/* Cobalt + apricot visual system for the research blog. */

:root {
  --ink: #1F3A5F;
  --cobalt: #3F88C5;
  --apricot: #F4A261;
  --rust: #C44536;
  --fog: #F5F7FA;
  --paper: #FCFAF6;
  --slate: #7B8794;
}

body {
  background: var(--fog);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--ink);
}

a {
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.14em;
}

.navbar-custom {
  border-top: 0.25rem solid var(--cobalt);
  box-shadow: 0 0.15rem 0.8rem rgb(31 58 95 / 8%);
}

.intro-header {
  margin-bottom: 2.25rem;
}

.intro-header .page-heading h1 {
  letter-spacing: -0.035em;
}

.intro-header .page-heading .page-subheading {
  color: var(--slate);
  max-width: 48rem;
  margin-inline: auto;
}

.post-preview {
  background: var(--paper);
  border: 1px solid #D7E1EB;
  border-left: 0.3rem solid var(--cobalt);
  border-radius: 0.35rem;
  box-shadow: 0 0.3rem 1rem rgb(31 58 95 / 6%);
  margin-bottom: 1.5rem;
  padding: 1.4rem 1.6rem;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.post-preview:hover {
  box-shadow: 0 0.6rem 1.5rem rgb(31 58 95 / 12%);
  transform: translateY(-0.15rem);
}

.post-preview .post-title {
  color: var(--ink);
}

.post-preview .post-meta,
.post-preview .post-entry {
  color: var(--slate);
}

.post-preview .post-read-more {
  color: var(--cobalt);
  font-weight: 700;
}

.blog-tags a,
.tag-btn {
  background: #E4EEF6;
  border-radius: 999px;
  color: var(--ink);
  display: inline-block;
  padding: 0.1rem 0.55rem;
}

footer {
  border-top: 0.25rem solid var(--apricot);
}

footer .copyright {
  color: #DCE7F0;
}

::selection {
  background: var(--cobalt);
}