/* ---------- Reset ---------- */
* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

/* ---------- Base ---------- */
body {
  background: #faf9f6;
  color: #22262b;
  font-family: 'Inter', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: #cddcf5;
}

a {
  color: #2455a4;
  text-decoration: none;
}

a:hover {
  color: #17335e;
  text-decoration: underline;
}

/* ---------- Page layout ---------- */
.page {
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  align-items: flex-start;
}

/* ---------- Sidebar ---------- */
.sidebar {
  width: 280px;
  flex: 0 0 280px;
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: 1px solid #e6e3db;
  padding: 56px 32px 40px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.avatar {
  width: 132px;
  height: 132px;
  border-radius: 50%;
  object-fit: cover;
  background: #e6e3db;
}

.name {
  font-family: 'Newsreader', serif;
  font-size: 26px;
  font-weight: 600;
  color: #17335e;
  margin: 0;
}

.title {
  font-size: 14px;
  line-height: 1.5;
  color: #6b6f76;
  margin: 0;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.nav a {
  font-size: 14px;
  font-weight: 500;
  color: #22262b;
}

.nav a:hover {
  color: #17335e;
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 24px;
  font-size: 13px;
  color: #6b6f76;
}

.sidebar-footer a {
  color: #6b6f76;
}

.sidebar-footer a:hover {
  color: #17335e;
}

.sidebar-footer .dot {
  color: #d8d4c8;
  margin: 0 8px;
}

/* ---------- Main column ---------- */
.main {
  flex: 1;
  min-width: 0;
  padding: 64px 56px 120px 64px;
}

section {
  margin-bottom: 76px;
}

section:last-of-type {
  margin-bottom: 0;
}

.eyebrow {
  font-family: 'Newsreader', serif;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #2455a4;
  margin: 0 0 22px;
}

/* ---------- About ---------- */
#about p {
  font-size: 17px;
  line-height: 1.75;
  color: #33383f;
  max-width: 640px;
  margin: 0 0 20px;
}

.about-columns {
  display: flex;
  gap: 56px;
  margin-top: 36px;
  flex-wrap: wrap;
}

.about-col {
  min-width: 220px;
}

.label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #8b8f96;
  font-weight: 600;
  margin: 0 0 12px;
}

.plain-list {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 15px;
  line-height: 2;
  color: #33383f;
}

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

.edu-list li {
  margin-bottom: 14px;
}

.edu-list li:last-child {
  margin-bottom: 0;
}

.degree {
  display: block;
  font-size: 15px;
  font-weight: 500;
  color: #22262b;
}

.institution {
  display: block;
  font-size: 14px;
  color: #6b6f76;
}

/* ---------- Research ---------- */
.pub-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.pub {
  padding: 22px 0;
  border-bottom: 1px solid #ece9e1;
}

.pub:first-child {
  padding-top: 0;
}

.pub:last-child {
  border-bottom: none;
}

.pub-title {
  font-size: 16.5px;
  font-weight: 600;
  color: #17335e;
  line-height: 1.45;
  margin: 0;
}

.arxiv-link {
  font-size: 13px;
  font-weight: 500;
  margin-left: 6px;
  white-space: nowrap;
}

.pub-venue {
  font-size: 13.5px;
  color: #6b6f76;
  margin: 5px 0 0;
}

.pub-authors {
  font-size: 14px;
  color: #33383f;
  line-height: 1.6;
  margin: 6px 0 0;
}

.pub-authors strong {
  color: #17335e;
  font-weight: 600;
}

/* ---------- Contact ---------- */
.contact-line {
  font-size: 16px;
  line-height: 2;
  color: #33383f;
  margin: 0;
}

/* ---------- Responsive (mobile-first collapse) ---------- */
@media (max-width: 860px) {
  .page {
    flex-direction: column;
  }

  .sidebar {
    position: relative;
    width: 100%;
    height: auto;
    flex: none;
    border-right: none;
    border-bottom: 1px solid #e6e3db;
    padding: 32px 24px;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
  }

  .avatar {
    width: 64px;
    height: 64px;
  }

  .name {
    font-size: 20px;
  }

  .title {
    width: 100%;
    order: 3;
  }

  .nav {
    flex-direction: row;
    gap: 18px;
    order: 4;
    width: 100%;
  }

  .sidebar-footer {
    margin-top: 0;
    padding-top: 0;
    order: 2;
    margin-left: auto;
  }

  .main {
    padding: 40px 24px 80px;
  }

  section {
    margin-bottom: 56px;
  }

  .about-columns {
    gap: 32px;
  }
}

@media (max-width: 480px) {
  .sidebar {
    flex-direction: column;
    align-items: flex-start;
  }

  .sidebar-footer {
    margin-left: 0;
  }

  #about p {
    font-size: 16px;
  }
}