:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --accent: #174ea6;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #dbe3ef;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

header {
  text-align: center;
  margin-bottom: 24px;
}

h1 {
  margin: 0 0 8px;
  color: var(--accent);
}

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

.layout {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.05);
}

.grid {
  display: grid;
  gap: 14px;
}

label span {
  display: block;
  font-size: 14px;
  margin-bottom: 6px;
}

input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  font-size: 15px;
}

.actions {
  display: flex;
  gap: 12px;
  margin-top: 18px;
}

button {
  border: none;
  border-radius: 10px;
  padding: 11px 16px;
  font-size: 15px;
  cursor: pointer;
  background: var(--accent);
  color: white;
}

button.secondary {
  background: #64748b;
}

.chart-panel canvas {
  width: 100%;
  max-width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fcfdff;
}

.status {
  margin: 12px 0 0;
  color: var(--muted);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}

.metric {
  padding: 14px;
  border-radius: 12px;
  background: #eef4ff;
  border: 1px solid #d7e4ff;
}

.table-wrapper {
  overflow-x: auto;
}

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

th, td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  text-align: center;
}

th {
  background: #f8fafc;
}

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

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

  .metrics {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .actions,
  .metrics {
    grid-template-columns: 1fr;
    display: grid;
  }
}