/* =============================================================================
   The Pulse — newspaper front page on the Deck design system.
   Layout grammar: docs/reference/pulse_layout_rules.md — the page is a stack
   of bands (lead package + side column, then one band per category) built
   from fixed slots. The slot decides style + imagery, never the article.
   Tone (rules §6): hairlines, ink headlines, one accent (--sky); no gradients
   on article cards, minimal ornament — reads like a paper, not a dashboard.
   ========================================================================== */

.pulse {
  grid-column: 1 / -1;
  display: grid;
  gap: calc(var(--gap) * 1.5);
  align-content: start;
}

/* ---- Masthead ------------------------------------------------------------ */
.pulse-mast {
  display: grid;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--ink);
}
.pulse-mast h1 {
  margin: 0;
  font-size: var(--fs-hero);
  letter-spacing: .01em;
}
.pulse-mast-row {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}
.pulse-kicker { margin: 0; color: var(--ink-60); font-size: var(--fs-md); }

.pulse-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.pulse-chip {
  transition: background var(--t-fast) var(--ease-out),
              color var(--t-fast) var(--ease-out),
              transform var(--t-fast) var(--ease-out);
}
.pulse-chip:hover { transform: translateY(-2px); }
.pulse-chip.is-on { background: var(--ink); color: #fff; }

/* ---- Shared card anatomy -------------------------------------------------- */
.pcard {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-1);
  overflow: hidden;
  color: inherit;
  transition: transform var(--t-fast) var(--ease-out),
              box-shadow var(--t-fast) var(--ease-out);
  will-change: transform;
}
.pcard:hover { transform: translateY(-3px); box-shadow: var(--shadow-2); }
.pcard:active { transform: translateY(-1px); }

.pcard-media {
  display: block;
  overflow: hidden;
  background: var(--sky-soft);
}
.pcard-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--t-med) var(--ease-out);
}
.pcard:hover .pcard-media img { transform: scale(1.03); }
/* Image slot degrading to text (no publisher photo / broken image, rules §3) */
.pcard--noimg .pcard-media { display: none; }

.pcard-body {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 14px 16px 15px;
}
.pcard-title {
  font-weight: 700;
  line-height: 1.3;
  font-size: var(--fs-md);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.pcard-sum {
  color: var(--ink-60);
  font-size: var(--fs-sm);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.pcard-meta {
  margin-top: auto;
  padding-top: 4px;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--ink-40);
  display: flex;
  align-items: center;
  gap: 5px;
  flex-wrap: wrap;
}
.pcard-src { color: var(--sky-deep); font-weight: 700; text-transform: uppercase; letter-spacing: .06em; }
.pcard-out {
  margin-left: auto;
  color: var(--sunrise-deep);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity var(--t-fast) var(--ease-out),
              transform var(--t-fast) var(--ease-out);
  white-space: nowrap;
}
.pcard:hover .pcard-out, .pside-top:hover .pcard-out,
.pside-row:hover .pcard-out, .pband-item:hover .pcard-out {
  opacity: 1; transform: none;
}
.arrow { display: inline-block; transition: transform var(--t-fast) var(--ease-out); }

/* ==== Band 0 — lead package + side column (rules §2) ======================= */
.pulse-lead {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: var(--gap);
  align-items: start;
}
.pulse-lead-main { display: grid; gap: var(--gap); }

/* hero slot — the one big photo story */
.pcard--hero { border-radius: var(--r-lg); box-shadow: var(--shadow-2); }
.pcard--hero .pcard-media { aspect-ratio: 16 / 9; }
.pcard--hero .pcard-body { padding: 18px 22px 20px; gap: 9px; }
.pcard--hero .pcard-title {
  font-size: var(--fs-xl);
  line-height: 1.22;
  -webkit-line-clamp: 3;
}
.pcard--hero .pcard-sum { font-size: var(--fs-md); -webkit-line-clamp: 3; }
.pcard--hero.pcard--noimg .pcard-body { padding-top: 24px; }
.pcard--hero.pcard--noimg .pcard-title { font-size: var(--fs-hero); }

/* lead-under slots — two text stories beneath the hero */
.pulse-lead-under {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
}
.pcard--under { border-top: 3px solid var(--sky); }
.pcard--under .pcard-body { padding: 13px 15px 14px; }

/* side column — one white card: image-top story + hairline-divided rows */
.pulse-sidecol {
  padding: 0;
  display: grid;
  align-content: start;
}
.pside-top {
  display: block;
  color: inherit;
  border-bottom: 1.5px solid rgba(31, 61, 69, .12);
}
.pside-top-media {
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--sky-soft);
}
.pside-top-media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform var(--t-med) var(--ease-out);
}
.pside-top:hover .pside-top-media img { transform: scale(1.03); }
.pside-top--noimg .pside-top-media { display: none; }
.pside-top-title {
  display: block;
  font-weight: 700;
  font-size: var(--fs-lg);
  line-height: 1.3;
  padding: 13px 16px 2px;
}
.pside-top .pcard-meta { padding: 0 16px 13px; }

.pside-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px 16px;
  color: inherit;
  transition: background var(--t-fast) var(--ease-out);
}
.pside-row + .pside-row { border-top: 1.5px solid rgba(31, 61, 69, .10); }
.pside-row:hover { background: var(--mist); }
.pside-row-text { display: grid; gap: 5px; min-width: 0; flex: 1; }
.pside-row-title {
  font-weight: 700;
  font-size: var(--fs-sm);
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.pside-row-thumb {
  flex: 0 0 72px;
  height: 72px;
  border-radius: var(--r-sm);
  overflow: hidden;
  background: var(--sky-soft);
}
.pside-row-thumb img { width: 100%; height: 100%; object-fit: cover; }

/* ==== Category bands (rules §2): imaged anchor + 2-col text list =========== */
.pulse-band { display: grid; gap: 13px; }
.pulse-band-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-top: 15px;
  border-top: 1.5px solid rgba(31, 61, 69, .14);
}
.pulse-band-head h2 { margin: 0; font-size: var(--fs-lg); }
.pulse-seeall {
  margin-left: auto;
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--sky-deep);
  white-space: nowrap;
}
.pulse-seeall:hover .arrow { transform: translateX(4px); }

.pulse-band-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: var(--gap);
  align-items: start;
}
/* alternate the anchor side band-by-band so the page never reads as rows */
.pulse-band--flip .pulse-band-grid { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.pulse-band--flip .pcard--anchor { order: 2; }

.pcard--anchor .pcard-media { aspect-ratio: 16 / 10; }
.pcard--anchor .pcard-title { font-size: var(--fs-lg); line-height: 1.28; }

/* the band's text list: one card, items divided by hairlines, 2 columns */
.pulse-band-list {
  padding: 4px 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 0;
}
.pband-item {
  display: grid;
  gap: 5px;
  padding: 13px 18px;
  color: inherit;
  border-bottom: 1.5px solid rgba(31, 61, 69, .10);
  transition: background var(--t-fast) var(--ease-out);
}
.pband-item:hover { background: var(--mist); }
.pband-item:nth-child(odd) { border-right: 1.5px solid rgba(31, 61, 69, .10); }
.pband-item:nth-last-child(-n+2) { border-bottom: 0; }
.pband-item-title {
  font-weight: 700;
  font-size: var(--fs-md);
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.pband-item-sum {
  color: var(--ink-60);
  font-size: var(--fs-sm);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---- Empty state & footer ------------------------------------------------- */
.pulse-empty { text-align: center; padding: 44px 22px; }
.pulse-foot { padding: 6px 2px 18px; }

/* ---- Responsive (rules §5: everything stacks, no horizontal scrolling) ---- */
@media (max-width: 1100px) {
  .pulse-band-grid,
  .pulse-band--flip .pulse-band-grid { grid-template-columns: 1fr; }
  .pulse-band--flip .pcard--anchor { order: 0; }
}
@media (max-width: 900px) {
  .pulse-lead { grid-template-columns: 1fr; }
  .pulse-lead-under { grid-template-columns: 1fr; }
  .pulse-band-list { grid-template-columns: 1fr; }
  .pband-item:nth-child(odd) { border-right: 0; }
  .pband-item:nth-last-child(-n+2) { border-bottom: 1.5px solid rgba(31, 61, 69, .10); }
  .pband-item:last-child { border-bottom: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .pcard, .pcard-media img, .pside-top-media img, .pulse-chip,
  .pcard-out, .arrow, .pside-row, .pband-item { transition: none; }
}