html {
  box-sizing: border-box;
  font-size: 16px;
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  color: #333;
  background: #fff;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.55;
}

a {
  color: #2f7fbd;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.masthead {
  position: relative;
  border-bottom: 1px solid #f2f3f3;
  background: #fff;
  z-index: 20;
}

.masthead__inner-wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2em;
}

.greedy-nav {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.visible-links {
  display: flex;
  align-items: center;
  gap: 0;
  width: 100%;
  padding: 0;
  margin: 0;
  list-style: none;
}

.masthead__menu-item {
  white-space: nowrap;
}

.masthead__menu-item a {
  display: block;
  padding: 0.7em 1em;
  color: #4f5963;
  font-size: 0.88rem;
  font-weight: 700;
}

.masthead__menu-item--lg {
  margin-right: auto;
}

.masthead__menu-item--lg a {
  color: #222;
  font-size: 1rem;
}

#main {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 42px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 2.4em 2em 4em;
}

.sidebar {
  min-width: 0;
}

.sticky {
  position: sticky;
  top: 1.5em;
  align-self: start;
}

.profile_box {
  text-align: center;
}

.author__avatar {
  width: 160px;
  height: 160px;
  margin: 0 auto 1.2em;
}

.author__avatar img {
  display: block;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
}

.avatar-placeholder {
  display: grid;
  place-items: center;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  color: #fff;
  background: linear-gradient(135deg, #3d6f9f, #54a08b 55%, #8a8f98);
  font-size: 3rem;
  font-weight: 800;
}

.author__name {
  margin: 0 0 0.35em;
  color: #222;
  font-size: 1.24rem;
  line-height: 1.25;
}

.author__bio {
  margin: 0 0 1.2em;
  color: #555;
  font-size: 0.92rem;
}

.author__urls {
  padding: 0;
  margin: 0;
  color: #555;
  font-size: 0.88rem;
  list-style: none;
  text-align: left;
}

.author__urls li {
  margin: 0 0 0.65em;
}

.motto {
  white-space: normal;
  margin-bottom: 1em;
}

.page {
  min-width: 0;
}

.page__content {
  max-width: 860px;
}

.page__content h1 {
  padding-bottom: 0.25em;
  margin: 1.25em 0 0.7em;
  border-bottom: 1px solid #f2f3f3;
  color: #222;
  font-size: 1.55rem;
  line-height: 1.35;
}

.page__content h1:first-child {
  margin-top: 0;
}

.page__content p {
  margin: 0 0 1em;
}

.page__content ul {
  padding-left: 1.25em;
  margin-top: 0;
}

.page__content li {
  margin-bottom: 0.42em;
}

.paper-box {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 1.2em;
  padding: 1em 0;
  margin: 0 0 1.15em;
  border-bottom: 1px solid #f2f3f3;
}

.paper-box-image {
  min-width: 0;
}

.paper-box-image > div {
  position: relative;
}

.paper-box-image img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  border: 1px solid #e3e6e8;
  object-fit: cover;
}

.badge {
  position: absolute;
  top: 0.65em;
  left: 0.65em;
  z-index: 2;
  max-width: calc(100% - 1.3em);
  padding: 0.3em 0.55em;
  border-radius: 4px;
  color: #fff;
  background: rgba(0, 0, 0, 0.72);
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1.2;
}

.paper-thumb {
  display: grid;
  place-items: center;
  width: 100%;
  aspect-ratio: 4 / 3;
  border: 1px solid #e3e6e8;
  color: #fff;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0;
  text-align: center;
}

.weather {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.22), transparent 45%),
    linear-gradient(160deg, #315f9d, #66a6c8 52%, #f0b35f);
}

.diffusion {
  background:
    radial-gradient(circle at 70% 24%, rgba(255, 255, 255, 0.35), transparent 18%),
    linear-gradient(145deg, #355070, #6d597a 52%, #b56576);
}

.hsi {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.18) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 255, 255, 0.18) 1px, transparent 1px),
    linear-gradient(135deg, #2d6a4f, #52b788 50%, #d8f3dc);
  background-size: 18px 18px, 18px 18px, auto;
}

.transformer {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.18), transparent 42%),
    linear-gradient(155deg, #264653, #2a9d8f 50%, #e9c46a);
}

.medical {
  background:
    radial-gradient(circle at 34% 42%, rgba(255, 255, 255, 0.3), transparent 20%),
    linear-gradient(145deg, #5c677d, #7d8597 45%, #33415c);
}

.paper-box-text p:first-child {
  margin-bottom: 0.45em;
  font-size: 1rem;
}

.paper-box-text ul {
  margin-bottom: 0;
}

em {
  color: #555;
}

strong {
  color: #222;
}

@media (max-width: 900px) {
  .masthead__inner-wrap {
    padding: 0 1em;
  }

  .visible-links {
    overflow-x: auto;
  }

  #main {
    grid-template-columns: 1fr;
    gap: 1.8em;
    padding: 1.6em 1.1em 3em;
  }

  .sticky {
    position: static;
  }

  .author__urls {
    text-align: center;
  }

  .paper-box {
    grid-template-columns: 1fr;
  }

  .paper-box-image {
    max-width: 320px;
  }
}