:root {
  --fond: #0d0f14;
  --texte: #e9e4da;
  --texte-2: #9a948a;
  --accent: #c9a26a;
  --surface: #161a22;
}

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

html,
body,
h1,
p {
  margin: 0;
}

html,
body {
  max-width: 100%;
  overflow-x: hidden;
}

body {
  background: var(--fond);
  color: var(--texte);
  font-family: -apple-system, system-ui, sans-serif;
}

button,
input,
textarea {
  font: inherit;
}

img,
video,
svg,
canvas,
main,
.ecran,
.carte-modale {
  max-width: 100%;
}

[hidden] {
  display: none !important;
}

.ecran {
  display: none;
}

.ecran.actif {
  display: flex;
  flex-direction: column;
}

#ecran-accueil,
#ecran-destination,
#ecran-ancrage,
#ecran-sources {
  min-height: 100svh;
  padding-top: calc(2rem + env(safe-area-inset-top));
  padding-right: calc(1.25rem + env(safe-area-inset-right));
  padding-bottom: calc(2rem + env(safe-area-inset-bottom));
  padding-left: calc(1.25rem + env(safe-area-inset-left));
}

#ecran-retrait,
#ecran-immersion,
#ecran-retour {
  position: fixed;
  inset: 0;
  overflow-y: auto;
  padding-top: calc(2rem + env(safe-area-inset-top));
  padding-right: calc(1.25rem + env(safe-area-inset-right));
  padding-bottom: calc(2rem + env(safe-area-inset-bottom));
  padding-left: calc(1.25rem + env(safe-area-inset-left));
  background: var(--fond);
  touch-action: manipulation;
}

#ecran-accueil {
  justify-content: center;
  gap: 1.5rem;
  text-align: center;
}

#ecran-sources {
  justify-content: flex-start;
  gap: 1.5rem;
}

#contenu-sources {
  width: 100%;
  max-width: 34rem;
  margin-inline: auto;
  text-align: left;
}

#contenu-sources h2 {
  margin: 0 0 1.5rem;
}

#contenu-sources p {
  line-height: 1.6;
}

#contenu-sources a {
  display: inline-block;
  margin-top: 0.5rem;
  color: var(--texte-2);
  text-decoration: underline;
}

#contenu-sources a + p {
  margin-top: 1.5rem;
}

#ecran-destination,
#ecran-ancrage {
  justify-content: flex-start;
  gap: 1rem;
}

#zone-question {
  width: 100%;
}

#zone-question > * + * {
  margin-top: 1rem;
}

#zone-segments,
#texte-retrait,
#segment-retour {
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 1.15rem;
  line-height: 1.65;
}

#texte-retrait {
  transition: opacity 400ms ease;
}

.fondu {
  opacity: 0;
}

input,
textarea {
  width: 100%;
  min-width: 0;
  border: 1px solid #2a303c;
  border-radius: 10px;
  padding: 0.875rem 1rem;
  background: var(--surface);
  color: var(--texte);
  font-size: 16px;
}

textarea {
  min-height: 7rem;
  resize: vertical;
}

input::placeholder,
textarea::placeholder {
  color: var(--texte-2);
}

button {
  width: 100%;
  max-width: 320px;
  margin-inline: auto;
  border: 1px solid #343b48;
  border-radius: 10px;
  padding: 0.9rem 1.25rem;
  background: var(--surface);
  color: var(--texte);
  cursor: pointer;
  touch-action: manipulation;
}

button:active {
  border-color: var(--accent);
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

a {
  color: var(--texte-2);
}

.choix-segmente {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  width: 100%;
  border: 1px solid #2a303c;
  border-radius: 10px;
  overflow: hidden;
}

.choix-segmente label {
  position: relative;
}

.choix-segmente input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.choix-segmente span {
  display: block;
  padding: 0.8rem 1rem;
  color: var(--texte-2);
  text-align: center;
  cursor: pointer;
  touch-action: manipulation;
}

.choix-segmente label + label span {
  border-left: 1px solid #2a303c;
}

.choix-segmente input:checked + span {
  background: var(--surface);
  color: var(--accent);
}

.choix-segmente input:focus-visible + span {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

#ecran-retrait {
  justify-content: center;
  gap: 2.5rem;
  text-align: center;
  transition: background 3s ease;
}

#ecran-retrait.sombre-0 {
  background: var(--fond);
}

#ecran-retrait.sombre-1 {
  background: #0a0c10;
}

#ecran-retrait.sombre-2 {
  background: #06070a;
}

#ecran-retrait.sombre-3 {
  background: #030304;
}

#cercle-respiration {
  width: 120px;
  height: 120px;
  margin-inline: auto;
  border-radius: 50%;
  background: var(--surface);
  box-shadow: 0 0 30px rgba(201, 162, 106, 0.28);
  animation: respiration 10s infinite ease-in-out;
}

@keyframes respiration {
  0% {
    transform: scale(1);
  }

  40% {
    transform: scale(1.35);
  }

  100% {
    transform: scale(1);
  }
}

#ecran-immersion {
  justify-content: space-between;
  gap: 2rem;
}

#zone-segments {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.segment {
  opacity: 0;
  transition: opacity 600ms ease;
}

.segment + .segment {
  margin-top: 1.5rem;
}

.segment.visible {
  opacity: 1;
}

.segment.passe {
  opacity: 0.55;
}

#indicateur-tap,
#texte-reancrage,
#progression-ancrage,
#erreur-destination,
#erreur-cle {
  color: var(--texte-2);
}

#erreur-destination {
  border-left: 2px solid #343b48;
  padding-left: 0.75rem;
}

#indicateur-tap {
  text-align: center;
}

#indicateur-tap.attente {
  animation: attente 1s ease-in-out;
}

@keyframes attente {
  50% {
    opacity: 0.45;
  }
}

#ecran-retour {
  justify-content: center;
  gap: 1.25rem;
}

#modale-cle {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  padding-top: calc(1.25rem + env(safe-area-inset-top));
  padding-right: calc(1.25rem + env(safe-area-inset-right));
  padding-bottom: calc(1.25rem + env(safe-area-inset-bottom));
  padding-left: calc(1.25rem + env(safe-area-inset-left));
  background: rgba(13, 15, 20, 0.88);
}

.carte-modale {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 100%;
  max-width: 420px;
  border: 1px solid #2a303c;
  border-radius: 14px;
  padding: 1.25rem;
  background: var(--surface);
}