@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,700;1,400&family=Lato:wght@300;400&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --cream: #fdf6ee;
  --brown: #7c5c3e;
  --gold: #c9a96e;
  --dark: #2c1f14;
  --soft: #f0e6d3;
  --wood-1: #2b1d12;
  --wood-2: #1a120b;
  --ink: #3a2b1f;
}

body {
  background:
    radial-gradient(circle at 20% 15%, rgba(255, 225, 170, 0.08), transparent 45%),
    radial-gradient(circle at 80% 85%, rgba(255, 205, 135, 0.06), transparent 40%),
    linear-gradient(145deg, var(--wood-1), var(--wood-2));
  font-family: 'Lato', sans-serif;
  overflow: hidden;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #f2e3cf;
}

/* ══════════════════════════════════════════
   PORTADA
══════════════════════════════════════════ */
#cover {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 10% 15%, rgba(255, 214, 153, 0.08), transparent 45%),
    radial-gradient(circle at 90% 85%, rgba(255, 176, 87, 0.07), transparent 40%),
    linear-gradient(135deg, #2e1a10, #140b07);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 100;
  transition: opacity 0.8s ease;
}

#cover::before {
  content: '';
  position: absolute;
  width: min(560px, 88vw);
  height: min(78vh, 700px);
  border-radius: 10px 18px 18px 10px;
  background:
    linear-gradient(145deg, #5f3a24, #3e2415);
  box-shadow:
    inset 0 0 0 1px rgba(255, 221, 180, 0.25),
    inset 0 0 40px rgba(0, 0, 0, 0.35),
    0 22px 60px rgba(0, 0, 0, 0.65);
  z-index: -1;
}

#cover::after {
  content: '';
  position: absolute;
  width: min(560px, 88vw);
  height: min(78vh, 700px);
  border-radius: 10px 18px 18px 10px;
  background:
    linear-gradient(to right, rgba(20, 10, 6, 0.8) 0 14px, transparent 14px 100%);
  pointer-events: none;
  z-index: -1;
}

#cover h1 {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2.1rem, 6vw, 4.2rem);
  color: #f2d6a6;
  text-align: center;
  letter-spacing: 3px;
  text-shadow: 0 2px 0 rgba(0, 0, 0, 0.2), 0 8px 24px rgba(0, 0, 0, 0.45);
  animation: fadeUp 1.5s ease forwards;
  opacity: 0;
}

#cover p {
  color: #a08060;
  margin-top: 1rem;
  font-size: 1rem;
  letter-spacing: 2px;
  animation: fadeUp 1.5s ease 0.5s forwards;
  opacity: 0;
}

.open-btn {
  margin-top: 3rem;
  padding: 0.8rem 2.5rem;
  border: 1px solid var(--gold);
  color: var(--gold);
  background: transparent;
  font-family: 'Lato', sans-serif;
  font-size: 0.9rem;
  letter-spacing: 3px;
  cursor: pointer;
  transition: all 0.3s;
  animation: fadeUp 1.5s ease 1s forwards;
  opacity: 0;
  text-transform: uppercase;
}

.open-btn:hover {
  background: var(--gold);
  color: var(--dark);
}

/* ── Corazones flotantes portada ── */
.hearts {
  position: absolute;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
}

.heart-particle {
  position: absolute;
  bottom: -20px;
  font-size: 1.2rem;
  animation: floatUp linear infinite;
  opacity: 0;
}

/* ══════════════════════════════════════════
   PROGRESS BAR
══════════════════════════════════════════ */
#progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--gold);
  transition: width 0.4s ease;
  z-index: 50;
}

/* ══════════════════════════════════════════
   PAGE COUNTER
══════════════════════════════════════════ */
#page-counter {
  position: fixed;
  top: 1rem;
  right: 1.5rem;
  color: #a08060;
  font-size: 0.8rem;
  letter-spacing: 2px;
  z-index: 50;
}

/* ══════════════════════════════════════════
   BOOK WRAPPER
══════════════════════════════════════════ */
#book-wrapper {
  display: none;
  width: 100vw;
  height: 100vh;
  position: relative;
  align-items: center;
  justify-content: center;
  perspective: 1800px;
}

#book-wrapper::before {
  content: '';
  position: absolute;
  width: min(650px, 96vw);
  height: min(88vh, 760px);
  border-radius: 10px 14px 14px 10px;
  background:
    linear-gradient(to right, rgba(65, 41, 25, 0.9) 0 14px, rgba(83, 55, 35, 0.65) 14px 22px, rgba(30, 20, 12, 0.35) 22px 100%);
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.55),
    inset 0 0 0 1px rgba(231, 196, 146, 0.16);
  z-index: 0;
  pointer-events: none;
}

/* ══════════════════════════════════════════
   PÁGINAS
══════════════════════════════════════════ */
.page {
  display: none;
  position: absolute;
  width: min(520px, 92vw);
  min-height: 70vh;
  max-height: 85vh;
  background:
    linear-gradient(135deg, #fffaf0 0%, #f8ecd8 100%);
  border-radius: 4px 12px 12px 4px;
  border: 1px solid #e2cfad;
  padding: 3rem 2.5rem 2.5rem;
  box-shadow:
    -8px 0 18px rgba(0, 0, 0, 0.34),
     8px 0 28px rgba(0, 0, 0, 0.45),
    inset 0 0 0 1px rgba(255, 255, 255, 0.4),
    inset -3px 0 10px rgba(0, 0, 0, 0.08);
  animation: pageIn 0.5s ease forwards;
  overflow-y: auto;
  z-index: 2;
}

.page.active {
  display: block;
}

/* Estados para transición tipo hoja */
.page.turn-out-next,
.page.turn-out-prev,
.page.turn-in-next,
.page.turn-in-prev {
  animation: none !important;
  transform: none !important;
  opacity: 1 !important;
}

/* Lomo del libro */
.page::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 8px;
  background: linear-gradient(to right, #b9915d, #ead9ba);
  border-radius: 4px 0 0 4px;
}

.page::after {
  content: '';
  position: absolute;
  left: 20px;
  right: 18px;
  top: 20px;
  bottom: 20px;
  border: 1px solid rgba(177, 137, 82, 0.16);
  pointer-events: none;
}

/* ── Número de página ── */
.page-num {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  font-size: 0.7rem;
  color: #b09070;
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* ── Badge de fecha ── */
.date-badge {
  display: inline-block;
  background: var(--soft);
  border: 1px solid var(--gold);
  color: var(--brown);
  font-size: 0.75rem;
  padding: 0.25rem 0.8rem;
  border-radius: 20px;
  letter-spacing: 1px;
  margin-bottom: 1.2rem;
}

/* ── Título del capítulo ── */
.chapter-title {
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.3rem, 4vw, 1.8rem);
  color: var(--dark);
  line-height: 1.3;
  margin-bottom: 1.5rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid #ddd0c0;
}

/* ── Cuerpo de texto ── */
.page-body {
  color: #4a3728;
  font-size: 0.95rem;
  line-height: 1.9;
  font-weight: 300;
}

.page-body p {
  margin-bottom: 1rem;
}

/* ── Caja de detalle ── */
.detail-box {
  background: var(--soft);
  border-left: 3px solid var(--gold);
  padding: 0.8rem 1rem;
  margin: 1.2rem 0;
  border-radius: 0 6px 6px 0;
  font-size: 0.88rem;
  color: var(--brown);
  font-style: italic;
}

.detail-box strong {
  display: block;
  font-style: normal;
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.3rem;
}

/* ── Video en página ── */
.video-box {
  margin: 1.2rem 0;
}

.story-video {
  width: 100%;
  display: block;
  border-radius: 10px;
  border: 1px solid #d8c3a0;
  background: #000;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.18);
}

.photo-box {
  margin: 1.2rem 0;
}

.story-photo {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
  border: 1px solid #d8c3a0;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.18);
  object-fit: cover;
}

/* Página 7 - galería compacta y visualmente atractiva */
.p7-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  margin: 1rem 0 0.6rem;
}

.p7-photo-box {
  margin: 0;
  border-radius: 14px;
  overflow: hidden;
  background: linear-gradient(145deg, #fff8ec, #f3e2c8);
  border: 1px solid rgba(201, 169, 110, 0.45);
  box-shadow:
    0 10px 20px rgba(0, 0, 0, 0.14),
    inset 0 0 0 1px rgba(255, 255, 255, 0.45);
}

.p7-photo {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  transition: transform 0.25s ease, filter 0.25s ease;
  filter: saturate(1.04) contrast(1.03);
}

.p7-photo:hover {
  transform: scale(1.04);
  filter: saturate(1.12) contrast(1.06);
}

/* Página 4 - imagen más pequeña para evitar scroll */
.p4-photo-box {
  margin: 0.8rem 0 0.4rem;
}

.p4-photo {
  width: min(100%, 260px);
  max-height: 190px;
  margin: 0 auto;
  object-fit: contain;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  transition: transform 0.25s ease, filter 0.25s ease;
}

.p4-photo:hover {
  transform: translateY(-2px) scale(1.03);
  filter: saturate(1.08) contrast(1.04);
}

/* ── Cierre de página ── */
.closing {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px dashed #d0c0a8;
  font-family: 'Playfair Display', serif;
  font-style: italic;
  color: var(--brown);
  font-size: 0.9rem;
  text-align: center;
}

/* ══════════════════════════════════════════
   PÁGINA DE PROPUESTA (última)
══════════════════════════════════════════ */
.proposal-page {
  text-align: center;
  position: relative;
}

.big-question {
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.5rem, 5vw, 2.2rem);
  color: var(--dark);
  line-height: 1.4;
  margin: 1.5rem 0 2rem;
}

/* ── Botones de propuesta ── */
.btn-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1.5rem;
  position: relative;
  min-height: 80px;
}

.btn-yes {
  padding: 0.9rem 2.5rem;
  background: var(--gold);
  color: var(--dark);
  border: none;
  border-radius: 30px;
  font-family: 'Playfair Display', serif;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(201, 169, 110, 0.4);
}

.btn-yes:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 25px rgba(201, 169, 110, 0.6);
}

.btn-no {
  padding: 0.9rem 2rem;
  background: transparent;
  color: #b09070;
  border: 1px solid #d0c0a8;
  border-radius: 30px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: left 0.2s ease, top 0.2s ease;
  font-family: 'Lato', sans-serif;
}

.btn-no:hover {
  color: #8a6a50;
}

/* ══════════════════════════════════════════
   PANTALLA DE SÍ
══════════════════════════════════════════ */
#yes-screen {
  display: none;
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 210, 140, 0.08), transparent 45%),
    radial-gradient(circle at 80% 80%, rgba(255, 175, 90, 0.06), transparent 40%),
    linear-gradient(135deg, #26170f, #0e0805);
  z-index: 200;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

#yes-screen .big-heart {
  font-size: 5rem;
  display: block;
  margin-bottom: 1rem;
  animation: pulse 1.5s ease infinite, fadeUp 1s ease 0.2s forwards;
  opacity: 0;
}

#yes-screen h2 {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2rem, 7vw, 4rem);
  color: var(--gold);
  animation: fadeUp 1s ease forwards;
  opacity: 0;
}

#yes-screen p {
  color: #c8a87a;
  margin-top: 1.5rem;
  font-size: 1.1rem;
  max-width: 400px;
  line-height: 1.8;
  animation: fadeUp 1s ease 0.5s forwards;
  opacity: 0;
}

/* ══════════════════════════════════════════
   NAVEGACIÓN
══════════════════════════════════════════ */
.nav-area {
  position: fixed;
  bottom: 2rem;
  display: flex;
  gap: 1rem;
  z-index: 50;
}

.nav-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1px solid #8a6238;
  background: linear-gradient(145deg, rgba(60, 35, 20, 0.95), rgba(29, 17, 10, 0.95));
  color: #e4c08a;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow:
    0 8px 18px rgba(0, 0, 0, 0.35),
    inset 0 0 0 1px rgba(255, 218, 160, 0.15);
  backdrop-filter: blur(4px);
}

.nav-btn:hover {
  background: var(--gold);
  color: var(--dark);
  border-color: var(--gold);
}

.nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* ══════════════════════════════════════════
   SCROLLBAR PERSONALIZADO
══════════════════════════════════════════ */
.page::-webkit-scrollbar {
  width: 4px;
}

.page::-webkit-scrollbar-track {
  background: transparent;
}

.page::-webkit-scrollbar-thumb {
  background: var(--gold);
  border-radius: 2px;
}

/* ══════════════════════════════════════════
   ANIMACIONES
══════════════════════════════════════════ */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pageIn {
  from {
    opacity: 0;
    transform: rotateY(-8deg) translateX(30px);
  }
  to {
    opacity: 1;
    transform: rotateY(0) translateX(0);
  }
}

/* Transición unificada tipo portada -> primera página */
@keyframes pageFadeOut {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(10px);
  }
}

@keyframes pageFadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes floatUp {
  0% {
    transform: translateY(0) rotate(0deg);
    opacity: 0.6;
  }
  100% {
    transform: translateY(-110vh) rotate(360deg);
    opacity: 0;
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
}

/* ══════════════════════════════════════════
   RESPONSIVE MÓVIL
══════════════════════════════════════════ */
@media (max-width: 480px) {
  .page {
    padding: 2.5rem 1.5rem 2rem;
  }

  .chapter-title {
    font-size: 1.3rem;
  }

  .page-body {
    font-size: 0.9rem;
  }

  .nav-btn {
    width: 42px;
    height: 42px;
    font-size: 1rem;
  }

  .btn-yes {
    padding: 0.8rem 2rem;
    font-size: 1rem;
  }

  #yes-screen h2 {
    font-size: 2.5rem;
  }

  #yes-screen .big-heart {
    font-size: 4rem;
  }

  .p7-gallery {
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }

  .p7-photo {
    aspect-ratio: 16 / 10;
  }

  .p4-photo {
    width: min(100%, 220px);
    max-height: 160px;
    object-fit: contain;
  }
}

@media (max-width: 360px) {
  .page {
    padding: 2rem 1.2rem 1.5rem;
  }

  .open-btn {
    padding: 0.7rem 1.8rem;
    font-size: 0.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page.turn-out-next,
  .page.turn-out-prev,
  .page.turn-in-next,
  .page.turn-in-prev {
    animation: none !important;
    transform: none !important;
    opacity: 1 !important;
  }
}