/* ==========================================================================
   Gaming Museum – Animationssystem
   Prinzipien: nur transform/opacity (GPU), eine Easing-Sprache,
   Reveals einmalig beim Scrollen, Micro-Interactions auf Hover/Fokus,
   prefers-reduced-motion deaktiviert alles.
   ========================================================================== */

:root {
  --gm-ease: cubic-bezier(0.22, 1, 0.36, 1);      /* entspanntes Aus-Easing */
  --gm-ease-snap: cubic-bezier(0.34, 1.56, 0.64, 1); /* leichter Overshoot */
  --gm-dur: 0.7s;
  --gm-dur-fast: 0.3s;
  --gm-blue: rgba(0, 158, 253, 1);
  --gm-pink: rgba(209, 36, 122, 1);
  --gm-violet: rgba(124, 58, 237, 1);
}

/* --------------------------------------------------------------------------
   Seitenübergänge (Cross-Document View Transitions, progressive enhancement)
   -------------------------------------------------------------------------- */
@view-transition {
  navigation: auto;
}

/* --------------------------------------------------------------------------
   Scroll-Reveal (Klassen werden per JS gesetzt – ohne JS bleibt alles sichtbar)
   -------------------------------------------------------------------------- */
.gm-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--gm-dur) var(--gm-ease), transform var(--gm-dur) var(--gm-ease);
  will-change: opacity, transform;
}

.gm-reveal.gm-in {
  opacity: 1;
  transform: none;
  will-change: auto;
}

/* --------------------------------------------------------------------------
   Hero-Entrance-Sequenz (Logo -> Tagline -> CTAs -> Chevron)
   -------------------------------------------------------------------------- */
@keyframes gm-rise {
  from {
    opacity: 0;
    transform: translateY(26px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.gm-hero-seq > * {
  animation: gm-rise 0.9s var(--gm-ease) both;
}

.gm-hero-seq > *:nth-child(1) { animation-delay: 0.10s; }
.gm-hero-seq > *:nth-child(2) { animation-delay: 0.28s; }
.gm-hero-seq > *:nth-child(3) { animation-delay: 0.46s; }
.gm-hero-seq > *:nth-child(4) { animation-delay: 0.64s; }

/* --------------------------------------------------------------------------
   Navbar: Eingangs-Slide, Scroll-Zustand, Link-Unterstreichung, Scrollspy
   -------------------------------------------------------------------------- */
@keyframes gm-nav-drop {
  from { transform: translateY(-100%); }
  to   { transform: none; }
}

.gm-navbar {
  animation: gm-nav-drop 0.7s var(--gm-ease) both;
  transition: background-color 0.35s ease, box-shadow 0.35s ease;
}

.gm-navbar.gm-scrolled {
  background: rgba(8, 8, 14, 0.82);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.5);
}

.gm-navbar .nav-link {
  position: relative;
}

.gm-navbar .nav-link::after {
  content: "";
  position: absolute;
  left: 0.5rem;
  right: 0.5rem;
  bottom: 0.25rem;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--gm-blue), var(--gm-pink));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--gm-dur-fast) var(--gm-ease);
}

.gm-navbar .nav-link:hover::after,
.gm-navbar .nav-link:focus-visible::after,
.gm-navbar .nav-link.active::after {
  transform: scaleX(1);
}

/* --------------------------------------------------------------------------
   Scroll-Fortschrittsbalken
   -------------------------------------------------------------------------- */
.gm-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 2000;
  pointer-events: none;
}

.gm-progress span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--gm-blue), var(--gm-violet), var(--gm-pink));
  transform: scaleX(0);
  transform-origin: left;
}

/* --------------------------------------------------------------------------
   Karten: Hover-Lift, Glow, sanfter 3D-Tilt (Tilt nur per JS bei pointer:fine)
   -------------------------------------------------------------------------- */
.card.bg-transparent {
  transition: transform 0.25s var(--gm-ease), box-shadow 0.35s var(--gm-ease);
}

.card.bg-transparent:hover {
  transform: translateY(-5px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45), 0 0 28px rgba(124, 58, 237, 0.20);
}

a.card:hover .btn.gm-gradient {
  transform: scale(1.08);
  box-shadow: 0 0 26px rgba(209, 36, 122, 0.5);
}

/* --------------------------------------------------------------------------
   Buttons: Gradient-Shift + Lichtkante (Sheen) auf Hover
   -------------------------------------------------------------------------- */
.btn.gm-gradient {
  position: relative;
  overflow: hidden;
  background-size: 160% 160% !important;
  transition: background-position 0.4s ease, transform 0.25s var(--gm-ease-snap), box-shadow 0.25s ease;
}

.btn.gm-gradient:hover,
.btn.gm-gradient:focus-visible {
  background-position: 85% 50% !important;
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(209, 36, 122, 0.35);
}

.btn.gm-gradient::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 35%, rgba(255, 255, 255, 0.22) 50%, transparent 65%);
  transform: translateX(-130%);
  transition: transform 0.6s ease;
  pointer-events: none;
}

.btn.gm-gradient:hover::before {
  transform: translateX(130%);
}

.btn.btn-outline-light {
  transition: transform 0.25s var(--gm-ease-snap), background-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}

.btn.btn-outline-light:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(0, 158, 253, 0.25);
}

/* MDB hellt den Button-Hintergrund beim Hover auf – Schrift muss dann dunkel sein */
.btn.btn-outline-light:hover,
.btn.btn-outline-light:focus,
.btn.btn-outline-light:active {
  color: #111111 !important;
}

/* --------------------------------------------------------------------------
   Timeline im Modal: Stationen gleiten von ihrer Seite herein,
   die Punkte auf der Linie "ploppen" auf
   -------------------------------------------------------------------------- */
.gm-tl {
  opacity: 0;
  transition: opacity 0.6s var(--gm-ease), transform 0.6s var(--gm-ease);
}

.gm-tl.left-2  { transform: translateX(-36px); }
.gm-tl.right-2 { transform: translateX(36px); }

.gm-tl.gm-in {
  opacity: 1;
  transform: none;
}

.gm-tl::after {
  transform: scale(0);
  transition: transform 0.45s var(--gm-ease-snap) 0.25s;
}

.gm-tl.gm-in::after {
  transform: scale(1);
}

/* --------------------------------------------------------------------------
   Fokus-Sichtbarkeit (Tastatur-Navigation)
   -------------------------------------------------------------------------- */
.gm-navbar .nav-link:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--gm-blue);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   Reduzierte Bewegung: alles aus, Inhalte sofort sichtbar
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .gm-reveal,
  .gm-tl {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .gm-hero-seq > *,
  .gm-navbar {
    animation: none !important;
  }

  .gm-progress {
    display: none;
  }

  .card.bg-transparent,
  .btn.gm-gradient,
  .btn.btn-outline-light {
    transition: none;
  }
}