:root {
  /* Dark Navy/Black base inspired by reference image */
  --bg-main: hsl(230, 25%, 7%);
  --bg-card: hsl(228, 20%, 10%);
  --bg-card-2: hsl(228, 18%, 13%);
  --bg-gradient-onyx: linear-gradient(to bottom right, hsl(228, 20%, 18%) 3%, hsl(228, 20%, 12%) 97%);
  --bg-gradient-jet: linear-gradient(to bottom right, hsla(228, 20%, 15%, 0.251) 0%, hsla(228, 20%, 8%, 0) 100%), hsl(228, 20%, 11%);
  --bg-gradient-blue-1: linear-gradient(to bottom right, hsl(200, 100%, 55%) 0%, hsla(200, 100%, 55%, 0) 50%);
  --bg-gradient-blue-2: linear-gradient(135deg, hsla(200, 100%, 55%, 0.251) 0%, hsla(200, 100%, 55%, 0) 59.86%), hsl(228, 20%, 11%);
  --border-gradient-onyx: linear-gradient(to bottom right, hsl(228, 20%, 22%) 0%, hsla(228, 20%, 22%, 0) 50%);
  --text-gradient-blue: linear-gradient(to right, hsl(195, 100%, 60%), hsl(210, 100%, 65%));

  /* Accent colors - vibrant cyan/blue like reference */
  --accent: hsl(195, 100%, 55%);
  --accent-2: hsl(210, 100%, 65%);
  --accent-purple: hsl(265, 80%, 65%);
  --accent-orange: hsl(35, 100%, 60%);
  --accent-green: hsl(145, 70%, 50%);

  --jet: hsl(228, 15%, 20%);
  --onyx: hsl(228, 15%, 15%);
  --eerie-black-1: hsl(228, 20%, 11%);
  --eerie-black-2: hsl(228, 20%, 10%);
  --smoky-black: hsl(230, 25%, 5%);
  --white-1: hsl(0, 0%, 100%);
  --white-2: hsl(0, 0%, 95%);
  --light-gray: hsl(210, 15%, 75%);
  --light-gray-70: hsla(210, 15%, 75%, 0.7);
  --vegas-gold: hsl(195, 100%, 60%);
  --bittersweet-shimmer: hsl(0, 43%, 51%);

  --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%, 0.4);
  --shadow-2: 0 16px 30px hsla(0, 0%, 0%, 0.4);
  --shadow-3: 0 16px 40px hsla(0, 0%, 0%, 0.4);
  --shadow-4: 0 25px 50px hsla(0, 0%, 0%, 0.3);
  --shadow-5: 0 24px 80px hsla(0, 0%, 0%, 0.4);
  --shadow-blue: 0 0 20px hsla(195, 100%, 55%, 0.3);

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

/*--- REUSED ---*/
.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(--accent);
  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(--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; }
.article-title::after {
  content: "";
  position: absolute; bottom: 0; left: 0;
  width: 30px; height: 3px;
  background: var(--text-gradient-blue);
  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(--accent); 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-jet);
  border-radius: inherit; z-index: -1;
}

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

/*--- SIDEBAR ---*/
.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(--accent);
  background: hsla(195, 100%, 55%, 0.1);
  border: 1px solid hsla(195, 100%, 55%, 0.3);
  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(--accent);
  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-blue-1); }
.info_more-btn:hover::before, .info_more-btn:focus::before { background: var(--bg-gradient-blue-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; }

.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-gray-70); font-size: 18px; transition: var(--transition-1); }
.social-item .social-link:hover { color: var(--accent); }

/*--- NAVBAR ---*/
.navbar {
  position: fixed; bottom: 0; left: 0; width: 100%;
  background: hsla(228, 20%, 8%, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid var(--jet);
  border-top: 1px solid hsla(195, 100%, 55%, 0.2);
  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(--accent); }
.navbar-link.active { color: var(--accent); }

/*--- 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; }
.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);
  border: 1px solid hsla(195, 100%, 55%, 0.1);
  transition: border-color var(--transition-1), box-shadow var(--transition-1);
  z-index: 1;
}
.service-item:hover {
  border-color: hsla(195, 100%, 55%, 0.4);
  box-shadow: var(--shadow-blue);
}
.service-item::before {
  content: ""; position: absolute; inset: 1px;
  background: var(--bg-gradient-jet);
  border-radius: inherit; z-index: -1;
}
.service-icon-box { margin-bottom: 12px; }
.service-icon-box img { margin: auto; border-radius: 8px; }
.service-content-box { text-align: center; }
.service-item-title { margin-bottom: 7px; color: var(--accent); }
.service-item-text { color: var(--light-gray); font-size: var(--fs-6); font-weight: var(--fw-300); line-height: 1.6; }
.service-item-text strong { color: var(--accent-2); font-weight: var(--fw-500); }

/*--- 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(--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; color: var(--white-2); }
.timeline-list span { color: var(--accent); 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(--accent);
  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 GRID ---*/
.skills-title { margin-bottom: 20px; }
.skills-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }

.skill-category-card {
  background: var(--bg-gradient-jet);
  border: 1px solid hsla(195, 100%, 55%, 0.15);
  border-radius: 14px;
  padding: 18px 20px;
  transition: border-color var(--transition-1), box-shadow var(--transition-1);
}
.skill-category-card:hover {
  border-color: hsla(195, 100%, 55%, 0.4);
  box-shadow: 0 0 16px hsla(195, 100%, 55%, 0.12);
}

.skill-cat-title {
  display: flex; align-items: center; gap: 8px;
  font-size: var(--fs-6); font-weight: var(--fw-600);
  color: var(--accent);
  margin-bottom: 12px;
  text-transform: uppercase; letter-spacing: 0.5px;
}
.skill-cat-title ion-icon { font-size: 16px; }

.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }

.skill-tag {
  font-size: var(--fs-8); font-weight: var(--fw-500);
  padding: 4px 12px; border-radius: 20px;
  letter-spacing: 0.3px;
  transition: transform var(--transition-1), box-shadow var(--transition-1);
}
.skill-tag:hover { transform: translateY(-2px); }

.tag-blue {
  background: hsla(210, 100%, 60%, 0.15);
  border: 1px solid hsla(210, 100%, 60%, 0.4);
  color: hsl(210, 100%, 75%);
}
.tag-cyan {
  background: hsla(195, 100%, 55%, 0.12);
  border: 1px solid hsla(195, 100%, 55%, 0.4);
  color: hsl(195, 100%, 75%);
}
.tag-purple {
  background: hsla(265, 80%, 65%, 0.12);
  border: 1px solid hsla(265, 80%, 65%, 0.4);
  color: hsl(265, 80%, 80%);
}
.tag-orange {
  background: hsla(35, 100%, 60%, 0.12);
  border: 1px solid hsla(35, 100%, 60%, 0.4);
  color: hsl(35, 100%, 75%);
}
.tag-green {
  background: hsla(145, 70%, 50%, 0.12);
  border: 1px solid hsla(145, 70%, 50%, 0.4);
  color: hsl(145, 70%, 65%);
}

/*--- PROJECTS ---*/
.filter-list { display: none; }
.filter-select-box { position: relative; margin-bottom: 25px; }
.filter-select {
  background: var(--eerie-black-2); 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(--fs-6); font-weight: var(--fw-300);
}
.filter-select.active .select-icon { transform: rotate(0.5turn); }
.select-list {
  background: var(--eerie-black-2);
  position: absolute; top: calc(100% + 6px); width: 100%;
  padding: 6px; border: 1px solid var(--jet); border-radius: 14px;
  z-index: 2; opacity: 0; visibility: hidden; pointer-events: none;
  transition: 0.15s ease-in-out;
}
.filter-select.active + .select-list { opacity: 1; visibility: visible; pointer-events: all; }
.select-item button {
  background: var(--eerie-black-2); color: var(--light-gray);
  font-size: var(--fs-6); font-weight: var(--fw-300);
  text-transform: capitalize; width: 100%; padding: 8px 10px; border-radius: 8px;
}

.project-list { display: grid; grid-template-columns: 1fr; gap: 30px; margin-bottom: 10px; }
.project-item { display: none; }
.project-item.active { display: block; animation: scaleUp 0.25s 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;
  border: 1px solid hsla(195, 100%, 55%, 0.15);
  transition: border-color var(--transition-1);
}
.project-item > a:hover .project-img { border-color: hsla(195, 100%, 55%, 0.5); }
.project-img::before {
  content: ""; position: absolute; top: 0; left: 0;
  width: 100%; height: 100%;
  background: transparent; z-index: 1; transition: var(--transition-1);
}
.project-item > a:hover .project-img::before { background: hsla(0, 0%, 0%, 0.4); }

.project-item-icon-box {
  --scale: 0.8;
  background: var(--jet); color: var(--accent);
  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: 2; transition: var(--transition-1);
}
.project-item > a:hover .project-item-icon-box { --scale: 1; opacity: 1; }
.project-item-icon-box ion-icon { --ionicon-stroke-width: 50px; }

.project-placeholder {
  width: 100%; height: 100%;
  background: linear-gradient(135deg, hsl(228, 20%, 14%), hsl(228, 20%, 10%));
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px;
}
.project-placeholder ion-icon { font-size: 44px; color: var(--accent); }
.project-placeholder span { color: var(--light-gray); font-size: 13px; font-family: var(--ff-poppins); text-align: center; padding: 0 10px; }

.project-placeholder-2 { background: linear-gradient(135deg, hsl(210, 20%, 13%), hsl(210, 20%, 9%)); }
.project-placeholder-2 ion-icon { color: var(--accent-purple); }

.project-placeholder-3 { background: linear-gradient(135deg, hsl(240, 20%, 14%), hsl(240, 20%, 10%)); }
.project-placeholder-3 ion-icon { color: var(--accent-green); }

/* ── Developer Hub placeholder: dark base with gold accent icon ── */
.project-placeholder-4 {
  background: linear-gradient(135deg, hsl(228, 25%, 12%) 0%, hsl(40, 30%, 10%) 100%);
}
.project-placeholder-4 ion-icon { color: hsl(45, 100%, 60%); }

.project-title, .project-category { margin-left: 10px; }
.project-title { color: var(--white-2); font-size: var(--fs-5); font-weight: var(--fw-400); text-transform: capitalize; line-height: 1.3; }
.project-category { color: var(--accent); font-size: var(--fs-6); font-weight: var(--fw-300); }

/*--- PROJECT MODAL ---*/
.project-modal-overlay {
  position: fixed; inset: 0;
  background: hsla(230, 25%, 3%, 0.85);
  backdrop-filter: blur(8px);
  z-index: 100;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}
.project-modal-overlay.active { opacity: 1; visibility: visible; pointer-events: all; }

.project-modal-box {
  background: hsl(228, 22%, 10%);
  border: 1px solid var(--accent);
  box-shadow: 0 0 40px hsla(195, 100%, 55%, 0.25), 0 0 80px hsla(195, 100%, 55%, 0.1);
  border-radius: 18px;
  padding: 35px;
  max-width: 680px; width: 100%;
  max-height: 85vh; overflow-y: auto;
  position: relative;
  animation: modalIn 0.3s ease forwards;
}
@keyframes modalIn { from { transform: scale(0.9); opacity: 0; } to { transform: scale(1); opacity: 1; } }

.project-modal-box::-webkit-scrollbar { width: 5px; }
.project-modal-box::-webkit-scrollbar-track { background: var(--onyx); border-radius: 5px; }
.project-modal-box::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 5px; }

.project-modal-close {
  position: absolute; top: 15px; right: 15px;
  width: 34px; height: 34px;
  background: var(--jet);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--light-gray); font-size: 22px; line-height: 1;
  cursor: pointer;
  transition: background var(--transition-1), color var(--transition-1);
  border: 1px solid hsla(195, 100%, 55%, 0.2);
}
.project-modal-close:hover { background: var(--accent); color: var(--smoky-black); }

.project-modal-title {
  font-size: var(--fs-2); font-weight: var(--fw-600);
  color: var(--accent);
  margin-bottom: 6px;
  padding-right: 40px;
}
.project-modal-category {
  font-size: var(--fs-7); font-weight: var(--fw-400);
  color: var(--accent-purple);
  background: hsla(265, 80%, 65%, 0.1);
  border: 1px solid hsla(265, 80%, 65%, 0.3);
  display: inline-block;
  padding: 3px 12px; border-radius: 20px;
  margin-bottom: 20px;
}
.project-modal-body {
  color: var(--light-gray);
  font-size: var(--fs-6);
  font-weight: var(--fw-300);
  line-height: 1.8;
  white-space: pre-line;
}
.project-modal-body strong { color: var(--accent-2); font-weight: var(--fw-500); }
.modal-github-btn {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 20px;
  padding: 10px 22px;
  background: hsla(195, 100%, 55%, 0.1);
  border: 1px solid hsla(195, 100%, 55%, 0.4);
  border-radius: 10px;
  color: var(--accent);
  font-size: var(--fs-6); font-weight: var(--fw-500);
  font-family: var(--ff-poppins);
  transition: background var(--transition-1), box-shadow var(--transition-1);
  cursor: pointer;
}
.modal-github-btn:hover { background: hsla(195, 100%, 55%, 0.2); box-shadow: 0 0 12px hsla(195, 100%, 55%, 0.3); }

/*--- CONTACT ---*/
.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;
  background: hsla(228, 20%, 13%, 0.8);
  border: 1px solid hsla(195, 100%, 55%, 0.2);
  border-radius: 14px; outline: none;
  transition: border-color var(--transition-1), box-shadow var(--transition-1);
}
.form-input::placeholder { color: var(--light-gray-70); font-weight: var(--fw-400); }
.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 12px hsla(195, 100%, 55%, 0.2);
}
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: hsla(195, 100%, 55%, 0.1);
  color: var(--accent);
  display: flex; justify-content: center; align-items: center; gap: 10px;
  padding: 13px 20px; border-radius: 14px;
  font-size: var(--fs-6); text-transform: capitalize;
  border: 1px solid hsla(195, 100%, 55%, 0.3);
  box-shadow: var(--shadow-3); z-index: 1; transition: var(--transition-1);
}
.form-btn:hover { background: hsla(195, 100%, 55%, 0.2); box-shadow: 0 0 20px hsla(195, 100%, 55%, 0.25); border-color: var(--accent); }
.form-btn ion-icon { font-size: 16px; }
.form-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.form-btn:disabled:hover { background: hsla(195, 100%, 55%, 0.1); box-shadow: var(--shadow-3); }

/*--- RESPONSIVE ---*/
@media (min-width: 450px) { .project-img { height: auto; } }

@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: 490px; }
  .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; }
  .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; flex-shrink: 0; }
  .service-content-box { text-align: left; }
  .timeline-list { margin-left: 65px; }
  .timeline-item:not(:last-child)::before { left: -40px; }
  .timeline-item::after { height: 8px; width: 8px; left: -43px; }
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .project-img { border-radius: 16px; }
  .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; }
  .contacts-list { grid-template-columns: 1fr 1fr; gap: 30px 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(--fs-5); transition: var(--transition-1); }
  .filter-item button:hover { color: var(--accent); }
  .filter-item button.active { color: var(--accent); }
  .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 { --shadow-1: -4px 8px 24px hsla(0,0%,0%,0.2); --shadow-2: 0 16px 30px hsla(0,0%,0%,0.2); --shadow-3: 0 16px 40px hsla(0,0%,0%,0.2); }
  .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; border-top: none; border-right: none; border-left: 1px solid hsla(195,100%,55%,0.2); border-bottom: 1px solid hsla(195,100%,55%,0.2); }
  .navbar-list { gap: 30px; padding: 0 20px; }
  .navbar-link { font-weight: var(--fw-500); }
  .service-list { grid-template-columns: 1fr 1fr; gap: 20px 25px; }
  .project-list { grid-template-columns: repeat(3, 1fr); }
  .skills-grid { grid-template-columns: 1fr 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; }
  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; }
  .timeline-text { max-width: 700px; }
}

/*--- CERTIFICATIONS ---*/
.cert-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.cert-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg-gradient-jet);
  border: 1px solid hsla(195, 100%, 55%, 0.15);
  border-radius: 16px;
  padding: 20px;
  transition: border-color var(--transition-1), box-shadow var(--transition-1), transform var(--transition-1);
}
.cert-card:hover {
  border-color: hsla(195, 100%, 55%, 0.45);
  box-shadow: 0 0 20px hsla(195, 100%, 55%, 0.15);
  transform: translateY(-3px);
}

.cert-badge-box {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  border-radius: 12px;
  overflow: visible;
  background: hsl(228, 20%, 14%);
  border: 1px solid hsla(195, 100%, 55%, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  position: relative;
  transition: border-color var(--transition-1), box-shadow var(--transition-1);
  z-index: 1;
}
.cert-badge-box img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 8px;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.35s ease;
  transform-origin: center center;
  cursor: zoom-in;
  position: relative;
  z-index: 2;
}
.cert-badge-box:hover {
  border-color: var(--accent);
  box-shadow: 0 0 18px hsla(195, 100%, 55%, 0.5);
  overflow: visible;
}
.cert-badge-box:hover img {
  transform: scale(2.5);
  box-shadow:
    0 0 0 3px var(--accent),
    0 0 25px hsla(195, 100%, 55%, 0.6),
    0 8px 30px hsla(0, 0%, 0%, 0.6);
  border-radius: 10px;
  cursor: zoom-in;
}

.cert-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cert-title {
  font-size: var(--fs-6);
  font-weight: var(--fw-600);
  color: var(--white-2);
  line-height: 1.4;
  text-transform: none;
}

.cert-issuer, .cert-date {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-7);
  font-weight: var(--fw-300);
  color: var(--light-gray-70);
}
.cert-issuer ion-icon, .cert-date ion-icon {
  font-size: 13px;
  color: var(--accent);
  flex-shrink: 0;
}

.cert-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
  font-size: var(--fs-8);
  font-weight: var(--fw-500);
  color: var(--accent);
  background: hsla(195, 100%, 55%, 0.08);
  border: 1px solid hsla(195, 100%, 55%, 0.3);
  padding: 4px 12px;
  border-radius: 20px;
  width: fit-content;
  transition: background var(--transition-1), box-shadow var(--transition-1);
  font-family: var(--ff-poppins);
  cursor: pointer;
}
.cert-link:hover {
  background: hsla(195, 100%, 55%, 0.18);
  box-shadow: 0 0 10px hsla(195, 100%, 55%, 0.2);
}
.cert-link ion-icon { font-size: 13px; }

.cert-link-disabled {
  color: var(--light-gray-70);
  background: hsla(0, 0%, 50%, 0.08);
  border-color: hsla(0, 0%, 50%, 0.2);
  cursor: default;
}
.cert-link-disabled:hover {
  background: hsla(0, 0%, 50%, 0.08);
  box-shadow: none;
}

@media (min-width: 580px) {
  .cert-badge-box { width: 95px; height: 95px; }
  .cert-title { font-size: var(--fs-5); }
}

@media (min-width: 768px) {
  .cert-list { grid-template-columns: 1fr 1fr; }
  .cert-card { flex-direction: column; align-items: flex-start; }
  .cert-badge-box { width: 80px; height: 80px; }
}

@media (min-width: 1024px) {
  .cert-list { grid-template-columns: 1fr 1fr 1fr; }
}

/*--- CERTIFICATE LIGHTBOX ---*/
.cert-img-clickable { cursor: zoom-in; }

.cert-lightbox {
  position: fixed; inset: 0;
  z-index: 200;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}
.cert-lightbox.active { opacity: 1; visibility: visible; pointer-events: all; }

.cert-lightbox-overlay {
  position: absolute; inset: 0;
  background: hsla(230, 25%, 3%, 0.92);
  backdrop-filter: blur(10px);
}
.cert-lightbox-content {
  position: relative; z-index: 1;
  max-width: 90vw; max-height: 90vh;
  display: flex; align-items: center; justify-content: center;
  animation: lightboxIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}
@keyframes lightboxIn {
  from { transform: scale(0.7); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.cert-lightbox-content img {
  max-width: 90vw; max-height: 85vh;
  border-radius: 14px;
  border: 2px solid var(--accent);
  box-shadow:
    0 0 0 4px hsla(195, 100%, 55%, 0.2),
    0 0 50px hsla(195, 100%, 55%, 0.4),
    0 20px 60px hsla(0, 0%, 0%, 0.7);
  object-fit: contain;
}

.cert-lightbox-close {
  position: absolute; top: -16px; right: -16px;
  width: 36px; height: 36px;
  background: var(--accent);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--smoky-black);
  font-size: 22px; line-height: 1;
  font-weight: var(--fw-600);
  cursor: pointer; z-index: 2;
  border: none;
  box-shadow: 0 0 15px hsla(195, 100%, 55%, 0.5);
  transition: transform var(--transition-1), background var(--transition-1);
}
.cert-lightbox-close:hover { transform: scale(1.15); background: hsl(195, 100%, 65%); }