:root {
  --gelb: #FFCB04;
  --blau: #1f1f1f;
  --rot: #E43B3B;
  --grau: transparent;
  --rand: transparent;
  --page-bg: #161616;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Bebas Neue", system-ui, -apple-system, Segoe UI, Roboto, Inter, Arial, sans-serif;
  color: var(--gelb);

  /* Dezenter, dynamischer Verlauf */
  background: linear-gradient(-45deg,
    #FFCB04,
    #FFE76B,
    #2A2A2A,
    #1F1F1F
  );
  background-size: 300% 300%;
  animation: gradientFlow 30s ease-in-out infinite;
  min-height: 100vh;
}

/* Langsame Bewegung */
@keyframes gradientFlow {
  0%   { background-position: 48% 50%; }
  25%  { background-position: 52% 49%; }
  50%  { background-position: 50% 52%; }
  75%  { background-position: 49% 48%; }
  100% { background-position: 48% 50%; }
}

		  /* Zurück-Button */
.back { display: none; }
@media (min-width: 1200px) {
  .back {
    display: block;
    position: fixed;
    left: 20px;
    top: 20px;
    color: var(--gelb);
    text-decoration: none;
    font-size: 22px;
  }
}
/* Wrapper mit Rand auf allen Geräten */
.wrap {
  max-width: 420px;
  width: calc(100% - 10px);   /* sorgt für ~16px Margin links/rechts */
  margin: 24px auto;
  padding: 16px;
}

/* Überschrift */
h1 {
  display: inline-block;
  position: relative;
  color: var(--gelb);
  font-family: "Bebas Neue", sans-serif;
  font-size: 34px;
  margin: 40px auto 24px;
  text-align: center;
  left: 50%;
  transform: translateX(-50%);
  text-decoration: none;
}

/* animierter Unterstrich */
h1::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 4.5px;
  background-color: var(--gelb);
  width: 0;
  animation: underlineGrow 0.8s ease-out forwards;
  animation-delay: 0.1s;
}

@keyframes underlineGrow {
  from { width: 0; }
  to { width: 100%; }
}

/* Back-Button */
@media (min-width:1200px){
  .grid{ grid-template-columns:repeat(4,1fr); }
  .back {
    display: block;
    position: absolute;
    left: 20px;
    top: 20px;
    color: var(--gelb);
    text-decoration: none;
    font-size: 22px;
  }
}

.sub {
  color: var(--blau);
  margin: 0 0 16px;
}

/* Kalenderbox */
.kalender {
  background: var(--grau);
  border-radius: 16px;
  padding: 12px 12px 16px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, .25);
  max-width: 420px;
  margin: 0 auto;
}

/* Kopfbereich */
.kopf {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.kopf h2 {
  font-size: 20px;
  margin: 0;
  color: var(--blau);
}

.navbtn {
  border: 1px solid var(--blau);
  background: transparent;
  border-radius: 10px;
  padding: 6px 10px;
  cursor: pointer;
}

/* Kalender-Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
}

.grid.header { margin-bottom: 8px; }

.wtag {
  font-size: 16px;
  opacity: .7;
  text-align: center;
  margin: 6px 0;
  color: var(--blau);
}

/* Tage */
.tag {
  aspect-ratio: 1 / 1;
  width: 100%;
  min-width: 36px;
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  font-weight: 700;
  position: relative;
  user-select: none;
  background: #fff;
  color: var(--blau);
  border: 1px solid var(--rand);
}

.tag.frei {
  background: var(--gelb);
  border-color: var(--gelb);
  color: var(--blau);
}

.tag.busy {
  background: #fff;
  color: #97a6b5;
  border-style: dashed;
}

.tag.busy::after {
  content: "✕";
  position: absolute;
  color: var(--rot);
  font-weight: 900;
  font-size: 16px;
  line-height: 1;
  transform: translateY(-1px);
}

.tag.leer { visibility: hidden; }

.tag.sel { border: 2.5px solid var(--blau); }

.tag[aria-disabled="true"] { pointer-events: none; opacity: .7; }

.tag:focus-visible {
  outline: 3px solid #94c6ff;
  outline-offset: 2px;
}

/* Zeit-Auswahl */
.zeit-wrap { margin-top: 16px; }

.zeiten-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.slot {
  appearance: none;
  border: 1px solid var(--rand);
  background: #fff;
  border-radius: 999px;
  padding: 10px 0;
  text-align: center;
  font-weight: 700;
  cursor: pointer;
}

.slot.frei {
  background: var(--gelb);
  border-color: var(--gelb);
  color: var(--blau);
}

.slot.busy {
  background: #fff;
  color: #97a6b5;
  border-style: dashed;
  position: relative;
}

/* ✕ mittig zentriert über dem Slot */
.slot.busy::after {
  content: "✕";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--rot);
  font-weight: 900;
  font-size: 18px;
  pointer-events: none;
}

.slot.sel { border: 2.5px solid var(--blau); }

.slot[aria-disabled="true"] { pointer-events: none; opacity: .7; }

/* CTA */
.cta { margin-top: 16px; }

.btn {
  width: 100%;
  padding: 14px 16px;
  border-radius: 12px;
  font-weight: 800;
  font-size: 16px;
  border: 0;
  cursor: pointer;
  background: var(--gelb);
  color: #1f1f1f;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .12);
}

.btn:disabled { opacity: .6; cursor: not-allowed; box-shadow: none; }

.info {
  margin-top: 8px;
  font-size: 14px;
  color: var(--blau);
  opacity: .6;
  text-align: center;
}