/* ===== HERO CONTAINER ===== */
.hero {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  background: #0a0a0a; /* Fallback */
  isolation: isolate;
  --curtain-open: 0.85;
  --curtain-closed: 0.15;
  --curtain-shade: 0.18;
  --curtain-overlay: 0.23;
  --rail-glow: 0.11;
  --guide-width: clamp(18px, 2.2vw, 42px);
}
.hero::before,
.hero::after {
  content: "";
  position: absolute;
  pointer-events: none;
}
.hero::before {
  top: 0;
  left: 0;
  width: 100%;
  height: clamp(42px, 7vh, 74px);
  z-index: 4;
  background:
    linear-gradient(180deg, rgba(7, 10, 12, 0.98), rgba(25, 30, 33, 0.96) 48%, rgba(5, 7, 9, 0.98)),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.08) 0 1px, transparent 1px 80px);
  border-bottom: 1px solid rgba(190, 200, 205, 0.22);
  box-shadow:
    0 18px 28px rgba(0, 0, 0, 0.34),
    inset 0 -1px 0 rgba(255, 255, 255, 0.08);
}
.hero::after {
  inset: 0;
  z-index: 5;
  background:
    linear-gradient(
      90deg,
      rgba(4, 6, 8, 0.98) 0,
      rgba(22, 27, 30, 0.98) 10px,
      rgba(115, 124, 128, 0.76) 11px,
      rgba(20, 24, 27, 0.98) 17px,
      transparent 17px,
      transparent calc(100% - 17px),
      rgba(20, 24, 27, 0.98) calc(100% - 17px),
      rgba(115, 124, 128, 0.76) calc(100% - 11px),
      rgba(22, 27, 30, 0.98) calc(100% - 10px),
      rgba(4, 6, 8, 0.98) 100%
    );
  box-shadow:
    inset 22px 0 28px rgba(0, 0, 0, 0.32),
    inset -22px 0 28px rgba(0, 0, 0, 0.32);
}

/* ===== HINTERGRUND ===== */
.hero__background {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}
.hero__background img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.95) contrast(1.03) brightness(1.03);
  transform: scale(1.02);
}
.hero__background::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 50% 42%, rgba(255, 255, 255, 0.2), transparent 36%),
    linear-gradient(180deg, rgba(3, 7, 12, 0.06), rgba(3, 7, 12, var(--curtain-shade))),
    linear-gradient(90deg, rgba(1, 8, 14, 0.26), transparent 18%, transparent 82%, rgba(1, 8, 14, 0.26));
}

/* ===== VORHANG CONTAINER ===== */
.hero__curtain {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  will-change: transform;
  cursor: grab;
  /* Startzustand: 85% offen (Normalzustand eines Brandschutzvorhangs) */
  transform: translate3d(0, -85%, 0);
  touch-action: none; /* Verhindert Browser-Scroll bei Touch-Drag */
  filter: drop-shadow(0 20px 28px rgba(0, 0, 0, 0.42));
  overflow: visible;
}
.hero__curtain:active {
  cursor: grabbing;
}
.hero--curtain-moving .hero__curtain {
  filter: drop-shadow(0 28px 40px rgba(0, 0, 0, 0.52));
}

.curtain__assembly {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(8, 10, 12, 0.92), transparent var(--guide-width), transparent calc(100% - var(--guide-width)), rgba(8, 10, 12, 0.92)),
    linear-gradient(180deg, #20262c, #151a1f 72%, #0c0f12);
}

.curtain__assembly::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: url("../assets/curtain-horizontal-fabric-1200w.webp");
  background-image: image-set(
    url("../assets/curtain-horizontal-fabric-1200w.webp") 1x,
    url("../assets/curtain-horizontal-fabric-2400w.webp") 2x
  );
  background-size: cover;
  background-position: center bottom;
  filter: contrast(1.08) saturate(1.02) brightness(0.98);
}

.curtain__assembly::after {
  content: "";
  position: absolute;
  inset: 0 var(--guide-width);
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.2), transparent 16%, transparent 84%, rgba(0, 0, 0, 0.22)),
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), transparent 32%, rgba(0, 0, 0, 0.24));
  mix-blend-mode: soft-light;
}

.curtain__cloth {
  position: absolute;
  top: -1.2%;
  right: var(--guide-width);
  bottom: clamp(14px, 1.9vh, 26px);
  left: var(--guide-width);
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: repeat(8, minmax(0, 1fr));
  overflow: hidden;
  z-index: 2;
  opacity: 0.16;
  mix-blend-mode: soft-light;
  background:
    radial-gradient(ellipse at 50% 78%, rgba(0, 0, 0, 0.34), transparent 44%),
    linear-gradient(90deg, rgba(8, 10, 12, 0.46), transparent 12%, transparent 88%, rgba(8, 10, 12, 0.46));
  box-shadow:
    inset 0 18px 28px rgba(255, 255, 255, 0.055),
    inset 0 -34px 38px rgba(0, 0, 0, 0.5);
}

.curtain__cloth::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 50% 82%, rgba(255, 255, 255, 0.14), transparent 34%),
    linear-gradient(180deg, transparent 0 48%, rgba(0, 0, 0, 0.24));
  mix-blend-mode: soft-light;
}

.curtain__panel {
  position: relative;
  min-width: 0;
  min-height: 0;
  width: 100%;
  transform: translateY(var(--drop)) scaleY(var(--stretch));
  transform-origin: 50% 0;
  will-change: transform, background-position;
  background:
    radial-gradient(ellipse at 50% 74%, rgba(255, 255, 255, 0.11), transparent 34%),
    radial-gradient(ellipse at 50% 100%, rgba(0, 0, 0, 0.3), transparent 48%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.1), transparent 36%, rgba(0, 0, 0, 0.26)),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.018) 0 1px, transparent 1px 8px);
  background-size: 100% 130%, 100% 110%, 100% 100%, auto;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    inset 0 -8px 12px rgba(0, 0, 0, 0.34);
}

.curtain__panel::before,
.curtain__panel::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.curtain__panel::before {
  right: 0;
  bottom: -2px;
  left: 0;
  z-index: 2;
  height: 4px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(0, 0, 0, 0.58) 46%, rgba(255, 255, 255, 0.05)),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.08) 0 2px, transparent 2px 7px);
  box-shadow:
    0 -1px 0 rgba(255, 255, 255, 0.05),
    0 2px 7px rgba(0, 0, 0, 0.42);
}

.curtain__panel::after {
  top: 14%;
  right: 0;
  left: 0;
  z-index: 1;
  height: 74%;
  background:
    radial-gradient(ellipse at 50% 88%, rgba(0, 0, 0, 0.2), transparent 46%),
    linear-gradient(180deg, transparent 0 58%, rgba(0, 0, 0, 0.18));
  opacity: 0.72;
}

.curtain__panel:nth-child(3n) {
  filter: brightness(1.02) contrast(1.04);
}
.curtain__panel:nth-child(4n) {
  filter: brightness(0.98) contrast(1.05);
}
.curtain__panel:nth-child(n + 5) {
  filter: brightness(0.98) contrast(1.06);
}

.curtain__panel:first-child {
  box-shadow:
    inset 0 8px 16px rgba(0, 0, 0, 0.34),
    inset 0 -8px 12px rgba(0, 0, 0, 0.26);
}
.curtain__panel:last-child {
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.06),
    inset 0 -14px 18px rgba(0, 0, 0, 0.46);
}
.curtain__panel:last-child::before {
  display: none;
}

.curtain__weight {
  position: absolute;
  right: var(--guide-width);
  bottom: 0;
  left: var(--guide-width);
  z-index: 4;
  opacity: 0.92;
  height: clamp(14px, 1.9vh, 26px);
  background:
    linear-gradient(180deg, rgba(132, 142, 145, 0.36), rgba(25, 29, 31, 0.98) 34%, rgba(7, 8, 9, 0.98)),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.16) 0 1px, transparent 1px 118px);
  border-top: 1px solid rgba(230, 238, 242, 0.24);
  box-shadow:
    0 -8px 22px rgba(0, 0, 0, 0.35),
    0 10px 22px rgba(0, 0, 0, 0.42);
}

.curtain__weight::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, rgba(255, 65, 22, 0.14), rgba(255, 73, 22, 0.76), rgba(255, 65, 22, 0.14));
  box-shadow: 0 -3px 12px rgba(255, 50, 20, var(--rail-glow));
}

.hero__curtain.is-moving .curtain__panel {
  animation: panelRide 1250ms ease-in-out infinite alternate;
  animation-delay: var(--ride-delay);
}
.hero__curtain.is-moving .curtain__cloth {
  opacity: 0.24;
}
.hero__curtain.is-dragging .curtain__panel {
  animation: panelRide 760ms ease-in-out infinite alternate;
  animation-delay: var(--drag-delay);
}
.hero__curtain.is-dragging .curtain__cloth {
  opacity: 0.28;
}
.hero__curtain.is-settling .curtain__panel {
  animation: panelSettle 780ms cubic-bezier(0.18, 0.86, 0.24, 1) both;
  animation-delay: var(--settle-delay);
}
.hero__curtain.is-settling .curtain__cloth {
  opacity: 0.2;
}
.hero__curtain.is-moving .curtain__weight,
.hero__curtain.is-dragging .curtain__weight {
  animation: weightLoad 900ms ease-in-out infinite;
}
.hero__curtain.is-settling .curtain__weight {
  animation: weightSettle 660ms ease-out both;
}

/* ===== STEUERELEMENTE ===== */
.hero__controls {
  position: absolute;
  bottom: 2rem;
  right: 2rem;
  z-index: 10;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.hero__btn {
  padding: 0.6rem 1.2rem;
  border: 2px solid rgba(255, 255, 255, 0.7);
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.5);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  backdrop-filter: blur(4px);
  transition: background 0.2s, border-color 0.2s;
}
.hero__btn:hover,
.hero__btn:focus-visible {
  background: rgba(232, 83, 30, 0.8); /* accent */
  border-color: #E8531E;
  outline: none;
}
.hero__btn--reset {
  border-color: rgba(232, 83, 30, 0.7);
}
.hero__btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.hero__btn--cancel {
  border-color: rgba(255, 200, 50, 0.7);
  background: rgba(80, 60, 0, 0.6);
}
.hero__btn--cancel:hover,
.hero__btn--cancel:focus-visible {
  background: rgba(200, 150, 30, 0.8);
  border-color: #c89620;
}

/* ===== HERO LOGO (zentriert, ueber dem Vorhang) ===== */
.hero__logo {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 3; /* IMMER ueber Vorhang (z-index: 2) */
  pointer-events: none;
}
.hero__logo svg {
  max-width: 320px;
  width: 80vw;
  height: auto;
  filter: drop-shadow(0 2px 20px rgba(0,0,0,0.6)) drop-shadow(0 0 40px rgba(0,0,0,0.3));
}

/* Logo-Text: Standard dunkelgrau, mit sanftem Übergang */
.logo-text {
  fill: #2b2b27;
  transition: fill 0.4s ease;
}

/* Invertiert: weiße Schrift wenn Vorhang hinter dem Logo */
.hero__logo--inverted .logo-text {
  fill: #ffffff;
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  .hero__curtain {
    transition: none !important;
  }
  .curtain__panel,
  .curtain__weight {
    animation: none !important;
  }
}

@media (max-width: 640px) {
  .hero {
    --guide-width: clamp(14px, 4vw, 24px);
  }
  .hero__background img {
    filter: saturate(0.98) contrast(1.02) brightness(1.06);
  }
  .hero__background::after {
    background:
      radial-gradient(circle at 50% 42%, rgba(255, 255, 255, 0.2), transparent 38%),
      linear-gradient(180deg, rgba(3, 7, 12, 0.04), rgba(3, 7, 12, 0.16)),
      linear-gradient(90deg, rgba(1, 8, 14, 0.2), transparent 18%, transparent 82%, rgba(1, 8, 14, 0.2));
  }
  .curtain__cloth {
    grid-template-columns: 1fr;
    grid-template-rows: repeat(8, minmax(0, 1fr));
  }
}

@keyframes panelRide {
  0% {
    transform: translateY(var(--drop)) scaleY(var(--stretch));
    background-position: 0 0, 0 0, 0 0, 0 0;
  }
  100% {
    transform: translateY(calc(var(--drop) + var(--bounce))) scaleY(calc(var(--stretch) + 0.001));
    background-position: 0 1%, 0 -1%, 0 0, 0 0;
  }
}

@keyframes panelSettle {
  0% {
    transform: translateY(calc(var(--drop) + var(--bounce))) scaleY(calc(var(--stretch) + 0.003));
  }
  44% {
    transform: translateY(var(--drop)) scaleY(calc(var(--stretch) - 0.001));
  }
  72% {
    transform: translateY(calc(var(--drop) + 0.12%)) scaleY(calc(var(--stretch) + 0.001));
  }
  100% {
    transform: translateY(var(--drop)) scaleY(var(--stretch));
  }
}

@keyframes weightLoad {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(1px);
  }
}

@keyframes weightSettle {
  0% {
    transform: translateY(2px);
  }
  45% {
    transform: translateY(-1px);
  }
  100% {
    transform: translateY(0);
  }
}