:root{
  --bg:#F3F2EE; --surface:#FFFFFF; --ink:#16191C; --muted:#4A4F54; --line:#D9D6CF;
  --orange:#FFA916; --blue:#0B6FA4; --bar:#000000; --barink:#F3F2EE; --row:#F7F6F2; --err:#B3261E;
  --display:'Archivo',Arial,sans-serif; --body:'IBM Plex Sans',Calibri,Arial,sans-serif; --mono:'IBM Plex Mono',Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0E1012; --surface:#181B1E; --ink:#ECEBE7; --muted:#A9ADB1; --line:#2E3337; --blue:#3AB6FF; --row:#1F2326; --err:#FF8A80; color-scheme:dark}}
:root[data-theme="dark"]{--bg:#0E1012; --surface:#181B1E; --ink:#ECEBE7; --muted:#A9ADB1; --line:#2E3337; --blue:#3AB6FF; --row:#1F2326; --err:#FF8A80; color-scheme:dark}
body{margin:0;background:var(--bg); color:var(--ink); font-family:var(--body); font-size:16px; line-height:1.5}
.wrap{max-width:820px; margin:0 auto; padding-left:max(16px,env(safe-area-inset-left,0px)); padding-right:max(16px,env(safe-area-inset-right,0px))}
header{background:var(--bar); color:var(--barink)}
header .wrap{padding-block:18px; display:flex; flex-wrap:wrap; align-items:baseline; justify-content:space-between; gap:8px 16px}
.brand{font-family:var(--display); font-weight:800; letter-spacing:.02em; font-size:20px}
.brand span{color:var(--orange)}
.tag{font-family:var(--mono); font-size:12px; letter-spacing:.08em; color:#B9BCBF; text-transform:uppercase}
main .wrap{padding-block:24px 48px; display:flex; flex-direction:column; gap:20px}
h1{font-family:var(--display); font-weight:800; font-size:clamp(26px,6vw,36px); line-height:1.1; margin:0; text-wrap:balance}
.lede{margin:6px 0 0; color:var(--muted); max-width:62ch}
.tabs{display:grid; grid-template-columns:1fr 1fr; gap:0; border:2px solid var(--ink)}
.tabs button{font:inherit; font-family:var(--display); font-weight:600; font-size:17px; padding:14px 10px; min-height:52px; border:0; background:var(--surface); color:var(--ink); cursor:pointer}
.tabs button[aria-selected="true"]{background:var(--ink); color:var(--bg)}
.tabs button:focus-visible,input:focus-visible,select:focus-visible,.copy:focus-visible{outline:3px solid var(--orange); outline-offset:2px}
.card{background:var(--surface); border:1px solid var(--line); padding:20px}
.card h2{font-family:var(--display); font-weight:600; font-size:20px; margin:0 0 14px}
.fields{display:grid; grid-template-columns:repeat(auto-fit,minmax(180px,1fr)); gap:14px}
.field{display:flex; flex-direction:column; gap:6px; min-width:0}
.field label{font-size:14px; font-weight:600}
.field small{font-size:13px; color:var(--muted)}
input,select{font:inherit; font-family:var(--mono); font-size:20px; padding:10px 12px; min-height:52px; border:2px solid var(--line); background:var(--bg); color:var(--ink); width:100%; box-sizing:border-box}
select{font-family:var(--body); font-size:16px}
.err{color:var(--err); font-size:14px; min-height:1.2em; margin-top:8px}
.ref{font-size:14px; color:var(--muted); margin:12px 0 0; max-width:66ch}
.pick{border:1px solid var(--line); background:var(--bg)}
.pick summary{cursor:pointer; font-size:14px; font-weight:600; padding:12px; min-height:44px; box-sizing:border-box; list-style:none}
.pick summary::-webkit-details-marker{display:none}
.pick summary::after{content:' ▾'; color:var(--muted)}
.pick[open] summary::after{content:' ▴'}
.pick summary:focus-visible,.optbtn:focus-visible{outline:3px solid var(--orange); outline-offset:-3px}
.optlist{max-height:340px; overflow-y:auto; border-top:1px solid var(--line)}
.optbtn{display:grid; grid-template-columns:5.2em 1fr; gap:4px 10px; width:100%; text-align:left; font:inherit; font-size:14px; padding:10px 12px; min-height:44px; border:0; border-bottom:1px solid var(--line); background:transparent; color:var(--ink); cursor:pointer}
.optbtn:hover,.optbtn[aria-current="true"]{background:var(--row)}
.optbtn .od{font-family:var(--mono); font-weight:600; font-variant-numeric:tabular-nums}
.optbtn .sz{min-width:0; overflow-wrap:anywhere; color:var(--muted)}
.sz strong,.match strong{color:var(--ink); font-weight:700}
.match{min-height:1.2em; overflow-wrap:anywhere}
.match b{color:var(--ink); font-weight:600}
.ref a{color:var(--blue)}
.summary{display:grid; grid-template-columns:repeat(auto-fit,minmax(150px,1fr)); gap:12px 20px; margin-bottom:18px}
.stat{display:flex; flex-direction:column}
.stat b{font-family:var(--mono); font-size:22px; font-variant-numeric:tabular-nums}
.stat span{font-size:13px; color:var(--muted)}
.tablebox{overflow-x:auto}
table{width:100%; border-collapse:collapse; font-variant-numeric:tabular-nums}
th{font-size:12px; letter-spacing:.06em; text-transform:uppercase; color:var(--muted); text-align:left; padding:8px 10px; border-bottom:2px solid var(--ink)}
td{padding:12px 10px; border-bottom:1px solid var(--line); font-family:var(--mono)}
tbody tr:nth-child(even) td{background:var(--row)}
td.st{font-family:var(--display); font-weight:800; font-size:20px; width:56px}
td.frac{font-size:22px; font-weight:600}
td.dec,td.ang{color:var(--muted)}
tr.lap td.st{color:var(--orange)}
.note{font-size:14px; color:var(--muted); margin:10px 0 0; max-width:66ch}
canvas{width:100%; height:auto; display:block; border:1px solid var(--line); background:var(--bg)}
.seq{font-family:var(--mono); font-size:15px; overflow-wrap:anywhere; margin:10px 0 0}
.copy{font:inherit; font-size:14px; font-weight:600; padding:8px 12px; min-height:44px; border:2px solid var(--ink); background:transparent; color:var(--ink); cursor:pointer}
.row{display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:10px; margin-bottom:12px}
.row h2{margin:0}
footer .wrap{padding-block:0 32px; font-size:13px; color:var(--muted)}
.fgnav{background:var(--bar);border-top:1px solid #2A2D30}
.fgnav .wrap{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
.fgnav a{flex:none;font-family:var(--display);font-weight:600;font-size:15px;color:#B9BCBF;text-decoration:none;padding:12px 12px 10px;border-bottom:3px solid transparent;min-height:44px;box-sizing:border-box;display:flex;align-items:center}
.fgnav a[aria-current="page"]{color:var(--barink);border-bottom-color:var(--orange)}
.fgnav a:hover{color:var(--barink)}
.fgnav a:focus-visible{outline:3px solid var(--orange);outline-offset:-3px}
.tabs.lt{grid-template-columns:repeat(auto-fit,minmax(105px,1fr))}
.tabs.lt a,.tabs.lt button{font-size:15px;padding:12px 6px;line-height:1.2}
.tabs a{font-family:var(--display);font-weight:600;font-size:17px;padding:14px 10px;min-height:52px;box-sizing:border-box;display:flex;align-items:center;justify-content:center;text-align:center;background:var(--surface);color:var(--ink);text-decoration:none}
.tabs a[aria-current="page"]{background:var(--ink);color:var(--bg)}
.tabs a:focus-visible{outline:3px solid var(--orange);outline-offset:2px}
.lbl{font-size:14px;font-weight:600}
.warn{border-left:4px solid var(--orange);background:var(--row);padding:12px 14px;font-size:15px;margin:16px 0 0}
.warn:empty{display:none}
ol.steps{margin:0;padding-left:22px;display:flex;flex-direction:column;gap:10px;max-width:66ch}
ol.steps li::marker{font-family:var(--display);font-weight:800}
.ref a{color:var(--blue)}
td.st small{display:block;font-family:var(--body);font-weight:400;font-size:11px;color:var(--muted);letter-spacing:.04em;text-transform:uppercase}
#lnav{display:flex;flex-direction:column;gap:10px}
.lgroups{display:flex;flex-wrap:wrap;gap:6px}
.lgroups a{flex:none;font-family:var(--display);font-weight:600;font-size:14px;letter-spacing:.02em;padding:9px 14px;min-height:40px;box-sizing:border-box;display:flex;align-items:center;border:2px solid var(--line);color:var(--muted);text-decoration:none;background:var(--surface)}
.lgroups a[aria-current="true"]{border-color:var(--orange);color:var(--ink)}
.lgroups a:focus-visible{outline:3px solid var(--orange);outline-offset:2px}
.tabs a[aria-selected="true"]{background:var(--ink);color:var(--bg)}
.seg{display:flex;flex-wrap:wrap;gap:8px}
.seg button{font:inherit;font-weight:600;font-size:15px;padding:10px 14px;min-height:48px;border:2px solid var(--line);background:var(--bg);color:var(--ink);cursor:pointer;flex:1 1 0}
.seg button[aria-pressed="true"]{border-color:var(--ink);background:var(--ink);color:var(--bg)}
.seg button:focus-visible{outline:3px solid var(--orange);outline-offset:2px}