/* Task 074b: the frame `paper` of the satellites — a newspaper: the ticker of the day's figures, the masthead with
   the date, the top menu, one narrow column of text, a serif headline face, the chronicle of the archive.
   The colours and the fonts are the site's (web.sites.sections.style → the variables of the page). */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 18px/1.65 var(--body);
       overflow-wrap: break-word; }
img, svg { max-width: 100%; }
a { color: var(--accent); }
a:focus-visible, label:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 8px; top: 8px; background: var(--bg); padding: 6px 10px; z-index: 5; }

/* the ticker: CSS only (no script); with reduced motion it stands still and scrolls by hand */
.ticker { background: var(--fg); color: var(--bg); overflow: hidden; white-space: nowrap;
          font: 600 14px/1 var(--body); font-variant-numeric: tabular-nums; }
.ticker-track { display: inline-flex; animation: tick 70s linear infinite; }
.ticker:hover .ticker-track, .ticker:focus-within .ticker-track { animation-play-state: paused; }
.ticker ul { display: inline-flex; margin: 0; padding: 10px 0; list-style: none; }
.ticker li { padding: 0 22px 0 0; }
.ticker li::after { content: "·"; padding-left: 22px; opacity: .6; }
.ticker b { letter-spacing: .04em; }
.ticker .w { padding-left: 4px; }
@keyframes tick { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) {
  .ticker { overflow-x: auto; }
  .ticker-track { animation: none; }
  .ticker ul[aria-hidden] { display: none; }
}

.masthead { max-width: 980px; margin: 0 auto; padding: 18px 18px 0; text-align: center; }
.mh-meta { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 4px 16px; border-bottom: 1px solid
           var(--line); padding-bottom: 6px; font-size: 13px; letter-spacing: .08em; text-transform: uppercase;
           color: var(--muted); }
.mh-name { display: block; margin: 10px 0 2px; font: 900 clamp(34px, 9vw, 66px)/1.05 var(--head);
           color: var(--fg); text-decoration: none; letter-spacing: -.01em; }
.mh-tag { margin: 0 0 10px; font-style: italic; color: var(--muted); font-size: 15px; }
.topnav { border-top: 3px double var(--line); border-bottom: 1px solid var(--line); padding: 8px 0;
          display: flex; justify-content: center; flex-wrap: wrap; gap: 4px 20px; font-size: 14px;
          letter-spacing: .1em; text-transform: uppercase; }
.topnav a { color: var(--fg); text-decoration: none; }
.topnav a:hover, .topnav a[aria-current] { color: var(--accent); }

.paper { max-width: 680px; margin: 0 auto; padding: 26px 18px 48px; }
.kicker { margin: 0 0 6px; font: 700 13px/1.3 var(--body); letter-spacing: .14em; text-transform: uppercase;
          color: var(--accent); }
h1, h2, h3 { font-family: var(--head); line-height: 1.12; }
h1 { font-size: clamp(30px, 6vw, 46px); font-weight: 800; margin: 4px 0 12px; }
h2 { font-size: 26px; margin: 34px 0 10px; border-top: 1px solid var(--line); padding-top: 10px; }
h3 { font-size: 15px; margin: 30px 0 8px; font-family: var(--body); letter-spacing: .12em; text-transform: uppercase;
     border-bottom: 1px solid var(--line); padding-bottom: 4px; }
article em { color: var(--muted); }
article ul { padding-left: 20px; }
.hero { float: right; width: 200px; margin: 6px 0 14px 24px; }
.hero figcaption { font-size: 13px; color: var(--muted); text-align: center; }
.hero-sym { display: block; width: 100%; height: auto; }
.hero-sym .frame { fill: none; stroke: var(--line); stroke-width: 2; }
.hero-sym .sign { fill: var(--fg); font-family: var(--head); font-weight: 700; }
.hero-sym .arrow { fill: var(--accent); }
.hero-sym .cap { fill: var(--muted); font-family: var(--body); }
.lead { display: grid; grid-template-columns: 1fr 180px; gap: 22px; align-items: start;
        border-bottom: 3px double var(--line); padding-bottom: 18px; }
.lead h2 { border: 0; padding: 0; margin: 0 0 8px; font-size: clamp(26px, 5vw, 36px); }
.lead h2 a { color: var(--fg); text-decoration: none; }
.lead .hero { float: none; width: 180px; margin: 0; }
.earlier { list-style: none; padding: 0; margin: 0; }
.earlier li { padding: 12px 0; border-bottom: 1px solid var(--line); }
.earlier a { color: var(--fg); font: 700 20px/1.25 var(--head); text-decoration: none; }
.earlier a:hover { color: var(--accent); }
.dateline { display: block; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.meta { color: var(--muted); font-size: 15px; }
.groups a { white-space: nowrap; }
footer { border-top: 3px double var(--line); max-width: 980px; margin: 0 auto; padding: 16px 18px 34px;
         color: var(--muted); font-size: 14px; text-align: center; }
@media (max-width: 560px) {
  body { font-size: 17px; }
  .hero { float: none; width: 160px; margin: 8px auto 14px; }
  .lead { grid-template-columns: 1fr; }
  .lead .hero { width: 150px; margin: 0 auto; }
  .mh-meta { justify-content: center; }
}