/* =========================================================
   ARTICLES — ACCORDION LIST + READER
========================================================= */
.page-section[data-page="articles"] {
  width: min(980px, 100%);
  margin-inline: auto;
}

.article-list-shell {
  width: 100%;
  margin-top: 28px;
}

.article-list {
  display: grid;
  gap: 12px;
}

.article-card {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: color-mix(in srgb, var(--glass) 88%, transparent);
  box-shadow: 0 12px 36px rgba(0,0,0,.10);
  transition: border-color .28s var(--ease), background .28s var(--ease), transform .28s var(--ease);
}

.article-card:hover {
  border-color: color-mix(in srgb, var(--tertiary) 36%, var(--border));
}

.article-card.is-open {
  border-color: color-mix(in srgb, var(--tertiary) 45%, var(--border));
  background: color-mix(in srgb, var(--glass) 96%, transparent);
}

.article-summary {
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0,1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 18px 20px;
  border: 0;
  background: transparent;
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.article-summary h3 {
  margin: 0;
  font-family: "Space Grotesk", "DM Sans", sans-serif;
  font-size: clamp(16px, 1.9vw, 20px);
  line-height: 1.28;
  letter-spacing: -.025em;
  font-weight: 700;
}

.article-time {
  color: var(--muted);
  font-size: 10.5px;
  line-height: 1.3;
  white-space: nowrap;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.article-expand {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transition: grid-template-rows .38s var(--ease), opacity .24s ease;
}

.article-card.is-open .article-expand {
  grid-template-rows: 1fr;
  opacity: 1;
}

.article-expand-clip { overflow: hidden; }

.article-detail {
  padding: 0 20px 20px;
  border-top: 1px solid transparent;
}

.article-card.is-open .article-detail {
  padding-top: 20px;
  border-top-color: var(--border);
}

/* Expanded article: keep the visual secondary to the content. */
.article-card.has-pdf .article-detail {
  display: grid;
  grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
  grid-template-areas:
    "preview excerpt"
    "preview actions";
  column-gap: clamp(20px, 3vw, 32px);
  row-gap: 14px;
  align-items: start;
}

.article-card.has-pdf .article-pdf-slot {
  grid-area: preview;
  min-width: 0;
}

.article-card.has-pdf .article-excerpt {
  grid-area: excerpt;
  align-self: start;
}

.article-card.has-pdf .article-detail-actions {
  grid-area: actions;
  align-self: start;
  margin-top: 0;
}

.article-pdf-thumb {
  position: relative;
  width: 100%;
  max-width: 300px;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 15px;
  background: rgba(255,255,255,.035);
  margin: 0;
  box-shadow: 0 10px 30px rgba(0,0,0,.10);
}

.article-pdf-thumb object,
.article-pdf-thumb iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #ececec;
  pointer-events: none;
}


.article-pdf-image {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  background: #fff;
  opacity: 0;
  transition: opacity .22s ease;
}

.article-pdf-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  background: #fff;
  opacity: 0;
  transition: opacity .22s ease;
}

.article-pdf-thumb.using-image .article-pdf-image { opacity: 1; }
.article-pdf-thumb.using-canvas .article-pdf-image { display: none; }
.article-pdf-thumb.using-canvas .article-pdf-canvas { opacity: 1; }
.article-pdf-thumb.is-ready .article-pdf-loading { opacity: 0; pointer-events: none; }

.article-pdf-loading {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 9px;
  color: var(--muted);
  text-align: center;
  padding: 22px;
}

.article-pdf-loading { transition: opacity .2s ease; }
.article-pdf-loading small { display: none; }
.article-pdf-spinner {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid color-mix(in srgb, var(--text) 14%, transparent);
  border-top-color: var(--tertiary);
  animation: articlePdfSpin .75s linear infinite;
}
@keyframes articlePdfSpin { to { transform: rotate(360deg); } }



.article-pdf-label {
  position: absolute;
  left: 10px;
  top: 10px;
  z-index: 4;
  padding: 6px 9px;
  border: 1px solid rgba(255,255,255,.17);
  border-radius: 999px;
  background: rgba(10,11,15,.72);
  color: #fff;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: .1em;
}

.article-pdf-open-overlay {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: block;
  cursor: zoom-in;
}

.article-pdf-label {
  pointer-events: none;
}

.article-excerpt {
  max-width: 760px;
  margin: 0;
  color: color-mix(in srgb, var(--text) 76%, var(--muted));
  font-size: 13.5px;
  line-height: 1.72;
}

.article-detail-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.article-read-more,
.article-open-pdf {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}

.article-read-more {
  border: 0;
  background: var(--primary);
  color: var(--ink);
}

.article-open-pdf {
  border: 1px solid var(--border);
  background: var(--glass);
  color: var(--text);
}

.article-empty,
.article-loading {
  padding: 42px 20px;
  border: 1px dashed var(--border);
  border-radius: 18px;
  color: var(--muted);
  text-align: center;
  font-size: 13px;
}

/* Reader popup */
.article-reader {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(3,5,9,.78);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.article-reader.is-open { display: flex; }

.article-reader-panel {
  position: relative;
  width: min(900px, 94vw);
  max-height: min(88vh, 900px);
  overflow: auto;
  overscroll-behavior: contain;
  border: 1px solid rgba(255,255,255,.13);
  border-radius: 26px;
  background: color-mix(in srgb, var(--bg) 92%, #171a23 8%);
  box-shadow: 0 30px 100px rgba(0,0,0,.5);
  padding: clamp(24px, 4vw, 48px);
}

.article-reader-close {
  position: sticky;
  z-index: 3;
  float: right;
  top: 0;
  width: 40px;
  height: 40px;
  margin: -4px -4px 4px 16px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  color: var(--text);
  font-size: 22px;
  cursor: pointer;
  backdrop-filter: blur(10px);
}

.article-reader-meta {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 10.5px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.article-reader-title {
  max-width: 760px;
  margin: 0 0 28px;
  font-family: "Space Grotesk", "DM Sans", sans-serif;
  font-size: clamp(28px, 5vw, 48px);
  line-height: 1.03;
  letter-spacing: -.045em;
}

.article-reader-body {
  max-width: 760px;
  color: color-mix(in srgb, var(--text) 88%, var(--muted));
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.82;
}

.article-reader-body p { margin: 0 0 1.35em; }
.article-reader-body p:last-child { margin-bottom: 0; }

.article-reader-pdf {
  display: inline-flex;
  margin-top: 26px;
  padding: 11px 15px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--glass);
  color: var(--text);
  font-size: 12px;
  font-weight: 800;
  text-decoration: none;
}

@media (max-width: 760px) {
  .page-section[data-page="articles"] { width: 100%; }
  .article-list-shell { margin-top: 20px; }
  .article-list { gap: 10px; }

  .article-summary {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 16px;
  }

  .article-time { white-space: normal; font-size: 9.5px; }
  .article-summary h3 { font-size: 16px; }

  .article-detail { padding: 0 16px 18px; }
  .article-card.is-open .article-detail { padding-top: 16px; }

  .article-card.has-pdf .article-detail {
    display: grid;
    grid-template-columns: 1fr;
    grid-template-areas:
      "preview"
      "excerpt"
      "actions";
    gap: 14px;
  }

  .article-card.has-pdf .article-pdf-slot {
    display: flex;
    justify-content: center;
  }

  .article-pdf-thumb {
    width: min(100%, 300px);
    max-width: 300px;
    border-radius: 13px;
    box-shadow: 0 8px 24px rgba(0,0,0,.10);
  }

  .article-pdf-label {
    left: 8px;
    top: 8px;
    padding: 5px 8px;
    font-size: 8px;
  }

  .article-excerpt {
    max-width: 62ch;
    font-size: 12.8px;
    line-height: 1.65;
  }

  .article-detail-actions {
    margin-top: 0;
    gap: 8px;
  }

  .article-read-more,
  .article-open-pdf {
    min-height: 38px;
    padding-inline: 13px;
    font-size: 11px;
  }

  .article-reader { padding: 10px; align-items: flex-end; }
  .article-reader-panel {
    width: 100%;
    max-height: 92vh;
    border-radius: 24px 24px 16px 16px;
    padding: 22px 18px 28px;
  }
  .article-reader-title { font-size: 30px; margin-bottom: 22px; }
  .article-reader-body { font-size: 15px; line-height: 1.75; }
}

@media (max-width: 420px) {
  .article-card { border-radius: 17px; }
  .article-summary { padding: 14px; }
  .article-detail { padding-inline: 14px; padding-bottom: 16px; }
  .article-card.is-open .article-detail { padding-top: 14px; }
  .article-pdf-thumb { width: min(100%, 260px); max-width: 260px; }
  .article-detail-actions { align-items: stretch; }
  .article-read-more,
  .article-open-pdf { flex: 1 1 auto; }
}