/* Mode slaid + skrin penuh. Guna token dari style.css. */

.deck-trigger {
  margin-left: 12px; flex: 0 0 auto; cursor: pointer;
  font-family: var(--font-sans); font-size: 12px; font-weight: 700;
  color: var(--night); background: var(--gold); border: 0; border-radius: 99px;
  padding: 6px 14px; transition: background 0.2s, transform 0.15s;
}
.deck-trigger:hover { background: var(--gold-bright); }
.deck-trigger:active { transform: scale(0.96); }

body.deck-open { overflow: hidden; }

.deck {
  position: fixed; inset: 0; z-index: 1000;
  background: var(--night); display: flex; flex-direction: column;
}
.deck:fullscreen { background: var(--night); }

/* transisi sinematik bila masuk skrin penuh */
.deck-fs-enter { animation: deckFsIn 0.6s var(--ease-out); }
@keyframes deckFsIn { 0% { transform: scale(0.975); } 100% { transform: scale(1); } }
.deck-fs-enter::after {
  content: ''; position: absolute; inset: 0; z-index: 5; pointer-events: none;
  background: linear-gradient(115deg, transparent 34%, rgba(255, 255, 255, 0.07) 50%, transparent 66%);
  transform: translateX(-100%); animation: deckSweep 0.85s ease 0.08s;
}
@keyframes deckSweep { to { transform: translateX(100%); } }

/* top: progress + meta */
.deck-prog { height: 3px; background: rgba(255, 255, 255, 0.1); flex: 0 0 auto; }
/* p2 — AUDIT §5: bar ni dikemas kini pada SETIAP tekan anak panah, jadi
   animasi `width` cetus layout+paint tiap frame semasa presenter klik laju.
   scaleX beri hasil sama atas GPU. (Bar kemajuan lain dlm repo kekal guna
   width — ia bergerak sekali bila pengguna tanda langkah, bukan per-frame,
   dan ia ada border-radius yg akan herot bawah scale.) */
.deck-prog i { display: block; height: 100%; width: 100%; background: var(--gold);
  transform-origin: left; transform: scaleX(0); transition: transform 0.35s var(--ease-out); }
.deck-meta { display: flex; align-items: center; gap: 10px; padding: 11px 16px; flex: 0 0 auto; }
.deck-title { font-family: var(--font-display); font-weight: 700; font-size: 13px; color: var(--cream); }
.deck-count { font-family: var(--font-mono); font-size: 12px; color: rgba(245, 245, 245, 0.55); margin-right: auto; }
.deck-btn {
  cursor: pointer; background: transparent; border: 1px solid var(--line); color: var(--cream);
  width: 34px; height: 34px; border-radius: 9px; font-size: 15px; line-height: 1; transition: background-color 0.2s, border-color 0.2s, color 0.2s;
}
.deck-btn:hover { border-color: var(--gold); color: var(--gold-bright); }
.deck-btn.on { background: var(--gold); color: var(--night); border-color: var(--gold); }

/* stage + slides */
.deck-stage { flex: 1; position: relative; overflow: hidden; }
.deck-slide {
  position: absolute; inset: 0; overflow-y: auto; overflow-x: hidden;
  padding: 30px max(20px, 4vw) 44px;
  display: none; flex-direction: column; align-items: center;
}
/* p2 — AUDIT §1: tukar slaid ialah tindakan PAPAN KEKUNCI (anak panah/space,
   slides.js onKey) yang ditekan berpuluh kali dalam satu sesi mengajar. Dulu
   setiap tekan main semula deckIn 0.35s — presenter tunggu perisian tiap kali
   dia bercakap, dan @keyframes mula semula dari sifar bila anak panah ditekan
   bertalu-talu (berkelip). Sekarang navigasi TIADA animasi.
   Kesan "persembahan bermula" masa masuk skrin penuh DIKEKALKAN di bawah —
   itu jarang berlaku, jadi delight yang sah. */
.deck-slide.on { display: flex; }
.deck.deck-fs-enter .deck-slide.on { animation: deckIn 0.35s var(--ease-out); }
/* flex-shrink:0 WAJIB — tanpa ni item overflow:hidden (.demo0) mampat & clip kandungan */
.deck-slide > * { width: 100%; max-width: 820px; flex-shrink: 0; }
/* rapatkan jarak dlm mode slaid supaya modul pendek muat penuh */
.deck-slide h2.module { margin: 0 0 6px; }
.deck-slide h3 { margin: 14px 0 6px; }
.deck-slide p { margin: 8px 0; }
.deck-slide ul, .deck-slide ol { margin: 8px 0 8px 22px; }
.deck-slide table { margin: 10px 0; }
.deck-slide .tip, .deck-slide .warn, .deck-slide .note { margin: 10px 0; }
.deck-slide .demo0 { margin: 12px 0 8px; }
.deck-slide .step { margin: 12px 0; }
.deck-slide .lesson-head { padding-top: 8px; }
.deck-slide h1 { font-size: clamp(30px, 5vw, 46px); }
/* neutralkan reveal-js supaya kandungan tak tersembunyi dlm slaid */
.deck-slide .reveal-js { opacity: 1 !important; transform: none !important; }
/* buang nav dalaman yg tak relevan dlm slaid */
.deck-slide .lesson-nav, .deck-slide .ln-reset { display: none; }
@keyframes deckIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

/* tanda skrol bila slaid lebih tinggi dari skrin */
.deck-fade {
  position: absolute; left: 0; right: 0; bottom: 0; height: 66px; z-index: 4; pointer-events: none;
  display: flex; align-items: flex-end; justify-content: center; padding-bottom: 8px;
  background: linear-gradient(180deg, transparent, var(--night) 88%);
  opacity: 0; transition: opacity 0.25s;
}
.deck.more-below .deck-fade { opacity: 1; }
.deck-fade span {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; color: var(--gold-bright);
  animation: deckBob 1.5s ease-in-out infinite;
}
@keyframes deckBob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(3px); } }

/* nav bawah */
.deck-nav { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-top: 1px solid var(--line); flex: 0 0 auto; }
.deck-arrow {
  cursor: pointer; font-family: var(--font-sans); font-weight: 600; font-size: 13px; color: var(--cream);
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 10px 18px; transition: background-color 0.2s, border-color 0.2s, opacity 0.2s;
}
.deck-arrow:hover:not(:disabled) { border-color: rgba(255, 77, 0, 0.5); }
.deck-arrow.next { margin-left: auto; background: var(--gold); color: var(--night); border-color: var(--gold); }
.deck-arrow.next:hover:not(:disabled) { background: var(--gold-bright); }
.deck-arrow:disabled { opacity: 0.3; cursor: not-allowed; }
.deck-dots { display: flex; gap: 7px; justify-content: center; flex-wrap: wrap; margin: 0 auto; }
.deck-dot { width: 8px; height: 8px; border-radius: 50%; background: rgba(255, 255, 255, 0.2); border: 0; cursor: pointer; padding: 0; transition: background-color 0.2s, transform 0.2s var(--ease-out); }
.deck-dot:hover { background: rgba(255, 255, 255, 0.4); }
.deck-dot.on { background: var(--gold); transform: scale(1.35); }

@media (max-width: 560px) {
  .deck-slide { padding: 22px 16px 40px; }
  .deck-arrow { padding: 9px 13px; font-size: 12px; }
  .deck-title { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  /* p2 — pemilih .deck.deck-fs-enter .deck-slide.on lebih SPESIFIK dari
     .deck-slide.on, jadi ia mesti disenarai eksplisit di sini; kalau tidak
     kesan skrin penuh tetap main walaupun pengguna minta kurang gerakan. */
  .deck-slide.on,
  .deck.deck-fs-enter .deck-slide.on { animation: none; }
  .deck-prog i { transition: none; }
  .deck-fs-enter { animation: none; }
  .deck-fs-enter::after { display: none; }
  .deck-fade span { animation: none; }
}