/* Koinos Bio Wallet — one screen, one button. Koinos family colors. */
:root {
  --bg: #121212;
  --card: #1e1830;
  --inset: #16121f;
  --line: #322a45;
  --line-strong: #4a3d68;
  --text: #d4d4d4;
  --dim: #9d94b5;
  --bright: #ffffff;
  --accent: #9966ff;
  --accent-soft: #b795ff;
  --grad-a: #7827e6;
  --grad-b: #8e44ad;
  --good: #4ade80;
  --warn: #fbbf24;
  --bad: #f87171;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh; display: flex; flex-direction: column;
}
a { color: var(--accent-soft); text-decoration: none; }
a:hover { text-decoration: underline; }

.top {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px; border-bottom: 1px solid var(--line);
  position: sticky; top: 0; background: rgba(18,18,18,.86); backdrop-filter: blur(10px); z-index: 5;
}
.brand { font-weight: 600; color: var(--bright); display: flex; align-items: center; gap: 8px; }
.brand strong { color: var(--accent-soft); font-weight: 800; }
.top-right { display: flex; align-items: center; gap: 12px; }
.badge {
  font-size: .7rem; font-weight: 700; letter-spacing: .07em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line-strong); color: var(--accent-soft);
}
.badge.demo { color: var(--warn); border-color: rgba(251,191,36,.4); }
.linkish { background: none; border: 0; color: var(--dim); cursor: pointer; font-size: .9rem; }
.linkish:hover { color: var(--bad); }

main { flex: 1; width: 100%; max-width: 560px; margin: 0 auto; padding: 26px 18px 40px; }

/* ── landing ── */
.landing { text-align: center; padding-top: 7vh; }
.emblem {
  width: 108px; height: 108px; margin: 0 auto 26px; border-radius: 32px;
  display: grid; place-items: center; color: #fff;
  background: linear-gradient(135deg, var(--grad-a), var(--grad-b));
  box-shadow: 0 18px 50px rgba(120,39,230,.4);
}
.landing h1 { color: var(--bright); font-size: clamp(2rem, 7vw, 2.9rem); line-height: 1.12; margin: 0 0 14px; letter-spacing: -.02em; }
.landing h1 em { font-style: normal; background: linear-gradient(90deg, var(--accent), #d9c5ff); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { color: var(--dim); max-width: 430px; margin: 0 auto 30px; }

.cta {
  font: 700 1.15rem/1 system-ui, sans-serif; color: #fff; cursor: pointer;
  background: linear-gradient(90deg, var(--grad-a), var(--grad-b));
  border: 0; border-radius: 14px; padding: 18px 38px;
  transition: transform .12s, box-shadow .12s, filter .12s;
}
.cta:hover { filter: brightness(1.12); transform: translateY(-1px); box-shadow: 0 8px 30px rgba(120,39,230,.4); }
.cta:disabled { opacity: .55; cursor: not-allowed; transform: none; box-shadow: none; }
.cta.small { font-size: 1rem; padding: 13px 26px; border-radius: 11px; width: 100%; margin-top: 4px; }
.ghost {
  font: 600 .95rem/1 system-ui, sans-serif; color: var(--text); cursor: pointer;
  background: transparent; border: 1px solid var(--line-strong); border-radius: 10px; padding: 11px 18px;
}
.ghost:hover { border-color: var(--accent); color: var(--bright); }

.alt { margin-top: 18px; font-size: .92rem; color: var(--dim); }
.unsupported, .note { margin-top: 22px; font-size: .9rem; color: var(--warn); }
.note { color: var(--dim); }

/* ── wallet ── */
.wallet { display: flex; flex-direction: column; gap: 14px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 18px; }
.card .k { font-size: .74rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--dim); display: flex; align-items: center; gap: 10px; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.stat .v { color: var(--bright); font-size: 1.6rem; font-weight: 800; margin-top: 4px; }
.hint { font-size: .82rem; color: var(--dim); }

.addr-card { text-align: center; }
.addr {
  display: block; width: 100%; margin: 10px 0 6px; padding: 12px; cursor: pointer;
  font: 600 .95rem/1.4 ui-monospace, "SF Mono", Menlo, monospace; color: var(--accent-soft);
  background: var(--inset); border: 1px solid var(--line-strong); border-radius: 12px;
  word-break: break-all;
}
.addr:hover { border-color: var(--accent); }

label { display: block; margin: 12px 0; font-size: .85rem; font-weight: 600; color: var(--dim); }
input {
  display: block; width: 100%; margin-top: 6px; padding: 12px 14px;
  font: 500 1rem/1.3 inherit; color: var(--bright);
  background: var(--inset); border: 1px solid var(--line-strong); border-radius: 10px;
}
input:focus { outline: none; border-color: var(--accent); }

.free-chip { font-size: .68rem; font-weight: 800; color: var(--good); border: 1px solid rgba(74,222,128,.35); border-radius: 999px; padding: 2px 8px; letter-spacing: .05em; }

.status { margin: 10px 0 4px; padding: 12px 14px; border-radius: 10px; background: var(--inset); border: 1px solid var(--line); font-size: .92rem; }
.status.ok { border-color: rgba(74,222,128,.4); }
.status.err { border-color: rgba(248,113,113,.45); color: var(--bad); }
.status a { font-weight: 600; }

.wif {
  margin-top: 12px; padding: 12px; border-radius: 10px; word-break: break-all;
  font: 600 .88rem/1.5 ui-monospace, Menlo, monospace; color: var(--warn);
  background: var(--inset); border: 1px dashed rgba(251,191,36,.5);
}

footer {
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 16px 20px; border-top: 1px solid var(--line); font-size: .85rem; color: var(--dim);
}

@media (max-width: 440px) { .row { grid-template-columns: 1fr; } }