/* Clean trading-dashboard inspired styling — dark navy + accent colors */
:root {
  --bg-1: #0c1830;
  --bg-2: #04081a;
  --panel: #182645;
  --border: #2a3a60;
  --text: #f0f4fa;
  --text-soft: #aab8d4;
  --gold: #ffc83c;
  --ok: #3cd278;
  --err: #ea4e5f;
  --shadow: 0 10px 40px rgba(0,0,0,.4);
  --radius: 10px;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: linear-gradient(180deg, var(--bg-1), var(--bg-2));
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, system-ui, sans-serif;
  min-height: 100vh;
}

main {
  max-width: 560px;
  margin: 0 auto;
  padding: 60px 24px 40px;
}

header h1 {
  margin: 0 0 12px;
  font-size: 32px;
  letter-spacing: -0.5px;
}

header .lead {
  color: var(--text-soft);
  font-size: 16px;
  line-height: 1.55;
  margin: 0 0 18px;
}
header .lead.small {
  font-size: 14px;
  margin-bottom: 32px;
}
header .lead.small a {
  color: var(--gold);
  text-decoration: none;
  font-weight: 600;
}
header .lead.small a:hover { text-decoration: underline; }

form {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

label {
  display: block;
  margin-bottom: 20px;
  font-size: 14px;
  color: var(--text-soft);
}

input[type="text"] {
  display: block;
  width: 100%;
  margin-top: 8px;
  padding: 12px 14px;
  background: var(--bg-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 15px;
  letter-spacing: 0.5px;
}

input[type="text"]:focus {
  outline: 2px solid var(--gold);
  outline-offset: 1px;
  border-color: var(--gold);
}

label small {
  display: block;
  margin-top: 6px;
  color: var(--text-soft);
  font-size: 12px;
  opacity: 0.8;
}

button {
  display: block;
  width: 100%;
  margin-top: 8px;
  padding: 14px;
  background: var(--gold);
  color: #1a1a1a;
  font-weight: 700;
  font-size: 15px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: filter .15s;
}

button:hover:not(:disabled) { filter: brightness(1.1); }
button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.result {
  margin-top: 24px;
  padding: 16px 20px;
  border-radius: var(--radius);
  font-size: 15px;
  line-height: 1.55;
}
.result.ok  { background: rgba(60, 210, 120, 0.12); border: 1px solid rgba(60, 210, 120, 0.5); color: #b8ffd0; }
.result.err { background: rgba(234, 78, 95, 0.12);  border: 1px solid rgba(234, 78, 95, 0.5);  color: #ffc3c8; }
.hidden { display: none; }

footer {
  margin-top: 36px;
  color: var(--text-soft);
  font-size: 13px;
  text-align: center;
}
footer a { color: var(--gold); }

code {
  font-family: ui-monospace, monospace;
  background: var(--bg-2);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
}