:root {
  --bg: #06111f;
  --bg-soft: #0b1a2d;
  --panel: rgba(12, 28, 49, .78);
  --panel-strong: rgba(16, 37, 64, .95);
  --line: rgba(139, 176, 205, .18);
  --text: #e7eef8;
  --muted: #9db0c8;
  --quiet: #6f849d;
  --cyan: #58f0d0;
  --blue: #4cb5ff;
  --shadow: 0 24px 80px rgba(0, 0, 0, .35);
  --radius: 8px;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 10%, rgba(76, 181, 255, .16), transparent 30rem),
    radial-gradient(circle at 86% 14%, rgba(88, 240, 208, .13), transparent 28rem),
    linear-gradient(180deg, #06111f 0%, #081521 45%, #050c16 100%);
  line-height: 1.6;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -3;
  pointer-events: none;
  opacity: .19;
  background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(180deg, black, transparent 84%);
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font: inherit; }
.container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
.mono { font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; }
.skip-link { position: fixed; left: 1rem; top: -4rem; z-index: 999; padding: .75rem 1rem; background: var(--cyan); color: #05111d; border-radius: var(--radius); font-weight: 800; }
.skip-link:focus { top: 1rem; }
#neural-field { position: fixed; inset: 0; z-index: -2; pointer-events: none; opacity: .5; }

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
  padding: 18px 0;
  transition: background .25s ease, border-color .25s ease, padding .25s ease;
}
.site-header.is-scrolled {
  background: rgba(5, 13, 24, .86);
  border-color: var(--line);
  backdrop-filter: blur(18px);
  padding: 11px 0;
}
.nav { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand {
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  color: #05111d;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  border-radius: 50%;
  font-weight: 900;
  box-shadow: 0 0 32px rgba(88, 240, 208, .18);
}
.nav-links { display: flex; align-items: center; gap: 22px; color: var(--muted); font-size: .92rem; }
.nav-links a { position: relative; padding: 8px 0; }
.nav-resume {
  min-height: 34px;
  padding: .35rem .68rem;
  border: 1px solid rgba(88, 240, 208, .35);
  border-radius: var(--radius);
  color: var(--cyan);
  background: rgba(88, 240, 208, .07);
  cursor: pointer;
  font: inherit;
}
.nav-resume:hover, .nav-resume:focus-visible { border-color: var(--cyan); background: rgba(88, 240, 208, .13); color: var(--text); }
.nav-links a::after { content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px; background: linear-gradient(90deg, var(--cyan), var(--blue)); transition: width .25s ease; }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--text); }
.nav-links a:hover::after, .nav-links a:focus-visible::after { width: 100%; }
.menu-button { display: none; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,.04); color: var(--text); }
.menu-button span { display: block; width: 18px; height: 2px; margin: 4px auto; background: currentColor; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  min-height: 44px;
  padding: .78rem 1rem;
  border-radius: var(--radius);
  border: 1px solid rgba(88, 240, 208, .42);
  color: var(--cyan);
  background: rgba(88, 240, 208, .07);
  font-weight: 800;
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
  cursor: pointer;
}
.btn:hover, .btn:focus-visible { transform: translateY(-2px); border-color: var(--cyan); background: rgba(88, 240, 208, .13); }
.btn.primary { color: #06111f; background: linear-gradient(135deg, var(--cyan), var(--blue)); border: 0; box-shadow: 0 16px 44px rgba(76, 181, 255, .18); }

main { padding-top: 86px; }
section { scroll-margin-top: 92px; }
.hero { min-height: calc(100vh - 86px); display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(300px, .7fr); align-items: center; gap: 52px; padding: 54px 0 38px; }
.eyebrow { display: inline-flex; align-items: center; gap: .6rem; margin: 0 0 18px; color: var(--cyan); font-weight: 800; letter-spacing: .04em; }
.eyebrow::before { content: ""; width: 36px; height: 2px; background: var(--cyan); }
h1, h2, h3, h4 { line-height: 1.08; margin: 0; letter-spacing: 0; }
h1 { max-width: 880px; font-size: clamp(3rem, 7vw, 6.8rem); }
.gradient-text { color: transparent; background: linear-gradient(135deg, #ffffff, var(--cyan) 42%, var(--blue)); -webkit-background-clip: text; background-clip: text; }
.hero-subtitle { margin: 20px 0 0; max-width: 780px; color: var(--muted); font-size: clamp(1.18rem, 2.2vw, 1.75rem); font-weight: 700; }
.hero-copy { max-width: 760px; margin: 24px 0 0; color: var(--muted); font-size: 1.05rem; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.social-row { display: flex; align-items: center; gap: 10px; }
.icon-link {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.025));
  transition: transform .2s ease, color .2s ease, border-color .2s ease;
}
.icon-link:hover, .icon-link:focus-visible { color: var(--cyan); border-color: rgba(88, 240, 208, .45); transform: translateY(-2px); }
.icon-link svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.icon-link[aria-label="Kaggle profile"] svg { fill: currentColor; stroke: none; }

.profile-card { position: relative; padding: 14px; border: 1px solid rgba(88,240,208,.24); border-radius: 18px; background: linear-gradient(145deg, rgba(255,255,255,.08), rgba(76,181,255,.045)); box-shadow: var(--shadow); overflow: hidden; }
.profile-card::before { content: ""; position: absolute; inset: -35%; background: conic-gradient(from 180deg, transparent, rgba(88,240,208,.32), transparent 34%, rgba(76,181,255,.28), transparent 72%); opacity: .55; animation: spin 12s linear infinite; }
.profile-card::after {
  content: "";
  position: absolute;
  inset: 14px;
  border: 1px solid rgba(255,255,255,.09);
  border-radius: 12px;
  pointer-events: none;
  z-index: 2;
}
.profile-inner { position: relative; z-index: 1; overflow: hidden; border-radius: var(--radius); background: var(--bg-soft); }
.profile-inner img { width: 100%; aspect-ratio: 1 / 1.12; object-fit: cover; object-position: center 18%; filter: saturate(1.05) contrast(1.03); }
.profile-badge { position: absolute; z-index: 3; left: 24px; right: 24px; bottom: 24px; padding: 14px; border: 1px solid rgba(255,255,255,.16); border-radius: 10px; background: rgba(5, 13, 24, .8); backdrop-filter: blur(14px); }
.profile-badge strong, .profile-badge span { display: block; }
.profile-badge span { color: var(--muted); font-size: .9rem; }
.profile-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.profile-tags em { padding: .25rem .48rem; border: 1px solid rgba(88,240,208,.2); border-radius: 999px; color: var(--cyan); background: rgba(88,240,208,.07); font-size: .72rem; font-style: normal; font-weight: 800; }
@keyframes spin { to { transform: rotate(1turn); } }

.direction-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 20px auto 0; padding-bottom: 24px; }
.direction-card {
  position: relative;
  min-height: 138px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.045), rgba(255,255,255,.02));
  overflow: hidden;
}
.direction-card::after {
  content: "";
  position: absolute;
  right: -42px;
  bottom: -58px;
  width: 130px;
  height: 130px;
  border: 1px solid rgba(88,240,208,.14);
  border-radius: 50%;
}
.direction-code {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--cyan);
  font-size: .78rem;
  font-weight: 900;
  letter-spacing: .12em;
}
.direction-card strong { display: block; color: var(--text); font-size: 1.05rem; line-height: 1.2; }
.direction-card p { position: relative; z-index: 1; margin: 10px 0 0; color: var(--muted); font-size: .92rem; line-height: 1.55; }
.section-block { padding: 78px 0; }
.section-head { display: grid; grid-template-columns: minmax(0, .75fr) minmax(0, 1fr); gap: 42px; align-items: end; margin-bottom: 30px; }
.section-kicker { margin: 0 0 12px; color: var(--cyan); font-weight: 900; }
.section-title { font-size: clamp(2rem, 4.8vw, 4.1rem); }
.section-intro { color: var(--muted); margin: 0; font-size: 1.03rem; }
.panel { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); box-shadow: var(--shadow); }
.about-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(300px, .65fr); gap: 20px; }
.about-copy { padding: 30px; }
.about-copy p { margin: 0 0 18px; color: var(--muted); }
.about-copy p:last-child { margin-bottom: 0; }
.identity-list { display: grid; gap: 1px; background: var(--line); overflow: hidden; }
.identity-list div { display: grid; gap: 5px; padding: 18px; background: rgba(8, 22, 38, .94); }
.identity-list b { color: var(--text); }
.identity-list span { color: var(--muted); }
.focus-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 22px; }
.focus-card { position: relative; min-height: 180px; padding: 20px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,.035); }
.focus-card::after { content: ""; position: absolute; width: 140px; height: 140px; right: -70px; top: -70px; border: 1px solid rgba(88,240,208,.2); border-radius: 50%; }
.focus-card > span { display: inline-grid; place-items: center; width: 42px; height: 42px; margin-bottom: 18px; border-radius: var(--radius); color: #06111f; background: linear-gradient(135deg, var(--cyan), var(--blue)); }
.focus-card svg {
  width: 23px;
  height: 23px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.focus-card h3 { font-size: 1.08rem; margin-bottom: 9px; }
.focus-card p { margin: 0; color: var(--muted); font-size: .94rem; }

.timeline-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.timeline-column { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,.03); }
.timeline-column > h3 { margin-bottom: 22px; font-size: 1.35rem; }
.timeline { position: relative; display: grid; gap: 18px; }
.timeline::before { content: ""; position: absolute; top: 10px; bottom: 10px; left: 11px; width: 1px; background: linear-gradient(var(--cyan), rgba(76,181,255,.15)); }
.timeline-item { position: relative; padding-left: 36px; }
.timeline-item::before { content: ""; position: absolute; top: 7px; left: 5px; width: 13px; height: 13px; border-radius: 50%; background: var(--bg); border: 2px solid var(--cyan); box-shadow: 0 0 0 5px rgba(88,240,208,.08); }
.timeline-card { padding: 18px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(8, 22, 38, .78); transition: transform .2s ease, border-color .2s ease; }
.timeline-card:hover { transform: translateY(-3px); border-color: rgba(88,240,208,.38); }
.timeline-card h4 { font-size: 1.05rem; }
.org { margin: 5px 0; color: var(--blue); font-weight: 800; }
.inline-external, .org-link, .timeline-link {
  position: relative;
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-color: rgba(88,240,208,.45);
  text-underline-offset: 4px;
  transition: color .2s ease, text-decoration-color .2s ease;
}
.inline-external::after, .org-link::after, .timeline-link::after {
  content: "opens site";
  display: inline-flex;
  margin-left: .45rem;
  padding: .12rem .36rem;
  border: 1px solid rgba(88,240,208,.28);
  border-radius: 999px;
  color: var(--cyan);
  background: rgba(88,240,208,.07);
  font-size: .66rem;
  font-weight: 900;
  line-height: 1.2;
  vertical-align: middle;
}
.timeline-link[href*="whatsapp"]::after { content: "opens WhatsApp"; }
.inline-external[href*="mvp.microsoft.com"]::after, .org-link[href*="mvp.microsoft.com"]::after { content: "opens profile"; }
.inline-external[href*="msc-nmu.dev"]::after, .org-link[href*="msc-nmu.dev"]::after { content: "opens club site"; }
.inline-external:hover, .inline-external:focus-visible,
.org-link:hover, .org-link:focus-visible,
.timeline-link:hover, .timeline-link:focus-visible {
  color: var(--text);
  text-decoration-color: var(--cyan);
}
.date { color: var(--quiet); font-size: .88rem; }
.timeline-card ul { margin: 14px 0 0; padding: 0; list-style: none; color: var(--muted); font-size: .93rem; }
.timeline-card li { position: relative; padding-left: 18px; margin-top: 8px; }
.timeline-card li::before { content: ""; position: absolute; left: 0; top: .72em; width: 7px; height: 2px; background: var(--cyan); }

.skill-matrix, .projects-grid, .cert-grid { display: grid; gap: 14px; }
.skill-matrix { grid-template-columns: repeat(4, 1fr); }
.skill-card { padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,.035); }
.skill-card h3 { font-size: 1.08rem; margin-bottom: 16px; }
.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-tags span, .project-card div span {
  display: inline-flex;
  align-items: center;
  min-height: 31px;
  padding: .38rem .58rem;
  border: 1px solid rgba(88,240,208,.18);
  border-radius: 999px;
  color: #c9d7e8;
  background: rgba(88,240,208,.05);
  font-size: .84rem;
  white-space: nowrap;
}
.leadership-skill { grid-column: 1 / -1; }
.projects-grid { grid-template-columns: repeat(3, 1fr); }
.project-card { display: flex; min-height: 310px; flex-direction: column; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(135deg, rgba(88,240,208,.08), transparent 36%), rgba(255,255,255,.035); transition: transform .2s ease, border-color .2s ease; }
.project-card:hover { transform: translateY(-4px); border-color: rgba(88,240,208,.42); }
.project-card > a { align-self: flex-start; margin-bottom: 18px; color: var(--cyan); font-weight: 900; }
.project-card h3 { font-size: 1.28rem; margin-bottom: 12px; }
.project-card p { margin: 0; color: var(--muted); font-size: .95rem; }
.project-card div { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0; }
.project-card footer { margin-top: auto; color: var(--cyan); font-size: .82rem; }
.github-more { display: flex; justify-content: center; margin-top: 24px; }
.cert-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 18px; color: var(--muted); }
.cert-grid { grid-template-columns: repeat(4, 1fr); }
.cert-card { padding: 10px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,.035); cursor: pointer; text-align: left; color: inherit; transition: transform .2s ease, border-color .2s ease; }
.cert-card.is-featured { border-color: rgba(88,240,208,.48); background: linear-gradient(135deg, rgba(88,240,208,.12), rgba(76,181,255,.06)), rgba(255,255,255,.035); }
.cert-card:hover, .cert-card:focus-visible { transform: translateY(-3px); border-color: rgba(88,240,208,.42); }
.cert-media { position: relative; display: block; overflow: hidden; border-radius: 6px; background: linear-gradient(135deg, rgba(88,240,208,.12), rgba(76,181,255,.08)); aspect-ratio: 16 / 10; }
.cert-media img { width: 100%; height: 100%; object-fit: cover; opacity: .92; transition: transform .35s ease; }
.cert-badge, .cert-format {
  position: absolute;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: .24rem .48rem;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 900;
  line-height: 1;
}
.cert-badge { left: 8px; top: 8px; color: #06111f; background: linear-gradient(135deg, var(--cyan), var(--blue)); }
.cert-format { right: 8px; top: 8px; color: var(--text); border: 1px solid rgba(255,255,255,.24); background: rgba(5, 13, 24, .72); backdrop-filter: blur(10px); }
.cert-card:hover img { transform: scale(1.04); }
.cert-card h3 { min-height: 40px; margin: 10px 0 0; font-size: .9rem; line-height: 1.25; }
.contact-panel { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px; align-items: center; padding: 34px; border: 1px solid rgba(88,240,208,.28); border-radius: var(--radius); background: linear-gradient(135deg, rgba(88,240,208,.11), transparent 34%), var(--panel-strong); box-shadow: var(--shadow); }
.contact-panel h2 { font-size: clamp(2rem, 4.8vw, 4.3rem); }
.contact-panel p { max-width: 760px; margin: 16px 0 0; color: var(--muted); }
.contact-actions { display: flex; flex-direction: column; gap: 12px; min-width: 210px; }
.footer { padding: 30px 0; color: var(--quiet); text-align: center; border-top: 1px solid var(--line); }
.modal { position: fixed; inset: 0; z-index: 100; display: none; place-items: center; padding: 18px; background: rgba(2, 8, 15, .9); backdrop-filter: blur(14px); }
.modal.is-open { display: grid; }
.modal-dialog { position: relative; width: min(1040px, 100%); max-height: 92vh; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel-strong); overflow: auto; box-shadow: var(--shadow); }
.modal-header { position: sticky; top: 0; z-index: 2; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px; border-bottom: 1px solid var(--line); background: rgba(5, 13, 24, .92); backdrop-filter: blur(12px); }
.modal-title { margin: 0; font-weight: 900; }
.modal-actions { display: flex; align-items: center; gap: 8px; }
.modal-link { min-height: 38px; padding: .55rem .72rem; font-size: .86rem; }
.modal-close { display: inline-grid; place-items: center; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,.05); color: var(--text); cursor: pointer; font-size: 1.7rem; line-height: 1; }
.lightbox-image { width: 100%; max-height: 78vh; object-fit: contain; background: #020812; }
.lightbox-frame { display: block; width: 100%; height: min(78vh, 900px); border: 0; background: #020812; }
.lightbox-image[hidden], .lightbox-frame[hidden] { display: none; }
.resume-frame { width: 100%; height: min(78vh, 900px); border: 0; background: #020812; }
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .65s ease, transform .65s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 980px) {
  .nav-links { position: fixed; left: 20px; right: 20px; top: 74px; display: none; flex-direction: column; align-items: stretch; gap: 4px; padding: 14px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(5, 13, 24, .96); box-shadow: var(--shadow); }
  .nav-links.is-open { display: flex; }
  .nav-links a { padding: 12px; }
  .nav-resume { justify-content: center; width: 100%; min-height: 42px; }
  .menu-button { display: block; }
  .hero, .about-grid, .timeline-layout, .contact-panel, .section-head { grid-template-columns: 1fr; }
  .profile-card { max-width: 430px; margin: 0 auto; }
  .direction-strip, .focus-grid, .skill-matrix, .projects-grid, .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-actions { flex-direction: row; flex-wrap: wrap; }
}

@media (max-width: 680px) {
  .container { width: min(100% - 28px, var(--container)); }
  body::before, #neural-field { display: none; }
  main { padding-top: 76px; }
  .site-header { padding: 10px 0; background: rgba(5, 13, 24, .9); border-bottom: 1px solid var(--line); }
  .hero { min-height: auto; gap: 28px; padding: 30px 0 22px; }
  h1 { font-size: clamp(2.7rem, 16vw, 4.1rem); }
  .hero-subtitle { font-size: 1.08rem; }
  .hero-copy { font-size: .98rem; }
  .hero-actions, .contact-actions { align-items: stretch; flex-direction: column; }
  .hero-actions .btn, .contact-actions .btn { width: 100%; }
  .social-row { justify-content: center; }
  .profile-card { padding: 10px; }
  .profile-badge { left: 18px; right: 18px; bottom: 18px; }
  .direction-strip, .focus-grid, .skill-matrix, .projects-grid, .cert-grid { grid-template-columns: 1fr; }
  .direction-card { min-height: 112px; }
  .section-block { padding: 54px 0; }
  .section-head { gap: 14px; margin-bottom: 22px; }
  .about-copy, .timeline-column, .contact-panel { padding: 20px; }
  .project-card { min-height: auto; }
  .cert-toolbar { align-items: flex-start; flex-direction: column; }
  .modal-header { align-items: flex-start; flex-direction: column; }
  .modal-actions { width: 100%; }
  .modal-link { flex: 1; }
  .modal-close { margin-left: auto; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}