/* DesignFlow landing + docs — one stylesheet for every page.
 *
 * Static site, no build step. Served by Caddy from /srv/landing (see
 * deploy/Caddyfile). Colour tokens are defined once on :root for light and
 * overridden under prefers-color-scheme: dark; nothing else is themed.
 * All foreground/background pairs clear 4.5:1. */

:root {
  color-scheme: light dark;

  --bg: #ffffff;
  --surface: #f6f7f9;
  --fg: #16181d;
  --muted: #4d545f;
  --border: #dde1e8;
  --accent: #1d4ed8;
  --btn-bg: #1d4ed8;
  --btn-fg: #ffffff;
  --code-bg: #f2f4f7;
  --code-fg: #1f2430;
  --note-bg: #fdf6e8;
  --note-border: #d9b96a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #171a20;
    --fg: #e8eaee;
    --muted: #a9b1be;
    --border: #2a2f38;
    --accent: #9db6ff;
    --btn-bg: #9db6ff;
    --btn-fg: #0f1115;
    --code-bg: #171a20;
    --code-fg: #dfe3ea;
    --note-bg: #1d1a12;
    --note-border: #6b5a2c;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font:
    16px/1.65 system-ui,
    -apple-system,
    'Segoe UI',
    Roboto,
    Helvetica,
    Arial,
    sans-serif;
  -webkit-text-size-adjust: 100%;
}

.wrap {
  width: 100%;
  max-width: 46rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* --- header / nav ------------------------------------------------------- */

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem 1.25rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.brand {
  font-weight: 600;
  font-size: 1rem;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-left: auto;
  font-size: 0.875rem;
}

.site-nav a {
  color: var(--muted);
}

.site-nav a:hover,
.site-nav a[aria-current='page'] {
  color: var(--fg);
}

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

main {
  padding: 2.5rem 0 3rem;
}

h1 {
  margin: 0 0 0.5rem;
  font-size: 2rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h2 {
  margin: 2.5rem 0 0.75rem;
  font-size: 1.25rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

h3 {
  margin: 1.75rem 0 0.5rem;
  font-size: 1rem;
}

p,
li {
  margin: 0 0 0.75rem;
}

ul,
ol {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}

.lede {
  font-size: 1.0625rem;
  color: var(--muted);
  max-width: 38rem;
}

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

a {
  color: var(--accent);
}

a:hover {
  text-decoration: none;
}

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

/* --- panels, columns ---------------------------------------------------- */

.cols {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
}

.panel {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  padding: 1rem 1.25rem;
}

.panel h3 {
  margin-top: 0;
}

.panel ul {
  margin-bottom: 0;
}

.note {
  border: 1px solid var(--note-border);
  border-left-width: 4px;
  border-radius: 6px;
  background: var(--note-bg);
  padding: 0.75rem 1rem;
  margin: 0 0 1rem;
}

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

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

.steps {
  list-style: none;
  counter-reset: step;
  padding: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
}

.steps li {
  counter-increment: step;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin: 0;
}

.steps li::before {
  content: counter(step);
  display: block;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

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

.downloads {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0 0 0.75rem;
}

.dl {
  display: inline-block;
  min-width: 15rem;
  padding: 0.85rem 1.25rem;
  border-radius: 8px;
  background: var(--btn-bg);
  color: var(--btn-fg);
  text-decoration: none;
  font-weight: 600;
}

.dl:hover {
  filter: brightness(1.08);
}

.dl-meta {
  display: block;
  font-weight: 400;
  font-size: 0.8125rem;
  opacity: 0.9;
}

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

code {
  font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
  font-size: 0.875em;
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

pre {
  background: var(--code-bg);
  color: var(--code-fg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.9rem 1rem;
  overflow-x: auto;
  margin: 0 0 1rem;
}

pre code {
  background: none;
  padding: 0;
  font-size: 0.8125rem;
  line-height: 1.55;
}

/* --- tables ------------------------------------------------------------- */

.table-scroll {
  overflow-x: auto;
  margin: 0 0 1rem;
}

table {
  border-collapse: collapse;
  width: 100%;
  min-width: 30rem;
  font-size: 0.9375rem;
}

th,
td {
  border-bottom: 1px solid var(--border);
  padding: 0.5rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

th {
  font-weight: 600;
}

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

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0 2.5rem;
  font-size: 0.875rem;
  color: var(--muted);
}

.site-footer p {
  margin: 0 0 0.35rem;
}