/* Ironstrike brand tokens (copied from ironstrike-ai/index.html). Zero dependencies. */
:root{--bg:#0a0a0b;--panel:#141416;--steel-line:#38393e;--text:#eae8e4;--dim:#9a9a9f;--ember:#f5821f;--ember-bright:#ff9e42}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;min-height:100vh;display:flex;flex-direction:column}
.wrap{width:100%;max-width:760px;margin:0 auto;padding:24px 16px}
main.wrap{flex:1}
h1{font-size:2rem;line-height:1.15;margin:0 0 8px}
p{margin:0 0 12px}
a{color:var(--ember-bright)}
.lede{color:var(--dim)}
button,.btn{min-height:44px;min-width:44px;padding:10px 20px;font:inherit;font-weight:600;color:#0a0a0b;background:var(--ember);border:0;border-radius:8px;cursor:pointer}
button:focus-visible,a:focus-visible{outline:3px solid var(--ember-bright);outline-offset:2px}
.is-footer{border-top:1px solid var(--steel-line);color:var(--dim);font-size:.875rem;padding:16px;max-width:760px;margin:0 auto;width:100%}
.is-footer p{margin:0 0 8px}
@media (min-width:820px){.wrap{padding:40px 24px}h1{font-size:2.6rem}}
@media (min-width:1440px){.wrap{max-width:960px}}
/* Contrast */
.layout{display:block}
.field{margin-bottom:14px}
.field label{display:block;color:var(--dim);margin-bottom:6px;font-size:.95rem}
.pair{display:flex;gap:8px}
input[type=text]{flex:1;min-width:0;min-height:44px;padding:8px 12px;font:inherit;color:var(--text);background:var(--panel);border:1px solid var(--steel-line);border-radius:8px}
input[type=text][aria-invalid="true"]{border-color:#ff6b5e}
input[type=text]:focus-visible,input[type=color]:focus-visible{outline:3px solid var(--ember-bright);outline-offset:2px}
input[type=color]{width:56px;min-height:44px;padding:2px;background:var(--panel);border:1px solid var(--steel-line);border-radius:8px;cursor:pointer}
.alt{background:var(--panel);color:var(--text);border:1px solid var(--steel-line)}
.msg{min-height:1.5em;margin:12px 0 0;color:#ff9a8f;font-weight:600}
.out{margin-top:12px}
.sample{display:flex;flex-direction:column;gap:4px;padding:16px;border:1px solid var(--steel-line);border-radius:10px;margin-bottom:14px}
.sample strong{font-size:1.5rem;line-height:1.2}
.ratio-label{margin:0;color:var(--dim);font-size:.95rem}
.ratio{margin:0 0 10px;font-size:2.4rem;font-weight:700;color:var(--ember-bright);line-height:1.2}
.res{width:100%;border-collapse:collapse;margin-bottom:12px}
.res th,.res td{text-align:left;padding:10px 0;border-top:1px solid var(--steel-line);font-weight:400}
.res td{text-align:right;font-weight:700;white-space:nowrap}
.res .ok{color:#7ddc8e}
.res .no{color:#ff9a8f}
.how{color:var(--dim)}
.how summary{cursor:pointer;color:var(--text);min-height:44px;line-height:44px}
@media (min-width:820px){.layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px;align-items:start}.out{margin-top:0}}