/* ============================================================
   LICHTMALER_MUC — INTRO / OPENING SEQUENCE
   Additive Stylesheet, nach site.css und atmosphere.css laden.
   Erzeugt den vorgeschalteten Lichtzeichnungs-Screen vor der
   bestehenden Landingpage (index.html).
   ============================================================ */

:root {
  --intro-black: #0b0b0b;
  --intro-white: #f0eee9;
  --intro-warm: #b89a62;
  --intro-warm-light: #d6bd85;
}

/* Solange das Intro aktiv ist, bleibt die eigentliche Seite
   ruhig im Hintergrund und startet ihre eigenen Animationen
   noch nicht. */
body.intro-active {
  overflow: hidden;
}

body.intro-active .hero-inner,
body.intro-active .hero-inner * {
  animation-play-state: paused !important;
}

.lm-intro {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    radial-gradient(
      circle at 48% 42%,
      rgba(255, 255, 255, 0.018),
      transparent 34%
    ),
    linear-gradient(
      115deg,
      rgba(255, 255, 255, 0.012),
      transparent 32%,
      rgba(255, 255, 255, 0.008) 66%,
      transparent
    ),
    var(--intro-black);
  transition:
    opacity 1400ms cubic-bezier(.19, 1, .22, 1),
    visibility 1400ms;
}

.lm-intro::before {
  content: "";
  position: absolute;
  inset: -40%;
  pointer-events: none;
  opacity: 0.055;
  background-image:
    repeating-radial-gradient(
      circle at 0 0,
      transparent 0,
      rgba(255, 255, 255, 0.18) 0.5px,
      transparent 1px,
      transparent 3px
    );
  background-size: 5px 5px;
  transform: rotate(8deg);
}

.lm-intro::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(
      ellipse at center,
      transparent 42%,
      rgba(0, 0, 0, 0.44) 100%
    );
}

.lm-intro.is-finished {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.lm-intro-stage {
  position: relative;
  z-index: 2;
  width: min(86vw, 1060px);
  padding: 40px;
}

.lm-intro-svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.lm-emboss-base {
  opacity: 0;
  transition: opacity 1600ms cubic-bezier(.19, 1, .22, 1);
}

.lm-emboss-base.is-visible {
  opacity: 1;
}

.lm-emboss-dark {
  fill: none;
  stroke: #080808;
  stroke-width: 4.2;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter:
    drop-shadow(-1.2px -1.2px 0 rgba(255, 255, 255, 0.035))
    drop-shadow(1.8px 2.2px 1.5px rgba(0, 0, 0, 0.95));
}

.lm-emboss-inner {
  fill: none;
  stroke: rgba(255, 255, 255, 0.022);
  stroke-width: 1.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.lm-light-path {
  fill: none;
  stroke: rgba(244, 241, 232, 0.96);
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0;
  filter: url("#lmSoftLight");
}

.lm-light-afterglow {
  fill: none;
  stroke: rgba(236, 229, 212, 0.26);
  stroke-width: 5;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0;
  filter: url("#lmWideGlow");
}

.lm-light-point {
  opacity: 0;
  filter: url("#lmPointGlow");
}

.lm-warm-edge {
  fill: none;
  stroke: url("#lmWarmGradient");
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0;
  filter: url("#lmWarmGlow");
  stroke-dasharray: 75 1200;
  stroke-dashoffset: 1200;
}

.lm-warm-edge.is-moving {
  opacity: 0.72;
  animation: lmWarmSweep 2400ms cubic-bezier(.42, 0, .2, 1) forwards;
}

@keyframes lmWarmSweep {
  0% {
    stroke-dashoffset: 1200;
    opacity: 0;
  }

  15% {
    opacity: 0.72;
  }

  72% {
    opacity: 0.44;
  }

  100% {
    stroke-dashoffset: -400;
    opacity: 0;
  }
}

.lm-intro-enter {
  position: absolute;
  left: 50%;
  bottom: 40px;
  z-index: 4;
  padding: 10px 4px;
  border: 0;
  border-bottom: 1px solid rgba(240, 238, 233, 0.3);
  background: transparent;
  color: rgba(240, 238, 233, 0.56);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  opacity: 0;
  transform: translate(-50%, 10px);
  transition:
    opacity 1100ms ease,
    color 400ms ease,
    transform 1100ms cubic-bezier(.19, 1, .22, 1),
    border-color 400ms ease;
}

.lm-intro-enter.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.lm-intro-enter:hover {
  color: var(--intro-white);
  border-color: rgba(240, 238, 233, 0.8);
}

.lm-intro-enter:focus-visible,
.lm-intro-skip:focus-visible {
  outline: 1px solid var(--intro-white);
  outline-offset: 6px;
}

.lm-intro-skip {
  position: absolute;
  top: 24px;
  right: 28px;
  z-index: 5;
  border: 0;
  background: transparent;
  color: rgba(240, 238, 233, 0.3);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 300ms ease;
}

.lm-intro-skip:hover {
  color: rgba(240, 238, 233, 0.78);
}

@media (max-width: 700px) {
  .lm-intro-stage {
    width: 96vw;
    padding: 20px;
  }

  .lm-intro-skip {
    top: 18px;
    right: 18px;
  }

  .lm-intro-enter {
    bottom: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .lm-light-path,
  .lm-light-afterglow,
  .lm-light-point,
  .lm-warm-edge {
    display: none;
  }

  .lm-emboss-base {
    opacity: 1;
  }

  .lm-intro-enter {
    opacity: 1;
    transform: translate(-50%, 0);
  }

  body.intro-active .hero-inner,
  body.intro-active .hero-inner * {
    animation-play-state: running !important;
  }
}