:root {
  --bg: #f4f1e8;
  --surface: rgba(255, 255, 255, 0.78);
  --ink: #142126;
  --muted: #4a5a60;
  --brand: #0f766e;
  --brand-strong: #0c5f58;
  --accent: #d97706;
  --line: rgba(20, 33, 38, 0.16);
  --shadow: 0 20px 38px rgba(20, 33, 38, 0.08);
  --radius: 18px;
  --container: min(1080px, calc(100vw - 2.4rem));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 14%, rgba(15, 118, 110, 0.12), transparent 44%),
    radial-gradient(circle at 82% 18%, rgba(217, 119, 6, 0.13), transparent 40%),
    linear-gradient(180deg, #f7f4ec 0%, #f4f1e8 55%, #ece7dc 100%);
  font-family: 'Space Grotesk', 'Segoe UI', sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--brand-strong);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

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

.container {
  width: var(--container);
  margin: 0 auto;
}

.bg-orb {
  position: fixed;
  border-radius: 999px;
  filter: blur(18px);
  pointer-events: none;
  z-index: -1;
}

.orb-a {
  width: 280px;
  height: 280px;
  top: 70px;
  left: -80px;
  background: rgba(15, 118, 110, 0.2);
}

.orb-b {
  width: 220px;
  height: 220px;
  right: 4%;
  bottom: 12%;
  background: rgba(217, 119, 6, 0.2);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background: rgba(244, 241, 232, 0.72);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 64px;
}

.brand {
  text-decoration: none;
  color: var(--ink);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
  color: var(--ink);
  border-radius: 999px;
  padding: 0.35rem 0.72rem;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.82rem;
}

.site-nav {
  display: block;
}

.nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0.95rem;
  flex-wrap: wrap;
}

.nav-list a {
  text-decoration: none;
  color: var(--ink);
  font-size: 0.94rem;
  padding: 0.15rem 0.2rem;
  border-bottom: 2px solid transparent;
}

.nav-list a:hover {
  border-color: var(--accent);
}

main {
  padding: 2.6rem 0 4rem;
}

.hero {
  padding: 1.8rem 0 2.2rem;
}

.eyebrow {
  margin: 0;
  font-size: 0.82rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--muted);
  font-family: 'IBM Plex Mono', monospace;
}

h1 {
  margin: 0.55rem 0 1rem;
  font-size: clamp(2rem, 4.2vw, 3.4rem);
  line-height: 1.12;
}

.accent {
  color: var(--brand);
}

.hero-copy {
  max-width: 680px;
  margin: 0;
  color: var(--muted);
  font-size: 1.06rem;
}

.hero-actions {
  display: flex;
  gap: 0.85rem;
  flex-wrap: wrap;
  margin: 1.3rem 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 0.62rem 1.08rem;
  text-decoration: none;
  font-weight: 600;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
}

.btn-primary:hover {
  color: #fff;
  background: var(--brand-strong);
}

.btn-ghost {
  border-color: var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.5);
}

.tag-list {
  display: flex;
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.tag-list li {
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid var(--line);
  padding: 0.42rem 0.7rem;
  border-radius: 999px;
  font-size: 0.9rem;
}

.panel {
  margin-top: 2rem;
  padding: 1.35rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.panel-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

h2 {
  margin: 0;
  font-size: clamp(1.3rem, 2.6vw, 1.95rem);
}

.panel-head p {
  margin: 0;
  color: var(--muted);
  max-width: 460px;
}

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

.card {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
  border-radius: 14px;
  padding: 1rem;
}

.card h3,
.paper-item h3 {
  margin: 0;
  font-size: 1.12rem;
}

.card p {
  color: var(--muted);
  margin: 0.5rem 0 0.7rem;
}

.split {
  display: grid;
  gap: 0.85rem;
  grid-template-columns: 1.1fr 1fr;
}

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

.repo-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.repo-list li {
  display: grid;
  gap: 0.22rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.75rem 0.85rem;
  background: rgba(255, 255, 255, 0.72);
}

.repo-list span {
  color: var(--muted);
  font-size: 0.93rem;
}

.paper-list {
  display: grid;
  gap: 0.72rem;
}

.paper-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.85rem;
  background: rgba(255, 255, 255, 0.72);
}

.paper-item p {
  margin: 0.45rem 0;
  color: var(--muted);
}

.paper-actions {
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
}

.timeline {
  margin: 0.75rem 0 0;
  padding-left: 1rem;
}

.timeline li {
  margin-bottom: 0.45rem;
}

.download-list {
  display: grid;
  gap: 0.44rem;
}

.hint {
  margin-top: 0.72rem;
  font-size: 0.9rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}

.contact-grid a {
  text-align: center;
  padding: 0.62rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  color: var(--ink);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.1rem 1rem 1.6rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.92rem;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  animation: rise 0.7s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.reveal:nth-of-type(2) {
  animation-delay: 0.08s;
}

.reveal:nth-of-type(3) {
  animation-delay: 0.16s;
}

.reveal:nth-of-type(4) {
  animation-delay: 0.24s;
}

.reveal:nth-of-type(5) {
  animation-delay: 0.32s;
}

.reveal:nth-of-type(6) {
  animation-delay: 0.4s;
}

.reveal:nth-of-type(7) {
  animation-delay: 0.48s;
}

@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 920px) {
  .split,
  .resume-grid,
  .card-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .panel-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    padding-top: 1.2rem;
  }
}

@media (max-width: 560px) {
  .nav-wrap {
    padding: 0.4rem 0;
    min-height: 56px;
    position: relative;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .site-nav {
    display: none;
    width: 100%;
    margin-top: 0.45rem;
  }

  .site-nav.open {
    display: block;
  }

  .nav-list {
    gap: 0.42rem;
    flex-direction: column;
    padding: 0.3rem 0 0.55rem;
  }

  main {
    padding-top: 1.2rem;
  }

  .panel {
    padding: 1rem;
  }
}