/* zukeys.com - static public page (docs/pilot/05 D7). No web fonts, no scripts, no trackers.
   Colours are defined once as tokens below (light first, then dark via prefers-color-scheme); the brand blues are
   the app's brand tokens (apps/web/src/styles/tokens.css: fg-link, cobalt-800, focus; docs/11 §2.4), sampled from the
   owner's logo (design/brand/source). The neutrals are the app's own (canvas, surface, fg, fg-secondary as muted, line;
   docs/11 §1.3.1, review UXB-21), so "Sign in" lands on the same background. Every text / background pair meets WCAG AA. */

:root {
  color-scheme: light dark;
  --zk-canvas: #f5f4f1;        /* = app canvas (sand-50) */
  --zk-surface: #ffffff;
  --zk-fg: #0d120f;            /* = app fg (ink-950; 17.2:1 on the canvas) */
  --zk-fg-muted: #54524c;      /* = app fg-secondary (7.1:1 on the canvas) */
  --zk-line: #dfded9;          /* = app line */
  --zk-accent: #254ae3;        /* = app fg-link: links + primary button (6.6:1 on white, 6.0:1 on the canvas) */
  --zk-accent-hover: #1c35b4;  /* cobalt-800 (8.6:1 on the canvas) */
  --zk-on-accent: #ffffff;
  --zk-focus: #2f61f0;         /* = app focus, the logo blue (4.7:1 on the canvas) */
  --zk-note-bg: #fff6db;
  --zk-note-fg: #4d3b00;
  --zk-note-line: #e9cf7a;
  --zk-radius: 0.75rem;
  --zk-space-1: 0.25rem;
  --zk-space-2: 0.5rem;
  --zk-space-3: 0.75rem;
  --zk-space-4: 1rem;
  --zk-space-6: 1.5rem;
  --zk-space-8: 2rem;
  --zk-space-12: 3rem;
  --zk-measure: 42rem;
  --zk-font: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --zk-canvas: #090c0a;      /* = app dark canvas */
    --zk-surface: #121614;     /* = app dark surface */
    --zk-fg: #f3f2ef;          /* = app dark fg (17.6:1) */
    --zk-fg-muted: #c8c7c3;    /* = app dark fg-secondary (11.6:1) */
    --zk-line: #2a2f2d;        /* = app dark line */
    --zk-accent: #8da7f7;      /* = app dark fg-link (8.4:1 on the dark canvas, 7.8:1 on the surface) */
    --zk-accent-hover: #b4cafd; /* cobalt-200 (12.0:1) */
    --zk-on-accent: #0d120f;   /* = app ink (8.1:1 on the accent) */
    --zk-focus: #6ed2fd;       /* = app dark focus, the logo cyan (11.5:1) */
    --zk-note-bg: #2e2610;
    --zk-note-fg: #f3e2a6;
    --zk-note-line: #6b5717;
  }
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--zk-canvas);
  color: var(--zk-fg);
  font-family: var(--zk-font);
  font-size: 1.0625rem;
  line-height: 1.6;
}

a { color: var(--zk-accent); text-underline-offset: 0.15em; }
a:hover { color: var(--zk-accent-hover); }
:focus-visible { outline: 3px solid var(--zk-focus); outline-offset: 3px; border-radius: 0.25rem; }

.skip-link {
  position: absolute;
  left: var(--zk-space-4);
  top: calc(-1 * var(--zk-space-12));
  padding: var(--zk-space-2) var(--zk-space-4);
  background: var(--zk-surface);
  color: var(--zk-fg);
  border: 1px solid var(--zk-line);
  border-radius: var(--zk-radius);
}
.skip-link:focus { top: var(--zk-space-4); }

.wrap { width: 100%; max-width: var(--zk-measure); margin: 0 auto; padding: 0 var(--zk-space-4); }

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--zk-space-4);
  padding-top: var(--zk-space-6);
  padding-bottom: var(--zk-space-6);
}
.logo-link { display: inline-flex; line-height: 0; border-radius: 0.25rem; }
.logo-link img { width: 9.5rem; height: auto; }

main { flex: 1; }
.hero { padding: var(--zk-space-12) 0 var(--zk-space-8); }
h1 {
  font-size: clamp(1.875rem, 4.5vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 var(--zk-space-4);
  text-wrap: balance;
}
/* Type steps (tech-lead note T-01): body 1.0625 -> h3 1.1875 -> h2 1.5 (1.26x h3, 1.41x body) -> h1 >= 1.875 (1.25x h2). */
h2 { font-size: 1.5rem; line-height: 1.3; margin: var(--zk-space-8) 0 var(--zk-space-2); }
h3 { font-size: 1.1875rem; line-height: 1.4; margin: var(--zk-space-6) 0 var(--zk-space-1); }
.lead { font-size: 1.1875rem; color: var(--zk-fg); margin: 0 0 var(--zk-space-4); max-width: 36rem; }
.muted { color: var(--zk-fg-muted); }

.actions { display: flex; flex-wrap: wrap; gap: var(--zk-space-3); margin-top: var(--zk-space-8); }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: var(--zk-space-2) var(--zk-space-6);
  border-radius: var(--zk-radius);
  border: 1px solid var(--zk-accent);
  font-weight: 600;
  text-decoration: none;
}
.button-primary { background: var(--zk-accent); color: var(--zk-on-accent); }
.button-primary:hover { background: var(--zk-accent-hover); border-color: var(--zk-accent-hover); color: var(--zk-on-accent); }
.button-secondary { background: transparent; color: var(--zk-accent); }
.button-secondary:hover { color: var(--zk-accent-hover); border-color: var(--zk-accent-hover); }
.site-header .button { min-height: 2.5rem; padding: var(--zk-space-1) var(--zk-space-4); }

.panel {
  background: var(--zk-surface);
  border: 1px solid var(--zk-line);
  border-radius: var(--zk-radius);
  padding: var(--zk-space-6);
  margin: var(--zk-space-8) 0;
}
.panel p { margin: 0; }
.panel p + p { margin-top: var(--zk-space-2); }

.draft-note {
  background: var(--zk-note-bg);
  color: var(--zk-note-fg);
  border: 1px solid var(--zk-note-line);
  border-radius: var(--zk-radius);
  padding: var(--zk-space-4);
  margin: var(--zk-space-6) 0;
}
.draft-note strong { display: block; }

/* Vertical padding only: .prose sits on the same element as .wrap, whose side gutter must stay (R1K-V1 D-S1). */
.prose { padding-top: var(--zk-space-6); padding-bottom: var(--zk-space-12); }
.prose ul { padding-left: var(--zk-space-6); }
.prose li + li { margin-top: var(--zk-space-1); }
.prose table { width: 100%; border-collapse: collapse; margin: var(--zk-space-3) 0; font-size: 0.9375rem; }
.prose th,
.prose td { text-align: left; vertical-align: top; padding: var(--zk-space-2); border-bottom: 1px solid var(--zk-line); }
.prose th { font-weight: 600; }
.table-scroll { overflow-x: auto; }

.site-footer { border-top: 1px solid var(--zk-line); }
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: var(--zk-space-2) var(--zk-space-6);
  padding-top: var(--zk-space-6);
  padding-bottom: var(--zk-space-8);
  font-size: 0.9375rem;
  color: var(--zk-fg-muted);
}
.site-footer a { color: inherit; }

@media (prefers-reduced-motion: no-preference) {
  .button, a { transition: color 120ms ease, background-color 120ms ease, border-color 120ms ease; }
}

@media (max-width: 30rem) {
  .logo-link img { width: 8rem; }
  .hero { padding-top: var(--zk-space-8); }
  .actions .button { flex: 1 1 100%; }
}
.panel h2 { margin-top: 0; }