/* Kcoin design system — near-black base, gold accent, hairline geometry, tabular figures.
   Deliberately dependency-free and self-hosted: no web fonts, no CDN, nothing that phones home. */
:root{
  --bg:#06070a; --bg2:#0a0c11; --surface:#0f1219; --surface2:#151925; --raise:#1b2030;
  --line:rgba(255,255,255,.07); --line2:rgba(255,255,255,.13);
  --txt:#eef1f7; --muted:#8a93a6; --dim:#5c6478;
  --gold:#f0c453; --gold2:#d9a93a; --mint:#3ddc97; --red:#ff5f6d; --violet:#8b7cff; --cyan:#4cc9f0;
  --r:16px; --r-sm:11px; --r-lg:22px;
  --shadow:0 18px 50px -18px rgba(0,0,0,.85);
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,monospace;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
/* `hidden` must beat the display rules below — .gate/.app/.modal all set display, which would
   otherwise override the attribute and leave invisible full-screen overlays swallowing clicks. */
[hidden]{display:none!important}
body{
  background:var(--bg); color:var(--txt); min-height:100dvh;
  font:15px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
  font-variant-numeric:tabular-nums;
}
body::before{ /* ambient light so the black doesn't read as flat */
  content:""; position:fixed; inset:0; pointer-events:none; z-index:0;
  background:
    radial-gradient(900px 500px at 15% -10%, rgba(240,196,83,.09), transparent 60%),
    radial-gradient(700px 420px at 95% 0%, rgba(139,124,255,.07), transparent 60%),
    radial-gradient(600px 500px at 50% 110%, rgba(61,220,151,.05), transparent 60%);
}
.grain{position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.5;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='.035'/%3E%3C/svg%3E")}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid var(--gold);outline-offset:2px;border-radius:6px}
h1,h2,h3{margin:0;letter-spacing:-.02em}
a{color:var(--gold);text-decoration:none}
a:hover{text-decoration:underline}
b,strong{font-weight:650}
.mono{font-family:var(--mono);letter-spacing:-.01em}
.ic{width:20px;height:20px;fill:currentColor;flex:none}
svg.ic[stroke],.ic use{pointer-events:none}

/* ─────────── brand ─────────── */
.brand{display:flex;align-items:center;gap:13px}
.brand-mark{
  display:grid;place-items:center;width:44px;height:44px;border-radius:13px;flex:none;
  background:linear-gradient(150deg,var(--gold),var(--gold2));color:#1a1305;
  font-weight:800;font-size:22px;letter-spacing:-.03em;
  box-shadow:0 8px 24px -10px rgba(240,196,83,.7), inset 0 1px 0 rgba(255,255,255,.5);
}
.brand h1{font-size:26px;font-weight:750}
.brand-sub{margin:1px 0 0;color:var(--muted);font-size:12.5px;letter-spacing:.02em}
.brand.sm .brand-mark{width:32px;height:32px;border-radius:9px;font-size:16px}
.brand.sm b{font-size:16.5px;letter-spacing:-.01em}

/* ─────────── gate ─────────── */
.gate{position:relative;z-index:2;min-height:100dvh;display:grid;align-content:center;justify-items:center;
  padding:28px 18px calc(28px + env(safe-area-inset-bottom))}
.gate-card{
  width:100%;max-width:520px;background:linear-gradient(180deg,var(--surface),var(--bg2));
  border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;box-shadow:var(--shadow);
}
.gate-card h2.gate-h{font-size:19px;margin-bottom:6px}
.gate-card .brand{margin-bottom:22px}
.gate-sep{height:1px;background:var(--line);margin:20px 0}
.note{color:var(--muted);font-size:13px;margin:0 0 16px}
.footnote{color:var(--dim);font-size:11.5px;text-align:center;margin:20px 0 0;line-height:1.7}
.steps{display:flex;gap:6px;margin-bottom:14px}
.steps .dot{width:22px;height:3px;border-radius:2px;background:var(--line2)}
.steps .dot.on{background:var(--gold)}
.stat-row{display:flex;gap:10px;margin-top:16px}
.stat{flex:1;text-align:center;padding:12px 6px;border:1px solid var(--line);border-radius:var(--r-sm);background:rgba(255,255,255,.02)}
.stat b{display:block;font-size:15px;color:var(--gold)}
.stat span{font-size:10.5px;color:var(--dim);letter-spacing:.03em}

/* ─────────── controls ─────────── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 18px;border-radius:var(--r-sm);font-weight:620;font-size:14.5px;
  border:1px solid transparent;transition:transform .12s ease,filter .15s ease,background .15s ease}
.btn:active{transform:translateY(1px)}
.btn-primary{background:linear-gradient(160deg,var(--gold),var(--gold2));color:#191203;
  box-shadow:0 10px 26px -12px rgba(240,196,83,.75)}
.btn-primary:hover{filter:brightness(1.06)}
.btn-ghost{background:rgba(255,255,255,.03);border-color:var(--line2);color:var(--txt)}
.btn-ghost:hover{background:rgba(255,255,255,.06)}
.btn-danger{background:rgba(255,95,109,.1);border-color:rgba(255,95,109,.4);color:#ffb3b9}
.btn-block{width:100%;margin-top:10px}
.btn-tiny{padding:6px 11px;font-size:12px;border-radius:9px;background:rgba(255,255,255,.04);
  border:1px solid var(--line2);color:var(--muted)}
.btn-tiny:hover{color:var(--txt)}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.row-gap{display:flex;gap:10px;margin-top:16px}
.row-gap .btn{flex:1;margin-top:0}
.field{display:block;margin:0 0 13px}
.field>span{display:block;font-size:12px;color:var(--muted);margin-bottom:7px;letter-spacing:.02em}
.field em{color:var(--dim);font-style:normal;font-size:11px}
input,select,textarea{
  width:100%;padding:12px 14px;background:rgba(0,0,0,.35);border:1px solid var(--line2);
  border-radius:var(--r-sm);outline:none;transition:border-color .15s ease,background .15s ease}
input:focus,select:focus,textarea:focus{border-color:var(--gold);background:rgba(0,0,0,.5)}
textarea{resize:vertical;font-family:var(--mono);font-size:13.5px;line-height:1.7}
input::placeholder,textarea::placeholder{color:var(--dim)}
select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238a93a6' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center}
.check{display:flex;gap:11px;align-items:flex-start;margin:14px 0;font-size:13px;color:var(--muted);cursor:pointer}
.check input{width:17px;height:17px;flex:none;accent-color:var(--gold);margin-top:1px}
.err{background:rgba(255,95,109,.1);border:1px solid rgba(255,95,109,.32);color:#ffc2c7;
  padding:10px 13px;border-radius:var(--r-sm);font-size:13px;margin:10px 0}
.meter{height:4px;border-radius:3px;background:var(--line2);overflow:hidden;margin:-6px 0 14px}
.meter i{display:block;height:100%;width:0;background:var(--red);transition:width .25s ease,background .25s ease}
.tabs{display:flex;gap:6px;background:rgba(0,0,0,.34);padding:4px;border-radius:12px;margin-bottom:16px}
.tabs button{flex:1;padding:9px;border-radius:9px;font-size:13px;color:var(--muted)}
.tabs button.on{background:var(--raise);color:var(--txt);font-weight:620}
.seg{display:inline-flex;gap:4px;background:rgba(0,0,0,.34);padding:3px;border-radius:10px}
.seg button{padding:5px 10px;border-radius:8px;font-size:11.5px;color:var(--muted)}
.seg button.on{background:var(--raise);color:var(--txt)}

/* ─────────── seed grid ─────────── */
.seedgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:14px 0}
.seedgrid .w{display:flex;gap:8px;align-items:center;padding:9px 11px;background:rgba(0,0,0,.4);
  border:1px solid var(--line);border-radius:10px;font-family:var(--mono);font-size:13px}
.seedgrid .w i{color:var(--dim);font-style:normal;font-size:10.5px;min-width:14px;text-align:right}
.seedgrid.blur .w span{filter:blur(6px);user-select:none}
.revealrow{display:flex;gap:8px;align-items:center;margin-bottom:16px}

/* ─────────── app shell ─────────── */
.app{position:relative;z-index:2;min-height:100dvh;display:flex;flex-direction:column;
  max-width:1080px;margin:0 auto;padding:0 16px calc(84px + env(safe-area-inset-bottom))}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:16px 0 12px;position:sticky;top:0;z-index:5;
  background:linear-gradient(180deg,var(--bg) 70%,transparent)}
.top-actions{display:flex;align-items:center;gap:8px}
.pill{padding:7px 13px;border-radius:999px;border:1px solid var(--line2);background:rgba(255,255,255,.04);
  font-size:12px;font-weight:650;letter-spacing:.04em;color:var(--muted)}
.pill:hover{color:var(--txt)}
.icon-btn{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  border:1px solid var(--line2);background:rgba(255,255,255,.04);color:var(--muted)}
.icon-btn:hover{color:var(--txt);background:rgba(255,255,255,.08)}
.icon-btn .ic{width:18px;height:18px}
.main{flex:1;padding-bottom:20px}
.botnav{position:fixed;left:0;right:0;bottom:0;z-index:6;display:flex;
  background:rgba(10,12,17,.9);backdrop-filter:blur(18px);border-top:1px solid var(--line);
  padding:8px 6px calc(8px + env(safe-area-inset-bottom))}
.botnav button{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;
  padding:7px 4px;color:var(--dim);font-size:10.5px;letter-spacing:.02em;border-radius:12px}
.botnav button.on{color:var(--gold);background:rgba(240,196,83,.07)}
.botnav .ic{width:21px;height:21px}

/* ─────────── cards & rows ─────────── */
.card{background:linear-gradient(180deg,var(--surface),var(--bg2));border:1px solid var(--line);
  border-radius:var(--r);padding:18px;margin-bottom:14px}
.card h3{font-size:13px;color:var(--muted);font-weight:600;letter-spacing:.04em;text-transform:uppercase;margin-bottom:12px}
.hero{background:linear-gradient(155deg,rgba(240,196,83,.12),rgba(139,124,255,.06) 55%,transparent);
  border:1px solid var(--line2);border-radius:var(--r-lg);padding:22px;margin-bottom:16px;position:relative;overflow:hidden}
.hero .lbl{color:var(--muted);font-size:12px;letter-spacing:.05em;text-transform:uppercase}
.hero .total{font-size:38px;font-weight:760;letter-spacing:-.035em;margin:6px 0 2px;line-height:1.1}
.hero .sub{color:var(--muted);font-size:12.5px}
.hero .chg{display:inline-flex;align-items:center;gap:5px;margin-top:10px;font-size:12.5px;
  padding:4px 10px;border-radius:999px}
.chg.up{background:rgba(61,220,151,.12);color:var(--mint)}
.chg.down{background:rgba(255,95,109,.12);color:var(--red)}
.quick{display:flex;gap:10px;margin-bottom:16px}
.quick .btn{flex:1}
.asset{display:flex;align-items:center;gap:13px;padding:13px 15px;border:1px solid var(--line);
  border-radius:var(--r-sm);background:rgba(255,255,255,.015);margin-bottom:8px;
  transition:border-color .15s ease,transform .12s ease}
.asset:hover{border-color:var(--line2);transform:translateY(-1px)}
.asset .sym{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;flex:none;
  font-weight:750;font-size:14px;color:#0b0d12}
.asset .meta{flex:1;min-width:0}
.asset .meta b{display:block;font-size:14.5px}
.asset .meta span{color:var(--dim);font-size:11.5px}
.asset .amt{text-align:right;flex:none}
.asset .amt b{display:block;font-size:14.5px}
.asset .amt span{color:var(--dim);font-size:11.5px}
.tag{font-size:9.5px;padding:2px 7px;border-radius:6px;border:1px solid var(--line2);color:var(--dim);
  letter-spacing:.05em;text-transform:uppercase}
.addrbox{display:flex;gap:10px;align-items:center;background:rgba(0,0,0,.4);border:1px solid var(--line);
  border-radius:var(--r-sm);padding:12px 14px}
.addrbox code{flex:1;font-family:var(--mono);font-size:12.5px;word-break:break-all;color:var(--txt)}
.kv{display:flex;justify-content:space-between;gap:14px;padding:10px 0;border-bottom:1px solid var(--line);font-size:13.5px}
.kv:last-child{border-bottom:0}
.kv span{color:var(--muted)}
.kv b{font-weight:620;text-align:right}
.empty{text-align:center;color:var(--dim);padding:34px 16px;font-size:13.5px}
.skel{height:14px;border-radius:7px;background:linear-gradient(90deg,var(--surface2),var(--raise),var(--surface2));
  background-size:200% 100%;animation:sh 1.3s ease-in-out infinite}
@keyframes sh{0%{background-position:200% 0}100%{background-position:-200% 0}}
.spin{animation:sp .9s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* ─────────── toasts / modal ─────────── */
.toasts{position:fixed;left:0;right:0;bottom:calc(94px + env(safe-area-inset-bottom));z-index:20;
  display:flex;flex-direction:column;align-items:center;gap:8px;pointer-events:none;padding:0 16px}
.toast{background:var(--raise);border:1px solid var(--line2);border-radius:12px;padding:11px 16px;
  font-size:13.5px;box-shadow:var(--shadow);animation:up .22s ease;max-width:460px}
.toast.ok{border-color:rgba(61,220,151,.45)}
.toast.bad{border-color:rgba(255,95,109,.5);color:#ffc2c7}
@keyframes up{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.modal{position:fixed;inset:0;z-index:30;background:rgba(3,4,7,.72);backdrop-filter:blur(6px);
  display:grid;place-items:center;padding:20px}
.modal-card{width:100%;max-width:440px;background:linear-gradient(180deg,var(--surface),var(--bg2));
  border:1px solid var(--line2);border-radius:var(--r-lg);padding:24px;box-shadow:var(--shadow)}
.receipt{text-align:center}
.receipt .big{font-size:30px;font-weight:740;margin:8px 0;letter-spacing:-.03em}
.qr{background:#fff;padding:14px;border-radius:16px;display:inline-block;line-height:0}
.qr img,.qr canvas{display:block;width:210px;height:210px;image-rendering:pixelated}

/* ─────────── security phase + two-factor ─────────── */
.otp-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.shield-mark{width:40px;height:40px;border-radius:13px;display:grid;place-items:center;flex:none;
  background:linear-gradient(150deg,rgba(61,220,151,.18),rgba(76,201,240,.12));
  border:1px solid rgba(61,220,151,.32);color:var(--mint)}
.shield-mark .ic{width:20px;height:20px}
.code-input{font-family:var(--mono);font-size:24px;font-weight:600;letter-spacing:.34em;
  text-align:center;padding:14px 12px 14px 20px}
.meter.otp-meter{margin:-4px 0 14px}
.meter.otp-meter i{background:var(--mint);width:100%;transition:width .95s linear,background .25s ease}
.ph-lead{color:var(--txt);font-size:13.5px;margin:0 0 14px}
.quiz{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin:0 0 14px}
.quiz label{display:flex;flex-direction:column;gap:6px;font-size:11px;color:var(--dim);letter-spacing:.04em}
.quiz input{font-family:var(--mono);font-size:14px;text-align:center;padding:11px 6px}
.qrbox{background:#fff;border-radius:18px;padding:14px;display:grid;place-items:center;margin:0 0 14px}
.qrbox canvas{display:block;width:200px;height:200px;image-rendering:pixelated}
.keyrow{display:flex;align-items:center;gap:10px;justify-content:space-between;
  background:rgba(0,0,0,.42);border:1px solid var(--line);border-radius:var(--r-sm);padding:11px 13px;margin:0 0 14px}
.keyrow code{font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;word-break:break-all;color:var(--txt)}
.checkline{display:flex;gap:10px;align-items:flex-start;padding:11px 0;border-bottom:1px solid var(--line);font-size:13.5px}
.checkline:last-of-type{border-bottom:0}
.checkline div{flex:1;min-width:0}
.checkline .mk{flex:none;margin-top:1px;color:var(--mint);width:17px;height:17px}
.checkline div span{display:block;color:var(--dim);font-size:11.5px;margin-top:2px}
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;
  font-size:11.5px;font-weight:620;letter-spacing:.03em;background:rgba(61,220,151,.12);color:var(--mint)}
.badge.off{background:rgba(255,95,109,.12);color:#ffb3b9}
.badge.dim{background:rgba(255,255,255,.05);color:var(--muted)}
.card .btn+.btn{margin-top:10px}

@media (max-width:620px){
  .hero .total{font-size:32px}
  .seedgrid{grid-template-columns:repeat(2,1fr)}
  .gate-card{padding:22px}
  .brand h1{font-size:23px}
  .quick{flex-wrap:wrap}
  .quick .btn{min-width:calc(50% - 5px)}
}
@media (min-width:900px){
  .app{padding-bottom:28px}
  .botnav{position:static;background:none;border:0;backdrop-filter:none;justify-content:center;gap:8px;
    padding:12px 0 0;margin-top:auto}
  .botnav button{flex:none;flex-direction:row;gap:8px;padding:10px 16px;font-size:13px}
}