:root {
    --bg-color: #1e1e1e;
    --card-bg: #2d2d2d;
    --text-color: #e0e0e0;
    --accent-color: #4a90e2;
    --success-color: #4caf50;
    --error-color: #f44336;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

.unit-converter-container * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.unit-converter-container {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.unit-converter-container .container {
    display: flex;
    flex-direction: column;
    min-height: 80vh;
}

.unit-converter-container h1 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--accent-color);
    font-weight: 300;
}

/* Dashboard Styles */
.unit-converter-container #dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.unit-converter-container .category-btn {
    background-color: var(--card-bg);
    border: none;
    border-radius: var(--border-radius);
    padding: 20px 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    color: white;
    text-decoration: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.unit-converter-container .category-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}

.unit-converter-container .category-btn i {
    font-size: 2rem;
    margin-bottom: 10px;
}

/* Conversion Screen Styles */
.unit-converter-container #conversion-screen {
    display: none;
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
}

.unit-converter-container .conversion-header {
    display: flex;
    align-items: center;
    margin-bottom: 25px;
}

.unit-converter-container .back-btn {
    background: none;
    border: none;
    color: var(--accent-color);
    font-size: 1.2rem;
    cursor: pointer;
    margin-right: 15px;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.unit-converter-container .back-btn:hover {
    color: #6aa8f0;
}

.unit-converter-container .conversion-controls {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.unit-converter-container .input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.unit-converter-container label {
    font-weight: 500;
}

.unit-converter-container input, 
.unit-converter-container select {
    padding: 12px 15px;
    border-radius: var(--border-radius);
    border: 1px solid #444;
    background-color: #3a3a3a;
    color: var(--text-color);
    font-size: 1rem;
    transition: var(--transition);
}

.unit-converter-container input:focus, 
.unit-converter-container select:focus {
    outline: none;
    border-color: var(--accent-color);
}

.unit-converter-container .convert-btn {
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: 12px 20px;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 10px;
}

.unit-converter-container .convert-btn:hover {
    background-color: #3a7bc8;
}

.unit-converter-container .result {
    margin-top: 25px;
    padding: 15px;
    border-radius: var(--border-radius);
    background-color: #3a3a3a;
    text-align: center;
    font-size: 1.2rem;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Responsive Design */
@media (max-width: 768px) {
    .unit-converter-container #dashboard {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 15px;
    }
    
    .unit-converter-container .category-btn {
        padding: 15px 10px;
    }
    
    .unit-converter-container #conversion-screen {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .unit-converter-container #dashboard {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .unit-converter-container .category-btn i {
        font-size: 1.5rem;
    }
}