/* Copyright 2026 Sreeram Anil — SPDX-License-Identifier: CC-BY-4.0 */
:root{
  color-scheme:light dark;
  --surface-0:#f4f4f1; --surface-1:#fcfcfb; --surface-2:#ffffff; --border:#e2e1db; --border-strong:#cbcac2;
  --text-primary:#0b0b0b; --text-secondary:#52514e; --text-muted:#82817b;
  --accent:#2a78d6; --accent-ink:#1d5fb0;
  --s1:#2a78d6; --s2:#eb6834; --s3:#1baf7a; --s4:#eda100; --s5:#e87ba4; --s6:#008300; --s7:#4a3aa7; --s8:#e34948;
  --good:#1a7f4b; --warn:#c98500; --bad:#c0392b;
  --seq0:#f2f7fd; --seq1:#d3e4f7; --seq2:#9cc4ee; --seq3:#5b98dd; --seq4:#2a78d6; --seq5:#1a4e8f; --seq6:#0f2f57;
  --mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --sans:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --maxw:1180px;
}
:root[data-theme="dark"], :root:where(:not([data-theme="light"])){}
@media (prefers-color-scheme:dark){:root:where(:not([data-theme="light"])){
  --surface-0:#121211; --surface-1:#1a1a19; --surface-2:#222220; --border:#33322e; --border-strong:#45443f;
  --text-primary:#f4f4f0; --text-secondary:#c3c2b7; --text-muted:#8f8e85;
  --accent:#3987e5; --accent-ink:#6ea8ee;
  --s1:#3987e5; --s2:#d95926; --s3:#199e70; --s4:#c98500; --s5:#d55181; --s6:#3aa53a; --s7:#9085e9; --s8:#e66767;
  --good:#3fae72; --warn:#e0a838; --bad:#e66767;
  --seq0:#15233a; --seq1:#1c3a63; --seq2:#245089; --seq3:#2f6bb4; --seq4:#4a8ee0; --seq5:#8fbcf0; --seq6:#cfe2fa;
}}
:root[data-theme="dark"]{
  --surface-0:#121211; --surface-1:#1a1a19; --surface-2:#222220; --border:#33322e; --border-strong:#45443f;
  --text-primary:#f4f4f0; --text-secondary:#c3c2b7; --text-muted:#8f8e85;
  --accent:#3987e5; --accent-ink:#6ea8ee;
  --s1:#3987e5; --s2:#d95926; --s3:#199e70; --s4:#c98500; --s5:#d55181; --s6:#3aa53a; --s7:#9085e9; --s8:#e66767;
  --good:#3fae72; --warn:#e0a838; --bad:#e66767;
  --seq0:#15233a; --seq1:#1c3a63; --seq2:#245089; --seq3:#2f6bb4; --seq4:#4a8ee0; --seq5:#8fbcf0; --seq6:#cfe2fa;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--surface-0);color:var(--text-primary);font-family:var(--sans);line-height:1.55;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--accent-ink);text-decoration:none}
a:hover{text-decoration:underline}
code,kbd{font-family:var(--mono);font-size:.9em}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
h1,h2,h3{line-height:1.2;font-weight:650}
h2{font-size:1.55rem;margin:2.6rem 0 1rem;letter-spacing:-.01em}
h3{font-size:1.15rem;margin:1.8rem 0 .6rem}
.muted{color:var(--text-muted)}
.sec{color:var(--text-secondary)}

/* header */
header.top{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--surface-1) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
header.top .wrap{display:flex;align-items:center;gap:22px;height:58px}
.brand{font-weight:750;font-size:1.15rem;letter-spacing:-.02em;display:flex;align-items:center;gap:9px}
.brand .dot{width:11px;height:11px;border-radius:3px;background:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 22%,transparent)}
nav.main{display:flex;gap:20px;margin-left:auto;align-items:center;font-size:.94rem}
nav.main a{color:var(--text-secondary);font-weight:520}
nav.main a:hover,nav.main a.active{color:var(--text-primary);text-decoration:none}
.theme-btn{background:none;border:1px solid var(--border-strong);border-radius:8px;color:var(--text-secondary);cursor:pointer;padding:5px 9px;font-size:.85rem}
.gh{border:1px solid var(--border-strong);border-radius:8px;padding:5px 11px;color:var(--text-primary);font-weight:560}

/* hero */
.hero{padding:64px 0 30px;border-bottom:1px solid var(--border)}
.hero .eyebrow{color:var(--accent-ink);font-weight:640;font-size:.82rem;letter-spacing:.12em;text-transform:uppercase}
.hero h1{font-size:2.9rem;letter-spacing:-.025em;margin:.5rem 0 .4rem;max-width:16ch}
.hero .lede{font-size:1.24rem;color:var(--text-secondary);max-width:60ch;margin:0 0 1.6rem}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:11px 20px;border-radius:10px;font-weight:600;font-size:.98rem;border:1px solid transparent;cursor:pointer}
.btn.primary{background:var(--accent);color:#fff}
.btn.primary:hover{background:var(--accent-ink);text-decoration:none}
.btn.ghost{border-color:var(--border-strong);color:var(--text-primary)}
.btn.ghost:hover{text-decoration:none;border-color:var(--accent)}

/* stat tiles */
.tiles{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:34px 0}
.tile{background:var(--surface-1);border:1px solid var(--border);border-radius:14px;padding:18px 18px 16px}
.tile .n{font-size:2.15rem;font-weight:730;letter-spacing:-.03em;font-variant-numeric:tabular-nums;line-height:1}
.tile .l{color:var(--text-secondary);font-size:.9rem;margin-top:7px}
.tile .s{color:var(--text-muted);font-size:.78rem;margin-top:3px}
.tile.accent{border-color:color-mix(in srgb,var(--accent) 40%,var(--border))}
.tile.accent .n{color:var(--accent-ink)}

/* cards / panels */
.panel{background:var(--surface-1);border:1px solid var(--border);border-radius:14px;padding:22px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
figure{margin:0}
figure img{width:100%;height:auto;border:1px solid var(--border);border-radius:10px;background:var(--surface-2)}
figcaption{color:var(--text-muted);font-size:.85rem;margin-top:8px}
.imgframe{background:var(--surface-2);border:1px solid var(--border);border-radius:12px;padding:10px}
.imgframe img{border:none;border-radius:6px;display:block}

/* code */
pre{background:var(--surface-2);border:1px solid var(--border);border-radius:12px;padding:16px 18px;overflow:auto;font-family:var(--mono);font-size:.85rem;line-height:1.5}
pre .kw{color:var(--s7)}pre .ty{color:var(--s3)}pre .cm{color:var(--text-muted);font-style:italic}pre .st{color:var(--s2)}pre .fn{color:var(--accent-ink)}

/* family chips */
.chip{display:inline-flex;align-items:center;gap:7px;padding:4px 11px;border-radius:999px;border:1px solid var(--border-strong);font-size:.84rem;color:var(--text-secondary);background:var(--surface-1);cursor:pointer;user-select:none}
.chip .sw{width:9px;height:9px;border-radius:2px}
.chip.on{color:var(--text-primary);border-color:var(--accent);background:color-mix(in srgb,var(--accent) 10%,var(--surface-1))}

/* tables */
table.data{width:100%;border-collapse:collapse;font-size:.88rem;font-variant-numeric:tabular-nums}
table.data th,table.data td{padding:7px 10px;text-align:right;border-bottom:1px solid var(--border)}
table.data th:first-child,table.data td:first-child{text-align:left}
table.data thead th{color:var(--text-secondary);font-weight:600;cursor:pointer;position:sticky;top:58px;background:var(--surface-1);white-space:nowrap}
table.data tbody tr:hover{background:color-mix(in srgb,var(--accent) 6%,transparent)}
.tablewrap{overflow-x:auto;border:1px solid var(--border);border-radius:12px}
td.cell{color:#0b0b0b;font-weight:560;text-align:center;border-radius:0}
.name-link{font-weight:600}
.tag{display:inline-block;font-size:.72rem;padding:1px 7px;border-radius:6px;background:var(--surface-2);border:1px solid var(--border);color:var(--text-secondary);font-family:var(--mono)}

/* footer */
footer{border-top:1px solid var(--border);margin-top:60px;padding:34px 0;color:var(--text-muted);font-size:.88rem}
footer a{color:var(--text-secondary)}
.controls{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:14px 0 18px}
.controls input[type=search]{flex:1;min-width:200px;padding:9px 12px;border:1px solid var(--border-strong);border-radius:9px;background:var(--surface-2);color:var(--text-primary);font-size:.92rem}
.seg{display:flex;border:1px solid var(--border-strong);border-radius:9px;overflow:hidden}
.seg button{background:var(--surface-2);border:none;color:var(--text-secondary);padding:8px 13px;cursor:pointer;font-size:.86rem}
.seg button.on{background:var(--accent);color:#fff}
.legend-seq{display:flex;align-items:center;gap:6px;font-size:.8rem;color:var(--text-muted)}
.legend-seq .bar{display:flex}.legend-seq .bar span{width:16px;height:12px}
.bignum{font-variant-numeric:tabular-nums}
.kbadge{display:inline-flex;gap:6px;align-items:center;font-size:.8rem;color:var(--text-secondary);border:1px solid var(--border);border-radius:7px;padding:3px 8px;background:var(--surface-1)}
.rule{height:1px;background:var(--border);margin:26px 0}
ul.clean{list-style:none;padding:0;margin:0}
ul.clean li{padding:7px 0;border-bottom:1px solid var(--border)}
@media(max-width:820px){.tiles{grid-template-columns:repeat(2,1fr)}.grid2,.grid3{grid-template-columns:1fr}.hero h1{font-size:2.1rem}nav.main a:not(.gh){display:none}}