body, main, aside, header, nav, .card, .sidebar, .offcanvas {
  transition: background-color 0.4s ease-in-out, color 0.4s ease-in-out !important;
}

/* --- Global Reset & Variables --- */

:root {
  --app-gap: 24px;
  --app-radius: 20px;
  --sidebar-width: 280px;
  --topbar-height: 80px;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: #111827;
  background: url('../../assets/img/Space1.jpg') no-repeat center center fixed;
  background-size: cover;
  overflow: hidden;
}

/* --- Video Background & Overlay --- */

.bg-video {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.bg-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(17,24,39,0.9) 0%, rgba(17,24,39,0.5) 50%, rgba(17,24,39,0.8) 100%);
  z-index: -1;
  pointer-events: none;
}

/* --- Frosted Glass Reusable Class --- */

.glass-panel {
  background-color: rgba(31, 41, 55, 0.65);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* ==========================================================================
   THE FLOATING ISLAND LAYOUT MATH
   ========================================================================== */

/* 1. The Sidebar Island */

.island-sidebar {
  position: fixed;
  top: var(--app-gap);
  bottom: var(--app-gap);
  left: var(--app-gap);
  width: var(--sidebar-width);
  border-radius: var(--app-radius);
  overflow-y: auto;
  z-index: 100;
}

/* 2. The Top Bar Island */

.island-topbar {
  position: fixed;
  top: var(--app-gap);
  left: calc(var(--sidebar-width) + var(--app-gap) + var(--app-gap));
  right: var(--app-gap);
  height: var(--topbar-height);
  border-radius: var(--app-radius);
  z-index: 100;
}

/* 3. The Main Content Island */

.island-content {
  position: absolute;
  top: calc(var(--topbar-height) + var(--app-gap) + var(--app-gap));
  bottom: var(--app-gap);
  left: calc(var(--sidebar-width) + var(--app-gap) + var(--app-gap));
  right: var(--app-gap);
  border-radius: var(--app-radius);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: #4b5563 transparent;
  z-index: 10;
}

/* ==========================================================================
   MOBILE OVERRIDES (Fixed alignment and centering)
   ========================================================================== */

@media (max-width: 768px) {
  body {
    overflow-y: auto;
    overflow-x: hidden;
  }
}

@media (max-width: 768px) {
  .island-sidebar {
    display: none !important;
  }
}

@media (max-width: 768px) {
  .island-topbar {
    position: relative;
    top: 0;
    left: 0;
    right: 0;
    margin: var(--app-gap) auto;
    width: calc(100% - (var(--app-gap) * 2));
    height: auto;
    min-height: var(--topbar-height);
    padding: 15px 0;
  }
}

@media (max-width: 768px) {
  .island-content {
    position: relative;
    top: 0;
    left: 0;
    right: 0;
    margin: 0 auto var(--app-gap) auto;
    width: calc(100% - (var(--app-gap) * 2));
    overflow-y: visible;
  }
}

/* --- Navigation Link Styling --- */

.top-link {
  color: #cbd5e1;
  text-decoration: none;
  font-weight: 600;
  padding: 0.5rem;
  transition: 0.3s;
  border-bottom: 2px solid transparent;
  text-shadow: 0 2px 4px rgba(0,0,0,0.8);
}

.top-link:hover, .top-link.active {
  color: #fff;
  border-bottom-color: #60a5fa;
}

.side-link {
  color: #cbd5e1;
  text-decoration: none;
  font-weight: 600;
  transition: 0.3s;
  border-left: 3px solid transparent;
  text-shadow: 0 2px 4px rgba(0,0,0,0.8);
}

.side-link:hover {
  background: rgba(255,255,255,0.05);
  color: #fff;
  border-left-color: #60a5fa;
}

.side-link.active {
  background: rgba(255,255,255,0.1);
  color: #fff;
  border-left-color: #60a5fa;
}

/* --- Utilities & Aesthetics --- */

.tracking-widest {
  letter-spacing: 0.15em;
}

.text-shadow {
  text-shadow: 0 2px 4px rgba(0,0,0,0.8);
}

.text-shadow-strong {
  text-shadow: 0 4px 12px rgba(0,0,0,0.9);
}

.custom-tag {
  box-shadow: 0 4px 6px rgba(0,0,0,0.4);
  transition: transform 0.2s;
}

.custom-tag:hover {
  transform: scale(1.05);
}

.hover-invert:hover {
  background-color: #fff !important;
  color: #000 !important;
}

/* Scroll Animation Classes */

.transition-fade {
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.translate-y-50 {
  transform: translateY(30px);
}

.translate-middle-y-0 {
  transform: translateY(0);
}

/* --- Your Custom Skyline Animations --- */

.skyline-wrapper {
  pointer-events: none;
}

.building {
  background-color: #1f2937;
  border-radius: 0.5rem 0.5rem 0 0;
  position: relative;
}

.building-roof {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1rem;
  background-color: rgba(75, 85, 99, 0.8);
  border-radius: 0.5rem 0.5rem 0 0;
}

.building-alt {
  background-color: #374151;
}

.b-sm {
  width: 4rem;
  height: 10rem;
}

.b-md {
  width: 5rem;
  height: 14rem;
}

.b-lg {
  width: 6rem;
  height: 20rem;
}

.b-xl {
  width: 6rem;
  height: 24rem;
}

.window-light {
  position: absolute;
  width: 1rem;
  height: 1rem;
  background-color: #fde047;
  border-radius: 2px;
  box-shadow: 0 0 15px 2px #fde047;
}

.w-1 {
  top: 2rem;
  left: 50%;
  transform: translateX(-50%);
}

.w-2 {
  top: 6rem;
  left: 1rem;
}

@keyframes swing {
  0% {
    transform: rotate(-2deg);
  }
  100% {
    transform: rotate(2deg);
  }
}

.crane-base {
  position: absolute;
  top: -6rem;
  left: 50%;
  transform: translateX(-50%);
  width: 1rem;
  height: 6rem;
  background-color: #4b5563;
}

.crane-arm {
  position: absolute;
  top: 0;
  left: -8rem;
  width: 16rem;
  height: 0.5rem;
  background-color: #4b5563;
  transform-origin: right center;
  animation: swing 2s ease-in-out infinite alternate;
}

.crane-line {
  position: absolute;
  top: 100%;
  left: 2rem;
  width: 2px;
  height: 6rem;
  background-color: #6b7280;
}

.crane-hook {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  width: 1rem;
  height: 1rem;
  background-color: #374151;
}

/* Hide the top nav scrollbar by default */

#mobileMenu > div {
  scrollbar-color: transparent transparent;
}

/* Reveal the scrollbar when hovering */

#mobileMenu > div:hover {
  scrollbar-color: #4b5563 transparent;
}

/* --- Space Theme Overrides --- */

/* Darken the frosted glass for space mode so it matches the vibe */

body.space-theme .glass-panel {
  background-color: rgba(15, 20, 30, 0.85) !important;
  border: 1px solid rgba(255, 255, 255, 0.04) !important;
}

/* Smooth color transition */

.tool-blender, .tool-ansys, .tool-onshape, .tool-unity, .tool-vs, .tool-inkscape, .tool-gimp, .tool-link {
  transition: background-color 0.25s ease, color 0.25s ease !important;
}

/* Hover Brand Colors */

.tool-blender:hover {
  background-color: #FF9800 !important;
  color: #ffffff !important;
}

.tool-ansys:hover {
  background-color: #E02424 !important;
  color: #ffffff !important;
}

.tool-onshape:hover {
  background-color: #1B5FAA !important;
  color: #ffffff !important;
}

.tool-unity:hover {
  background-color: #222222 !important;
  color: #ffffff !important;
}

.tool-vs:hover {
  background-color: #5C2D91 !important;
  color: #ffffff !important;
}

.tool-inkscape:hover {
  background-color: #4E9A06 !important;
  color: #ffffff !important;
}

.tool-gimp:hover {
  background-color: #5A4A42 !important;
  color: #ffffff !important;
}

.tool-link:hover {
  background-color: #00bcd4 !important;
  color: #ffffff !important;
}

main {
  scroll-behavior: smooth;
}

.bg-overlay {
  transition: opacity 0.4s ease-in-out !important;
}

body.space-theme .bg-overlay {
  opacity: 0 !important;
}

/* 1. Turn lights off during the day */

.window-light {
  background-color: #111827 !important;
  box-shadow: none !important;
  transition: background-color 0.4s ease-in-out, box-shadow 0.4s ease-in-out !important;
}

/* 2. Turn lights on at night */

body.space-theme .window-light {
  background-color: #fde047 !important;
  box-shadow: 0 0 15px 2px #fde047 !important;
}

/* Default (Day Mode): Show Sun, Hide Moon */

.icon-moon {
  display: none !important;
}

.icon-sun {
  display: inline-block !important;
}

/* Space Theme (Night Mode): Show Moon, Hide Sun */

body.space-theme .icon-moon {
  display: inline-block !important;
}

body.space-theme .icon-sun {
  display: none !important;
}

.btn-download {
  transition: transform 0.2s ease, box-shadow 0.2s ease !important;
}

.btn-download:hover {
  transform: translateY(-3px) !important;
  box-shadow: 0 4px 15px rgba(0, 188, 212, 0.4) !important;
}