/* Variables CSS pour une maintenance facile */
:root {
  --lia-font-family: "Instrument Serif", serif;
  --lia-background-color: rgba(0, 0, 0, 0.35);
  --lia-background-transparent: rgba(0, 0, 0, 0);
  --lia-input-background: rgba(255, 255, 255, 0.8);
  --lia-input-background-focus: rgba(255, 255, 255, 1);
  --lia-blur-amount: 100px;
  --lia-blur-amount-webkit: 40px;
  --lia-animation-timing: cubic-bezier(0.4, 0, 0.2, 1);
  --lia-shadow-default: 0 4px 20px rgba(0, 0, 0, 0.15);
  --lia-shadow-focus: 0 4px 25px rgba(0, 0, 0, 0.35);
}

/* Layout principal */
#lia-chat {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: var(--lia-background-transparent);
  backdrop-filter: blur(0);
  -webkit-backdrop-filter: blur(0);
  z-index: 9999;
  opacity: 0;
  transition: all 0.8s var(--lia-animation-timing);
  pointer-events: none;
}

#lia-chat:not(.hidden) {
  opacity: 1;
  background: var(--lia-background-color);
  backdrop-filter: blur(var(--lia-blur-amount));
  -webkit-backdrop-filter: blur(var(--lia-blur-amount-webkit));
  pointer-events: auto;
}

/* Conteneur des titres */
.lia-titles {
  position: absolute;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  width: 100%;
}

.lia-title-line {
  display: flex;
  align-items: baseline;
  justify-content: center;
  margin-bottom: 1.5rem;
  gap: 0.5rem;
}

/* Styles de base des titres */
.lia-title {
  font-family: var(--lia-font-family);
  color: white;
  opacity: 0;
  transform: translateY(20px);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

/* Variantes des titres */
.lia-title.hey {
  font-size: 5rem;
  font-style: italic;
  animation: fadeUpIn 0.5s ease-out forwards 0.3s;
}

.lia-title.intro {
  font-size: 5rem;
  animation: fadeUpIn 0.5s ease-out forwards 0.6s;
}

.lia-title.help {
  font-size: 2.5rem;
  animation: fadeUpIn 0.5s ease-out forwards 0.9s;
}

/* Zone de saisie */
.lia-input {
  position: fixed;
  bottom: 10%;
  left: 0;
  right: 0;
  margin: 0 auto;
  width: 90%;
  max-width: 800px;
  opacity: 0;
  animation: fadeUpIn 0.5s ease-out forwards 1.2s;
  display: flex;
  justify-content: center;
  align-items: center;
}

#lia-input-field {
  width: 100%;
  padding: 20px 100px 20px 30px;
  border: none;
  border-radius: 20px;
  font-family: var(--lia-font-family);
  font-size: 20px;
  color: #333;
  background: var(--lia-input-background);
  box-shadow: var(--lia-shadow-default);
  transition: all 0.3s ease;
  position: relative;
  left: 50%;
  transform: translateX(-50%);
}

#lia-input-field:focus {
  outline: none;
  box-shadow: var(--lia-shadow-focus);
  background: var(--lia-input-background-focus);
  border-radius: 30px;
}

#lia-input-field::placeholder {
  font-family: var(--lia-font-family);
  font-style: italic;
  color: #999;
}

/* Bouton d'envoi */
#lia-send {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  padding: 12px 25px;
  border: none;
  border-radius: 10px;
  background-color: #e4e4e4;
  color: #666;
  font-family: var(--lia-font-family);
  font-size: 20px;
  cursor: pointer;
  transition: all 0.3s ease;
  overflow: hidden;
}

#lia-send::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 250%;
  height: 250%;
  background: conic-gradient(
    from 0deg at 50% 50%,
    #ffd1dc,
    #ffacc7,
    #ffffff,
    #ff8eb4,
    rgb(255, 84, 141),
    #ff6b99,
    #ffffff,
    #ffacc7,
    #ffd1dc
  );
  transform-origin: center;
  transform: translate(-50%, -50%);
  filter: blur(20px);
  border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
  opacity: 0;
  transition: opacity 0.3s ease;
  animation: morphingGradient 12s ease infinite;
  z-index: -1;
}

@keyframes morphingGradient {
  0% {
    transform: translate(-50%, -50%) rotate(0deg);
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
  }
  25% {
    border-radius: 40% 60% 70% 30% / 30% 60% 40% 70%;
  }
  50% {
    transform: translate(-50%, -50%) rotate(180deg);
    border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%;
  }
  75% {
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
  }
  100% {
    transform: translate(-50%, -50%) rotate(360deg);
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
  }
}

#lia-send:hover {
  color: white;
}

#lia-send:hover::before {
  opacity: 1;
}

.lia-input:focus-within #lia-send {
  border-radius: 20px;
}
/* Animations */
@keyframes blurIn {
  from {
    background: var(--lia-background-transparent);
    backdrop-filter: blur(0);
    -webkit-backdrop-filter: blur(0);
  }
  to {
    background: var(--lia-background-color);
    backdrop-filter: blur(var(--lia-blur-amount));
    -webkit-backdrop-filter: blur(var(--lia-blur-amount-webkit));
  }
}

@keyframes blurOut {
  from {
    background: var(--lia-background-color);
    backdrop-filter: blur(var(--lia-blur-amount));
    -webkit-backdrop-filter: blur(var(--lia-blur-amount-webkit));
  }
  to {
    background: var(--lia-background-transparent);
    backdrop-filter: blur(0);
    -webkit-backdrop-filter: blur(0);
  }
}

@keyframes fadeUpIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeOutDown {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(30px);
  }
}

/* États spéciaux */

.lia-entering {
  animation: blurIn 0.8s var(--lia-animation-timing) forwards;
}

.lia-exiting {
  animation: blurOut 0.4s var(--lia-animation-timing) forwards 0.3s;
  background: var(--lia-background-color);
  backdrop-filter: blur(var(--lia-blur-amount));
  -webkit-backdrop-filter: blur(var(--lia-blur-amount-webkit));
}

.lia-exiting .lia-title.hey {
  animation: fadeOutDown 0.3s var(--lia-animation-timing);
}

.lia-exiting .lia-title.intro {
  animation: fadeOutDown 0.3s var(--lia-animation-timing);
}

.lia-exiting .lia-title.help {
  animation: fadeOutDown 0.3s var(--lia-animation-timing);
}

.lia-exiting .lia-input {
  animation: fadeOutDown 0.3s var(--lia-animation-timing);
}

/* Mode conversation */
#lia-chat.conversation-active .lia-title,
#lia-chat.conversation-active .lia-input {
  animation: none;
  opacity: 1;
  transform: translateY(0);
}

/* Ouverture rapide */
#lia-chat.quick-open .lia-title,
#lia-chat.quick-open .lia-input {
  animation: quickFadeIn 0.3s ease-out forwards;
}

/* Utilitaires */
.hidden {
  display: none !important;
}

body.lia-active {
  overflow: hidden !important;
  padding-right: 15px;
}

/* Media Queries */
@media (max-width: 768px) {
  .lia-title.hey,
  .lia-title.intro {
    font-size: 3.5rem;
  }

  .lia-title.help {
    font-size: 2rem;
  }

  .lia-input {
    bottom: 5%;
    width: 95%;
  }

  #lia-input-field {
    padding: 15px 80px 15px 20px;
    font-size: 1rem;
  }
}