styles.css

/*! normalize.css v8.0.1 | MIT License | github.com/necolas/normalize.css */html{line-height:1.15;-webkit-text-size-adjust:100%}body{margin:0}main{display:block}h1{font-size:2em;margin:.67em 0}hr{box-sizing:content-box;height:0;overflow:visible}pre{font-family:monospace,monospace;font-size:1em}a{background-color:transparent}abbr[title]{border-bottom:none;text-decoration:underline;text-decoration:underline dotted}b,strong{font-weight:bolder}code,kbd,samp{font-family:monospace,monospace;font-size:1em}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}img{border-style:none}button,input,optgroup,select,textarea{font-family:inherit;font-size:100%;line-height:1.15;margin:0}button,input{overflow:visible}button,select{text-transform:none}[type=button],[type=reset],[type=submit],button{-webkit-appearance:button}[type=button]::-moz-focus-inner,[type=reset]::-moz-focus-inner,[type=submit]::-moz-focus-inner,button::-moz-focus-inner{border-style:none;padding:0}[type=button]:-moz-focusring,[type=reset]:-moz-focusring,[type=submit]:-moz-focusring,button:-moz-focusring{outline:1px dotted ButtonText}fieldset{padding:.35em .75em .625em}legend{box-sizing:border-box;color:inherit;display:table;max-width:100%;padding:0;white-space:normal}progress{vertical-align:baseline}textarea{overflow:auto}[type=checkbox],[type=radio]{box-sizing:border-box;padding:0}[type=number]::-webkit-inner-spin-button,[type=number]::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}[type=search]::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}details{display:block}summary{display:list-item}template{display:none}[hidden]{display:none}

body {
  font-family: Arial, sans-serif;
  height: 100vh;
  width  :100vw;
}

#full_container 
{
  display: flex;
  flex-direction: column-reverse;
  height: 100vh;
  width  :100vw;
  max-height: 100vh;
  max-width  :100vw;
  overflow:hidden;
}

*, *::after, *::before {
  -webkit-user-select: none;  /* Chrome, Safari, Opera */
  -moz-user-select: none;     /* Firefox */
  -ms-user-select: none;      /* Internet Explorer/Edge */
  user-select: none;          /* Estándar */
  -webkit-user-drag: none;    /* Chrome, Safari, Opera */
  -moz-user-drag: none;       /* Firefox */
  -ms-user-drag: none;        /* Internet Explorer/Edge */
  user-drag: none;            /* Estándar */
  cursor: default;            /* Establecer el cursor por defecto */
}

input[type="number"] {
  width: 50px;
}

#header_section,#settings_section,#buttons_inc_dec_section,#metronome_section,#buttons_grid_section {
  padding: 5px 0px 5px 0px;
  border: 1px solid black;
  background-color:rgba(245, 245, 245, 1);
}

#header_section {
  flex: 0 0 auto;
  background-color:rgba(200, 200, 200, 1);
}

#settings_section {
  flex: 0 0 auto;
  background-color:rgba(220, 220, 220, 1);
}

#buttons_inc_dec_section {
  flex: 0 0 auto;
}

#buttons_grid_section {
  flex: 1 1 auto;
  overflow-y: auto;  
}

#header_section button, #settings_section button, #metronome_section button {
  width:88px;
  height:98px;
}

table {
  border-spacing:0px;
  border-collapse: collapse;
  margin: 0px 10px 0px auto;
}

td {
  border: 1px solid black;
  padding:2px 4px 2px 4px;
  height:100px;
  width:60px;
  text-align: center;
}

button {
  cursor: pointer;
}

.section_title {
  float:left;
  font-size: 40px;  
  padding: 0px 0px 0px 10px;
}

#buttons_inc_dec_section {
  text-align: center;
}

#buttons_inc_dec_container button{
  display:table-cell;
  width:22%;
  height:200px;
  margin: 12px 0px 12px 0px;
}

#buttons_grid_section {
  text-align: center;
}

.button_big_name{
  font-size: 50px;    
}

.button_grid_selected {
  background-color : #0a0;
}

.buttons_grid_row_container button{
  display:table-cell;
  height:200px;
  margin: 12px 0px 12px 0px;
}

hr {
  margin:0px 0px 0px 0px;
}