/* Podstránka /ebook/ – prodejní stránka e-booku o Vectricu.
   Vlastní tmavé navy/oranžové schéma, načítá se navíc k assets/css/styles.css
   a přepisuje jen proměnné pro tuto stránku (ostatní stránky nejsou dotčené). */

body.ebook-page {
  --bg: #0a1220;
  /* Stejná modrá jako v hlavičce/navigaci zbytku webu (assets/css/styles.css --bg: #154387). */
  --navy: #154387;
  --navy-deep: #0b2c63;
  --accent: #F5921E;
  --panel: rgba(21, 67, 135, 0.2);
  background:
    radial-gradient(1100px 520px at 15% -10%, rgba(21, 67, 135, 0.45), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(245, 146, 30, 0.12), transparent 55%),
    var(--bg);
}

body.ebook-page header {
  background: rgba(10, 18, 32, 0.92);
  border-bottom: 1px solid rgba(27, 75, 155, 0.5);
}

body.ebook-page .dropdown-menu {
  background: #0e1a30;
}

/* ---------- Obecné prvky stránky ---------- */

.ebook-eyebrow {
  display: inline-block;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.8rem;
  margin-bottom: 0.6rem;
}

.ebook-hero {
  padding: 3.2rem 0 2.5rem;
  display: grid;
  gap: 1rem;
  max-width: 46rem;
}

.ebook-hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  line-height: 1.12;
  margin: 0;
}

.ebook-subtitle {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.82);
  max-width: 42rem;
  margin: 0;
}

.ebook-price-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.ebook-price-old {
  font-size: 1.3rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.5);
  text-decoration: line-through;
}

.ebook-price {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--accent);
}

.ebook-price small {
  font-size: 1rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.7);
  margin-left: 0.3rem;
}


.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid var(--accent);
  transition: all 0.25s ease;
}

.btn-primary {
  background: var(--accent);
  color: #1a1102;
}

.btn-primary:hover {
  color: #1a1102;
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(245, 146, 30, 0.35);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
}

.btn-ghost:hover {
  color: var(--text);
  background: rgba(245, 146, 30, 0.12);
  transform: translateY(-2px);
}

.ebook-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.4rem;
  margin-top: 0.6rem;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
}

/* ---------- Sekce ---------- */

.ebook-section {
  padding: 2.6rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.ebook-section h2 {
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  margin: 0 0 1.5rem;
}

.ebook-section .section-lead {
  max-width: 56ch;
  color: rgba(255, 255, 255, 0.78);
  margin: -0.8rem 0 1.6rem;
}

/* ---------- 3D kniha (scroll animace) ----------
   Čitelnost textu: obsah kapitol leží na .book-spread, která se NEotáčí (jen
   mírné naklonění scény) – text tak zůstává čitelný po celou dobu, jakmile
   se překlopí přední deska a listy pryč. Otáčí se jen deska a dva
   prázdné (beztextové) listy, takže perspektivní zkreslení nikdy nepostihne
   čitelný text. Modrá barva desky = stejná --navy jako hlavička webu. */

.book-scene {
  perspective: 1700px;
  padding: 1rem 0;
  display: flex;
  justify-content: center;
}

.book {
  position: relative;
  width: min(340px, 84vw);
  height: min(430px, 106vw);
  transform-style: preserve-3d;
  transform: rotateY(-10deg) rotateX(3deg);
}

.book-back,
.book-page,
.book-cover-front,
.book-spread {
  position: absolute;
  inset: 0;
  border-radius: 4px 10px 10px 4px;
  transform-origin: left center;
  backface-visibility: hidden;
}

.book-back {
  background: linear-gradient(135deg, var(--navy-deep), var(--navy));
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.55);
  transform: translateZ(-8px);
}

.book-page {
  background: #f4efe4;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.08);
}

.book-page1 { transform: translateZ(-2px) rotateY(0deg); }
.book-page2 { transform: translateZ(-4px) rotateY(0deg); }

.book-cover-front {
  background: linear-gradient(155deg, var(--navy), var(--navy-deep));
  border: 1px solid rgba(245, 146, 30, 0.35);
  box-shadow: 0 26px 50px rgba(0, 0, 0, 0.55);
  transform: translateZ(6px) rotateY(0deg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.4rem;
}

.book-cover-title {
  color: #fff;
  font-weight: 800;
  text-align: center;
  line-height: 1.28;
  font-size: 1.3rem;
  letter-spacing: 0.02em;
}

.book-cover-title .accent {
  display: block;
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  margin-top: 0.6rem;
}

/* Dvoustránka s obsahem – zůstává téměř plochá, aby byl text vždy čitelný */
.book-spread {
  background: #f4efe4;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.08), 0 20px 40px rgba(0, 0, 0, 0.35);
  transform: translateZ(-6px);
  display: flex;
  opacity: 0;
  overflow: hidden;
}

.spread-page {
  flex: 1 1 50%;
  min-width: 0;
  padding: 0.9rem 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.spread-crease {
  flex: 0 0 auto;
  width: 2px;
  background: linear-gradient(rgba(0, 0, 0, 0.18), rgba(0, 0, 0, 0.05));
}

.spread-title {
  display: block;
  color: var(--navy-deep);
  font-size: 0.8rem;
  font-weight: 800;
  line-height: 1.25;
}

.spread-subtitle {
  display: block;
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.15rem;
}

.spread-chapters {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.spread-chapters li {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  color: #16233f;
  font-size: 0.76rem;
  line-height: 1.3;
}

.spread-chapters em {
  flex: 0 0 auto;
  font-style: normal;
  font-weight: 800;
  color: var(--accent);
  font-size: 0.72rem;
}

.spread-more {
  margin-top: auto;
  padding-top: 0.4rem;
  color: var(--navy-deep);
  font-weight: 700;
  font-size: 0.7rem;
}

.book-hint {
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

/* Statická/zjednodušená varianta – prefers-reduced-motion a stránky bez JS podpory animace */
.book-static .book {
  transform: rotateY(-14deg) rotateX(2deg);
}

.book-static .book-cover-front {
  transform: translateZ(6px) rotateY(-150deg);
}

.book-static .book-page1 { transform: translateZ(-2px) rotateY(-125deg); }
.book-static .book-page2 { transform: translateZ(-4px) rotateY(-110deg); }

.book-static .book-spread { opacity: 1; }

/* ---------- Pro koho / co se naučíte ---------- */

.benefit-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
}

.benefit-card {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  padding: 1.2rem;
}

.benefit-card .icon {
  color: var(--accent);
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

/* ---------- Seznam kapitol ---------- */

.chapter-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.chapter-list li {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 0.8rem 1rem;
}

.chapter-num {
  flex: 0 0 auto;
  font-weight: 800;
  color: var(--accent);
  font-size: 0.95rem;
  min-width: 2ch;
}

.chapter-title {
  color: rgba(255, 255, 255, 0.9);
}

/* ---------- Ukázka zdarma ---------- */

.sample-box {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
  background: linear-gradient(120deg, rgba(27, 75, 155, 0.35), rgba(245, 146, 30, 0.12));
  border: 1px solid rgba(245, 146, 30, 0.4);
  border-radius: 16px;
  padding: 1.6rem;
}

.sample-box p { margin: 0.3rem 0 0; color: rgba(255, 255, 255, 0.78); max-width: 46ch; }

/* ---------- O autorovi ---------- */

.author-box {
  display: flex;
  gap: 1.2rem;
  align-items: flex-start;
  flex-wrap: wrap;
}

.author-badge {
  flex: 0 0 auto;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--navy);
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
}

.author-box p { margin: 0.4rem 0 0; color: rgba(255, 255, 255, 0.8); max-width: 62ch; }

/* ---------- FAQ ---------- */

.faq-item {
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  background: var(--panel);
  margin-bottom: 0.7rem;
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  padding: 1rem 1.2rem;
  font-weight: 700;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: "+";
  color: var(--accent);
  font-size: 1.3rem;
  line-height: 1;
  flex: 0 0 auto;
}

.faq-item[open] summary::after { content: "−"; }

.faq-item .faq-answer {
  padding: 0 1.2rem 1.1rem;
  color: rgba(255, 255, 255, 0.78);
  margin: 0;
}

/* ---------- Opakovaná výzva ---------- */

.cta-repeat {
  text-align: center;
  padding: 3rem 0;
}

.cta-repeat h2 { margin: 0 0 0.4rem; }
.cta-repeat p { margin: 0 0 1.4rem; color: rgba(255, 255, 255, 0.75); }

/* ---------- Mobil: zjednodušení ---------- */

@media (max-width: 640px) {
  .book-scene { perspective: 1200px; }

  .book {
    width: min(300px, 88vw);
    height: min(560px, 148vw);
    transform: rotateY(-6deg) rotateX(2deg);
  }

  /* Na mobilu jde dvoustránka pod sebe – sloupce po stranách by byly na
     tak úzkém displeji nečitelné. */
  .book-spread { flex-direction: column; }
  .spread-crease { width: 100%; height: 2px; }
  .spread-page { padding: 0.8rem 0.9rem; }
  .spread-title { font-size: 0.85rem; }
  .spread-chapters li { font-size: 0.8rem; }

  .book-static .book { transform: rotateY(-8deg) rotateX(1deg); }

  .sample-box { flex-direction: column; align-items: flex-start; }
}

/* Blok s ukázkou zdarma je skrytý, dokud neexistuje PDF (viz ebook.js). */
.ebook-section[hidden] { display: none; }