/* ============================================================
   Solar System — content.css
   ------------------------------------------------------------
   Long-form pages: Formation, Exploration, Instruments.
   Everything here builds on the existing vocabulary — .panel,
   .container, .callout, .widget, .chips, .source-tag — and adds
   only what long-form reading needs that the dashboard pages
   did not: a comfortable measure, a vertical timeline, and a
   figure/credit pattern.

   Every image on these pages carries a visible credit. That is
   not decoration: the imagery is NASA/ESA/STScI material and the
   credit is a condition of use, so .figure__credit is part of
   the component, never optional.
   ============================================================ */

/* ── page scaffold ──────────────────────────────────────── */
.content-page { padding-block: clamp(96px, 12vh, 150px) clamp(48px, 8vh, 90px); }
.content-page > .panel { gap: clamp(28px, 4vw, 48px); }

.content-hero { display: grid; gap: 18px; max-width: 62ch; }
.content-hero__title {
  font-family: var(--font-serif); font-weight: 500;
  font-size: clamp(2.4rem, 6vw, 4rem); line-height: 1.02; letter-spacing: -.015em;
  text-wrap: balance;
}
.content-hero__title .accent { color: var(--accent); }
.content-hero__lead {
  color: var(--text-mid); font-size: clamp(1.04rem, 1.4vw, 1.2rem); max-width: 58ch;
}

/* ── article body — one comfortable measure ─────────────── */
.article { display: grid; gap: clamp(26px, 3.5vw, 42px); }
.article__section { display: grid; gap: 14px; max-width: 72ch; }
/* for sections that introduce a full-width block (a grid, timeline or table):
   the heading keeps the reading measure, the block it labels is free to breathe.
   Lets the content live INSIDE the section that names it, rather than as a sibling. */
.article__section--full { max-width: none; }
.article__section--full > h2,
.article__section--full > p { max-width: 72ch; }
.article__section h2 {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.35rem, 2.4vw, 1.8rem); letter-spacing: -.02em; line-height: 1.15;
}
/* Child combinators, deliberately. These have the same specificity as
   .callout h3 / .callout--fact p in planet.css but load later, so a descendant
   selector would win inside any .callout nested in an article section — giving
   the same component two different looks on sibling pages. */
.article__section > h3 {
  font-family: var(--font-display); font-weight: 600;
  font-size: 1.05rem; letter-spacing: -.01em; color: var(--text-hi);
}
.article__section > p { color: var(--text-mid); font-size: 1.02rem; }
.article__section p strong,
.article__section strong { color: var(--text-hi); font-weight: 600; }
.article__section a:not(.btn) {
  color: var(--text-hi); text-decoration: underline;
  text-underline-offset: 2px; text-decoration-color: var(--glass-brd-strong);
}
.article__section a:not(.btn):hover { text-decoration-color: var(--accent); }

/* ── figure + mandatory credit ──────────────────────────── */
.figure { display: grid; gap: 10px; margin: 4px 0; max-width: 72ch; justify-items: start; }
/* width:auto, not 100%. Several sources are legitimately small — the 1990 Pale Blue
   Dot is 453px wide — and stretching them to the column made a grainy frame worse.
   They now render at their own size and only ever scale DOWN to fit. */
.figure img {
  width: auto; max-width: 100%; height: auto; border-radius: var(--r-lg);
  border: 1px solid var(--glass-brd); background: var(--bg-deep);
  box-shadow: var(--shadow-soft);
}
.figure--wide { max-width: none; }
.figure--wide img { width: 100%; }
.figure__caption { color: var(--text-mid); font-size: .94rem; }
.figure__credit {
  color: var(--text-lo); font-size: .78rem; letter-spacing: .01em;
  display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
}
.figure__credit::before {
  content: ""; width: 5px; height: 5px; border-radius: 50%;
  background: var(--teal-400); flex: none;
}

/* ── vertical timeline (formation + exploration) ────────── */
.timeline { display: grid; gap: 0; position: relative; margin-block: 4px; }
.timeline__item {
  position: relative; display: grid; gap: 8px;
  padding: 0 0 clamp(26px, 3vw, 38px) clamp(28px, 4vw, 42px);
  border-left: 1px solid var(--glass-brd);
}
.timeline__item:last-child { border-left-color: transparent; padding-bottom: 0; }
.timeline__item::before {
  content: ""; position: absolute; left: 0; top: 6px;
  width: 11px; height: 11px; border-radius: 50%;
  transform: translateX(-6px);
  background: var(--accent); box-shadow: 0 0 12px -1px var(--accent);
}
.timeline__when {
  font-family: var(--font-ui); font-weight: 600; font-size: .78rem;
  text-transform: uppercase; letter-spacing: .08em; color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.timeline__title {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.1rem, 1.8vw, 1.3rem); letter-spacing: -.02em;
}
.timeline__body { color: var(--text-mid); font-size: 1rem; max-width: 64ch; }

/* ── "still debated" marker ─────────────────────────────────
   The site promises only real facts. Where the science is genuinely
   unsettled, saying so plainly is more honest than picking a number,
   so contested claims get a visible marker rather than silence. */
.unsettled {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 2px 9px; border-radius: var(--r-pill);
  background: rgba(245, 185, 66, .1); border: 1px solid rgba(245, 185, 66, .3);
  color: var(--accent); font-size: .74rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .06em; white-space: nowrap;
  vertical-align: middle;
}

/* ── data table ─────────────────────────────────────────────
   Wrapped in an overflow-x container: per the project's responsive
   rule, only tables, diagrams and code may exceed the measure, and
   only inside their own scroller — the page itself must never
   scroll sideways. */
.data-table-wrap { overflow-x: auto; margin-block: 4px; }
.data-table {
  width: 100%; border-collapse: collapse;
  font-size: .94rem; font-variant-numeric: tabular-nums;
}
.data-table th, .data-table td {
  text-align: left; padding: 10px 14px;
  border-bottom: 1px solid rgba(150, 205, 210, .14);
}
.data-table thead th {
  font-family: var(--font-ui); font-weight: 600; font-size: .78rem;
  text-transform: uppercase; letter-spacing: .08em; color: var(--text-lo);
  border-bottom-color: var(--glass-brd-strong); white-space: nowrap;
}
.data-table tbody th { color: var(--text-hi); font-weight: 600; white-space: nowrap; }
.data-table tbody td { color: var(--text-mid); }
.data-table tbody tr:last-child th,
.data-table tbody tr:last-child td { border-bottom: 0; }

/* ── instrument cards ───────────────────────────────────── */
.instrument-grid { display: grid; gap: clamp(18px, 2.5vw, 28px); }
.instrument {
  display: grid; gap: 16px; align-items: start;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  padding: clamp(16px, 2vw, 24px);
  background: var(--glass-fill); border: 1px solid var(--glass-brd);
  border-radius: var(--r-lg);
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.instrument:hover { border-color: var(--glass-brd-strong); background: rgba(255,255,255,.045); }
/* each card is a link target from the landing's mission dialog; clear the fixed topbar */
.instrument { scroll-margin-top: 90px; }
/* brief highlight so a deep link makes obvious which card you were sent to */
.instrument:target { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }
/* no photograph for this one — do not leave half the card empty */
.instrument--noimg { grid-template-columns: 1fr; }
.instrument__body { display: grid; gap: 10px; }
.instrument__name {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.15rem, 2vw, 1.4rem); letter-spacing: -.02em;
}
.instrument__meta {
  display: flex; flex-wrap: wrap; gap: 6px 8px; margin-top: 2px;
}
.instrument__desc { color: var(--text-mid); font-size: .98rem; }
.instrument__specs { display: grid; gap: 4px; margin-top: 2px; }
.instrument__specs div {
  display: flex; gap: 10px; justify-content: space-between;
  font-size: .88rem; padding: 5px 0;
  border-bottom: 1px dashed rgba(150, 205, 210, .14);
}
.instrument__specs .k { color: var(--text-lo); }
.instrument__specs .v {
  color: var(--text-hi); font-weight: 600; text-align: right;
  font-variant-numeric: tabular-nums;
}
.chip--live { color: var(--accent); border-color: rgba(245,185,66,.35); }
.chip--retired { color: var(--text-lo); }

/* ── cross-page navigation at the foot ──────────────────── */
.content-next {
  display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin-top: 4px;
}
.content-next a {
  display: grid; gap: 4px; padding: 16px 18px; border-radius: var(--r-md);
  background: var(--glass-fill); border: 1px solid var(--glass-brd);
  transition: border-color .25s var(--ease), background .25s var(--ease), transform .25s var(--ease);
}
.content-next a:hover {
  border-color: var(--glass-brd-strong); background: rgba(255,255,255,.05);
  transform: translateY(-2px);
}
.content-next__label {
  font-size: .74rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-lo);
}
.content-next__title { font-family: var(--font-display); font-weight: 600; font-size: 1.02rem; }

/* ── responsive ─────────────────────────────────────────── */
@media (max-width: 820px) {
  .instrument { grid-template-columns: 1fr; }
  .instrument__figure { order: -1; }
}
@media (max-width: 460px) {
  .timeline__item { padding-left: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  .instrument, .content-next a { transition: none !important; }
}