/* ============================================================
   SiloX — landing page stylesheet
   Dark-only. Obsidian canvas · brass hero · ember spark.
   Hand-authored, zero-build. Matches the SiloX app brand.
   ============================================================ */

/* ---- Fonts (self-hosted variable TTFs; server gzip handles transfer) ---- */
@font-face{
  font-family:"Archivo";
  src:url("../fonts/archivo.ttf") format("truetype");
  font-weight:100 900; font-stretch:62.5% 125%; font-display:swap;
}
@font-face{
  font-family:"Inter";
  src:url("../fonts/inter.ttf") format("truetype");
  font-weight:100 900; font-display:swap;
}
@font-face{
  font-family:"JetBrains Mono";
  src:url("../fonts/jetbrains-mono.ttf") format("truetype");
  font-weight:100 800; font-display:swap;
}

/* ---- Tokens ---- */
:root{
  --obsidian:#08080A; --surface-00:#0E0F12; --surface-01:#15171B;
  --surface-02:#1C1F24; --surface-03:#262A30; --hairline:#23262C;
  --bone:#F4F1E9; --ash-70:#B4AEA0; --ash-50:#7E7869; --ash-30:#534E45;
  --brass:#CBA35C; --brass-bright:#E0BE76; --brass-dim:#8C7240; --brass-wash:#1B160C; --on-brass:#0A0A0B;
  --ember:#FF5A23; --ember-bright:#FF7A4D; --on-ember:#0A0A0B; --ember-wash:#1F0E07;
  --ok:#5FB97E; --warn:#E0A33A; --danger:#E5484D; --info:#5AA6C9;
  --silo-vault:#CBA35C; --silo-dossier:#C2AC8E; --silo-oracle:#9E84C0; --silo-perimeter:#6FB59A; --silo-dispatch:#E0A33A;

  --display:"Archivo",system-ui,sans-serif;
  --sans:"Inter",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,monospace;

  --t-hero:clamp(2.75rem,7vw,6rem);
  --t-title:clamp(2rem,4.5vw,3.25rem);
  --t-h2:clamp(1.5rem,3vw,2.25rem);
  --t-lead:clamp(1.05rem,1.6vw,1.35rem);

  --maxw:1200px; --read:46rem;
  --pad-section:clamp(64px,10vw,150px);
  --radius-sm:10px; --radius-md:16px; --radius-lg:24px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---- Reset ---- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:clip}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  background:var(--obsidian); color:var(--bone);
  font-family:var(--sans); font-size:16px; line-height:1.6;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg,canvas{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
ul{list-style:none}
:focus-visible{outline:2px solid var(--brass);outline-offset:3px;border-radius:4px}

/* ---- Layout helpers ---- */
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(20px,5vw,40px)}
.section{padding-block:var(--pad-section);position:relative}
.eyebrow{font-family:var(--mono);font-size:.8rem;letter-spacing:.18em;text-transform:uppercase;color:var(--ash-50)}
.lead{font-size:var(--t-lead);color:var(--ash-70);max-width:var(--read)}
.mono{font-family:var(--mono)}
.brass{color:var(--brass)}
.center{text-align:center}
.grain::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.025;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/></filter><rect width='120' height='120' filter='url(%23n)'/></svg>");
  mix-blend-mode:overlay}

h1,h2,h3{font-family:var(--display);font-weight:800;line-height:1.04;letter-spacing:-.01em}
.h1{font-size:var(--t-hero);text-transform:uppercase;font-stretch:125%}
.h2{font-size:var(--t-title);text-transform:uppercase;font-stretch:125%}
.h3{font-size:var(--t-h2);font-weight:700;font-stretch:100%;letter-spacing:-.005em}

/* ---- Buttons ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  font-family:var(--sans);font-weight:600;font-size:.95rem;letter-spacing:.04em;text-transform:uppercase;
  padding:0 1.4rem;height:54px;border-radius:var(--radius-sm);transition:transform .15s var(--ease),box-shadow .25s var(--ease),background .2s}
.btn:active{transform:scale(.97)}
.btn-ember{background:var(--ember);color:var(--on-ember);box-shadow:0 0 0 rgba(255,90,35,0)}
.btn-ember:hover{background:var(--ember-bright);box-shadow:0 8px 30px rgba(255,90,35,.25)}
.btn-brass{background:var(--brass);color:var(--on-brass)}
.btn-brass:hover{background:var(--brass-bright)}
.btn-ghost{border:1px solid var(--ash-30);color:var(--bone)}
.btn-ghost:hover{border-color:var(--brass);color:var(--brass)}
.btn-sm{height:42px;font-size:.8rem;padding:0 1rem}
.btn-block{width:100%}
.link-brass{color:var(--brass);font-weight:600;border-bottom:1px solid transparent;transition:border-color .2s}
.link-brass:hover{border-color:var(--brass)}

/* ---- Nav ---- */
.progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--brass);z-index:60;transition:width .1s linear}
.nav{position:fixed;top:0;left:0;right:0;z-index:50;transition:background .3s,border-color .3s;border-bottom:1px solid transparent}
.nav.solid{background:rgba(14,15,18,.85);backdrop-filter:blur(12px);border-bottom-color:var(--brass-dim)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brandmark{display:flex;align-items:center;gap:.55rem;font-family:var(--display);font-weight:800;font-stretch:125%;letter-spacing:.05em;color:var(--brass);font-size:1.05rem}
.brandmark img{width:26px;height:26px}
.nav-links{display:none;gap:2rem}
.nav-links a{font-size:.9rem;color:var(--ash-70);transition:color .2s}
.nav-links a:hover{color:var(--bone)}
@media(min-width:900px){.nav-links{display:flex}}

/* ---- Hero ---- */
.hero{min-height:100svh;display:flex;align-items:center;position:relative;overflow:hidden;
  background:radial-gradient(120% 90% at 80% 10%,rgba(203,163,92,.07),transparent 55%),var(--obsidian)}
.hero-grid{display:grid;grid-template-columns:1fr;gap:clamp(32px,6vw,64px);align-items:center;padding-top:96px;padding-bottom:64px}
@media(min-width:1024px){.hero-grid{grid-template-columns:1.05fr .95fr}}
.hero h1{margin:1.2rem 0 1.4rem}
.hero h1 .l2{color:var(--brass);display:block}
.hero .word{display:inline-block}
.hero-sub{margin-bottom:2rem}
.scarcity{display:inline-flex;flex-wrap:wrap;align-items:center;gap:.4rem;margin-top:1.4rem;font-family:var(--mono);font-size:.78rem;color:var(--ash-50);
  border:1px solid var(--hairline);border-radius:14px;padding:.5rem .85rem;background:var(--surface-00);max-width:100%}
.scarcity b{color:var(--brass);font-weight:600}
.microtrust{margin-top:1rem;font-family:var(--mono);font-size:.72rem;color:var(--ash-50);letter-spacing:.02em}
.scrollcue{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);font-family:var(--mono);font-size:.65rem;letter-spacing:.25em;color:var(--ash-30);display:flex;flex-direction:column;align-items:center;gap:.4rem}
.scrollcue span{width:1px;height:28px;background:linear-gradient(var(--brass),transparent);animation:cue 2s var(--ease) infinite}
@keyframes cue{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}50.1%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ---- Inline form (hero + final) ---- */
.capture{display:flex;gap:.6rem;flex-wrap:wrap;max-width:520px}
.capture .field{flex:1;min-width:220px}
.input{width:100%;height:54px;background:var(--surface-02);border:1px solid var(--hairline);border-radius:var(--radius-sm);
  color:var(--bone);font-family:var(--sans);font-size:1rem;padding:0 1rem;transition:border-color .2s}
.input::placeholder{color:var(--ash-50)}
.input:focus{outline:none;border-color:var(--brass)}
.input.err{border-color:var(--danger)}
.field-msg{font-family:var(--mono);font-size:.72rem;color:var(--danger);margin-top:.4rem;min-height:1rem}

/* ---- Device frame + app mock ---- */
.device{justify-self:center;width:min(300px,80vw);aspect-ratio:9/19.5;background:#000;border-radius:36px;
  border:2px solid #1d1f24;box-shadow:0 30px 80px rgba(0,0,0,.6),inset 0 0 0 6px #0a0b0d;padding:10px;position:relative}
.device::before{content:"";position:absolute;top:14px;left:50%;transform:translateX(-50%);width:44px;height:5px;border-radius:3px;background:#2a2d33}
.screen{width:100%;height:100%;border-radius:28px;overflow:hidden;background:var(--obsidian);position:relative;display:flex;flex-direction:column}
.mock-hd{padding:18px 14px 10px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--hairline)}
.mock-hd .t{font-family:var(--display);font-stretch:125%;font-weight:800;color:var(--brass);font-size:.8rem;letter-spacing:.08em}
.mock-body{padding:12px;display:flex;flex-direction:column;gap:8px;overflow:hidden}
.mock-card{background:var(--surface-01);border:1px solid var(--hairline);border-radius:12px;padding:10px}
.mock-card .lbl{font-family:var(--mono);font-size:.5rem;letter-spacing:.15em;color:var(--ash-50);text-transform:uppercase}
.mock-card .big{font-family:var(--display);font-stretch:125%;font-weight:800;color:var(--bone);font-size:1.1rem;margin-top:4px}
.mock-row{display:flex;align-items:center;gap:8px;background:var(--surface-01);border:1px solid var(--hairline);border-radius:10px;padding:8px}
.mock-row .stripe{width:3px;height:26px;border-radius:2px}
.mock-row .tx{flex:1}
.mock-row .tx b{font-size:.62rem;color:var(--bone);display:block;font-weight:600}
.mock-row .tx span{font-size:.5rem;color:var(--ash-50);font-family:var(--mono)}
.mock-nav{margin-top:auto;display:flex;border-top:1px solid var(--brass-dim);background:var(--surface-00)}
.mock-nav div{flex:1;text-align:center;padding:8px 0;font-family:var(--mono);font-size:.45rem;letter-spacing:.1em;color:var(--ash-50);text-transform:uppercase}
.mock-nav div.on{color:var(--brass)}

/* ---- Hero instrument (replaces the device mock) ---- */
.hero-stage{justify-self:center;position:relative;width:min(480px,92vw);aspect-ratio:1/1}
.hero-canvas{width:100%;height:100%;display:block}
.hero-stage-cap{position:absolute;left:50%;bottom:1%;transform:translateX(-50%);white-space:nowrap;font-family:var(--mono);font-size:.6rem;letter-spacing:.2em;color:var(--ash-50)}
@media(max-width:480px){.hero-stage-cap{font-size:.5rem;letter-spacing:.14em}}

/* ---- Trust bar ---- */
.trustbar{border-block:1px solid var(--hairline);background:var(--surface-00)}
.trust-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--hairline)}
@media(min-width:768px){.trust-grid{grid-template-columns:repeat(4,1fr)}}
.trust-cell{background:var(--surface-00);padding:1.6rem 1.2rem;text-align:center}
.trust-cell .ic{color:var(--brass);margin-bottom:.6rem;display:flex;justify-content:center}
.trust-cell b{display:block;font-size:.95rem;font-weight:600}
.trust-cell span{font-family:var(--mono);font-size:.7rem;color:var(--ash-50)}

/* ---- Generic section header ---- */
.sec-head{max-width:var(--read);margin-bottom:clamp(40px,6vw,72px)}
.sec-head.center{margin-inline:auto}
.sec-head h2{margin:.8rem 0 1rem}

/* ---- Problem ---- */
.stakes-grid{display:grid;grid-template-columns:1fr;gap:clamp(28px,5vw,56px);align-items:center}
@media(min-width:860px){.stakes-grid{grid-template-columns:1.08fr .92fr}}
.stakes p{font-size:clamp(1.1rem,2vw,1.5rem);color:var(--ash-70);max-width:38rem;margin-bottom:.8rem;line-height:1.45}
.stakes .punch{color:var(--brass);font-family:var(--mono);font-size:1rem;margin-top:1.5rem}
.stakes-art{position:relative;width:100%;aspect-ratio:4/3;background:linear-gradient(160deg,var(--surface-01),var(--surface-00));border:1px solid var(--hairline);border-radius:var(--radius-lg);overflow:hidden}
.stakes-canvas{width:100%;height:100%;display:block}

/* ---- Silos ---- */
.silo{display:grid;grid-template-columns:1fr;gap:clamp(28px,5vw,64px);align-items:center;padding-block:clamp(40px,7vw,90px);border-top:1px solid var(--hairline)}
@media(min-width:860px){.silo{grid-template-columns:1fr 1fr}.silo.flip .silo-art{order:-1}}
.silo-glyph{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;border:1px solid var(--hairline);background:var(--surface-01);margin-bottom:1rem}
.silo h3{font-family:var(--display);font-stretch:125%;text-transform:uppercase;letter-spacing:.02em;font-size:clamp(1.6rem,3.4vw,2.4rem)}
.silo .promise{color:var(--brass);font-style:italic;margin:.5rem 0 1.2rem;font-size:1.05rem}
.silo ul li{display:flex;gap:.6rem;align-items:flex-start;color:var(--ash-70);margin-bottom:.7rem;font-size:1rem}
.silo ul li::before{content:"›";color:var(--brass);font-family:var(--mono);font-weight:700}
.silo-art{background:linear-gradient(160deg,var(--surface-01),var(--surface-00));border:1px solid var(--hairline);border-radius:var(--radius-lg);aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative}
.silo .more{margin-top:1.4rem;display:inline-block}

/* ---- Security model ---- */
.steps{display:grid;grid-template-columns:1fr;gap:1px;background:var(--hairline);border:1px solid var(--hairline);border-radius:var(--radius-md);overflow:hidden}
@media(min-width:860px){.steps{grid-template-columns:repeat(3,1fr)}}
.step{background:var(--surface-01);padding:1.8rem}
.step .n{font-family:var(--mono);color:var(--brass);font-size:.8rem;letter-spacing:.15em}
.step h4{font-family:var(--sans);font-weight:600;font-size:1.15rem;margin:.7rem 0 .5rem}
.step p{color:var(--ash-70);font-size:.95rem}
.kill{margin-top:2rem;background:var(--brass-wash);border:1px solid var(--brass-dim);border-radius:var(--radius-md);padding:1.4rem 1.6rem}
.kill b{color:var(--brass)}
.kill p{color:var(--bone);font-size:1.05rem}

/* ---- Comparison ---- */
.cmp{width:100%;border-collapse:collapse;font-size:.92rem}
.cmp-scroll{overflow-x:auto;border:1px solid var(--hairline);border-radius:var(--radius-md)}
.cmp th,.cmp td{padding:1rem 1.1rem;text-align:left;border-bottom:1px solid var(--hairline);white-space:nowrap}
.cmp thead th{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ash-50);background:var(--surface-00)}
.cmp thead th.us{color:var(--brass)}
.cmp td:first-child{color:var(--ash-70)}
.cmp .y{color:var(--ok);font-weight:700}
.cmp .n{color:var(--ash-30)}
.cmp .p{color:var(--warn)}
.cmp tbody tr:last-child td{border-bottom:none}
.cmp .col-us{background:rgba(203,163,92,.05)}

/* ---- Quote / proof ---- */
.quote{max-width:48rem;margin-inline:auto;text-align:center}
.quote blockquote{font-family:var(--display);font-weight:700;font-size:clamp(1.4rem,3vw,2.1rem);line-height:1.25;color:var(--bone)}
.quote blockquote::before{content:"\201C";color:var(--brass);font-size:1.2em;line-height:0}
.quote cite{display:block;margin-top:1.4rem;font-family:var(--mono);font-size:.8rem;color:var(--ash-50);font-style:normal;letter-spacing:.1em}
.proof-list{display:grid;grid-template-columns:1fr;gap:1px;background:var(--hairline);border:1px solid var(--hairline);border-radius:var(--radius-md);overflow:hidden;margin-top:3rem}
@media(min-width:680px){.proof-list{grid-template-columns:repeat(3,1fr)}}
.proof-list div{background:var(--surface-01);padding:1.3rem;text-align:center}
.proof-list b{display:block;color:var(--brass);font-family:var(--mono);font-size:1rem}
.proof-list span{font-size:.85rem;color:var(--ash-70)}

/* ---- Conversion block ---- */
.convert{background:var(--surface-01);border:1px solid var(--brass-dim);border-radius:var(--radius-lg);padding:clamp(28px,5vw,56px);max-width:760px;margin-inline:auto;text-align:center;position:relative;overflow:hidden}
.convert::before{content:"";position:absolute;inset:0;background:radial-gradient(80% 60% at 50% 0,rgba(203,163,92,.08),transparent);pointer-events:none}
.convert h2{margin-bottom:.8rem}
.convert .lead{margin-inline:auto;margin-bottom:2rem}
.form-full{display:flex;flex-direction:column;gap:1rem;text-align:left;position:relative;z-index:1}
.form-row{display:flex;gap:.6rem;flex-wrap:wrap}
.form-row .field{flex:1;min-width:200px}
.extra{display:grid;grid-template-columns:1fr;gap:1rem;max-height:0;overflow:hidden;opacity:0;transition:max-height .5s var(--ease),opacity .4s,margin .4s;margin:0}
.extra.open{max-height:600px;opacity:1;margin-top:.2rem}
@media(min-width:620px){.extra{grid-template-columns:1fr 1fr}}
.select{width:100%;height:54px;background:var(--surface-02);border:1px solid var(--hairline);border-radius:var(--radius-sm);color:var(--bone);font-family:var(--sans);font-size:1rem;padding:0 1rem;appearance:none;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%237E7869' stroke-width='2'><path d='M2 4l4 4 4-4'/></svg>");background-repeat:no-repeat;background-position:right 1rem center}
.select:focus{outline:none;border-color:var(--brass)}
.lbl-field{font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ash-50);display:block;margin-bottom:.4rem}
.consent{display:flex;gap:.6rem;align-items:flex-start;font-size:.82rem;color:var(--ash-70);text-align:left}
.consent input{margin-top:.2rem;accent-color:var(--brass);width:18px;height:18px;flex:none}
.reassure{font-family:var(--mono);font-size:.68rem;color:var(--ash-50);margin-top:.4rem}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.form-status{font-family:var(--mono);font-size:.8rem;min-height:1.2rem}
.form-status.error{color:var(--danger)}

/* success card */
.success{text-align:center;padding:1rem 0}
.success .tick{width:56px;height:56px;border-radius:50%;background:var(--ok);color:var(--obsidian);display:flex;align-items:center;justify-content:center;margin:0 auto 1rem;font-size:1.6rem}
.success h3{margin-bottom:.6rem}
.success .pos{font-family:var(--mono);color:var(--brass);font-size:1.4rem;margin:.4rem 0 1.2rem}
.refbox{display:flex;gap:.5rem;max-width:360px;margin:1rem auto 0}
.refbox input{flex:1;text-align:center;font-family:var(--mono);letter-spacing:.1em}

/* ---- FAQ ---- */
.faq{max-width:var(--read);margin-inline:auto}
.faq details{border-bottom:1px solid var(--hairline)}
.faq summary{list-style:none;cursor:pointer;padding:1.3rem 0;display:flex;justify-content:space-between;align-items:center;gap:1rem;font-weight:600;font-size:1.05rem;color:var(--bone)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--mono);color:var(--brass);font-size:1.4rem;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 0 1.3rem;color:var(--ash-70);max-width:42rem}

/* ---- Final CTA ---- */
.final{text-align:center;background:radial-gradient(100% 80% at 50% 100%,rgba(255,90,35,.06),transparent),var(--surface-00);border-top:1px solid var(--hairline)}
.final h2{margin-bottom:1.6rem}
.final .capture{margin-inline:auto;justify-content:center}

/* ---- Footer ---- */
.footer{background:var(--surface-00);border-top:1px solid var(--hairline);padding-block:clamp(48px,7vw,80px)}
.footer-grid{display:grid;grid-template-columns:1fr;gap:2.5rem}
@media(min-width:760px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1fr}}
.footer .brandmark{margin-bottom:1rem}
.footer-tag{color:var(--ash-50);font-family:var(--mono);font-size:.8rem;max-width:22rem}
.footer h5{font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ash-50);margin-bottom:1rem}
.footer a{display:block;color:var(--ash-70);padding:.3rem 0;font-size:.92rem;transition:color .2s}
.footer a:hover{color:var(--brass)}
.footer-fine{margin-top:3rem;padding-top:1.5rem;border-top:1px solid var(--hairline);font-family:var(--mono);font-size:.72rem;color:var(--ash-30)}

/* ---- Reveal animation ---- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.visible{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}.reveal.d4{transition-delay:.32s}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .scrollcue span{animation:none}
}

/* mobile sticky CTA */
.sticky-cta{position:fixed;left:0;right:0;bottom:0;z-index:45;padding:.7rem 1rem;background:rgba(14,15,18,.92);backdrop-filter:blur(10px);border-top:1px solid var(--brass-dim);transform:translateY(120%);transition:transform .35s var(--ease)}
.sticky-cta.show{transform:none}
@media(min-width:760px){.sticky-cta{display:none}}