:root{
  --ground:#EAEDE6;--surface:#FAFBF7;--surface-2:#F1F3EC;
  --ink:#171B20;--ink-soft:#4B5159;--ink-faint:#6A7076;--line:#D4D9CE;
  --accent:#1E5A4C;--accent-soft:#2C7A66;--brass:#977B3E;--on-accent:#fff;--err:#A3402E;
  --radius:14px;
  color-scheme:light dark;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --ground:#0E1217;--surface:#151A21;--surface-2:#1B212A;
    --ink:#E7EBE4;--ink-soft:#A0A8A3;--ink-faint:#8A928F;--line:#262D36;
    --accent:#5BBFA3;--accent-soft:#7FD8BF;--brass:#C7A662;--on-accent:#08130F;--err:#E59A88;
  }
}
:root[data-theme="dark"]{
  --ground:#0E1217;--surface:#151A21;--surface-2:#1B212A;
  --ink:#E7EBE4;--ink-soft:#A0A8A3;--ink-faint:#8A928F;--line:#262D36;
  --accent:#5BBFA3;--accent-soft:#7FD8BF;--brass:#C7A662;--on-accent:#08130F;--err:#E59A88;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{
  margin:0;background:var(--ground);color:var(--ink);
  font-family:"Public Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:1.0625rem;line-height:1.6;-webkit-font-smoothing:antialiased;
}
.wrap{max-width:760px;margin-inline:auto;padding-inline:16px}
@media(min-width:560px){.wrap{padding-inline:22px}}
h1,h2,h3{font-family:"Spectral",Georgia,serif;font-weight:600;text-wrap:balance;line-height:1.12;letter-spacing:-.01em}
p{margin:0}
a{color:inherit}
[hidden]{display:none!important}

.eyebrow{font-family:"IBM Plex Mono",ui-monospace,monospace;font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--accent-soft);font-weight:500}

header.bar{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--ground) 86%,transparent);backdrop-filter:saturate(1.2) blur(8px);border-bottom:1px solid var(--line)}
.bar-in{max-width:760px;margin-inline:auto;padding:12px 16px;display:flex;align-items:center;gap:14px}
@media(min-width:560px){.bar-in{padding-inline:22px}}
.brand{font-family:"Spectral",serif;font-weight:700;font-size:1.18rem;letter-spacing:-.01em;display:flex;align-items:center;gap:9px}
.brand .dot{width:9px;height:9px;border-radius:3px;background:var(--accent);display:inline-block;transform:rotate(45deg)}
.brand small{font-family:"IBM Plex Mono",monospace;font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-faint);font-weight:400}
.spacer{flex:1}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:inherit;font-weight:600;font-size:.95rem;padding:11px 18px;border-radius:10px;border:1px solid transparent;cursor:pointer;text-decoration:none;transition:transform .12s ease,background .15s ease,border-color .15s ease}
.btn-primary{background:var(--accent);color:var(--on-accent)}
.btn-primary:hover{background:var(--accent-soft)}
.btn-primary[disabled]{opacity:.6;cursor:progress}
.btn-ghost{border-color:var(--line);color:var(--ink);background:transparent}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn:active{transform:translateY(1px)}
.bar .btn{padding:8px 14px;font-size:.88rem}

.hero{padding-block:52px 34px}
.hero .eyebrow{display:block;margin-bottom:18px}
.hero h1{font-size:clamp(2rem,7.2vw,3.2rem);margin:0 0 20px}
.hero .lede{font-size:1.14rem;color:var(--ink-soft);max-width:40ch}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:28px}
.chip{font-family:"IBM Plex Mono",monospace;font-size:.74rem;color:var(--ink-soft);background:var(--surface);border:1px solid var(--line);padding:6px 11px;border-radius:999px;display:inline-flex;align-items:center;gap:7px}
.chip .tick{width:6px;height:6px;border-radius:50%;background:var(--accent);flex:none}

section{padding-block:44px}
section.tight{padding-block:8px}
.kicker{margin-bottom:22px}
.kicker h2{font-size:clamp(1.5rem,4.5vw,2rem);margin:10px 0 0}

.vault{--v-bg:#10231E;--v-ink:#EAF2ED;--v-soft:#9CC3B7;--v-acc:#7FD8BF;--v-line:rgba(234,242,237,.16);background:var(--v-bg);color:var(--v-ink);border-radius:20px;padding:34px 22px;box-shadow:0 24px 60px -34px rgba(6,26,20,.7)}
@media(min-width:560px){.vault{padding:38px 28px}}
.vault .eyebrow{color:var(--v-acc)}
.vault h2{color:var(--v-ink);font-size:clamp(1.5rem,4.5vw,2rem);margin:10px 0 18px}
.vault .diagram{width:100%;height:auto;display:block;margin:4px 0 22px}
.vault ul{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.vault li{display:flex;gap:13px;align-items:flex-start;color:var(--v-soft);font-size:1.02rem;line-height:1.5}
.vault li b{color:var(--v-ink);font-weight:600}
.vault li .lk{color:var(--v-acc);flex:none;margin-top:3px}
.vault .foot{margin-top:22px;padding-top:18px;border-top:1px solid var(--v-line);font-family:"IBM Plex Mono",monospace;font-size:.76rem;color:var(--v-soft)}

.benefits .grid{display:grid;grid-template-columns:1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
@media(min-width:640px){.benefits .grid{grid-template-columns:1fr 1fr 1fr}}
.b{background:var(--surface);padding:24px 20px;display:flex;flex-direction:column;gap:10px}
.b .ico{width:28px;height:28px;color:var(--accent)}
.b h3{font-size:1.2rem;margin:0}
.b p{color:var(--ink-soft);font-size:.97rem}
.platform{margin-top:14px;font-family:"IBM Plex Mono",monospace;font-size:.8rem;color:var(--ink-faint)}

.signup{background:var(--surface-2);border:1px solid var(--line);border-radius:20px;padding:30px 20px}
@media(min-width:560px){.signup{padding:34px 28px}}
.signup h2{font-size:clamp(1.5rem,4.5vw,2rem);margin:10px 0 8px}
.signup .sub{color:var(--ink-soft);margin-bottom:22px}
form{display:grid;gap:14px}
.row2{display:grid;gap:14px}
@media(min-width:560px){.row2{grid-template-columns:1fr 1fr}}
.field label{display:block;font-family:"IBM Plex Mono",monospace;font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-faint);margin-bottom:7px}
.field input,.field select{width:100%;font-family:inherit;font-size:1rem;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:12px 14px}
.field input:focus,.field select:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
.field input[aria-invalid="true"]{border-color:var(--err)}
.check{display:flex;align-items:flex-start;gap:10px;color:var(--ink-soft);font-size:.95rem}
.check input{width:18px;height:18px;margin-top:3px;accent-color:var(--accent);flex:none}
.check a{color:var(--accent)}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
form .btn-primary{margin-top:4px;padding:13px}
.err{color:var(--err);font-size:.92rem}
.microcopy{font-size:.82rem;color:var(--ink-faint)}
.thanks{display:none;padding:22px;border:1px dashed var(--accent);border-radius:12px;background:var(--surface)}
.thanks.show{display:block}
.thanks b{color:var(--accent)}

details{border-top:1px solid var(--line);padding:16px 0}
details:last-of-type{border-bottom:1px solid var(--line)}
summary{cursor:pointer;font-weight:600;font-size:1.05rem;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center}
summary::-webkit-details-marker{display:none}
summary .pm{color:var(--accent);font-family:"IBM Plex Mono",monospace;flex:none;transition:transform .2s ease}
details[open] summary .pm{transform:rotate(45deg)}
details p{color:var(--ink-soft);font-size:.97rem;margin-top:12px;max-width:62ch}

.privacy{padding-block:0 8px}
.privacy summary{font-size:.95rem;color:var(--ink-soft)}
.pn p{font-size:.9rem}
.pn b{color:var(--ink)}
.pn a{color:var(--accent)}

footer{border-top:1px solid var(--line);padding-block:30px 44px;color:var(--ink-faint)}
footer .brand{margin-bottom:10px;color:var(--ink)}
footer p{font-size:.9rem}
.fine{font-family:"IBM Plex Mono",monospace;font-size:.72rem;letter-spacing:.03em;margin-top:12px}

@media (prefers-reduced-motion: reduce){*{transition:none!important}html{scroll-behavior:auto}}