Remplace complètement TON `style.css` par cette version finale propre et corrigée :

```css
:root {

  --pink: #ff5f9f;
  --pink-light: #fff4f8;
  --pink-dark: #e64686;

  --blue: #6aa7ff;

  --text: #4a2c37;

  --white: #ffffff;

  --shadow:
    0 15px 40px rgba(0,0,0,0.08);
}

* {

  box-sizing: border-box;
}

body {

  margin: 0;

  font-family: "Poppins", sans-serif;

  background:
    linear-gradient(
      135deg,
      #fff7fb 0%,
      #fff3f7 35%,
      #fffdfc 100%
    );

  color: var(--text);

  min-height: 100vh;

  overflow-x: hidden;

  position: relative;
}

/* Background déco */

body::before {

  content: "";

  position: fixed;

  inset: 0;

  pointer-events: none;

  background:

    radial-gradient(
      circle at top left,
      rgba(255,182,193,0.18),
      transparent 25%
    ),

    radial-gradient(
      circle at bottom right,
      rgba(255,220,180,0.18),
      transparent 25%
    ),

    radial-gradient(
      circle at 80% 20%,
      rgba(255,105,180,0.08),
      transparent 18%
    );

  z-index: -1;
}

.container {

  max-width: 1050px;

  margin: auto;

  padding: 35px 20px 80px;
}

/* HERO */

.hero {

  text-align: center;

  margin-bottom: 45px;
}

.hero-icons {

  font-size: 28px;

  margin-bottom: 15px;
}

h1 {

  margin: 0;

  font-size: 72px;

  line-height: 1;

  font-family:
    "Playfair Display",
    serif;

  color: #4a2c37;
}

h1 span {

  color: var(--pink);
}

.separator {

  width: 120px;

  height: 4px;

  border-radius: 999px;

  background: var(--pink);

  margin: 25px auto;
}

.description {

  max-width: 760px;

  margin: auto;

  line-height: 1.9;

  font-size: 18px;
}

/* VIDEO */

.video-section {

  position: relative;

  margin-bottom: 45px;

  border-radius: 30px;

  overflow: hidden;

  box-shadow:
    0 20px 45px rgba(0,0,0,0.12);
}

#babyVideo {

  width: 100%;

  display: block;

  object-fit: cover;

  aspect-ratio: 16/9;
}

/* CARD */

.card {

  background:
    rgba(255,255,255,0.92);

  backdrop-filter: blur(12px);

  border-radius: 35px;

  padding: 45px;

  box-shadow: var(--shadow);
}

.card-title {

  font-size: 32px;

  font-weight: 700;

  margin-bottom: 35px;
}

/* INPUTS */

.input-grid {

  display: grid;

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

  gap: 20px;

  margin-bottom: 45px;
}

input,
textarea {

  width: 100%;

  border:
    2px solid #ffe1eb;

  border-radius: 18px;

  padding: 18px;

  font-size: 16px;

  outline: none;

  transition: 0.3s;

  font-family: inherit;

  background: white;
}

input:focus,
textarea:focus {

  border-color: var(--pink);

  box-shadow:
    0 0 0 5px
    rgba(255,95,159,0.12);
}

/* QUESTIONS */

.question-block {

  margin-bottom: 55px;
}

.question-number {

  width: 54px;

  height: 54px;

  border-radius: 50%;

  background: var(--pink);

  color: white;

  display: flex;

  align-items: center;

  justify-content: center;

  font-weight: 700;

  margin-bottom: 25px;

  font-size: 24px;
}

.question-block h2 {

  font-size: 34px;

  line-height: 1.45;

  margin-bottom: 35px;
}

/* CHOIX */

.choices {

  display: grid;

  grid-template-columns:
    repeat(
      auto-fit,
      minmax(280px, 1fr)
    );

  gap: 25px;
}

.option-card {

  position: relative;

  display: flex;

  align-items: center;

  gap: 15px;

  padding: 30px;

  border-radius: 30px;

  border:
    3px solid transparent;

  cursor: pointer;

  transition: 0.3s ease;

  overflow: hidden;
}

.option-card:hover {

  transform: translateY(-4px);

  box-shadow:
    0 15px 35px rgba(0,0,0,0.08);
}

.option-card input {

  display: none;
}

.option-card.girl-card {

  background:
    linear-gradient(
      135deg,
      #fff0f6,
      #ffe7f1
    );
}

.option-card.boy-card {

  background:
    linear-gradient(
      135deg,
      #eef5ff,
      #e5f0ff
    );
}

.option-content {

  display: flex;

  align-items: center;

  gap: 18px;

  flex: 1;
}

.option-emoji {

  width: 90px;

  height: 90px;

  border-radius: 50%;

  display: flex;

  align-items: center;

  justify-content: center;

  font-size: 48px;

  background:
    rgba(255,255,255,0.65);
}

.option-title {

  font-size: 34px;

  font-weight: 700;

  margin-bottom: 5px;
}

.option-subtitle {

  font-size: 18px;

  opacity: 0.7;
}

.check-icon,
.radio-circle {

  width: 38px;

  height: 38px;

  border-radius: 50%;

  display: flex;

  align-items: center;

  justify-content: center;

  font-size: 20px;

  font-weight: bold;

  transition: 0.3s;
}

.check-icon {

  background: var(--pink);

  color: white;

  opacity: 0;
}

.radio-circle {

  border: 3px solid #bcd5ff;
}

.option-card.selected {

  transform: scale(1.02);
}

.option-card.girl-card.selected {

  border-color: var(--pink);

  box-shadow:
    0 15px 35px rgba(255,95,159,0.25);
}

.option-card.boy-card.selected {

  border-color: var(--blue);

  box-shadow:
    0 15px 35px rgba(106,167,255,0.25);
}

.option-card.selected .check-icon {

  opacity: 1;
}

.option-card.selected .radio-circle {

  background: var(--blue);

  border-color: var(--blue);
}

.vote-notice {

  margin-top: 20px;

  padding: 18px;

  border-radius: 18px;

  background: #fff8fb;

  font-size: 16px;
}

/* BOUTON */

button {

  width: 100%;

  border: none;

  border-radius: 24px;

  padding: 24px;

  font-size: 22px;

  font-weight: 700;

  background:
    linear-gradient(
      90deg,
      #ff7da8,
      #ff4f87
    );

  color: white;

  cursor: pointer;

  transition: 0.3s;

  box-shadow:
    0 12px 35px
    rgba(255,95,159,0.28);
}

button:hover {

  transform: translateY(-2px);
}

/* RESULTATS */

#result {

  background:
    linear-gradient(
      135deg,
      rgba(255,255,255,0.92),
      rgba(255,245,250,0.96)
    );

  border-radius: 35px;

  padding: 45px 35px;

  margin-top: 45px;

  border:
    1px solid
    rgba(255,192,203,0.25);

  box-shadow:
    0 20px 60px
    rgba(255,105,180,0.08);

  backdrop-filter: blur(10px);
}

.hidden {

  display: none;
}

/* CHART */

.chart-container {

  display: flex;

  justify-content: center;

  margin: 25px 0 40px;
}

.donut-chart {

  position: relative;

  width: 240px;

  height: 240px;
}

svg {

  transform: rotate(-90deg);
}

circle {

  fill: none;

  stroke-width: 18;
}

.bg {

  stroke: #f6eaf1;
}

.girl {

  stroke: var(--pink);

  stroke-linecap: round;

  transition: 1s ease;
}

.boy {

  stroke: var(--blue);

  stroke-linecap: round;

  transition: 1s ease;
}

.chart-center {

  position: absolute;

  inset: 0;

  display: flex;

  flex-direction: column;

  align-items: center;

  justify-content: center;
}

#totalParticipants {

  font-size: 64px;

  font-weight: 700;
}

.chart-center span {

  font-size: 22px;

  opacity: 0.7;
}

/* STATS */

.stats-details {

  display: grid;

  grid-template-columns:
    repeat(
      auto-fit,
      minmax(250px, 1fr)
    );

  gap: 25px;
}

.stat-card {

  position: relative;

  overflow: hidden;

  display: flex;

  align-items: center;

  gap: 20px;

  padding: 30px;

  border-radius: 28px;

  color: white;

  min-height: 150px;

  box-shadow:
    0 12px 35px rgba(0,0,0,0.08);
}

.stat-card::after {

  content: "";

  position: absolute;

  width: 220px;

  height: 220px;

  border-radius: 50%;

  background:
    rgba(255,255,255,0.12);

  bottom: -120px;

  right: -60px;
}

.stat-card.girl-card {

  background:
    linear-gradient(
      135deg,
      #ff89b5,
      #ff5f9f
    );
}

.stat-card.boy-card {

  background:
    linear-gradient(
      135deg,
      #8ec5ff,
      #6aa7ff
    );
}

.stat-card .emoji {

  width: 90px;

  height: 90px;

  border-radius: 50%;

  display: flex;

  align-items: center;

  justify-content: center;

  font-size: 50px;

  background:
    rgba(255,255,255,0.15);
}

.stat-card strong {

  display: block;

  font-size: 34px;

  margin-bottom: 8px;
}

.stat-card p {

  margin: 0;

  font-size: 54px;

  font-weight: 700;
}

/* FOOTER */

footer {

  text-align: center;

  margin-top: 45px;

  font-size: 18px;

  opacity: 0.8;
}

/* MOBILE */

@media (max-width: 768px) {

  h1 {

    font-size: 52px;
  }

  .card {

    padding: 28px;
  }

  .question-block h2 {

    font-size: 24px;
  }

  .option-title {

    font-size: 28px;
  }

  .option-subtitle {

    font-size: 15px;
  }

  .option-emoji {

    width: 70px;

    height: 70px;

    font-size: 36px;
  }

  .stat-card p {

    font-size: 42px;
  }

  #totalParticipants {

    font-size: 50px;
  }
}
```