/* Series page styles - matches liquid glass aesthetic */

body {
  font-family: Inter, system-ui, sans-serif;
  background: radial-gradient(ellipse at top, #1e3a5f 0%, #1e293b 50%, #020617 100%);
  color: var(--text);
  margin: 0;
  padding: 24px;
  min-height: 100vh;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 20% 50%, rgba(125, 211, 252, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(56, 189, 248, 0.08) 0%, transparent 55%);
  pointer-events: none;
  z-index: 0;
}

body > * {
  position: relative;
  z-index: 1;
}

.series-shell {
  max-width: 860px;
  margin: 0 auto;
}

/* ── Nav ── */
.series-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  padding: 12px 16px;
}

.series-back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  background: rgba(15, 23, 42, 0.7);
  color: var(--text);
  text-decoration: none;
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

.series-back-link:hover {
  border-color: var(--accent);
  background: rgba(15, 23, 42, 0.9);
  transform: translateY(-1px);
}

/* ── Page header ── */
.series-page-header.glass {
  padding: 24px 28px;
  margin-bottom: 24px;
}

.series-page-title {
  font-size: 2rem;
  margin: 0;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Series cards ── */
.series-card.glass {
  margin-bottom: 18px;
  padding: 0;
  overflow: hidden;
}

.series-card-header {
  /* reset glass.css button defaults */
  all: unset;
  box-sizing: border-box;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 22px;
  cursor: pointer;
  border-radius: 16px;
  transition: background 0.15s ease;
}

.series-card-header:hover {
  background: rgba(125, 211, 252, 0.05);
}

.series-card-header:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: -2px;
}

.series-card.open .series-card-header {
  border-radius: 16px 16px 0 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.series-card-title-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  min-width: 0;
}

.series-card-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.series-post-count {
  font-size: 0.78rem;
  color: var(--text-muted);
  background: rgba(148, 163, 184, 0.12);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 999px;
  padding: 2px 10px;
  white-space: nowrap;
  flex-shrink: 0;
}

.series-chevron {
  color: var(--text-muted);
  font-size: 0.85rem;
  flex-shrink: 0;
  transition: transform 0.25s ease;
}

.series-card.open .series-chevron {
  transform: rotate(180deg);
}

/* ── Expandable posts list ── */
.series-posts-list {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0, 1, 0.5, 1);
}

.series-card.open .series-posts-list {
  max-height: 5000px;
  transition: max-height 0.5s ease-in-out;
}

/* ── Individual post rows ── */
.series-post-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  color: var(--text);
  text-decoration: none;
  transition: background 0.15s ease;
}

.series-post-item:hover {
  background: rgba(125, 211, 252, 0.06);
}

.series-post-num {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 20px;
  text-align: right;
  flex-shrink: 0;
}

.series-post-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.series-post-title {
  font-size: 0.93rem;
  font-weight: 500;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 0.15s ease;
}

.series-post-item:hover .series-post-title {
  color: var(--accent);
}

.series-post-meta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.series-post-date {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.series-post-type-badge {
  font-size: 0.7rem;
  color: var(--accent);
  border: 1px solid rgba(125, 211, 252, 0.3);
  border-radius: 4px;
  padding: 1px 6px;
  white-space: nowrap;
}

.series-post-arrow {
  color: var(--text-muted);
  flex-shrink: 0;
  transition: transform 0.15s ease, color 0.15s ease;
}

.series-post-item:hover .series-post-arrow {
  transform: translateX(4px);
  color: var(--accent);
}

/* ── States ── */
.series-loading,
.series-empty,
.series-error {
  color: var(--text-muted);
  text-align: center;
  padding: 48px 0;
}

/* ── Mobile ── */
@media (max-width: 768px) {
  body {
    padding: 16px;
  }

  .series-page-header.glass {
    padding: 20px;
  }

  .series-card-header {
    padding: 16px 18px;
  }

  .series-post-item {
    padding: 12px 18px;
  }

  .series-post-title {
    white-space: normal;
  }
}

@media (max-width: 480px) {
  body {
    padding: 12px;
  }

  .series-page-header.glass {
    padding: 16px;
  }

  .series-page-title {
    font-size: 1.6rem;
  }

  .series-card-header {
    padding: 14px 16px;
    gap: 10px;
  }

  .series-card-name {
    font-size: 1.05rem;
  }

  .series-post-item {
    padding: 10px 16px;
    gap: 10px;
  }
}