:root {
  --bg: #0B0E13;
  --bg-panel: #12161D;
  --bg-panel-raised: #171C25;
  --border: #232935;
  --text: #E6E9EF;
  --text-dim: #8890A0;
  --text-faint: #4B5262;
  --accent: #F7931A;
  --accent-dim: rgba(247, 147, 26, 0.14);
  --accent-glow: rgba(247, 147, 26, 0.35);
  --green: #35C77E;
  --red: #FF5C5C;
  --font-display: 'JetBrains Mono', monospace;
  --font-body: 'IBM Plex Mono', monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  min-height: 100vh;
}

body {
  background-image:
    radial-gradient(circle at 15% 0%, rgba(247,147,26,0.06), transparent 40%),
    radial-gradient(circle at 85% 20%, rgba(247,147,26,0.04), transparent 35%);
}

.scanline {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255,255,255,0.012),
    rgba(255,255,255,0.012) 1px,
    transparent 1px,
    transparent 3px
  );
  z-index: 1;
}

.topbar {
  border-bottom: 1px solid var(--border);
  background: rgba(11,14,19,0.9);
  position: sticky;
  top: 0;
  z-index: 5;
  backdrop-filter: blur(6px);
}
.topbar-inner {
  max-width: 880px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); }
.brand-mark { color: var(--accent); font-size: 18px; }
.brand-name { font-weight: 800; letter-spacing: 0.02em; font-size: 15px; }
.brand-accent { color: var(--accent); }
.net-tag {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  background: var(--accent-dim);
  padding: 4px 10px;
  border-radius: 3px;
}

main {
  max-width: 880px;
  margin: 0 auto;
  padding: 56px 24px 40px;
  position: relative;
  z-index: 2;
}

.hero { margin-bottom: 40px; }
.eyebrow {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  margin: 0 0 14px;
  text-transform: uppercase;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: 34px;
  line-height: 1.25;
  font-weight: 800;
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}
.hero h1 .accent { color: var(--accent); }
.hero-sub {
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.6;
  max-width: 560px;
  margin: 0;
}

/* signature element: horizontal chain of blocks */
.chain-strip {
  border: 1px solid var(--border);
  background: var(--bg-panel);
  border-radius: 6px;
  padding: 18px;
  margin-bottom: 32px;
  overflow-x: auto;
}
.chain-track {
  display: flex;
  align-items: center;
  gap: 0;
  min-height: 64px;
}
.block-node {
  flex: 0 0 auto;
  width: 116px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  background: var(--bg-panel-raised);
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: relative;
}
.block-node + .block-node { margin-left: 22px; }
.block-node + .block-node::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 50%;
  width: 22px;
  height: 1px;
  background: repeating-linear-gradient(to right, var(--text-faint) 0 4px, transparent 4px 8px);
}
.block-node.genesis { border-color: var(--accent-dim); }
.block-node.new {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-glow), 0 0 16px var(--accent-glow);
  animation: settle 0.5s ease-out;
}
@keyframes settle {
  from { transform: translateY(-6px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
.block-label {
  font-family: var(--font-display);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--accent);
}
.block-node.genesis .block-label { color: var(--text-dim); }
.block-sub {
  font-size: 10px;
  color: var(--text-faint);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.panel-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 20px;
}
@media (max-width: 680px) {
  .panel-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 26px; }
}

.panel {
  border: 1px solid var(--border);
  background: var(--bg-panel);
  border-radius: 6px;
  padding: 20px;
}
.panel-head { margin-bottom: 18px; }
.panel-title {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-faint);
}

form label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 8px;
}
#address {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 13px;
  padding: 12px 14px;
  border-radius: 4px;
  outline: none;
  transition: border-color 0.15s;
}
#address:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

button[type="submit"] {
  width: 100%;
  margin-top: 14px;
  background: var(--accent);
  color: #14100A;
  border: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.06em;
  padding: 13px 16px;
  border-radius: 4px;
  cursor: pointer;
  transition: filter 0.15s, transform 0.1s;
}
button[type="submit"]:hover { filter: brightness(1.08); }
button[type="submit"]:active { transform: translateY(1px); }
button[type="submit"]:disabled {
  background: var(--bg-panel-raised);
  color: var(--text-faint);
  cursor: not-allowed;
}
button:focus-visible, a:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.hint {
  font-size: 11px;
  color: var(--text-faint);
  margin: 10px 0 0;
}

.result-box {
  margin-top: 18px;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}
.result-box.hidden { display: none; }
.result-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 0;
  font-size: 12.5px;
}
.result-key { color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.06em; font-size: 10.5px; padding-top: 2px; }
.result-val { color: var(--text); text-align: right; }
.mono-break { word-break: break-all; max-width: 65%; }
.explorer-link {
  display: inline-block;
  margin-top: 10px;
  color: var(--accent);
  text-decoration: none;
  font-size: 12.5px;
}
.explorer-link.hidden { display: none; }
.explorer-link:hover { text-decoration: underline; }

.wallet-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 12.5px;
}
.wallet-row:last-of-type { border-bottom: none; }
.wallet-key { color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.06em; font-size: 10.5px; padding-top: 2px; }
.wallet-val { color: var(--text); text-align: right; }
.wallet-note {
  margin-top: 14px;
  font-size: 11.5px;
  color: var(--text-faint);
  line-height: 1.5;
}

footer {
  max-width: 880px;
  margin: 0 auto;
  padding: 24px;
  color: var(--text-faint);
  font-size: 11px;
  text-align: center;
}

@media (prefers-reduced-motion: reduce) {
  .block-node.new { animation: none; }
}