:root {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --text: #1e2530;
  --muted: #6b7687;
  --border: #d8dee6;
  --accent: #0e6ba8;
  --accent-ink: #ffffff;
  --hover: #eff6fc;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top right, #d9edf8, transparent 40%), var(--bg);
}

.shell {
  max-width: 1300px;
  margin: 0 auto;
  padding: 20px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.topbar h1 {
  margin: 0;
  font-size: 1.8rem;
}

.sub {
  margin: 4px 0 0;
  color: var(--muted);
}

.card,
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.card {
  padding: 20px;
  margin-top: 18px;
  max-width: 440px;
}

.form {
  display: grid;
  gap: 10px;
}

.form label {
  display: grid;
  gap: 5px;
  font-size: 0.95rem;
}

input {
  padding: 9px 11px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.button {
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 10px 14px;
  font-weight: 600;
  cursor: pointer;
}

.button.ghost {
  background: #e8eef5;
  color: #2a3a4e;
}

.portal {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(220px, 1fr));
  gap: 12px;
}

.panel {
  padding: 12px;
  min-height: 220px;
}

.panel h3 {
  margin-top: 0;
  margin-bottom: 10px;
}

.panel.wide {
  grid-column: span 3;
}

.list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
  max-height: 260px;
  overflow: auto;
}

.list button {
  width: 100%;
  text-align: left;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  padding: 8px;
  cursor: pointer;
}

.list button:hover {
  background: var(--hover);
}

.detail {
  white-space: pre-wrap;
  font-family: Consolas, "Courier New", monospace;
  max-height: 320px;
  overflow: auto;
}

.muted {
  color: var(--muted);
}

.status {
  margin-top: 10px;
  min-height: 20px;
  color: #9c2e2e;
}

.hidden {
  display: none !important;
}

@media (max-width: 1000px) {
  .portal {
    grid-template-columns: 1fr;
  }

  .panel.wide {
    grid-column: span 1;
  }
}