/* SymCE project page.
   One column, black on white, hairline rules, no decoration. */

:root {
  --bg:     #ffffff;
  --fg:     #000000;
  --mid:    #555555;
  --faint:  #888888;
  --rule:   #000000;
  --hair:   #d0d0d0;
  --tint:   #f4f4f4;
  --link:   #1a4b8c;
  --col:    40rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:    #0d0d0d;
    --fg:    #ededed;
    --mid:   #a8a8a8;
    --faint: #7d7d7d;
    --rule:  #ededed;
    --hair:  #333333;
    --tint:  #1a1a1a;
    --link:  #8ab4e8;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

.col {
  max-width: var(--col);
  margin: 0 auto;
  padding: 0 1.25rem;
}

a { color: var(--link); text-underline-offset: 2px; }

/* --------------------------------------------------------------- masthead */

header { padding: 3.5rem 0 0; }

h1 {
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0 0 0.35rem;
}

h1 .sub { display: block; font-weight: 400; color: var(--mid); }

.byline {
  margin: 1rem 0 0.25rem;
  font-size: 0.95rem;
}

.byline sup { font-size: 0.7em; color: var(--faint); }

.meta {
  margin: 0 0 1.4rem;
  font-size: 0.85rem;
  color: var(--mid);
}

.meta span { display: block; }

nav.res {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border: 1px solid var(--rule);
  margin-bottom: 2.5rem;
}

nav.res a {
  flex: 1 1 auto;
  text-align: center;
  padding: 0.5rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--fg);
  text-decoration: none;
  border-right: 1px solid var(--rule);
  white-space: nowrap;
}

nav.res a:last-child { border-right: 0; }
nav.res a:hover { background: var(--fg); color: var(--bg); }
nav.res a[aria-disabled="true"] { color: var(--faint); pointer-events: none; }

/* --------------------------------------------------------------- sections */

section { margin-bottom: 2.75rem; }

h2 {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  margin: 0 0 0.9rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--rule);
}

p { margin: 0 0 0.9rem; }

.tldr { font-size: 1.05rem; }

strong { font-weight: 700; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.86em;
}

pre {
  background: var(--tint);
  border: 1px solid var(--hair);
  padding: 0.85rem 1rem;
  overflow-x: auto;
  margin: 0 0 0.9rem;
  font-size: 0.8rem;
  line-height: 1.6;
}

pre code { font-size: inherit; }
.dim { color: var(--faint); }

/* --------------------------------------------------------------- figures */

figure { margin: 0 0 1rem; }

figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--hair);
  background: #fff;
}

figcaption {
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--mid);
  margin-top: 0.5rem;
}

/* --------------------------------------------------------------- tables */

.scroll { overflow-x: auto; margin-bottom: 0.6rem; }

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}

th, td { padding: 0.3rem 0.55rem; text-align: right; }
th:first-child, td:first-child { text-align: left; white-space: nowrap; }

thead th {
  font-weight: 600;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

tbody tr:last-child td { border-bottom: 1px solid var(--rule); }
tr.gap td { padding-top: 0.75rem; }
td.in { padding-left: 1.4rem; }
td.hi { font-weight: 700; }

.note { font-size: 0.78rem; color: var(--mid); margin: 0 0 0.9rem; }

/* --------------------------------------------------------------- figures */

dl.facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(7.5rem, 1fr));
  gap: 0.9rem 1.25rem;
  margin: 0 0 1rem;
}

dl.facts dt {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

dl.facts dd {
  margin: 0;
  font-size: 0.78rem;
  color: var(--mid);
}

/* --------------------------------------------------------------- footer */

footer {
  border-top: 1px solid var(--rule);
  padding: 1.25rem 0 3rem;
  font-size: 0.78rem;
  color: var(--mid);
}

footer p { margin: 0 0 0.4rem; }

@media (max-width: 34rem) {
  header { padding-top: 2rem; }
  nav.res a { flex: 1 1 45%; border-bottom: 1px solid var(--rule); }
}