:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --text: #1f2a37;
  --muted: #6b7280;
  --accent: #0369a1;
  --border: #dbe3ea;
  --danger: #b91c1c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: linear-gradient(180deg, #eef3fa 0%, #f9fbff 100%);
  color: var(--text);
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px;
}

h1 {
  margin: 0 0 18px;
}

h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
}

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

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.95rem;
}

input,
select,
button {
  font: inherit;
}

input,
select {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  background: #fff;
}

.actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  flex-wrap: wrap;
}

button {
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  padding: 9px 14px;
  cursor: pointer;
}

button.secondary {
  background: #4b5563;
}

button.delete {
  background: var(--danger);
  padding: 5px 8px;
}

.table-wrap {
  margin-top: 12px;
  overflow-x: auto;
}

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

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

th {
  color: var(--muted);
  font-weight: 600;
}

.message {
  min-height: 1.5rem;
  color: var(--danger);
  margin: 12px 0;
}

.summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  margin-bottom: 12px;
}

.metric {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
}

.metric strong {
  display: block;
  font-size: 1.05rem;
}

.small-note {
  color: var(--muted);
  font-size: 0.9rem;
}