:root {
  --bg-0: #0a0a14;
  --bg-1: #131325;
  --bg-2: #1a1a32;
  --border: rgba(168, 85, 247, 0.18);
  --border-strong: rgba(168, 85, 247, 0.35);
  --text-1: #f5f5fa;
  --text-2: #c7c7d8;
  --text-3: #8a8aa5;
  --accent: #a855f7;
  --accent-cyan: #22d3ee;
  --good: #34d399;
  --warn: #fbbf24;
  --bad: #f87171;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: radial-gradient(circle at 20% 0%, #1a1240 0%, var(--bg-0) 60%);
  color: var(--text-1);
  font-family: var(--font);
  min-height: 100vh;
  line-height: 1.5;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border);
  max-width: 1200px;
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  text-decoration: none;
  color: inherit;
}
.brand-mark {
  font-weight: 800;
  font-size: 1.4rem;
  background: linear-gradient(90deg, var(--accent), var(--accent-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: 0.04em;
}
.brand-tool {
  font-size: 0.95rem;
  color: var(--text-3);
}
nav a {
  color: var(--text-2);
  text-decoration: none;
  margin-left: 1.5rem;
  font-size: 0.95rem;
}
nav a:hover { color: var(--text-1); }

main {
  max-width: 920px;
  margin: 0 auto;
  padding: 3rem 2rem 4rem;
}

.hero {
  text-align: center;
  margin-bottom: 2.5rem;
}
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: 0 0 0.75rem 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.tagline {
  color: var(--text-2);
  font-size: 1.05rem;
  margin: 0;
}

.quote-form {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.5rem;
  margin-bottom: 2rem;
}
form .row { display: flex; gap: 1rem; margin-bottom: 1rem; }
form .row.pair { display: grid; grid-template-columns: 1fr 1fr 1fr; }
form label {
  display: flex;
  flex-direction: column;
  flex: 1;
  font-size: 0.85rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  gap: 0.35rem;
}
form input, form select {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.7rem 0.9rem;
  color: var(--text-1);
  font-family: var(--font);
  font-size: 1rem;
}
form input:focus, form select:focus {
  outline: none;
  border-color: var(--accent);
}
form button {
  width: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-cyan));
  color: var(--bg-0);
  border: none;
  border-radius: 12px;
  padding: 0.9rem 1.5rem;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.15s ease;
}
form button:hover { transform: translateY(-1px); }
form button:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.hint {
  font-size: 0.85rem;
  color: var(--text-3);
  margin: 0.75rem 0 0 0;
}

.results { margin-bottom: 3rem; }
.results.hidden { display: none; }
.status {
  color: var(--text-2);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  text-align: center;
}
.status.error { color: var(--bad); }

.quote-cards {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: 1fr;
}
.quote-card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.25rem 1.5rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1.25rem;
  align-items: center;
}
.quote-card.best {
  border-color: var(--good);
  background: linear-gradient(135deg, rgba(52, 211, 153, 0.06), var(--bg-1));
}
.quote-card.pending {
  opacity: 0.6;
  border-style: dashed;
}
.quote-source {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-1);
  min-width: 90px;
}
.quote-source .best-badge {
  display: inline-block;
  margin-left: 0.5rem;
  padding: 0.15rem 0.5rem;
  background: var(--good);
  color: var(--bg-0);
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.quote-amount { font-family: var(--mono); font-size: 1.1rem; color: var(--text-1); }
.quote-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-3);
  margin-top: 0.3rem;
  flex-wrap: wrap;
}
.quote-action {
  display: inline-block;
  padding: 0.55rem 1rem;
  background: var(--bg-2);
  color: var(--text-1);
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  text-decoration: none;
  font-size: 0.9rem;
  white-space: nowrap;
}
.quote-action:hover { border-color: var(--accent); }
.quote-card.pending .quote-action { pointer-events: none; opacity: 0.5; }

.agent-section, .tip-section {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.5rem 1.75rem;
  margin-bottom: 1.5rem;
}
.agent-section h2, .tip-section h2 {
  margin: 0 0 0.5rem 0;
  font-size: 1.2rem;
}
.agent-section p, .tip-section p {
  color: var(--text-2);
  margin: 0.5rem 0;
  font-size: 0.95rem;
}
.agent-section pre {
  background: var(--bg-0);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  overflow-x: auto;
  margin: 1rem 0;
}
.agent-section code {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent-cyan);
}
.agent-section a, .tip-section a { color: var(--accent-cyan); }

.tip-addresses { display: grid; gap: 0.6rem; margin-top: 1rem; }
.tip-address-row {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 0.75rem;
  align-items: center;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.6rem 0.85rem;
}
.tip-address-row .tip-chain {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-3);
}
.tip-address-row .tip-addr {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-1);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.tip-address-row button.copy-btn {
  background: var(--bg-1);
  border: 1px solid var(--border);
  color: var(--text-2);
  border-radius: 6px;
  padding: 0.35rem 0.7rem;
  font-size: 0.8rem;
  cursor: pointer;
}
.tip-address-row button.copy-btn:hover { color: var(--text-1); border-color: var(--accent); }
.tip-address-row .tip-pending {
  font-size: 0.85rem;
  color: var(--warn);
  font-style: italic;
}
.tip-loading { color: var(--text-3); font-style: italic; font-size: 0.9rem; }

footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-3);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  max-width: 1200px;
  margin: 0 auto;
}
footer a { color: var(--text-2); text-decoration: none; }
footer a:hover { color: var(--text-1); }
footer .sep { margin: 0 0.75rem; opacity: 0.5; }

@media (max-width: 720px) {
  header { padding: 1rem 1.25rem; }
  nav a { margin-left: 1rem; font-size: 0.85rem; }
  main { padding: 2rem 1.25rem; }
  form .row.pair { grid-template-columns: 1fr; }
  .quote-card { grid-template-columns: 1fr; text-align: left; }
  .quote-action { justify-self: start; }
}