/*
 * spark.css — light editorial theme (ported from spark-demo-0891b2; BEM: zipline-spark).
 * Full base styles + theme. Load with /embed/spark.js.
 *
 * Accent:  #0891b2  (cyan-600)
 * Surface: #f7f6f3  (warm off-white)
 * Text:    #1c1917  (warm near-black)
 */


/* ─────────────────────────────────────────
   DESIGN TOKENS
   ───────────────────────────────────────── */
:root {
  --zs-pub-accent:       #0891b2;
  --zs-pub-accent-dim:   rgba(8, 145, 178, 0.12);
  --zs-pub-accent-mid:   rgba(8, 145, 178, 0.35);
  --zs-pub-surface:      #f7f6f3;
  --zs-pub-card:         #ffffff;
  --zs-pub-card-hover:   #f0f4f6;
  --zs-pub-border:       #e2dfd8;
  --zs-pub-text:         #1c1917;
  --zs-pub-muted:        #6b7280;
  --zs-pub-muted-light:  #9ca3af;
  --zs-pub-header-bg:    #1c1917;
  --zs-pub-header-text:  #f7f6f3;
  --zs-pub-star:         #0891b2;
}


/* ─────────────────────────────────────────
   BASE — INLINE CAROUSEL
   ───────────────────────────────────────── */
.zipline-spark {
  --zs-radius: 12px;
  --zs-gap: 12px;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  margin: 1.25rem 0;
  padding: 0;
  box-sizing: border-box;
}

.zipline-spark *,
.zipline-spark *::before,
.zipline-spark *::after {
  box-sizing: border-box;
}

.zipline-spark__loading {
  font-size: 0.875rem;
  padding: 0.75rem 0;
  color: var(--zs-pub-muted);
}

/* Force light tokens regardless of --dark / --light class */
.zipline-spark--dark,
.zipline-spark--light {
  --zs-bg:         var(--zs-pub-surface);
  --zs-card:       var(--zs-pub-card);
  --zs-card-hover: var(--zs-pub-card-hover);
  --zs-border:     var(--zs-pub-border);
  --zs-text:       var(--zs-pub-text);
  --zs-muted:      var(--zs-pub-muted);
  --zs-accent:     var(--zs-pub-accent);
}

/* Header row */
.zipline-spark__head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.zipline-spark__head-star {
  color: var(--zs-pub-star);
  font-size: 1rem;
  line-height: 1;
}

.zipline-spark__head-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--zs-pub-text);
  letter-spacing: -0.01em;
}

/* Carousel shell — gradient border using background-clip trick (no z-index issues) */
.zipline-spark__carousel {
  display: flex;
  align-items: stretch;
  gap: 8px;
  border-radius: 12px;
  padding: 14px 10px;
  position: relative;
  border: 1px solid transparent;
  background:
    linear-gradient(#ffffff, #ffffff) padding-box,
    linear-gradient(120deg, #7dd3fc 0%, #a5f3fc 50%, #67e8f9 100%) border-box;
  box-shadow:
    0 4px 20px rgba(8,145,178,0.15),
    0 1px 4px rgba(0,0,0,0.06);
}

/* Nav arrows */
.zipline-spark__nav {
  flex-shrink: 0;
  width: 36px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--zs-pub-muted);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s, background 0.15s;
}

.zipline-spark__nav:hover {
  color: var(--zs-pub-accent);
  background: var(--zs-pub-accent-dim);
}

/* Scrollable track */
.zipline-spark__track-wrap {
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}

.zipline-spark__track {
  display: flex;
  gap: 16px;
  padding: 4px 4px;
}

/* Extra trailing space so last card can snap to left edge */
.zipline-spark__track::after {
  content: '';
  flex: 0 0 1px;
  padding-right: 24px;
}

/* Question cards */
.zipline-spark__card {
  flex: 0 0 auto;
  width: min(260px, 72vw);
  min-height: 84px;
  padding: 16px 18px;
  text-align: left;
  background: var(--zs-pub-card);
  border: 1px solid var(--zs-pub-border);
  border-radius: 8px;
  color: var(--zs-pub-text);
  font-size: 0.875rem;
  line-height: 1.6;
  cursor: pointer;
  scroll-snap-align: start;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}

.zipline-spark__card:hover {
  background: var(--zs-pub-card-hover);
  border-color: var(--zs-pub-accent);
  box-shadow: 0 2px 10px rgba(8,145,178,0.18);
}

.zipline-spark__card-text {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}


/* ─────────────────────────────────────────
   SIDEBAR — fixed right panel
   ───────────────────────────────────────── */
.zipline-spark__sidebar[hidden] {
  display: none !important;
}

body.zipline-spark-sidebar-visible {
  padding-right: var(--zipline-spark-sidebar-width, 420px);
  transition: padding-right 0.2s ease-out;
}

@media (max-width: 768px) {
  body.zipline-spark-sidebar-visible {
    padding-right: 0;
  }
}

.zipline-spark__sidebar {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(var(--zipline-spark-sidebar-width, 420px), 100vw);
  max-width: 100vw;
  height: 100vh;
  height: 100dvh;
  background: var(--zs-pub-surface);
  box-shadow: -4px 0 28px rgba(0,0,0,0.10);
  display: flex;
  flex-direction: column;
  pointer-events: auto;
  z-index: 2147483646;
  overflow: hidden;
  border-left: 1px solid var(--zs-pub-border);
}

/* Top bar — dark for brand anchor */
.zipline-spark__sidebar-top {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: var(--zs-pub-header-bg);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.zipline-spark__sidebar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--zs-pub-header-text);
  letter-spacing: -0.01em;
}

.zipline-spark__sidebar-star {
  color: var(--zs-pub-accent);
  font-size: 1rem;
}

.zipline-spark__sidebar-close {
  width: 38px;
  height: 38px;
  border: none;
  border-radius: 8px;
  background: rgba(255,255,255,0.10);
  color: var(--zs-pub-header-text);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
}

.zipline-spark__sidebar-close:hover {
  background: rgba(255,255,255,0.20);
}

/* Tabs */
.zipline-spark__tabs {
  display: flex;
  gap: 0;
  background: var(--zs-pub-card);
  border-bottom: 1px solid var(--zs-pub-border);
  flex-shrink: 0;
}

.zipline-spark__tab {
  flex: 1;
  padding: 13px 14px;
  border: none;
  background: transparent;
  color: var(--zs-pub-muted);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.15s;
}

.zipline-spark__tab--active {
  color: var(--zs-pub-accent);
  border-bottom-color: var(--zs-pub-accent);
}

.zipline-spark__tab:not(.zipline-spark__tab--active):hover {
  color: var(--zs-pub-text);
}

/* Inline ad block: between answer/actions and Explore more (see spark.js) */
.zipline-spark__turn-ad-wrap {
  flex-shrink: 0;
  margin-top: 16px;
  padding: 12px 0 0;
  border-top: 1px solid var(--zs-pub-border);
}

.zipline-spark__turn-ad-wrap[hidden] {
  display: none !important;
}

/* Sidebar body */
.zipline-spark__sidebar-body {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  background: var(--zs-pub-surface);
  overflow: hidden;
}

.zipline-spark__pane--answer {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  padding: 0;
  overflow: hidden;
}

/* Chat scroll area */
.zipline-spark__chat {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 16px 16px 24px;
  background: var(--zs-pub-surface);
  -webkit-overflow-scrolling: touch;
}

.zipline-spark__turn {
  margin-bottom: 4px;
}

/* Question heading */
.zipline-spark__turn-q {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--zs-pub-text);
  line-height: 1.35;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--zs-pub-accent);
}

.zipline-spark__turn-body {
  position: relative;
}

/* Loading state */
.zipline-spark__loading-block {
  padding: 4px 0 16px;
}

.zipline-spark__loading-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--zs-pub-muted);
  margin-bottom: 14px;
}

.zipline-spark__loading-star {
  color: var(--zs-pub-accent);
  font-size: 1rem;
}

/* Shimmer skeleton — light version */
.zipline-spark__skeleton {
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(90deg, #e5e2db 0%, #d4d0c9 50%, #e5e2db 100%);
  background-size: 200% 100%;
  animation: zipline-spark-shimmer 1.2s ease-in-out infinite;
  margin-bottom: 10px;
  max-width: 100%;
}

.zipline-spark__skeleton--mid   { max-width: 92%; }
.zipline-spark__skeleton--short { max-width: 55%; margin-bottom: 0; }

@keyframes zipline-spark-shimmer {
  0%   { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

.zipline-spark__turn-actions {
  margin-top: 10px;
}

.zipline-spark__turn-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--zs-pub-border), transparent);
  margin: 20px 0 8px;
}

/* Sources / general pane */
.zipline-spark__pane {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 14px 16px 20px;
  background: var(--zs-pub-surface);
  -webkit-overflow-scrolling: touch;
}

/* Answer text */
.zipline-spark__answer {
  font-size: 0.9rem;
  line-height: 1.65;
  color: #374151;
}

.zipline-spark__answer p { margin: 0 0 0.8rem; }

.zipline-spark__answer ul {
  margin: 0.5rem 0;
  padding-left: 1.1rem;
  color: #374151;
}

.zipline-spark__answer h3,
.zipline-spark__answer h4 {
  margin: 1rem 0 0.4rem;
  font-size: 0.9375rem;
  color: var(--zs-pub-text);
}

.zipline-spark__thinking {
  color: var(--zs-pub-muted);
  font-style: italic;
}

.zipline-spark__err {
  color: #dc2626;
  margin: 0;
}

/* Action icon buttons */
.zipline-spark__answer-actions {
  margin-top: 12px;
  display: flex;
  gap: 8px;
}

.zipline-spark__icon-btn {
  width: 40px;
  height: 36px;
  border: 1px solid var(--zs-pub-border);
  border-radius: 8px;
  background: var(--zs-pub-card);
  color: var(--zs-pub-muted);
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.zipline-spark__icon-btn:hover {
  background: var(--zs-pub-accent-dim);
  color: var(--zs-pub-accent);
  border-color: var(--zs-pub-accent-mid);
}

/* AdSense for Search — each turn has a unique #zipline-spark-afs-<n> (see spark.js) */
.zipline-spark__ad-display {
  width: 100%;
}

.zipline-spark__afs-container {
  margin-top: 8px;
  min-height: 120px;
  width: 100%;
  max-width: 100%;
}

.zipline-spark__ad-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--zs-pub-muted-light);
}

/* Explore More */
.zipline-spark__turn-explore,
.zipline-spark__explore {
  margin-top: 18px;
}

.zipline-spark__turn-ad-wrap + .zipline-spark__turn-explore {
  margin-top: 14px;
}

.zipline-spark__explore-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--zs-pub-muted);
  margin-bottom: 10px;
}

/* Chips — clean outlined style */
.zipline-spark__explore-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  text-align: left;
  padding: 11px 14px;
  margin-bottom: 8px;
  border-radius: 8px;
  border: 1.5px solid var(--zs-pub-border);
  background: var(--zs-pub-card);
  color: var(--zs-pub-text);
  font-size: 0.8125rem;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s, transform 0.1s;
}

.zipline-spark__explore-chip:hover {
  border-color: var(--zs-pub-accent);
  background: var(--zs-pub-accent-dim);
  box-shadow: 0 0 0 1px var(--zs-pub-accent-mid);
  transform: translateX(-1px);
}

.zipline-spark__explore-arrow {
  color: var(--zs-pub-accent);
  margin-left: 8px;
  flex-shrink: 0;
}

/* Sources */
.zipline-spark__sources-intro {
  color: var(--zs-pub-muted);
  font-size: 0.875rem;
  margin: 0 0 12px;
}

.zipline-spark__sources-link {
  color: var(--zs-pub-accent);
  word-break: break-all;
  font-size: 0.875rem;
}



/* ─────────────────────────────────────────
   MOBILE CAROUSEL FIXES
   ───────────────────────────────────────── */
@media (max-width: 600px) {
  /* Stop arrows from stretching full carousel height */
  .zipline-spark__nav {
    align-self: center;
    height: 44px;
  }

  /* Card width: viewport minus publisher page margins (~40px) minus
     both nav buttons (32px x2) minus carousel padding and gaps (~40px) */
  .zipline-spark__card {
    width: min(240px, calc(100vw - 160px));
    min-width: 0;
  }

  .zipline-spark__carousel {
    padding: 10px 8px;
    align-items: center;
  }
}

/* ─────────────────────────────────────────
   MOBILE (SIDEBAR)
   ───────────────────────────────────────── */
@media (max-width: 520px) {
  .zipline-spark__sidebar {
    width: 100vw !important;
    border-left: none;
    border-top: 3px solid var(--zs-pub-accent);
  }
}