/**
 * Smooth Scroll CSS-Komponente
 * ---------------------------
 * Diese Datei enthält Stile für erweiterte Scroll-Funktionalitäten und -Effekte.
 *
 * Eigenschaften:
 * - Sanftes Scrollen (smooth-scroll) für eine verbesserte Benutzererfahrung
 * - Scroll-Snap für präzises Positionieren von Elementen beim Scrollen
 * - Fortschrittsanzeigen für die Visualisierung der Scroll-Position
 * - Parallax-Effekte für tiefenwirksame Layouts
 * - Scroll-Animation-Effekte (fade, scale, slide, rotate)
 * - Gestaffelte Scroll-Animationen für Gruppen von Elementen
 * - Scroll-zu-Top-Funktionalität
 * - Scroll-Spy für Navigation
 * - Barrierefreiheitsanpassungen für reduzierte Bewegung
 *
 * Verwendung:
 * Fügen Sie die entsprechenden Klassen zu Ihren HTML-Elementen hinzu,
 * um die verschiedenen Scroll-Effekte und -Funktionen zu aktivieren.
 *
 * @layer core - Grundlegende Scroll-Funktionalitäten und -Effekte
 * @layer components - Wiederverwendbare Scroll-Komponenten
 */

/* Animationen */
@keyframes scroll-timeline-fade {
    0% {
        opacity: 0;
        transform: translateY(var(--spacing-5, 1.25rem));
    }

    100% {
        opacity: 1;
        transform: translateX(0);
    }
}

@layer smooth-scroll {
  /* Smooth Scroll Variables */
  :root {
    --scroll-behavior: smooth;
    --scroll-padding-top: 0;
    --scroll-snap-type: none;
    --scroll-snap-align: none;
    --scroll-snap-stop: always;
    --scroll-margin: 0;
    --scroll-timeline-name: none;
    --scroll-timeline-axis: block;
    --scroll-timeline-view-offset: 0;
  }

  /* Base Smooth Scroll */
  html {
    scroll-behavior: var(--scroll-behavior, smooth);
    scroll-padding-top: var(--scroll-padding-top, 0);
  }

  /* Scroll Snap */
  .scroll-snap-container {
    height: 100vh;
    overflow-y: auto;
    scroll-snap-type: var(--scroll-snap-type, none);
  }

  .scroll-snap-item {
    scroll-margin: var(--scroll-margin, 0);
    scroll-snap-align: var(--scroll-snap-align, none);
    scroll-snap-stop: var(--scroll-snap-stop, normal);
  }

  /* Scroll Progress */
  .scroll-progress {
    background: linear-gradient(to right, var(--color-primary, #3b82f6) var(--scroll), transparent 0);
    height: var(--spacing-1, 0.25rem);
    left: 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: var(--z-50);
  }

  /* Scroll Timeline */
  .scroll-timeline {
    scroll-timeline-axis: var(--scroll-timeline-axis);
    scroll-timeline-name: var(--scroll-timeline-name);
    scroll-timeline-view-offset: var(--scroll-timeline-view-offset);
  }

  /* Parallax Scrolling */
  .parallax-container {
    height: 100vh;
    overflow: hidden auto;
    perspective: var(--border-width);
  }

  .parallax-layer {
    inset: 0;
    position: absolute;
  }

  .parallax-layer-back {
    transform: translateZ(calc(-1 * var(--border-width))) scale(2);
  }

  .parallax-layer-base {
    transform: translateZ(0);
  }

  .parallax-layer-front {
    transform: translateZ(var(--border-width)) scale(0.5);
  }

  /* Scroll Reveal */
  .scroll-reveal {
    opacity: 0;
    transform: translateY(var(--spacing-5, 1.25rem));
    transition: all var(--transition-normal, 200ms ease);
  }

  .scroll-reveal.visible {
    opacity: 1;
    transform: translateX(0);
  }

  /* Scroll Fade */
  .scroll-fade {
    opacity: 0;
    transition: opacity var(--transition-normal, 200ms ease);
  }

  .scroll-fade.visible {
    opacity: 1;
  }

  /* Scroll Scale */
  .scroll-scale {
    opacity: 0;
    transform: scale(0.95);
    transition: all var(--transition-normal, 200ms ease);
  }

  .scroll-scale.visible {
    opacity: 1;
    transform: scale(1);
  }

  /* Scroll Slide - Konsolidierte Version */
  .scroll-slide {
    opacity: 0;
    transition: all var(--transition-normal, 200ms ease);
  }

  .scroll-slide.visible {
    opacity: 1;
    transform: translate(0, 0);
  }

  /* Scroll Slide Richtungs-Varianten */
  .scroll-slide-left { transform: translateX(-50px); }

  .scroll-slide-right { transform: translateX(50px); }

  .scroll-slide-up { transform: translateY(50px); }

  .scroll-slide-down { transform: translateY(-50px); }

  /* Scroll Rotate */
  .scroll-rotate {
    opacity: 0;
    transform: rotate(-15deg);
    transition: all var(--transition-normal, 200ms ease);
  }

  .scroll-rotate.visible {
    opacity: 1;
    transform: rotate(0);
  }

  /* Scroll Stagger */
  .scroll-stagger > * {
    opacity: 0;
    transform: translateY(var(--spacing-5, 1.25rem));
    transition: all var(--transition-normal, 200ms ease);
  }

  /* Stagger Delays - Kompakte Version */
  .scroll-stagger > *:nth-child(1) { transition-delay: 0.1s; }

  .scroll-stagger > *:nth-child(2) { transition-delay: 0.2s; }

  .scroll-stagger > *:nth-child(3) { transition-delay: 0.3s; }

  .scroll-stagger > *:nth-child(4) { transition-delay: 0.4s; }

  .scroll-stagger > *:nth-child(5) { transition-delay: 0.5s; }

  .scroll-stagger.visible > * {
    opacity: 1;
    transform: translateX(0);
  }

  /* Scroll Progress Bar */
  .scroll-progress-bar {
    background: var(--slider-track-color);
    height: var(--spacing-1, 0.25rem);
    left: 0;
    position: fixed;
    top: 0;
    width: 100%;
  }

  .scroll-progress-bar::before {
    background: var(--color-primary, #3b82f6);
    content: '';
    height: 100vh;
    left: 0;
    position: absolute;
    top: 0;
    transition: width var(--transition-normal, 200ms ease);
    width: var(--scroll);
  }

  /* Scroll to Top Button */
  .scroll-to-top {
    align-items: center;
    background: var(--color-primary, #3b82f6);
    border-radius: 5px;
    bottom: var(--spacing-5, 1.25rem);
    color: var(--color-white, #fff);
    cursor: pointer;
    display: flex;
    height: var(--spacing-10, 2.5rem);
    justify-content: center;
    opacity: 0;
    position: fixed;
    right: var(--spacing-5, 1.25rem);
    transform: translateY(var(--spacing-5, 1.25rem));
    transition: all var(--transition-normal, 200ms ease);
    width: var(--spacing-10, 2.5rem);
    z-index: var(--z-50);
  }

  .scroll-to-top.visible {
    opacity: 1;
    transform: translateX(0);
  }

  .scroll-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(calc(-1 * var(--border-width-thick)));
  }

  /* Scroll Spy Navigation */
  .scroll-spy-nav {
    position: fixed;
    right: var(--spacing-5, 1.25rem);
    top: 50;
    transform: translateX(-50);
  }

  .scroll-spy-nav a {
    background: var(--slider-track-color);
    border-radius: 5px;
    display: block;
    height: var(--space-small-10px);
    margin: var(--space-small-10px) 0;
    transition: all var(--transition-normal, 200ms ease);
    width: var(--space-small-10px);
  }

  .scroll-spy-nav a.active {
    background: var(--color-primary, #3b82f6);
    transform: scale(1.2);
  }

  /* Scroll Timeline Animation */
  .scroll-timeline-animation {
    animation: scroll-timeline-fade 1s ease-out forwards;
    animation-range: entry 10 cover 30;
    animation-timeline: view();
  }

  /* Scroll Performance */
  .scroll-performance {
    backface-visibility: hidden;
    transform: translateZ(0);
    will-change: transform, opacity;
  }

  /* Respektiere Nutzereinstellung für reduzierte Bewegung */
  @media (prefers-reduced-motion: reduce) {
    /* Deaktiviere alle Scroll-Animationen */
    html,
    body,
    .scroll-smooth,
    .scroll-behavior-smooth,
    .scroll-mt,
    .scroll-mb,
    .scroll-ms,
    .scroll-me,
    .scroll-pt,
    .scroll-pb,
    .scroll-ps,
    .scroll-pe,
    [data-scroll-trigger],
    .scroll-snap-container,
    .scroll-snap-item {
      animation: none !important;
      scroll-behavior: auto !important;
      scroll-padding: 0 !important;
      scroll-snap-type: none !important;
      transition: none !important;
    }
  }

  /* Responsive Anpassungen */
  @media (max-width: 640px) {
    .touch-feedback::after {
        block-size: 150;
        inline-size: 150;
    }
    
    .focus-ring:focus-visible {
        box-shadow: 0 0 0 var(--border-width) var(--color-primary, #3b82f6);
    }
  }

  @media (min-width: 640px) {
    /* Fade Stagger Delays - Kompakte Version */
    .scroll-fade-staggered > *:nth-child(2) { animation-delay: 0.1s; }

    .scroll-fade-staggered > *:nth-child(3) { animation-delay: 0.2s; }

    .scroll-fade-staggered > *:nth-child(4) { animation-delay: 0.3s; }
  }

  @media (min-width: 768px) {
    .scroll-to-top {
      bottom: var(--spacing-8);
      right: var(--spacing-8);
    }
  }

  @media (min-width: 1024px) {
    .scroll-parallax {
      transform: translateY(calc(var(--scroll-offset) * 0.15));
    }
  }

  /* Reduzierte Bewegung für Barrierefreiheit */
  @media (prefers-reduced-motion: reduce) {
    :root {
      --scroll-behavior: auto;
    }
    
    .scroll-fade,
    .scroll-scale,
    .scroll-slide,
    .scroll-rotate,
    .scroll-parallax,
    .scroll-fade-staggered > * {
      animation: none;
      opacity: 1;
      transform: none;
      transition: none;
    }
  }
}