/* ============================================================
   PAPERHAND — ETH chain. Dark, degen-native, terminal-flavored.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&display=swap');

:root{
  --bg:#0a0e14;
  --bg-2:#0e141c;
  --panel:#111923;
  --panel-2:#16202c;
  --ink:#e9ecf5;
  --muted:#8a90a6;
  --line:rgba(255,255,255,.08);
  --eth:#23a8e0;
  --eth-glow:rgba(35,168,224,.45);
  --red:#ff4d4d;
  --red-soft:#ff8a8a;
  --green:#27d796;
  --gold:#ffcf3a;
  --display:-apple-system,BlinkMacSystemFont,'Segoe UI',Helvetica,Arial,sans-serif;
  --mono:'Space Mono',monospace;
  --radius:18px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--mono);
  line-height:1.5;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

/* atmospheric background */
body::before{
  content:"";position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(900px 600px at 78% -8%, rgba(35,168,224,.20), transparent 60%),
    radial-gradient(700px 500px at 8% 18%, rgba(255,77,77,.10), transparent 55%),
    radial-gradient(circle at 50% 120%, rgba(39,215,150,.08), transparent 50%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;opacity:.5;
  background-image:
    linear-gradient(var(--line) 1px,transparent 1px),
    linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:54px 54px;
  mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 75%);
}

.wrap{max-width:1120px;margin:0 auto;padding:0 22px}

/* ---------- nav ---------- */
nav{
  position:sticky;top:0;z-index:50;
  backdrop-filter:blur(14px);
  background:rgba(10,11,16,.7);
  border-bottom:1px solid var(--line);
}
nav .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--display);font-weight:600;font-size:17px;letter-spacing:-.3px}
.brand .eth-mark{width:22px;height:30px;display:inline-block;filter:drop-shadow(0 0 8px var(--eth-glow))}
.brand .eth-mark svg{width:100%;height:100%}
.brand b{color:var(--eth)}
.nav-links{display:flex;gap:26px;align-items:center}
.nav-links a{color:var(--muted);text-decoration:none;font-size:13px;text-transform:uppercase;letter-spacing:1px;transition:.2s}
.nav-links a:hover{color:var(--ink)}
.btn{
  font-family:var(--mono);font-weight:700;font-size:13px;
  text-transform:uppercase;letter-spacing:1px;cursor:pointer;
  border:1px solid var(--eth);color:#fff;
  background:linear-gradient(180deg,var(--eth),#4960c9);
  padding:11px 20px;border-radius:12px;text-decoration:none;
  box-shadow:0 6px 20px -6px var(--eth-glow);transition:.2s;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 28px -8px var(--eth-glow)}
.btn.ghost{background:transparent;border-color:var(--line);color:var(--ink);box-shadow:none}
.btn.ghost:hover{border-color:var(--eth)}
.btn.red{background:linear-gradient(180deg,var(--red),#cc2e2e);border-color:var(--red);box-shadow:0 6px 20px -6px rgba(255,77,77,.5)}

/* main interactive button (hero) — hook your wallet/connect logic here */
.interact-button{
  font-family:var(--mono);font-weight:700;font-size:14px;
  text-transform:uppercase;letter-spacing:1px;cursor:pointer;
  color:#fff;border:1px solid var(--eth);
  background:linear-gradient(180deg,var(--eth),#4960c9);
  padding:14px 30px;border-radius:12px;
  box-shadow:0 8px 26px -8px var(--eth-glow);
  transition:.2s;position:relative;overflow:hidden;
}
.interact-button:hover{transform:translateY(-2px);box-shadow:0 14px 34px -10px var(--eth-glow)}
.interact-button:active{transform:translateY(0)}
.interact-button::after{
  content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.25),transparent);
  transform:skewX(-20deg);transition:.5s;
}
.interact-button:hover::after{left:130%}

/* ---------- hero ---------- */
.hero{position:relative;padding:90px 0 60px;text-align:center}
.tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:1.5px;text-transform:uppercase;color:var(--eth);
  border:1px solid rgba(35,168,224,.4);border-radius:999px;
  padding:7px 16px;margin-bottom:28px;background:rgba(35,168,224,.07)
}
.tag .dot{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 10px var(--green);animation:pulse 1.6s infinite}
@keyframes pulse{50%{opacity:.3}}
.hero h1{
  font-family:var(--display);font-weight:600;
  font-size:clamp(30px,5vw,52px);line-height:1.05;letter-spacing:-1px;
  margin-bottom:22px;
}
.hero h1 .bleed{
  color:var(--red);
  background:linear-gradient(180deg,var(--red-soft),var(--red));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  text-shadow:0 0 40px rgba(255,77,77,.3)
}
.hero p.sub{max-width:600px;margin:0 auto 38px;color:var(--muted);font-size:17px}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* floating coin marquee */
.coinstrip{
  display:flex;gap:38px;justify-content:center;flex-wrap:wrap;
  margin-top:64px;opacity:.9
}
.coinstrip .coin{
  width:46px;height:46px;border-radius:50%;overflow:hidden;
  border:1px solid var(--line);background:var(--panel);
  display:grid;place-items:center;
  animation:bob 4s ease-in-out infinite;
}
.coinstrip .coin svg{width:100%;height:100%}
.coinstrip .coin:nth-child(2){animation-delay:.4s}
.coinstrip .coin:nth-child(3){animation-delay:.8s}
.coinstrip .coin:nth-child(4){animation-delay:1.2s}
.coinstrip .coin:nth-child(5){animation-delay:1.6s}
.coinstrip .coin:nth-child(6){animation-delay:2s}
@keyframes bob{50%{transform:translateY(-10px)}}

/* ---------- calculator card ---------- */
section{padding:70px 0}
.section-head{text-align:center;margin-bottom:46px}
.section-head .kicker{color:var(--eth);font-size:12px;letter-spacing:2px;text-transform:uppercase}
.section-head h2{font-family:var(--display);font-weight:600;font-size:clamp(22px,3.5vw,32px);letter-spacing:-.5px;margin-top:10px}
.section-head p{color:var(--muted);max-width:560px;margin:14px auto 0}

.calc{
  background:linear-gradient(180deg,var(--panel),var(--bg-2));
  border:1px solid var(--line);border-radius:var(--radius);
  padding:34px;max-width:760px;margin:0 auto;
  box-shadow:0 30px 80px -40px rgba(0,0,0,.9);
  position:relative;overflow:hidden;
}
.calc::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,var(--eth),var(--red),transparent)}
.calc .row{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:18px}
@media(max-width:560px){.calc .row{grid-template-columns:1fr}}
.field label{display:block;font-size:11px;letter-spacing:1px;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.field input,.field select{
  width:100%;background:var(--bg);border:1px solid var(--line);
  color:var(--ink);font-family:var(--mono);font-size:15px;
  padding:13px 14px;border-radius:11px;transition:.2s;
}
.field input:focus,.field select:focus{outline:none;border-color:var(--eth);box-shadow:0 0 0 3px rgba(35,168,224,.15)}
.calc .btn{width:100%;margin-top:8px;padding:15px;font-size:15px}

.result{
  margin-top:26px;padding:26px;border-radius:14px;text-align:center;
  background:rgba(255,77,77,.06);border:1px dashed rgba(255,77,77,.35);
  display:none;
}
.result.show{display:block;animation:popin .4s ease}
@keyframes popin{from{opacity:0;transform:scale(.96)}}
.result .label{font-size:12px;letter-spacing:1px;text-transform:uppercase;color:var(--red-soft)}
.result .big{font-family:var(--display);font-weight:600;font-size:clamp(30px,6vw,52px);color:var(--red);line-height:1;margin:10px 0;text-shadow:0 0 30px rgba(255,77,77,.3)}
.result .sub{color:var(--muted);font-size:14px}

/* ---------- how it works ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:760px){.steps{grid-template-columns:1fr}}
.step{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;position:relative;transition:.25s;
}
.step:hover{transform:translateY(-5px);border-color:var(--eth);box-shadow:0 20px 50px -30px var(--eth-glow)}
.step .n{font-family:var(--display);font-weight:600;font-size:34px;color:var(--eth);opacity:.35;line-height:1}
.step h3{font-family:var(--display);font-weight:600;font-size:17px;margin:10px 0 8px}
.step p{color:var(--muted);font-size:14px}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media(max-width:760px){.stats{grid-template-columns:1fr 1fr}}
.stat{background:var(--panel-2);border:1px solid var(--line);border-radius:14px;padding:24px;text-align:center}
.stat .v{font-family:var(--display);font-weight:600;font-size:26px;color:var(--gold)}
.stat .k{color:var(--muted);font-size:12px;letter-spacing:1px;text-transform:uppercase;margin-top:6px}

/* ---------- cta band ---------- */
.band{
  background:linear-gradient(120deg,rgba(35,168,224,.14),rgba(255,77,77,.10));
  border:1px solid var(--line);border-radius:24px;padding:54px;text-align:center;
}
.band h2{font-family:var(--display);font-weight:600;font-size:clamp(28px,5vw,42px);letter-spacing:-1px}
.band p{color:var(--muted);margin:14px auto 28px;max-width:480px}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:40px 0;margin-top:40px;color:var(--muted);font-size:13px}
footer .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px}
footer a{color:var(--muted);text-decoration:none}
footer a:hover{color:var(--eth)}

.mono-note{font-size:12px;color:var(--muted)}
.fade{opacity:0;transform:translateY(24px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.fade.in{opacity:1;transform:none}