.app-shell {
  box-sizing: border-box;
}

.dc-card {
  box-sizing: border-box;
}

.split-row > * {
  flex: 1 1 320px;
}

.predict-layout > * {
  flex: 1 1 320px;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  border: 1px solid #30363d;
  border-radius: 16px;
  padding: 16px 20px;
  margin-bottom: 20px;
  background:
    radial-gradient(circle at 12% 12%, rgba(139, 92, 246, 0.18), transparent 45%),
    radial-gradient(circle at 88% 0%, rgba(236, 72, 153, 0.16), transparent 40%),
    linear-gradient(135deg, rgba(22, 27, 34, 0.96), rgba(13, 17, 23, 0.94));
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.26);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 240px;
  flex: 1;
}

.logo {
  color: #fff;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.2rem;
  display: inline-flex;
  align-items: center;
  gap: 0.1rem;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(4px);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.logo:hover {
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(59, 130, 246, 0.25);
  border-color: rgba(139, 92, 246, 0.55);
}

.logo-main {
  letter-spacing: 0.2px;
}

.logo-accent {
  background: linear-gradient(90deg, #ec4899, #8b5cf6 52%, #3b82f6);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.header-copy {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.header-title {
  color: #e6edf3;
  margin: 0;
  font-size: 17px;
  font-weight: 700;
}

.header-subtitle {
  color: #8b949e;
  margin: 0;
  font-size: 12px;
}

.header-metrics {
  display: flex;
  align-items: center;
  gap: 10px;
}

.metric-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.04);
}

.metric-icon {
  font-size: 15px;
}

.metric-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.metric-label {
  color: #8b949e;
  font-size: 10px;
  letter-spacing: 0.6px;
  text-transform: uppercase;
}

.metric-value {
  font-size: 13px;
  font-weight: 700;
}

.metric-value.mae {
  color: #f59e0b;
}

.metric-value.r2 {
  color: #22c55e;
}

@media (max-width: 992px) {
  .app-shell {
    padding: 14px 16px !important;
  }

  .app-header {
    flex-wrap: wrap;
    gap: 12px;
    align-items: flex-start !important;
    padding: 14px 16px;
  }

  .header-metrics {
    width: 100%;
    flex-wrap: wrap;
  }

  .cross-header {
    flex-wrap: wrap;
    gap: 10px;
  }
}

@media (max-width: 768px) {
  .app-shell {
    padding: 12px !important;
  }

  .dc-card {
    padding: 14px !important;
    border-radius: 10px !important;
  }

  .kpi-grid {
    gap: 10px !important;
  }

  .split-row > *,
  .predict-layout > * {
    min-width: 100% !important;
    flex-basis: 100% !important;
  }

  .header-brand {
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .metric-chip {
    flex: 1 1 180px;
  }
}