:root {
  --bg: #f2f5f8;
  --card: #ffffff;
  --text: #13293d;
  --muted: #4f6473;
  --line: #d8e1e8;
  --accent: #176087;
  --accent-strong: #124d6d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 20% 10%, #ffffff, var(--bg));
}

.container {
  max-width: 1100px;
  margin: 24px auto;
  padding: 0 16px 24px;
  display: grid;
  gap: 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 6px 18px rgba(19, 41, 61, 0.06);
}

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

.tab-btn {
  min-width: 110px;
  background: var(--accent);
  color: #fff;
}

.page {
  display: none;
  gap: 16px;
}

.page.active {
  display: grid;
}

h1,
h2 {
  margin: 0 0 10px;
}

.subtitle {
  margin-top: 4px;
  color: var(--muted);
}

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  margin: 12px 0;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 14px;
}

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

.actions {
  display: flex;
  gap: 10px;
  margin: 10px 0;
}

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

button:hover {
  background: var(--accent-strong);
}

button.secondary {
  background: #8796a3;
}

.status {
  font-size: 14px;
  color: var(--muted);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
}

th,
td {
  border: 1px solid var(--line);
  padding: 8px;
  text-align: left;
  font-size: 14px;
}

th {
  background: #eef4f8;
}

.empty {
  color: var(--muted);
  font-size: 14px;
}

.error {
  color: #a11a1a;
}

.chart-wrap {
  position: relative;
  width: 100%;
  height: 300px;
  margin: 8px 0 14px;
}

.chart-wrap canvas {
  width: 100% !important;
  height: 100% !important;
}