:root {
  --bg: #f3f5f7;
  --panel: #ffffff;
  --text: #102232;
  --muted: #5c6b77;
  --primary: #0b5fb5;
  --danger: #a32424;
  --line: #dbe2e8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(180deg, #f2f6fa 0%, #eef2f5 100%);
  color: var(--text);
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 20px;
}

.hero {
  margin-bottom: 12px;
}

.hero h1 {
  margin: 0 0 6px;
  font-size: 2rem;
}

.hero p {
  margin: 0;
  color: var(--muted);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  margin: 12px 0;
  box-shadow: 0 6px 18px rgba(16, 34, 50, 0.06);
}

.hidden {
  display: none;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
}

input,
select,
button {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 1rem;
  padding: 10px 12px;
}

button {
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  cursor: pointer;
}

button:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.row {
  margin-bottom: 12px;
}

.row.two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  background: #f9fcff;
}

.card h3 {
  margin: 0 0 8px;
}

.grid3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  border: 1px solid var(--line);
  padding: 8px;
  text-align: right;
}

th:first-child,
td:first-child {
  text-align: left;
}

pre {
  margin: 0;
  background: #0f1720;
  color: #dbe7f3;
  border-radius: 8px;
  padding: 12px;
  white-space: pre-wrap;
  line-height: 1.35;
}

#status {
  margin-top: 8px;
  color: var(--muted);
  min-height: 20px;
}

.error {
  margin-top: 10px;
  color: var(--danger);
}

@media (max-width: 860px) {
  .grid3 {
    grid-template-columns: 1fr;
  }
  .row.two {
    grid-template-columns: 1fr;
  }
}