:root {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --accent: #1f5eff;
  --ink: #182026;
  --line: #d8dee6;
  --ok: #0d8a45;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: radial-gradient(circle at top right, #e9f0ff, var(--bg) 45%);
  color: var(--ink);
}

.hidden {
  display: none;
}

.screen {
  min-height: 100vh;
}

.card {
  max-width: 420px;
  margin: 14vh auto;
  padding: 24px;
  border-radius: 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 14px 28px rgba(24, 32, 38, 0.08);
}

button {
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  padding: 10px 14px;
  cursor: pointer;
}

button.secondary {
  background: #d9e4ff;
  color: #123;
}

.error {
  color: #b11717;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.topbar h2 {
  margin: 0;
}

.topbar p {
  margin: 3px 0 0;
  color: #5e6a76;
  font-size: 13px;
}

.actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.tabs {
  display: flex;
  gap: 8px;
  padding: 10px 18px;
  border-bottom: 1px solid var(--line);
  background: #f9fbfe;
}

.tabs button {
  background: #e7edf8;
  color: #1c2b38;
}

.tabs button.active {
  background: var(--ink);
  color: white;
}

.toolbar {
  display: flex;
  gap: 8px;
  padding: 10px 18px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 10px;
  padding: 0 18px 18px;
}

.left,
.right {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  overflow: auto;
  min-height: 68vh;
}

.right {
  padding: 14px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th,
td {
  border-bottom: 1px solid #eef2f7;
  padding: 8px;
  text-align: left;
  vertical-align: top;
}

thead {
  position: sticky;
  top: 0;
  background: #f7faff;
}

tr:hover {
  background: #f4f8ff;
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  background: #e7eef9;
}

.badge.ok {
  background: #d7f1e2;
  color: var(--ok);
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .right {
    min-height: 35vh;
  }
}