/* ==========================================================================
   BITCOINkeystick — bitcoinkeystick.com
   Built to BTCkeystick Brand Guidelines v1.0, August 2026.
   Where a rule is stated as a number in the guidelines, the number is used.
   One ink. No gradients. Ever.
   ========================================================================== */

:root{
  /* 05 Colour — the eight tokens, no others exist */
  --orange:      #F7931A;   /* mark, divider, badge dot, links */
  --orange-press:#D97C0B;   /* interactive states only, never inside the mark */
  --ink:         #14161B;   /* headings, mono mark, sticker */
  --stock:       #FAF8F4;   /* primary light ground */
  --ground:      #0D0D12;   /* dark surfaces, family ground */
  --body:        #4A4A55;   /* body copy on light */
  --meta:        #86868F;   /* captions, labels, badge */
  --tagline:     #7E7E8F;   /* tagline only */

  --rule:        rgba(20,22,27,.10);
  --rule-dark:   rgba(255,255,255,.09);
  --card:        #FFFFFF;

  /* 06 Type scale */
  --t-display:  34px;
  --t-statement:26px;
  --t-section:  19px;
  --t-body:     14px;
  --t-caption:  12px;
  --t-badge:    10px;

  --maxw: 1080px;
  --gut:  clamp(20px, 5vw, 40px);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--stock);
  color:var(--body);
  font-family:"Nunito Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  font-weight:300;                 /* Body — Light 300 */
  font-size:var(--t-body);
  line-height:1.65;                /* 06 Typography */
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

/* ---- Type ---------------------------------------------------------------- */
h1,h2,h3,h4{
  font-weight:600;                 /* Headings — SemiBold 600 */
  letter-spacing:-0.01em;
  color:var(--ink);
  margin:0 0 .5em;
  line-height:1.18;
}
h1{font-size:var(--t-display)}
h2{font-size:var(--t-statement)}
h3{font-size:var(--t-section)}
h4{font-size:var(--t-body)}
p{margin:0 0 1.1em}
a{color:var(--orange);text-decoration:none}
a:hover{color:var(--orange-press);text-decoration:underline;text-underline-offset:3px}
strong{font-weight:600;color:var(--ink)}
small{font-size:var(--t-caption)}
hr{border:0;border-top:1px solid var(--rule);margin:0}

.label{
  font-size:var(--t-badge);
  font-weight:600;
  letter-spacing:.16em;            /* Labels — SemiBold 600, .16em, uppercase */
  text-transform:uppercase;
  color:var(--meta);
}
.section-num{
  font-size:var(--t-badge);
  font-weight:600;
  letter-spacing:.16em;
  color:var(--orange);
}
.caption{font-size:var(--t-caption);color:var(--meta)}
.lede{font-size:16px;color:var(--body);max-width:62ch}

/* Technical type — IBM Plex Mono. Reserved for checksums, seed words,
   derivation paths and addresses. Never used for marketing copy. */
.mono,code,kbd{
  font-family:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:.92em;
  font-weight:400;
}
.hash{
  font-family:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:13px;
  line-height:2;
  color:var(--ink);
  word-break:break-all;
  background:rgba(20,22,27,.035);
  border:1px solid var(--rule);
  border-radius:6px;
  padding:14px 16px;
  display:block;
}

/* ---- Layout -------------------------------------------------------------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gut)}
section{padding:64px 0;border-bottom:1px solid var(--rule)}
section:last-of-type{border-bottom:0}
.sec-head{display:flex;align-items:baseline;gap:13px;margin-bottom:6px}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:860px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.g2,.g3,.g4{grid-template-columns:1fr}}

.card{
  background:var(--card);
  border:1px solid var(--rule);
  border-radius:12px;
  padding:24px;
}
.card h4{margin-bottom:.45em}
.card p:last-child{margin-bottom:0}
.card.dark{background:var(--ground);border-color:var(--rule-dark);color:#A9A9B4}
.card.dark h3,.card.dark h4{color:#fff}

/* ---- Mark & lockups ------------------------------------------------------
   03 The mark — the Bitcoin community B, public domain, deliberately not
   redrawn. Upright, never tilted. Four variants, no fifth.
   Never rasterised: every instance on this site is inline SVG.
   -------------------------------------------------------------------------- */
.mark{display:block;flex:none}
.mark--nav{width:30px;height:30px}      /* above the 16px disc minimum */
.mark--hero{width:64px;height:64px}
.mark--foot{width:22px;height:22px}

/* 07 Lockups — divider 2px wide, 2px radius, 0.9 x mark height,
   26px gap either side at hero size. Never dropped, never crowded. */
.lockup{display:flex;align-items:center;gap:26px}
.lockup--nav{gap:13px}
.divider{
  width:2px;border-radius:2px;background:var(--orange);flex:none;
}
.lockup--nav .divider{height:27px}       /* 0.9 x 30 */
.lockup--hero .divider{height:58px}      /* 0.9 x 64 */
.lockup--foot .divider{height:20px}
.wordmark{
  font-weight:600;                       /* Wordmark — SemiBold 600, -0.02em */
  letter-spacing:-0.02em;
  color:var(--ink);
  line-height:1;
  white-space:nowrap;
}
.lockup--nav .wordmark{font-size:21px}
.lockup--hero .wordmark{font-size:46px}
.lockup--foot .wordmark{font-size:16px}
.on-ground .wordmark{color:#FFFFFF}      /* family ground: wordmark switches to pure white */

.tagline{
  font-size:var(--t-caption);
  font-weight:300;
  letter-spacing:.34em;
  text-transform:uppercase;
  color:var(--tagline);
}

/* Full-name wordmark — BITCOIN Light 300 at .1em tracking reads as a prefix,
   keystick SemiBold 600 carries the weight. Both at one optical size. */
.fullname{line-height:1;white-space:nowrap;color:var(--ink)}
.fullname .b{font-weight:300;letter-spacing:.1em;color:var(--orange)}
.fullname .k{font-weight:600;letter-spacing:-0.02em}
.on-ground .fullname .k{color:#fff}

/* Attribution badge. The parent wordmark is supplied artwork and is never set
   as live type — see .koini-art. Minimum 18px on screen; below that the whole
   attribution is dropped rather than the wordmark shrunk. */
.attrib{
  display:inline-flex;align-items:center;gap:8px;
  font-size:var(--t-badge);font-weight:600;letter-spacing:.16em;
  text-transform:uppercase;color:var(--meta);
}
.attrib .dot{width:4px;height:4px;border-radius:50%;background:var(--orange);flex:none}
.koini-art{height:18px;width:auto;display:block}

/* ---- Nav ----------------------------------------------------------------- */
.banner{
  background:var(--ink);color:#EDEDF2;
  font-size:var(--t-badge);font-weight:600;letter-spacing:.16em;
  text-transform:uppercase;text-align:center;padding:9px 16px;
}
.banner b{color:var(--orange);font-weight:600}
header.site{
  position:sticky;top:0;z-index:50;
  background:rgba(250,248,244,.94);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--rule);
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 0}
.nav-links{display:flex;flex-wrap:wrap;gap:18px;align-items:center}
.nav-links a{
  font-size:var(--t-caption);font-weight:600;color:var(--body);
  letter-spacing:.01em;text-decoration:none;
}
.nav-links a:hover{color:var(--ink)}
.nav-links a.active{color:var(--ink)}
.nav-links a.cta{color:var(--orange)}
@media(max-width:900px){
  .nav{flex-direction:column;align-items:flex-start;gap:12px}
  .nav-links{gap:14px}
}

/* ---- Buttons ------------------------------------------------------------- */
.btn{
  display:inline-block;font-weight:600;font-size:var(--t-body);
  padding:12px 22px;border-radius:8px;border:1px solid transparent;
  text-decoration:none;cursor:pointer;transition:background .12s,border-color .12s;
}
.btn--primary{background:var(--orange);color:#fff}
.btn--primary:hover{background:var(--orange-press);color:#fff;text-decoration:none}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--rule)}
.btn--ghost:hover{border-color:var(--ink);color:var(--ink);text-decoration:none}
.btn[aria-disabled="true"]{
  background:transparent;color:var(--meta);border-color:var(--rule);
  pointer-events:none;
}

/* ---- Hero ---------------------------------------------------------------- */
.hero{background:var(--ground);color:#A9A9B4;padding:78px 0 70px}
.hero h1{color:#fff;font-size:clamp(28px,5vw,44px);max-width:18ch}
.hero .lede{color:#A9A9B4;font-size:16px;max-width:56ch}
.hero .actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero .btn--ghost{color:#fff;border-color:var(--rule-dark)}
.hero .btn--ghost:hover{border-color:#fff}

/* ---- Statement ----------------------------------------------------------- */
.statement{
  font-size:var(--t-statement);font-weight:600;color:var(--ink);
  letter-spacing:-0.01em;line-height:1.3;max-width:24ch;
}

/* ---- Product cards ------------------------------------------------------- */
.prod{display:flex;flex-direction:column;gap:14px}
.prod img{width:100%;height:auto;border-radius:8px;background:#F2F0EC;display:block}
.shot-pending{
  aspect-ratio:4/3;border-radius:8px;background:#F2F0EC;
  border:1px dashed rgba(20,22,27,.14);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;
}
.shot-pending .mark{opacity:.28}
.prod .price{font-size:var(--t-statement);font-weight:600;color:var(--ink);letter-spacing:-0.01em}
.prod .spec{font-size:var(--t-caption);color:var(--meta)}
.prod .soldout{color:var(--meta)}

/* ---- Steps / numbered ---------------------------------------------------- */
.step{display:flex;gap:16px;align-items:flex-start}
.step .n{
  flex:none;width:26px;height:26px;border-radius:50%;
  border:1.5px solid var(--orange);color:var(--orange);
  font-size:var(--t-caption);font-weight:600;
  display:flex;align-items:center;justify-content:center;
}

/* ---- Callouts ------------------------------------------------------------ */
.note{
  border-left:2px solid var(--orange);
  padding:2px 0 2px 18px;margin:0 0 1.1em;
}
.warn{
  border:1px solid rgba(247,147,26,.4);
  background:rgba(247,147,26,.06);
  border-radius:10px;padding:20px 22px;
}
.warn h4{color:var(--ink)}
.warn p:last-child{margin-bottom:0}

/* ---- FAQ ----------------------------------------------------------------- */
details{border-bottom:1px solid var(--rule);padding:16px 0}
details summary{
  cursor:pointer;font-weight:600;color:var(--ink);font-size:15px;
  list-style:none;display:flex;justify-content:space-between;gap:16px;
}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"+";color:var(--orange);font-weight:600;flex:none}
details[open] summary::after{content:"–"}
details .body{padding-top:12px}
details .body p:last-child{margin-bottom:0}

/* ---- Table --------------------------------------------------------------- */
table{width:100%;border-collapse:collapse;font-size:var(--t-body)}
th,td{text-align:left;padding:11px 12px;border-bottom:1px solid var(--rule);vertical-align:top}
th{font-size:var(--t-badge);font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--meta)}
td.mono{font-size:12.5px}

/* ---- Footer -------------------------------------------------------------- */
footer.site{background:var(--ground);color:#8A8A99;padding:52px 0 40px}
footer.site h4{color:#fff;font-size:var(--t-badge);font-weight:600;letter-spacing:.16em;text-transform:uppercase;margin-bottom:14px}
footer.site a{color:#B9B9C4;font-size:var(--t-caption);text-decoration:none;display:block;margin-bottom:8px}
footer.site a:hover{color:#fff;text-decoration:none}
.foot-bottom{
  margin-top:38px;padding-top:24px;border-top:1px solid var(--rule-dark);
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center;
}
.foot-bottom p{font-size:var(--t-caption);color:#6E6E7A;margin:0;max-width:70ch}
.foot-std{
  font-family:"IBM Plex Mono",ui-monospace,monospace;
  font-size:11px;letter-spacing:.08em;color:#6E6E7A;
}

/* ---- Utility ------------------------------------------------------------- */
.mt0{margin-top:0}.mb0{margin-bottom:0}
.mt24{margin-top:24px}.mt32{margin-top:32px}.mt40{margin-top:40px}
.center{text-align:center}
.stack{display:flex;flex-direction:column;gap:10px}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.skip{position:absolute;left:-9999px}
.skip:focus{left:8px;top:8px;background:#fff;padding:8px 14px;border-radius:6px;z-index:99}