/* clownix.net — one stylesheet, no framework, no webfont, no javascript.
   Everything is system fonts and flat colour so the pages load instantly
   and stay readable when they are twenty years old. */

:root {
  --ink:      #1a1a2e;
  --ink-soft: #55606f;
  --line:     #d9dee6;
  --band:     #f4f6fa;
  --blue:     #0f3460;
  --blue-mid: #3b6ea5;
  --accent:   #e94560;
  --code-bg:  #f2f4f8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "DejaVu Sans", Helvetica, Arial, sans-serif;
}

.wrap { max-width: 880px; margin: 0 auto; padding: 0 24px; }

/* header */
header { border-bottom: 1px solid var(--line); background: #fff; }
nav {
  max-width: 880px; margin: 0 auto; padding: 14px 24px;
  display: flex; gap: 22px; align-items: baseline; flex-wrap: wrap;
}
nav a { color: var(--ink-soft); text-decoration: none; font-size: 15px; }
nav a:hover { color: var(--blue); }
nav a.on { color: var(--ink); font-weight: 600; }
nav .brand {
  font-weight: 700; letter-spacing: 2px; color: var(--accent);
  margin-right: 8px; font-size: 17px;
}
nav .brand img { vertical-align: -6px; margin-right: 8px; }

/* hero */
.hero { max-width: 880px; margin: 0 auto; padding: 60px 24px 48px; }
.hero .logo { display: block; max-width: 100%; height: auto; margin: 0 0 22px; }
.hero h1 { font-size: 38px; line-height: 1.2; margin: 0 0 18px; letter-spacing: -0.5px; }
.lead { font-size: 19px; color: var(--ink-soft); margin: 0 0 26px; max-width: 44em; }
.cta { margin: 0 0 18px; }
.ver { color: var(--ink-soft); font-size: 14px; margin: 0; }

.btn {
  display: inline-block; padding: 10px 20px; margin: 0 10px 8px 0;
  background: var(--blue); color: #fff; text-decoration: none;
  border-radius: 5px; font-size: 15px; border: 1px solid var(--blue);
}
.btn:hover { background: #143f75; }
.btn.ghost { background: #fff; color: var(--blue); }
.btn.ghost:hover { background: var(--band); }

/* sections */
section { padding: 34px 0; }
section.top { padding-top: 40px; }
.band { background: var(--band); border-top: 1px solid var(--line);
        border-bottom: 1px solid var(--line); }

h1 { font-size: 32px; margin: 0 0 16px; }
h2 { font-size: 22px; margin: 34px 0 12px; }
h3 { font-size: 16px; margin: 0 0 8px; }
p  { margin: 0 0 14px; }
hr { border: 0; border-top: 1px solid var(--line); margin: 40px 0; }

.cols  { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.cols2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.cols p, .cols2 p { font-size: 15px; color: var(--ink-soft); }

.card { border: 1px solid var(--line); border-radius: 8px; padding: 20px 22px;
        background: #fff; }
.note { font-size: 14px !important; color: var(--blue-mid) !important;
        margin-bottom: 0 !important; }

/* code */
pre {
  background: var(--code-bg); border: 1px solid var(--line);
  border-radius: 6px; padding: 14px 16px; overflow-x: auto; margin: 0 0 16px;
}
code {
  font: 13.5px/1.6 "DejaVu Sans Mono", Menlo, Consolas, monospace;
  color: var(--blue);
}
p code { background: var(--code-bg); padding: 1px 5px; border-radius: 3px; }

/* table */
table { border-collapse: collapse; width: 100%; margin: 8px 0 16px; }
th { text-align: left; font-size: 13px; color: var(--ink-soft);
     padding: 4px 10px; font-weight: 600; }
td { border-top: 1px solid var(--line); padding: 9px 10px; font-size: 15px;
     vertical-align: top; }
td:first-child { width: 42%; color: var(--ink); }
td:last-child  { color: var(--ink-soft); }
table.course td:first-child { width: 4%; }
table.course td:nth-child(2) { width: 20%; }
table.course td:nth-child(3) { width: 40%; }

/* figures */
.fig { width: 100%; height: auto; margin: 6px 0 10px; }
.fbox { fill: #f7f8fa; stroke: var(--blue); stroke-width: 1.5; }
.facc { fill: #fdeef1; stroke: var(--accent); stroke-width: 1.5; }
.fzone { fill: #eef4ff; stroke: var(--blue-mid); stroke-width: 1.5;
         stroke-dasharray: 7 4; }
.ft { font-size: 14px; fill: var(--ink); }
.fs { font-size: 11.5px; fill: var(--ink-soft); }
.fm { font-size: 13px; font-family: "DejaVu Sans Mono", monospace;
      fill: var(--blue); }
.fz { font-size: 12px; font-weight: bold; fill: var(--blue-mid); }
.farr { stroke: var(--blue-mid); stroke-width: 2; fill: none;
        marker-end: url(#ar); }

/* the two books, sphinx body under the same header and footer */
.book section { padding: 0; }
.book pre { font: 13.5px/1.6 "DejaVu Sans Mono", Menlo, Consolas, monospace;
            color: var(--blue); }
.book img { max-width: 100%; height: auto; margin: 6px 0 10px; }
.book a { color: var(--blue-mid); }
.book h1 { margin-top: 10px; }
.book h3 { margin: 22px 0 8px; }
.book em { color: var(--blue); }
.book li { margin: 0 0 4px; }
.book li p { margin: 0; }
.book blockquote { margin: 0 0 14px; }
.book dl.field-list { display: grid; grid-template-columns: max-content auto;
                      gap: 0 12px; margin: 0 0 18px; font-size: 14px;
                      color: var(--ink-soft); }
.book dl.field-list dd { margin: 0; }
.book dl.field-list p { margin: 0; }
.book .toctree-wrapper ul { list-style: none; padding: 0; columns: 2; }
.book .toctree-wrapper li { padding: 5px 0; border-top: 1px solid var(--line);
                            margin: 0; break-inside: avoid; }
.book .toctree-wrapper a { text-decoration: none; }
.book td:first-child { width: auto; }
.book td p { margin: 0; }
.booknav { font-size: 14px; color: var(--ink-soft); margin: 0 0 22px; }
.booknav a { text-decoration: none; }
.booknav:last-child { margin: 30px 0 0; padding-top: 14px;
                      border-top: 1px solid var(--line); }

/* footer */
footer { border-top: 1px solid var(--line); padding: 26px 0; margin-top: 30px; }
footer p { font-size: 14px; color: var(--ink-soft); margin: 0; }
footer a { color: var(--blue-mid); }

/* narrow screens */
@media (max-width: 700px) {
  .cols, .cols2 { grid-template-columns: 1fr; gap: 22px; }
  .hero { padding: 40px 24px 34px; }
  .hero h1 { font-size: 30px; }
  .lead { font-size: 17px; }
  td:first-child { width: 45%; }
  .book .toctree-wrapper ul { columns: 1; }
}