:root {
  --bg: #07111f;
  --bg-soft: #0f1f36;
  --bg-lighter: #142846;
  --surface: rgba(255, 255, 255, 0.1);
  --surface-strong: rgba(255, 255, 255, 0.16);
  --surface-light: rgba(255, 255, 255, 0.92);
  --text: #f7fbff;
  --text-muted: #b7c7da;
  --text-dark: #102033;
  --primary: #70e1f5;
  --secondary: #ffd194;
  --accent: #c084fc;
  --accent-2: #4ade80;
  --border: rgba(255, 255, 255, 0.16);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.32);
  --radius-lg: 32px;
  --radius-md: 22px;
  --radius-sm: 14px;
  --container: 1180px;
  --header-height: 78px;
  --font-body: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading: "Space Grotesk", "Inter", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 22px);
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.7;
  background:
    radial-gradient(circle at 12% 18%, rgba(112, 225, 245, 0.2), transparent 34rem),
    radial-gradient(circle at 86% 12%, rgba(192, 132, 252, 0.2), transparent 32rem),
    radial-gradient(circle at 50% 90%, rgba(255, 209, 148, 0.14), transparent 34rem),
    linear-gradient(135deg, #07111f 0%, #101d34 44%, #1d1232 100%);
}

body.is-loading {
  overflow: hidden;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.8), transparent 82%);
}

body::after {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background: linear-gradient(180deg, transparent 0%, rgba(7, 17, 31, 0.74) 100%);
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.page-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 1rem;
  color: var(--text);
  background:
    radial-gradient(circle at center, rgba(112, 225, 245, 0.18), transparent 24rem),
    #07111f;
  transition: opacity 0.7s ease, visibility 0.7s ease;
}

.loader-orb {
  width: 74px;
  height: 74px;
  border-radius: 50%;
  background: conic-gradient(from 180deg, var(--primary), var(--accent), var(--secondary), var(--primary));
  animation: spin 1s linear infinite;
  box-shadow: 0 0 50px rgba(112, 225, 245, 0.32);
}

.loader-orb::after {
  display: block;
  width: 50px;
  height: 50px;
  margin: 12px;
  border-radius: inherit;
  content: "";
  background: #07111f;
}

.page-loader p {
  color: var(--text-muted);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

body.loaded .page-loader {
  visibility: hidden;
  opacity: 0;
}

.site-content {
  opacity: 0;
  transform: translateY(18px) scale(0.985);
  transition: opacity 0.9s ease, transform 0.9s ease;
}

body.loaded .site-content {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  min-height: var(--header-height);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(7, 17, 31, 0.7);
  backdrop-filter: blur(22px);
  transition: box-shadow 0.3s ease, background 0.3s ease;
}

.site-header.is-scrolled {
  background: rgba(7, 17, 31, 0.88);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.26);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 32px), var(--container));
  min-height: var(--header-height);
  margin: 0 auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.brand-mark {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 16px;
  color: var(--text-dark);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 14px 28px rgba(112, 225, 245, 0.18);
}

.brand-text {
  color: var(--text);
  font-size: 1.02rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
}

.nav-links a {
  position: relative;
  display: inline-flex;
  padding: 0.7rem 0.9rem;
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 700;
  transition: color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}

.nav-links a::after {
  position: absolute;
  right: 0.9rem;
  bottom: 0.38rem;
  left: 0.9rem;
  height: 2px;
  border-radius: 999px;
  content: "";
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-links a.active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-1px);
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

.menu-toggle {
  display: none;
  width: 46px;
  height: 46px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 14px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 21px;
  height: 2px;
  margin: 3px 0;
  border-radius: 999px;
  background: var(--text);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

main {
  width: min(calc(100% - 32px), var(--container));
  margin: 0 auto;
}

.section-shell {
  position: relative;
  margin: 30px 0;
  scroll-margin-top: calc(var(--header-height) + 24px);
}

.hero {
  display: grid;
  min-height: calc(100vh - var(--header-height));
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, 0.88fr);
  align-items: center;
  gap: clamp(1.5rem, 5vw, 5rem);
  padding: clamp(4rem, 9vw, 8rem) 0 clamp(3.5rem, 8vw, 6rem);
}

.hero-glow {
  position: absolute;
  z-index: -1;
  border-radius: 999px;
  filter: blur(8px);
  opacity: 0.75;
  animation: floatGlow 7s ease-in-out infinite alternate;
}

.hero-glow-one {
  top: 16%;
  right: 18%;
  width: 240px;
  height: 240px;
  background: rgba(112, 225, 245, 0.16);
}

.hero-glow-two {
  bottom: 14%;
  left: 0;
  width: 280px;
  height: 280px;
  background: rgba(192, 132, 252, 0.13);
  animation-delay: 1.4s;
}

.eyebrow,
.section-kicker {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  padding: 0.45rem 0.78rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  color: var(--primary);
  background: rgba(112, 225, 245, 0.08);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.profile-card h2 {
  font-family: var(--font-heading);
  line-height: 1.03;
  letter-spacing: -0.055em;
}

.hero h1 {
  max-width: 760px;
  margin-bottom: 1rem;
  font-size: clamp(3.4rem, 9vw, 7.8rem);
}

.hero-subtitle {
  color: var(--secondary);
  font-size: clamp(1.1rem, 2vw, 1.55rem);
  font-weight: 800;
}

.hero-description {
  max-width: 720px;
  margin-top: 1.2rem;
  color: var(--text-muted);
  font-size: clamp(1rem, 1.7vw, 1.22rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  min-height: 48px;
  padding: 0.82rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-3px);
}

.btn-primary {
  color: var(--text-dark);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 18px 42px rgba(112, 225, 245, 0.22);
}

.btn-secondary {
  border-color: rgba(255, 255, 255, 0.18);
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
}

.hero-stats {
  display: grid;
  max-width: 760px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 2.2rem;
}

.hero-stats div,
.glass-card,
.mini-card,
.education-item,
.experience-item,
.project-column,
.publication-column,
.skill-group {
  border: 1px solid var(--border);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.13), rgba(255, 255, 255, 0.06));
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.hero-stats div {
  padding: 1rem;
  border-radius: var(--radius-sm);
}

.hero-stats strong,
.hero-stats span {
  display: block;
}

.hero-stats strong {
  font-size: 1rem;
}

.hero-stats span {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.profile-card {
  position: relative;
  overflow: hidden;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.08)),
    rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
  backdrop-filter: blur(22px);
}

.profile-card::before {
  position: absolute;
  top: -25%;
  right: -25%;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  content: "";
  background: radial-gradient(circle, rgba(255, 209, 148, 0.28), transparent 68%);
}

.portrait-shell {
  position: relative;
  display: grid;
  overflow: hidden;
  min-height: 360px;
  place-items: center;
  border-radius: 26px;
  background:
    linear-gradient(135deg, rgba(112, 225, 245, 0.2), rgba(192, 132, 252, 0.2)),
    rgba(255, 255, 255, 0.08);
}

.avatar-gradient {
  display: grid;
  width: 168px;
  height: 168px;
  place-items: center;
  border-radius: 48px;
  color: var(--text-dark);
  font-family: var(--font-heading);
  font-size: 3.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
  box-shadow: 0 30px 80px rgba(112, 225, 245, 0.24);
}

.profile-pic {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.portrait-shell.image-missing .profile-pic {
  display: none;
}

.profile-card-body {
  position: relative;
  padding: 1.35rem 0.5rem 0.45rem;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  color: var(--accent-2);
  font-size: 0.82rem;
  font-weight: 800;
}

.status-pill i {
  font-size: 0.6rem;
}

.profile-card h2 {
  margin-bottom: 0.65rem;
  font-size: 2rem;
}

.profile-card p {
  color: var(--text-muted);
}

.content-section {
  padding: clamp(4rem, 7vw, 6.5rem) 0;
}

.section-heading {
  max-width: 760px;
  margin: 0 auto 2.4rem;
  text-align: center;
}

.section-heading .section-kicker {
  margin-right: auto;
  margin-left: auto;
}

.section-heading h2 {
  margin-bottom: 0.8rem;
  font-size: clamp(2.3rem, 5vw, 4.5rem);
}

.section-heading p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 1rem;
}

.glass-card,
.mini-card,
.education-item,
.experience-item,
.project-column,
.publication-column,
.skill-group {
  border-radius: var(--radius-md);
}

.about-copy {
  display: grid;
  align-content: center;
  min-height: 100%;
  padding: clamp(1.4rem, 4vw, 2.3rem);
}

.about-copy p {
  color: var(--text-muted);
  font-size: 1.08rem;
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.mini-card {
  padding: 1.35rem;
}

.mini-card i {
  display: inline-grid;
  width: 44px;
  height: 44px;
  margin-bottom: 1rem;
  place-items: center;
  border-radius: 15px;
  color: var(--text-dark);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.mini-card h3,
.education-item h3,
.experience-item h3,
.project-column h3,
.publication-column h3,
.skill-group h3 {
  margin-bottom: 0.55rem;
  color: var(--text);
  font-family: var(--font-heading);
  letter-spacing: -0.03em;
}

.mini-card p,
.education-item p,
.experience-item p {
  color: var(--text-muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.education-item {
  position: relative;
  overflow: hidden;
  padding: 1.45rem;
}

.education-item::before,
.experience-item::before {
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  content: "";
  background: linear-gradient(180deg, var(--primary), var(--accent), var(--secondary));
}

.meta-pill {
  display: inline-flex;
  width: fit-content;
  margin-bottom: 0.9rem;
  padding: 0.32rem 0.68rem;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 999px;
  color: var(--secondary);
  background: rgba(255, 255, 255, 0.07);
  font-size: 0.78rem;
  font-weight: 800;
}

.detail-label {
  color: var(--primary);
  font-weight: 800;
}

.skills-container {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.skill-group {
  padding: 1.35rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.62rem;
  margin-top: 1rem;
}

.skill-tag {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0.45rem 0.72rem;
  border: 1px solid rgba(112, 225, 245, 0.26);
  border-radius: 999px;
  color: #dff9ff;
  background: rgba(112, 225, 245, 0.08);
  font-size: 0.9rem;
  font-weight: 700;
  transition: transform 0.22s ease, background 0.22s ease, border-color 0.22s ease;
}

.skill-tag:hover {
  border-color: rgba(255, 209, 148, 0.55);
  background: rgba(255, 209, 148, 0.11);
  transform: translateY(-2px);
}

.timeline {
  position: relative;
  display: grid;
  gap: 1rem;
  max-width: 960px;
  margin: 0 auto;
}

.timeline::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 1.2rem;
  width: 2px;
  content: "";
  background: linear-gradient(180deg, var(--primary), var(--accent), transparent);
}

.experience-item {
  position: relative;
  margin-left: 3rem;
  padding: 1.45rem;
}

.experience-item::after {
  position: absolute;
  top: 1.35rem;
  left: -2.43rem;
  width: 14px;
  height: 14px;
  border: 4px solid #0a1628;
  border-radius: 50%;
  content: "";
  background: var(--primary);
  box-shadow: 0 0 0 6px rgba(112, 225, 245, 0.12);
}

.projects-layout {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 1rem;
}

.project-column,
.publication-column {
  padding: 1.45rem;
}

.item-list {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
  list-style: none;
}

.item-list li {
  position: relative;
  padding: 0.85rem 0.95rem 0.85rem 2.35rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.055);
}

.item-list li::before {
  position: absolute;
  top: 0.95rem;
  left: 0.95rem;
  color: var(--secondary);
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  content: "\f058";
}

.contact-section {
  padding-bottom: clamp(4rem, 8vw, 7rem);
}

.contact-card {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  max-width: 820px;
  margin: 0 auto;
  padding: 1.35rem;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.85rem 1rem;
  border-radius: 999px;
  color: var(--text-dark);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  font-weight: 800;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.contact-link.muted {
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
}

.contact-link:hover,
.contact-link:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 20px 45px rgba(112, 225, 245, 0.18);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  width: min(calc(100% - 32px), var(--container));
  margin: 0 auto;
  padding: 2rem 0 2.4rem;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.back-to-top {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  transition: transform 0.25s ease, background 0.25s ease;
}

.back-to-top:hover,
.back-to-top:focus-visible {
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-3px);
}

.reveal-on-scroll {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.72s ease, transform 0.72s ease;
}

.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes floatGlow {
  from {
    transform: translate3d(0, 0, 0) scale(1);
  }

  to {
    transform: translate3d(28px, -26px, 0) scale(1.08);
  }
}

@media (max-width: 1024px) {
  .hero,
  .about-grid,
  .projects-layout {
    grid-template-columns: 1fr;
  }

  .profile-card {
    max-width: 680px;
  }

  .card-grid,
  .skills-container {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 840px) {
  :root {
    --header-height: 70px;
  }

  .menu-toggle {
    display: grid;
  }

  .nav-links {
    position: absolute;
    top: calc(100% + 10px);
    right: 16px;
    left: 16px;
    display: grid;
    visibility: hidden;
    gap: 0.35rem;
    padding: 0.75rem;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 22px;
    opacity: 0;
    background: rgba(7, 17, 31, 0.94);
    box-shadow: var(--shadow);
    transform: translateY(-12px) scale(0.98);
    transform-origin: top;
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
    backdrop-filter: blur(22px);
  }

  .nav-links.is-open {
    visibility: visible;
    opacity: 1;
    transform: translateY(0) scale(1);
  }

  .nav-links a {
    justify-content: center;
  }

  .hero {
    min-height: auto;
    padding-top: 4rem;
  }

  .hero-stats,
  .focus-grid,
  .card-grid,
  .skills-container {
    grid-template-columns: 1fr;
  }

  .portrait-shell {
    min-height: 300px;
  }

  .timeline::before {
    left: 0.72rem;
  }

  .experience-item {
    margin-left: 2.2rem;
  }

  .experience-item::after {
    left: -2.01rem;
  }
}

@media (max-width: 560px) {
  main,
  .navbar,
  .site-footer {
    width: min(calc(100% - 24px), var(--container));
  }

  .brand-text {
    display: none;
  }

  .hero h1 {
    font-size: clamp(3rem, 18vw, 4.2rem);
  }

  .hero-actions,
  .contact-card {
    align-items: stretch;
    flex-direction: column;
  }

  .btn,
  .contact-link {
    width: 100%;
  }

  .section-heading {
    text-align: left;
  }

  .section-heading .section-kicker {
    margin-left: 0;
  }

  .site-footer {
    flex-direction: column;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}