/* Testing Files Generator - project site.
 *
 * Dark only, by owner decision. No web fonts, no external stylesheet, no
 * script: the page makes no request to any host but its own, which is the
 * same promise the program makes and is worth keeping on the page about it.
 *
 * The neutrals and the accents started from the application's own palette in
 * internal/gui/parts/theme.go and were tuned for a screen held further away
 * than a desktop window. Keeping them in one block at the top is what stops a
 * second grey appearing halfway down the file.
 */

:root {
  --bg: #131417;
  --bg-deep: #0E0F12;
  --surface: #1B1D21;
  --surface-2: #22252A;
  --surface-3: #2A2E35;
  --border: #2E3238;
  --border-soft: #24272C;

  --text: #E8EAED;
  --text-dim: #B9C0CA;
  --muted: #949CA8;

  --accent: #6FB7F0;
  --accent-dim: #4E8FC4;
  --success: #6FCF7F;
  --success-dim: #4FA85F;
  --warning: #E8B33E;
  --danger: #F1707A;
  --on-bright: #10131A;

  --radius: 10px;
  --radius-lg: 14px;
  --wrap: 1080px;

  --mono: ui-monospace, "SFMono-Regular", "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "Noto Sans", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    transition: none !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------------------------------------------------------------- skip link */

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--on-bright);
  padding: 10px 16px;
  border-radius: 0 0 var(--radius) 0;
  font-weight: 600;
  z-index: 100;
}

.skip:focus {
  left: 0;
}

/* ------------------------------------------------------------------ topbar */

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(19, 20, 23, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-soft);
}

.topbar-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 62px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
  letter-spacing: -0.01em;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}

.brand img {
  border-radius: 6px;
}

.mainnav {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-right: auto;
}

.mainnav a {
  color: var(--text-dim);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 15px;
}

.mainnav a:hover {
  color: var(--text);
  background: var(--surface-2);
}

.mainnav a[aria-current="page"] {
  color: var(--text);
  background: var(--surface-2);
}

.langswitch {
  display: flex;
  gap: 6px;
}

.langswitch a {
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 999px;
}

.langswitch a:hover {
  color: var(--text);
  border-color: var(--accent-dim);
}

/* ------------------------------------------------------------- typography */

main {
  padding: 56px 20px 88px;
}

h1,
h2,
h3 {
  line-height: 1.22;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2rem, 1.3rem + 2.6vw, 3.1rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(1.4rem, 1.1rem + 1.1vw, 1.9rem);
  font-weight: 650;
  margin-top: 8px;
}

h3 {
  font-size: 1.15rem;
  font-weight: 650;
  margin-bottom: 8px;
}

p {
  margin: 0 0 18px;
  max-width: 72ch;
}

.lead {
  font-size: clamp(1.05rem, 1rem + 0.4vw, 1.25rem);
  color: var(--text-dim);
  max-width: 68ch;
}

a {
  color: var(--accent);
  text-underline-offset: 3px;
}

a:hover {
  color: #8FCAF6;
}

strong {
  color: #F2F5F8;
  font-weight: 650;
}

.muted {
  color: var(--muted);
}

hr {
  border: 0;
  border-top: 1px solid var(--border-soft);
  margin: 56px 0;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ----------------------------------------------------------------- section */

.section {
  margin: 64px 0 0;
  scroll-margin-top: 80px;
}

.section > p:last-child {
  margin-bottom: 0;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.11em;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 10px;
}

/* -------------------------------------------------------------------- hero */

/* The window screenshot is taller than it is wide, so on a wide screen it
 * sits beside the words instead of under them. Under them it pushed the whole
 * page down by its own height for no gain. */
.hero {
  padding-top: 8px;
  display: grid;
  gap: 34px;
  align-items: start;
}

@media (min-width: 1000px) {
  .hero {
    grid-template-columns: 1.08fr 0.92fr;
    gap: 52px;
  }
}

.hero h1 {
  max-width: 26ch;
}

.hero .lead {
  margin-bottom: 26px;
}

.hero-text > *:last-child {
  margin-bottom: 0;
}

.hero-shot {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
}

.hero-shot img {
  display: block;
  width: 100%;
  height: auto;
}

figure {
  margin: 0;
}

figcaption {
  padding: 10px 14px;
  font-size: 14px;
  color: var(--muted);
  border-top: 1px solid var(--border-soft);
}

/* ------------------------------------------------------------------ button */

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

.cta-note {
  margin-top: 12px;
  font-size: 14px;
  color: var(--muted);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius);
  font-weight: 650;
  font-size: 16px;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.button.primary {
  background: var(--success);
  color: var(--on-bright);
}

.button.primary:hover {
  background: #86DA94;
  color: var(--on-bright);
}

.button.ghost {
  border-color: var(--border);
  color: var(--text);
  background: var(--surface);
}

.button.ghost:hover {
  border-color: var(--accent-dim);
  color: var(--text);
  background: var(--surface-2);
}

/* ------------------------------------------------------------------- facts */

.facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px;
  margin: 42px 0 0;
  padding: 0;
  list-style: none;
}

.fact {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 18px 18px 16px;
}

.fact-figure {
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  display: block;
  line-height: 1.2;
}

.fact-label {
  color: var(--muted);
  font-size: 14.5px;
  margin: 4px 0 0;
}

/* ------------------------------------------------------------------- cards */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 20px;
}

.card-title {
  font-weight: 650;
  margin: 0 0 6px;
  color: var(--text);
}

.card p:last-child {
  margin-bottom: 0;
}

/* ------------------------------------------------------------------- lists */

ul.plain {
  list-style: none;
  padding: 0;
  margin: 0;
}

ul.plain li {
  margin-bottom: 6px;
}

.ticks {
  list-style: none;
  padding: 0;
  margin: 0 0 18px;
  max-width: 72ch;
}

.ticks li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 10px;
}

.ticks li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--success);
}

/* ------------------------------------------------------------------- table */

.tablewrap {
  overflow-x: auto;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  margin: 22px 0;
  background: var(--surface);
}

table.data {
  border-collapse: collapse;
  width: 100%;
  font-size: 15px;
}

table.data th,
table.data td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-soft);
  vertical-align: top;
}

table.data thead th {
  background: var(--surface-2);
  color: var(--text-dim);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
  position: sticky;
  top: 0;
}

table.data tbody tr:last-child td {
  border-bottom: 0;
}

table.data tbody tr:hover td {
  background: var(--surface-2);
}

table.data .num {
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* -------------------------------------------------------------------- code */

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--surface-2);
  border: 1px solid var(--border-soft);
  border-radius: 5px;
  padding: 1px 6px;
  color: #DCE6F2;
  white-space: nowrap;
}

pre {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  overflow-x: auto;
  margin: 18px 0;
  line-height: 1.55;
}

pre code {
  background: none;
  border: 0;
  padding: 0;
  font-size: 14.5px;
  color: #D7E2EE;
  white-space: pre;
}

/* --------------------------------------------------------------------- faq */

.faq {
  margin-top: 26px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.qa {
  border-bottom: 1px solid var(--border-soft);
  background: var(--surface);
}

.qa:last-child {
  border-bottom: 0;
}

.qa > summary {
  cursor: pointer;
  padding: 16px 20px;
  list-style: none;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.qa > summary::-webkit-details-marker {
  display: none;
}

.qa > summary::before {
  content: "+";
  color: var(--accent);
  font-family: var(--mono);
  font-size: 18px;
  line-height: 1.5;
  flex: 0 0 auto;
}

.qa[open] > summary::before {
  content: "\2212";
}

.qa > summary h2 {
  display: inline;
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.01em;
}

.qa > summary:hover {
  background: var(--surface-2);
}

.qa-body {
  padding: 0 20px 18px 46px;
}

.qa-body p:last-child {
  margin-bottom: 0;
}

/* ------------------------------------------------------------------ callout */

.note {
  border-left: 3px solid var(--accent);
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 16px 20px;
  margin: 24px 0;
}

.note.warn {
  border-left-color: var(--warning);
}

.note p:last-child {
  margin-bottom: 0;
}

.note-title {
  font-weight: 650;
  margin: 0 0 6px;
}

/* ------------------------------------------------------------------- steps */

.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 26px 0 0;
}

.steps > li {
  counter-increment: step;
  position: relative;
  padding-left: 46px;
  margin-bottom: 30px;
}

.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--accent);
  font-weight: 700;
  font-size: 14px;
  display: grid;
  place-items: center;
}

.steps h3 {
  margin-top: 3px;
}

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

.footer {
  border-top: 1px solid var(--border-soft);
  background: var(--bg-deep);
  padding: 46px 0 30px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 32px;
}

.footer-brand {
  font-weight: 650;
  margin: 0 0 8px;
}

.footer-head {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 12px;
  font-weight: 700;
}

.footer a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 15px;
}

.footer a:hover {
  color: var(--accent);
}

.footer-legal {
  margin-top: 34px;
  padding-top: 20px;
  border-top: 1px solid var(--border-soft);
}

.footer-legal p {
  font-size: 14px;
  margin: 0 0 6px;
}

/* ------------------------------------------------------------- narrow view */

@media (max-width: 760px) {
  body {
    font-size: 16px;
  }

  main {
    padding-top: 40px;
  }

  .topbar-inner {
    gap: 12px;
    padding-top: 10px;
    padding-bottom: 10px;
  }

  .mainnav {
    order: 3;
    width: 100%;
    margin-right: 0;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .qa-body {
    padding-left: 20px;
  }
}