/* Shared site chrome for the Accessibility Sandbox — a small, real multi-page
   site. This stylesheet is the ACCESSIBLE baseline: visible focus, good
   contrast, sensible layout. Individual demo pages add their own inline styles;
   the "inaccessible" demo deliberately breaks things inside <main> only, so this
   nav stays usable for presenting. */

:root{
  --bg:#eef1f4; --card:#ffffff; --ink:#1f2733; --muted:#54606e; --line:#d5dbe2;
  --brand:#2774AE; --brand-dark:#1d5a87; --ok:#177544; --bad:#c0392b;
  --okbg:#e6f4ec; --badbg:#fbeae8; --focus:#0b5fff; --gold:#FFD100;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:16px/1.6 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--ink)}
h1,h2,h3{line-height:1.25}
a{color:var(--brand-dark)}

/* --- accessible focus (the site default) --- */
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}

/* --- skip link --- */
.skip{position:absolute;left:8px;top:-60px;background:#10233a;color:#fff;
  padding:.6rem 1rem;border-radius:0 0 8px 8px;z-index:50;transition:top .15s}
.skip:focus{top:0}

/* --- site header + nav --- */
.site-header{background:var(--brand);color:#fff}
.site-header .bar{max-width:1000px;margin:0 auto;display:flex;flex-wrap:wrap;
  align-items:center;gap:.4rem 1.2rem;padding:.7rem 1.1rem}
.brand{font-weight:800;font-size:1.05rem;color:#fff;text-decoration:none;margin-right:auto;
  display:flex;align-items:center;gap:.5rem}
.brand .dot{width:12px;height:12px;border-radius:3px;background:var(--gold);display:inline-block}
.site-nav{display:flex;flex-wrap:wrap;gap:.15rem}
.site-nav a{color:#fff;text-decoration:none;padding:.45rem .7rem;border-radius:7px;font-size:.93rem}
.site-nav a:hover{background:rgba(255,255,255,.14)}
.site-nav a[aria-current="page"]{background:#fff;color:var(--brand-dark);font-weight:700}

/* --- layout --- */
main{max-width:1000px;margin:0 auto;padding:1.4rem 1.1rem 2.5rem}
.page-title{margin:.2rem 0 .3rem;font-size:1.6rem}
.page-intro{color:var(--muted);margin-top:0;font-size:1.02rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;
  padding:1.2rem 1.3rem;margin:1.1rem 0;box-shadow:0 1px 2px rgba(20,30,45,.05)}

/* --- homepage cards --- */
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem;margin-top:1.2rem}
.tile{display:block;text-decoration:none;color:inherit;background:var(--card);
  border:1px solid var(--line);border-radius:12px;padding:1.2rem;transition:transform .1s,box-shadow .1s}
.tile:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(20,30,45,.1)}
.tile .k{display:inline-block;font-size:.72rem;font-weight:800;letter-spacing:.05em;text-transform:uppercase;
  padding:.15rem .5rem;border-radius:6px;margin-bottom:.6rem}
.k.tool{background:#e7eefc;color:#274b9e}
.k.good{background:var(--okbg);color:var(--ok)}
.k.bad{background:var(--badbg);color:var(--bad)}
.tile h2{margin:.1rem 0 .35rem;font-size:1.15rem}
.tile p{margin:0;color:var(--muted);font-size:.95rem}

/* --- teaching aside on demo pages --- */
.notice{border-left:5px solid var(--brand);background:#eef5fb;border-radius:0 10px 10px 0;
  padding:.9rem 1.1rem;margin:1rem 0}
.notice h2{margin:.1rem 0 .5rem;font-size:1.02rem}
.notice ul{margin:.3rem 0 0;padding-left:1.2rem}
.notice li{margin:.25rem 0}
.notice.bad{border-left-color:var(--bad);background:var(--badbg)}
.notice.good{border-left-color:var(--ok);background:var(--okbg)}

/* --- "what a screen reader announces" transcript panel --- */
.sr-log{background:#10233a;color:#e7edf5;border-radius:10px;padding:1rem 1.15rem;margin:1.1rem 0}
.sr-log h2{color:#fff;margin:.1rem 0 .25rem;font-size:1.02rem}
.sr-log .cap{color:#9fb2c8;font-size:.86rem;margin:0 0 .5rem}
.sr-log ol{margin:.3rem 0 0;padding-left:1.35rem}
.sr-log li{margin:.4rem 0;font-size:.92rem;line-height:1.5}
.sr-log li::marker{color:#6f88a5}
.sr-log .role{color:#8fe0b4;font-weight:600}
.sr-log .ok{color:#8fe0b4}
.sr-log .bad{color:#ffab9e}

/* --- "reveal the problems" control + in-place annotations --- */
.reveal-bar{display:flex;flex-wrap:wrap;align-items:center;gap:.6rem 1rem;justify-content:space-between;
  background:var(--card);border:1px solid var(--line);border-radius:12px;padding:.9rem 1.1rem;margin:0 0 1.1rem}
.reveal-bar .rb-prompt{margin:0;color:var(--ink);font-size:1rem}
.reveal-btn{font:inherit;font-weight:700;cursor:pointer;border:0;border-radius:8px;padding:.55rem 1.1rem;
  background:var(--brand-dark);color:#fff;white-space:nowrap}
.reveal-btn:hover{filter:brightness(1.09)}
.reveal-btn[aria-pressed="true"]{background:#5b6470}
.reveal-note{margin:0 0 1.1rem;padding:.7rem .95rem;border-radius:9px;font-size:.96rem;
  background:#fff5e0;border:1px solid #f0d488;color:#7a4a00}
.demo-good .reveal-note{background:var(--okbg);border-color:#bfe3cd;color:#0f5f34}
.imgwrap{display:inline-block}

.demo-bad{--issue-color:#c0392b}
.demo-good{--issue-color:#1a7f4b}
.demo.revealing .issue{outline:2px dashed var(--issue-color);outline-offset:3px;border-radius:5px}
.demo.revealing .issue::after{content:attr(data-issue);display:inline-block;
  margin:.15rem 0 .15rem .5rem;font-size:.72rem;font-weight:700;line-height:1.35;
  padding:.14rem .5rem;border-radius:6px;background:var(--issue-color);color:#fff;
  vertical-align:middle;white-space:normal;max-width:100%}

footer.site-footer{border-top:1px solid var(--line);color:var(--muted);font-size:.85rem;
  max-width:1000px;margin:0 auto;padding:1.2rem 1.1rem 2rem}
code{font-family:ui-monospace,Menlo,Consolas,monospace;background:#e9edf1;padding:.05rem .3rem;border-radius:4px;font-size:.9em}
kbd{font:inherit;font-family:ui-monospace,Menlo,Consolas,monospace;background:#e9edf1;
  border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;padding:.05rem .35rem;font-size:.85em}