@import url('https://fonts.googleapis.com/css2?family=Comfortaa:wght@500&family=Comfortaa&display=swap');
:root {
  --bg-gradient-border: linear-gradient(
    to bottom right, 
    hsla(240, 1%, 18%, 0.251) 0%, 
    hsla(240, 2%, 11%, 0) 100%
  ), hsl(240, 2%, 13%);

  --text-color: #f0f0f0;
  --accent-color: #f0f0f0;
  --background: #232323;
  --bg-gradiend-backgroud: linear-gradient(
    to bottom right,
    #232323,
    #171717
  );
  --accent-2-color: #818181;
  --select-color: #ffffff;

  --button: rgba(43, 43, 44, 0.75);
  --button-hover: rgba(53, 53, 54, 0.75);

  --border: hsl(0, 0%, 22%);
  --onyx: hsl(240, 1%, 17%);
  --eerie-black-1: hsl(240, 2%, 13%);
  --eerie-black-2: hsl(240, 2%, 12%);
  --light-gray-70: #f0f0f0;
  --light-gray: rgba(214, 214, 214, 0.7);

  /* typography */
    /* font-family */
  --ff-comfortaa: 'Comfortaa', sans-serif;

    /* font-size */
  --fs-1: 24px;
  --fs-2: 18px;
  --fs-3: 17px;
  --fs-4: 16px;
  --fs-5: 15px;
  --fs-6: 14px;
  --fs-7: 13px;
  --fs-8: 11px;

    /* font-weight */
  --fw-300: 300;
  --fw-400: 400;
  --fw-500: 500;
  --fw-600: 600;

    /* shadow */
  --shadow-1: -4px 8px 24px hsla(0, 0%, 0%, 0.25);
  --shadow-2: 0 16px 30px hsla(0, 0%, 0%, 0.25);
  --shadow-3: 0 16px 40px hsla(0, 0%, 0%, 0.25);
  --shadow-4: 0 25px 50px hsla(0, 0%, 0%, 0.15);
  --shadow-5: 0 24px 80px hsla(0, 0%, 0%, 0.25);

    /* transition  */
  --transition-1: 0.25s ease;
  --transition-2: 0.5s ease-in-out;
}

.center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
  width: 6em
}

/*-----------------------------------*\
  #RESET
\*-----------------------------------*/
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
a { text-decoration: none; }
li { list-style: none; }
img, ion-icon, a, button, time, span { display: block; }
button {
  font: inherit;
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
}
input, textarea {
  display: block;
  width: 100%;
  background: none;
  font: inherit;
}
::selection {
  background: var(--select-color);
}
:focus { outline-color: var(--select-color); }
html { font-family: var(--ff-comfortaa); }

/*-----------------------------------*\
  #REUSED STYLE
\*-----------------------------------*/
.sidebar,
article {
  background: var(--eerie-black-2);
  border: 1px solid var(--border);
  /*border-radius: 20px;*/
  padding: 15px;
  box-shadow: var(--shadow-1);
  z-index: 1;
}
.separator {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin: 16px 0;
}
.icon-box {
  position: relative;
  background: var(--border-gradient-onyx);
  width: 30px;
  height: 30px;
  border-radius: 8px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 16px;
  color: var(--select-color);
  box-shadow: var(--shadow-1);
  z-index: 1;
}
.icon-box::before {
  content: "";
  position: absolute;
  inset: 1px;
  background: var(--eerie-black-1);
  border-radius: inherit;
  z-index: -1;
}
.icon-box ion-icon { --ionicon-stroke-width: 35px; }
article { display: none; }
article.active {
  display: block;
  animation: fade 0.5s ease backwards;
}
@keyframes fade {
  0% { opacity: 0; }
  100% { opacity: 1; }
}

.h2,
.h3,
.h4,
.h5 {
  color: var(--text-color);
  text-transform: capitalize;
}
.h2 { font-size: var(--fs-1); }
.h3 { font-size: var(--fs-2); }
.h4 { font-size: var(--fs-4); }
.h5 {
  font-size: var(--fs-7);
  font-weight: var(--fw-500);
}

.article-title {
  position: relative;
  padding-bottom: 7px;
}
.article-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 3px;
  background: var(--text-color);
  border-radius: 3px;
}
.has-scrollbar::-webkit-scrollbar {
  width: 5px; /* for vertical scrollbar */
  height: 5px; /* for horizontal scrollbar */
}
.has-scrollbar::-webkit-scrollbar-track {
  background: var(--onyx);
  border-radius: 5px;
}
.has-scrollbar::-webkit-scrollbar-thumb {
  background: var(--select-color);
  border-radius: 5px;
}
.has-scrollbar::-webkit-scrollbar-button { width: 20px; }
.content-card {
  position: relative;
  background: var(--border-gradient-onyx);
  padding: 15px;
  padding-top: 45px;
  border-radius: 14px;
  box-shadow: var(--shadow-2);
  cursor: pointer;
  z-index: 1;
}
.content-card::before {
  content: "";
  position: absolute;
  inset: 1px;
  background: var(--bg-gradient-border);
  border-radius: inherit;
  z-index: -1;
}

/*-----------------------------------*\
  #MAIN
\*-----------------------------------*/

main {
  background: var(--bg-gradiend-backgroud);
  min-height: 100vh;
}

/*-----------------------------------*\
  #NAVBAR
\*-----------------------------------*/
.navbar {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: hsla(240, 1%, 17%, 0.75);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 0;
  box-shadow: var(--shadow-2);
  z-index: 5;
}
.navbar-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  padding: 0 10px;
}
.navbar-link {
  color: var(--light-gray);
  font-size: var(--fs-8);
  padding: 20px 7px;
  transition: color var(--transition-1);
}
.navbar-link:hover,
.navbar-link:focus { color: var(--light-gray-70); }
.navbar-link.active { color: var(--select-color); }

/*-----------------------------------*\
  #ABOUT
\*-----------------------------------*/
.about .article-title { margin-bottom: 15px; }
.about-text {
  color: var(--light-gray);
  font-size: var(--fs-6);
  font-weight: var(--fw-300);
  line-height: 1.6;
  width: 100%;
}
.about-text p { margin-bottom: 15px; }
.about-collage {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}
.about-button {
  display: block;
  width: 100%;
  border-width: 2px;
  background-color: var(--button);
  padding: 14px 5px;
  border-color: var(--border);
  border-radius: 18px;
  font-size: var(--fs-6);
  color: var(--text-color);
  cursor: pointer;
  text-align: center;
  margin: 10px;
  margin-top: 10px;
  margin-bottom: 10px;
  transition: 0.3s;
}
.about-button:hover {
  background-color: var(--button-hover);
}
/*-----------------------------------*\
  #RESUME
\*-----------------------------------*/
.article-title { margin-bottom: 30px; }
/* education and experience  */
.timeline { margin-bottom: 30px; }
.timeline .title-wrapper {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 25px;
}
.timeline-list {
  font-size: var(--fs-6);
  margin-left: 45px;
}
.timeline-item { position: relative; }
.timeline-item:not(:last-child) { margin-bottom: 20px; }
.timeline-item-title {
  font-size: var(--fs-6);
  line-height: 1.3;
  margin-bottom: 7px;
}
.timeline-list span {
  color: var(--accent-2-color);
  font-weight: var(--fw-400);
  line-height: 1.6;
}
.timeline-item:not(:last-child)::before {
  content: "";
  position: absolute;
  top: -25px;
  left: -30px;
  width: 1px;
  height: calc(100% + 50px);
  background: var(--border);
}
.timeline-item::after {
  content: "";
  position: absolute;
  top: 5px;
  left: -33px;
  height: 6px;
  width: 6px;
  background: var(--text-color);
  border-radius: 50%;
  box-shadow: 0 0 0 4px var(--border);
}
.timeline-text {
  color: var(--light-gray);
  font-weight: var(--fw-300);
  line-height: 1.6;
}

/*-----------------------------------*\
  #RESPONSIVE
\*-----------------------------------*/
/* responsive larger than 768px screen */
@media (min-width: 768px) {
  :root {
    /* typography */
    --fs-1: 32px;
    --fs-2: 24px;
    --fs-3: 26px;
    --fs-4: 18px;
    --fs-6: 15px;
    --fs-7: 15px;
    --fs-8: 12px;
  }

  /* REUSED STYLE */

  .sidebar, article {
    width: 520px;
    margin-inline: auto;
    padding: 30px;
  }
  .article-title {
    font-weight: var(--fw-600);
    padding-bottom: 15px;
  }
  .article-title::after {
    width: 40px;
    height: 5px;
  }
  .icon-box {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    font-size: 18px;
  }

  /* MAIN */
  main {
    margin-inline: auto;
    display: flex;
    align-items: center;
    min-height: 100vh;
    justify-content: center;
  }
  .sidebar,
  article {
    border-radius: 20px;
  }

  /* SIDEBAR */
  .sidebar {
    max-height: 180px;
    margin-bottom: 30px;
  }
  .sidebar.active { max-height: 584px; }
  .sidebar-info { gap: 25px; }
  .avatar-box { border-radius: 30px; }
  .avatar-box img { width: 120px; }
  .info-content .name { margin-bottom: 15px; }
  .info-content .title { padding: 5px 18px; }
  .info_more-btn {
    top: -30px;
    right: -30px;
    padding: 10px 15px;
  }
  .info_more-btn span {
    display: block;
    font-size: var(--fs-8);
  }
  .info_more-btn ion-icon { display: none; }
  .separator { margin: 32px 0; }
  .contacts-list { gap: 20px; }
  .contact-info {
    max-width: calc(100% - 64px);
    width: calc(100% - 64px);
  }

  /* ABOUT */
  .about .article-title { margin-bottom: 20px; }
  .about-text { margin-bottom: 40px; }

  /* RESUME */
  .timeline-list { margin-left: 65px; }
  .timeline-item:not(:last-child)::before { left: -40px; }
  .timeline-item::after {
    height: 8px;
    width: 8px;
    left: -43px;
  }
  .skills-item:not(:last-child) { margin-bottom: 25px; }

  /* CONTACT */

  /* REUSED STYLE */
   .sidebar, article { width: 700px; }
   .has-scrollbar::-webkit-scrollbar-button { width: 100px; }

  /* SIDEBAR */
  .contacts-list {
    grid-template-columns: 1fr 1fr;
    gap: 30px 15px;
  }

  /* NAVBAR*/
  .navbar-link { --fs-8: 15px; }
}

/* responsive larger than 1024px screen */
@media (min-width: 1024px) {
  :root {
    --shadow-1: -4px 8px 24px hsla(0, 0%, 0%, 0.125);
    --shadow-2: 0 16px 30px hsla(0, 0%, 0%, 0.125);
    --shadow-3: 0 16px 40px hsla(0, 0%, 0%, 0.125);
  }

  /* REUSED STYLE */
  .sidebar, article {
    width: 950px;
    box-shadow: var(--shadow-5);
  }

  /* MAIN */
  main {
    display: flex;
    align-items: center;
    min-height: 100vh;
  }
  .main-content {
    position: relative;
    width: max-content;
    margin: auto;
  }

  /* NAVBAR */
  .navbar {
    position: absolute;
    bottom: auto;
    top: 0;
    left: auto;
    right: 0;
    width: max-content;
    border-radius: 0 20px;
    padding: 0 20px;
    box-shadow: none;
  }
  .navbar-list {
    gap: 30px;
    padding: 0 20px;
  }
  .navbar-link { font-weight: var(--fw-500); }

  /* PORTFOLIO */
  .project-list { grid-template-columns: repeat(3, 1fr); }

  /* BLOG */
  .blog-banner-box { height: 230px; }
}

/* responsive larger than 1250px screen */
@media (min-width: 1250px) {
  /* REUSED STYLE */
  .sidebar, article { width: auto; }
  article { min-height: 100%; }

  /* MAIN */
  main {
    margin-inline: auto;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    width: 100%;
    background: var(--bg-gradiend-backgroud);
    gap: 25px;
  }

  .main-content {
    max-width: 900px;
    min-width: 400px;
    width: 60%;
    margin: 0;
  }

  /* SIDEBAR */
  .sidebar {
    position: sticky;
    top: 60px;
    max-height: max-content;
    height: 100%;
    margin-bottom: 0;
    padding-top: 60px;
    z-index: 1;
  }
  .sidebar-info { flex-direction: column; }
  .avatar-box img { width: 150px; }
  .info-content .name {
    white-space: nowrap;
    text-align: center;
  }
  .info-content .title { margin: auto; }
  .info_more-btn { display: none; }
  .sidebar-info_more {
    opacity: 1;
    visibility: visible;
  }
  .contacts-list { grid-template-columns: 1fr; }
  .contact-info :is(.contact-link) {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .contact-info :is(.contact-link, time, address) {
    --fs-7: 14px;
    font-weight: var(--fw-300);
  }
  .separator:last-of-type {
    margin: 15px 0;
    opacity: 0;
  }
  .social-list { justify-content: center; }

  /* RESUME */
  .timeline-text { max-width: 700px; }

  .article {
    max-width: 800px;
    margin: 0 auto;
  }

}