:root {
  --ink: #eef4f8;
  --text: #d9e4ed;
  --muted: #a9b8c5;
  --line: rgba(160, 176, 190, 0.18);
  --soft: #121c27;
  --paper: #071019;
  --white: #ffffff;
  --accent: #72dac9;
  --accent-dark: #92f1df;
  --signal: #d6b16f;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
  --header-bg: rgba(7, 16, 25, 0.84);
  --band: #0b1520;
  --card: rgba(18, 30, 42, 0.92);
  --tile: rgba(255, 255, 255, 0.055);
  --hero-line: rgba(114, 218, 201, 0.18);
  --radius: 8px;
}

body[data-theme="light"] {
  --ink: #14213d;
  --text: #26344d;
  --muted: #68748a;
  --line: #dce5ee;
  --soft: #eef5f6;
  --paper: #fbfcf8;
  --white: #ffffff;
  --accent: #0d9488;
  --accent-dark: #0f766e;
  --signal: #9a5f11;
  --shadow: 0 18px 54px rgba(20, 33, 61, 0.11);
  --header-bg: rgba(251, 252, 248, 0.88);
  --band: #f3f8f7;
  --card: #ffffff;
  --tile: #fbfcf8;
  --hero-line: rgba(13, 148, 136, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, rgba(114, 218, 201, 0.05), transparent 360px),
    var(--paper);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  transition: background-color 180ms ease, color 180ms ease;
}

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

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

button {
  font: inherit;
}

.sr-only,
.skip-link {
  position: absolute;
  height: 1px;
  width: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
}

.skip-link:focus {
  height: auto;
  width: auto;
  clip: auto;
  z-index: 100;
  left: 1rem;
  top: 1rem;
  padding: 0.75rem 1rem;
  background: var(--ink);
  color: var(--white);
  border-radius: var(--radius);
}

.shell {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--header-bg);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.brand,
.nav-links,
.social-row,
.hero-actions,
.link-row,
.pill-row,
.filter-pills {
  display: flex;
  align-items: center;
}

.brand {
  gap: 0.75rem;
  color: var(--ink);
  font-weight: 800;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--ink);
  color: var(--white);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.88rem;
}

.brand-avatar {
  width: 44px;
  aspect-ratio: 1;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--line);
  background: var(--soft);
}

.nav-links {
  gap: 0.25rem;
}

.nav-links a {
  padding: 0.7rem 0.85rem;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 700;
  font-size: 0.92rem;
}

.nav-links a:hover {
  color: var(--accent-dark);
  background: var(--hero-line);
}

.nav-toggle,
.theme-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  border-radius: var(--radius);
  width: 44px;
  height: 44px;
}

.theme-toggle {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  cursor: pointer;
}

.section-pad {
  padding: 82px 0 68px;
}

.section {
  padding: 86px 0;
}

.snapshot {
  margin-top: -24px;
  padding-bottom: 36px;
}

.snapshot > div {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.8rem;
}

.highlight {
  min-height: 142px;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
}

.highlight strong {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--accent-dark);
  font-family: "JetBrains Mono", monospace;
  font-size: 1.5rem;
}

.highlight span {
  display: block;
  color: var(--ink);
  font-weight: 800;
}

.highlight p {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.band {
  background: var(--band);
  border-block: 1px solid var(--line);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  align-items: center;
  gap: 4.75rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--accent-dark);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1 {
  max-width: 640px;
  margin-bottom: 1.1rem;
  color: var(--ink);
  font-size: clamp(2.15rem, 3.45vw, 3.75rem);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  color: var(--ink);
  font-size: clamp(1.75rem, 2.4vw, 2.55rem);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  color: var(--ink);
  line-height: 1.25;
}

.lead {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.02rem;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.8rem;
}

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.8rem 1.05rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  font-weight: 800;
}

.button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #071019;
}

.button.ghost {
  background: transparent;
  color: var(--ink);
}

.profile-card,
.skill-card,
.experience-card,
.project-card,
.certificate-card,
.contact-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
}

.profile-card {
  padding: 1.1rem;
}

.profile-card > img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--soft);
  border: 1px solid var(--line);
}

.profile-card h2 {
  margin: 1.15rem 0 0.25rem;
  font-size: 1.45rem;
}

.profile-card p {
  margin-bottom: 1rem;
  color: var(--muted);
}

.quick-facts {
  display: grid;
  gap: 0.65rem;
  margin: 0;
  padding-block: 1rem;
  border-block: 1px solid var(--line);
}

.quick-facts div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.quick-facts dt {
  color: var(--muted);
  font-size: 0.86rem;
}

.quick-facts dd {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  text-align: right;
}

.social-row {
  gap: 0.5rem;
  margin-top: 1rem;
}

.social-row a {
  display: grid;
  place-items: center;
  width: 40px;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--ink);
  background: var(--tile);
}

.social-row a:hover {
  color: var(--white);
  border-color: var(--accent);
  background: var(--accent);
}

.section-heading {
  margin-bottom: 2rem;
}

.section-heading.split {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
}

.section-note {
  max-width: 480px;
  margin-bottom: 0;
  color: var(--muted);
}

.chip-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.85rem;
}

.interest {
  min-height: 96px;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
}

.interest i {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 42px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--hero-line);
  color: var(--accent-dark);
  font-size: 1.25rem;
}

.interest span {
  color: var(--ink);
  font-weight: 800;
}

.timeline,
.stack,
.publication-list {
  display: grid;
  gap: 1rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 1.1rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
}

.education-logo {
  width: 100%;
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--tile);
  border: 1px solid var(--line);
  padding: 0.75rem;
}

.education-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transform: scale(var(--logo-scale, 1));
}

.item-head {
  display: flex;
  justify-content: space-between;
  gap: 1.2rem;
}

.item-head h3 {
  margin-bottom: 0.25rem;
  font-size: 1.25rem;
}

.item-head h3 a:hover,
.pub-meta a:hover,
.link-row a:hover,
.certificate-card a:hover,
.footer a:hover,
.contact-card a:hover {
  color: var(--accent-dark);
}

.item-head p,
.metric,
.muted {
  color: var(--muted);
}

.item-head span {
  flex: 0 0 auto;
  color: var(--signal);
  font-weight: 800;
  font-size: 0.9rem;
  text-align: right;
}

.detail-block {
  margin-top: 0.9rem;
}

.detail-block h4 {
  margin-bottom: 0.35rem;
  color: var(--ink);
  font-size: 0.92rem;
  text-transform: uppercase;
}

ul {
  margin: 0;
  padding-left: 1.2rem;
}

li + li {
  margin-top: 0.35rem;
}

.skill-columns {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 1rem;
}

.skill-card {
  padding: 1.2rem;
}

.skill-card h3 {
  margin-bottom: 1rem;
}

.logo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
  gap: 0.75rem;
}

.logo-tile {
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 0.65rem;
  min-height: 120px;
  padding: 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--tile);
  text-align: center;
}

.logo-tile img {
  width: 86px;
  height: 52px;
  object-fit: contain;
}

.logo-tile span {
  color: var(--ink);
  font-weight: 800;
  font-size: 0.86rem;
}

.experience-card {
  padding: 1.2rem;
}

.publication {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 1.2rem;
  padding: 1.2rem 0;
  border-top: 1px solid var(--line);
}

.publication:last-child {
  border-bottom: 1px solid var(--line);
}

.pub-index {
  color: var(--accent-dark);
  font-family: "JetBrains Mono", monospace;
  font-weight: 800;
}

.publication h3 {
  margin-bottom: 0.45rem;
  font-size: 1.15rem;
}

.publication p {
  margin-bottom: 0.65rem;
  color: var(--muted);
}

.pub-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  color: var(--signal);
  font-weight: 800;
  font-size: 0.9rem;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(295px, 1fr));
  justify-content: start;
  gap: 0.9rem;
}

.project-card {
  overflow: hidden;
}

.project-card > img {
  width: 100%;
  height: 138px;
  object-fit: contain;
  background: var(--tile);
  border-bottom: 1px solid var(--line);
  padding: 1rem;
}

.project-detail h1 {
  font-size: clamp(2rem, 3.2vw, 3.45rem);
}

.project-detail .profile-card > img {
  aspect-ratio: 16 / 10;
  object-fit: contain;
  padding: 1rem;
}

.project-body {
  padding: 1rem;
}

.tag,
.certificate-card span {
  color: var(--accent-dark);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
}

.project-body h3 {
  margin: 0.45rem 0 0.55rem;
  font-size: 1.05rem;
}

.project-body p {
  margin-bottom: 0.7rem;
  font-size: 0.94rem;
}

.project-filters {
  margin: -0.5rem 0 1.25rem;
}

.pill-row,
.link-row,
.filter-pills {
  flex-wrap: wrap;
  gap: 0.5rem;
}

.pill {
  padding: 0.35rem 0.55rem;
  border-radius: 999px;
  background: var(--hero-line);
  color: var(--accent-dark);
  font-size: 0.82rem;
  font-weight: 800;
}

.link-row {
  margin-top: 1rem;
}

.link-row a,
.certificate-card a {
  color: var(--ink);
  font-weight: 800;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.filter-pills button {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink);
  padding: 0.55rem 0.8rem;
  cursor: pointer;
  font-weight: 800;
}

.filter-pills button.active,
.filter-pills button:hover {
  border-color: var(--accent);
  background: var(--accent);
  color: #071019;
}

.certificate-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
  gap: 0.9rem;
}

.certificate-card {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 0.9rem;
  align-items: center;
  min-height: 150px;
  padding: 0.9rem;
  box-shadow: none;
}

.certificate-card img {
  width: 86px;
  aspect-ratio: 1;
  object-fit: contain;
  padding: 0.55rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--tile);
}

.certificate-card h3 {
  margin: 0.35rem 0 0.75rem;
  font-size: 1rem;
}

.contact-band {
  background: #06101a;
  color: rgba(255, 255, 255, 0.78);
}

.contact-band h2,
.contact-band .eyebrow {
  color: #ffffff;
}

.contact-band .lead {
  color: rgba(255, 255, 255, 0.72);
}

.contact-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 2rem;
  align-items: start;
}

.contact-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.contact-card {
  display: grid;
  gap: 0.35rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.14);
  color: #ffffff;
  box-shadow: none;
}

.contact-card i {
  color: #5eead4;
  font-size: 1.35rem;
}

.contact-card span {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.84rem;
  font-weight: 700;
}

.contact-card strong,
.contact-card a {
  overflow-wrap: anywhere;
}

.email-list a {
  display: block;
}

.contact-socials .social-row {
  margin-top: 0.2rem;
}

.contact-socials .social-row a {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.14);
  color: #ffffff;
}

.contact-socials .social-row a:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #071019;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.4rem 0;
  color: var(--muted);
}

.footer p {
  margin: 0;
}

.footer a {
  color: var(--ink);
  font-weight: 800;
}

@media (max-width: 900px) {
  .nav-toggle {
    display: grid;
    place-items: center;
  }

  .nav-links {
    position: absolute;
    top: 76px;
    right: 20px;
    left: 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--card);
    box-shadow: var(--shadow);
  }

  .project-nav {
    position: static;
    display: flex;
    flex-direction: row;
    align-items: center;
    padding: 0;
    border: 0;
    background: transparent;
    box-shadow: none;
  }

  .nav-links.open {
    display: flex;
  }

  .hero,
  .skill-columns,
  .contact-layout,
  .snapshot > div {
    grid-template-columns: 1fr;
  }

  .profile-card {
    max-width: 480px;
  }

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

  .section-heading.split,
  .item-head {
    align-items: start;
    flex-direction: column;
  }

  .item-head span {
    text-align: left;
  }
}

@media (max-width: 620px) {
  .shell {
    width: min(100% - 28px, 1120px);
  }

  .section-pad,
  .section {
    padding-block: 58px;
  }

  .brand span:last-child {
    display: none;
  }

  h1 {
    font-size: 2.25rem;
  }

  .chip-grid,
  .timeline-item,
  .contact-cards,
  .publication,
  .certificate-card,
  .project-grid {
    grid-template-columns: 1fr;
  }

  .education-logo {
    max-height: 160px;
  }

  .quick-facts div,
  .footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .quick-facts dd {
    text-align: left;
  }
}