* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: #e9ecff;
  line-height: 1.6;
  background:
    radial-gradient(900px 500px at 15% 10%, rgba(255,0,0,.10), transparent 60%),
    radial-gradient(800px 520px at 85% 15%, rgba(120,0,0,.14), transparent 62%),
    radial-gradient(900px 650px at 50% 120%, rgba(0,120,255,.06), transparent 60%),
    linear-gradient(180deg, #020203 0%, #05060a 55%, #020203 100%);
}

/*LAYOUT*/
header, nav, main, section, aside, footer {
  width: min(1100px, 92%);
  margin-left: auto;
  margin-right: auto;
}
.layout-geschichte{
    display:grid;
    grid-template-columns: 2.2fr 1fr;
    gap: 22px;
}
.layout-geschichte aside{
    font-size:14px;
}

.layout-home{
  display: grid;
  
  gap: px;
  align-items: start;
}

.home-intro{ grid-column: 1; }
.home-text{  grid-column: 1; grid-row:2/ span 2; }
.home-aside{ grid-column: 2; grid-row: 1 / span 2; }

/*LINKS*/
a { color: #ffb3b3; text-decoration: none; }
a:hover { color: #ffffff; }

/*HEADER*/
header {
  margin-top: 18px;
  padding: 26px 18px;
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,.12);
  background: linear-gradient(180deg, rgba(255,255,255,.07), rgba(255,255,255,.02));
  box-shadow: 0 18px 70px rgba(0,0,0,.65);
  position: relative;
  overflow: hidden;
}

header::before {
  content:"";
  position:absolute;
  inset:0;
  background: radial-gradient(700px 260px at 20% 0%, rgba(255,0,0,.25), transparent 60%);
  opacity:.25;
  pointer-events:none;
}

header h1 {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: .08em;
  position: relative;
  text-shadow: 2px 0 red;
}

header h1[data-text]::before,
header h1[data-text]::after {
  content: attr(data-text);
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
}

header h1[data-text]::before {
  color: red;
  clip-path: inset(0 0 50% 0);
  animation: glitch1 2.5s infinite;
}

header h1[data-text]::after {
  color: rgb(255, 30, 0);
  clip-path: inset(50% 0 0 0);
  animation: glitch2 2.2s infinite;
}

@keyframes glitch1 {
  0% { transform: translate(0); }
  50% { transform: translate(-2px,-1px); }
  100% { transform: translate(0); }
}
@keyframes glitch2 {
  0% { transform: translate(0); }
  50% { transform: translate(2px,1px); }
  100% { transform: translate(0); }
}

header p {
  margin-top: 8px;
  color: rgba(233,236,255,.75);
}

aside{
    justify-content: right;
}
nav {
  margin: 16px auto 24px;
  padding: 12px;
  border-radius: 16px;
  border: 1px solid rgba(255,0,0,.35);
  background: rgba(0,0,0,.55);
  box-shadow: 0 0 30px rgba(255,0,0,.15);
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

nav li { margin: 0; padding: 0; }

nav a {
  display: inline-block;
  padding: 6px 8px;
  border: none;
  background: none;
  border-radius: 0;
  transition: .2s ease;
}

nav a:hover,
nav a.active {
  color: #ff3b3b;
  text-shadow: 0 0 8px rgba(255,0,0,.6);
}


section, aside {
  margin: 18px auto;
  padding: 18px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.12);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  box-shadow: 0 14px 55px rgba(0,0,0,.6);
}

p {
  margin: 0 0 12px;
  color: rgba(233,236,255,.82);
}
strong, b { color: #fff; }

ul, ol { padding-left: 22px; margin-top: 12px; }

ul li, ol li {
  margin: 8px 0;
  padding: 10px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.12);
  background: linear-gradient(180deg, rgba(0,0,0,.65), rgba(20,0,0,.55));
}

/*CHARAKTERE*/
section.characters{
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
}

.characters{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 18px;
}

.char-card{
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.55);
  box-shadow: 0 12px 40px rgba(0,0,0,.75);
  overflow: hidden;
}

.char-toggle{
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
}

.char-img{
  width: 100%;
  height: 320px;
  object-fit: cover;
  display: block;
}

.char-desc{
  display: none;
  padding: 18px;
  min-height: 320px;
  background: linear-gradient(180deg, rgba(0,0,0,.85), rgba(40,0,0,.85));
  text-align: left;
}

.char-desc h3{ margin-top: 0; }

.char-card.open .char-img{ display: none; }
.char-card.open .char-desc{ display: block; }

.btn-charaktere{
  display: inline-block;
  margin-top: 14px;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid rgba(255,0,0,.6);
  color: #fff;
  background: rgba(255, 0, 0, 0.555);
  font-weight: 600;
  text-decoration: none;
  transition: .2s ease;
}

.btn-charaktere:hover{
  background: rgba(255, 0, 0, 0.822);
  box-shadow: 0 0 14px rgba(255,0,0,.6);
  transform: translateY(-1px);
}
/*ORTE*/
.locations{
    display:grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 18px;
    background: transparent;
    border: none;
    box-shadow:none;
    padding: 0;
}

.location-card{
    border-radius:18px;
    border:1px solid rgba(255,255,255,.12);
    background:rgba(0,0,0,.55);
    box-shadow:0 12px 40px rgba(0,0,0,.65);
    padding: 16px;
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.location-card h3{
    margin: 0 0 8px;
    color:#fff;
}

/*EPISODES*/
.season-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 18px;
  align-items: start;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.season-card{
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.55);
  box-shadow: 0 12px 40px rgba(0,0,0,.75);
  overflow: hidden;
  min-height: 90px;
  padding:18px 18px;
}

.season-header{
  width: 100%;
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  padding: 14px 16px;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.season-title{
  font-weight: 800;
  color:#ffffff;
  font-size:18px;
}

.season-meta{
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,0,0,.35);
  color: rgba(233,236,255,.85);
  font-size: 12px;
}

.season-card:hover{
  border-color: rgba(255,0,0,.55);
  box-shadow: 0 0 0 4px rgba(255,0,0,.12), 0 16px 45px rgba(0,0,0,.7);
}

.season-card.active{
  border-color: rgba(255,0,0,.85);
  box-shadow: 0 0 0 5px rgba(255,0,0,.18), 0 18px 55px rgba(0,0,0,.75);
}

.season-body{
  display: none;
  padding: 0 16px 16px;
  border-top: 1px solid rgba(255,255,255,.10);
  background: rgba(0,0,0,.35);
}

.season-card.open .season-body{
  display: block;
}

.season-card.open{
  border-color: rgba(255,0,0,.55);
  box-shadow: 0 0 0 4px rgba(255,0,0,.10), 0 12px 40px rgba(0,0,0,.75);
}

.episode-list{
  list-style: none;
  margin: 12px 0 0;
  padding: 0;

  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.episode-list li{
  margin: 0;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.12);
  background: linear-gradient(180deg, rgba(0,0,0,0.55), rgba(25,0,0,0.45));
  box-shadow: 0 10px 30px rgba(0,0,0,0.45);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.episode-list li:hover{
  transform: translateY(-2px);
  border-color: rgba(255,0,0,0.45);
  box-shadow: 0 0 0 4px rgba(255,0,0,0.10), 0 14px 40px rgba(0,0,0,0.6);
}

.episode-list li strong{
  display: block;
  margin-bottom: 6px;
  color: #fff;
  font-weight: 700;
}

#panel { display: none !important; }
#panel.open { display: block !important; }

#panel .season-content { display: none !important; }
#panel .season-content.active { display: block !important; }

/*BUTTON*/
section h2{
    display:flex;
    justify-content: center;
}
.btn-center{
    display:flex;
    justify-content:center;
    margin-top: 20px;
}
.geschichte-btn{
  appearance: none;
  border: 1px solid rgba(255,0,0,.6);
  background: linear-gradient(
    180deg,
    rgba(255,0,0,.25),
    rgba(120,0,0,.25)
  );

  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;

  padding: 10px 18px;
  border-radius: 999px;
  cursor: pointer;

  transition: 
    background .2s ease,
    box-shadow .2s ease,
    transform .15s ease;
}


.geschichte-btn:hover{
  background: rgba(255,0,0,.45);
  box-shadow: 0 0 0 4px rgba(255,0,0,.15);
  transform: translateY(-1px);
}


.geschichte-btn:active{
  transform: translateY(0);
  box-shadow: 0 0 0 2px rgba(255,0,0,.2);
}
/*FOOTER*/
footer{
  margin: 30px auto 40px;
  color: rgba(233,236,255,.65);
}

footer p{
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.04);
}

/*RESPONSIVE*/
@media (max-width: 900px){
  .characters{ grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 520px){
  nav a{ padding: 9px 11px; }
  section, aside{ padding: 14px; }
  .characters{ grid-template-columns: 1fr; }
}
@media (max-width: 900px){
  .layout-hawkins{
    grid-template-columns: 1fr;
  }
}
@media (max-width: 520px){
  .locations{
    grid-template-columns: 1fr;
  }
}
@media (max-width: 900px){
  .layout-home{
    grid-template-columns: 1fr;
  }

  .layout-home .home-aside{
    grid-column: 1;
    grid-row: auto;
  }
}
@media (max-width: 520px){
  nav ul{
    justify-content: center;
  }
  nav a{
    font-size: 14px;
    padding: 6px 10px;
  }
}
@media (max-width: 520px){
  .btn-link{
    display: block;
    width: 100%;
    text-align: center;
    padding: 12px 14px;
  }
}