/* Général et Reset */
body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f7f6; 
    color: #333;
    line-height: 1.6;
    display: flex; 
    flex-direction: column;
    min-height: 100vh;
}

.main-content-wrapper { 
    display: flex;
    flex-direction: column;
    flex: 1; 
    width: 100%;
    max-width: 1200px; 
    margin: 0 auto;
    padding: 0 20px; 
    box-sizing: border-box;
}


header {
    background: #333; 
    color: #fff;
    padding: 1rem 0;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    box-sizing: border-box;
}


body > header { 
    background: none;
    color: #2c3e50;
    margin-bottom: 20px; 
    padding: 20px 0;
}

header h1 {
    margin-bottom: 0.5rem;
    font-size: 2.5em;
    color: inherit;
}

header p {
    margin-top: 0;
    font-size: 1.1em;
}

/* Sélecteur de Langue */
.language-switcher {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 15px;
    margin-bottom: 25px;
    z-index: 1000;
    align-items: center;
    flex-wrap: wrap;
    padding: 0 15px;
    box-sizing: border-box;
    max-width: 100%;
}


.language-switcher button {
    
    padding: 8px 15px;
    margin: 0 5px;
    cursor: pointer;
    border-radius: 5px;
    transition: transform 0.2s ease, box-shadow 0.2s ease; 
    font-weight: bold; 
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    flex-shrink: 0;
    min-width: 100px; 
}


.language-switcher button:nth-child(1) { 
    background-color: #007bff; 
    color: white;
    border: 1px solid #0056b3;
}


.language-switcher button:nth-child(2) { 
    background-color: #dc3545; 
    color: white;
    border: 1px solid #b32d3e;
}


.language-switcher button:nth-child(3) { 
    background-color: #f8d7da; 
    color: #fd7e14; 
    border: 1px solid #e2b9bb; 
}


.language-switcher button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}



.language-switcher button:focus,
.language-switcher button:active {
    outline: none; /* Supprime le contour par défaut au focus */
    transform: translateY(0); /* Empêche le mouvement si déjà cliqué */
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}


@media (max-width: 480px) {
    .language-switcher button {
        font-size: 0.8em; 
        min-width: unset;
        flex-grow: 1; 
    }
}

.main-nav-buttons { 
    display: flex;
    flex-wrap: wrap; 
    gap: 10px; 
    justify-content: center; 
    background-color: #f0f0f0; 
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    margin-bottom: 30px; /* Marge sous la navigation */
    max-width: 100%; /* S'assure que ça ne déborde pas */
    box-sizing: border-box;
}

.main-nav-buttons .home-button-wrapper { 
    flex-shrink: 0; 
    margin-right: 15px; 
    align-self: center; 
}

.main-nav-buttons .converter-buttons-grid {
    display: flex;
    flex-direction: column; 
    flex-grow: 1; 
    max-width: calc(100% - 130px); 
    box-sizing: border-box;
}

.main-nav-buttons .converter-buttons-row {
    display: grid; 
    grid-template-columns: repeat(8, 1fr); 
    gap: 8px; 
    margin-bottom: 8px; 
}

.main-nav-buttons .converter-buttons-row:last-child {
    margin-bottom: 0; 
}

.main-nav-buttons a {
    background-color: #007bff;
    color: #fff;
    text-decoration: none;
    padding: 10px 5px; 
    border-radius: 5px;
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.2s ease;
    font-size: 0.85em; 
    white-space: nowrap; 
    text-align: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    min-width: unset; /* La grille gère la largeur */
    display: block; 
}

.main-nav-buttons a.home-button {
    background-color: #6c757d; 
    padding: 10px 15px; 
    font-size: 0.95em; 
}

.main-nav-buttons a:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.main-nav-buttons a.home-button:hover {
    background-color: #5a6268;
}

.main-nav-buttons a.active { 
    background-color: #28a745; 
    font-weight: bold;
    transform: scale(1.02);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.25);
}



.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 25px;
    max-width: 900px;
    width: 100%;
    padding: 0 15px;
    box-sizing: border-box;
    margin: 0 auto 40px auto; 
    flex-grow: 1;
}

.category-item {
    background-color: #ffffff;
    border: none;
    border-radius: 12px;
    padding: 25px 15px;
    text-align: center;
    text-decoration: none;
    color: #2c3e50;
    font-size: 1.1em;
    font-weight: 600;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.category-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.category-item img {
    width: 50px;
    height: 50px;
    margin-bottom: 15px;
    filter: drop-shadow(0 2px 3px rgba(0,0,0,0.1));
}


.converter-container {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    max-width: 800px; 
    width: 100%;
    text-align: center;
    flex-grow: 1;
    margin: 0 auto 30px auto; 
}

.input-group {
    margin-bottom: 20px;
    text-align: left;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #555;
}

.input-row {
    display: flex;
    gap: 10px;
    width: 100%;
}

.input-row input[type="number"],
.input-row input[type="text"],
.input-row select {
    flex: 1;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1rem;
    box-sizing: border-box;
    min-height: 45px;
    width: auto; 
}

.converter-container select { 
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1rem;
    box-sizing: border-box;
    min-height: 45px;
    appearance: none; 
    background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%20viewBox%3D%220%200%20292.4%20292.4%22%3E%3Cpath%20fill%3D%22%23000000%22%20d%3D%22M287%20197.8L158.4%2069.2c-2.4-2.4-5.6-4-9.6-4s-7.2%201.6-9.6%204L5.4%20197.8c-4%204-4%2010.4%200%2014.4s10.4%204%2014.4%200l128.8-128.8L272.6%20212.2c4%204%2010.4%204%2014.4%200s4-10.4%200-14.4z%22%2F%3E%3C%2Fsvg%3E');
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 12px;
    padding-right: 30px;
}

.input-row input[type="number"]:focus,
.input-row select:focus,
.converter-container select:focus {
    border-color: #007bff;
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

#result {
    margin-top: 25px;
    font-size: 1.2rem;
    font-weight: bold;
    color: #28a745;
}


footer {
    text-align: center;
    padding: 20px;
    background: #333; 
    color: #fff;
    margin-top: auto; 
    width: 100%;
    box-sizing: border-box;
}


body > footer { 
    background: none;
    color: #7f8c8d;
    font-size: 0.9em;
    padding-top: 30px;
}


@media (max-width: 992px) { 
    .main-content-wrapper {
        padding: 0 10px; 
    }

    .main-nav-buttons {
        flex-direction: column; 
        align-items: center; 
    }

    .main-nav-buttons .home-button-wrapper {
        margin-right: 0; 
        margin-bottom: 10px; 
        width: 100%; 
        text-align: center;
    }
    .main-nav-buttons a.home-button {
        display: block;
        max-width: 200px; 
        margin: 0 auto; 
    }

    .main-nav-buttons .converter-buttons-grid {
        max-width: 100%; 
    }

    .main-nav-buttons .converter-buttons-row {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr)); 
    }
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }
    .category-grid {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
        gap: 20px;
    }
    .category-item {
        padding: 20px 10px;
        font-size: 1em;
    }
    .category-item img {
        width: 45px;
        height: 45px;
        margin-bottom: 10px;
    }
    .converter-container {
        padding: 20px;
    }
    .input-row {
        flex-direction: column;
        gap: 15px;
    }
    .main-nav-buttons a {
        min-width: unset; 
        flex-grow: 1; 
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.8em;
    }
    .language-switcher button {
        min-width: 80px;
        padding: 7px 10px;
    }
    .category-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    .category-item {
        flex-direction: row;
        justify-content: flex-start;
        padding: 15px;
        font-size: 1.1em;
    }
    .category-item img {
        margin-right: 15px;
        margin-bottom: 0;
        width: 40px;
        height: 40px;
    }
    .converter-container {
        padding: 15px;
    }
    .input-row input[type="number"],
    .input-row select,
    .converter-container select {
        width: 100%;
        min-height: 40px;
        padding: 10px;
    }
    .main-nav-buttons .converter-buttons-row {
        grid-template-columns: 1fr; 
        gap: 5px;
    }
    .main-nav-buttons a {
        width: 100%; 
    }
}