/* ═══ FONTS ═══ */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garant:ital,wght@0,300;0,400;0,600;0,700;1,300;1,400&family=IBM+Plex+Mono:wght@300;400;500&family=Lora:ital,wght@0,400;0,600;1,400&display=swap');

.kustos-panel,
.kustos-fab {
  --k-ink:        var(--ink,       #1a1a18);
  --k-ink-soft:   var(--ink-soft,  #4a4840);
  --k-ink-faint:  var(--ink-faint, #8a8478);
  --k-paper:      var(--paper,     #faf9f6);
  --k-paper-warm: var(--paper-warm,#f3f1eb);
  --k-paper-mid:  var(--paper-mid, #ebe8e0);
  --k-sea:        var(--sea,       #6fa8b8);
  --k-sea-light:  var(--sea-light, #9ecad6);
  --k-sea-pale:   var(--sea-pale,  #deeef2);
  --k-sea-wash:   var(--sea-wash,  #f0f8fa);
  --k-border:     var(--border,    rgba(26,26,24,0.10));
  --k-f-display:  var(--f-display, 'Cormorant Garant', Georgia, serif);
  --k-f-mono:     var(--f-mono,    'IBM Plex Mono', monospace);
  --k-f-body:     var(--f-body,    'Lora', Georgia, serif);
  --k-radius:     14px;
}

/* ═══ FAB — kompaktan okrugli gumb, samo ikona ═══ */
.kustos-fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9998;
  width: 48px;
  height: 48px;
  padding: 0;
  background: var(--k-ink);
  color: var(--k-paper);
  border: none;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background .2s, transform .2s, box-shadow .2s;
  box-shadow: 0 4px 16px rgba(26,26,24,0.18);
}
.kustos-fab:hover {
  background: var(--k-sea);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(111,168,184,0.32);
}
.kustos-fab:focus-visible {
  outline: 2px solid var(--k-sea);
  outline-offset: 3px;
}
.kustos-fab-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  opacity: .95;
}

/* ═══ OVERLAY ═══ */
.kustos-overlay {
  position: fixed;
  inset: 0;
  background: rgba(26,26,24,0);
  z-index: 9999;
  pointer-events: none;
  transition: background .3s ease;
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
}
.kustos-overlay.open {
  background: rgba(26,26,24,0.4);
  pointer-events: auto;
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}

/* ═══ PANEL ═══ */
.kustos-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  max-width: 460px;
  height: 100%;
  height: 100dvh;
  background: var(--k-paper);
  z-index: 10000;
  box-shadow: -12px 0 48px rgba(26,26,24,0.14);
  display: flex;
  flex-direction: column;
  transform: translateX(102%);
  transition: transform .38s cubic-bezier(0.32, 0.72, 0, 1);
  overflow: hidden;
}
.kustos-panel.open {
  transform: translateX(0);
}

/* ═══ HEADER ═══ */
.kustos-header {
  padding: 18px 20px;
  border-bottom: 1px solid var(--k-border);
  flex-shrink: 0;
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(111,168,184,0.14) 0%, transparent 60%),
    var(--k-paper);
}
.kustos-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.kustos-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}
.kustos-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--k-ink);
  color: var(--k-paper);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 6px 16px rgba(26,26,24,0.16);
}
.kustos-icon-wrap svg {
  width: 20px;
  height: 20px;
}
.kustos-title {
  margin: 0;
  font-family: var(--k-f-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--k-ink);
  letter-spacing: -0.01em;
  line-height: 1.05;
}
.kustos-subtitle {
  margin: 5px 0 0;
  font-family: var(--k-f-mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--k-sea);
}
.kustos-header-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}
.kustos-btn-icon,
.kustos-close {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: transparent;
  border: 1px solid var(--k-border);
  color: var(--k-ink-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
}
.kustos-btn-icon:hover,
.kustos-close:hover {
  background: var(--k-ink);
  color: var(--k-paper);
  border-color: var(--k-ink);
}
.kustos-btn-icon svg,
.kustos-close svg {
  width: 15px;
  height: 15px;
}

/* ═══ BODY ═══ */
.kustos-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

/* ═══ MESSAGES ═══ */
.kustos-messages {
  flex: 1;
  overflow-y: auto;
  padding: 22px 20px 12px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
}
.kustos-messages::-webkit-scrollbar { width: 4px; }
.kustos-messages::-webkit-scrollbar-thumb { background: var(--k-paper-mid); border-radius: 4px; }

/* Welcome */
.kustos-welcome {
  padding: 18px 20px;
  background: var(--k-sea-wash);
  border: 1px solid rgba(111,168,184,0.2);
  border-radius: var(--k-radius);
  font-family: var(--k-f-body);
  font-size: 14.5px;
  color: var(--k-ink-soft);
  line-height: 1.65;
  animation: kustosSlideIn .35s ease both;
}
.kustos-welcome strong {
  font-family: var(--k-f-display);
  font-size: 20px;
  font-weight: 600;
  color: var(--k-ink);
  display: block;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

/* Chip prijedlozi */
.kustos-chips-wrap {
  animation: kustosSlideIn .35s .08s ease both;
}
.kustos-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.kustos-chip {
  font-family: var(--k-f-body);
  font-size: 13px;
  color: var(--k-ink-soft);
  background: #fff;
  border: 1px solid var(--k-border);
  border-radius: 999px;
  padding: 8px 14px;
  cursor: pointer;
  transition: background .18s, border-color .18s, color .18s, transform .18s;
  line-height: 1.2;
  text-align: left;
}
.kustos-chip:hover {
  background: var(--k-sea-wash);
  border-color: var(--k-sea-light);
  color: var(--k-ink);
  transform: translateY(-1px);
}

/* Oznaka pošiljatelja */
.kustos-sender-label {
  font-family: var(--k-f-mono);
  font-size: 8.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--k-ink-faint);
  padding-left: 2px;
  margin-bottom: -4px;
}
.kustos-sender-label.user {
  text-align: right;
  padding-right: 4px;
  padding-left: 0;
}

/* Jedan krug razgovora */
.kustos-turn {
  display: flex;
  flex-direction: column;
  gap: 10px;
  animation: kustosSlideIn .3s ease both;
}
@keyframes kustosSlideIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Mjehurići */
.kustos-msg {
  max-width: 88%;
  padding: 12px 16px;
  font-family: var(--k-f-body);
  font-size: 14px;
  line-height: 1.65;
  border-radius: var(--k-radius);
}
.kustos-msg p { margin: 0; }
.kustos-msg-bot {
  background: #fff;
  border: 1px solid var(--k-border);
  border-top-left-radius: 4px;
  color: var(--k-ink-soft);
  align-self: flex-start;
  box-shadow: 0 2px 10px rgba(26,26,24,0.04);
}
.kustos-msg-user {
  background: var(--k-ink);
  color: var(--k-paper);
  border-top-right-radius: 4px;
  align-self: flex-end;
}

/* Naslov iznad kartica */
.kustos-products-label {
  font-family: var(--k-f-mono);
  font-size: 8.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--k-ink-faint);
  padding-left: 2px;
  margin-top: 4px;
  margin-bottom: -2px;
}

/* ═══ KARTICE KNJIGA ═══ */
.kustos-turn-products {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}
.kustos-product-card {
  background: #fff;
  border: 1px solid var(--k-border);
  border-radius: 10px;
  overflow: hidden;
  transition: border-color .2s, box-shadow .2s, transform .2s;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.kustos-product-card:hover {
  border-color: var(--k-sea-light);
  box-shadow: 0 8px 20px rgba(111,168,184,0.18);
  transform: translateY(-2px);
}
.kustos-product-card:focus-visible {
  outline: 2px solid var(--k-sea);
  outline-offset: 2px;
}
.kustos-product-card-img {
  width: 100%;
  aspect-ratio: 2 / 3;
  background: var(--k-sea-wash);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  flex-shrink: 0;
}
.kustos-product-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .4s ease;
}
.kustos-product-card:hover .kustos-product-card-img img {
  transform: scale(1.04);
}
.kustos-product-card-img svg {
  width: 28px;
  height: 28px;
  color: var(--k-sea-light);
}
.kustos-product-card-ribbon {
  position: absolute;
  top: 6px;
  left: 6px;
  background: var(--k-ink);
  color: var(--k-paper);
  font-family: var(--k-f-mono);
  font-size: 7.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 7px;
  border-radius: 999px;
  line-height: 1;
}
.kustos-product-card-info {
  padding: 9px 9px 11px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.kp-title {
  font-family: var(--k-f-display);
  font-size: 14px;
  font-weight: 600;
  color: var(--k-ink);
  line-height: 1.2;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
  min-height: 2.4em;
  letter-spacing: -0.01em;
}
.kp-author {
  font-family: var(--k-f-mono);
  font-size: 9px;
  letter-spacing: 0.04em;
  color: var(--k-ink-faint);
  margin: 4px 0 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.kp-price {
  font-family: var(--k-f-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--k-sea);
  margin: auto 0 0;
  padding-top: 6px;
}

/* ═══ LOADER ═══ */
.kustos-loading-bubble {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  align-self: flex-start;
  padding: 11px 16px 11px 14px;
  background: #fff;
  border: 1px solid var(--k-border);
  border-radius: var(--k-radius);
  border-top-left-radius: 4px;
  box-shadow: 0 2px 10px rgba(26,26,24,0.04);
}
.kustos-loading-text {
  font-family: var(--k-f-body);
  font-style: italic;
  font-size: 14px;
  color: var(--k-ink-soft);
  transition: opacity .2s ease, transform .2s ease;
}
.kustos-loading-text.is-swapping {
  opacity: 0;
  transform: translateY(3px);
}

/* Knjiga koja lista stranice */
.kustos-loading-book {
  position: relative;
  width: 26px;
  height: 18px;
  flex-shrink: 0;
  perspective: 80px;
}
.kustos-loading-book::before,
.kustos-loading-book::after {
  content: '';
  position: absolute;
  top: 0;
  width: 50%;
  height: 100%;
  background: var(--k-sea-wash);
  border: 1.5px solid var(--k-sea);
}
.kustos-loading-book::before {
  left: 0;
  border-right-width: .75px;
  border-radius: 3px 0 0 3px;
}
.kustos-loading-book::after {
  right: 0;
  border-left-width: .75px;
  border-radius: 0 3px 3px 0;
}
.kustos-loading-book span {
  position: absolute;
  top: 1.5px;
  left: 50%;
  width: calc(50% - 1.5px);
  height: calc(100% - 3px);
  background: #fff;
  border-left: 1px solid var(--k-sea-light);
  transform-origin: left center;
  z-index: 1;
  animation: kustosPageFlip 1.8s cubic-bezier(.45, 0, .35, 1) infinite;
}
.kustos-loading-book span:nth-child(2) { animation-delay: .3s; }
.kustos-loading-book span:nth-child(3) { animation-delay: .6s; }
@keyframes kustosPageFlip {
  0%, 10%   { transform: rotateY(0deg); }
  55%, 100% { transform: rotateY(-180deg); }
}

/* Kostur kartica dok stižu preporuke */
.kustos-skeletons {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}
.kustos-skeleton {
  background: #fff;
  border: 1px solid var(--k-border);
  border-radius: 10px;
  overflow: hidden;
  padding-bottom: 11px;
}
.kustos-skeleton-cover,
.kustos-skeleton-line {
  background: linear-gradient(90deg, var(--k-paper-warm) 0%, var(--k-paper-mid) 50%, var(--k-paper-warm) 100%);
  background-size: 200% 100%;
  animation: kustosShimmer 1.4s ease-in-out infinite;
}
.kustos-skeleton-cover {
  aspect-ratio: 2 / 3;
}
.kustos-skeleton-line {
  height: 9px;
  margin: 10px 9px 0;
  border-radius: 4px;
}
.kustos-skeleton-line--short {
  width: 55%;
  margin-top: 7px;
}
.kustos-skeleton:nth-child(2) .kustos-skeleton-cover,
.kustos-skeleton:nth-child(2) .kustos-skeleton-line { animation-delay: .15s; }
.kustos-skeleton:nth-child(3) .kustos-skeleton-cover,
.kustos-skeleton:nth-child(3) .kustos-skeleton-line { animation-delay: .3s; }
@keyframes kustosShimmer {
  0%   { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

/* ═══ UNOS ═══ */
.kustos-input-wrap {
  padding: 12px 16px 16px;
  padding-bottom: max(16px, env(safe-area-inset-bottom));
  border-top: 1px solid var(--k-border);
  background: var(--k-paper);
  flex-shrink: 0;
}
.kustos-input-field {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 6px 6px 6px 16px;
  background: #fff;
  border: 1px solid var(--k-paper-mid);
  border-radius: 16px;
  transition: border-color .2s, box-shadow .2s;
}
.kustos-input-field:focus-within {
  border-color: var(--k-sea);
  box-shadow: 0 0 0 3px rgba(111,168,184,0.16);
}
.kustos-input-field textarea {
  flex: 1;
  min-height: 40px;
  max-height: 120px;
  padding: 9px 0;
  border: none;
  background: transparent;
  font-family: var(--k-f-body);
  font-size: 14.5px;
  color: var(--k-ink);
  resize: none;
  outline: none;
  line-height: 1.5;
}
.kustos-input-field textarea::placeholder {
  color: var(--k-ink-faint);
  font-style: italic;
}
.kustos-send {
  width: 40px;
  height: 40px;
  background: var(--k-ink);
  border: none;
  border-radius: 12px;
  color: var(--k-paper);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: background .2s, transform .15s;
}
.kustos-send:hover { background: var(--k-sea); }
.kustos-send:active { transform: scale(.94); }
.kustos-send:disabled { opacity: .4; cursor: not-allowed; transform: none; }
.kustos-send svg { width: 16px; height: 16px; }
.kustos-input-hint {
  margin: 8px 0 0;
  font-family: var(--k-f-mono);
  font-size: 8.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--k-ink-faint);
  text-align: center;
}

/* ═══ RESPONSIVE ═══ */
@media (max-width: 480px) {
  .kustos-panel {
    max-width: 100vw;
  }
  .kustos-fab {
    bottom: 18px;
    right: 14px;
    width: 54px;
    height: 54px;
  }
  .kustos-fab-icon {
    width: 20px;
    height: 20px;
  }
  .kustos-messages { padding: 18px 14px 10px; }
  .kustos-input-wrap { padding-left: 12px; padding-right: 12px; }
  .kustos-input-field textarea { font-size: 16px; }
  .kustos-input-hint { display: none; }
}
@media (max-width: 360px) {
  .kustos-turn-products,
  .kustos-skeletons { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .kustos-skeleton:nth-child(3) { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .kustos-panel,
  .kustos-turn,
  .kustos-welcome,
  .kustos-chips-wrap,
  .kustos-loading-book span,
  .kustos-skeleton-cover,
  .kustos-skeleton-line {
    animation: none;
    transition: none;
  }
}