:root {
  --ink: #121417;
  --muted: #5d6673;
  --paper: #f7f4ee;
  --surface: #ffffff;
  --line: #ded8cf;
  --accent: #c64d35;
  --accent-dark: #7d291c;
  --sage: #526b5c;
  --steel: #2f5f7f;
  --shadow: 0 20px 60px rgba(25, 29, 34, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
}

img,
svg {
  display: block;
}

a {
  color: inherit;
}

.site-header {
  align-items: center;
  backdrop-filter: blur(18px);
  background: rgba(247, 244, 238, 0.88);
  border-bottom: 1px solid rgba(222, 216, 207, 0.82);
  display: flex;
  justify-content: space-between;
  left: 0;
  padding: 14px clamp(18px, 4vw, 56px);
  position: sticky;
  right: 0;
  top: 0;
  z-index: 10;
}

.brand,
.site-nav {
  align-items: center;
  display: flex;
}

.brand {
  font-weight: 760;
  gap: 10px;
  text-decoration: none;
}

.brand-mark {
  align-items: center;
  background: var(--ink);
  border-radius: 8px;
  color: var(--surface);
  display: inline-flex;
  height: 34px;
  justify-content: center;
  width: 34px;
}

.site-nav {
  gap: clamp(12px, 2.4vw, 30px);
}

.site-nav a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 650;
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--ink);
}

.hero {
  align-items: center;
  background:
    linear-gradient(135deg, rgba(18, 20, 23, 0.98), rgba(47, 95, 127, 0.72)),
    var(--ink);
  color: var(--surface);
  display: flex;
  gap: clamp(28px, 6vw, 84px);
  justify-content: space-between;
  min-height: calc(74vh - 63px);
  overflow: hidden;
  padding: clamp(56px, 10vw, 110px) clamp(18px, 6vw, 76px);
  position: relative;
}

.hero-media {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 50%;
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.25);
  flex: 0 0 clamp(160px, 22vw, 260px);
  padding: 8px;
}

.hero-media img {
  aspect-ratio: 1;
  border-radius: 50%;
  height: auto;
  object-fit: cover;
  object-position: center top;
  width: 100%;
}

.hero-content {
  max-width: 720px;
  position: relative;
  z-index: 1;
}

.eyebrow,
.section-kicker,
.project-type {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  margin: 0 0 12px;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #f0a28d;
}

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

h1 {
  font-size: clamp(3.2rem, 8vw, 7.5rem);
  letter-spacing: 0;
  line-height: 0.92;
  margin-bottom: 24px;
}

h2 {
  font-size: clamp(2rem, 4.8vw, 4.7rem);
  letter-spacing: 0;
  line-height: 1;
  margin-bottom: 0;
}

h3 {
  font-size: 1.25rem;
  letter-spacing: 0;
  line-height: 1.2;
  margin-bottom: 12px;
}

.app-title-row {
  align-items: center;
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}

.app-title-row img {
  border-radius: 8px;
  box-shadow: 0 8px 20px rgba(18, 20, 23, 0.18);
  height: 54px;
  width: 54px;
}

.app-title-row h3 {
  margin-bottom: 0;
}

.hero-summary {
  color: rgba(255, 255, 255, 0.84);
  font-size: clamp(1.1rem, 2.2vw, 1.45rem);
  max-width: 650px;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  align-items: center;
  border: 1px solid transparent;
  border-radius: 8px;
  display: inline-flex;
  font-weight: 800;
  gap: 9px;
  min-height: 48px;
  padding: 12px 18px;
  text-decoration: none;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.button svg {
  fill: currentColor;
  height: 19px;
  width: 19px;
}

.button:hover {
  transform: translateY(-2px);
}

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

.button.primary:hover {
  background: var(--accent-dark);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
}

.contact-section .button.secondary {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
}

.section {
  margin: 0 auto;
  max-width: 1240px;
  padding: clamp(64px, 10vw, 112px) clamp(18px, 5vw, 56px);
}

.about-grid {
  align-items: start;
  display: grid;
  gap: clamp(28px, 6vw, 72px);
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
}

.about-grid p {
  color: var(--muted);
  font-size: 1.08rem;
  margin: 12px 0 0;
}

.timeline-layout {
  display: grid;
  gap: 34px;
  grid-template-columns: 1fr;
  margin: 0 auto;
  max-width: 1180px;
  position: relative;
}

.timeline-column {
  display: grid;
  gap: 14px;
}

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

.timeline-columns {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.education-track .timeline-track-title {
  grid-column: 1 / -1;
}

.timeline-track-title {
  align-items: center;
  color: var(--accent);
  display: flex;
  font-size: 0.78rem;
  font-weight: 900;
  gap: 10px;
  text-transform: uppercase;
}

.timeline-track-title::after {
  background: currentColor;
  content: "";
  flex: 1;
  height: 1px;
  opacity: 0.32;
}

.timeline-card {
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid var(--line);
  border-left: 0;
  border-top: 4px solid var(--sage);
  border-radius: 8px;
  color: inherit;
  display: block;
  padding: 16px 18px 16px 18px;
  position: relative;
  text-decoration: none;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.timeline-card[data-icon] {
  padding-left: 88px;
}

.timeline-card[data-icon]::before {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
  content: "";
  height: 38px;
  left: 18px;
  position: absolute;
  top: 20px;
  width: 56px;
}

.timeline-card.org-psu::before {
  background-image: url("images/logo-penn-state.svg");
  background-size: 88% auto;
}

.timeline-card.org-columbia::before {
  background-image: url("images/logo-columbia-university.svg");
  background-size: 88% auto;
}

.education-track .timeline-card.org-columbia {
  padding-left: 150px;
}

.education-track .timeline-card.org-columbia::before {
  height: 58px;
  top: 18px;
  width: 108px;
}

.timeline-card.org-northrop::before {
  background-image: url("images/Northrop-Grumman-logo.png");
  background-size: 86%;
}

.timeline-card.org-wabtec::before {
  background-image: url("images/logo-wabtec.svg");
  background-size: 88% auto;
}

.timeline-card.org-doe::before {
  background-image: url("images/logo-fermilab.svg");
  background-size: 88% auto;
}

.timeline-card.org-app::before {
  background-image: url("images/plateoptimize-icon.png");
  background-size: cover;
}

.timeline-card.org-robotics::before {
  background-image: url("images/icon-robotics.svg");
}

.timeline-card.org-software::before {
  background-image: url("images/icon-software.svg");
}

.timeline-card.org-mentor::before {
  background-image: url("images/icon-mentor.svg");
}

.timeline-columns .timeline-column:nth-child(1) .timeline-card {
  border-top-color: var(--accent);
}

.timeline-columns .timeline-column:nth-child(2) .timeline-card {
  border-top-color: var(--sage);
}

.timeline-columns .timeline-column:nth-child(3) .timeline-card {
  border-top-color: var(--steel);
}

a.timeline-card:hover {
  border-color: rgba(198, 77, 53, 0.38);
  box-shadow: 0 14px 34px rgba(25, 29, 34, 0.1);
  transform: translateY(-2px);
}

.timeline-date {
  color: var(--muted);
  display: block;
  font-size: 0.78rem;
  font-weight: 850;
  margin-bottom: 7px;
  text-transform: uppercase;
}

.timeline-card h3 {
  font-size: 1.08rem;
  margin-bottom: 6px;
}

.timeline-card p {
  color: var(--muted);
  font-size: 0.94rem;
  margin: 0;
}


.section-heading {
  align-items: end;
  display: flex;
  gap: 24px;
  justify-content: space-between;
  margin-bottom: 34px;
}

.projects-section .section-heading h2 {
  font-size: clamp(2.4rem, 5.6vw, 4.1rem);
}

.filter-tabs {
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  gap: 4px;
  padding: 4px;
}

.filter-tab {
  appearance: none;
  background: transparent;
  border: 0;
  border-radius: 6px;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 0.92rem;
  font-weight: 800;
  min-height: 38px;
  padding: 8px 13px;
}

.filter-tab.active {
  background: var(--ink);
  color: var(--surface);
}

.project-grid {
  display: grid;
  gap: 22px;
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.project-group-heading {
  align-items: center;
  color: var(--accent);
  display: flex;
  font-size: 0.8rem;
  font-weight: 900;
  gap: 12px;
  grid-column: 1 / -1;
  margin: 10px 0 -4px;
  text-transform: uppercase;
}

.project-group-heading::after {
  background: currentColor;
  content: "";
  flex: 1;
  height: 1px;
  opacity: 0.28;
}

.project-group-heading.hidden {
  display: none;
}

.projects-intro {
  background: #fff;
  border: 1px solid rgba(198, 77, 53, 0.28);
  border-radius: 8px;
  color: var(--ink);
  font-size: 0.98rem;
  font-weight: 850;
  margin: -12px 0 20px;
  padding: 12px 14px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 1px 0 rgba(18, 20, 23, 0.04);
  display: flex;
  flex-direction: column;
  min-height: 100%;
  overflow: hidden;
  transition: transform 180ms ease, box-shadow 180ms ease;
  grid-column: span 2;
  scroll-margin-top: 90px;
}

.app-project {
  border-color: rgba(198, 77, 53, 0.4);
  box-shadow: 0 12px 36px rgba(198, 77, 53, 0.1);
  position: relative;
}

.project-ribbon {
  background: var(--accent);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 900;
  padding: 9px 14px;
  text-transform: uppercase;
}

.project-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.project-card.hidden {
  display: none;
}

.project-card:target {
  border-color: rgba(198, 77, 53, 0.72);
  box-shadow: 0 18px 50px rgba(198, 77, 53, 0.16);
}

.project-card.featured {
  align-items: stretch;
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: minmax(280px, 0.82fr) minmax(0, 1.18fr);
}

.project-image {
  aspect-ratio: 16 / 10;
  background: #e6e0d6;
  overflow: hidden;
}

.project-card.featured .project-image {
  align-self: start;
  aspect-ratio: auto;
  max-height: 340px;
  min-height: 230px;
}

.project-image img {
  height: 100%;
  object-fit: cover;
  width: 100%;
}

.logo-image {
  align-items: center;
  display: flex;
  justify-content: center;
  padding: 26px;
}

.logo-image img {
  height: auto;
  max-height: 150px;
  object-fit: contain;
  width: min(80%, 460px);
}

.project-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 20px;
}

.project-card.featured .project-body {
  padding: 22px 24px;
}

.app-project .project-body {
  padding: 18px 22px 22px;
}

.project-body p,
.project-body li {
  color: var(--muted);
}

.project-callout {
  color: var(--ink) !important;
  font-size: 1rem;
  font-weight: 850;
  margin-bottom: 12px;
}

.project-download-top {
  color: var(--accent);
  display: inline-block;
  font-size: 0.84rem;
  font-weight: 850;
  margin: 0 0 12px;
  text-decoration: none;
}

.project-download-top:hover {
  color: var(--accent-dark);
}

.project-body ul {
  margin: 0;
  padding-left: 18px;
}

.project-quick-list {
  display: grid;
  gap: 7px;
}

.project-body li + li,
.project-body p + p {
  margin-top: 10px;
}

.text-link {
  color: var(--accent);
  font-weight: 850;
  margin-top: auto;
  padding-top: 14px;
  text-decoration: none;
}

.text-link:hover {
  color: var(--accent-dark);
}

.project-tags,
.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
}

.project-tags {
  margin-top: 16px;
}

.project-tags span {
  background: rgba(47, 95, 127, 0.1);
  border: 1px solid rgba(47, 95, 127, 0.18);
  border-radius: 8px;
  color: var(--steel);
  font-size: 0.78rem;
  font-weight: 850;
  padding: 6px 9px;
}

.project-links {
  margin-top: 18px;
}

.project-button {
  border: 1px solid rgba(47, 95, 127, 0.24);
  border-radius: 8px;
  color: var(--steel);
  font-size: 0.82rem;
  font-weight: 850;
  line-height: 1;
  min-height: 36px;
  padding: 9px 13px;
  text-decoration: none;
}

.project-button:hover {
  border-color: rgba(198, 77, 53, 0.5);
  color: var(--accent-dark);
}

.project-button.app-store-link {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.project-button.app-store-link:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
}

.project-button.slides-link {
  background: var(--steel);
  border-color: var(--steel);
  color: #fff;
}

.project-button.slides-link:hover {
  background: var(--sage);
  border-color: var(--sage);
  color: #fff;
}

.app-preview {
  align-items: stretch;
  background: #eef0f4;
  display: flex;
  min-height: 0;
  padding: 8px;
}

.app-project .project-image {
  overflow: visible;
}

.app-preview > img {
  align-self: start;
  background: #fff;
  border: 1px solid rgba(18, 20, 23, 0.08);
  border-radius: 8px;
  box-shadow: 0 14px 35px rgba(0, 0, 0, 0.14);
  aspect-ratio: 16 / 9;
  height: auto;
  object-fit: contain;
  object-position: center;
  width: 100%;
}

.app-preview .developer-shot {
  align-self: center;
  background: #fff;
  border: 1px solid rgba(18, 20, 23, 0.08);
  border-radius: 8px;
  box-shadow: 0 14px 35px rgba(0, 0, 0, 0.14);
  overflow: hidden;
  padding: 12px 14px 10px;
  width: 100%;
}

.listing-top {
  align-items: center;
  display: flex;
  gap: 14px;
  min-height: 88px;
  padding-bottom: 10px;
}

.listing-top img {
  border-radius: 16px;
  box-shadow: 0 8px 20px rgba(18, 20, 23, 0.18);
  flex: 0 0 72px;
  height: 72px;
  width: 72px;
}

.listing-copy strong,
.listing-copy span,
.listing-copy em {
  display: block;
}

.listing-copy strong {
  color: var(--ink);
  font-size: clamp(1.45rem, 3vw, 2.15rem);
  line-height: 1;
}

.listing-copy span {
  color: #777;
  font-size: 0.92rem;
  font-weight: 800;
  margin-top: 6px;
}

.listing-copy em {
  color: #aaa;
  font-size: 0.78rem;
  font-style: normal;
  font-weight: 700;
  margin-top: 2px;
}

.listing-copy a {
  background: #007aff;
  border-radius: 999px;
  color: #fff;
  display: inline-flex;
  font-size: 0.82rem;
  font-weight: 900;
  line-height: 1;
  margin-top: 8px;
  padding: 8px 17px;
  text-decoration: none;
}

.listing-meta {
  border-top: 1px solid #e8e8e8;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 0;
  padding-top: 10px;
  text-align: center;
}

.listing-meta div {
  border-right: 1px solid #eeeeee;
}

.listing-meta div:last-child {
  border-right: 0;
}

.listing-meta span,
.listing-meta small {
  color: #999;
  display: block;
  font-weight: 750;
}

.listing-meta span {
  font-size: 0.62rem;
  text-transform: uppercase;
}

.listing-meta strong {
  color: #707070;
  display: block;
  font-size: 0.78rem;
  margin-top: 4px;
}

.listing-meta small {
  font-size: 0.66rem;
  margin-top: 2px;
}

.insect-gallery {
  background: #0d1014;
  display: grid;
  gap: 6px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-areas:
    "hero hero"
    "electronics camera"
    "prototype video";
  overflow: hidden;
  padding: 8px;
}

.project-card.featured.insect-project .project-image {
  max-height: none;
}

.insect-gallery .insect-hero-image {
  grid-area: hero;
}

.insect-gallery img:nth-of-type(2) {
  grid-area: electronics;
}

.insect-gallery img:nth-of-type(3) {
  grid-area: camera;
}

.insect-gallery img:nth-of-type(4) {
  grid-area: prototype;
}

.insect-gallery img,
.insect-gallery video {
  border-radius: 6px;
  height: auto;
  object-fit: contain;
  width: 100%;
}

.insect-gallery .insect-video {
  background: #000;
  grid-area: video;
}

.contact-panel {
  align-items: center;
  background:
    linear-gradient(135deg, rgba(82, 107, 92, 0.14), rgba(47, 95, 127, 0.12)),
    #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  gap: 28px;
  justify-content: space-between;
  padding: clamp(28px, 5vw, 54px);
}

.contact-panel h2 {
  font-size: clamp(1.8rem, 4vw, 3.6rem);
  max-width: 850px;
}

.contact-list {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.contact-list a {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  font-weight: 800;
  padding: 13px 15px;
  text-decoration: none;
}

.contact-list a:hover {
  border-color: rgba(198, 77, 53, 0.5);
  color: var(--accent-dark);
}

.contact-list span {
  color: var(--muted);
  display: block;
  font-size: 0.76rem;
  font-weight: 850;
  text-transform: uppercase;
}

.site-footer {
  align-items: center;
  border-top: 1px solid var(--line);
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  padding: 22px clamp(18px, 5vw, 56px);
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  font-weight: 800;
  text-decoration: none;
}

html.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 620ms ease, transform 620ms ease;
}

html.js .reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .hero {
    min-height: 70vh;
  }

  .hero-media {
    flex-basis: clamp(140px, 24vw, 210px);
  }

  .about-grid,
  .timeline-layout,
  .section-heading,
  .contact-panel {
    align-items: start;
    flex-direction: column;
    grid-template-columns: 1fr;
  }

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

  .project-card {
    grid-column: span 1;
  }

  .project-card.featured {
    grid-column: 1 / -1;
    grid-template-columns: 1fr;
  }

  .education-track {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .site-header {
    align-items: flex-start;
    gap: 12px;
    padding: 12px 16px;
  }

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

  .site-nav {
    gap: 14px;
  }

  .hero {
    align-items: flex-start;
    flex-direction: column-reverse;
    min-height: 72vh;
    padding-top: 72px;
  }

  .hero-media {
    flex-basis: auto;
    width: 132px;
  }

  h1 {
    font-size: clamp(3rem, 18vw, 5rem);
  }

  .filter-tabs {
    overflow-x: auto;
    width: 100%;
  }

  .filter-tab {
    flex: 1 0 auto;
  }

  .timeline-card {
    padding: 14px 15px;
  }

  .timeline-card[data-icon] {
    padding-left: 76px;
  }

  .timeline-card[data-icon]::before {
    height: 34px;
    left: 15px;
    top: 17px;
    width: 46px;
  }

  .education-track .timeline-card.org-columbia {
    padding-left: 110px;
  }

  .education-track .timeline-card.org-columbia::before {
    height: 44px;
    width: 80px;
  }

  .app-preview {
    grid-template-columns: 1fr;
  }

  .listing-top {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
    min-height: 0;
  }

  .listing-top img {
    flex-basis: auto;
    height: 96px;
    width: 96px;
  }

  .listing-copy strong {
    font-size: 1.35rem;
  }

  .listing-copy span {
    font-size: 1rem;
  }

  .listing-copy em {
    font-size: 0.88rem;
  }

  .listing-meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    text-align: left;
  }

  .listing-meta div {
    border-right: 0;
  }

  .project-grid,
  .project-card.featured {
    grid-template-columns: 1fr;
  }

  .project-card {
    grid-column: span 1;
  }

  .project-card.featured {
    grid-column: span 1;
  }

  .insect-gallery {
    grid-template-areas: none;
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }

  .insect-gallery .insect-hero-image,
  .insect-gallery img:nth-of-type(2),
  .insect-gallery img:nth-of-type(3),
  .insect-gallery img:nth-of-type(4),
  .insect-gallery .insect-video {
    grid-area: auto;
    grid-column: auto;
    grid-row: auto;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }

  html.js .reveal {
    opacity: 1;
    transform: none;
  }
}