/* Hide all scrollbars globally */
* {
  scrollbar-width: none !important; /* Firefox */
  -ms-overflow-style: none !important; /* IE and Edge */
}
*::-webkit-scrollbar {
  display: none !important; /* Chrome, Safari, Opera */
}

html, body {
  min-height: 100%;
}

body {
  background-color: var(--bg);
  background-image: 
    linear-gradient(rgba(2, 132, 199, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(2, 132, 199, 0.03) 1px, transparent 1px);
  background-size: 30px 30px;
  background-position: center;
  color: var(--text);
  font-family: var(--font-sans);
  transition: background-color var(--transition-normal), color var(--transition-normal), background-image var(--transition-normal);
  display: flex;
  flex-direction: column;
}

[data-theme="dark"] body {
  background-image: 
    linear-gradient(rgba(168, 85, 247, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 85, 247, 0.05) 1px, transparent 1px);
}

/* 3-Column Page Skeleton */
.app-container {
  display: grid;
  grid-template-columns: 1fr;
  min-height: 100vh;
  width: 100%;
  position: relative;
}

.ad-gutter {
  display: none;
  padding: 1.5rem;
  height: calc(100vh - 116px);
  position: sticky;
  top: 116px;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
}

#ad-left {
  grid-column: 1;
}

#ad-right {
  grid-column: 3;
}

.ad-placeholder {
  width: 100%;
  max-width: 300px;
  min-width: 160px;
  height: 600px;
  border-radius: var(--border-radius-md);
  border: 2px dashed var(--glass-border);
  background: var(--glass-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.3;
}

.main-content {
  grid-column: 1;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem;
  box-sizing: border-box;
  padding-top: 116px; /* Offset for fixed navbar at top: 28px */
}

@media (min-width: 1200px) {
  .app-container {
    grid-template-columns: minmax(200px, 1fr) minmax(0, 960px) minmax(200px, 1fr);
  }
  
  .ad-gutter {
    display: flex;
  }
  
  .main-content {
    grid-column: 2;
  }
}

/* Absolute Top Elements: Logo & Theme Toggle */
.logo-container-top {
  position: fixed;
  top: 10px; /* Aligns the vertical center of the 85px logo container with the 48px navbar/toggle at top: 28px */
  left: 24px; /* Spaced out horizontally to match the theme toggle's 24px right spacing */
  z-index: 1000;
}

.theme-toggle-container-top {
  position: fixed;
  top: 28px; /* Shifted down from 16px */
  right: 24px;
  z-index: 1000;
}

.nav-logo-link-top {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 220px;
  height: 85px;
  background: transparent;
  border: none;
  box-shadow: none;
  overflow: hidden;
  transition: transform var(--transition-fast), filter var(--transition-fast);
  padding: 0;
}

.nav-logo-link-top:hover {
  transform: scale(1.06);
  filter: brightness(1.15);
}

.nav-logo-top {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform var(--transition-normal); /* Add smooth transition for theme scale toggling */
}

[data-theme="dark"] .nav-logo-top {
  transform: scale(1.22); /* Make dark mode logo match visual size of light mode */
  transform-origin: center;
}

/* Floating Navigation Bar - "Frosted Glass Pill" */
.navbar {
  position: fixed;
  top: 28px; /* Shifted down from 16px */
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.8rem;
  border-radius: var(--border-radius-pill);
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  z-index: 1000;
  transition: background var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

/* Nav Menu Items */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow-x: auto;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none;  /* IE and Edge */
}

.nav-menu::-webkit-scrollbar {
  display: none; /* Chrome, Safari, Opera */
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-pill);
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.nav-item svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.nav-item:hover {
  color: var(--text);
  background: rgba(129, 140, 248, 0.08);
}

.nav-item.active {
  color: var(--accent-contrast);
  background: var(--accent);
}

/* Theme Toggle Button */
.theme-toggle-container-top .theme-toggle {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  color: var(--text-muted);
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.theme-toggle-container-top .theme-toggle:hover {
  color: var(--text);
  background: var(--surface);
  border-color: var(--accent);
  box-shadow: 0 0 16px var(--accent-glow);
  transform: scale(1.08) rotate(15deg);
}

.theme-toggle-container-top .theme-toggle svg {
  width: 20px;
  height: 20px;
}

.theme-toggle-container-top .theme-toggle img {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

/* Active Theme Display Switch */
.theme-toggle-container-top .theme-toggle .sun-icon {
  display: none;
}

[data-theme="dark"] .theme-toggle-container-top .theme-toggle .sun-icon {
  display: block;
}

[data-theme="dark"] .theme-toggle-container-top .theme-toggle .moon-icon {
  display: none;
}

/* Mobile Adaptation (<640px) */
@media (max-width: 640px) {
  .logo-container-top {
    left: 12px;
    top: 12px;
  }
  
  .theme-toggle-container-top {
    right: 12px;
    top: 12px;
  }

  .nav-logo-link-top {
    width: 150px;
    height: 58px;
    padding: 0;
    border: none;
    background: transparent;
    box-shadow: none;
  }

  .theme-toggle-container-top .theme-toggle {
    width: 38px;
    height: 38px;
    border-radius: var(--border-radius-sm);
  }

  .navbar {
    top: 12px;
    padding: 0.4rem 0.6rem;
    gap: 0.5rem;
  }
  
  .nav-menu {
    gap: 0.25rem;
  }
  
  .nav-item {
    padding: 0.4rem 0.6rem;
    font-size: 0.8rem;
  }
  
  .nav-item span {
    display: none; /* Icons only on very small devices */
  }

  .main-content {
    padding-top: 80px; /* Adjust top padding for smaller mobile header space */
  }
}

/* Footer styling */
.app-footer {
  margin-top: auto;
  padding: 2rem 1rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--glass-border);
  background: var(--surface);
}