:root {
  --bg-gradient-onyx: linear-gradient(to bottom right, hsl(240, 1%, 25%) 3%, hsl(0, 0%, 19%) 97%);
  --bg-gradient-jet: linear-gradient(to bottom right, hsla(240, 1%, 18%, 0.251) 0%, hsla(240, 2%, 11%, 0) 100%), hsl(240, 2%, 13%);
  --bg-gradient-yellow-1: linear-gradient(to bottom right, hsl(140, 100%, 51%) 0%, hsl(140, 100%, 30%) 50%);
  --bg-gradient-yellow-2: linear-gradient(135deg, hsla(45, 100%, 71%, 0.251) 0%, hsla(35, 100%, 68%, 0) 59.86%), hsl(240, 2%, 13%);
  --border-gradient-onyx: linear-gradient(to bottom right, hsl(0, 0%, 25%) 0%, hsla(0, 0%, 25%, 0) 50%);
  --text-gradient-yellow: linear-gradient(to right, hsl(140, 100%, 51%), hsl(140, 100%, 68%));

  --jet: hsl(0, 2%, 53%);
  --onyx: hsl(240, 1%, 17%);
  --eerie-black-1: hsl(240, 2%, 13%);
  --eerie-black-2: hsl(240, 2%, 12%);
  --smoky-black: hsl(0, 0%, 7%);
  --white-1: hsl(0, 0%, 100%);
  --white-2: hsl(0, 0%, 98%);
  --orange-yellow-crayola: hsl(140, 74%, 64%);
  --vegas-gold: hsla(140, 51%, 58%, 0.822);
  --light-gray: hsl(0, 0%, 84%);
  --light-gray-70: hsla(0, 0%, 84%, 0.7);
  --bittersweet-shimmer: hsl(0, 71%, 63%);
  --ff-poppins: 'Poppins', sans-serif;
  --fs-1: 24px;
  --fs-2: 18px;
  --fs-3: 17px;
  --fs-4: 16px;
  --fs-5: 15px;
  --fs-6: 14px;
  --fs-7: 13px;
  --fs-8: 11px;
  --fw-300: 300;
  --fw-400: 400;
  --fw-500: 500;
  --fw-600: 600;
  --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-1: 0.25s ease;
  --transition-2: 0.5s ease-in-out;
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

a { text-decoration: none; }
li { list-style: none; }
img, button { display: block; }
button { font: inherit; background: none; border: none; cursor: pointer; }
input, textarea { display: block; width: 100%; background: none; font: inherit; }

::selection { background: var(--orange-yellow-crayola); color: var(--smoky-black); }
:focus { outline-color: var(--orange-yellow-crayola); }
html { font-family: var(--ff-poppins); }
body { background: var(--smoky-black); }

.sidebar, article {
  background: var(--eerie-black-2);
  border: 1px solid var(--jet);
  border-radius: 20px;
  padding: 15px;
  box-shadow: var(--shadow-1);
  z-index: 1;
}

.separator { width: 100%; height: 1px; background: var(--jet); 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(--orange-yellow-crayola); 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; }
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(--white-2); 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; margin-bottom: 30px; }
.article-title::after { content: ""; position: absolute; bottom: 0; left: 0; width: 30px; height: 3px; background: var(--text-gradient-yellow); border-radius: 3px; }

.clients { margin-bottom: 15px; }
.clients-list { display: flex; justify-content: flex-start; align-items: flex-start; gap: 50px; margin: 0 -30px; padding: 45px; padding-bottom: 25px; overflow-x: auto; scroll-behavior: smooth; overscroll-behavior-inline: contain; scroll-snap-type: inline mandatory; scroll-padding-inline: 45px; }
.clients-item { min-width: calc(33.33% - 35px); scroll-snap-align: start; }
.clients-item img { width: 100%; filter: grayscale(1); transition: var(--transition-1); }
.clients-item img:hover { filter: grayscale(0); }

.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-jet); border-radius: inherit; z-index: -1; }

main { margin: 15px 12px; margin-bottom: 75px; min-width: 259px; }

.sidebar { margin-bottom: 15px; max-height: 112px; overflow: hidden; transition: var(--transition-2); }
.sidebar.active { max-height: 405px; }
.sidebar-info { position: relative; display: flex; justify-content: flex-start; align-items: center; gap: 15px; }
.avatar-box { background: var(--bg-gradient-onyx); border-radius: 20px; }
.info-content .name { color: var(--white-2); font-size: var(--fs-3); font-weight: var(--fw-500); letter-spacing: -0.25px; margin-bottom: 10px; }
.info-content .title { color: var(--white-1); background: var(--onyx); font-size: var(--fs-8); font-weight: var(--fw-300); width: max-content; padding: 3px 12px; border-radius: 8px; }
.info_more-btn { position: absolute; top: -15px; right: -15px; border-radius: 0 15px; font-size: 13px; color: var(--orange-yellow-crayola); background: var(--border-gradient-onyx); padding: 10px; box-shadow: var(--shadow-2); transition: var(--transition-1); z-index: 1; }
.info_more-btn::before { content: ""; position: absolute; inset: 1px; border-radius: inherit; background: var(--bg-gradient-jet); transition: var(--transition-1); z-index: -1; }
.info_more-btn:hover, .info_more-btn:focus { background: var(--bg-gradient-yellow-1); }
.info_more-btn:hover::before, .info_more-btn:focus::before { background: var(--bg-gradient-yellow-2); }
.info_more-btn span { display: none; }
.sidebar-info_more { opacity: 0; visibility: hidden; transition: var(--transition-2); }
.sidebar.active .sidebar-info_more { opacity: 1; visibility: visible; }
.contacts-list { display: grid; grid-template-columns: 1fr; gap: 16px; }
.contact-item { min-width: 100%; display: flex; align-items: center; gap: 16px; }
.contact-info { max-width: calc(100% - 46px); width: calc(100% - 46px); }
.contact-title { color: var(--light-gray-70); font-size: var(--fs-8); text-transform: uppercase; margin-bottom: 2px; }
.contact-info :is(.contact-link, time, address) { color: var(--white-2); font-size: var(--fs-7); }
.contact-info address { font-style: normal; }

.navbar { position: fixed; bottom: 0; left: 0; width: 100%; background: hsla(240, 1%, 17%, 0.75); backdrop-filter: blur(10px); border: 1px solid var(--jet); border-radius: 12px 12px 0 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(--orange-yellow-crayola); }

.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; }
.about-text p { margin-bottom: 15px; }

.service { margin-bottom: 35px; }
.service-title { margin-bottom: 20px; }
.service-list { display: grid; grid-template-columns: 1fr; gap: 20px; }
.service-item { position: relative; background: var(--border-gradient-onyx); padding: 20px; border-radius: 14px; box-shadow: var(--shadow-2); z-index: 1; }
.service-item::before { content: ""; position: absolute; inset: 1px; background: var(--bg-gradient-jet); border-radius: inherit; z-index: -1; }
.service-icon-box { margin-bottom: 10px; }
.service-icon-box img { margin: auto; }
.service-content-box { text-align: center; }
.service-item-title { margin-bottom: 7px; }
.service-item-text { color: var(--light-gray); font-size: var(--fs-6); font-weight: var(--fw-300); line-height: 1.6; }

.projects { margin-bottom: 15px; }
.projects-list { display: flex; justify-content: flex-start; align-items: flex-start; gap: 15px; margin: 0 -15px; padding: 25px; padding-bottom: 25px; overflow-x: auto; scroll-behavior: smooth; overscroll-behavior-inline: contain; scroll-snap-type: inline mandatory; scroll-padding-inline: 25px; }
.projects-item { min-width: 50%; scroll-snap-align: start; }
.projects-item img { width: 100%; filter: grayscale(1); transition: var(--transition-1); }
.projects-item img:hover { filter: grayscale(0); }

.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(--vegas-gold); 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(--jet); }
.timeline-item::after { content: ""; position: absolute; top: 5px; left: -33px; height: 6px; width: 6px; background: var(--text-gradient-yellow); border-radius: 50%; box-shadow: 0 0 0 4px var(--jet); }
.timeline-text { color: var(--light-gray); font-weight: var(--fw-300); line-height: 1.6; }

.skills-title { margin-bottom: 20px; }
.skills-list { padding: 20px; }
.skills-item:not(:last-child) { margin-bottom: 15px; }
.skill .title-wrapper { display: flex; align-items: center; gap: 5px; margin-bottom: 8px; }
.skill .title-wrapper data { color: var(--light-gray); font-size: var(--fs-7); font-weight: var(--fw-300); }
.skill-progress-bg { background: var(--jet); width: 100%; height: 8px; border-radius: 10px; }
.skill-progress-fill { background: var(--text-gradient-yellow); height: 100%; border-radius: inherit; }

.contact-form { margin-bottom: 10px; }
.form-title { margin-bottom: 20px; }
.input-wrapper { display: grid; grid-template-columns: 1fr; gap: 25px; margin-bottom: 25px; }
.form-input { color: var(--white-2); font-size: var(--fs-6); font-weight: var(--fw-400); padding: 13px 20px; border: 1px solid var(--jet); border-radius: 14px; outline: none; }
.form-input::placeholder { font-weight: var(--fw-500); }
.form-input:focus { border-color: var(--orange-yellow-crayola); }
input.form-input { margin-bottom: 25px; }
textarea.form-input { min-height: 100px; height: 120px; max-height: 200px; resize: vertical; margin-bottom: 25px; }
textarea.form-input::-webkit-resizer { display: none; }
.form-input:focus:invalid { border-color: var(--bittersweet-shimmer); }
.form-btn { position: relative; width: 100%; background: var(--border-gradient-onyx); color: var(--orange-yellow-crayola); display: flex; justify-content: center; align-items: center; gap: 10px; padding: 13px 20px; border-radius: 14px; font-size: var(--fs-6); text-transform: capitalize; box-shadow: var(--shadow-3); z-index: 1; transition: var(--transition-1); }
.form-btn::before { content: ""; position: absolute; inset: 1px; background: var(--bg-gradient-jet); border-radius: inherit; z-index: -1; transition: var(--transition-1); }
.form-btn:hover { background: var(--bg-gradient-yellow-1); }
.form-btn:hover::before { background: var(--bg-gradient-yellow-2); }
.form-btn:disabled { opacity: 0.7; cursor: not-allowed; }
.form-btn:disabled:hover { background: var(--border-gradient-onyx); }
.form-btn:disabled:hover::before { background: var(--bg-gradient-jet); }

@media (min-width: 450px) {
  .clients-item { min-width: calc(33.33% - 10px); }
  .projects-item { min-width: calc(33.33% - 10px); }
}
@media (min-width: 580px) {
  :root { --fs-1: 32px; --fs-2: 24px; --fs-3: 26px; --fs-4: 18px; --fs-6: 15px; --fs-7: 15px; --fs-8: 12px; }
  .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 { margin-top: 60px; margin-bottom: 100px; }
  .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); }
  .navbar { border-radius: 20px 20px 0 0; }
  .navbar-list { gap: 20px; }
  .navbar-link { --fs-8: 14px; }
  .about .article-title { margin-bottom: 20px; }
  .about-text { margin-bottom: 40px; }
  .service-item { display: flex; justify-content: flex-start; align-items: flex-start; gap: 18px; padding: 30px; }
  .service-icon-box { margin-bottom: 0; margin-top: 5px; }
  .service-content-box { text-align: left; }
}
@media (min-width: 768px) {
  .sidebar, article { width: 700px; }
  .contacts-list { grid-template-columns: 1fr 1fr; gap: 30px 15px; }
  .navbar-link { --fs-8: 15px; }
  .input-wrapper { grid-template-columns: 1fr 1fr; }
  .form-btn { width: max-content; margin-left: auto; }
}
@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); }
  .sidebar, article { width: 950px; box-shadow: var(--shadow-5); }
  main { margin-bottom: 60px; }
  .main-content { position: relative; width: max-content; margin: auto; }
  .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); }
  .service-list { grid-template-columns: 1fr 1fr; gap: 20px 25px; }
  .clients-item { min-width: calc(25% - 38px); }
  .projects-item { min-width: calc(25% - 38px); }
  .project-list { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1250px) {
  body::-webkit-scrollbar { width: 20px; }
  body::-webkit-scrollbar-track { background: var(--smoky-black); }
  body::-webkit-scrollbar-thumb { border: 5px solid var(--smoky-black); background: hsla(0, 0%, 100%, 0.1); border-radius: 20px; box-shadow: inset 1px 1px 0 hsla(0, 0%, 100%, 0.11), inset -1px -1px 0 hsla(0, 0%, 100%, 0.11); }
  body::-webkit-scrollbar-thumb:hover { background: hsla(0, 0%, 100%, 0.15); }
  body::-webkit-scrollbar-button { height: 60px; }
  .sidebar, article { width: auto; }
  article { min-height: 100%; }
  main { max-width: 1200px; margin-inline: auto; display: flex; justify-content: center; align-items: stretch; gap: 25px; }
  .main-content { min-width: 75%; width: 75%; margin: 0; }
  .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; }
}

@font-face { font-family: Lalezar; src: url(fonts/lalezar.ttf); }
@font-face { font-family: Vazir; src: url(fonts/Vazirmatn-Bold.ttf); }
.font-lalezar { font-family: Lalezar, serif; }
.font-vazir { font-family: Vazir, serif; }