/* Huang-Cheng Chou — personal site
   Direction: studio night / signal teal — academic density, not purple SaaS */

:root {
  --ink: #0c1118;
  --ink-2: #141b24;
  --fog: #e8eef4;
  --muted: #9aabbc;
  --line: rgba(232, 238, 244, 0.12);
  --accent: #3ec6b0;
  --accent-dim: rgba(62, 198, 176, 0.18);
  --warm: #d9a66a;
  --display: "Bricolage Grotesque", system-ui, sans-serif;
  --serif: "Source Serif 4", Georgia, serif;
  --space: clamp(1.25rem, 3vw, 2.5rem);
  --max: 68rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--fog);
  background: var(--ink);
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: #7be0cf;
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem clamp(1rem, 4vw, 2.5rem);
  background: linear-gradient(180deg, rgba(12, 17, 24, 0.92), rgba(12, 17, 24, 0));
  backdrop-filter: blur(2px);
}

.logo {
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--fog);
  text-decoration: none;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 1.1rem;
}

.nav a {
  font-family: var(--display);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

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

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  align-items: center;
  overflow: hidden;
  padding: 6.5rem clamp(1rem, 4vw, 2.5rem) 3.5rem;
}

.hero-visual {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  opacity: 0.55;
}

.hero-veil {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 55% 50% at 78% 42%, rgba(62, 198, 176, 0.1), transparent 58%),
    linear-gradient(180deg, rgba(12, 17, 24, 0.25) 0%, rgba(12, 17, 24, 0.62) 48%, rgba(12, 17, 24, 0.96) 100%);
  pointer-events: none;
}

.hero-layout {
  position: relative;
  z-index: 2;
  width: min(100%, var(--max));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(12rem, 0.72fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: end;
}

.hero-content {
  animation: rise 1s ease-out both;
  max-width: 40rem;
}

.eyebrow {
  font-family: var(--display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

.brand {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(2.5rem, 7.5vw, 4.8rem);
  line-height: 0.96;
  letter-spacing: -0.03em;
  margin: 0;
  color: var(--fog);
}

.brand-zh {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  letter-spacing: 0.28em;
  color: var(--muted);
  margin: 0.45rem 0 1rem;
}

.lede {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: clamp(1.02rem, 2vw, 1.2rem);
  max-width: 34rem;
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.5rem;
  align-items: center;
  font-family: var(--display);
  font-weight: 700;
  font-size: 0.95rem;
}

.link-row a {
  color: var(--fog);
  text-decoration: none;
  padding: 0.2rem 0.35rem;
  border-radius: 0.35rem;
  transition: color 0.2s ease, background 0.2s ease;
}

.link-row a:hover {
  color: var(--accent);
  background: var(--accent-dim);
}

.link-row span {
  color: var(--muted);
  font-weight: 500;
}

.hero-photo {
  margin: 0;
  justify-self: end;
  width: min(100%, 22rem);
  animation: rise 1.15s ease-out 0.12s both;
}

.hero-photo img {
  display: block;
  width: 100%;
  height: auto;
  max-height: min(72vh, 36rem);
  object-fit: contain;
  object-position: center top;
  border-radius: 0.35rem;
  box-shadow:
    0 0 0 1px rgba(232, 238, 244, 0.1),
    0 28px 60px rgba(0, 0, 0, 0.45);
  filter: saturate(0.92) contrast(1.04);
  background: rgba(20, 27, 36, 0.55);
}

.hero-scroll {
  position: absolute;
  right: clamp(1rem, 4vw, 2.5rem);
  bottom: 1.75rem;
  z-index: 2;
  font-family: var(--display);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  animation: pulse 2.4s ease-in-out infinite;
}

/* Sections */
.section {
  padding: clamp(3.5rem, 8vw, 6rem) clamp(1rem, 4vw, 2.5rem);
  border-top: 1px solid var(--line);
}

.section-inner {
  max-width: var(--max);
  margin: 0 auto;
}

.section h2 {
  font-family: var(--display);
  font-size: clamp(1.7rem, 3.8vw, 2.4rem);
  font-weight: 750;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

.section-lead {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 44rem;
  margin: 0 0 1.35rem;
}

.about p {
  max-width: 46rem;
  margin: 0 0 1.05rem;
  color: #c5d0db;
}

.about strong {
  color: var(--fog);
  font-weight: 600;
}

.meta-list {
  margin: 2rem 0 0;
  padding: 0;
  max-width: 46rem;
  border-top: 1px solid var(--line);
}

.meta-list > div {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 0.75rem 1.25rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--line);
}

.meta-list dt {
  font-family: var(--display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0;
}

.meta-list dd {
  margin: 0;
  color: #c5d0db;
  font-size: 1.02rem;
}

.news-list {
  margin: 0.5rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: news;
  max-width: 48rem;
}

.news-list li {
  counter-increment: news;
  position: relative;
  padding: 1rem 0 1rem 2.4rem;
  border-top: 1px solid var(--line);
  color: #c5d0db;
}

.news-list li::before {
  content: counter(news) ".";
  position: absolute;
  left: 0;
  top: 1rem;
  font-family: var(--display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
}

.news-list em {
  font-style: italic;
  color: var(--fog);
}

.feature {
  margin: 1.5rem 0 2.25rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--line);
}

.project-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}

.project {
  padding: 1.5rem 1.35rem 1.5rem 0;
  border-bottom: 1px solid var(--line);
}

.project:nth-child(even) {
  padding-left: 1.35rem;
  border-left: 1px solid var(--line);
}

.project-wide {
  grid-column: 1 / -1;
  padding-left: 0;
  border-left: none;
}

.project h3 {
  font-family: var(--display);
  font-size: 1.35rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
  color: var(--fog);
}

.project > p {
  margin: 0 0 0.75rem;
  color: var(--muted);
  max-width: 40rem;
}

.project-pubs {
  list-style: none;
  margin: 0;
  padding: 0;
}

.project-pubs li {
  position: relative;
  padding: 0.28rem 0 0.28rem 0.9rem;
  color: #c5d0db;
  font-size: 0.95rem;
  line-height: 1.45;
}

.project-pubs li::before {
  content: "–";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.award-list {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
  max-width: 46rem;
}

.award-list li {
  padding: 0.95rem 0;
  border-top: 1px solid var(--line);
  color: #c5d0db;
}

.award-list strong {
  color: var(--fog);
  font-family: var(--display);
  font-weight: 700;
}

.section-note {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.feature-kicker {
  font-family: var(--display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--warm);
  margin: 0 0 0.35rem;
}

.feature h3,
.work-grid h3 {
  font-family: var(--display);
  font-size: 1.45rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}

.feature h3 a {
  color: var(--fog);
  text-decoration: none;
}

.feature h3 a:hover {
  color: var(--accent);
}

.feature p,
.work-grid p {
  margin: 0;
  color: var(--muted);
  max-width: 40rem;
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.75rem 2.25rem;
}

.work-grid h3 {
  color: var(--fog);
}

.text-link {
  display: inline-block;
  margin-top: 1rem;
  font-family: var(--display);
  font-weight: 700;
  text-decoration: none;
}

.pubs-subhead {
  font-family: var(--display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--warm);
  margin: 1.75rem 0 0.35rem;
}

.pub-list {
  list-style: none;
  margin: 0 0 0.5rem;
  padding: 0;
  counter-reset: pub;
}

.pub-list-continued {
  counter-reset: pub 7;
}

.pub-list li {
  counter-increment: pub;
  position: relative;
  padding: 1.15rem 0 1.15rem 2.35rem;
  border-top: 1px solid var(--line);
}

.pub-list li::before {
  content: counter(pub) ".";
  position: absolute;
  left: 0;
  top: 1.2rem;
  font-family: var(--display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
}

.pub-title {
  display: block;
  color: var(--fog);
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.pub-authors,
.pub-venue {
  display: block;
  color: var(--muted);
  font-size: 0.98rem;
}

.pub-authors strong {
  color: var(--fog);
  font-weight: 700;
}

.pub-venue {
  margin-top: 0.15rem;
  font-family: var(--display);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #8fa3b5;
}

.pub-links {
  display: block;
  margin-top: 0.35rem;
  font-family: var(--display);
  font-size: 0.85rem;
  font-weight: 700;
}

.project-fig {
  margin: 0.65rem 0 1rem;
  padding: 0.55rem;
  border-radius: 0.65rem;
  background: rgba(232, 238, 244, 0.035);
  border: 1px solid var(--line);
}

.project-fig img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 11.5rem;
  margin: 0 auto;
  object-fit: contain;
  object-position: center;
  border-radius: 0.4rem;
  background: transparent;
}

.project-fig figcaption {
  margin-top: 0.55rem;
  padding: 0 0.15rem;
  font-family: var(--display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  line-height: 1.35;
  text-align: center;
}

.project-wide .project-fig img {
  max-height: 11.5rem;
}

.timeline .role {
  display: flex;
  align-items: center;
  gap: 0.95rem;
}

.org-logo {
  width: 4.25rem;
  height: 4.25rem;
  flex-shrink: 0;
  object-fit: contain;
  border-radius: 0.55rem;
  padding: 0.28rem;
  box-sizing: border-box;
  border: 1px solid rgba(232, 238, 244, 0.16);
}

.org-logo--light {
  background: #ffffff;
}

.org-logo--dark {
  background: #ffffff;
}

.timeline {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
}

.timeline li {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 1rem;
  padding: 1.05rem 0;
  border-top: 1px solid var(--line);
}

.timeline .when {
  font-family: var(--display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
}

.timeline strong {
  display: block;
  font-family: var(--display);
  font-size: 1.05rem;
  color: var(--fog);
}

.timeline span {
  color: var(--muted);
  font-size: 1rem;
}

.contact-email {
  font-family: var(--display);
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  font-weight: 700;
  margin: 0 0 1.35rem;
}

.contact-email a {
  color: var(--fog);
  text-decoration: none;
}

.contact-email a:hover {
  color: var(--accent);
}

.socials {
  display: flex;
  flex-wrap: wrap;
  gap: 1.15rem;
}

.socials a {
  font-family: var(--display);
  font-weight: 700;
  color: var(--muted);
  text-decoration: none;
}

.socials a:hover {
  color: var(--accent);
}

.site-footer {
  padding: 2rem clamp(1rem, 4vw, 2.5rem) 3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.95rem;
}

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

.site-footer a:hover {
  color: var(--accent);
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.35;
  }
  50% {
    opacity: 0.9;
  }
}

@media (max-width: 900px) {
  .hero-layout {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .hero-photo {
    order: -1;
    justify-self: start;
    width: min(100%, 16rem);
  }

  .hero {
    align-items: start;
    padding-top: 5.75rem;
  }
}

@media (max-width: 800px) {
  .nav {
    gap: 0.7rem;
  }

  .nav a {
    font-size: 0.7rem;
  }

  .work-grid,
  .project-list {
    grid-template-columns: 1fr;
  }

  .project:nth-child(even) {
    padding-left: 0;
    border-left: none;
  }

  .timeline li,
  .meta-list > div {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero-content,
  .hero-photo,
  .hero-scroll,
  .reveal {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}