:root {
  --aero-fg: #25313c;
  --aero-divider: rgba(255, 255, 255, 0.34);
  --aero-shadow: rgba(0, 22, 40, 0.2);
  --aero-glass-bg: rgba(255, 255, 255, 0.18);
  --aero-glass-bg-strong: rgba(255, 255, 255, 0.28);
  --aero-glass-blur: 12px;
}

.aero-ui-shell {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  color: var(--aero-fg);
  font-family: "Segoe UI", "Noto Sans", sans-serif;
}

.aero-ui-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}

.aero-sidebar,
.aero-main {
  background: var(--aero-glass-bg);
  -webkit-backdrop-filter: blur(var(--aero-glass-blur));
  backdrop-filter: blur(var(--aero-glass-blur));
}

.aero-sidebar {
  border-right: 1px solid var(--aero-divider);
  box-shadow: inset -1px 0 0 rgba(255, 255, 255, 0.2);
  padding: 16px;
}

.aero-main {
  padding: 16px;
}

.aero-card {
  background: var(--aero-glass-bg-strong);
  border: 1px solid var(--aero-divider);
  border-radius: 14px;
  -webkit-backdrop-filter: blur(var(--aero-glass-blur));
  backdrop-filter: blur(var(--aero-glass-blur));
  box-shadow: 0 10px 30px var(--aero-shadow);
  padding: 14px;
  margin-bottom: 12px;
}

.aero-title {
  margin: 0 0 10px;
  font-size: 18px;
}

.aero-subtle {
  opacity: 0.8;
  font-size: 14px;
}

@media (max-width: 900px) {
  .aero-ui-content {
    grid-template-columns: 1fr;
  }

  .aero-sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--aero-divider);
  }
}