/* Layout idea: ECG chart-paper grid as the page ground; condensed technical display type;
   codes always set in mono so they read like the claim form they end up on. */
:root{
  --paper:#f4f6f6;
  --surface:#ffffff;
  --ink:#13212b;
  --muted:#566873;
  --line:#d9e1e4;
  --grid:rgba(208,72,64,.09);
  --grid-strong:rgba(208,72,64,.16);
  --accent:#0d6870;
  --accent-ink:#ffffff;
  --signal:#cf3f34;
  --ok:#1d7448;
  --warn:#9a5c00;
  --crit:#b3261e;
  --ok-bg:#e5f3ea;
  --warn-bg:#fbf0dc;
  --crit-bg:#fbe7e5;
  --info-bg:#e3f0f1;
  --font-display:"IBM Plex Sans Condensed","Arial Narrow",system-ui,sans-serif;
  --font-body:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,"SF Mono",Menlo,monospace;
  --radius:6px;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --paper:#0d1417;--surface:#132027;--ink:#e3ebee;--muted:#93a6af;--line:#243640;
    --grid:rgba(235,95,85,.07);--grid-strong:rgba(235,95,85,.13);
    --accent:#5cc3ca;--accent-ink:#06282b;--signal:#ff6f61;
    --ok:#62c591;--warn:#e6aa4f;--crit:#ff7f73;
    --ok-bg:#12301f;--warn-bg:#33270f;--crit-bg:#3a1714;--info-bg:#10292d;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --paper:#0d1417;--surface:#132027;--ink:#e3ebee;--muted:#93a6af;--line:#243640;
  --grid:rgba(235,95,85,.07);--grid-strong:rgba(235,95,85,.13);
  --accent:#5cc3ca;--accent-ink:#06282b;--signal:#ff6f61;
  --ok:#62c591;--warn:#e6aa4f;--crit:#ff7f73;
  --ok-bg:#12301f;--warn-bg:#33270f;--crit-bg:#3a1714;--info-bg:#10292d;
  color-scheme:dark;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font:16px/1.6 var(--font-body);
  background-image:
    linear-gradient(var(--grid-strong) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-strong) 1px,transparent 1px),
    linear-gradient(var(--grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:40px 40px,40px 40px,8px 8px,8px 8px;
  background-attachment:fixed;
}
a{color:var(--accent)}
a:focus-visible,button:focus-visible,textarea:focus-visible,select:focus-visible,input:focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;
}
h1,h2,h3{font-family:var(--font-display);line-height:1.1;text-wrap:balance;margin:0}
code,.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}

/* Top bar */
.topbar{border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--paper) 88%,transparent);backdrop-filter:blur(6px);position:sticky;top:0;z-index:10}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:56px;flex-wrap:wrap}
.brand{font-family:var(--font-display);font-weight:700;font-size:19px;letter-spacing:.01em;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:10px}
.brand svg{flex:none}
.nav{display:flex;gap:18px;flex-wrap:wrap}
.nav a{color:var(--muted);text-decoration:none;font-size:14px;font-weight:500}
.nav a:hover,.nav a[aria-current="page"]{color:var(--ink)}

/* Panels */
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}
.eyebrow{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}

/* Buttons & fields */
.btn{appearance:none;border:1px solid var(--accent);background:var(--accent);color:var(--accent-ink);font:600 14px/1 var(--font-body);padding:10px 14px;border-radius:var(--radius);cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:8px}
.btn:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;color:var(--accent)}
.btn.small{padding:6px 10px;font-size:13px}
label{font-size:13px;font-weight:600;color:var(--muted);display:block;margin-bottom:6px}
textarea,select,input{width:100%;font:14px/1.5 var(--font-body);color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:10px 12px}
textarea{font-family:var(--font-mono);font-size:13px;resize:vertical}

/* Chips & status */
.chip{display:inline-flex;align-items:center;gap:6px;font:600 12px/1 var(--font-body);padding:5px 8px;border-radius:999px;border:1px solid transparent;white-space:nowrap}
.chip.ok{background:var(--ok-bg);color:var(--ok)}
.chip.warn{background:var(--warn-bg);color:var(--warn)}
.chip.crit{background:var(--crit-bg);color:var(--crit)}
.chip.info{background:var(--info-bg);color:var(--accent)}
.chip.mute{background:transparent;border-color:var(--line);color:var(--muted)}

.notice{border-left:3px solid var(--warn);background:var(--warn-bg);padding:10px 14px;border-radius:0 var(--radius) var(--radius) 0;font-size:14px}

/* Tool page header */
.toolhead{padding:36px 0 20px}
.toolhead h1{font-size:clamp(30px,4.4vw,46px);font-weight:700;letter-spacing:-.01em}
.toolhead p{max-width:68ch;color:var(--muted);margin:10px 0 0}

footer.site{border-top:1px solid var(--line);margin-top:56px;padding:24px 0 40px;color:var(--muted);font-size:13px}
footer.site .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}