:root {
  color-scheme: dark;
  --bg: #020b1a;
  --bg-2: #07182d;
  --bg-soft: rgba(10, 19, 33, 0.9);
  --panel: rgba(11, 18, 30, 0.8);
  --card: rgba(10, 17, 28, 0.88);
  --card-alt: rgba(15, 23, 35, 0.94);
  --text: #ebf1ff;
  --muted: #a1afc4;
  --muted-strong: #d5e4ff;
  --line: rgba(124, 160, 219, 0.15);
  --line-strong: rgba(118, 167, 241, 0.25);
  --cyan: #76d9ff;
  --blue: #4b8dff;
  --navy: #12375a;
  --navy-2: #0e213f;
  --purple: #7d8cff;
  --green: #5ae0b5;
  --shadow: 0 25px 70px rgba(1, 6, 14, 0.72);
  --container: 1180px;
  --radius: 22px;
  font-family: "Inter", sans-serif;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  position: relative;
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 15% 20%, rgba(63, 108, 180, 0.22), transparent 28%),
    radial-gradient(circle at 80% 10%, rgba(109, 95, 255, 0.18), transparent 32%),
    radial-gradient(circle at 50% 82%, rgba(10, 16, 28, 0.86), transparent 38%),
    linear-gradient(180deg, #010910 0%, #020b16 30%, #01070d 100%);
  color: var(--text);
  font-family: "Inter", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: linear-gradient(120deg, transparent 0%, rgba(118, 228, 255, 0.04) 35%, transparent 100%);
  pointer-events: none;
}

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

a { color: inherit; }

button, input, textarea { font: inherit; }

::selection {
  background: rgba(118, 228, 255, 0.28);
  color: var(--text);
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(157, 181, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(157, 181, 255, 0.05) 1px, transparent 1px);
  background-size: 30px 30px;
  mask-image: radial-gradient(circle at center, black 42%, transparent 100%);
  pointer-events: none;
  opacity: 0.7;
}

.tech-background {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  opacity: 1;
}

.tech-background::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(20, 36, 62, 0.35), transparent 54%);
}

.gear {
  position: absolute;
  left: var(--x);
  top: var(--y);
  color: rgba(14, 38, 65, 1);
  transform: scale(var(--scale));
  filter: drop-shadow(0 0 28px rgba(85, 153, 255, 0.42));
  animation: spin var(--speed) linear infinite;
  opacity: 1;
}

.gear-xl { --x: 8%; --y: 15%; --scale: 1; --speed: 34s; }
.gear-lg { --x: 70%; --y: 16%; --scale: 0.9; --speed: 28s; }
.gear-md { --x: 20%; --y: 74%; --scale: 0.72; --speed: 22s; }
.gear-sm { --x: 82%; --y: 70%; --scale: 0.52; --speed: 18s; }

@keyframes spin {
  from { transform: rotate(0deg) scale(var(--scale)); }
  to { transform: rotate(360deg) scale(var(--scale)); }
}

.container {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(2, 11, 26, 0.7);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(118, 167, 241, 0.14);
  box-shadow: inset 0 -1px 0 rgba(255,255,255,0.02);
  transition: box-shadow 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

main,
.site-footer {
  position: relative;
  z-index: 1;
}

.site-header.scrolled {
  background: rgba(2, 11, 26, 0.84);
  box-shadow: 0 20px 50px rgba(0,0,0,0.25);
  border-bottom-color: var(--line-strong);
}

.header-inner {
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--text);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(118, 228, 255, 0.22), rgba(159, 123, 255, 0.2));
  border: 1px solid rgba(118, 228, 255, 0.32);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.16), 0 0 18px rgba(118, 228, 255, 0.12);
  color: var(--cyan);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: -0.06em;
}

.nav-menu {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 22px;
}

.nav-menu a {
  position: relative;
  text-decoration: none;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
}

.nav-menu a::after {
  content: "";
  position: absolute;
  bottom: -7px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  transition: width 0.2s ease;
}

.nav-menu a:hover,
.nav-menu a:focus-visible {
  color: var(--text);
}

.nav-menu a:hover::after,
.nav-menu a:focus-visible::after {
  width: 100%;
}

.hero {
  position: relative;
  padding: 80px 0 70px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 42px;
}

.hero-copy,
.hero-panel {
  min-width: 0;
  width: 100%;
}

.eyebrow,
.section-label {
  margin: 0 0 16px;
  color: var(--cyan);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero-copy h1 {
  margin: 0;
  max-width: 700px;
  font-size: clamp(2.7rem, 5vw, 5rem);
  line-height: 0.96;
  letter-spacing: -0.07em;
  font-weight: 700;
  color: var(--text);
}

.hero-summary {
  max-width: 650px;
  margin-top: 24px;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.85;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 14px;
  margin-top: 28px;
}

.link-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid rgba(118, 228, 255, 0.2);
  background: linear-gradient(180deg, rgba(13, 17, 25, 0.88), rgba(9, 13, 20, 0.8));
  color: var(--muted-strong);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.78rem;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.link-pill:hover,
.link-pill:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(118, 228, 255, 0.52);
  background: linear-gradient(180deg, rgba(18, 33, 44, 0.92), rgba(11, 18, 27, 0.86));
  box-shadow: 0 0 0 1px rgba(118,228,255,0.12), 0 12px 28px rgba(94,167,255,0.18);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(118, 228, 255, 0.06);
  border: 1px solid rgba(118, 228, 255, 0.12);
  color: var(--muted-strong);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
}

.hero-panel {
  position: relative;
  padding: 18px;
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(11, 15, 24, 0.94), rgba(9, 13, 21, 0.88));
  border: 1px solid rgba(148, 163, 184, 0.16);
  box-shadow: 0 30px 80px rgba(1, 6, 14, 0.72), inset 0 1px 0 rgba(255,255,255,0.04);
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: -30% 15% auto auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(118,228,255,0.28), transparent 70%);
  filter: blur(18px);
  pointer-events: none;
}

.panel-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px 14px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.14);
  font-size: 0.75rem;
  color: var(--muted);
}

.panel-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-red { background: #ff6b6b; }
.dot-yellow { background: #ffca61; }
.dot-green { background: #46d39a; }

.panel-title {
  margin-left: auto;
  color: var(--muted-strong);
  font-weight: 600;
}

.panel-body {
  padding: 18px 8px 8px;
}

.panel-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.panel-badges span {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(118,228,255,0.12);
  background: rgba(118,228,255,0.04);
  color: var(--muted-strong);
  font-size: 0.72rem;
}

.status-stack {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

.status-row {
  display: grid;
  grid-template-columns: 70px 1fr;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  font-size: 0.74rem;
}

.status-bar {
  position: relative;
  height: 10px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.12);
  overflow: hidden;
}

.status-bar i {
  display: block;
  width: var(--w);
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  box-shadow: 0 0 18px rgba(118,228,255,0.5);
}

.panel-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 14px;
  margin-top: 28px;
}

.panel-stats div {
  padding: 16px 12px;
  border-radius: 18px;
  border: 1px solid rgba(148,163,184,0.12);
  background: rgba(255,255,255,0.02);
  text-align: center;
}

.panel-stats strong {
  display: block;
  font-size: 1.6rem;
  letter-spacing: -0.06em;
  color: var(--text);
}

.panel-stats span {
  color: var(--muted);
  font-size: 0.74rem;
}

.section-block {
  position: relative;
  padding: 110px 0;
  border-top: 1px solid var(--line);
}

.section-alt {
  background: linear-gradient(180deg, rgba(12, 16, 26, 0.52), rgba(10, 13, 20, 0.2));
}

.section-heading {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(2.1rem, 4vw, 3.4rem);
  line-height: 1.02;
  letter-spacing: -0.06em;
  color: var(--text);
}

.section-heading.compact {
  margin-bottom: 16px;
}

.section-copy {
  max-width: 760px;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.8;
  margin: 0;
}

.section-copy h3 {
  margin: 0 0 18px;
  color: var(--text);
  font-size: clamp(1.25rem, 2vw, 1.7rem);
  letter-spacing: -0.05em;
  line-height: 1.2;
}

.section-copy.emphasis {
  margin-top: 10px;
  font-size: 1.15rem;
  color: var(--muted-strong);
}

.project-card,
.feature-card,
.recognition-card,
.research-card,
.contact-form {
  position: relative;
  background: linear-gradient(180deg, rgba(14, 20, 30, 0.92), rgba(11, 15, 24, 0.9));
  border: 1px solid rgba(148,163,184,0.12);
  border-radius: var(--radius);
  box-shadow: 0 22px 60px rgba(1, 6, 14, 0.46), inset 0 1px 0 rgba(255,255,255,0.03);
}

.project-card {
  padding: 28px 26px;
  margin-top: 18px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.project-card:first-of-type,
.feature-card:first-of-type,
.recognition-card:first-of-type,
.research-card:first-of-type {
  margin-top: 0;
}

.project-card:hover,
.feature-card:hover,
.recognition-card:hover,
.research-card:hover {
  transform: translateY(-2px);
  border-color: rgba(118,228,255,0.22);
  box-shadow: 0 26px 70px rgba(11, 18, 32, 0.6), inset 0 1px 0 rgba(255,255,255,0.04);
}

.card-kicker {
  display: inline-flex;
  align-items: center;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(94, 167, 255, 0.08);
  border: 1px solid rgba(94, 167, 255, 0.18);
  color: var(--cyan);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 700;
}

.project-card h3,
.feature-card h3,
.recognition-card h4,
.research-card h4 {
  margin: 18px 0 0;
  color: var(--text);
  line-height: 1.2;
  letter-spacing: -0.04em;
}

.project-card h3 {
  font-size: clamp(1.5rem, 2.5vw, 2.1rem);
}

.project-card p,
.feature-card p,
.research-card p,
.research-card h4,
.recognition-card p {
  color: var(--muted);
  line-height: 1.8;
}

.project-card p {
  margin-top: 16px;
}

.project-card ul,
.feature-card ul {
  margin: 18px 0 0;
  padding-left: 1.2rem;
  color: var(--muted-strong);
  line-height: 1.9;
}

.skill-pill-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.skill-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(159, 123, 255, 0.08);
  border: 1px solid rgba(159, 123, 255, 0.2);
  color: var(--muted-strong);
  font-size: 0.72rem;
}

.feature-grid,
.recognition-grid,
.work-grid,
.experience-grid,
.research-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  margin-top: 26px;
}

#research .feature-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  align-items: stretch;
}

#engineering .feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: none;
  margin-left: 0;
  margin-right: 0;
}

#registered-software .work-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.research-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  align-items: stretch;
}

.feature-card,
.recognition-card,
.research-card {
  padding: 24px 22px;
}

#research .feature-card {
  display: flex;
  flex-direction: column;
  min-height: 220px;
}

#research .feature-card h3 {
  min-height: 58px;
  margin: 0;
}

#research .feature-card p {
  margin: 14px 0 0;
  flex: 1;
}

.research-card {
  display: flex;
  flex-direction: column;
  min-height: 250px;
}

.feature-card h3 {
  font-size: 1.25rem;
}

.feature-card p,
.research-card p {
  margin: 14px 0 0;
}

.research-card p {
  flex: 1;
}

.publication-item {
  padding: 22px 18px;
  background: rgba(13, 17, 28, 0.42);
  border: 1px solid rgba(148,163,184,0.12);
  border-radius: 18px;
  margin-top: 16px;
}

.publication-item h4 {
  margin: 0;
  color: var(--text);
  font-size: 1.08rem;
  line-height: 1.55;
}

.publication-item p {
  margin: 10px 0 0;
  color: var(--muted);
}

.publication-link {
  margin-top: 22px;
}

.inline-link {
  font-weight: 600;
  color: var(--muted-strong);
  text-decoration: none;
}

.recognition-card {
  min-height: 180px;
}

.recognition-card h4 {
  font-size: 1.2rem;
}

.recognition-card p {
  margin-top: 12px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 30px;
  align-items: start;
}

.compact {
  margin-bottom: 10px;
}

.contact-details {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

.contact-details strong {
  color: var(--muted-strong);
}

.contact-details p {
  margin: 8px 0 0;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.contact-links {
  margin-top: 24px;
}

.contact-form {
  display: grid;
  gap: 16px;
  padding: 26px;
  min-height: 100%;
}

.contact-form label {
  display: grid;
  gap: 10px;
  color: var(--muted-strong);
  font-weight: 600;
  font-size: 0.8rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid rgba(148,163,184,0.18);
  background: rgba(3, 8, 17, 0.72);
  color: var(--text);
  border-radius: 14px;
  padding: 14px 16px;
  resize: vertical;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: rgba(118,228,255,0.6);
  box-shadow: 0 0 0 3px rgba(118,228,255,0.08);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border: 0;
  border-radius: 14px;
  cursor: pointer;
  font-weight: 700;
  transition: transform 0.2s ease, filter 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.btn-primary {
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  color: #04111c;
  box-shadow: 0 12px 30px rgba(77, 142, 255, 0.34);
}

.site-footer {
  position: relative;
  z-index: 1;
  padding: 28px 0 54px;
  border-top: 1px solid rgba(118, 167, 241, 0.14);
  background: linear-gradient(180deg, rgba(5, 8, 22, 0.82), rgba(2, 7, 14, 0.92));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.02);
}

.footer-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: 0.8rem;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--muted-strong);
  text-decoration: none;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

@media (max-width: 980px) {
  .hero-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .recognition-grid,
  .work-grid,
  .experience-grid,
  .research-grid,
  #research .feature-grid,
  #engineering .feature-grid,
  #registered-software .work-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-panel {
    max-width: 520px;
    margin: 32px auto 0;
  }

  .nav-menu {
    display: none;
  }

  .header-inner {
    justify-content: center;
  }

  .hero {
    padding-top: 60px;
  }

  .section-block {
    padding: 88px 0;
  }

  .project-card,
  .feature-card,
  .recognition-card,
  .research-card,
  .contact-form {
    padding: 24px 22px;
  }
}

@media (max-width: 720px) {
  .header-inner {
    flex-direction: column;
    justify-content: center;
    padding: 18px 0;
  }

  .nav-menu {
    display: none;
  }

  .brand-mark {
    width: 30px;
    height: 30px;
    border-radius: 10px;
  }

  .hero-copy h1 {
    font-size: clamp(2.4rem, 11vw, 3.6rem);
  }

  .hero-summary {
    font-size: 1rem;
  }

  .hero-panel {
    max-width: 100%;
    margin-right: 0;
    margin-left: 0;
  }

  .feature-grid,
  .recognition-grid,
  .work-grid,
  .experience-grid,
  .research-grid,
  #research .feature-grid,
  #engineering .feature-grid,
  #registered-software .work-grid {
    grid-template-columns: 1fr;
  }

  .section-heading h2 {
    font-size: clamp(1.9rem, 7vw, 2.8rem);
  }

  .section-copy h3 {
    font-size: 1.2rem;
  }

  .project-card h3 {
    font-size: 1.55rem;
  }

  .project-card,
  .feature-card,
  .recognition-card,
  .research-card,
  .contact-form {
    padding: 22px 18px;
  }

  .link-pill {
    padding: 0 14px;
    font-size: 0.72rem;
  }

  .publication-item {
    padding: 18px 16px;
  }

  .contact-form {
    min-height: auto;
  }

  .panel-stats {
    grid-template-columns: 1fr;
  }

  .status-row {
    grid-template-columns: 60px 1fr;
  }

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

@media (max-width: 480px) {
  .container {
    width: min(var(--container), calc(100% - 28px));
  }

  .hero-links,
  .hero-meta,
  .footer-links {
    gap: 10px;
  }
}