 112px);
  padding-top: 48px;
  padding-bottom: 56px;
  background: var(--card);
  border-radius: 18px;
  box-shadow: var(--raised);
}

@media (min-width: 761px) {
  .doc-inner {
    padding-left: 56px;
    padding-right: 56px;
  }
}

@media (max-width: 760px) {
  .doc {
    padding-top: calc(var(--nav-h) + 16px);
  }

  .doc-inner {
    width: auto;
    margin: 0 var(--gut-r) 0 var(--gut);
    padding: 28px 20px 36px;
    border-radius: 14px;
  }
}

.doc h1 {
  font-size: clamp(32px, 4vw, 44px);
  margin: 0 0 12px;
}

.doc-meta {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg-faint);
  margin: 0 0 8px;
}

.doc-note {
  background: var(--bg-alt);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 16px 20px;
  margin: 28px 0 40px;
  font-size: 16px;
  color: var(--fg-soft);
}

.doc-note p {
  margin: 0;
}

.doc h2 {
  font-size: 23px;
  margin: 44px 0 12px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}

.doc h3 {
  font-size: 18px;
  margin: 26px 0 8px;
}

.doc p {
  margin: 0 0 14px;
}

.doc ul {
  margin: 0 0 16px;
  padding-left: 22px;
}

.doc li {
  margin-bottom: 8px;
}

.doc dl {
  margin: 0 0 18px;
}

.doc dt {
  font-weight: 600;
  font-size: 16px;
  margin-top: 18px;
}

.doc dd {
  margin: 4px 0 0;
  color: var(--fg-soft);
}

/* long addresses, such as an OAuth scope, break rather than push a phone's page sideways */
.doc code {
  overflow-wrap: anywhere;
  font-size: 0.88em;
  background: var(--bg-sunken);
  border-radius: 4px;
  padding: 2px 6px;
}

.doc pre {
  margin: 0 0 16px;
  padding: 16px 18px;
  background: var(--fg);
  color: #e8eaed;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.65;
}

.doc pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

.doc-warn {
  padding: 14px 18px;
  background: var(--amber-bg);
  border-left: 3px solid var(--amber-line);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 15.5px;
}

/* ---------- phones ---------- */

@media (max-width: 760px) {
  :root {
    --nav-h: 58px;
  }

  .nav-in {
    gap: 14px;
    padding-left: var(--gut);
    padding-right: var(--gut-r);
  }

  .nav-links {
    display: none;
  }

  .brand {
    font-size: 20px;
  }

  .nav-in > .btn {
    transition: opacity 0.2s, visibility 0s;
  }

  .prompt-on .nav-in > .btn {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0s 0.2s;
  }

  .lede {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn,
  .nav,
  .cta-rail,
  .mbar {
    transition: none;
  }

  .btn:hover {
    transform: none;
  }
}