/* Shared stylesheet for every built site. System fonts only and no external requests: the ad-free Content-Security-Policy allows
   nothing but 'self' and data: images. Colours were checked against WCAG AA (text 4.5:1, control borders 3:1) in both schemes. */
:root{
  color-scheme:light dark;
  --bg:#fbf7f1;--surface:#fff;--fg:#2a2119;--muted:#6b5d52;--line:#e6dccf;--field:#8a7b6e;
  --accent:#b5471f;--strong:#97390f;--on-accent:#fff;--soft:#f8e6da;--err:#b3261e;
  --shadow:0 1px 2px rgba(60,40,20,.06),0 8px 24px rgba(60,40,20,.07);
  --serif:ui-serif,"Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Times New Roman",serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
@media (prefers-color-scheme:dark){:root{--bg:#17120e;--surface:#211a15;--fg:#f3ebe2;--muted:#b9aa9c;--line:#3a2f26;--accent:#f0956a;--strong:#f7b08c;--on-accent:#2a1408;--soft:#31231a;--err:#ff8a80;--shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35)}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg) linear-gradient(180deg,var(--soft) 0,var(--bg) 22rem) no-repeat;color:var(--fg);font:1.0625rem/1.65 var(--sans)}
a{color:var(--accent);text-underline-offset:.15em}
a:hover{color:var(--strong)}
::selection{background:var(--accent);color:var(--on-accent)}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.skip{position:absolute;left:-999px}
.skip:focus{left:8px;top:8px;background:var(--surface);padding:10px 14px;border-radius:8px;z-index:9}

/* Header and navigation */
.site-header{background:var(--surface);border-bottom:1px solid var(--line)}
.header-inner,main,.footer-inner{max-width:64rem;margin:0 auto;padding-left:20px;padding-right:20px}
.header-inner{display:flex;flex-wrap:wrap;align-items:center;gap:6px 28px;padding-top:12px;padding-bottom:12px}
.brand{display:flex;align-items:center;gap:11px;font:700 1.2rem/1.2 var(--serif);color:var(--fg);text-decoration:none}
.brand:hover{color:var(--fg)}
.mark{display:grid;place-items:center;flex:none;width:36px;height:36px;border-radius:10px;background:var(--accent);color:var(--on-accent);font:700 1.2rem/1 var(--serif)}
.nav{display:flex;flex-wrap:wrap;gap:4px}
.nav a{display:inline-flex;align-items:center;min-height:44px;padding:0 14px;border-radius:999px;color:var(--muted);font-size:.95rem;font-weight:600;text-decoration:none}
.nav a:hover,.nav a[aria-current=page]{background:var(--soft);color:var(--strong)}

/* Page structure */
main{padding-top:8px;padding-bottom:24px}
.prose{max-width:44rem}
.notes{margin-top:44px;border-top:1px solid var(--line)}
.tool-head{padding:30px 0 6px}
.hero{padding:44px 0 8px}
h1{font:700 clamp(1.85rem,4.4vw,2.7rem)/1.15 var(--serif);letter-spacing:-.01em;margin:0 0 .6rem;text-wrap:balance}
.hero h1{font-size:clamp(2.1rem,5.4vw,3.2rem)}
h2{font:700 1.45rem/1.3 var(--serif);margin:2.2rem 0 .6rem}
.lede{font-size:1.12rem;color:var(--muted);max-width:42rem;margin:0}

/* Tool: inputs on the left, result on the right (stacked on a phone) */
.tool{display:grid;gap:20px;margin:24px 0 8px}
@media (min-width:56rem){.tool{grid-template-columns:minmax(0,5fr) minmax(0,6fr);align-items:start}}
#tool-form{display:grid;gap:18px;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:var(--shadow)}
.field{display:grid;gap:6px}
label{font-size:.94rem;font-weight:650}
input,textarea,select{font:inherit;width:100%;min-height:48px;padding:10px 14px;border:1.5px solid var(--field);border-radius:10px;background:var(--surface);color:var(--fg);transition:border-color .15s,box-shadow .15s}
input:hover,textarea:hover,select:hover{border-color:var(--strong)}
input:focus,textarea:focus,select:focus{outline:3px solid transparent;border-color:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 28%,transparent)}
textarea{resize:vertical}
select{appearance:none;padding-right:44px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='9' viewBox='0 0 14 9'%3E%3Cpath d='M1 1.5l6 6 6-6' fill='none' stroke='%238a7b6e' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center}
button{font:inherit;font-weight:700;min-height:50px;padding:12px 24px;border:0;border-radius:12px;background:var(--accent);color:var(--on-accent);cursor:pointer;transition:background .15s,transform .05s}
button:hover{background:var(--strong)}
button:active{transform:translateY(1px)}

/* Result card. Empty, it is a quiet placeholder beside the form and hidden on a phone. */
#tool-result{background:var(--soft);border:1px solid var(--line);border-left:6px solid var(--accent);border-radius:16px;padding:24px;box-shadow:var(--shadow)}
#tool-result:empty{display:grid;place-items:center;min-height:11rem;background:transparent;border:2px dashed var(--line);box-shadow:none;color:var(--muted);text-align:center}
#tool-result:empty::before{content:"Your result will appear here";content:"Your result will appear here" / ""}
@media (max-width:55.99rem){#tool-result:empty{display:none}}
.headline{font:700 clamp(1.4rem,3.4vw,1.9rem)/1.25 var(--serif);color:var(--strong);margin:0 0 14px;overflow-wrap:anywhere}
dl{margin:0;display:grid;grid-template-columns:minmax(7rem,40%) 1fr;gap:0 20px}
dt,dd{padding:11px 0;border-top:1px solid color-mix(in srgb,var(--fg) 14%,transparent)}
dt{color:var(--muted)}
dd{margin:0;font-weight:650;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.error{color:var(--err);font-weight:600;margin:0}

/* Home page tool cards */
.cards{list-style:none;margin:28px 0 8px;padding:0;display:grid;gap:18px;grid-template-columns:minmax(0,1fr)}
@media (min-width:40rem){.cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
.cards a{display:flex;flex-direction:column;gap:6px;height:100%;padding:24px;background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);color:inherit;text-decoration:none;transition:transform .15s,border-color .15s}
.cards a::before{content:"";width:44px;height:44px;margin-bottom:8px;border-radius:12px;background:var(--soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23d9784a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='4' y='3' width='16' height='18' rx='3'/%3E%3Cpath d='M8 8h8M8 12h3M13 12h3M8 16h3M13 16h3'/%3E%3C/svg%3E") center/24px no-repeat}
.cards a:hover{transform:translateY(-2px);border-color:var(--accent)}
.cards strong{font:700 1.2rem/1.25 var(--serif)}
.cards span{flex:1;color:var(--muted)}
.cards a::after{margin-top:12px;font-weight:700;font-size:.94rem;color:var(--accent);content:"Open tool \2192";content:"Open tool \2192" / ""}

/* Reference tables. A table wider than the screen scrolls inside its own box (which can take keyboard focus). */
.chart{margin-top:30px}
.chart h2{margin:0 0 .7rem}
.table-wrap{overflow-x:auto;background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}
table{width:100%;min-width:48rem;border-collapse:collapse;font-size:.97rem}
tbody th,thead th:first-child{min-width:14rem}
th,td{padding:12px 14px;text-align:left;vertical-align:top;border-top:1px solid var(--line)}
thead th{border-top:0;background:var(--soft);color:var(--muted);font-size:.8rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase}
th.num,td.num{text-align:right;font-variant-numeric:tabular-nums}
td.num{white-space:nowrap}
tbody th{font-weight:650}
tbody tr:hover{background:color-mix(in srgb,var(--soft) 55%,transparent)}
.cell-note{display:block;margin-top:2px;font-size:.85rem;font-weight:400;color:var(--muted)}

/* Footer */
.site-footer{margin-top:56px;background:var(--surface);border-top:1px solid var(--line);color:var(--muted);font-size:.93rem}
.footer-inner{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 24px;padding-top:22px;padding-bottom:30px}
.footer-inner p{margin:0}
.site-footer nav{display:flex;flex-wrap:wrap;gap:0 20px}
.site-footer nav a{padding:8px 0;color:var(--muted)}
.site-footer nav a:hover{color:var(--strong)}

@media (max-width:40rem){
  .nav{flex-basis:100%;flex-wrap:nowrap;overflow-x:auto;margin:0 -8px;padding-bottom:2px;scrollbar-width:none}
  .nav::-webkit-scrollbar{display:none}
  .nav a{white-space:nowrap}
  #tool-form,#tool-result{padding:20px}
  .hero{padding-top:32px}
}
@media (max-width:30rem){dl{grid-template-columns:1fr}dt{padding-bottom:0}dd{padding-top:2px;border-top:0}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
@media print{
  .site-header,.site-footer,.skip,button{display:none}
  body{background:#fff;color:#000}
  .tool{display:block}
  #tool-form{border:0;box-shadow:none;padding:0}
  #tool-result{background:#fff;border:1px solid #888;box-shadow:none;break-inside:avoid}
  .headline{color:#000}
}