:root{
  --color1:#FF3F33;
  --color2:rgb(67, 112, 136);
  --color3:#075B5E;
  --color4:#9FC87E;
}

*{
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  direction: ltr;
  text-align: left;
}
    
body {
      font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    }
.outcontent{
  max-width: 1100px;
  margin: auto;
  padding-top: 20px;
  display: flex;
}
.left-content{
  width: 70%;
  padding-right: 20px;
}
    h1 {
      color: var(--color3);
      text-transform: capitalize;
      padding-bottom: 20px;
      margin-bottom: 10px;
      border-bottom: 1px solid var(--color4);
      max-width: 650px;
    }

    .container {
      background: white;
      padding: 30px 60px;
      border-radius: 12px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
      max-width: 600px;
      text-align: center;
      outline: 2px solid var(--color3);
      margin-top: 20px;
      
    }

    .input-group {
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      gap: 15px;
      flex-wrap: wrap;
    }

    label {
      font-weight: 600;
      min-width: 120px;
      text-align: right;
      color: var(--color3);
      user-select: none;
    }

    input[type="number"], input[readonly] {
      flex: 1 1 180px;
      font-size: 1.2em;
      padding: 12px 15px;
      border-radius: 8px;
      border: 1.5px solid var(--color3);
      transition: border-color 0.3s;
      text-align: left;
      min-width: 150px;
      outline: none;
    }

    input[type="number"]:focus {
      border-color: rgb(0, 204, 88);
  
    }

    input[readonly] {
      background: #e6ebff;
      border-color: #a8b8ff;
    }

    button {
      margin-top: 10px;
      background-color: var(--color3);
      color: white;
      border: none;
      padding: 10px 18px;
      border-radius: 8px;
      cursor: pointer;
      font-size: 1em;
      user-select: none;
      transition: background-color 0.3s;
    }
    button:hover {
      background-color: var(--color4);
    }

    .buttons-row {
      margin-top: 20px;
      display: flex;
      justify-content: center;
      gap: 15px;
      flex-wrap: wrap;
      
    }

    .result {
      margin-top: 25px;
      font-size: 1.1em;
      color: #444;
    }

    .formula {
      margin-top: 10px;
      font-style: italic;
      color: #666;
      font-size: 0.9em;
      max-height: 200px;
      overflow-wrap: break-word;
      user-select: text;
      display: none; /* caché par défaut */
    }

    @media (max-width: 480px) {
      .input-group {
        flex-direction: column;
        align-items: stretch;
      }
      label {
        text-align: left;
        min-width: auto;
        margin-bottom: 6px;
      }
    }
  
    .conversion-method {
                background: #f3fbff;
                margin-top: 50px;
                 font-family: Arial, sans-serif;
                line-height: 1.6;
                padding: 15px;
            }
            h2 {
                color: var(--color3);
                padding-bottom: 10px;
                padding-left: 10px;
                border-left: 10px solid var(--color3);
                text-transform: capitalize;
                margin-top: 20px;
                margin-bottom: 20px;
            }
            .conversion-method h3 {
                color: rgb(0, 141, 73);;
                margin-top: 20px;
            }
            .formula {
                background: #e8f4fc;
                padding: 10px;
                border-left: 4px solid #3498db;
                font-family: monospace;
                font-size: 1.1em;
            }
            .example {
                background: #e8f8f0;
                padding: 10px;
                border-left: 4px solid #2ecc71;
                font-family: monospace;
            }
            .method-steps ol {
                padding-left: 20px;
            }
            .method-steps li {
                margin-bottom: 10px;
            }


.conversion-table {
                margin: 50px 0;
                font-family: Arial, sans-serif;
            }
            .conversion-table table {
                width: 100%;
                border-collapse: collapse;
                margin-top: 10px;
            }
            .conversion-table th, .conversion-table td {
                padding: 8px 12px;
                border: 1px solid var(--color4);
                text-align: left;
            }
            .conversion-table th {
                background-color: var(--color4);
            }
            .conversion-table tr:nth-child(even) {
                background-color: rgb(236, 255, 244);
            }

 .more-conversions{
  width: 100%;
  display: inline-flex;
 }
 .more-conversions .links{
  list-style-type: none;
 }
.more-conversions .links li{
  background-color: rgb(67, 112, 136);
  padding: 6px;
  border-radius: 5px;
  margin: 5px;
  float: left;
 }
.more-conversions a{
  text-decoration: none;
  color: white;
  font-weight: 400;
}
.more-conversions a:hover{
  text-decoration: underline;
   color: var(--color3);
   transition: 0.3s;
}
.popular-conversions{
  width: 100%;
  list-style-type: none;
}
.popular-conversions li{
  background-color: var(--color3);
  padding: 6px;
  border-radius: 5px;
  margin: 5px;
  float: left;
}
.popular-conversions a{
  text-decoration: none;
  color: white;
  font-weight: 400;
}

@media (max-width: 1100px){
  .left-content{
    width: 100%;
    padding: 20px;
   }
  .right-content{
    display: none;
  }
  h1, .pre-calc-p{
    text-align: center;
    margin: auto;
    width: 100%;
  }
  h2{
    margin-left: 0;
  }
  .conversion-method{
    padding: 0;
  }
  .container{
    margin: auto;
    margin-top: 20px;
  }
}
@media (max-width: 600px){
 .left-content{
  padding: 5px;
 }
 .container{
  width: 98%;
  padding: 10px;
 }
 .container .input-group{
  width: 100%;
  height: 50px ;
  display: block;
  padding: 0;
  margin: 0;
  margin-bottom: 30px;
  }
 
 .input-group input{
  width: 100%;
  margin-top: 6px;
 }
}