:root{--ink:#12151a;--muted:#5c6672;--line:#e3e7ec;--bg:#fff;--surface:#f7f9fb;--accent:#1a5cff}
*{box-sizing:border-box}
body{margin:0;font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
header{border-bottom:1px solid var(--line);padding:14px 20px;display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.brand{font-weight:800;text-decoration:none;color:var(--ink);font-size:17px}
nav{margin-left:auto;display:flex;gap:18px;flex-wrap:wrap}
nav a{text-decoration:none;color:var(--muted);font-size:15px}
nav a:hover{color:var(--accent)}
main{max-width:820px;margin:0 auto;padding:26px 20px 60px}
h1{font-size:32px;line-height:1.2;margin:6px 0 10px}
h2{font-size:21px;margin:34px 0 10px}
.crumb{color:var(--muted);font-size:14px;margin:0 0 8px}
.crumb a{color:var(--muted)}
.lede{font-size:17.5px;color:#2b323b;margin:0 0 18px}
a{color:var(--accent)}
.tool{border:1px solid var(--line);border-radius:14px;padding:20px;background:var(--surface);margin:18px 0 8px}
.out{min-height:96px;display:flex;align-items:center;justify-content:center;text-align:center;background:#fff;border:1px solid var(--line);border-radius:10px;padding:18px}
.out .hint{color:var(--muted);margin:0}
.out.on{display:block;text-align:left}
.pick{font-size:27px;font-weight:800;margin:0 0 10px;line-height:1.25}
.out dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:4px 14px;font-size:15px}
.out dt{color:var(--muted)}
.out dd{margin:0}
.controls{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin-top:14px}
button{background:var(--accent);color:#fff;border:0;border-radius:9px;padding:12px 22px;font-size:16px;font-weight:700;cursor:pointer}
button:hover{filter:brightness(1.08)}
.norepeat{font-size:14px;color:var(--muted);display:flex;gap:6px;align-items:center}
.count{color:var(--muted);font-size:14px;margin:10px 0 0}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px}
table{border-collapse:collapse;width:100%;font-size:15px}
th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line)}
th{background:var(--surface);font-weight:700;white-space:nowrap}
tr:last-child td{border-bottom:0}
.note{color:var(--muted);font-size:14.5px}
details{border-bottom:1px solid var(--line);padding:13px 0}
details summary{cursor:pointer;font-weight:600}
details p{margin:9px 0 0;color:#2b323b}
details.method{border-top:1px solid var(--line);margin:26px 0}
details.method summary{list-style:none}
details.method summary::-webkit-details-marker{display:none}
details.method summary::after{content:" ▸";color:var(--muted)}
details.method[open] summary::after{content:" ▾"}
.sources{margin-top:12px;padding-top:12px;border-top:1px dashed var(--line);color:var(--muted);font-size:14.5px}
.cards{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}
.cards a{display:block;border:1px solid var(--line);border-radius:12px;padding:14px;text-decoration:none;color:var(--ink);height:100%}
.cards a:hover{border-color:var(--accent)}
.cards strong{display:block;margin-bottom:4px}
.cards span{display:block;color:var(--muted);font-size:14.5px}
.cards em{display:block;color:var(--muted);font-size:13px;font-style:normal;margin-top:7px}
.rel{padding-left:18px}
footer{border-top:1px solid var(--line);padding:20px;max-width:820px;margin:0 auto;font-size:14.5px}
footer p{margin:6px 0}
.dim{color:var(--muted)}
@media(max-width:560px){h1{font-size:26px}main{padding:18px 16px 46px}nav{margin-left:0;gap:14px}}
.controls.dates{flex-wrap:wrap;gap:.75rem;align-items:end}
.controls.dates .fld{display:flex;flex-direction:column;gap:.25rem;font-size:.85rem;color:var(--muted)}
.controls.dates input[type=date]{font:inherit;padding:.45rem .5rem;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--ink)}
/* Periodic table — drawn from the same data the generator picks from. */
.ptwrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:10px 0 6px;padding-bottom:6px}
.pt{display:grid;grid-template-columns:repeat(18,minmax(30px,1fr));grid-template-rows:repeat(7,auto) 10px repeat(2,auto);gap:3px;min-width:600px}
.el{position:relative;display:flex;flex-direction:column;justify-content:center;align-items:center;border:1px solid rgba(0,0,0,.10);border-radius:4px;padding:4px 1px 3px;font-weight:400;line-height:1;cursor:default}
.el i{font-style:normal;font-size:8.5px;color:var(--muted);align-self:flex-start;margin:0 0 1px 3px}
.el s{text-decoration:none;font-size:14px;font-weight:700}
.el.gap{background:none;border:1px dashed var(--line);color:var(--muted);font-size:9.5px;justify-content:center}
.el.lit{outline:3px solid var(--accent);outline-offset:1px;box-shadow:0 0 0 6px rgba(26,92,255,.14);z-index:2}
.f0{background:#ffe2e2}.f1{background:#ffeccd}.f2{background:#fff6c2}.f3{background:#e6f2d4}
.f4{background:#d6f0ea}.f5{background:#d7e9ff}.f6{background:#e8ddff}.f7{background:#ffe0f2}
.f8{background:#f6ddd0}.f9{background:#eceff3}
.legend{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:13px;color:var(--muted);margin:6px 0 4px}
.lg{display:flex;align-items:center;gap:5px}
.lg i{width:12px;height:12px;border-radius:3px;border:1px solid rgba(0,0,0,.10);display:inline-block}
@media(max-width:560px){.pt{gap:2px}.el s{font-size:12px}}
/* Our own marks, and swatches drawn from the colour data. */
.ico{width:1.05em;height:1.05em;flex:none;color:var(--accent);vertical-align:-.12em}
h1.withico{display:flex;align-items:center;gap:.45em}
h1.withico .ico{width:.82em;height:.82em}
.cards strong{display:flex;align-items:center;gap:.5em}
.sws{display:inline-flex;gap:3px;margin-right:7px;vertical-align:-.15em}
.sw{width:11px;height:11px;border-radius:3px;border:1px solid rgba(0,0,0,.22);display:inline-block}
.flag{width:34px;height:22.7px;flex:none;margin-right:9px;vertical-align:-.42em;border-radius:1.5px}
.out .pick .flag{width:66px;height:44px;vertical-align:-.3em;margin-right:12px}
table td:first-child{white-space:normal}