body{
  font-family: Arial, sans-serif;
  margin:0;
  padding:0;
  background:#fff;
  color:#000;
}

.content-container{
  display:flex;
  justify-content:center;
  align-items:stretch;
  flex-wrap:wrap;
  gap:60px;
  padding:20px;
  margin-top:40px;
}

.box{
  flex:1 1 600px;
  background:#fff;
  padding:20px;
  border-radius:15px;
  box-shadow:0 4px 8px rgba(0,0,0,.2);
  min-width:300px;
  max-width:600px;
  border:1px solid #ddd;
  display:flex;
  flex-direction:column;
}

/* --------- Titres + soulignement vert --------- */
.section-title{
  position:relative;
  display:inline-block;
  margin-left:0;
}

.section-title-text{
  margin:0;
  font-weight:bold;
  font-size:22px;
  position:relative;
  z-index:2;
}

.section-title-underline{
  display:block;
  height:8px;
  width:220px;            /* ajuste si besoin */
  border-radius:999px;
  background:linear-gradient(90deg,#0f6c39,#57c063);
  margin-top:10px;
}

/* --------- Form --------- */
label{ margin-bottom:5px; }

input, textarea{
  width:calc(100% - 20px);
  padding:10px;
  margin:10px 0;
  border:1px solid #ccc;
  border-radius:5px;
}

textarea{ min-height:140px; }

/* --------- Boutons verts dégradés --------- */
.submit-button,
.popup-content button{
  background:linear-gradient(90deg,#0f6c39,#57c063);
  color:#fff;
  border:1px solid #0f6c39;
  padding:10px 15px;
  margin:10px 0;
  border-radius:8px;
  font-size:1rem;
  cursor:pointer;
  transition:filter .2s, transform .02s;
  outline:none;
}

.submit-button:hover,
.popup-content button:hover{
  filter:brightness(.92);
}

.submit-button:active,
.popup-content button:active{
  transform:translateY(1px);
}

.submit-button:focus{
  box-shadow:0 0 0 3px rgba(21,128,61,.25);
}

/* --------- Popup --------- */
.popup-container{
  position:fixed;
  z-index:9999;
  inset:0;
  display:none;
  background:rgba(0,0,0,.4);
}

.popup-content{
  background:#fff;
  margin:15% auto;
  padding:20px;
  border:1px solid #888;
  width:80%;
  max-width:600px;
  border-radius:10px;
  text-align:center;
}