/* header.css - light editorial masthead, wordmark, top nav, mobile hamburger. */

header {
  border-bottom: 1px solid var(--rule);
  padding: 58px 0 26px;
  background: var(--paper);
  color: var(--ink);
}
header .wrap {
  position: relative;
}
.navtoggle {
  all: unset;
  display: none;
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  cursor: pointer;
  color: var(--ink);
  padding: 8px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  z-index: 80;
}
.navtoggle:hover {
  background: var(--card);
}

h1 {
  font-family: var(--serif);
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1.08;
  margin: 0.1em 0 0.12em;
  font-weight: 560;
  letter-spacing: -0.015em;
  color: var(--ink);
}
h1 .h1ds {
  height: 0.8em;
  width: auto;
  margin-right: 0.34em;
  vertical-align: -0.06em;
  fill: var(--accent);
}
h1 .h1ds.photo {
  width: 0.8em;
  border-radius: 50%;
  object-fit: cover;
}
h1 .hl {
  color: var(--accent);
}
h1 .brand {
  display: block;
  color: var(--accent);
  letter-spacing: -0.02em;
}
h1 .tagline {
  display: block;
  font-size: 0.52em;
  font-weight: 500;
  font-style: italic;
  color: var(--dim);
  margin-top: 10px;
  line-height: 1.3;
}
.sub {
  color: var(--dim);
  font-size: 16px;
  font-style: italic;
  margin-top: 6px;
}

/* byline: small round photos + name + affiliation, paper-style, at the top */
.byline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 26px;
  margin-top: 20px;
}
.author-top {
  display: flex;
  align-items: center;
  gap: 11px;
}
.author-top img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--rule);
  background: var(--card);
}
.author-top .who {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}
.author-top .who b {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 16px;
  color: var(--ink);
}
.author-top .who .aff {
  font-family: var(--sans);
  font-size: 12.5px;
  color: var(--dim);
}

/* sticky section tabs - quiet, hairline-ruled, sans labels */
nav.tabs2 {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(1.1) blur(6px);
  border-bottom: 1px solid var(--rule);
}
nav.tabs2 .wrap {
  display: flex;
  gap: 0;
  flex-wrap: wrap;
  align-items: center;
  padding-top: 0;
  padding-bottom: 0;
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.01em;
}
.navlinks {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}
.navclose {
  display: none;
}
nav.tabs2 a {
  border: none;
  border-bottom: 2px solid transparent;
  padding: 13px 16px;
  color: var(--dim);
}
nav.tabs2 .navlinks a:first-child {
  padding-left: 16px;
  margin-left: -16px;
}
nav.tabs2 a:hover {
  color: var(--ink);
}
nav.tabs2 a.here {
  color: var(--ink);
  border-bottom-color: var(--accent);
}
nav.tabs2 a.here:hover {
  color: var(--ink);
}

/* desktop: external resources read as distinct pills, set apart from the page tabs */
@media (min-width: 601px) {
  nav.tabs2 .navlinks a.artifact,
  nav.tabs2 .navlinks a.doc,
  nav.tabs2 .navlinks a.gh {
    border: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
    border-radius: 999px;
    padding: 6px 13px;
    align-self: center;
    line-height: 1;
    transition:
      background 0.16s ease,
      color 0.16s ease,
      border-color 0.16s ease;
  }
  nav.tabs2 .navlinks a.artifact {
    margin-left: 18px;
    background: var(--accent-soft);
    color: var(--accent);
    border-color: color-mix(in srgb, var(--accent) 28%, transparent);
  }
  nav.tabs2 .navlinks a.artifact:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
  }
  nav.tabs2 .navlinks a.doc {
    margin-left: 8px;
    background: var(--accent-soft);
    color: var(--accent);
    border-color: color-mix(in srgb, var(--accent) 28%, transparent);
  }
  nav.tabs2 .navlinks a.doc:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
  }
  nav.tabs2 .navlinks a.gh {
    margin-left: 8px;
    background: var(--paper);
    color: var(--ink);
  }
  nav.tabs2 .navlinks a.gh:hover {
    background: var(--ink);
    color: #fff;
    border-color: var(--ink);
  }
}