/* The download page. Colours, type, spacing and motion come from the product's tokens
   (tokens.css, generated from packages/ui-tokens/tokens.json), so the page follows the system's
   light or dark theme exactly as the apps do. Logical properties only: the page is Arabic
   (right-to-left) first and English second (docs/clients/DESIGN.md). */

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

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

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

body {
  margin: 0;
  min-block-size: 100vh;
  background: var(--ch-color-bg);
  color: var(--ch-color-text);
  font-family: var(--ch-font-sans);
  font-size: var(--ch-font-size-md);
  line-height: var(--ch-font-leading-normal);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--ch-color-link);
  text-underline-offset: 0.2em;
}

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

code,
pre {
  font-family: var(--ch-font-mono);
  font-size: 0.9em;
}

:not(pre) > code {
  padding: 0.1em 0.35em;
  border-radius: var(--ch-radius-sm);
  background: var(--ch-color-code-bg);
  color: var(--ch-color-code-text);
}

.icon {
  inline-size: 1.25em;
  block-size: 1.25em;
  flex: none;
}

.skip {
  position: absolute;
  inset-inline-start: var(--ch-space-4);
  inset-block-start: -4rem;
  z-index: var(--ch-z-toast);
  padding: var(--ch-space-2) var(--ch-space-4);
  border-radius: var(--ch-radius-md);
  background: var(--ch-color-accent);
  color: var(--ch-color-accent-text);
}
.skip:focus {
  inset-block-start: var(--ch-space-4);
}

/* ---- Top bar: the one floating, glass surface ---- */

.topbar {
  position: sticky;
  inset-block-start: 0;
  z-index: var(--ch-z-chrome);
  background: var(--ch-glass-bg);
  backdrop-filter: var(--ch-glass-filter);
  -webkit-backdrop-filter: var(--ch-glass-filter);
  border-block-end: 1px solid var(--ch-glass-border);
}

.topbar-inner {
  display: flex;
  align-items: center;
  gap: var(--ch-space-4);
  max-inline-size: 72rem;
  margin-inline: auto;
  padding-inline: var(--ch-space-4);
  block-size: var(--ch-layout-topbar-height);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--ch-space-2);
  color: var(--ch-color-text);
  font-weight: 700;
  text-decoration: none;
}
.brand img {
  display: block;
}

.topnav {
  display: flex;
  gap: var(--ch-space-1);
  margin-inline-start: auto;
}
.topnav a {
  padding: var(--ch-space-1) var(--ch-space-3);
  border-radius: var(--ch-radius-full);
  color: var(--ch-color-text-muted);
  font-size: var(--ch-font-size-sm);
  text-decoration: none;
  transition: background var(--ch-motion-fast) var(--ch-motion-ease);
}
.topnav a:hover {
  background: var(--ch-color-surface-2);
  color: var(--ch-color-text);
}

.lang {
  display: inline-flex;
  align-items: center;
  gap: var(--ch-space-2);
  min-block-size: 2.25rem;
  padding-inline: var(--ch-space-3);
  border: 1px solid var(--ch-color-border);
  border-radius: var(--ch-radius-full);
  background: var(--ch-color-surface);
  color: var(--ch-color-text);
  font: inherit;
  font-size: var(--ch-font-size-sm);
  cursor: pointer;
}
.lang:hover {
  border-color: var(--ch-color-border-strong);
}

@media (max-width: 40rem) {
  .topnav {
    display: none;
  }
  .lang {
    margin-inline-start: auto;
  }
}

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

main {
  display: block;
}

.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: clamp(3rem, 9vw, 6.5rem) var(--ch-space-4) clamp(2.5rem, 6vw, 4rem);
}

.hero-glow {
  position: absolute;
  inset: -30% -10% auto;
  block-size: 42rem;
  z-index: -1;
  background:
    radial-gradient(
      closest-side,
      color-mix(in srgb, var(--ch-color-accent) 22%, transparent),
      transparent
    ),
    radial-gradient(
      closest-side at 70% 60%,
      color-mix(in srgb, var(--ch-color-chart-1) 10%, transparent),
      transparent
    );
  filter: blur(8px);
  pointer-events: none;
}

.hero-mark img {
  display: block;
  inline-size: clamp(4.5rem, 12vw, 6rem);
  block-size: auto;
  filter: drop-shadow(0 12px 28px color-mix(in srgb, var(--ch-color-accent) 35%, transparent));
  animation: rise var(--ch-motion-slow) var(--ch-motion-ease) both;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.96);
  }
}

.eyebrow {
  margin: var(--ch-space-6) 0 0;
  color: var(--ch-color-accent-soft-text);
  font-size: var(--ch-font-size-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
}
.hero .eyebrow {
  padding: var(--ch-space-1) var(--ch-space-3);
  border-radius: var(--ch-radius-full);
  background: var(--ch-color-accent-soft);
}

h1,
h2,
h3 {
  margin: 0;
  line-height: var(--ch-font-leading-tight);
  text-wrap: balance;
}

h1 {
  margin-block-start: var(--ch-space-4);
  max-inline-size: 18ch;
  font-size: clamp(2.1rem, 6vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}
:lang(ar) h1 {
  letter-spacing: 0;
}

.lead {
  max-inline-size: 38rem;
  margin: var(--ch-space-4) 0 0;
  color: var(--ch-color-text-muted);
  font-size: clamp(1.02rem, 2.2vw, 1.18rem);
  line-height: var(--ch-font-leading-relaxed);
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--ch-space-3);
  margin-block-start: var(--ch-space-8);
}

.release {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--ch-space-2) var(--ch-space-3);
  margin: var(--ch-space-5) 0 0;
  color: var(--ch-color-text-faint);
  font-size: var(--ch-font-size-sm);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--ch-space-3);
  min-block-size: 3rem;
  padding: var(--ch-space-2) var(--ch-space-5);
  border: 1px solid transparent;
  border-radius: var(--ch-radius-lg);
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition:
    transform var(--ch-motion-fast) var(--ch-motion-ease),
    background var(--ch-motion-fast) var(--ch-motion-ease),
    border-color var(--ch-motion-fast) var(--ch-motion-ease),
    box-shadow var(--ch-motion-fast) var(--ch-motion-ease);
}
.btn[href]:hover {
  transform: translateY(-1px);
}
.btn[href]:active {
  transform: none;
}

.btn-lg {
  min-block-size: 3.5rem;
  padding-inline: var(--ch-space-6);
  font-size: var(--ch-font-size-lg);
}

.btn-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.2;
  text-align: start;
}

.btn-meta {
  font-size: var(--ch-font-size-xs);
  font-weight: 500;
  opacity: 0.8;
}
/* A file name or size inside an Arabic button still starts at the button's start edge. */
.btn-text .btn-meta[dir='ltr'] {
  align-self: flex-start;
}

.btn-primary {
  background: var(--ch-color-accent);
  color: var(--ch-color-accent-text);
  box-shadow: 0 6px 18px color-mix(in srgb, var(--ch-color-accent) 28%, transparent);
}
.btn-primary:hover {
  background: var(--ch-color-accent-strong);
}

.btn-secondary {
  background: var(--ch-color-surface-2);
  border-color: var(--ch-color-border);
  color: var(--ch-color-text);
}
.btn-secondary:hover {
  border-color: var(--ch-color-border-strong);
}

.btn-quiet {
  background: transparent;
  border-color: var(--ch-color-border);
  color: var(--ch-color-text);
}
.btn-quiet:hover {
  background: var(--ch-color-surface-2);
}

.btn-store {
  background: var(--ch-color-surface);
  border-color: var(--ch-color-border-strong);
  color: var(--ch-color-text);
}
.btn-store:hover {
  background: var(--ch-color-surface-2);
}
/* Switched off in config.js: shown, not clickable. */
.btn-store:not([href]) {
  border-style: dashed;
  border-color: var(--ch-color-border);
  background: transparent;
  color: var(--ch-color-text-muted);
  cursor: default;
}
.btn-store:not([href]) .btn-meta {
  display: inline-block;
  margin-block-start: 2px;
  padding: 0 var(--ch-space-2);
  border-radius: var(--ch-radius-full);
  background: var(--ch-color-warning-soft);
  color: var(--ch-color-warning-soft-text);
  opacity: 1;
}

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

.section {
  max-inline-size: 72rem;
  margin-inline: auto;
  padding: clamp(2.5rem, 6vw, 4.5rem) var(--ch-space-4);
}

.section-head {
  margin-block-end: var(--ch-space-8);
  text-align: center;
}
.section-head h2,
.server h2 {
  font-size: clamp(1.6rem, 4vw, 2.25rem);
  font-weight: 800;
}
.section-head p {
  margin: var(--ch-space-2) 0 0;
  color: var(--ch-color-text-muted);
}

.notice {
  display: flex;
  align-items: flex-start;
  gap: var(--ch-space-3);
  max-inline-size: 48rem;
  margin: 0 auto var(--ch-space-6);
  padding: var(--ch-space-3) var(--ch-space-4);
  border-radius: var(--ch-radius-md);
  background: var(--ch-color-info-soft);
  color: var(--ch-color-info-soft-text);
  font-size: var(--ch-font-size-sm);
}
.notice a {
  color: inherit;
  font-weight: 600;
}
.notice[hidden] {
  display: none;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr));
  gap: var(--ch-space-4);
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--ch-space-5);
  padding: var(--ch-space-6);
  border: 1px solid var(--ch-color-border);
  border-radius: var(--ch-radius-xl);
  background: var(--ch-color-surface);
  box-shadow: var(--ch-shadow-sm);
  transition:
    border-color var(--ch-motion-normal) var(--ch-motion-ease),
    box-shadow var(--ch-motion-normal) var(--ch-motion-ease);
}
.card:hover {
  box-shadow: var(--ch-shadow-md);
}

/* The visitor's own system. */
.card.is-detected {
  order: -1;
  border-color: var(--ch-color-accent);
  box-shadow:
    0 0 0 3px color-mix(in srgb, var(--ch-color-accent) 18%, transparent),
    var(--ch-shadow-md);
}
@media (min-width: 44rem) {
  .card.is-detected {
    grid-column: 1 / -1;
  }
  .card.is-detected .actions {
    flex-direction: row;
    flex-wrap: wrap;
  }
}

.card-head {
  display: flex;
  align-items: center;
  gap: var(--ch-space-4);
}

.card-icon {
  display: grid;
  place-items: center;
  inline-size: 3rem;
  block-size: 3rem;
  flex: none;
  border-radius: var(--ch-radius-lg);
  background: var(--ch-color-accent-soft);
  color: var(--ch-color-accent-soft-text);
}
.card-icon .icon {
  inline-size: 1.5rem;
  block-size: 1.5rem;
}
.card-icon-lg {
  inline-size: 3.5rem;
  block-size: 3.5rem;
}

.card-title {
  flex: 1;
  min-inline-size: 0;
}
.card-title h3 {
  font-size: var(--ch-font-size-xl);
  font-weight: 700;
}

.req {
  margin: var(--ch-space-1) 0 0;
  color: var(--ch-color-text-muted);
  font-size: var(--ch-font-size-sm);
}

.chip {
  align-self: flex-start;
  padding: var(--ch-space-1) var(--ch-space-3);
  border-radius: var(--ch-radius-full);
  font-size: var(--ch-font-size-xs);
  font-weight: 700;
  white-space: nowrap;
}
.chip-detected {
  background: var(--ch-color-accent);
  color: var(--ch-color-accent-text);
}
.chip[hidden] {
  display: none;
}

.actions {
  display: flex;
  flex-direction: column;
  gap: var(--ch-space-2);
}
.actions .btn {
  justify-content: flex-start;
}

.install {
  margin-block-start: auto;
  border-block-start: 1px solid var(--ch-color-border);
  padding-block-start: var(--ch-space-3);
  font-size: var(--ch-font-size-sm);
}
.install summary {
  color: var(--ch-color-text-muted);
  font-weight: 600;
  cursor: pointer;
}
.install[open] summary {
  margin-block-end: var(--ch-space-2);
}
.install p {
  margin: var(--ch-space-2) 0;
  line-height: var(--ch-font-leading-relaxed);
}

.fine {
  margin: 0;
  color: var(--ch-color-text-faint);
  font-size: var(--ch-font-size-sm);
  line-height: var(--ch-font-leading-relaxed);
}

.code {
  margin: 0;
  padding: var(--ch-space-3) var(--ch-space-4);
  overflow-x: auto;
  border-radius: var(--ch-radius-md);
  background: var(--ch-color-code-bg);
  color: var(--ch-color-code-text);
  line-height: 1.6;
  text-align: start;
}

/* ---- Server ---- */

.server {
  display: grid;
  /* minmax(0, …): a long line of code scrolls inside its block instead of widening the page. */
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ch-space-8);
  align-items: start;
}
@media (min-width: 60rem) {
  .server {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--ch-space-12);
  }
}

.server-intro {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--ch-space-3);
}
.server-intro .eyebrow {
  margin: var(--ch-space-2) 0 0;
}
.server-intro .lead {
  margin: 0;
}

.image-row {
  display: flex;
  flex-direction: column;
  gap: var(--ch-space-2);
  inline-size: 100%;
  margin-block: var(--ch-space-2);
}
.image-label {
  display: flex;
  align-items: baseline;
  gap: var(--ch-space-2);
  font-weight: 600;
}
.image-label small {
  color: var(--ch-color-text-faint);
  font-weight: 400;
}

.copyable {
  display: flex;
  align-items: center;
  gap: var(--ch-space-2);
  padding: var(--ch-space-2);
  padding-inline-start: var(--ch-space-4);
  border: 1px solid var(--ch-color-border);
  border-radius: var(--ch-radius-md);
  background: var(--ch-color-surface);
}
.copyable code {
  flex: 1;
  min-inline-size: 0;
  overflow-x: auto;
  padding: 0;
  background: none;
  white-space: nowrap;
}

.copy {
  display: inline-flex;
  align-items: center;
  gap: var(--ch-space-1);
  min-block-size: 2rem;
  padding-inline: var(--ch-space-3);
  border: 1px solid var(--ch-color-border);
  border-radius: var(--ch-radius-sm);
  background: var(--ch-color-surface);
  color: var(--ch-color-text-muted);
  font: inherit;
  font-size: var(--ch-font-size-xs);
  cursor: pointer;
}
.copy:hover {
  color: var(--ch-color-text);
  border-color: var(--ch-color-border-strong);
}
.copy .icon {
  inline-size: 1rem;
  block-size: 1rem;
}
.copy .copy-done,
.copy.is-done .copy-idle {
  display: none;
}
.copy.is-done .copy-done {
  display: inline-flex;
  color: var(--ch-color-status-running);
}
.copy-idle,
.copy-done {
  display: inline-flex;
}

.steps {
  display: grid;
  gap: var(--ch-space-6);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
  grid-template-columns: minmax(0, 1fr);
}
.steps li {
  position: relative;
  min-inline-size: 0;
  padding-inline-start: 3rem;
  counter-increment: step;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: 0;
  display: grid;
  place-items: center;
  inline-size: 2rem;
  block-size: 2rem;
  border-radius: var(--ch-radius-full);
  background: var(--ch-color-accent-soft);
  color: var(--ch-color-accent-soft-text);
  font-weight: 700;
  font-size: var(--ch-font-size-sm);
}
.steps p {
  margin: 0.2rem 0 var(--ch-space-3);
}

.codeblock {
  /* dir="ltr" in the page: code and its copy button keep one order in both languages. */
  position: relative;
}
.codeblock .copy {
  position: absolute;
  inset-block-start: var(--ch-space-2);
  inset-inline-end: var(--ch-space-2);
}
.codeblock .code {
  padding-inline-end: 6rem;
  border: 1px solid var(--ch-color-border);
}
/* ---- Footer ---- */

.footer {
  margin-block-start: var(--ch-space-8);
  border-block-start: 1px solid var(--ch-color-border);
  background: var(--ch-color-bg-raised);
}
.footer-inner {
  display: grid;
  gap: var(--ch-space-4);
  max-inline-size: 72rem;
  margin-inline: auto;
  padding: var(--ch-space-8) var(--ch-space-4) var(--ch-space-10);
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--ch-space-2);
  font-weight: 700;
}
.footer-brand img {
  display: block;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ch-space-2) var(--ch-space-6);
}
.footer-links a {
  color: var(--ch-color-text-muted);
}
.footer-links a:hover {
  color: var(--ch-color-text);
}