/*
UTILS:
https://www.cssfontstack.com/
*/

:root {
  --color-blue: #597bd5;
  --color-black: black;
  --color-green: green;
  --color-red: red;
  --color-green-progress: #4fc73a;
  
  --main-font-color: var(--color-blue);
  --font-colorAlt: var(--color-green);

  --main-font-size: 18pt; 
  --font-size-smaller: 14pt;
  --font-size-smallerer: 10pt;
  --font-size-larger: 22pt;
  
  --spacing1: 20px;
  
  --body-font-family: 'Petrona'; /*"Garamond";*/

  --maths-font-size: 22pt; /* tested with Petrona 20pt */
  --maths-font-size-sup: 16pt;
  --maths-font-family: 'Petrona'; /*"Garamond";*/
  --maths-font-color: var(--color-blue);
}

/*
FONT ISSUES:
I want a font that looks like MathJax so I can combine normal and MathJx in same line.
Issue is that maby serif fonts have more spacing on bottom than top, making fractions look bad: I tried MathJax_Math-Regular.otf, LMRoman10
Garamond has equal spacing (but does not look like MathJax)
Petrona seems to be a good compromise
*/
@font-face {
  font-family: Petrona;
  src: url(../fonts/Petrona-Regular.ttf);
}


/* --- GENERAL ----------------------------- */


/* FORCE SCROLLBAR IN MOBILES --- */
::-webkit-scrollbar {
    -webkit-appearance: none;
}
::-webkit-scrollbar:vertical {
    width: 12px;
}
::-webkit-scrollbar:horizontal {
    height: 12px;
}
::-webkit-scrollbar-thumb {
    background-color: rgba(0, 0, 0, .5);
    border-radius: 10px;
    border: 2px solid #ffffff;
}
::-webkit-scrollbar-track {
    border-radius: 10px;
    background-color: #ffffff;
}
/* --- */

html,body {
 min-height:100%;  
}

body {
  font-family: var(--body-font-family);
  font-size: var(--main-font-size);
  color:var(--main-font-color);  
  margin:0 calc(8px + 1.5625vw) 0 calc(8px + 1.5625vw)      
}

a {  
  color:inherit;
}
a:link,
a:visited,
a:hover,
a:active {
  color:var(--font-colorAlt);
}

td{
  padding-right: 10px; /* separate columns */
}

#block-element {
  z-index: 999;
  position: fixed;
  left: 0;
  top: 0;
  
  width: 100%;
  height: 100%;

  background-color: lightgrey;
  opacity: 0.5;

  display: none;
}

#backgroundImage {
  z-index: -99;
  position: fixed;
  top:0;
  left: 0;
  width:100%;
  height:100%;
  margin-left: auto;
  margin-right: auto;
  background-repeat: no-repeat;  
  background-position-x: center;
  background-position-y: top;  
  background-size: 23em;
  background-position:-1em -1em; 
  opacity: 0.5;
}


/* --- HELP ----------------------------- */

.roundButton {   
  display: inline-block;
  width:1.5em;
  height:1.5em;
  line-height: 1.5em;
  font-size: var(--font-size-larger);
  background-color: var(--color-green);
  text-align: center;
  vertical-align: center;  
  cursor: pointer;
  border-radius: 50%;
  background-color: lightgrey;  
  color:var(--color-green);
}

.topRight{
    position: absolute;
    top: 5%;
    right: 5%;
}

#helpButton {
    font-family: var(--font-exercises);
    font-size: 150%;
}

#help {
  display: none;
  position:fixed;
  z-index:99;  
  background:lightgray;  
  color:var(--color-green);
  left:10%;
  width:60%;  
  top:10%;
  font-size: var(--font-size-smaller);
  text-align: center;
}
#help ul, li {
  margin:0;
  padding:0;
  list-style-type: none;
  line-height: 1em;
  margin: 1em 0;

}



/* --- MATH NOTATION ----------------------------- */

.mathcross {
  background: linear-gradient(to left top, transparent 47.75%, currentColor 49.5%, currentColor 50.5%, transparent 52.25%);
}

.myMath {
  color:var(--maths-font-color);
  font-family: var(--maths-font-family);
  font-size: var(--maths-font-size); 
}

.numinput{
  
  margin: 0 .2em 0 .2em;
}  

.numinputSolved {  
  pointer-events:none;
}

.exp{  
  font-size: 90%;
}
table.exp  { 
  border-collapse: collapse; 
  border-spacing: 0;
  display: inline-table; 
  vertical-align:middle;
  text-align: center

}
.exp table, .exp td, .exp tr {  
}


.sup {
  vertical-align: super;
  font-size: var(--maths-font-size-sup);
}

.frac{  
}
.frac table { 
  border-collapse: collapse;
  border-spacing: 0pt;
  display: inline-block;     
  vertical-align: middle;
  margin: 0 .2em 0 .2em;
  padding-bottom: .1em; /* align middle of table with middle of = + ... */
} 
.frac tr {
  line-height: 1em; 
  border-bottom: 2pt solid var(--main-font-color);  
  text-align: center;  
}
.frac tr:last-child
{
   border-bottom: none;
}  
.frac td {  
  margin:0;
  padding-top:0pt;
  padding-bottom:0pt;
  padding-left:.2em;
  padding-right:.2em;  
  text-align: center;
  vertical-align: middle;  
}


.myMath input
{
  font-family: var(--maths-font-family);
  font-size: var(--maths-font-size); 
  color: var(--maths-font-color);
  text-align: center;
  
  height:1.2em;
  margin: 1em;
  border: 2px solid lightgrey;

  background: transparent;

  /* Trying to remove variablity on devices :O*/
  -webkit-appearance: none; 
  padding:0;
  margin:0;
  /*--*/

}


/* Remove arrows from numerical input: */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button { /* Chrome, Safari, Edge, Opera */
  -webkit-appearance: none;
  margin: 0;
}

input[type=number] { /* Firefox */
  -moz-appearance: textfield;
}
/*--*/


input.supinput 
{  
  font-size: var(--maths-font-size-sup); 
  text-align: left;
  width:1em; /* TODO ADJUST WIDTH TO EXERCISE (num of chars in sol?) */
  margin: 0pt;
  padding: 0pt;
}

/* -- BEHAVIOUR ------------------------------------------ */
.correct {
  color:var(--color-green) !important;
}
.wrong {
  color:red !important;
}

/* -- GENERAL display ------------------------------------------ */
.container{
  padding: 0px;
  margin: 0px;
}

.button1 {
  font-size: var(--font-size-largest);
}
/* -- ROOM display ------------------------------------------ */

.roomTitle {
  font-weight: bold;
}
.room {
  font-size: var(--font-size-smaller);
  display: inline-block;
  border: 1pt solid;
  margin: 10pt;
  padding: 10pt;
}
/* -- PAGE ------------------------------------------ */

.myheader {
  color:red;
}

.myfooter {  
  margin:0pt;
  margin-bottom: .5em;
  padding: 0pt;
  border-color: var(--font-colorBlue);
  color: var(--font-colorBlue);  
  font-size:50%;
}


.completion{
  color:grey;
  margin-left: 2em;

}


#pageList {
  padding-top:1em;
  padding-bottom:1em;  
}

#pageList table {
    margin-top: 10px;    
}
#pageList tr td {
    padding: 10px 5px;
}
td.pageTitleNotStartedNext {
  color:inherit;
}
td.pageTitleNotStarted {
  color:lightgray;
}
.displayedPoints{
  color:grey;
}

#page_mathtitle{
  color:grey;
  text-align: right;
}

.mathtitle {
  color:grey;
  padding-left: 80px !important;  
  font-size: 80%;
}

.topicProgress {
  width: 100%;
  background-color: lightgrey;
}
.topicProgressBar {
  width: 1%;
  height: 10px;
  background-color: var(--color-green-progress);
}

#credits {
  font-size: var(--font-size-smaller);
  font-style: italic;


}



/* --- EXERCISE PAGE -------------------------------------- */

/* Mode Selector */
.modeSelector {
  margin: 20px 0;
  padding: 15px;
  border: 1px solid lightgrey;
  border-radius: 5px;
  background-color: #f9f9f9;
}

.modeSelector label {
  margin-right: 30px;
  cursor: pointer;
  font-size: var(--main-font-size);
  color: var(--main-font-color);
}

.modeSelector input[type="radio"] {
  margin-right: 8px;
  cursor: pointer;
}

/* Check Answers Button */
.checkAnswersContainer {
  margin: 30px 0;
  padding: 20px 0;
  text-align: center;
  border-top: 2px solid lightgrey;
}

.checkAnswersBtn {
  font-family: var(--body-font-family);
  font-size: var(--maths-font-size);
  padding: 12px 40px;
  background-color: var(--color-green);
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-weight: bold;
  transition: opacity 0.2s;
}

.checkAnswersBtn:hover {
  opacity: 0.8;
}

/* Show Solution Button (per row) */
.showSolutionBtn {
  font-family: var(--body-font-family);
  font-size: 18px; /* Larger for the eye icon */
  margin-right: 15px; /* Space between eye and BOT DE AYUDA button */
  padding: 8px 12px;
  background-color: var(--color-blue);
  color: white;
  border: none;
  border-radius: 50%; /* Make it circular for the eye icon */
  cursor: pointer;
  transition: opacity 0.2s;
  min-width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  float: right;
  position: relative;
}

.showSolutionBtn:hover {
  opacity: 0.8;
}

/* Help Bot Button (per row) */
.helpBotBtn {
  font-family: var(--body-font-family);
  font-size: var(--font-size-smaller);
  margin-right: 10px; /* Space from right edge */
  padding: 6px 20px;
  background-color: var(--color-green);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: opacity 0.2s;
  float: right;
  position: relative;
}

.helpBotBtn:hover {
  opacity: 0.8;
}

/* Row Tick Mark for correct row */
.rowTickMark {
  color: var(--color-green);
  font-size: var(--font-size-larger);
  font-weight: bold;
  margin-left: 20px;
}

/* Revealed Answer */
.revealedAnswer {
  color: var(--color-green);
  font-weight: bold;
  font-size: var(--maths-font-size);
  font-family: var(--maths-font-family);
  margin: 0 .2em 0 .2em;
}

/* Peek Answer (shown while holding button) */
.peekAnswer {
  color: var(--color-green);
  font-weight: bold;
  font-size: var(--maths-font-size);
  font-family: var(--maths-font-family);
  margin: 0 .2em 0 .2em;
  display: inline-block;
  background-color: #e8f5e9;
  padding: 2px 8px;
  border-radius: 3px;
}

.exerciseRow {
  display:inline-block;
  padding-top: var(--spacing1);
  padding-bottom: var(--spacing1);
  padding-left: 1em;
  width: 100%;
  border-top: 1px solid lightgrey;
}

.pageSectionTitle {
  margin-bottom: var(--spacing1);
}
.pageSectionTitle:empty { display:none; }



.debug {
  color:orange;
  font-size: 14pt;
}
hr.debug
{
  border-color: orange;
  border-width: 4pt;
}  


#clock {
  color:grey;
}


.tick{  
  line-height: 0.5em;
  min-width: 2em;
  color:var(--color-green);
  font-size: var(--font-size-smaller);
}
img.tick {
  padding:0pt;
  margin:0pt;  
  display: inline-block;
  width: 0.8em;  
}