/* NAYGN Acronym Database — minimal, clean styling. Replace palette when the
   real logo/brand colours arrive. */
:root {
  --nuclear-green: #2f7d32;        /* readable green for buttons / links */
  --logo-green: #32CD32;           /* exact green of the "A" in the NAYGN logo */
  --ink: #1b1b1b;
  --muted: #666;
  --line: #e0e0e0;
  --bg: #fafafa;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
}

.site-header {
  background: #fff;
  border-bottom: 2px solid var(--logo-green);
  padding: 0.75rem 1.25rem;
}
.brand { display: flex; align-items: center; gap: 0.7rem; text-decoration: none; color: var(--ink); }
.logo { height: 36px; width: auto; display: block; }
.brand-text { font-size: 1.15rem; padding-left: 0.7rem; border-left: 1px solid var(--line); }

.container { max-width: 1000px; margin: 1.5rem auto; padding: 0 1.25rem; }

.search { display: flex; flex-direction: column; gap: 0.6rem; margin-bottom: 1rem; }
.search input[type="search"] {
  width: 100%;
  padding: 0.7rem 0.9rem;
  font-size: 1.1rem;
  border: 1px solid var(--line);
  border-radius: 6px;
}
.filters { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.filters select, .filters button {
  padding: 0.55rem 0.7rem;
  font-size: 0.95rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}
.filters button { background: var(--nuclear-green); color: #fff; border-color: var(--nuclear-green); cursor: pointer; }

.meta { color: var(--muted); font-size: 0.9rem; }
.limit-warning { color: #b00020; font-weight: 700; }

table.results { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
table.results th, table.results td { text-align: left; padding: 0.55rem 0.75rem; border-bottom: 1px solid var(--line); vertical-align: top; }
table.results th { background: #f2f6f2; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--muted); }
table.results tr:last-child td { border-bottom: none; }
td.acr { font-weight: 700; white-space: nowrap; }
td.acr a { color: var(--nuclear-green); text-decoration: none; }
td.acr a:hover { text-decoration: underline; }
td.empty { text-align: center; color: var(--muted); padding: 1.5rem; }

.detail h1 { color: var(--nuclear-green); margin-bottom: 0.25rem; }
.detail .definition { font-size: 1.2rem; }
.detail dl { display: grid; grid-template-columns: max-content 1fr; gap: 0.3rem 1rem; margin: 1rem 0; }
.detail dt { font-weight: 700; color: var(--muted); }

.site-footer { text-align: center; color: var(--muted); font-size: 0.85rem; padding: 2rem 1rem; border-top: 2px solid var(--logo-green); margin-top: 2rem; }
.site-footer p { margin: 0.35rem 0; }
.site-footer a { color: var(--nuclear-green); }
.footer-notice { font-weight: 700; color: #b00020; text-transform: uppercase; letter-spacing: 0.03em; }

/* ------------------------------------------------------------------ */
/* Mobile / small screens. Below 600px the 4-column results table would
   overflow, so each row becomes a stacked "card" with field labels.   */
/* ------------------------------------------------------------------ */
@media (max-width: 600px) {
  .container { margin: 1rem auto; padding: 0 0.9rem; }
  .site-header { padding: 0.6rem 0.9rem; }
  .logo { height: 30px; }
  .brand-text { font-size: 1rem; padding-left: 0.5rem; }
  .search input[type="search"] { font-size: 1rem; }
  .filters { flex-direction: column; align-items: stretch; }
  .filters select, .filters button { width: 100%; }

  /* Turn the table into stacked cards. */
  table.results { border: none; background: transparent; }
  table.results thead { position: absolute; left: -9999px; }  /* visually hide headers */
  table.results tr {
    display: block;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 6px;
    margin-bottom: 0.75rem;
    padding: 0.4rem 0.2rem;
  }
  table.results td {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    border: none;
    padding: 0.35rem 0.75rem;
    text-align: right;
  }
  table.results td::before {
    content: attr(data-label);
    font-weight: 700;
    color: var(--muted);
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.03em;
    text-align: left;
  }
  td.acr { white-space: normal; font-size: 1.05rem; }
  td.empty { display: block; text-align: center; }
  td.empty::before { content: ""; }
}