/* SignalHarness.ai storefront design system — framework-free, light/dark, no external assets.
   Status: pre-launch artifact, deployed browse-only. */

:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --surface-2: #f0f1f3;
  --text: #191d23;
  --muted: #59626e;
  --border: #e2e4e8;
  --accent: #3d4cd6;
  --accent-ink: #ffffff;
  --accent-soft: #eceefc;
  --warn-bg: #fdf3dd;
  --warn-ink: #6b5205;
  --warn-border: #ecd9a4;
  --pill-bg: #eef0f3;
  --pill-ink: #454e5a;
  --code-bg: #f0f1f4;
  --shadow: 0 1px 2px rgba(16, 20, 28, 0.05), 0 8px 24px rgba(16, 20, 28, 0.06);
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e1116;
    --surface: #151a21;
    --surface-2: #1b212b;
    --text: #e7eaef;
    --muted: #98a2b0;
    --border: #262d38;
    --accent: #8b96ff;
    --accent-ink: #10131f;
    --accent-soft: #202742;
    --warn-bg: #2b2410;
    --warn-ink: #e8c96a;
    --warn-border: #4a3d15;
    --pill-bg: #212834;
    --pill-ink: #aeb7c4;
    --code-bg: #1a202a;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.35);
  }
}

:root[data-theme="dark"] {
  --bg: #0e1116;
  --surface: #151a21;
  --surface-2: #1b212b;
  --text: #e7eaef;
  --muted: #98a2b0;
  --border: #262d38;
  --accent: #8b96ff;
  --accent-ink: #10131f;
  --accent-soft: #202742;
  --warn-bg: #2b2410;
  --warn-ink: #e8c96a;
  --warn-border: #4a3d15;
  --pill-bg: #212834;
  --pill-ink: #aeb7c4;
  --code-bg: #1a202a;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
main { display: block; padding: 8px 0 56px; }
img { max-width: 100%; }

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.015em; }
h1 { font-size: clamp(1.9rem, 4.5vw, 3rem); margin: 0.4em 0; }
h2 { font-size: 1.45rem; margin: 2.2em 0 0.6em; }
h3 { font-size: 1.08rem; margin: 0 0 0.35em; }
p { margin: 0.55em 0; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

code, pre {
  font-family: ui-monospace, "Cascadia Code", Consolas, Menlo, monospace;
  font-size: 0.88em;
  background: var(--code-bg);
  border-radius: 6px;
}
code { padding: 0.12em 0.4em; }
pre { padding: 16px; overflow-x: auto; border: 1px solid var(--border); }
pre code { background: none; padding: 0; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: var(--accent-ink);
  padding: 10px 16px; z-index: 100; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

.prelaunch-banner {
  background: var(--warn-bg);
  color: var(--warn-ink);
  border-bottom: 1px solid var(--warn-border);
  text-align: center;
  padding: 9px 16px;
  font-size: 0.86rem;
  font-weight: 500;
}

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header .wrap {
  display: flex; align-items: center; gap: 20px;
  min-height: 60px; flex-wrap: wrap; padding-top: 8px; padding-bottom: 8px;
}
.brand {
  font-weight: 700; font-size: 1.06rem; letter-spacing: -0.01em;
  color: var(--text); text-decoration: none; white-space: nowrap;
}
.brand .dot { color: var(--accent); }
.site-nav { display: flex; gap: 2px; flex-wrap: wrap; margin-left: auto; }
.site-nav a {
  color: var(--muted); text-decoration: none; font-size: 0.92rem;
  padding: 7px 11px; border-radius: 8px;
}
.site-nav a:hover { color: var(--text); background: var(--surface-2); }
.site-nav a.active, .site-nav a[aria-current="page"] { color: var(--text); background: var(--surface-2); font-weight: 600; }
.theme-toggle {
  border: 1px solid var(--border); background: var(--surface); color: var(--muted);
  border-radius: 8px; padding: 6px 12px; font: inherit; font-size: 0.85rem; cursor: pointer;
}
.theme-toggle:hover { color: var(--text); }

.overline {
  display: inline-block;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--accent);
}
.hero { padding: 56px 0 12px; }
.hero .lede { font-size: 1.16rem; color: var(--muted); max-width: 46em; }

.status-strip {
  display: flex; flex-wrap: wrap; gap: 10px; margin: 26px 0 6px; padding: 0; list-style: none;
}
.status-strip li {
  background: var(--surface); border: 1px solid var(--border); border-radius: 999px;
  padding: 7px 15px; font-size: 0.85rem; color: var(--muted);
}
.status-strip li strong { color: var(--text); font-weight: 600; }

.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); margin: 18px 0; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow);
  display: flex; flex-direction: column; gap: 8px;
}
.card-top { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.card .promise { color: var(--muted); font-size: 0.94rem; flex-grow: 1; }

.pill {
  display: inline-block; border-radius: 999px; padding: 3px 11px;
  font-size: 0.74rem; font-weight: 600; white-space: nowrap;
  background: var(--pill-bg); color: var(--pill-ink);
}
.pill-status { background: var(--warn-bg); color: var(--warn-ink); border: 1px solid var(--warn-border); }
.pill-ok { background: var(--accent-soft); color: var(--accent); }

.meta { margin: 6px 0; font-size: 0.86rem; }
.meta > div { display: flex; gap: 8px; padding: 3px 0; border-top: 1px dashed var(--border); }
.meta dt { color: var(--muted); min-width: 9.5em; font-weight: 500; margin: 0; }
.meta dd { margin: 0; }

.tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 4px 0; }
.tags span {
  font-size: 0.72rem; color: var(--muted); background: var(--surface-2);
  border-radius: 6px; padding: 2px 8px;
}

.card-actions { display: flex; align-items: center; gap: 12px; margin-top: 8px; flex-wrap: wrap; }
.btn {
  display: inline-block; border-radius: 10px; padding: 9px 18px;
  font-weight: 600; font-size: 0.92rem; text-decoration: none;
  background: var(--accent); color: var(--accent-ink); border: 1px solid transparent;
}
.btn-secondary { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-disabled {
  background: var(--surface-2); color: var(--muted); border: 1px dashed var(--border);
  cursor: not-allowed; user-select: none;
}

.section { margin: 40px 0; }
.callout {
  background: var(--accent-soft); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 24px; margin: 24px 0;
}
.callout.plain { background: var(--surface); }

table { border-collapse: collapse; width: 100%; margin: 14px 0; font-size: 0.92rem; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
tbody tr:hover { background: var(--surface-2); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

details {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 18px; margin: 10px 0;
}
details summary { cursor: pointer; font-weight: 600; }
details[open] summary { margin-bottom: 6px; }

.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
ul.checks { padding-left: 1.3em; }
ul.checks li { margin: 5px 0; }

.site-footer {
  border-top: 1px solid var(--border); background: var(--surface);
  padding: 30px 0 40px; margin-top: 30px; font-size: 0.9rem;
}
.site-footer p { margin: 0.45em 0; }

@media (max-width: 640px) {
  .site-nav { margin-left: 0; }
  .hero { padding-top: 34px; }
  .meta dt { min-width: 7.5em; }
}

/* utility spacing (replaces inline style attributes; keeps CSP style-src 'self' strict) */
.mt-0{margin-top:0}
.mt-18{margin-top:18px}