/* ============================================================
   Shared page components — "Copper & Ledger"
   Used by /interview-ai/ and /aziz-ai/ (the homepage keeps its
   approved inline block). Tokens come from /css/tokens.css.
   External file so both pages run under a strict CSP with
   style-src 'self' (no inline styles).
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.6;
}
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
  text-wrap: balance;
}
p { margin: 0 0 1.1rem; }
a { color: var(--copper-deep); text-underline-offset: 3px; }
a:hover { color: var(--copper-hover); }

.wrap { max-width: var(--max-content); margin-inline: auto; padding-inline: var(--sp-5); }
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-mono-label);
  font-weight: 500;
  letter-spacing: var(--track-mono-label);
  text-transform: uppercase;
  color: var(--copper-deep);
}
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.muted { color: var(--ink-2); }
.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
.skip {
  position: absolute; left: 1rem; top: -3.5rem;
  background: var(--ink); color: var(--paper);
  padding: 0.6rem 1rem; border-radius: var(--r-chip); z-index: 100;
  transition: top .15s ease;
}
.skip:focus { top: 1rem; }

/* ---------- buttons (same system as the homepage) ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-body);
  font-weight: 600; font-size: 0.95rem;
  padding: 0.7rem 1.3rem; min-height: 44px;
  border-radius: var(--r-chip);
  text-decoration: none;
  border: 1px solid var(--ink);
  color: var(--ink);
  background: transparent;
  cursor: pointer;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.btn:hover { background: rgba(23, 26, 28, 0.06); color: var(--ink); }
.btn-copper { background: var(--copper-deep); border-color: var(--copper-deep); color: #FFFFFF; }
.btn-copper:hover { background: var(--copper-hover); border-color: var(--copper-hover); color: #FFFFFF; }
.btn-sm { padding: 0.45rem 0.95rem; font-size: 0.85rem; min-height: 44px; }

/* ---------- nav (same structure as the homepage) ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid transparent;
}
.nav.scrolled, .nav.open { border-bottom: var(--hairline); }
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 64px; gap: var(--sp-4);
}
.brand {
  font-family: var(--font-display); font-weight: 600;
  color: var(--ink); text-decoration: none; font-size: 1.05rem;
  letter-spacing: -0.01em; min-height: 44px; display: inline-flex; align-items: center;
}
.nav-links { list-style: none; margin: 0; padding: 0; display: none; gap: var(--sp-5); align-items: center; }
.nav-links a {
  display: inline-flex; align-items: center; min-height: 44px;
  color: var(--ink); text-decoration: none; font-size: 0.92rem;
  border-bottom: 2px solid transparent; padding: 0 2px;
}
.nav-links a:hover { color: var(--copper-hover); }
.nav-links a[aria-current="page"] { border-bottom-color: var(--copper); }
.nav-links a.nav-ai { color: var(--copper-deep); font-weight: 600; }
.nav-links a.nav-ai:hover { color: var(--copper-hover); }
.nav-actions { display: flex; align-items: center; gap: var(--sp-3); }
.menu-btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; min-width: 44px;
  background: none; border: 1px solid var(--grid); border-radius: var(--r-chip);
  padding: 0.45rem 0.85rem; font: inherit; font-size: 0.85rem;
  cursor: pointer; color: var(--ink);
}
.nav.open .nav-links {
  display: flex; flex-direction: column; align-items: flex-start;
  position: absolute; left: 0; right: 0; top: 100%;
  background: var(--paper); border-bottom: var(--hairline);
  padding: var(--sp-4) var(--sp-5) var(--sp-5); gap: var(--sp-2);
}
@media (min-width: 800px) {
  .nav-links { display: flex; }
  .menu-btn { display: none; }
}

/* ---------- footer band ---------- */
.site-foot {
  border-top: var(--hairline);
  margin-top: var(--sp-9);
  padding: var(--sp-6) 0;
  color: var(--ink-2); font-size: var(--text-small);
}
.site-foot a { color: var(--ink-2); }
.site-foot a:hover { color: var(--copper-hover); }

@media print { .nav, .skip, .chatbar { display: none !important; } }