/*! HTML5 Boilerplate v7.2.0 | MIT License | https://html5boilerplate.com/ */

/* main.css 2.0.0 | MIT License | https://github.com/h5bp/main.css#readme */
/*
 * What follows is the result of much research on cross-browser styling.
 * Credit left inline and big thanks to Nicolas Gallagher, Jonathan Neal,
 * Kroc Camen, and the H5BP dev community and team.
 */

/* ==========================================================================
   Base styles: opinionated defaults
   ========================================================================== */

html {
  color: #222;
  font-size: 1em;
  line-height: 1.4;
}

/*
 * Remove text-shadow in selection highlight:
 * https://twitter.com/miketaylr/status/12228805301
 *
 * Vendor-prefixed and regular ::selection selectors cannot be combined:
 * https://stackoverflow.com/a/16982510/7133471
 *
 * Customize the background color to match your design.
 */

::-moz-selection {
  background: #b3d4fc;
  text-shadow: none;
}

::selection {
  background: #b3d4fc;
  text-shadow: none;
}

/*
 * A better looking default horizontal rule
 */

hr {
  display: block;
  height: 1px;
  border: 0;
  border-top: 1px solid #ccc;
  margin: 1em 0;
  padding: 0;
}

/*
 * Remove the gap between audio, canvas, iframes,
 * images, videos and the bottom of their containers:
 * https://github.com/h5bp/html5-boilerplate/issues/440
 */

audio,
canvas,
iframe,
img,
svg,
video {
  vertical-align: middle;
}

/*
 * Remove default fieldset styles.
 */

fieldset {
  border: 0;
  margin: 0;
  padding: 0;
}

/*
 * Allow only vertical resizing of textareas.
 */

textarea {
  resize: vertical;
}

/* ==========================================================================
   Browser Upgrade Prompt
   ========================================================================== */

.browserupgrade {
  margin: 0.2em 0;
  background: #ccc;
  color: #000;
  padding: 0.2em 0;
}

/* ==========================================================================
   Author's custom styles
   ========================================================================== */
@font-face {
    font-family: alata;
    src: url(../fonts/alata-regular.ttf);
}

@keyframes slider {
    0% {left: 0; opacity: 0;}
    5% {left: -50%; opacity: 1;}
    15% {left: -50%;}
    20% {left: -50%;}
    25% {left: -50%; opacity: 1;}
    30% {opacity: 0;}
    35% {left: -150%; opacity: 1;}
    40% {left: -150%;}
    45% {left: -150%; opacity: 1;}
    50% {opacity: 0;}
    55% {left: -250%; opacity: 1;}
    60% {left: -250%;}
    65% {left: -250%; opacity: 1;}
    70% {opacity: 0;}
    75% {left: -350%; opacity: 1;}
    80% {left: -350%;}
    85% {left: -350%;}
    90% {left: -350%; opacity: 1;}
    95% {opacity: 0;}
    100% {left: -450%;}
}

@keyframes pulse_animation {
    0% { transform: scale(1); }
    30% { transform: scale(1); }
    40% { transform: scale(1.08); }
    50% { transform: scale(1); }
    60% { transform: scale(1); }
    70% { transform: scale(1.05); }
    80% { transform: scale(1); }
    100% { transform: scale(1); }
}

@keyframes rotate {
    25% {transform: rotate(90deg);}
    50% {transform: rotate(180deg);}
    75% {transform: rotate(270deg);}
    100% { transform: rotate(360deg);}
}

/* ==========================================================================
   Elementi comuni
   ========================================================================== */

body {
    min-width: 320px;
    grid-area: main;
    background-image: url("../img/background.png");
    background-repeat: no-repeat;
    background-size: contain;
    background-position: center 18em;
    color: #2269ff;
    font-family: alata;
}

main {
    text-align: center;
}

.secondary-page {
	background-position: center;
}

.button {
    background-color: #2269ff;
    border-radius: 10px;
    padding: .6rem 1.2rem;
    color: white;
    border: none;
	font-size: 2rem;
}

h1 {
	margin-top: 0;
}

/* ==========================================================================
   Header
   ========================================================================== */

header {
    max-height: 15rem;
    font-size: 2em;
    margin: 1rem 1rem 0 1rem;
}

#logo {
    max-height: 7rem;
    float: left;
}

nav {
    float: right;
}

#menu {
    visibility: hidden;
    list-style-type: none;
    top: 13%;
    right: 2%;
    z-index: 20;
    margin: 0;
    max-width: 35%;
    position: absolute;
    padding: 15px;
    background: white;
    -webkit-border-radius: .5em;
    -moz-border-radius: .5em;
    -ms-border-radius: .5em;
    border-radius: .5em;
    box-shadow: .1em .1em .2em #2269ff;  
}

#menu-logo:hover {
    animation: rotate;
    animation-duration: 1.5s;
    animation-timing-function: linear;
}

#menu a{
	font-size: 1.5rem;
	text-decoration: none;
	color: inherit;
}

/* ==========================================================================
   Homepage
   ========================================================================== */

#impressum {
    font-size: 2em;
    margin: auto;
}

#slider {
    overflow: hidden;
    max-width: 100%;
    display: block;
    text-align: center;
    margin: auto;
}

#features {
    list-style-type: none;
    font-size: 0;
    padding: 0;
    margin: 0;
    position: relative;
    left: 0;
    width: 500%;
    animation: slider 10s linear infinite;
}

.feature {
    display: inline-block;
    font-size: 1.5rem;
    width: 20%;
}

#features > li > p {
    margin: 0 auto;
    font-size: 2rem;
}

.feature-icon {
    text-align: center;
    max-width: 100%;
}

.feature-icon > img {
    max-width: 5em;
}

.button > a {
	text-decoration: none;
	color: inherit;
}

#download {
    margin: 4rem auto;
    padding: 2rem 0;
    background: rgba(255, 255, 255, 0.5);
}

#download {
    font-size: 2em;
}

#download p {
    margin: 0;
}

#download-icon {
    max-width: 5em;
}

#paypal {
    width: 100%;
    text-align: center;
    font-size: 2em;
	background: rgba(255, 255, 255, 0.7);
	padding: 1rem 0;
	margin: 3rem auto;
}

#paypal > p {
    margin-bottom: 0;
}

#paypal-button-icon {
    max-width: 4em;
}

#paypal-button-icon {
    animation-name: pulse_animation;
    animation-duration: 2000ms;
    transform-origin: 70% 70%;
    animation-iteration-count: infinite;
    animation-timing-function: linear;
}

#paypal-button-icon:hover,
#paypal-button-icon:focus {
    animation-name: unset;
}

/* ==========================================================================
   Cos'è
   ========================================================================== */
#about {
	font-size: 1.2em;
	margin: 4rem auto;
    padding: 2rem 0;
    background: rgba(255, 255, 255, 0.7);
	max-width: 80%;
	min-height: 100vh;
}

/* ==========================================================================
   Download
   ========================================================================== */

#download-page ul {
	margin: auto;
	max-width: 40%;
	text-align: left;	
}

#stable-section {
	font-size: 1.2rem;
}

#testing-section {
	opacity: 0;
	padding: 2rem 0;
	font-size: 1.2rem;
}


/* ==========================================================================
   Documentazione
   ========================================================================== */

#categorie-doc {
	padding: 3rem 0;
	max-width: 80%;
	margin: auto;
	display: flex;
	flex-direction: row;
	flex-wrap: wrap;
	justify-content: space-between;	
}

.categoria {
	width: 20rem;
	height: 10rem;
	border-radius: 15px;
	background-image: linear-gradient(to bottom right, #c025ff 0%, #2269ff 100%);
	margin: 0 0 2rem 0;
	display: flex;
	flex-direction: row;
	justify-content: stretch;
}

.categoria > p {
	background-color: white;
	border-radius: 15px;
	font-size: 1.4em;
	display: flex;
	flex-direction: row;
	justify-content: stretch;
	align-items: center;
	width: 100%;
	margin: 5px;
}

.titolo-categoria > a {
	text-decoration: none;
	color: inherit;
}

.doc-icon {
	max-width: 40%;
	max-height: 100%;
	float: left;
}

.titolo-categoria {
	width: 100%;
}

.no-background {
	background: none;
}

.doc-page {
	text-align: left;
	max-width: 80%;
	margin: auto;
}

.doc-page h1 {
	text-align: center;
}

.gui-interactive {
	font-weight: bold; 
}

.gui-input {
	font-style: italic;
}

.gui-suggestion {
	font-style: italic;
	font-weight: bold;
}

.gui-element {
	text-decoration: underline;
}

.vertical-rectangle {
	display: table;
}

.non-inline {
	max-width: 80%;
	margin: 3em auto;
	box-shadow: .4em .4em .8em #2269ff;
}

.non-inline img {
	max-width: 100%;
}

.inline {
	display: inline;
	margin: 0 .1em;
}

.square {
	max-width: 2em;
}

.rectangle {
	max-height: 2.5em;
}
/* ==========================================================================
   Footer
   ========================================================================== */

footer {
    grid-area: footer;
    background-color: #2269ff;
    text-align: center;
    color: white;
    padding-top: 1rem;
}

#maintainers {
    list-style: none;
    padding: .5rem 0 2rem 0;
    margin: auto;
    text-align: center;
}

#maintainers li {
    display: inline;
    margin: auto;    
}

#maintainers li:first-child {
    margin-right: 10rem;
}

#maintainers a {
    text-decoration: none;
    color: white;
}

#maintainers a:hover {
    text-decoration: underline;
}

/* ==========================================================================
   Helper classes
   ========================================================================== */

/*
 * Hide visually and from screen readers
 */

.hidden {
  display: none !important;
}

/*
* Hide only visually, but have it available for screen readers:
* https://snook.ca/archives/html_and_css/hiding-content-for-accessibility
*
* 1. For long content, line feeds are not interpreted as spaces and small width
*    causes content to wrap 1 word per line:
*    https://medium.com/@jessebeach/beware-smushed-off-screen-accessible-text-5952a4c2cbfe
*/

.sr-only {
  border: 0;
  clip: rect(0, 0, 0, 0);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  white-space: nowrap;
  width: 1px;
  /* 1 */
}

/*
* Extends the .sr-only class to allow the element
* to be focusable when navigated to via the keyboard:
* https://www.drupal.org/node/897638
*/

.sr-only.focusable:active,
.sr-only.focusable:focus {
  clip: auto;
  height: auto;
  margin: 0;
  overflow: visible;
  position: static;
  white-space: inherit;
  width: auto;
}

/*
* Hide visually and from screen readers, but maintain layout
*/

.invisible {
  visibility: hidden;
}

/*
* Clearfix: contain floats
*
* For modern browsers
* 1. The space content is one way to avoid an Opera bug when the
*    `contenteditable` attribute is included anywhere else in the document.
*    Otherwise it causes space to appear at the top and bottom of elements
*    that receive the `clearfix` class.
* 2. The use of `table` rather than `block` is only necessary if using
*    `:before` to contain the top-margins of child elements.
*/

.clearfix:before,
.clearfix:after {
  content: " ";
  /* 1 */
  display: table;
  /* 2 */
}

.clearfix:after {
  clear: both;
}

/* ==========================================================================
   EXAMPLE Media Queries for Responsive Design.
   These examples override the primary ('mobile first') styles.
   Modify as content requires.
   ========================================================================== */
@media only screen and (min-width: 1440px) {
    
	body {
        background-size: contain;
        background-position: center;		
    }
	
	#features {
		margin: 3rem auto;
	}
	
	#menu {
        top: 5rem;
        max-width: 35%;
    }
    
    #download,
    #paypal {
        margin-top: 12rem;
    }
	
	#categorie-doc {
		padding: 8rem 0;
	}
	
	.categoria {
		width: 25rem;
	}
	
    #paypal {
        background: rgba(255, 255, 255, 0.5);        
    }
	
}
    
@media only screen and (max-width: 1024px) {
    
    header {
        text-align: center;
        max-height: 30rem;
    }
        
    #download {
        margin-top: 2rem;
    }
    
    #maintainers li:first-child {
        margin-right: 6rem;
    }
    
}

@media only screen and (min-width: 769px) and (max-width: 840px) {
    
    #categorie-doc {
		justify-content: space-around;
	}
}

@media only screen and (max-width: 768px) {
    
    body {
        background-size: cover;
        background-position: center;
    }
    
    #menu {
        max-width: 60%;
    }
    
    #download {
        background: none;
    }
    
    main {
        background: rgba(255, 255, 255, 0.5);        
    }
	
	#categorie-doc {
		justify-content: center;
	}
}

@media only screen and (max-width: 400px) {
    
    body {
        background: none;
    }
    
    #menu {
        max-width: 100%;
    }
}

@media print,
  (-webkit-min-device-pixel-ratio: 1.25),
  (min-resolution: 1.25dppx),
  (min-resolution: 120dpi) {
  /* Style adjustments for high resolution devices */
}

/* ==========================================================================
   Print styles.
   Inlined to avoid the additional HTTP request:
   https://www.phpied.com/delay-loading-your-print-css/
   ========================================================================== */

@media print {
  *,
  *:before,
  *:after {
    background: transparent !important;
    color: #000 !important;
    /* Black prints faster */
    box-shadow: none !important;
    text-shadow: none !important;
  }
  a,
  a:visited {
    text-decoration: underline;
  }
  a[href]:after {
    content: " (" attr(href) ")";
  }
  abbr[title]:after {
    content: " (" attr(title) ")";
  }
  /*
     * Don't show links that are fragment identifiers,
     * or use the `javascript:` pseudo protocol
     */
  a[href^="#"]:after,
  a[href^="javascript:"]:after {
    content: "";
  }
  pre {
    white-space: pre-wrap !important;
  }
  pre,
  blockquote {
    border: 1px solid #999;
    page-break-inside: avoid;
  }
  /*
     * Printing Tables:
     * https://web.archive.org/web/20180815150934/http://css-discuss.incutio.com/wiki/Printing_Tables
     */
  thead {
    display: table-header-group;
  }
  tr,
  img {
    page-break-inside: avoid;
  }
  p,
  h2,
  h3 {
    orphans: 3;
    widows: 3;
  }
  h2,
  h3 {
    page-break-after: avoid;
  }
}