@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600&display=swap');

:root {
    --bg-gradient-onyx: linear-gradient(to bottom right, hsl(240, 1%, 20%) 3%, hsl(0, 0%, 15%) 97%);
    --bg-gradient-jet: linear-gradient(to bottom right, hsla(240, 1%, 15%, .251) 3%, hsla(240, 2%, 10%, 0) 100%), hsl(240, 2%, 12%);
    --bg-gradient-grey: linear-gradient(to bottom right, hsl(240, 1%, 30%) 0%, hsl(240, 1%, 20%) 100%);
    --bg-gradient-muted-white: linear-gradient(to bottom right, hsl(0, 0%, 90%) 0%, hsl(0, 0%, 80%) 100%);
    --border-gradient-onyx: linear-gradient(to bottom right, hsl(0, 0%, 20%) 0%, hsla(0, 0%, 20%, 0) 50%);
    --text-gradient-teal: linear-gradient(to right, hsl(180, 50%, 50%), hsl(170, 50%, 45%));

    --jet: hsl(0, 0%, 18%);
    --onyx: hsl(240, 1%, 15%);
    --eerie-black1: hsl(240, 2%, 12%);
    --eerie-black2: hsl(240, 2%, 10%);
    --smoky-black: hsl(0, 0%, 5%);
    --white1: hsl(0, 0%, 95%);
    --white2: hsl(0, 0%, 90%);
    --teal: hsl(180, 50%, 50%);
    --dark-grey: hsl(240, 1%, 25%);
    --light-gray: hsl(0, 0%, 80%);
    --light-gray70: hsla(0, 0%, 80%, .7);
    --bittersweet-shimmer: hsl(0, 43%, 45%);

    --ff-poppins: 'Poppins', sans-serif;

    --fs1: 24px;
    --fs2: 18px;
    --fs3: 17px;
    --fs4: 16px;
    --fs5: 15px;
    --fs6: 14px;
    --fs7: 13px;
    --fs8: 12px;

    --fw300: 300;
    --fw400: 400;
    --fw500: 500;
    --fw600: 600;

    --shadow1: -4px 8px 24px hsla(0, 0%, 0%, .25);
    --shadow2: 0px 16px 30px hsla(0, 0%, 0%, .25);
    --shadow3: 0px 16px 40px hsla(0, 0%, 0%, .25);
    --shadow4: 0px 25px 50px hsla(0, 0%, 0%, .15);
    --shadow5: 0px 24px 80px hsla(0, 0%, 0%, .25);

    --transition1: .25s ease;
    --transition2: .5s ease-in-out;
}

*, *::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(--teal); color: var(--smoky-black); }
:focus { outline-color: var(--teal); }
html { font-family: var(--ff-poppins); }
body { background: var(--smoky-black); transition: background var(--transition1); }

/* Color Modes */
body.black-mode { background: var(--smoky-black); }
body.grey-mode { background: var(--dark-grey); }
body.white-mode { background: var(--white2); }

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

.sidebar, article {
    background: var(--eerie-black2);
    border: 1px solid var(--jet);
    border-radius: 20px;
    box-shadow: var(--shadow1);
    z-index: 1;
    padding: 15px;
}

.sidebar.active { max-height: 584px; }
.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(--teal);
    box-shadow: var(--shadow1);
    z-index: 1;
}
.icon-box::before {
    content: '';
    position: absolute;
    inset: 1px;
    background: var(--eerie-black1);
    border-radius: inherit;
    z-index: -1;
}
.icon-box ion-icon { --ionicon-stroke-width: 35px; }
article { display: none; }
article.active { display: block; animation: fade .5s ease backwards; }
@keyframes fade { 0% { opacity: 0; } 100% { opacity: 1; } }
.h2, .h3, .h4, .h5 { color: var(--white2); text-transform: capitalize; }
.h2 { font-size: var(--fs1); }
.h3 { font-size: var(--fs2); }
.h4 { font-size: var(--fs4); }
.h5 { font-size: var(--fs7); font-weight: var(--fw500); }
.article-title { position: relative; padding-bottom: 7px; }
.article-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 3px;
    background: var(--text-gradient-teal);
    border-radius: 3px;
}
.has-scrollbar::-webkit-scrollbar { width: 5px; height: 5px; }
.has-scrollbar::-webkit-scrollbar-track { background: var(--onyx); border-radius: 5px; }
.has-scrollbar::-webkit-scrollbar-thumb { background: var(--teal); 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(--shadow2);
    cursor: pointer;
    z-index: 1;
}
.content-card::before {
    content: '';
    position: absolute;
    inset: 1px;
    background: var(--bg-gradient-jet);
    border-radius: inherit;
    z-index: -1;
}

/* Sidebar */
.sidebar { margin-bottom: 15px; max-height: 112px; overflow: hidden; transition: var(--transition2); }
.sidebar-info { position: relative; display: flex; justify-content: flex-start; align-items: center; gap: 15px; }
.avatar-box { background: var(--bg-gradient-onyx); border-radius: 500px; }
.info-content .name { color: var(--white2); font-size: var(--fs3); font-weight: var(--fw500); letter-spacing: -0.25px; margin-bottom: 10px; }
.info-content .title { color: var(--white1); background: var(--onyx); font-size: var(--fs8); font-weight: var(--fw300); 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(--teal); background: var(--border-gradient-onyx); padding: 10px; box-shadow: var(--shadow2); transition: var(--transition1); z-index: 1; }
.info-more-btn::before { content: ''; position: absolute; inset: 1px; border-radius: inherit; background: var(--bg-gradient-jet); transition: var(--transition1); z-index: -1; }
.info-more-btn:hover, .info-more-btn:focus { background: var(--bg-gradient-grey); }
.info-more-btn span { display: none; }
.sidebar-info-more { opacity: 0; visibility: hidden; transition: var(--transition2); }
.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-info :is(.contact-link, time, address) { color: var(--white2); font-size: var(--fs7); }
.contact-info address { font-style: normal; }
.contact-title { color: var(--light-gray70); font-size: var(--fs8); text-transform: uppercase; margin-bottom: 2px; }
.social-list { display: flex; justify-content: flex-start; align-items: center; gap: 15px; padding-bottom: 4px; padding-left: 7px; }
.social-item .social-link { color: var(--light-gray70); font-size: 18px; }
.social-item .social-link:hover { color: var(--teal); }

/* Chatbot */
.chatbot { background: var(--eerie-black2); border: 1px solid var(--jet); border-radius: 10px; margin-top: 10px; max-height: 300px; overflow: hidden; }
.chatbot.hidden { display: none; }
.chatbot-header { background: var(--bg-gradient-onyx); padding: 10px; display: flex; justify-content: space-between; align-items: center; }
.chatbot-header h3 { color: var(--white2); font-size: var(--fs6); }
.chatbot-header ion-icon { color: var(--teal); cursor: pointer; font-size: 18px; }
.chatbot-body { padding: 10px; max-height: 200px; overflow-y: auto; }
.chatbot-body p { color: var(--light-gray); font-size: var(--fs7); }
.chatbot input { width: 100%; padding: 10px; border: none; background: var(--onyx); color: var(--white2); font-size: var(--fs7); }

/* Navbar */
.navbar { position: fixed; bottom: 0; left: 0; width: 100%; background: hsla(240, 1%, 15%, .75); backdrop-filter: blur(10px); border: 1px solid var(--jet); border-radius: 12px 12px 0 0; box-shadow: var(--shadow2); 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(--fs8); padding: 20px 7px; transition: color var(--transition1); }
.navbar-link:hover, .navbar-link:focus { color: var(--light-gray70); }
.navbar-link.active { color: var(--teal); }
.mode-toggle ion-icon { color: var(--teal); font-size: 18px; }

/* About */
.about .article-title { margin-bottom: 15px; margin-top: 15px; }
.about-text { color: var(--light-gray); font-size: var(--fs6); font-weight: var(--fw300); line-height: 1.6; }
.about-text p { margin-bottom: 15px; text-align: justify; padding: 0 10px; }
.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(--shadow2); 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(--fs6); font-weight: var(--fw300); line-height: 1.6; }

/* Resume */
.article-title { margin-bottom: 30px; }
.timeline { margin-bottom: 30px; }
.timeline .title-wrapper { display: flex; align-items: center; gap: 15px; margin-bottom: 25px; }
.timeline-list { font-size: var(--fs6); margin-left: 45px; }
.timeline-list span { color: var(--teal); font-weight: var(--fw400); line-height: 1.6; }
.timeline-item { position: relative; }
.timeline-item:not(:last-child) { margin-bottom: 20px; }
.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;
    border-radius: 50%;
    background: var(--text-gradient-teal);
    box-shadow: 0 0 0 4px var(--jet);
}
.timeline-item-title { font-size: var(--fs6); line-height: 1.3; margin-bottom: 7px; }
.timeline-text { color: var(--light-gray); font-weight: var(--fw300); line-height: 1.6; text-align: justify; }

/* Skills */
.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(--fs7); font-weight: var(--fw300); }
.skills-progress-bg { background: var(--jet); width: 100%; height: 8px; border-radius: 10px; }
.skills-progress-fill { background: var(--text-gradient-teal); height: 100%; border-radius: inherit; }

/* Portfolio */
.filter-list { display: none; }
.filter-select-box { position: relative; margin-bottom: 25px; }
.filter-select { background: var(--eerie-black2); color: var(--light-gray); display: flex; justify-content: space-between; align-items: center; width: 100%; padding: 12px 16px; border: 1px solid var(--jet); border-radius: 14px; font-size: var(--fs6); font-weight: var(--fw300); }
.filter-select.active .select-icon { transform: rotate(0.5turn); }
.select-list { background: var(--eerie-black2); position: absolute; top: calc(100% + 6px); width: 100%; padding: 6px; border: 1px solid var(--jet); border-radius: 14px; z-index: 2; visibility: hidden; pointer-events: none; transition: .5s ease-in-out; }
.filter-select.active + .select-list { opacity: 1; visibility: visible; pointer-events: all; }
.select-item button { background: var(--eerie-black2); color: var(--light-gray); font-size: var(--fs6); font-weight: var(--fw300); text-transform: capitalize; width: 100%; padding: 8px 10px; border-radius: 8px; }
.select-item button:hover { --eerie-black2: hsl(240, 2%, 20%); }
.project-list { display: grid; grid-template-columns: 1fr; gap: 30px; margin-bottom: 10px; }
.project-item { display: none; }
.project-item.active { display: block; animation: scaleUp .25s ease forwards; }
@keyframes scaleUp { 0% { transform: scale(0.5); } 100% { transform: scale(1); } }
.project-item > a { width: 100%; }
.project-img { position: relative; width: 100%; height: 200px; border-radius: 16px; overflow: hidden; margin-bottom: 15px; }
.project-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition1); }
.project-img::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: transparent; z-index: 1; transition: var(--transition1); }
.project-item > a:hover img { transform: scale(1.1); }
.project-item > a:hover .project-img::before { background: hsla(0, 0%, 0%, .5); }
.project-item-icon-box { --scale: .8; background: var(--jet); color: var(--teal); position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%) scale(var(--scale)); font-size: 20px; padding: 18px; border-radius: 12px; opacity: 0; z-index: 1; transition: var(--transition1); }
.project-item > a:hover .project-item-icon-box { --scale: 1; opacity: 1; }
.project-item-icon-box ion-icon { --ionicon-stroke-width: 50px; }
.project-title, .project-category { margin-left: 10px; }
.project-title { color: var(--white2); font-size: var(--fs5); font-weight: var(--fw400); text-transform: capitalize; line-height: 1.3; }
.project-category { color: var(--light-gray70); font-size: var(--fs6); font-weight: var(--fw300); }

/* Contact */
.mapbox { position: relative; height: 250px; width: 100%; border-radius: 16px; margin-bottom: 30px; border: 1px solid var(--jet); overflow: hidden; }
.mapbox figure { height: 100%; }
.mapbox iframe { width: 100%; height: 100%; border: none; filter: grayscale(1) invert(1); }
.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(--white2); font-size: var(--fs6); font-weight: var(--fw400); padding: 13px 20px; border: 1px solid var(--jet); border-radius: 14px; outline: none; }
.form-input::placeholder { font-weight: var(--fw500); }
.form-input:focus { border-color: var(--teal); }
.form-input:focus:invalid { border-color: var(--bittersweet-shimmer); }
textarea.form-input { min-height: 100px; height: 120px; max-height: 200px; resize: vertical; margin-bottom: 25px; }
textarea.form-input::-webkit-resizer { display: none; }
.form-btn { position: relative; width: 100%; background: var(--border-gradient-onyx); color: var(--teal); display: flex; justify-content: center; align-items: center; gap: 10px; padding: 13px 20px; border-radius: 14px; font-size: var(--fs6); text-transform: capitalize; box-shadow: var(--shadow3); z-index: 1; transition: var(--transition1); }
.form-btn::before { content: ''; position: absolute; inset: 1px; background: var(--bg-gradient-jet); border-radius: inherit; z-index: -1; transition: var(--transition1); }
.form-btn ion-icon { font-size: 16px; }
.form-btn:hover { background: var(--bg-gradient-grey); }
.form-btn:disabled { opacity: .7; cursor: not-allowed; }
.form-btn:disabled:hover { background: var(--border-gradient-onyx); }

/* Media Queries */
@media (min-width: 450px) {
    .project-img, .blog-banner-box { height: auto; }
}
@media (min-width: 580px) {
    :root { --fs1: 32px; --fs2: 24px; --fs3: 26px; --fs4: 18px; --fs6: 15px; --fs7: 15px; --fs8: 12px; }
    .sidebar, article { width: 520px; margin-inline: auto; padding: 30px; }
    .article-title { font-weight: var(--fw600); 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 10px; }
    .info-more-btn { top: -30px; right: -30px; padding: 10px 15px; }
    .info-more-btn span { display: block; font-size: var(--fs8); }
    .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 { --fs8: 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; }
    .mapbox { height: 380px; border-radius: 18px; }
    .input-wrapper { gap: 30px; margin-bottom: 30px; }
    .form-input { padding: 15px 20px; }
    textarea.form-input { margin-bottom: 30px; }
    .form-btn { --fs-6: 16px; padding: 16px 20px; }
    .form-btn ion-icon { font-size: 18px; }
}
@media (min-width: 768px) {
    .sidebar, article { width: 700px; }
    .has-scrollbar::-webkit-scrollbar-button { width: 100px; }
    .contacts-list { grid-template-columns: 1fr 1fr; gap: 30px 15px; }
    .navbar-link { --fs8: 15px; }
    .article-title { padding-bottom: 20px; }
    .filter-select-box { display: none; }
    .filter-list { display: flex; justify-content: flex-start; align-items: center; gap: 25px; padding-left: 5px; margin-bottom: 30px; }
    .filter-item button { color: var(--light-gray); font-size: var(--fs5); transition: var(--transition1); }
    .filter-item button:hover { color: var(--light-gray70); }
    .filter-item button.active { color: var(--teal); }
    .project-list { grid-template-columns: 1fr 1fr; }
    .input-wrapper { grid-template-columns: 1fr 1fr; }
    .form-btn { width: max-content; margin-left: auto; }
}
@media (min-width: 1024px) {
    :root { --shadow1: -4px 8px 24px hsla(0, 0%, 0%, .125); --shadow2: 0px 16px 30px hsla(0, 0%, 0%, .125); --shadow3: 0px 16px 40px hsla(0, 0%, 0%, .125); }
    .sidebar, article { width: 950px; box-shadow: var(--shadow5); }
    .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(--fw500); }
    .service-list { grid-template-columns: 1fr 1fr; gap: 20px 25px; }
    .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%, .1); border-radius: 20px; box-shadow: inset 1px 1px 0 hsla(0, 0%, 100%, .11), inset -1px -1px 0 hsla(0, 0%, 100%, .11); }
    body::-webkit-scrollbar-thumb:hover { background: hsla(0, 0%, 100%, .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) { --fs7: 14px; font-weight: var(--fw300); }
    .separator:last-of-type { margin: 15px 0; opacity: 0; }
    .social-list { justify-content: center; }
}