/* ============================================
   FELIZ CUMPLEAÑOS JOSEFINA
   Diseño romántico en tonalidades beige
   ============================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400;1,600&family=Lora:ital,wght@0,400;0,500;0,600;1,400;1,500&family=Dancing+Script:wght@400;500;600;700&display=swap');

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Paleta Beige */
  --cream-light:   #FBF8F4;
  --cream:         #F5F0EB;
  --beige:         #E8DDD3;
  --nude:          #D4C5B5;
  --cafe-latte:    #C4A882;
  --tostado:       #B8956A;
  --brown-soft:    #A07850;
  --gold:          #D4AF37;
  --gold-light:    #E8CC6E;
  --rose-blush:    #E8C4B8;
  --rose-deep:     #D4A08A;
  --text-dark:     #5C4A3A;
  --text-medium:   #7A6655;
  --text-light:    #9B8A7A;

  /* Tipografía */
  --font-display:  'Playfair Display', Georgia, serif;
  --font-body:     'Lora', Georgia, serif;
  --font-script:   'Dancing Script', cursive;

  /* Espaciado */
  --section-padding: 4rem 1.5rem;

  /* Transiciones */
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
}

/* Scroll bloqueado hasta que se complete el progreso */
body.scroll-locked {
  overflow: hidden;
  height: 100vh;
  height: 100dvh;
}

body {
  font-family: var(--font-body);
  background-color: var(--cream-light);
  color: var(--text-dark);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ---------- Utilidades ---------- */
.section-divider {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  margin: 1rem auto;
  border: none;
}

.hidden-section {
  opacity: 0;
  transform: translateY(40px);
  pointer-events: none;
  transition: opacity 0.8s var(--ease-smooth), transform 0.8s var(--ease-smooth);
}

.hidden-section.revealed {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* ---------- Floating Hearts Background ---------- */
.floating-hearts {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.floating-heart {
  position: absolute;
  color: var(--rose-blush);
  opacity: 0.12;
  animation: floatUp linear infinite;
  font-size: 1rem;
}

@keyframes floatUp {
  0% {
    transform: translateY(100vh) rotate(0deg) scale(1);
    opacity: 0;
  }
  10% {
    opacity: 0.12;
  }
  90% {
    opacity: 0.12;
  }
  100% {
    transform: translateY(-10vh) rotate(360deg) scale(0.5);
    opacity: 0;
  }
}

/* ---------- SECTION 1: Header ---------- */

/* Locked viewport: contiene hero + corazón mientras se completa el progreso */
.locked-viewport {
  height: 100vh;
  height: 100dvh;
  overflow-y: auto;
  overflow-x: hidden;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

body:not(.scroll-locked) .locked-viewport {
  height: auto;
  overflow: visible;
}

.hero {
  position: relative;
  min-height: 85vh;
  min-height: 85dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.5rem 2rem;
  text-align: center;
  z-index: 1;
  background: linear-gradient(
    180deg,
    var(--cream-light) 0%,
    var(--cream) 40%,
    var(--beige) 100%
  );
}

/* Scroll hint arrow */
.scroll-hint {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  text-decoration: none;
  animation: bounceDown 2s ease-in-out infinite;
}

.scroll-hint-arrow {
  font-size: 2rem;
  color: var(--cafe-latte);
  opacity: 0.6;
  display: block;
  line-height: 1;
}

@keyframes bounceDown {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
    ellipse at 50% 30%,
    rgba(212, 175, 55, 0.06) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.hero-name {
  font-family: var(--font-script);
  font-size: clamp(3.5rem, 12vw, 6rem);
  font-weight: 700;
  color: var(--brown-soft);
  text-shadow: 0 2px 20px rgba(184, 149, 106, 0.2);
  margin-bottom: 0.2rem;
  animation: fadeInDown 1.2s var(--ease-smooth) both;
  letter-spacing: 2px;
}

.hero-subtitle {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 4vw, 1.8rem);
  font-weight: 400;
  font-style: italic;
  color: var(--text-medium);
  letter-spacing: 3px;
  text-transform: lowercase;
  animation: fadeInUp 1.2s var(--ease-smooth) 0.3s both;
}

.hero-sparkle {
  font-size: 1.5rem;
  margin-top: 0.8rem;
  animation: fadeInUp 1.2s var(--ease-smooth) 0.6s both;
  color: var(--gold);
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-30px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- SECTION 2: Corazón Interactivo ---------- */
.heart-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.5rem 4rem;
  z-index: 1;
  background: linear-gradient(180deg, var(--beige) 0%, var(--cream) 100%);
}

.heart-instruction {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--text-light);
  font-style: italic;
  margin-bottom: 1.5rem;
  animation: pulse 2.5s ease-in-out infinite;
}

.heart-container {
  position: relative;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.heart-main {
  font-size: 6rem;
  color: var(--rose-deep);
  filter: drop-shadow(0 4px 20px rgba(212, 160, 138, 0.4));
  transition: transform 0.15s var(--ease-bounce), filter 0.3s ease;
  display: block;
}

.heart-container:active .heart-main {
  transform: scale(0.85);
}

.heart-main.beat {
  animation: heartBeat 0.5s var(--ease-bounce);
}

@keyframes heartBeat {
  0%   { transform: scale(1); }
  15%  { transform: scale(1.25); }
  30%  { transform: scale(0.95); }
  45%  { transform: scale(1.15); }
  100% { transform: scale(1); }
}

@keyframes pulse {
  0%, 100% { opacity: 0.6; }
  50%      { opacity: 1; }
}

/* Mini corazones que salen al tocar */
.mini-heart {
  position: absolute;
  font-size: 1.2rem;
  color: var(--rose-blush);
  pointer-events: none;
  animation: miniFloat 1s var(--ease-smooth) forwards;
}

@keyframes miniFloat {
  0% {
    opacity: 1;
    transform: translate(0, 0) scale(1) rotate(0deg);
  }
  100% {
    opacity: 0;
    transform: translate(var(--tx), var(--ty)) scale(0.3) rotate(var(--rot));
  }
}

/* Mensaje romántico */
.romantic-message {
  font-family: var(--font-script);
  font-size: clamp(1.3rem, 5vw, 1.8rem);
  color: var(--brown-soft);
  text-align: center;
  margin-top: 1.5rem;
  min-height: 3rem;
  transition: opacity 0.4s ease;
  max-width: 320px;
}

.romantic-message.changing {
  opacity: 0;
  transform: translateY(5px);
}

/* Barra de progreso */
.progress-wrapper {
  width: 100%;
  max-width: 280px;
  margin-top: 2rem;
}

.progress-label {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--text-light);
  text-align: center;
  margin-bottom: 0.5rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.progress-bar-track {
  width: 100%;
  height: 8px;
  background-color: rgba(196, 168, 130, 0.2);
  border-radius: 100px;
  overflow: hidden;
  position: relative;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--cafe-latte), var(--gold));
  border-radius: 100px;
  transition: width 0.5s var(--ease-smooth);
  position: relative;
}

.progress-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.3) 50%,
    transparent 100%
  );
  animation: shimmer 2s ease-in-out infinite;
}

@keyframes shimmer {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.progress-percent {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--cafe-latte);
  text-align: center;
  margin-top: 0.4rem;
  font-weight: 600;
}

/* ---------- SECTION 3: Sobre / Carta ---------- */
.letter-section {
  padding: var(--section-padding);
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 1;
  position: relative;
  background: linear-gradient(180deg, var(--cream) 0%, var(--cream-light) 50%, var(--cream) 100%);
}

.letter-title {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 5vw, 1.8rem);
  color: var(--brown-soft);
  font-style: italic;
  margin-bottom: 2rem;
  text-align: center;
}

/* Envelope */
.envelope-wrapper {
  perspective: 800px;
  width: 100%;
  max-width: 340px;
}

.envelope {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

/* Cuerpo del sobre */
.envelope-body {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 75%;
  background: linear-gradient(135deg, var(--beige) 0%, var(--nude) 100%);
  border-radius: 0 0 12px 12px;
  box-shadow:
    0 4px 20px rgba(92, 74, 58, 0.1),
    inset 0 -2px 0 rgba(196, 168, 130, 0.3);
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
}

.envelope-seal {
  width: 45px;
  height: 45px;
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  box-shadow: 0 2px 10px rgba(212, 175, 55, 0.3);
  transition: transform 0.3s var(--ease-bounce), box-shadow 0.3s ease;
}

.envelope:hover .envelope-seal {
  transform: scale(1.1);
  box-shadow: 0 4px 20px rgba(212, 175, 55, 0.5);
}

/* Solapa del sobre */
.envelope-flap {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 55%;
  background: linear-gradient(180deg, var(--nude) 0%, var(--beige) 100%);
  clip-path: polygon(0 0, 50% 70%, 100% 0);
  z-index: 3;
  transform-origin: top center;
  transition: transform 0.7s var(--ease-smooth);
  box-shadow: 0 2px 10px rgba(92, 74, 58, 0.08);
}

.envelope.open .envelope-flap {
  transform: rotateX(180deg);
  z-index: 1;
}

/* Tap hint */
.envelope-hint {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--text-light);
  font-style: italic;
  margin-top: 1rem;
  animation: pulse 2.5s ease-in-out infinite;
  transition: opacity 0.4s ease;
}

.envelope.open ~ .envelope-hint {
  opacity: 0;
}

/* Carta desplegable */
.letter-content {
  width: 100%;
  max-width: 340px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.8s var(--ease-smooth), margin-top 0.5s ease, opacity 0.6s ease;
  opacity: 0;
  margin-top: 0;
}

.letter-content.open {
  max-height: 2000px;
  margin-top: 2rem;
  opacity: 1;
}

.letter-paper {
  background: linear-gradient(
    180deg,
    #FFFCF7 0%,
    #FFF9F0 100%
  );
  border-radius: 12px;
  padding: 2rem 1.5rem;
  box-shadow:
    0 2px 20px rgba(92, 74, 58, 0.08),
    0 0 0 1px rgba(196, 168, 130, 0.15);
  position: relative;
  overflow: hidden;
}

.letter-paper::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--gold), var(--cafe-latte), var(--gold));
}

.letter-greeting {
  font-family: var(--font-script);
  font-size: 1.6rem;
  color: var(--brown-soft);
  margin-bottom: 1rem;
}

.letter-body {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-dark);
  line-height: 1.9;
}

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

.letter-signature {
  font-family: var(--font-script);
  font-size: 1.4rem;
  color: var(--cafe-latte);
  text-align: right;
  margin-top: 1.5rem;
}

/* ---------- SECTION 4: Galería / Carrusel ---------- */
.gallery-section {
  padding: 4rem 0;
  z-index: 1;
  position: relative;
  background: linear-gradient(180deg, var(--cream) 0%, var(--beige) 50%, var(--cream) 100%);
  overflow: hidden;
}

.gallery-title {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 5vw, 1.8rem);
  color: var(--brown-soft);
  font-style: italic;
  text-align: center;
  margin-bottom: 0.5rem;
  padding: 0 1.5rem;
}

.gallery-subtitle {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--text-light);
  text-align: center;
  margin-bottom: 2rem;
  font-style: italic;
}

.carousel-container {
  position: relative;
  width: 100%;
  padding: 0 1rem;
}

.carousel-track {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: 1rem 1.5rem;
}

.carousel-track::-webkit-scrollbar {
  display: none;
}

.carousel-slide {
  flex: 0 0 75vw;
  max-width: 300px;
  scroll-snap-align: center;
  border-radius: 16px;
  overflow: hidden;
  background: var(--cream-light);
  box-shadow:
    0 4px 20px rgba(92, 74, 58, 0.1),
    0 0 0 1px rgba(196, 168, 130, 0.1);
  transition: transform 0.3s var(--ease-smooth), box-shadow 0.3s ease;
}

.carousel-slide:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(92, 74, 58, 0.15);
}

.carousel-slide img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  display: block;
}

.carousel-slide-caption {
  padding: 0.8rem 1rem;
  text-align: center;
  font-family: var(--font-script);
  font-size: 1rem;
  color: var(--text-medium);
}

/* Indicadores del carrusel */
.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 1.5rem;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--nude);
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  padding: 0;
}

.carousel-dot.active {
  background-color: var(--cafe-latte);
  transform: scale(1.3);
}

/* Flechas del carrusel */
.carousel-nav {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 1rem;
}

.carousel-arrow {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1.5px solid var(--nude);
  background: rgba(255, 252, 247, 0.8);
  color: var(--text-medium);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all 0.3s ease;
  -webkit-tap-highlight-color: transparent;
}

.carousel-arrow:hover {
  background: var(--beige);
  border-color: var(--cafe-latte);
  color: var(--brown-soft);
}

/* ---------- SECTION 5: Cierre Emotivo ---------- */
.closing-section {
  padding: 4rem 1.5rem 5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  z-index: 1;
  position: relative;
  background: linear-gradient(180deg, var(--cream) 0%, var(--beige) 60%, var(--cream-light) 100%);
}

.closing-text {
  font-family: var(--font-script);
  font-size: clamp(1.6rem, 6vw, 2.4rem);
  color: var(--brown-soft);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.closing-heart {
  font-size: 1.5rem;
  margin: 1rem 0 2rem;
  animation: pulse 2s ease-in-out infinite;
  color: var(--rose-deep);
}

.closing-photo-frame {
  width: 100%;
  max-width: 300px;
  border-radius: 16px;
  overflow: hidden;
  background: var(--cream-light);
  box-shadow:
    0 4px 30px rgba(92, 74, 58, 0.12),
    0 0 0 3px rgba(212, 175, 55, 0.15),
    0 0 0 6px rgba(212, 175, 55, 0.05);
  position: relative;
}

.closing-photo-frame img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
}

/* Placeholder para fotos */
.photo-placeholder {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: linear-gradient(135deg, var(--beige) 0%, var(--nude) 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-style: italic;
  gap: 0.5rem;
}

.photo-placeholder.square {
  aspect-ratio: 1 / 1;
}

.photo-placeholder-icon {
  font-size: 2rem;
  opacity: 0.5;
}

/* ---------- Confetti / Hearts Rain ---------- */
.confetti-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1000;
  overflow: hidden;
}

.confetti-piece {
  position: absolute;
  top: -20px;
  opacity: 0;
  animation: confettiFall linear forwards;
}

@keyframes confettiFall {
  0% {
    opacity: 1;
    transform: translateY(0) rotate(0deg) scale(1);
  }
  80% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translateY(100vh) rotate(var(--rot)) scale(0.5);
  }
}

/* ---------- Scroll Reveal Animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease-smooth), transform 0.7s var(--ease-smooth);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Footer sutil ---------- */
.footer {
  padding: 2rem 1.5rem;
  text-align: center;
  background: var(--cream-light);
  z-index: 1;
  position: relative;
}

.footer-text {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--text-light);
  letter-spacing: 1px;
  font-style: italic;
}

/* ---------- Responsive ---------- */
@media (min-width: 768px) {
  .carousel-slide {
    flex: 0 0 40vw;
    max-width: 350px;
  }
  
  .letter-paper {
    padding: 2.5rem 2rem;
  }
}

@media (min-width: 1024px) {
  .hero {
    padding: 6rem 2rem;
  }
  
  .carousel-slide {
    flex: 0 0 30vw;
    max-width: 380px;
  }
  
  .envelope-wrapper {
    max-width: 400px;
  }
  
  .letter-content {
    max-width: 500px;
  }
}

/* ---------- Accessibility ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}