:root {
  --glow-color: #fff;
}

/* ===== FONT ===== */
@font-face {
  font-family: "Jost";
  font-weight: 300;
  font-style: normal;
  src: url("../fonts/Jost-300-Light.woff2") format("woff2"),
       url("../fonts/Jost-300-Light.woff") format("woff"),
       url("../fonts/Jost-300-Light.ttf") format("truetype");
}

/*@font-face {
  font-family: "Jost";
  font-weight: 400;
  font-style: normal;
  src: url("../fonts/Jost-400-Book.woff2") format("woff2"),
       url("../fonts/Jost-400-Book.woff") format("woff"),
       url("../fonts/Jost-400-Book.ttf") format("truetype");
}

@font-face {
  font-family: "Jost";
  font-weight: 500;
  font-style: normal;
  src: url("../fonts/Jost-500-Medium.woff2") format("woff2"),
       url("../fonts/Jost-500-Medium.woff") format("woff"),
       url("../fonts/Jost-500-Medium.ttf") format("truetype");
}*/

/*
This Font Software is licensed under the SIL Open Font License, Version 1.1.
This license is copied below, and is also available with a FAQ at:
http://scripts.sil.org/OFL

Copyright 2020 The Jost Project Authors (https://github.com/indestructible-type)
*/

/* ===== RESET ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  width: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

body {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #000;
}

/* ===== LOGO ===== */
.logo-start {
  position: fixed;
  bottom: 80px;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 90vh;
  background: #000;
}

.logo-start img {
  width: 66%;
  max-width: 800px;
  height: auto;
}

/* ===== FORM ===== */
form {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* ===== BUTTON ===== */
.glowing-btn {
  position: fixed;
  bottom: 120px;
  padding: 0.35em 1em;
  border: 0.15em solid var(--glow-color);
  border-radius: 0.45em;
  background: none;
  color: var(--glow-color);
  cursor: pointer;

  font-family: "Jost", sans-serif;
  font-size: 1em;
  font-weight: 900;
  letter-spacing: 0.66em;

  perspective: 2em;

  box-shadow:
    inset 0 0 0.5em var(--glow-color),
    0 0 0.5em var(--glow-color);

  animation: border-flicker 2s linear infinite;
}

/* ===== TEXT ===== */
.glowing-txt {
  float: left;
  margin: 0.05em -0.4em 0 0.4em; /*margin: 0.05em -0.6em 0 0.4em;*/

  text-shadow:
    0 0 0.125em hsl(0 0% 100% / 0.3),
    0 0 0.45em var(--glow-color);

  animation: text-flicker 3s linear infinite;
}

/* Varianten */
.faulty-letter { opacity: 0.5; animation: faulty-flicker 2s linear infinite; }
.faulty-letter2 { opacity: 1; animation: faulty-flicker 3s linear infinite; }
.faulty-letter3 { opacity: 1; animation: faulty-flicker 2.4s linear infinite; }

/* ===== GLOW EFFECT ===== */
.glowing-btn::before,
.glowing-btn::after {
  content: "";
  position: absolute;
  inset: 0;
}

.glowing-btn::before {
  opacity: 0.7;
  background: var(--glow-color);
  filter: blur(1em);
  transform: translateY(120%) rotateX(95deg) scale(1, 0.35);
  pointer-events: none;
}

.glowing-btn::after {
  opacity: 0;
  z-index: -1;
  background: var(--glow-color);
  box-shadow: 0 0 2em 0.2em var(--glow-color);
  transition: opacity 100ms linear;
}

/* ===== HOVER ===== */
.glowing-btn:hover {
  color: rgba(0, 0, 0, 0.8);
  text-shadow: none;
  animation: none;
}

.glowing-btn:hover .glowing-txt,
.glowing-btn:hover .faulty-letter,
.glowing-btn:hover .faulty-letter2,
.glowing-btn:hover .faulty-letter3 {
  animation: none;
  opacity: 1;
}

.glowing-btn:hover::before {
  opacity: 1;
  filter: blur(1.5em);
}

.glowing-btn:hover::after {
  opacity: 1;
}

/* ===== ANIMATIONS ===== */
@keyframes faulty-flicker {
  0%, 2% { opacity: 0.1; }
  4%, 19% { opacity: 0.5; }
  21% { opacity: 0.1; }
  23% { opacity: 1; }
  80% { opacity: 0.5; }
  83% { opacity: 0.4; }
  87% { opacity: 1; }
}

@keyframes text-flicker {
  0%, 8%, 12% { opacity: 0.1; }
  2%, 9%, 20%, 30% { opacity: 1; }
  25% { opacity: 0.3; }
  70% { opacity: 0.7; }
  72% { opacity: 0.2; }
  77%, 100% { opacity: 0.9; }
}

@keyframes border-flicker {
  0%, 4% { opacity: 0.1; }
  2%, 8% { opacity: 1; }
  70% { opacity: 0.7; }
  100% { opacity: 1; }
}

/* ===== MOBILE ===== */
@media (max-width: 600px) {
  .glowing-btn {
    font-size: 0.5em;
  }
}