/*GENERAL SETTINGS*/
:root {
    /*global colors*/
    --color-background: #1e1e1e; 
    --color-text: #fffffc; 
    --color-accent: #00ff99; 
    --color-accent-dark: #00cc66; 
    --color-gray: #cccccc; 
    --color-success: #33ff33; 
    --color-warning:  #ffbd2e;
    --color-error: #ff5f56;
    --color-blue: #0087ff; 
    --color-black: #000000;
    --color-lightgray: #cccccc;
    --color-white: #fffffc;
    --color-invalid: #f7ced3; 

    /*vintage monitor colors*/
    --color-monitor-bg: #444;
    --color-monitor-border: #666;
    --color-monitor-btn: #999;

    /*redundant - media queries do not support variables :(*/
    --mobile-breakpoint: 700px;

    --button-width: 15rem;

    /*all animations*/
    --animation-slow: .5s;
    --animation-fast: .3s;

    /*typography*/
    --font-size-default: 16px;
    --font-size-medium: 1.2rem;
    --font-size-large: 2rem;
    --font-size-larger: 3rem;
    --font-size-comically-large: 6rem;
    --font-weight-icon: 900;

    /*fonts*/
    --font-primary: 'Fira Code', monospace;
    --font-secondary: 'Ubuntu Mono', monospace; 
    --font-icons: "Font Awesome 6 Free"; 

    --icon-arrow: "\f061";

    /*margin/padding global*/
    --pad-mar-1: 1rem;
    --pad-mar-2: 2rem;
    --pad-mar-3: 3rem;
    --pad-mar-4: 4rem;
    --pad-mar-5: 5rem;

    /*1 - debug on, 0 - debug off (better not to input other numbers)*/
    --debug-mode: 0;
}

/*general reset + debug borders*/
* {
    box-sizing: border-box;
    font-family: var(--font-primary);
    color: var(--color-text);
    border: calc(var(--debug-mode) * 2px) solid red;
    padding: 0;
    margin: 0;
}

* div {
    border: calc(var(--debug-mode) * 2px) solid blue;
}

section {
    border: calc(var(--debug-mode) * 2px) solid yellow;
}

main {
    border: calc(var(--debug-mode) * 2px) solid pink;
}

html {
    margin: auto;
    border: calc(var(--debug-mode) * 2px) solid black;
}

body {
    background-color: var(--color-background);
    color: var(--color-text);
    border: calc(var(--debug-mode) * 2px) solid green;
}

main, body, section, footer, header{
    width: 100%;
}

ul{
    list-style-type: none;
}

/*###############################################################################################################*/
/*GENERAL LAYOUT - footer sticky to the bottom*/

html{
  height: 100%;
}

body{
  display: flex;
  flex-direction: column;
  flex-wrap: nowrap;
  min-height: 100vh;
}

main{
  flex: 1;
  min-height: 100%; 
  display: flex;
  flex-direction: column;
  padding-bottom: var(--pad-mar-5);
}

footer{
  flex-shrink: 0;
}

/*handle extremely large screens*/
@media (min-width: 2000px){
  main{
    max-width: 2000px;
    margin: auto;
    background-color: var(--color-background);
    box-shadow: 0 0 5px var(--color-black);
  }
  body{
    background-color: var(--color-monitor-bg);
  }
}

/*###############################################################################################################*/
/*ANIMATIONS*/

  /*shake the screen a bit*/
  @keyframes glitch {
    0% { transform: none; }
    20% { transform: skew(-2deg, 0deg) translate(-2px, 0); }
    40% { transform: skew(2deg, 0deg) translate(2px, 0); }
    60% { transform: skew(-1deg, 0deg) translate(-1px, 0); }
    80% { transform: skew(1deg, 0deg) translate(1px, 0); }
    100% { transform: none; }
  }
  
  .glitch-effect {
    animation: glitch 0.3s ease-in-out;
    animation-delay: 20s;
  }
  
  /*glowing text - used to highlight current page in the menu*/
  .glow {
    color: var(--color-accent);
    text-shadow:
      0 0 5px var(--color-accent),
      0 0 10px var(--color-accent-dark),
      0 0 20px var(--color-accent),
      0 0 40px var(--color-success),
      0 0 80px var(--color-success);
  }

  /*glowing button*/
  .glow-btn {
    box-shadow:
      0 0 5px var(--color-accent),
      0 0 20px var(--color-success);
  }

  /*highlight in paragraphs*/
  .highlight {
    color: var(--color-accent);
    text-shadow: 0 0 5px var(--color-success);
    font-weight: bold;
  }

  /*blinking cursor simulation*/
  .typing::after {
    content: "|";
    color: var(--color-accent);
    font-weight: bold;
    animation: cursor 0.7s steps(1) infinite;
  }

  /*flickering text*/
  .flicker{
    animation: flicker 1.5s infinite;
  }

  @keyframes flicker {
    0% {opacity:0;}
    9% {opacity:0;}
    10% {opacity:.5;}
    13% {opacity:0;}
    20% {opacity:.5;}
    25% {opacity:1;}
  }

  @keyframes cursor{
    0%, 49% {
      color: var(--color-accent);
    }
    50%, 100% {
      color: transparent;
    }
  }

  /*sneaky animation 🤫*/
  @keyframes sneaky {
    0% {
      opacity: 0;
      transform: translateY(10px);
    }
    5% {
      opacity: .3;
      transform: translateY(0);
    }
    15% {
      opacity: .3;
      transform: translateY(0);
    }
    20% {
      opacity: 0;
      transform: translateY(-10px);
    }
    100% {
      opacity: 0;
      transform: translateY(-10px);
    }
  }
  
  .sneaky {
    animation: sneaky 5s ease-in-out forwards;
    animation-iteration-count: infinite;
  }
  
  
  
  
/*############################################################################################################*/
/*NAVBAR*/

header{
    background-color: var(--color-black);
    height: var(--pad-mar-4);               
    box-shadow: 0 0 15px var(--color-accent);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;

    /*sticky header*/
    position: sticky;
    top: 0;
}

/*align links into row*/
header ul{
    display: flex;
    flex-flow: row;
    flex-wrap: nowrap;
    gap: var(--pad-mar-2);      
}

header a{
    text-decoration: none;
    font-size: var(--font-size-medium);
}

header a:hover{
    color: var(--color-success);
}

nav{
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  justify-content: center;
  align-items: center;
}

/*hide menu dropdown-opener on larger screens*/
#nav-hamburger{
  display: none;
  font-size: larger;
}

#nav-hamburger:hover{
  color: var(--color-success);
}

/*responsive navbar*/
@media (max-width: 700px){
  header ul{
    flex-flow: column;
    flex-wrap: wrap;
    /*vertical align*/
    align-items: center;
  }

  /*prevent overflow on menu open*/
  header{
    height: auto;
  }

  nav{
    padding: var(--pad-mar-1);
  }

  /*show menu dropdown-opener*/
  #nav-hamburger{
    display: block;
  }

  /*hide all links by defualt*/
  header li:not(:first-of-type){
    display: none;
  }

  /*display links -> dropdown*/
  nav ul.menu-opened li{
    display: block;
  }
}

/*#############################################################################################################*/
/*FOOTER*/

footer{
  background-color: var(--color-black);
  box-shadow: 0 0 15px var(--color-accent);
  display: grid;
  grid-template-columns: 20% 55% 20% 5%;
  grid-template-rows: repeat(2, auto);
  padding-bottom: 1%;
}

/*Neo's choice - image*/
footer img:nth-of-type(1){
  grid-row: 1;
  grid-column: 2;
  align-self: center;
  justify-self: center;
}

/*white rabbit - image*/
 footer img:nth-of-type(2){
  width: 60px;
  grid-area: 2 / 4;
  align-self: center;
  justify-self: center;
} 

footer span:nth-of-type(1){
  grid-area: 2 / 1;
  align-self: end;
}

footer span:nth-of-type(2){
  grid-area: 2 / 3;
  justify-self: end;
  align-self: end;
}

/*responsive footer*/
@media (max-width: 700px){

  /*everything in one column*/
  footer{
    grid-template-columns: 1fr;
    grid-template-rows: repeat(2, auto);
    align-items: center;
    justify-content: center;
    padding-bottom: var(--pad-mar-1);
    padding-left: var(--pad-mar-1);
    padding-right: var(--pad-mar-1);
    
  }

  /*no white rabbit :(*/
   footer img:nth-of-type(2){
    display: none;
  } 

  /* Neo's choice still visible :) */
  footer img:nth-of-type(1){
    grid-row: 1;
    grid-column: 1;
    max-width: fit-content;

    /*responsive img scaling*/
    width: 100%;
    height: auto;
  }

  footer span:nth-of-type(1){
    display: none;
  }

  footer span:nth-of-type(2){
    grid-area: 2 / 1;
    text-align: right;
    margin-right: var(--pad-mar-1);
    overflow: hidden;
  }
}



/*#############################################################################################################*/
/*HOME SECTION*/

/*falling code*/
.home-header{
  height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px var(--color-black);
}

/*filter to darken the falling code*/
.home-header::before{
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('var/matrix-code-animation.gif');
  filter: brightness(50%);
  z-index: -1;
}

/*main page heading - typed by js*/
.home-header h1{
  z-index: 100;
  font-family: var(--font-secondary);
  font-size: var(--font-size-comically-large);
}

/*welcome section*/
.jsem-hackerman{
  display: grid;
  grid-template-rows: repeat(4, auto);
  grid-template-columns: repeat(2, auto);
  width: 100%;
  column-gap: 3%;
  padding-left: 3%;
  padding-right: 3%;
}

/*secondary heading*/
.jsem-hackerman h2{
  grid-row: 1;
  grid-column: 1 / span 2;
  text-align: center;
  padding-top: var(--pad-mar-3);
  padding-bottom: var(--pad-mar-3);
}


.jsem-hackerman p{
  grid-row: 2 / span 2;
  grid-column: 1;
}

.jsem-hackerman img{
  grid-row: 2/ span;
  grid-column: 2;
  width: 70%;
  border-radius: 5px;
}

/*go deeper-btn*/
.jsem-hackerman button{
  grid-row: 3;
  grid-column: 1 / span 2;
  margin-top: var(--pad-mar-3);
  width: var(--button-width);
  height: var(--pad-mar-3);
  background-color: transparent;
  border: var(--color-accent) 2px solid;
  align-self: center;
  justify-self: center;
  border-radius: var(--pad-mar-3);
}

.jsem-hackerman button:hover{
  background-color: var(--color-accent);
  color: var(--color-background);
  transition: var(--animation-fast);
}

@media (max-width: 700px){
  /*everything in one column*/
  .jsem-hackerman{
    display: flex;
    flex-direction: column;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    padding-left: 5%;
    padding-right: 5%;
  }

  .jsem-hackerman p{
    margin-bottom: var(--pad-mar-2);
  }

  .home-header{
    height: 70vh;
  }

  .home-header, .home-header::before{
    max-width: 100%;
  }

  /*force main heading into more lines*/
  .home-header h1{
    word-break: break-word;
    font-size: var(--pad-mar-3);
    white-space: normal;
    overflow-wrap: break-word;
    text-align: center;
  }

  
}

/*#############################################################################################################*/
/*HEADER ON EVERY PAGE EXCEPT HOME*/

.secondary-header{
  text-align: center;
  margin-bottom: var(--pad-mar-3);
  margin-top:  var(--pad-mar-3);
}

/*🤫*/
.secondary-header span{
  font-size: xx-small;
  opacity: .5;
}

.secondary-header h1{
  font-size: var(--font-size-larger);
}



/*#############################################################################################################*/
/*TERMINAL-LIKE CARD*/

/*card wrapper*/
.terminal-card {
  background-color: var(--color-background);
  font-family: var(--font-secondary);
  border: 1px solid var(--color-success);
  border-radius: 8px;
  padding: var(--pad-mar-1);
   margin: var(--pad-mar-1); 
  box-shadow: 0 0 10px rgba(0, 255, 0, 0.2);
  position: relative;
  overflow: hidden;
  line-height: 200%;
}

/*terminal controls*/
.terminal-header {
  display: flex;
  gap: 0.5rem;
  margin-bottom: var(--pad-mar-1);
  align-items: center;
  height: 20px;
}

.terminal-header .button {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
}

.terminal-header .button.close {
  background-color: var(--color-error);
}

.terminal-header .button.minimize {
  background-color: var(--color-warning);
}

.terminal-header .button.maximize {
  background-color: var(--color-success);
}

/*OS info*/
.terminal-card h3 span{
  color: var(--color-accent);
}

/*arrow for better readability*/
.terminal-card .arrow::before{
  content: var(--icon-arrow);
  font-weight: var(--font-weight-icon);
  color: var(--color-blue);
  font-family: var(--font-icons);
  margin-right: var(--pad-mar-1);
}

/*"stripes"*/
.terminal-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 255, 0, 0.03),
    rgba(0, 255, 0, 0.03) 2px,
    transparent 2px,
    transparent 4px
  );
  pointer-events: none;
  z-index: 1;
}

.terminal-card .content {
  position: relative;
  z-index: 2;
  margin-left: var(--pad-mar-1);
}



/*#############################################################################################################*/
/*EDUCATION SECTION*/

.timeline{
  max-width: 800px;
  margin: auto;
  width: 70%;
}

/*actual timeline -> made with borders*/
.timeline p{
  border-top: 3px solid;
  border-image: linear-gradient(to right, var(--color-success) 0%, var(--color-accent) 100%);
  border-image-slice: 1;
  border-width: 3px;
  padding: var(--pad-mar-2);
  /*increase paragraph section*/
  counter-increment: section;
  position: relative;
}

/*circles with numbers*/
.timeline p::before{
  /*assign number to the element dynamically */
  content: counter(section); 
  padding: 10px;
  border-radius: 50%;
  position: absolute;
  width: 1.25rem;
  box-shadow: 0 0 7px var(--color-accent);
  height: 1.25rem;
  font-weight: bold;
  background-color: var(--color-accent-dark);
  text-align: center;
}

.timeline p:nth-child(odd){
  padding-left: 0;
  border-left: 0;
  /*timeline*/
  border-right: 3px solid;
  border-top: 0;
}

/*circle to the right*/
.timeline p:nth-child(odd)::before{
  left: 100%;
  margin-left: -20px;
}

.timeline p:nth-child(even){
  /*timeline*/
  border-left: 3px solid;
  padding-right: 0;
  border-right: 0;
  border-top: 0;
}

/*circle to the left*/
.timeline p:nth-child(even)::before{
  right: 100%;
  margin-right: -20px;
}

.timeline p:last-child{
  border-bottom: 0;
}

/*responsive timeline*/
@media (max-width: 700px){
  /*all content in one column*/
  .timeline{
    width: 90%;
    display: flex;
    flex-direction: column;
    padding-left: var(--pad-mar-1);
  }

  .timeline p{
    border-bottom: 0;
    width: 100%;
    box-sizing: border-box;
  }

  /*move the timeline to the left*/
  .timeline p:nth-child(odd){
    border-right: 0;
    border-left: 3px solid;
    padding-left: var(--pad-mar-2);
  }

  .timeline p:nth-child(even){
    padding-left: var(--pad-mar-2);
  }

  .timeline p:nth-child(odd):before{
    right: 100%;
    margin-right: -20px;
    position: absolute;
    left: 0;
  }
  
}

/*#############################################################################################################*/
/*OLD SCHOOL MONITOR*/

/*card wrapper*/
.monitor-frame{
  background-color: var(--color-monitor-bg);
  padding: var(--pad-mar-1);
  width: 80%;
  max-width: 1000px;
  border-radius: 10px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
  border: 8px solid var(--color-monitor-border);
  margin: auto;
  font-family: var(--font-secondary);
}

.monitor-screen{
  background-color: var(--color-background);
  padding: var(--pad-mar-3);
  color: var(--color-accent);
  min-height: 300px;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap; /*several rows*/
  gap: var(--pad-mar-3);
  justify-content: center;
  position: relative;
}

/*"stripes"*/
.monitor-screen::before{
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 255, 0, 0.03),
    rgba(0, 255, 0, 0.03) 2px,
    transparent 2px,
    transparent 4px
  );
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.monitor-icon{
  display: flex;
  flex-direction: column;
  text-decoration: none;
  align-items: center;
  max-height: fit-content;
}

/*font-awesome icon*/
.monitor-icon i{
  font-size: var(--font-size-larger); 
  margin-bottom: var(--pad-mar-1);
}

/*FA hover*/
.monitor-icon:hover i{
  transform: scale(1.1);
  color: var(--color-accent);
  animation-duration: var(--animation-slow) ;
}

/*buttons*/
.monitor-controls{
  display: flex;
  justify-content: flex-end;
  align-items: center;
  flex-direction: row;
  margin-top: var(--pad-mar-1);
  gap: var(--pad-mar-1);
}

.monitor-button{
  width: 20px;
  background-color: var(--color-background);
  height: 20px;
  border-radius: 5px;
  border: 2px solid var(--color-monitor-btn);
}

.monitor-led{
  width: 15px;
  border-radius: 50%;
  height: 15px;
  background-color: var(--color-success);
  animation: blinkingLed 2.5s infinite;
  box-shadow: 0 0 5px var(--color-success);
}

/*flickering monitor LED*/
@keyframes blinkingLed{
  0%   { opacity: 1; }
  5%   { opacity: 0.4; }
  10%  { opacity: 1; }
  15%  { opacity: 0.6; }
  20%  { opacity: 1; }
  25%  { opacity: 0.2; }
  30%  { opacity: 0.8; }
  40%  { opacity: 1; }
  60%  { opacity: 0.9; }
  80%  { opacity: 1; }
  100% { opacity: 0.7; }
}