* {
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  margin: 0;
  background: #f5f7fb;
  color: #111827;
}

header {
  background: #111827;
  color: #fff;
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header h1 {
  margin: 0;
  font-size: 20px;
}

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

button {
  border: none;
  background: #2563eb;
  color: white;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background: #1d4ed8;
}

main {
  max-width: 1200px;
  margin: 16px auto;
  padding: 0 12px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.stat-card {
  background: white;
  border-radius: 10px;
  padding: 16px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.stat-card h3 {
  margin: 0;
  font-size: 14px;
  color: #4b5563;
}

.stat-card p {
  margin: 8px 0 0;
  font-size: 28px;
  font-weight: bold;
}

.panels,
.charts {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.panel {
  background: white;
  border-radius: 10px;
  padding: 16px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

textarea,
input {
  width: 100%;
  margin-top: 8px;
  margin-bottom: 8px;
  padding: 10px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
}

.inline-inputs {
  display: grid;
  grid-template-columns: 1fr 100px auto;
  gap: 8px;
  align-items: center;
}

pre {
  margin: 0;
  margin-top: 8px;
  padding: 12px;
  border-radius: 8px;
  background: #0f172a;
  color: #e2e8f0;
  font-size: 12px;
  min-height: 120px;
  white-space: pre-wrap;
  word-wrap: break-word;
}

canvas {
  height: 280px !important;
}

.auth-page {
  display: grid;
  place-items: center;
  min-height: 100vh;
}

.auth-card {
  width: 100%;
  max-width: 380px;
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.auth-card h1 {
  margin-top: 0;
}

.error-box {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fecaca;
  border-radius: 6px;
  padding: 8px;
  margin-bottom: 10px;
}

@media (max-width: 900px) {
  .panels,
  .charts {
    grid-template-columns: 1fr;
  }
}