/* ================================================================
   NAV.CSS — carlwinkelsen Navigation Mechanic
   ----------------------------------------------------------------
   Abhängigkeit: style.css muss vorher geladen sein (CW-Tokens)
   Verwendet ausschließlich bestehende --cw-* Custom Properties.
   Nichts hier muss in style.css übernommen werden — diese Datei
   ist in sich geschlossen und projektspezifisch.
   ================================================================ */

:root {
  --cw-nav-logo-size: 55vh;  /* ← Einzige Stelle zum Anpassen der Logo-Größe */
  --cw-split-ratio: 0.4565;   /* C/W-Grenze: gemessen + viewBox-korrigiert      */
}

@layer cw-nav-mechanic {

  /* ── Body-Basis ──────────────────────────────────────────────── */
  html, body {
    width: 100%; height: 100%;
    overflow: hidden;
    background: var(--cw-bg);
    color: var(--cw-text);
  }


  /* ================================================================
     PAGES — alle Seiten stapeln sich absolut übereinander
  ================================================================ */

  .page {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: var(--cw-space-4);
  }


  /* ================================================================
     STARTSEITE — geteilter Hintergrund
  ================================================================ */

  #pageHome {
    z-index: 4;
    flex-direction: row;
    gap: 0;
    pointer-events: none;
  }

  .home-half {
    flex: 1;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--cw-space-3);
    cursor: pointer;
    pointer-events: auto;
    will-change: transform;
    transition:
      transform var(--cw-dur-page) var(--cw-ease-cinematic),
      filter     0.22s             var(--cw-ease-out);
  }

  #hGreen  { background: var(--cw-gray-100); }
  #hPurple { background: var(--cw-gray-800); }

  #hGreen.exit-left   { transform: translateX(-100%); pointer-events: none; }
  #hGreen.exit-right  { transform: translateX(200%);  pointer-events: none; }
  #hPurple.exit-left  { transform: translateX(-200%); pointer-events: none; }
  #hPurple.exit-right { transform: translateX(100%);  pointer-events: none; }

  .home-divider {
    position: absolute;
    left: 50%; top: 8%; bottom: 8%;
    width: 1px;
    background: var(--cw-border);
    transform: translateX(-50%);
    pointer-events: none;
    transition: opacity calc(var(--cw-dur-page) * 0.4) var(--cw-ease-cinematic);
  }
  .home-divider.hide { opacity: 0; }

  .home-label {
    font-family: var(--cw-font-display);
    font-size: var(--cw-text-3xl);
    font-weight: 700;
    letter-spacing: var(--cw-tracking-tight);
    line-height: var(--cw-leading-tight);
    text-transform: uppercase;
    user-select: none;
    pointer-events: none;
  }
  #hGreen  .home-label { color: var(--cw-gray-400); }
  #hPurple .home-label { color: var(--cw-gray-600); }

  .home-hint {
    font-family: var(--cw-font-body);
    font-size: var(--cw-text-2xs);
    letter-spacing: var(--cw-tracking-wider);
    text-transform: uppercase;
    user-select: none;
    pointer-events: none;
    animation: cw-nav-pulse 2.2s ease-in-out infinite;
  }
  #hGreen  .home-hint { color: var(--cw-text-faint); }
  #hPurple .home-hint { color: var(--cw-gray-600); }


  /* ================================================================
     UNTERSEITEN
  ================================================================ */

  #pageGreen {
    background: var(--cw-gray-50);
    z-index: 3;
    transform: translateX(-100%);
    transition: transform var(--cw-dur-page) var(--cw-ease-cinematic);
  }
  #pageGreen.enter { transform: translateX(0); }

  #pagePurple {
    background: var(--cw-gray-900);
    z-index: 3;
    transform: translateX(100%);
    transition: transform var(--cw-dur-page) var(--cw-ease-cinematic);
  }
  #pagePurple.enter { transform: translateX(0); }

  #pageRed {
    background: var(--cw-black);
    z-index: 2;
    clip-path: inset(0 50% 0 50%);
    transition: clip-path 0.65s var(--cw-ease-cinematic);
  }
  #pageRed.open { clip-path: inset(0 0% 0 0%); }


  /* ================================================================
     SEITEN-TYPOGRAFIE
  ================================================================ */

  .page-title {
    font-family: var(--cw-font-display);
    font-size: var(--cw-text-4xl);
    font-weight: 800;
    letter-spacing: var(--cw-tracking-tight);
    line-height: var(--cw-leading-tight);
    text-transform: uppercase;
    user-select: none;
    pointer-events: none;
    margin: 0;
  }

  .page-sub {
    font-family: var(--cw-font-body);
    font-size: var(--cw-text-sm);
    font-weight: 300;
    letter-spacing: var(--cw-tracking-wider);
    text-transform: uppercase;
    user-select: none;
    pointer-events: none;
    margin: 0;
  }

  .page-hint {
    position: absolute;
    bottom: var(--cw-space-6);
    font-family: var(--cw-font-body);
    font-size: var(--cw-text-2xs);
    letter-spacing: var(--cw-tracking-wider);
    text-transform: uppercase;
    pointer-events: none;
    animation: cw-nav-pulse 2.2s ease-in-out infinite;
  }

  #pageGreen  .page-title { color: var(--cw-gray-800); }
  #pageGreen  .page-sub   { color: var(--cw-text-muted); }
  #pageGreen  .page-hint  { color: var(--cw-text-faint); }

  #pagePurple .page-title { color: var(--cw-gray-100); }
  #pagePurple .page-sub   { color: var(--cw-gray-600); }
  #pagePurple .page-hint  { color: var(--cw-gray-600); }

  #pageRed    .page-title { color: var(--cw-accent); }
  #pageRed    .page-sub   { color: var(--cw-gray-600); }
  #pageRed    .page-hint  { color: var(--cw-gray-600); }


  /* ================================================================
     LOGO — rollendes Navigationselement

     ZENTRIERUNGS-STRATEGIE:
     #logoAnchor ist fixed, top:27.5vh, left:50%.
     #logoWrap wird per margin-left/margin-top um -50% verschoben.
     JS setzt nur den left-Offset als vw-Wert relativ zur Bildschirmmitte.
     --cw-nav-logo-size und --cw-split-ratio können frei geändert werden —
     alles zentriert sich automatisch neu.
  ================================================================ */

  #logoAnchor {
    position: fixed;
    top: 27.5vh;
    left: 50%;
    width: 0;
    height: 0;
    z-index: var(--cw-z-overlay);
    pointer-events: none;
  }

  #logoWrap {
    position: absolute;
    width: var(--cw-nav-logo-size);
    height: var(--cw-nav-logo-size);
    margin-left: calc(var(--cw-nav-logo-size) / -2);
    margin-top:  calc(var(--cw-nav-logo-size) / -2);
    pointer-events: auto;
    cursor: pointer;
    transform-origin: center calc(50% - 4.26%);
  }
  #logoWrap.no-click {
    pointer-events: none;
    cursor: default;
  }

  /* Split-Hälften — gemeinsame Eigenschaften */
  #splitLeft,
  #splitRight {
    position: absolute;
    height: var(--cw-nav-logo-size);
    margin-top: calc(var(--cw-nav-logo-size) / -2);
    overflow: hidden;
    display: none;
    pointer-events: none;
  }

  /* Breiten asymmetrisch nach Split-Ratio */
  #splitLeft  { width: calc(var(--cw-nav-logo-size) * var(--cw-split-ratio)); }
  #splitRight { width: calc(var(--cw-nav-logo-size) * (1 - var(--cw-split-ratio))); }

  #splitLeft.clickable,
  #splitRight.clickable {
    pointer-events: auto;
    cursor: pointer;
  }

  /* Ball-Form */
  .ball {
    border-radius: 50%;
    background: transparent;
    position: relative;
    overflow: visible;
  }
  #logoWrap .ball {
    width: var(--cw-nav-logo-size);
    height: var(--cw-nav-logo-size);
    transform-origin: center calc(50% - 4.26%);
  }

  /* half-ball: voller Ball hinter dem Clip-Fenster der jeweiligen Hälfte.
     splitRight verschiebt den Ball um die linke Breite nach links,
     sodass genau die rechte Hälfte (W) sichtbar ist. */
  .half-ball {
    width: var(--cw-nav-logo-size);
    height: var(--cw-nav-logo-size);
    position: absolute;
    top: 0;
    left: 0;
  }
  #splitRight .half-ball {
    left: calc(var(--cw-nav-logo-size) * var(--cw-split-ratio) * -1);
  }

  /* Logo-SVG zentriert im Ball */
  .ball img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    user-select: none;
  }

  /* Glow-Puls wenn klickbar */
  #logoWrap:not(.no-click),
  #splitLeft.clickable,
  #splitRight.clickable {
    animation: cw-nav-glow 1.8s ease-in-out infinite;
  }

  /* Tooltip */
  #logoTip {
    position: fixed;
    z-index: var(--cw-z-dropdown);
    font-family: var(--cw-font-body);
    font-size: var(--cw-text-2xs);
    letter-spacing: var(--cw-tracking-wider);
    text-transform: uppercase;
    white-space: nowrap;
    pointer-events: none;
    background: var(--cw-gray-900);
    color: var(--cw-text-dark);
    padding: 4px 10px;
    border-radius: var(--cw-r-pill);
    opacity: 0;
    transition: opacity var(--cw-dur-fast) var(--cw-ease-out);
  }
  #logoTip.show { opacity: 1; }


  /* ================================================================
     KEYFRAMES
  ================================================================ */

  @keyframes cw-nav-pulse {
    0%, 100% { opacity: 0.4; transform: translateY(0); }
    50%       { opacity: 1;   transform: translateY(-4px); }
  }

  @keyframes cw-nav-glow {
    0%, 100% { filter: drop-shadow(0 0 0px var(--cw-accent-glow)); }
    50%       { filter: drop-shadow(0 0 8px var(--cw-accent-glow)); }
  }

}