*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 14px;
  color: #1a1a2e;
  background: #f5f7fa;
  line-height: 1.5;
}

.page-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px 48px;
}

.page-header {
  padding: 24px 0 20px;
  border-bottom: 2px solid #e2e8f0;
  margin-bottom: 24px;
}

.page-header h1 {
  font-size: 22px;
  font-weight: 700;
  color: #1a1a2e;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s, opacity 0.15s;
}

.btn--secondary {
  background: #fff;
  border-color: #cbd5e0;
  color: #4a5568;
}

.btn--secondary:hover:not(:disabled) {
  background: #edf2f7;
}

.btn--export {
  background: #276749;
  border-color: #276749;
  color: #fff;
}

.btn--export:hover:not(:disabled) {
  background: #22543d;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.alert {
  padding: 12px 16px;
  border-radius: 6px;
  margin-bottom: 16px;
  font-size: 13px;
}

.alert--error {
  background: #fff5f5;
  border: 1px solid #fc8181;
  color: #c53030;
}