/* Theme A "Ford" for tirtha.ai marketing pages (Tom, 2026-10-02).
   Tokens recorded in memory/design/standards/web-design-tokens.md. Light by design: the page reads
   as a document or a receipt, and every color here is explicit so an OS dark setting cannot wash it out. */
:root{
  color-scheme: light;
  --bg:#FAFAF7; --surface:#FFFFFF; --border:#E4E2DA; --border2:#EFEDE6;
  --text:#15161A; --muted:#5D606B;
  --accent:#0B7A63; --accent-soft:#E6F2EE; --accent-line:#B9DACF;
  --ink:#15161A; --ink-hover:#2A2C33;
  --success:#15803D; --warning:#B45309; --danger:#B42318;
  --code:#0F1115; --code-line:#262A33; --code-text:#E6E8EC; --code-dim:#8B93A1;
  --code-key:#9CDCC8; --code-str:#E9C98B; --code-hi:rgba(11,122,99,.30);
  --sans:"IBM Plex Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --wrap:1160px; --r:12px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
html,body{overflow-x:hidden}
body{font-family:var(--sans);background:var(--bg);color:var(--text);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
img,svg{display:block;max-width:100%}
code,.mono{font-family:var(--mono);font-size:.92em}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 16px}
@media(min-width:760px){.wrap{padding:0 32px}}
h1,h2,h3{font-weight:600;letter-spacing:-.015em;line-height:1.15;text-wrap:balance}
h1{font-size:clamp(34px,5.2vw,56px);letter-spacing:-.025em;line-height:1.06}
h2{font-size:clamp(26px,3.4vw,38px)}
h3{font-size:19px}
.lede{font-size:clamp(17px,1.6vw,19px);color:var(--muted);max-width:56ch}
.eyebrow{font-family:var(--mono);font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);font-weight:500}
.sec{padding:72px 0;border-top:1px solid var(--border)}
@media(max-width:759px){.sec{padding:52px 0}}
.shead{max-width:64ch;margin-bottom:32px}
.shead h2{margin-top:10px}
.shead p{color:var(--muted);margin-top:12px}

/* buttons: ink primary, quiet secondary, both at least 48px tall */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 22px;border-radius:10px;
  font-family:var(--sans);font-size:16px;font-weight:600;text-decoration:none;cursor:pointer;border:1px solid transparent;
  background:var(--ink);color:#FFFFFF;transition:background .15s ease}
.btn:hover{background:var(--ink-hover)}
.btn.quiet{background:transparent;color:var(--text);border-color:var(--border)}
.btn.quiet:hover{background:var(--surface);border-color:#CFCCC1}
.btn.sm{min-height:44px;padding:0 16px;font-size:15px}
a:focus-visible,.btn:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}

/* nav */
.nav{position:sticky;top:0;z-index:30;background:rgba(250,250,247,.92);backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid var(--border)}
.nav .in{display:flex;align-items:center;gap:20px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;font-weight:600;font-size:19px;min-height:44px}
.brand svg{width:34px;height:20px;flex:none}
.brand .by{font-family:var(--mono);font-size:12px;color:var(--muted);font-weight:400}
.nav .links{display:flex;gap:4px;margin-left:12px}
.nav .links a,.nav .login{display:inline-flex;align-items:center;min-height:44px;padding:0 10px;color:var(--muted);text-decoration:none;font-size:15px;border-radius:8px}
.nav .links a:hover,.nav .login:hover{color:var(--text)}
.nav .links a[aria-current]{color:var(--text);font-weight:600}
.nav .r{margin-left:auto;display:flex;align-items:center;gap:6px}
.nav .row2{display:none}
@media(max-width:899px){
  .nav .links{display:none}
  .brand .by{display:none}
  .nav .row2{display:flex;gap:2px;overflow-x:auto;scrollbar-width:none;border-top:1px solid var(--border2);margin:0 -16px;padding:0 10px}
  .nav .row2::-webkit-scrollbar{display:none}
  .nav .row2 a{display:inline-flex;align-items:center;min-height:44px;padding:0 10px;color:var(--muted);text-decoration:none;font-size:15px;white-space:nowrap}
  .nav .row2 a[aria-current]{color:var(--text);font-weight:600}
}
@media(max-width:400px){.nav .login{padding:0 6px}.nav .btn.sm{padding:0 12px}}

/* logo swoop: CSS keyframes only */
.swoop{stroke-dasharray:120;stroke-dashoffset:120;animation:swoop 1.4s cubic-bezier(.16,1,.3,1) .1s forwards}
@keyframes swoop{to{stroke-dashoffset:0}}

/* cards, chips */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:24px}
.chip{display:inline-flex;align-items:center;gap:8px;min-height:36px;padding:0 12px;border:1px solid var(--border);border-radius:999px;background:var(--surface);font-size:14px;color:var(--muted)}
.chip b{color:var(--text);font-weight:600}
.badge{display:inline-flex;align-items:center;gap:6px;font-family:var(--mono);font-size:12.5px;font-weight:500;padding:3px 9px;border-radius:999px;background:var(--accent-soft);color:var(--accent);border:1px solid var(--accent-line)}
.badge.warn{background:#FBF1E6;color:var(--warning);border-color:#EBCFAE}
.badge.dim{background:#F1F0EC;color:var(--muted);border-color:var(--border)}
.more{display:inline-flex;align-items:center;min-height:44px;font-size:15px;font-weight:600;color:var(--accent);text-decoration:none}
.more:hover{text-decoration:underline}

/* code panel */
.code{min-width:0;max-width:100%;background:var(--code);border-radius:var(--r);border:1px solid #1E2128;overflow:hidden;color:var(--code-text);box-shadow:0 24px 60px -30px rgba(21,22,26,.45)}
.code .bar{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 14px;border-bottom:1px solid var(--code-line);font-family:var(--mono);font-size:12.5px;color:var(--code-dim)}
.code .bar b{color:var(--code-text);font-weight:500}
.code pre{margin:0;padding:16px;overflow-x:auto;font-family:var(--mono);font-size:13.5px;line-height:1.7;white-space:pre}
.code .k{color:var(--code-key)} .code .s{color:var(--code-str)} .code .c{color:var(--code-dim)} .code .t{color:#7FD6B2}
.code .hl{display:inline-block;background:var(--code-hi);border-radius:4px;padding:0 4px;margin:0 -4px;outline:1px solid rgba(127,214,178,.45)}
.code .old{color:#F19A8E;text-decoration:line-through;text-decoration-color:rgba(241,154,142,.6)}
.code .new{color:#7FD6B2}
.copybtn{font-family:var(--mono);font-size:12.5px;color:var(--code-text);background:transparent;border:1px solid var(--code-line);border-radius:7px;min-height:44px;padding:0 14px;cursor:pointer}
.copybtn:hover{border-color:#4A505C}

/* footer */
.foot{border-top:1px solid var(--border);padding:48px 0 32px;background:var(--surface)}
.foot .cols{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
@media(max-width:759px){.foot .cols{grid-template-columns:1fr 1fr;gap:20px 16px}}
.foot h4{font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:500;margin-bottom:6px}
.foot ul{list-style:none}
.foot li a{display:inline-flex;align-items:center;min-height:44px;color:var(--text);text-decoration:none;font-size:15px}
.foot li a:hover{color:var(--accent)}
.foot .base{display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;margin-top:32px;padding-top:20px;border-top:1px solid var(--border2);font-size:14px;color:var(--muted)}

/* faq */
.faq{display:grid;gap:10px;max-width:820px}
.faq details{background:var(--surface);border:1px solid var(--border);border-radius:var(--r)}
.faq summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:56px;padding:12px 20px;font-weight:600;font-size:17px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--mono);font-size:20px;color:var(--muted);flex:none}
.faq details[open] summary::after{content:"\2212"}
.faq .a{padding:0 20px 18px;color:var(--muted)}
.faq .a p+p{margin-top:10px}

/* bands */
.band{background:var(--ink);color:#F4F4F1;border-radius:16px;padding:40px 32px;display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between}
@media(max-width:759px){.band{padding:32px 20px}}
.band h2{color:#FFFFFF}
.band p{color:#B9BCC5;margin-top:8px;max-width:52ch}
.band .btn{background:#FFFFFF;color:var(--ink)}
.band .btn:hover{background:#ECEBE6}
.band .btn.quiet{background:transparent;color:#FFFFFF;border-color:#3A3D46}
.band .btn.quiet:hover{border-color:#6A6E79}
.micro{font-size:14.5px;color:var(--muted);margin-top:14px}
.micro b{color:var(--text);font-weight:600}

@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.swoop{animation:none;stroke-dashoffset:0}}

/* brand mark: the Tīrtha fire logo (brand-mark.png, cropped from tirtha-mark.png) in its own dark tile.
   The source art is a glow on near black with a dark halo, so it is shown as a tile rather than cut out
   onto the light canvas, where the halo reads as a grey smudge. One size on every page. */
.brand .mk{width:36px;height:36px;border-radius:9px;flex:none;display:block;object-fit:cover;background:#0D0D0D}

/* long-form pages (docs, reference, security, legal): a page head plus a .prose column */
.phead{padding:56px 0 28px;max-width:72ch}
@media(max-width:759px){.phead{padding:40px 0 20px}}
.phead h1{margin-top:12px}
.phead .lede{margin-top:16px}
h1 em,h2 em{font-style:normal;color:var(--muted)}
.prose{max-width:780px;padding-bottom:72px}
.prose h2{font-size:clamp(22px,2.6vw,28px);margin:48px 0 12px}
.prose h3{margin:28px 0 8px}
.prose p{margin:0 0 14px}
.prose ul,.prose ol{margin:0 0 16px;padding-left:22px}
.prose li{margin:0 0 10px}
.prose li::marker{color:var(--muted)}
.prose strong,.prose b{font-weight:600;color:var(--text)}
.prose a{text-underline-offset:2px}
.muted{color:var(--muted)}
.prose code,.inline-code{font-family:var(--mono);background:#F1F0EC;border:1px solid var(--border2);border-radius:5px;padding:1px 5px;font-size:.86em;color:var(--text);overflow-wrap:anywhere}
.rule{height:1px;background:var(--border);border:0;margin:36px 0}
.pnote{font-size:15px;color:var(--muted);margin-top:40px;padding-top:18px;border-top:1px solid var(--border)}
.grid2{display:grid;grid-template-columns:1fr;gap:16px;margin:16px 0}
@media(min-width:700px){.grid2{grid-template-columns:1fr 1fr}}
.grid2>*{min-width:0}
.card h3{font-size:17px;margin:0 0 8px}
.card p{color:var(--muted);font-size:15.5px}
a.card{display:block;text-decoration:none;color:var(--text);transition:border-color .15s ease}
a.card:hover{border-color:var(--accent-line)}
a.card .arw{color:var(--accent)}
.status-now{color:var(--success);font-weight:600}
.status-soon{color:var(--muted);font-weight:600}

/* tables */
.tblwrap{max-width:100%;overflow-x:auto;margin-top:18px;border:1px solid var(--border);border-radius:var(--r);background:var(--surface)}
.tbl{width:100%;border-collapse:collapse;font-size:15px}
.tbl th,.tbl td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--border2);vertical-align:top}
.tbl tr:last-child td{border-bottom:0}
.tbl th{font-family:var(--mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);font-weight:500;background:#F6F5F1}
.tbl td:first-child{font-weight:600}
.tbl code{font-family:var(--mono);font-size:.88em;color:var(--accent)}
.tbl .yes{color:var(--success);font-weight:600}
.tbl .no{color:var(--muted)}
.tbl .soon{color:var(--warning);font-weight:600}
.tbl td:first-child code{white-space:nowrap}
@media(max-width:699px){.tbl{min-width:640px;font-size:14.5px}}

/* a plain code block (no title bar) */
.codeblock{background:var(--code);color:var(--code-text);border:1px solid #1E2128;border-radius:var(--r);padding:16px 18px;margin-top:16px;
  font-family:var(--mono);font-size:13.5px;line-height:1.7;white-space:pre;overflow-x:auto;max-width:100%}
.codeblock .m,.codeblock .muted{color:var(--code-dim)}
.codeblock .k{color:var(--code-key)}
.codeblock .v{color:var(--code-str)}
@media(max-width:480px){.codeblock{font-size:12px;padding:14px 12px}}

/* forms */
.field-label{display:block;font-size:14px;font-weight:600;color:var(--text);margin:18px 0 6px}
.field-label .opt{color:var(--muted);font-weight:400}
.input{width:100%;background:var(--surface);border:1px solid #CFCCC1;border-radius:10px;color:var(--text);padding:11px 12px;min-height:48px;
  font:15px/1.5 var(--sans)}
textarea.input{resize:vertical}
.input.mono{font-family:var(--mono);font-size:14px}
.input:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}

/* grid items holding code must be allowed to shrink, or a long line widens the page */
.hgrid>*,.see>*,.oneline>*,.sbs>*,.stats>*{min-width:0}
@media(max-width:480px){.code pre{font-size:12px;padding:14px 12px}}