/* =============================================================================
   Sources — /sources: public constituents of the attention indices.
   Same page family as /articles, /newsletter, /newsroom.
   ============================================================================= */

.src {
  --src-line: rgba(255, 255, 255, 0.06);
  --src-ink: rgba(255, 255, 255, 0.92);
  --src-ink-2: rgba(255, 255, 255, 0.55);
  --src-ink-3: rgba(255, 255, 255, 0.35);
  --src-accent: #00a8ff;
  max-width: 860px; margin: 0 auto; padding: 24px 32px 64px;
}

/* ---- header (site family: centered + radial glow) ---------------------------- */
.src-header { position: relative; text-align: center; margin: 0.6rem 0 2.4rem; }
.src-header::before {
  content: ''; position: absolute; top: -160px; left: 50%; transform: translateX(-50%);
  width: min(900px, 100vw); height: 420px;
  background: radial-gradient(ellipse at center, rgba(0, 168, 255, 0.07) 0%, transparent 65%);
  pointer-events: none;
}
.src-title {
  position: relative; margin: 0 0 0.7rem;
  font-size: clamp(2rem, 4vw, 2.7rem); font-weight: 650;
  letter-spacing: -0.03em; line-height: 1.12; color: var(--src-ink);
}
.src-subtitle {
  position: relative; margin: 0 auto; max-width: 580px;
  font-size: 0.95rem; line-height: 1.6; color: var(--src-ink-2);
}

/* ---- collapsible index card ------------------------------------------------------ */
.src-card {
  border: 1px solid var(--src-line); border-radius: 14px;
  background: rgba(255, 255, 255, 0.02); overflow: hidden;
}
.src-card-head {
  display: flex; align-items: center; gap: 18px; padding: 20px 22px;
  cursor: pointer; list-style: none; transition: background 0.12s ease;
}
.src-card-head::-webkit-details-marker { display: none; }
.src-card-head::marker { content: ''; }
/* Pico styles details/summary as an accordion with its own ::after chevron
   and spacing — suppress all of it (we draw our own chevron). */
.src-card-head::after { display: none !important; }
details.src-card { margin: 0; padding: 0; border-bottom: 1px solid var(--src-line); }
details.src-card > summary { margin: 0; color: inherit; }
details.src-card[open] > summary { margin: 0; color: inherit; }
.src-card-head:hover { background: rgba(255, 255, 255, 0.02); }
.src-card-main { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.src-card-title { font-size: 1.12rem; font-weight: 700; letter-spacing: -0.01em; color: var(--src-ink); }
.src-criteria { margin: 0; font-size: 0.8rem; line-height: 1.55; color: var(--src-ink-3); max-width: 620px; }
.src-card-meta { font-size: 0.74rem; font-weight: 600; color: var(--src-ink-2); font-variant-numeric: tabular-nums; }
.src-card-chev { flex: none; margin-left: auto; color: var(--src-ink-3); transition: transform 0.2s ease; }
.src-card[open] .src-card-chev { transform: rotate(180deg); }
.src-card[open] .src-card-head { border-bottom: 1px solid var(--src-line); }

/* ---- source table (inside the card) ----------------------------------------------- */
.src-table { overflow: hidden; }
.src-row {
  display: grid; grid-template-columns: 1fr 90px 130px 170px;
  gap: 14px; align-items: center; padding: 14px 18px;
  border-top: 1px solid var(--src-line); text-decoration: none;
  transition: background 0.12s ease;
}
.src-row:first-child { border-top: none; }
a.src-row:hover { background: rgba(255, 255, 255, 0.03); }
.src-row-head {
  font-size: 0.62rem; font-weight: 800; font-style: italic; letter-spacing: 0.08em;
  text-transform: uppercase; color: rgba(255, 255, 255, 0.45);
  background: rgba(255, 255, 255, 0.02); padding-top: 11px; padding-bottom: 11px;
}
.src-name-cell { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.src-name { font-size: 0.95rem; font-weight: 700; color: var(--src-ink); }
a.src-row:hover .src-name { color: var(--src-accent); }
.src-handle { font-size: 0.72rem; color: var(--src-ink-3); }
.src-col-platform { color: var(--src-ink-2); display: flex; align-items: center; }
.src-platform-label { font-size: 0.72rem; font-weight: 600; }
.src-col-num { font-size: 0.9rem; font-weight: 700; color: var(--src-ink); font-variant-numeric: tabular-nums; text-align: right; }
.src-row-head .src-col-num { font-size: 0.62rem; font-weight: 800; color: rgba(255, 255, 255, 0.45); }
.src-col-span { font-size: 0.78rem; color: var(--src-ink-2); text-align: right; font-variant-numeric: tabular-nums; }
.src-row-head .src-col-span { font-size: 0.62rem; }

.src-note { margin: 0; padding: 14px 22px 18px; font-size: 0.76rem; line-height: 1.6; color: var(--src-ink-3); border-top: 1px solid var(--src-line); }
.src-empty { color: var(--src-ink-3); }

/* ---- CTAs ------------------------------------------------------------------------ */
.src-ctas { display: flex; gap: 22px; flex-wrap: wrap; margin-top: 2.2rem; padding-top: 1.4rem; border-top: 1px solid var(--src-line); }
.src-cta { font-size: 0.84rem; font-weight: 600; color: var(--src-ink-2); text-decoration: none; }
.src-cta:hover { color: var(--src-accent); }

@media (max-width: 720px) {
  .src { padding: 18px 18px 48px; }
  .src-row { grid-template-columns: 1fr 70px; }
  .src-col-num, .src-col-span { display: none; }
}