/* NRC.gov interior page, matched to the September 2026 theme.
   Source Sans is the face named in the NRC stylesheet. */
@font-face {
  font-family: "Source Sans 3";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: local("Source Sans 3"), local("Source Sans Pro");
}
@font-face {
  font-family: "Source Sans 3";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: local("Source Sans 3 Semibold"), local("Source Sans Pro Semibold");
}
@font-face {
  font-family: "Source Sans 3";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: local("Source Sans 3 Bold"), local("Source Sans Pro Bold");
}

:root {
  --ink: #1b1b1b;
  --muted: #3d4551;
  --blue: #005ea2;
  --navy-bottom: #014787;
  --navy-top: #001121;
  --teal: #0e816e;
  --line: #dfe1e2;
  --ice: #e1f7ff;
  --paper: #f0f0f0;
  --search: #e6e9f0;
  --max: 72rem;
  --font: "Source Sans 3", "Source Sans Pro", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: var(--font);
  font-size: 1.06rem;
  line-height: 1.5;
}
::selection { background: var(--ice); color: var(--ink); }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }
.skip {
  position: absolute;
  left: 0.5rem;
  top: -4rem;
  background: #fff;
  color: var(--blue);
  padding: 0.5rem 0.75rem;
  z-index: 20;
}
.skip:focus { top: 0.5rem; }

.proto {
  background: #1b1b1b;
  color: #fff;
  font-size: 0.95rem;
  line-height: 1.4;
}
.proto__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.7rem 1rem 0.8rem;
}
.proto strong { font-weight: 700; }
.proto a { color: #9bd4e8; }
.proto__links { margin: 0.35rem 0 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 0.35rem 1rem; }
.proto__links a[aria-current="page"] { color: #fff; text-decoration: none; font-weight: 700; }

.banner {
  background: #f0f0f0;
  font-size: 0.93rem;
  color: var(--ink);
}
.banner summary {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.45rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  list-style: none;
}
.banner summary::-webkit-details-marker { display: none; }
.banner summary .how { color: var(--blue); text-decoration: underline; }
.banner__panel {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1rem 0.7rem;
  display: grid;
  gap: 0.75rem;
}
.banner__panel p { margin: 0; max-width: 40rem; }
@media (min-width: 48rem) {
  .banner__panel { grid-template-columns: 1fr 1fr; }
}

.mast {
  background: linear-gradient(0deg, var(--navy-bottom) 0%, var(--navy-top) 100%);
  color: #fff;
}
.mast__inner {
  max-width: calc(1512px + 2rem);
  margin: 0 auto;
  padding: 0.85rem 1rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.mast__logo { display: block; line-height: 0; }
.mast__logo img { height: 52px; width: auto; display: block; }
.search {
  display: flex;
  height: 44px;
  border: 2px solid var(--teal);
  border-radius: 6px;
  background: var(--search);
  overflow: hidden;
  width: min(22rem, 46vw);
}
.search input {
  flex: 1;
  border: 0;
  background: transparent;
  color: #2d2d2d;
  font: 600 1rem/1 var(--font);
  padding: 0 0.75rem;
  min-width: 0;
}
.search input::placeholder { color: #2d2d2d; font-weight: 600; }
.search button {
  border: 0;
  background: var(--teal);
  color: #fff;
  font: 700 0.95rem/1 var(--font);
  padding: 0 0.9rem;
  cursor: pointer;
}
.search button:hover, .search button:focus-visible { background: #0a6658; }

.site-nav {
  background: #fff;
  border-top: 1px solid #fff;
  border-bottom: 1px solid var(--line);
}
.site-nav__inner {
  max-width: calc(1512px + 2rem);
  margin: 0 auto;
  padding: 0 0.4rem;
  display: flex;
  flex-wrap: nowrap;
}
.site-nav a {
  color: #3d4551;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.92rem;
  line-height: 1.15;
  padding: 0.85rem 0.5rem 0.7rem;
  position: relative;
  white-space: nowrap;
}
.site-nav a:hover { color: var(--blue); text-decoration: underline; text-underline-offset: 0.15em; }
.site-nav a:hover::after, .site-nav a:focus-visible::after {
  content: "";
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 0;
  height: 0.25rem;
  background: var(--blue);
}

.hero { position: relative; background: #01284d; color: #fff; }
.hero__img { display: block; width: 100%; height: auto; }
.hero__crumb {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.65rem 1rem;
}
.hero__crumb ol { list-style: none; display: flex; gap: 0.4rem; margin: 0; padding: 0; font-size: 0.95rem; text-shadow: 0 1px 2px rgba(0,0,0,0.6); }
.hero__crumb a { color: #fff; }
.hero__crumb li:not(:last-child)::after { content: "›"; margin-left: 0.4rem; }
.hero__title {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.85rem 1rem 1rem;
}
.hero h1 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  line-height: 1.1;
  font-weight: 700;
}

.layout {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
  display: grid;
  grid-template-columns: 15rem 1fr;
  gap: 2rem;
}
.sidenav { margin: 0; padding: 0; list-style: none; border-bottom: 1px solid var(--line); }
.sidenav a, .sidenav span {
  display: block;
  padding: 0.7rem 0.25rem;
  border-top: 1px solid var(--line);
  text-decoration: none;
}
.sidenav a { color: var(--blue); }
.sidenav .is-current { color: var(--blue); font-weight: 700; }

.prose h2 {
  color: var(--ink);
  font-size: 1.7rem;
  line-height: 1.2;
  font-weight: 700;
  margin: 2rem 0 0.6rem;
}
.prose h2::after {
  content: "";
  display: block;
  width: 8.5rem;
  height: 3px;
  background: var(--navy-bottom);
  border-radius: 2px;
  margin-top: 0.45rem;
}
.prose h3 { font-size: 1.25rem; line-height: 1.3; margin: 1.25rem 0 0.35rem; }
.prose p, .prose li { max-width: 68ch; }
.prose a { color: var(--blue); }
.prose .onpage { margin: 0 0 1.25rem; padding-left: 1.2rem; }
.rule {
  background: var(--ice);
  color: var(--ink);
  padding: 1.1rem 1.25rem;
  margin: 0 0 1.25rem;
}
.rule p { margin: 0; max-width: 68ch; }
.rule p + p { margin-top: 0.6rem; }

.doors { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 0.5rem 0 0.5rem; }
.door {
  display: block;
  border: 1px solid var(--line);
  padding: 1rem 1.1rem 1.1rem;
  text-decoration: none;
  color: var(--ink);
  background: #fff;
}
.door:hover { border-color: var(--blue); }
.door strong { display: block; color: var(--blue); font-size: 1.2rem; line-height: 1.25; margin-bottom: 0.35rem; }
.door span { display: block; max-width: 40ch; }

.record {
  border-top: 1px solid var(--line);
  padding: 0.9rem 0 0.3rem;
}
.record h3 { margin-top: 0; }
.record dl, .files dl { display: grid; grid-template-columns: 9.5rem 1fr; gap: 0.15rem 0.75rem; margin: 0.3rem 0 0.8rem; max-width: 44rem; }
.record dt, .files dt { color: var(--muted); }
.record dd, .files dd { margin: 0; }
.tag {
  display: inline-block;
  border: 1px solid var(--navy-bottom);
  color: var(--navy-bottom);
  font-weight: 700;
  font-size: 0.92rem;
  padding: 0.05rem 0.4rem;
}

.files { list-style: none; margin: 0.4rem 0 0; padding: 0; max-width: 46rem; }
.files li { border-top: 1px solid var(--line); padding: 0.75rem 0; }
.files li:last-child { border-bottom: 1px solid var(--line); }
.files a { font-weight: 700; }
.meta { display: block; color: var(--muted); font-size: 0.95rem; }

table.cases { width: 100%; border-collapse: collapse; margin: 0.6rem 0 1rem; font-size: 1rem; }
table.cases th, table.cases td { text-align: left; vertical-align: top; padding: 0.55rem 0.6rem; border-bottom: 1px solid var(--line); }
table.cases th { background: var(--paper); font-weight: 700; }
table.cases tbody tr:nth-child(odd) td { background: #f7f7f7; }
table.cases th { background: #e6e9f0; }

.status { list-style: none; margin: 0.4rem 0 0; padding: 0; max-width: 46rem; }
.status li { display: grid; grid-template-columns: 8.5rem 1fr; gap: 0.75rem; border-top: 1px solid var(--line); padding: 0.7rem 0; }
.status li:last-child { border-bottom: 1px solid var(--line); }
.state { font-weight: 700; color: var(--navy-bottom); }

.note { color: var(--muted); max-width: 68ch; }
.reviewed { margin-top: 2rem; color: var(--muted); font-size: 0.95rem; }

.foot {
  background: linear-gradient(180deg, var(--navy-bottom) 0%, var(--navy-top) 100%);
  color: #fff;
}
.foot a { color: #fff; }
.foot__top { max-width: var(--max); margin: 0 auto; padding: 0.8rem 1rem 0; }
.foot__main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1rem 1.6rem;
  display: flex;
  gap: 1rem;
  align-items: center;
}
.foot__main img { width: 72px; height: 72px; }
.foot__main p { margin: 0.15rem 0; }
.foot h2 { font-size: 1.15rem; margin: 0; font-weight: 700; }

@media (max-width: 62rem) {
  .site-nav { overflow-x: auto; }
  .site-nav a { font-size: 0.9rem; padding: 0.7rem 0.55rem 0.6rem; }
}
@media (max-width: 52rem) {
  .layout { grid-template-columns: 1fr; gap: 1rem; }
  .doors { grid-template-columns: 1fr; }
  .mast__inner { flex-wrap: wrap; }
  .mast__logo img { height: 40px; }
  .search { width: 100%; }
  .status li, .record dl { grid-template-columns: 1fr; gap: 0.1rem; }
  table.cases { display: block; overflow-x: auto; }
}