/* Theme Image Mapping */
:root,
[data-theme="default"] {
  --bg-image: url('background/Default.jfif');
}

[data-theme="sunset"] {
  --bg-image: url('background/Sunset.jfif');
}

[data-theme="aurora"] {
  --bg-image: url('background/Aurora.jfif');
}

[data-theme="nebula"] {
  --bg-image: url('background/Nebula.jfif');
}

[data-theme="carbon"] {
  --bg-image: url('background/Carbon.jfif');
}

[data-theme="emerald"] {
  --bg-image: url('background/Emb.jfif');
}

.bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  /* Deepest layer */
  background-image: var(--bg-image);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transition: background-image 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Blur & Tone */
.bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  /* Slightly darkened for better contrast without blur */
  z-index: -1;
}

[data-mode="light"] .bg::before {
  background: rgba(255, 255, 255, 0.4);
}

/* Sync with Light/Dark Mode */
[data-mode="dark"] .bg {
  filter: brightness(0.6) saturate(1.1);
}

[data-mode="light"] .bg {
  filter: brightness(1.1) saturate(0.9);
}

/* The "Subtle Blue" Tint only for Default theme to keep other themes consistent */
[data-mode="dark"][data-theme="default"] .bg {
  filter: brightness(0.6) saturate(1.2);
}

[data-mode="light"][data-theme="default"] .bg {
  filter: brightness(1.1) saturate(1.1);
}

/* Ensuring Sidebar & Header don't get lost in the background */
.sidebar,
.topbar {
  backdrop-filter: blur(40px) saturate(1.2) brightness(1.1) !important;
  -webkit-backdrop-filter: blur(40px) saturate(1.2) brightness(1.1) !important;
  z-index: 20;
}