/* Cybran Protocol — site styles
   Palette: obsidian ink, frost paper, one blue accent. Geometry is octagonal
   and 45°, matching the mark. */

:root{
  --ink:#0A0B0D;
  --ink-2:#1B1F26;
  --body:#454B55;
  --muted:#6B7280;
  --paper:#FFFFFF;
  --frost:#E8ECF2;
  --frost-2:#F3F5F9;
  --line:rgba(10,11,13,.10);
  --line-soft:rgba(10,11,13,.06);
  --blue:#3F5FD8;
  --blue-ink:#2F49AC;
  --ice:#849FFF;
  --ok:#1B8A5A;
  --warn:#B4741A;
  --err:#C0392B;

  --sans:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,'SFMono-Regular',Menlo,monospace;

  --wrap:1160px;
  --r:14px;
  --grid:rgba(10,11,13,.05);
}

*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--body);
  font-family:var(--sans);font-size:17px;line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{color:var(--blue-ink)}
h1,h2,h3,h4{color:var(--ink);margin:0;text-wrap:balance;letter-spacing:-.02em;line-height:1.1}
h1{font-size:clamp(38px,5.2vw,62px);font-weight:700}
h2{font-size:clamp(28px,3.4vw,40px);font-weight:700}
h3{font-size:20px;font-weight:600;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:6px}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.eyebrow{
  font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.22em;
  text-transform:uppercase;color:var(--muted);
}
.lede{font-size:19px;max-width:58ch}
.muted{color:var(--muted)}
.mono{font-family:var(--mono)}

/* ------------------------------------------------------------------ header */
.site-head{
  position:sticky;top:0;z-index:40;background:rgba(255,255,255,.86);
  backdrop-filter:saturate(160%) blur(12px);border-bottom:1px solid var(--line-soft);
}
.site-head .row{display:flex;align-items:center;gap:28px;height:72px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{width:30px;height:30px}
.brand b{
  font-weight:700;font-size:19px;letter-spacing:.16em;color:var(--ink);
}
.site-nav{display:flex;gap:26px;margin-left:auto}
.site-nav a{color:var(--body);font-size:15px;font-weight:500}
.site-nav a:hover{color:var(--ink)}
@media (max-width:860px){.site-nav{display:none}}

/* ------------------------------------------------------------------ buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:12px 22px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:.16s ease;
  font-family:inherit;line-height:1.2;white-space:nowrap;
}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-ink);color:#fff}
.btn-dark{background:var(--ink);color:var(--frost)}
.btn-dark:hover{background:var(--ink-2);color:#fff}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink);color:var(--ink)}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-block{width:100%}

/* -------------------------------------------------------------------- hero */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line-soft)}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(to right,var(--grid) 1px,transparent 1px),
                   linear-gradient(to bottom,var(--grid) 1px,transparent 1px);
  background-size:64px 64px;background-position:center;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(58% 62% at 30% 42%,#fff 40%,rgba(255,255,255,0) 100%);
}
.hero .wrap{position:relative;z-index:1;padding-top:86px;padding-bottom:86px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
@media (max-width:940px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero .wrap{padding-top:56px;padding-bottom:56px}
}
.hero h1{margin:16px 0 18px}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.hero-art{width:100%;max-width:520px;margin-inline:auto}

/* ------------------------------------------------------------------ strip */
.strip{border-bottom:1px solid var(--line-soft);background:var(--frost-2)}
.strip ul{
  display:flex;flex-wrap:wrap;gap:10px 34px;padding:16px 0;
  font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);
}
.strip li{display:flex;align-items:center;gap:9px}
.strip li::before{content:"";width:7px;height:7px;background:var(--blue);
  transform:rotate(45deg);flex:none}

/* --------------------------------------------------------------- sections */
section{padding:88px 0}
@media (max-width:760px){section{padding:60px 0}}
.section-head{max-width:62ch;margin-bottom:44px;display:grid;gap:14px}
.alt{background:var(--frost-2);border-block:1px solid var(--line-soft)}

.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
@media (max-width:860px){.split{grid-template-columns:1fr;gap:34px}}

/* ----------------------------------------------------------------- cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px}
.card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r);
  padding:26px 24px;display:grid;gap:10px;align-content:start;transition:.16s ease;
}
.card:hover{border-color:rgba(63,95,216,.45)}
.card .ico{width:34px;height:34px;margin-bottom:6px}
.card p{font-size:15.5px;line-height:1.6}
.card .tag{
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--blue);
}
.card.soon .tag{color:var(--muted)}

/* ----------------------------------------------------------------- steps */
.steps{counter-reset:s;display:grid;gap:2px}
.step{
  display:grid;grid-template-columns:auto 1fr;gap:22px;padding:24px 0;
  border-top:1px solid var(--line);
}
.step:last-child{border-bottom:1px solid var(--line)}
.step .n{
  font-family:var(--mono);font-size:13px;color:var(--blue);padding-top:4px;
  letter-spacing:.1em;
}
.step h3{margin-bottom:6px}
.step p{font-size:15.5px;max-width:56ch}

/* ------------------------------------------------------------ dark block */
.dark{background:var(--ink);color:#B9C0CC;border-block:1px solid #000}
.dark h2,.dark h3{color:var(--frost)}
.dark .eyebrow{color:#7C8494}
.dark a{color:var(--ice)}
.dark .card{background:#12151A;border-color:rgba(232,236,242,.10)}
.dark .card:hover{border-color:rgba(132,159,255,.45)}
.dark .card .tag{color:var(--ice)}

/* ------------------------------------------------------------- flow chain */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:34px}
@media (max-width:760px){.flow{grid-template-columns:1fr 1fr}}
.flow div{
  border:1px solid rgba(232,236,242,.14);border-radius:var(--r);padding:20px 18px;
  display:grid;gap:6px;position:relative;
}
.flow b{color:var(--frost);font-size:16px;font-weight:600}
.flow span{font-family:var(--mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--ice)}

/* -------------------------------------------------------------- key stats */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:8px}
@media (max-width:760px){.stats{grid-template-columns:1fr}}
.stat{border:1px solid rgba(232,236,242,.14);border-radius:var(--r);padding:24px}
.stat b{display:block;color:var(--frost);font-size:34px;font-weight:700;letter-spacing:-.02em}
.stat span{font-family:var(--mono);font-size:11.5px;letter-spacing:.16em;
  text-transform:uppercase;color:#7C8494}

/* --------------------------------------------------------------- faq */
.faq{display:grid;gap:0;max-width:820px}
.faq details{border-top:1px solid var(--line);padding:20px 0}
.faq details:last-of-type{border-bottom:1px solid var(--line)}
.faq summary{
  cursor:pointer;font-weight:600;color:var(--ink);font-size:17px;list-style:none;
  display:flex;justify-content:space-between;gap:20px;align-items:center;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--mono);color:var(--blue);font-size:20px}
.faq details[open] summary::after{content:"–"}
.faq p{margin-top:12px;font-size:15.5px;max-width:64ch}

/* ------------------------------------------------------------------ note */
.note{
  border:1px solid var(--line);border-left:3px solid var(--blue);border-radius:10px;
  padding:16px 18px;font-size:14.5px;background:var(--frost-2);
}
.dark .note{background:#12151A;border-color:rgba(232,236,242,.12);border-left-color:var(--ice)}

/* ---------------------------------------------------------------- footer */
.site-foot{background:var(--ink);color:#8A93A3;padding:56px 0 34px;font-size:14.5px}
.site-foot a{color:#C3CAD6}
.site-foot a:hover{color:#fff}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
@media (max-width:760px){.foot-grid{grid-template-columns:1fr;gap:26px}}
.foot-grid h4{color:var(--frost);font-size:13px;font-family:var(--mono);
  letter-spacing:.18em;text-transform:uppercase;font-weight:500;margin-bottom:12px}
.foot-grid li{margin-bottom:8px}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.foot-brand img{width:28px;height:28px}
.foot-brand b{color:var(--frost);letter-spacing:.16em;font-size:17px}
.foot-legal{
  border-top:1px solid rgba(232,236,242,.10);margin-top:34px;padding-top:20px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:#6B7382;font-family:var(--mono);letter-spacing:.04em;
}

/* =========================================================== app page === */
.app-shell{max-width:1060px;margin:0 auto;padding:40px 24px 80px}
.app-top{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:26px}
.chip{
  display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:999px;
  border:1px solid var(--line);font-family:var(--mono);font-size:12.5px;color:var(--body);
  background:var(--paper);
}
.chip .dot{width:8px;height:8px;border-radius:50%;background:var(--muted)}
.chip.on .dot{background:var(--ok)}
.chip.bad .dot{background:var(--err)}
.spacer{margin-left:auto}

.tabs{display:flex;gap:6px;border-bottom:1px solid var(--line);margin-bottom:26px;
  overflow-x:auto}
.tab{
  appearance:none;background:none;border:0;border-bottom:2px solid transparent;
  padding:12px 16px;font-family:inherit;font-size:15px;font-weight:600;color:var(--muted);
  cursor:pointer;white-space:nowrap;
}
.tab[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--blue)}

.panel{display:grid;gap:22px;padding:0}
.panel[hidden]{display:none}
.pane-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:start}
@media (max-width:860px){.pane-grid{grid-template-columns:1fr}}

.box{border:1px solid var(--line);border-radius:var(--r);padding:24px;background:var(--paper)}
.box h3{margin-bottom:6px}
.box .hint{font-size:14px;color:var(--muted);margin-bottom:18px}

label{display:block;font-family:var(--mono);font-size:11.5px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--muted);margin-bottom:7px}
input,textarea,select{
  width:100%;padding:13px 14px;border:1px solid var(--line);border-radius:10px;
  font-family:var(--mono);font-size:14.5px;color:var(--ink);background:var(--paper);
}
textarea{min-height:150px;line-height:1.6;resize:vertical}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--blue)}
.field{margin-bottom:16px}
.field-row{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:end}

.kv{display:grid;gap:10px;font-family:var(--mono);font-size:13.5px}
.kv div{display:flex;justify-content:space-between;gap:14px}
.kv dt,.kv .k{color:var(--muted)}
.kv .v{color:var(--ink);text-align:right;word-break:break-all}
.kv.left .v{text-align:left;margin-left:18px}

.log{display:grid;gap:8px;margin-top:16px}
.log-row{
  display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;
  border:1px solid var(--line);border-radius:10px;padding:11px 14px;
  font-family:var(--mono);font-size:13px;
}
.log-row .st{width:9px;height:9px;border-radius:50%;background:var(--muted)}
.log-row.pending .st{background:var(--warn)}
.log-row.done .st{background:var(--ok)}
.log-row.fail .st{background:var(--err)}
.log-row .addr{color:var(--ink);overflow:hidden;text-overflow:ellipsis}

.msg{border-radius:10px;padding:13px 16px;font-size:14.5px;display:none}
.msg.show{display:block}
.msg.ok{background:rgba(27,138,90,.08);color:#14664395;color:#146643;
  border:1px solid rgba(27,138,90,.3)}
.msg.err{background:rgba(192,57,43,.07);color:#9C2B20;border:1px solid rgba(192,57,43,.3)}
.msg.info{background:var(--frost-2);color:var(--body);border:1px solid var(--line)}

.locked{
  border:1px dashed var(--line);border-radius:var(--r);padding:34px 26px;text-align:center;
  display:grid;gap:12px;justify-items:center;background:var(--frost-2);
}
.locked svg{width:54px;height:54px;opacity:.55}
.qr{display:grid;justify-items:center;gap:14px;margin-top:18px}
.qr canvas,.qr img{border:1px solid var(--line);border-radius:10px;padding:10px;background:#fff}
.copyline{display:flex;gap:8px;align-items:center}
.copyline input{flex:1}