/* Cal44 — shared stylesheet for landing pages, EEAT pages and per-calculator stubs.
   Mirrors the brand colors of the SPA shell at index.html. */

:root{
  --bg:#f5f4f0; --bg2:#fafaf7; --text:#0b1121; --text2:#3a3f4d; --text3:#6b7280; --text4:#8a8f9a;
  --border:#e5e3dd; --amber:#d97706; --amber2:#f59e0b; --amber-soft:#fef3c7;
  --link:#b45309; --link-hover:#92400e;
  --fd:'Inter',system-ui,Segoe UI,sans-serif;
  --fm:'JetBrains Mono',ui-monospace,Menlo,monospace;
  --shadow:0 1px 2px rgba(11,17,33,.05),0 1px 3px rgba(11,17,33,.06);
  --radius:14px;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#0b1121; --bg2:#121a2e; --text:#f5f4f0; --text2:#c4c8d1; --text3:#9aa0ac; --text4:#7a8090; --border:#1f2a44; --amber-soft:rgba(245,158,11,.12); --link:#fbbf24; --link-hover:#fde68a; }
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--fd);
  background:var(--bg);
  color:var(--text);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

/* layout */
.wrap{max-width:920px;margin:0 auto;padding:18px 22px 80px}

/* header */
.page-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 22px;border-bottom:1px solid var(--border);
  background:var(--bg);position:sticky;top:0;z-index:10;
  backdrop-filter:saturate(140%) blur(8px);
}
.brand{font-family:var(--fd);font-size:22px;font-weight:800;color:var(--text);text-decoration:none;letter-spacing:-.03em}
.brand span{
  background:linear-gradient(135deg,#fcd34d,#d97706);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.page-nav a{
  color:var(--text2);text-decoration:none;font-size:14px;font-weight:500;
  margin-left:18px;
}
.page-nav a:hover{color:var(--link-hover)}

/* breadcrumb */
.breadcrumb{font-size:13px;color:var(--text3);margin:14px 0 6px}
.breadcrumb a{color:var(--text3);text-decoration:none}
.breadcrumb a:hover{color:var(--link-hover);text-decoration:underline}
.breadcrumb-sep{margin:0 6px;opacity:.5}

/* hero */
h1{font-size:clamp(28px,5vw,40px);font-weight:800;letter-spacing:-.035em;line-height:1.1;margin:8px 0 10px;color:var(--text)}
.tagline{font-size:17px;color:var(--text2);margin:0 0 16px;max-width:62ch}
.cta-row{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0 26px}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  background:linear-gradient(135deg,#f59e0b,#d97706);
  color:#0b1121;font-weight:700;font-size:15px;text-decoration:none;
  padding:11px 18px;border-radius:10px;border:none;cursor:pointer;
  box-shadow:var(--shadow);transition:transform .12s ease,box-shadow .12s ease;
}
.btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(217,119,6,.3)}
.btn.secondary{background:var(--bg2);color:var(--text);border:1px solid var(--border)}

/* sections */
h2{font-size:22px;font-weight:800;letter-spacing:-.025em;margin:32px 0 10px;color:var(--text);scroll-margin-top:80px}
h3{font-size:17px;font-weight:700;margin:20px 0 8px;color:var(--text)}
p{margin:0 0 12px;color:var(--text2);max-width:68ch}
ul,ol{margin:0 0 14px;padding-left:22px;color:var(--text2)}
li{margin:5px 0}
a{color:var(--link);text-decoration:none}
a:hover{color:var(--link-hover);text-decoration:underline}

/* ai-summary callout — easy for LLMs to extract */
.tldr{
  background:var(--amber-soft);
  border:1px solid var(--border);
  border-left:3px solid var(--amber);
  border-radius:10px;
  padding:14px 16px;margin:14px 0 22px;
  font-size:15px;
}
.tldr strong{color:var(--text)}

/* formula block */
.formula{
  background:var(--bg2);border:1px solid var(--border);border-radius:10px;
  padding:14px 16px;margin:10px 0 16px;
  font-family:var(--fm);font-size:15px;color:var(--text);
  overflow-x:auto;
}
.formula-vars{font-size:13.5px;color:var(--text2);margin-top:8px}

/* example */
.example{
  background:var(--bg2);border:1px solid var(--border);border-radius:10px;
  padding:14px 16px;margin:10px 0 16px;font-size:14.5px;
}
.example strong{color:var(--text)}

/* faq */
details{
  border:1px solid var(--border);border-radius:10px;
  padding:12px 14px;margin-bottom:8px;background:var(--bg2);
}
details summary{
  cursor:pointer;font-weight:600;color:var(--text);font-size:15px;
  list-style:none;display:flex;justify-content:space-between;align-items:center;
}
details summary::-webkit-details-marker{display:none}
details summary::after{content:'+';color:var(--amber);font-weight:700;font-size:20px;transition:transform .2s}
details[open] summary::after{transform:rotate(45deg)}
details p{margin:10px 0 0;color:var(--text2);font-size:14.5px}

/* related */
.related-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:10px;margin-top:10px;
}
.related-card{
  display:block;background:var(--bg2);border:1px solid var(--border);
  border-radius:10px;padding:12px 14px;text-decoration:none;
  transition:border-color .12s ease,transform .12s ease;
}
.related-card:hover{border-color:var(--amber);transform:translateY(-1px);text-decoration:none}
.related-card .rc-title{color:var(--text);font-weight:700;font-size:14.5px;margin:0 0 3px}
.related-card .rc-desc{color:var(--text3);font-size:13px;margin:0}

/* meta footer info */
.page-meta{
  margin-top:30px;padding-top:18px;border-top:1px solid var(--border);
  font-size:13px;color:var(--text3);display:flex;gap:14px;flex-wrap:wrap;
}

/* footer */
.page-footer{
  border-top:1px solid var(--border);background:var(--bg);
  padding:24px 22px;text-align:center;color:var(--text3);font-size:13px;
}
.page-footer nav{margin-bottom:8px;display:flex;flex-wrap:wrap;justify-content:center;gap:14px}
.page-footer a{color:var(--text3)}
.page-footer a:hover{color:var(--link-hover)}

/* tables (for comparison content where used) */
table{width:100%;border-collapse:collapse;margin:10px 0 16px;font-size:14px}
th,td{border:1px solid var(--border);padding:8px 10px;text-align:left;color:var(--text2)}
th{background:var(--bg2);color:var(--text);font-weight:700}

/* inline converter widget */
.conv{
  background:var(--bg2);border:1px solid var(--border);border-radius:14px;
  padding:18px;margin:6px 0 22px;display:grid;gap:10px;max-width:520px;
}
.conv-row{display:flex;align-items:stretch;gap:0;border:1px solid var(--border);border-radius:10px;overflow:hidden;background:var(--bg)}
.conv-row input{
  flex:1;min-width:0;border:none;background:transparent;color:var(--text);
  font-family:var(--fm);font-size:22px;font-weight:600;padding:12px 14px;outline:none;
}
.conv-row input:focus{box-shadow:inset 0 0 0 2px var(--amber)}
.conv-unit{
  display:flex;align-items:center;padding:0 16px;background:var(--bg2);
  border-left:1px solid var(--border);color:var(--text2);font-weight:600;font-size:14px;white-space:nowrap;
}
.conv-eq{text-align:center;color:var(--amber);font-weight:800;font-size:18px;font-family:var(--fm)}
.conv-swap{
  justify-self:start;display:inline-flex;align-items:center;gap:6px;
  background:none;border:1px solid var(--border);border-radius:8px;
  color:var(--text2);font-size:13px;font-weight:600;padding:6px 12px;cursor:pointer;
}
.conv-swap:hover{border-color:var(--amber);color:var(--link-hover)}

/* responsive */
@media (max-width:540px){
  .page-header{padding:10px 14px}
  .wrap{padding:12px 16px 60px}
  .page-nav a{margin-left:10px;font-size:13px}
}