/* =========================================================
   POJOK BACA — PANDUAN PEMAKAIAN
   Pola langkah + sorot elemen, mengikuti panduan di
   solar-system.html, tapi warnanya ikut tema situs ini.
   ========================================================= */

/*
  Peta z-index yang harus dipatuhi:
  pb-intro 99999 > panduan 10050 > pdf-reader-modal 10000 > book-comment-panel 9999.
  Panduan harus di atas pembaca karena ikut memandu di dalamnya.
*/
/*
  WAJIB ADA. Aturan `display` bertumpu pada selector kelas, dan itu MENANG
  atas aturan bawaan browser `[hidden] { display: none }` (specificity 0,1,0
  vs 0,0,1). Tanpa baris ini, overlay panduan tetap terbentang selebar layar
  walau atribut `hidden` sudah dipasang — dan .pb-guide__blocker menelan
  setiap klik di halaman: pill, buku, sampai tombol "?" sendiri.
*/
.pb-guide[hidden],
.pb-guide__arrow[hidden],
.pb-guide__list[hidden],
.pb-guide__demo-btn[hidden] {
  display: none;
}

.pb-guide {
  position: fixed;
  inset: 0;
  z-index: 10050;
  /* Ruang yang habis dipakai padding overlay (20px) + margin kartu (24px),
     ditambah 4px jarak aman. Dipotong dari --pb-guide-ruang saat membatasi
     tinggi kartu. Dikecilkan lagi di breakpoint 480px di bawah. */
  --pb-guide-sisa: 48px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 20px;
  pointer-events: none;
}

.pb-guide.is-card-top {
  align-items: flex-start;
}

/* Penghalang bening: mencegah klik nyasar ke halaman selama panduan jalan,
   tanpa ikut menggelapkan (penggelapan dikerjakan lubang sorot di bawah). */
.pb-guide__blocker {
  position: absolute;
  inset: 0;
  pointer-events: auto;
}

/*
  Lubang sorot. Penggelapan layar dibuat dari box-shadow raksasa di sekeliling
  lubang, BUKAN dari elemen sasaran yang diangkat z-index-nya. Alasannya:
  sasaran panduan bersarang di dalam .shelf-books yang punya stacking context
  sendiri, jadi menaikkan z-index-nya tidak akan pernah menembus lapisan
  panduan. Dengan lubang, elemen aslinya terlihat apa adanya di tempatnya.
*/
.pb-guide__hole {
  position: fixed;
  left: 0;
  top: 0;
  width: 0;
  height: 0;
  border-radius: 10px;
  box-shadow: 0 0 0 9999px rgba(3, 5, 8, 0.8);
  pointer-events: none;
  transition: left 0.35s cubic-bezier(0.22, 1, 0.36, 1),
    top 0.35s cubic-bezier(0.22, 1, 0.36, 1),
    width 0.35s cubic-bezier(0.22, 1, 0.36, 1),
    height 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.pb-guide__hole::after {
  content: "";
  position: absolute;
  inset: -3px;
  border: 2px solid var(--primary-color, #00aaff);
  border-radius: var(--radius-md);
  opacity: 0;
  transition: opacity 0.3s ease;
  animation: pbGuidePulse 2s ease-in-out infinite;
}

.pb-guide__hole.has-target::after {
  opacity: 1;
}

@keyframes pbGuidePulse {
  50% {
    opacity: 0.4;
  }
}

/* --- Panah penunjuk --- */
.pb-guide__arrow {
  position: fixed;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  transform: translateX(-50%);
  color: var(--primary-color, #00aaff);
  pointer-events: none;
  animation: pbGuideBob 1.5s ease-in-out infinite;
}

.pb-guide__arrow-hint {
  padding: 3px 9px;
  border-radius: 20px;
  background: rgba(0, 170, 255, 0.14);
  border: 1px solid rgba(0, 170, 255, 0.4);
  font-size: 0.68em;
  font-weight: 700;
  white-space: nowrap;
  color: #d9f2ff;
}

.pb-guide__arrow-icon {
  width: 22px;
  height: 22px;
}

.pb-guide__arrow.is-up {
  flex-direction: column-reverse;
}

.pb-guide__arrow.is-up .pb-guide__arrow-icon {
  transform: rotate(180deg);
}

@keyframes pbGuideBob {
  50% {
    transform: translateX(-50%) translateY(5px);
  }
}

/* --- Kursor peraga: meluncur ke tombol lalu "menekan"-nya --- */
.pb-guide__pointer {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 3;
  width: 24px;
  height: 24px;
  margin: -6px 0 0 -6px;
  pointer-events: none;
  transition: transform 0.75s cubic-bezier(0.4, 0, 0.2, 1);
}

.pb-guide__pointer.is-instant {
  transition: none;
}

.pb-guide__pointer-arrow {
  width: 22px;
  height: 22px;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.6));
}

.pb-guide__pointer-ring {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 34px;
  height: 34px;
  margin: -17px 0 0 -17px;
  border-radius: 50%;
  border: 2px solid var(--primary-color, #00aaff);
  opacity: 0;
  transform: scale(0.35);
}

.pb-guide__pointer.is-press .pb-guide__pointer-ring {
  animation: pbGuidePress 0.55s ease-out;
}

@keyframes pbGuidePress {
  0% {
    opacity: 0.9;
    transform: scale(0.35);
  }
  100% {
    opacity: 0;
    transform: scale(1.25);
  }
}

/* --- Kartu langkah --- */
.pb-guide__card {
  position: relative;
  z-index: 4;
  width: min(430px, 100%);
  /* Dibatasi ruang bebas di sisi sasaran (--pb-guide-ruang, dihitung
     taruhSorot()) supaya kartu tidak pernah menutupi peraga yang sedang jalan;
     kalau isinya tetap lebih tinggi, kartunya digulung, bukan terpotong. */
  max-height: min(
    calc(var(--pb-guide-ruang, 100vh) - var(--pb-guide-sisa)),
    calc(100vh - 48px)
  );
  overflow-y: auto;
  margin-bottom: 24px;
  padding: 20px 22px 18px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--surface-border);
  border-top: 2px solid var(--primary-color, #00aaff);
  background: rgba(12, 14, 20, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.65);
  pointer-events: auto;
  animation: pbGuideIn 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

.pb-guide.is-card-top .pb-guide__card {
  margin-bottom: 0;
  margin-top: 24px;
}

@keyframes pbGuideIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
}

.pb-guide__step {
  margin: 0 0 8px;
  font-size: 0.66em;
  font-weight: 700;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.4);
  font-variant-numeric: tabular-nums;
}

.pb-guide__title {
  margin: 0 0 8px;
  font-size: 1.15em;
  line-height: 1.25;
  color: #fff;
  background: linear-gradient(135deg, var(--primary-color, #00aaff), #7b68ee);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.pb-guide__body {
  margin: 0 0 14px;
  font-size: 0.82em;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.78);
}

/* Butir petunjuk di dalam satu langkah */
.pb-guide__list {
  display: block;
  margin: 0 0 14px;
  padding-left: 18px;
  font-size: 0.82em;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.78);
}

.pb-guide__list li {
  margin-bottom: 6px;
}

.pb-guide__list li:last-child {
  margin-bottom: 0;
}

.pb-guide__list li::marker {
  color: var(--primary-color, #00aaff);
}

.pb-guide__demo-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 14px;
  padding: 7px 14px;
  border-radius: 20px;
  border: 1px solid rgba(0, 170, 255, 0.4);
  background: rgba(0, 170, 255, 0.12);
  color: #d9f2ff;
  font-family: "Poppins", sans-serif;
  font-size: 0.76em;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.25s ease;
}

.pb-guide__demo-btn:hover {
  background: rgba(0, 170, 255, 0.22);
}

.pb-guide__dots {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 14px;
}

.pb-guide__dot {
  width: 16px;
  height: 3px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.16);
  transition: background-color 0.3s ease;
}

.pb-guide__dot.is-active {
  background: var(--primary-color, #00aaff);
}

.pb-guide__actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

.pb-guide__skip,
.pb-guide__back,
.pb-guide__next {
  font-family: "Poppins", sans-serif;
  font-size: 0.78em;
  cursor: pointer;
  border-radius: 20px;
  transition: background-color 0.25s ease, color 0.25s ease,
    border-color 0.25s ease, box-shadow 0.25s ease;
}

.pb-guide__back {
  margin-right: auto;
  padding: 8px 15px;
  border: 1px solid var(--surface-border-strong);
  background: var(--surface-1);
  color: rgba(255, 255, 255, 0.75);
}

.pb-guide__back:hover {
  background: var(--surface-2);
  color: #fff;
}

.pb-guide__skip {
  padding: 8px 14px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 20px;
  background: var(--surface-1);
  color: #e2e8f0;
  font-weight: 500;
  letter-spacing: 0.02em;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.pb-guide__skip:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.35);
  color: #ffffff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.pb-guide__next {
  padding: 8px 18px;
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--primary-color, #00aaff), #7b68ee);
  color: #fff;
  font-weight: 700;
}

.pb-guide__next:hover {
  filter: brightness(1.12);
}

.pb-guide__skip:focus-visible,
.pb-guide__back:focus-visible,
.pb-guide__next:focus-visible,
.pb-guide__demo-btn:focus-visible {
  outline: 2px solid var(--primary-color, #00aaff);
  outline-offset: 2px;
}

/* --- Tombol "?" di toolbar katalog --- */
.bookshelf-help {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--surface-border-strong);
  background: var(--surface-1);
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.85em;
  cursor: pointer;
  transition: background-color 0.25s ease, color 0.25s ease,
    border-color 0.25s ease;
}

.bookshelf-help:hover {
  background: rgba(0, 170, 255, 0.16);
  border-color: rgba(0, 170, 255, 0.45);
  color: #d9f2ff;
}

.bookshelf-help:focus-visible {
  outline: 2px solid var(--primary-color, #00aaff);
  outline-offset: 2px;
}

/* --- Layar sempit --- */
@media (max-width: 480px) {
  .pb-guide {
    padding: 12px;
    /* padding 12 + margin kartu 12 + 4px jarak aman */
    --pb-guide-sisa: 28px;
  }

  .pb-guide__card {
    margin-bottom: 12px;
    padding: 16px 16px 14px;
  }

  .pb-guide.is-card-top .pb-guide__card {
    margin-top: 12px;
  }

  .pb-guide__title {
    font-size: 1.02em;
  }

  .pb-guide__body {
    font-size: 0.78em;
  }

  .pb-guide__list {
    font-size: 0.78em;
    padding-left: 16px;
  }

  .pb-guide__actions {
    gap: 6px;
  }

  .pb-guide__skip {
    padding: 7px 11px;
    font-size: 0.76em;
  }

  .pb-guide__back {
    padding: 7px 12px;
    font-size: 0.76em;
  }

  .pb-guide__next {
    padding: 7px 15px;
    font-size: 0.76em;
  }
}

/* --- Hemat gerak --- */
@media (prefers-reduced-motion: reduce) {
  .pb-guide__hole,
  .pb-guide__pointer {
    transition: none;
  }

  .pb-guide__hole::after,
  .pb-guide__arrow {
    animation: none;
  }

  .pb-guide__card {
    animation: none;
  }

  .pb-guide__pointer.is-press .pb-guide__pointer-ring {
    animation: none;
  }
}