manage-your-printer/static/css/caching-optimizations.css

/**
 * MYP Platform - CSS Caching-Optimierungen für Raspberry Pi
 * Performance-optimierte Styles ohne GPU-intensive Effekte
 */

/* ===== KRITISCHE ABOVE-THE-FOLD STYLES - RASPBERRY PI OPTIMIERT ===== */
/* Diese Styles sollten inline im HTML-Head geladen werden */
.critical-header {
  background: rgba(255, 255, 255, 0.98);
  position: sticky;
  top: 0;
  z-index: 1000;
  /* Entfernt: backdrop-filter, box-shadow */
}

.critical-nav {
  display: flex;
  align-items: center;
  padding: 1rem;
  max-width: 1200px;
  margin: 0 auto;
}

.critical-logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: #0073ce;
}

.critical-main {
  min-height: 100vh;
  background: #fafbfc;
  /* Entfernt: gradient für bessere Performance */
}

/* ===== LAZY LOADING PLACEHOLDER - VEREINFACHT ===== */
.lazy-placeholder {
  background: #f0f0f0;
  border-radius: 4px;
  /* Entfernt: gradient und animation */
}

.dark .lazy-placeholder {
  background: #374151;
  /* Entfernt: gradient und animation */
}

/* ===== PRELOAD HINTS ===== */
.preload-image {
  content-visibility: auto;
  contain-intrinsic-size: 300px 200px;
}

.preload-component {
  content-visibility: auto;
  contain-intrinsic-size: 100px;
}

/* ===== CACHE-OPTIMIERTE KOMPONENTEN - RASPBERRY PI OPTIMIERT ===== */
.cache-card {
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid rgba(229, 231, 235, 0.5);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1rem;
  contain: layout style;
  /* Entfernt: transition, hover-transform, paint containment */
}

.cache-button {
  background: #0073ce;
  color: white;
  border: none;
  border-radius: 6px;
  padding: 0.5rem 1rem;
  font-weight: 600;
  contain: layout style;
  /* Entfernt: transition */
}

.cache-button:hover {
  background: #005a9f;
}

.cache-input {
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid rgba(229, 231, 235, 0.8);
  border-radius: 4px;
  padding: 0.5rem;
  contain: layout style;
  /* Entfernt: transition, box-shadow */
}

.cache-input:focus {
  outline: none;
  border-color: #0073ce;
  /* Entfernt: box-shadow */
}

/* ===== LAYOUT SHIFT PREVENTION ===== */
.prevent-cls {
  min-height: 200px;
  contain: layout;
}

.image-container {
  aspect-ratio: 16/9;
  overflow: hidden;
  border-radius: 8px;
  background: #f3f4f6;
}

.image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* Entfernt: transition */
}

.image-container img[loading="lazy"] {
  opacity: 0;
}

.image-container img[loading="lazy"].loaded {
  opacity: 1;
}

/* ===== OPTIMIERTE TYPOGRAPHY ===== */
.text-heading {
  font-weight: 700;
  line-height: 1.2;
  color: #111827;
  contain: layout style;
}

.text-body {
  line-height: 1.6;
  color: #374151;
  contain: layout style;
}

.text-muted {
  color: #6b7280;
  contain: layout style;
}

/* ===== DARK MODE CACHE OPTIMIZATIONS - VEREINFACHT ===== */
.dark .cache-card {
  background: rgba(30, 41, 59, 0.98);
  border-color: rgba(100, 116, 139, 0.3);
}

.dark .cache-input {
  background: rgba(30, 41, 59, 0.98);
  border-color: rgba(100, 116, 139, 0.5);
  color: #e2e8f0;
}

.dark .text-heading {
  color: #f8fafc;
}

.dark .text-body {
  color: #e2e8f0;
}

.dark .text-muted {
  color: #94a3b8;
}

.dark .image-container {
  background: #374151;
}

/* ===== RESPONSIVE OPTIMIZATIONS ===== */
@media (max-width: 768px) {
  .critical-nav {
    padding: 0.75rem;
  }
  
  .cache-card {
    padding: 0.75rem;
    margin-bottom: 0.75rem;
  }
  
  .cache-button {
    padding: 0.75rem 1.25rem;
    font-size: 0.875rem;
  }
}

/* ===== PRINT OPTIMIZATIONS ===== */
@media print {
  .critical-header,
  .cache-button {
    display: none;
  }
  
  .cache-card {
    border: 1px solid #000;
    break-inside: avoid;
  }
}

/* ===== ALLE GPU ACCELERATION ENTFERNT ===== */
/* GPU-Beschleunigung ist auf Raspberry Pi problematisch */

/* ===== NUR FADE-IN OHNE TRANSFORM ===== */
.fade-in-optimized {
  opacity: 0;
  /* Entfernt: transform und alle transform-Animationen */
}

.fade-in-optimized.visible {
  opacity: 1;
  /* Nur opacity change */
}

/* ===== CONTAINER QUERIES SUPPORT ===== */
@container (min-width: 300px) {
  .cache-card {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1rem;
    align-items: center;
  }
}

/* ===== CONTENT VISIBILITY OPTIMIZATIONS ===== */
.auto-height {
  content-visibility: auto;
  contain-intrinsic-size: 0 200px;
}

.hidden-content {
  content-visibility: hidden;
}

/* ===== REDUCED MOTION PREFERENCES - ERWEITERT ===== */
@media (prefers-reduced-motion: reduce) {
  .fade-in-optimized,
  .cache-card,
  .cache-button,
  .cache-input {
    transition: none !important;
    transform: none !important;
    animation: none !important;
  }
  
  .lazy-placeholder {
    animation: none !important;
    background: #f0f0f0 !important;
  }
}

/* ===== HIGH CONTRAST MODE ===== */
@media (prefers-contrast: high) {
  .cache-card {
    border-width: 2px;
    border-color: #000;
  }
  
  .cache-button {
    border: 2px solid #000;
  }
  
  .cache-input {
    border-width: 2px;
    border-color: #000;
  }
}

/* ===== RASPBERRY PI SPECIFIC OPTIMIERUNGEN ===== */
.raspberry-pi-optimized {
  /* Minimale CSS Properties */
  /* Keine will-change */
  /* Keine Transforms */
  /* Keine Shadows */
  /* Nur opacity und color Transitions */
  transition: opacity 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.performance-critical {
  /* Für kritische Bereiche */
  contain: layout style;
  /* Keine paint containment */
}