/* Critical Path CSS - Only what's needed for initial render */
:root {
  --primary-hue: 240;
  --primary-saturation: 75%;
  --primary-lightness: 60%;
  --primary-color: hsl(var(--primary-hue), var(--primary-saturation), var(--primary-lightness));
  --primary-rgb: 79, 70, 229;
  
  --text-color: hsl(222, 47%, 11%);
  --bg-color: hsl(210, 20%, 98%);
  --card-bg: hsl(0, 0%, 100%);
  
  --navbar-height: 60px;
  --sidebar-width: 380px;
  --sidebar-width-tablet: 275px;
  
  --shadow-sm: 0 2px 4px hsla(210, 20%, 15%, 0.07);
  --shadow-md: 0 4px 8px hsla(212, 13%, 25%, 0.07), 0 2px 4px hsla(210, 20%, 15%, 0.05);
  
  --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  --font-family-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
   
  --z-navbar: 900;
  --z-maximum: 9999;
  
  --space-md: 1rem;
  --space-lg: 1.5rem;

  --speed-normal: 300ms;
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
  
  --border-color: hsl(216, 12%, 84%);
}

[data-theme="dark"] {
  --text-color: hsl(220, 20%, 96%);
  --bg-color: hsl(222, 47%, 11%);
  --card-bg: hsl(222, 47%, 15%);
  --border-color: hsl(225, 25%, 25%);
}

/* Base Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-system);
  font-size: 16px;
  line-height: 1.6;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s ease, color 0.3s ease;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-wrap: break-word;
  -webkit-tap-highlight-color: transparent;
}

.fonts-loaded body {
  font-family: var(--font-family);
}

/* Prevent FOUC */
.preload * {
  transition: none !important;
}

/* Initial Layout Structure */
.layout-with-sidebar {
  display: flex;
  min-height: 100vh;
  width: 100%;
  position: relative;
}

.static-sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  width: var(--sidebar-width);
  flex-shrink: 0;
  z-index: 50;
  background-color: var(--card-bg);
  border-right: 1px solid var(--border-color);
  transition: transform 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.content-with-sidebar {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  max-width: calc(100% - var(--sidebar-width));
}

.static-navbar {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: var(--z-navbar);
  height: var(--navbar-height);
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

/* Loading Indicator (Compact Critical Version) */
.adaptive-loading-indicator {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-maximum);
  background-color: rgba(249, 250, 251, 0.7);
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

[data-theme="dark"] .adaptive-loading-indicator {
  background-color: rgba(17, 24, 39, 0.7);
}

.is-loading .adaptive-loading-indicator,
body[data-loading="true"] .adaptive-loading-indicator {
  opacity: 1;
  visibility: visible;
  pointer-events: all;
}

.critical-spinner {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 3px solid rgba(229, 231, 235, 0.3);
  border-top-color: var(--primary-color);
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* NoScript Warning */
.noscript-warning {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: #ef4444;
  color: white;
  padding: 15px;
  text-align: center;
  font-weight: bold;
  z-index: 9999;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

/* Transitions for dynamic content */
.dynamic-content {
  opacity: 1;
  transition: opacity var(--speed-normal) var(--ease-standard);
}

.dynamic-content.fade-in {
  animation: fadeIn var(--speed-normal) var(--ease-standard);
}

.dynamic-content.fade-out {
  opacity: 0;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Visually Hidden Elements for Screen Readers */
.sr-announcer {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .static-sidebar {
    width: var(--sidebar-width-tablet);
  }
  
  .content-with-sidebar {
    max-width: calc(100% - var(--sidebar-width-tablet));
  }
}

@media (max-width: 768px) {
  .layout-with-sidebar {
    flex-direction: column;
  }
  
  .static-sidebar {
    position: relative;
    width: 100%;
    height: auto;
    max-height: none;
    overflow: visible;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  
  .content-with-sidebar {
    max-width: 100%;
  }
}

/* Safe Area Insets for Notched Devices */
@supports (padding: max(0px)) {
  .adaptive-loading-indicator {
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
  }
}