:root {
  --color-blue-universe: #04050e;
  --color-deep-blue: #080d28;
  --color-tech-blue: #00d2ff;
  --color-dev-blue: #ff0055;
  --color-spark-yellow: #ffcc00;
  --color-magic-purple: #b900ff;
  --color-new-black: #050508;
  --color-white-snow: #f4f5f6;
  
  /* Tokusatsu Theme Neon Colors */
  --neon-cyan: #00ffcc;
  --neon-red: #ff0044;
  --neon-blue: #1f53e5;
  --neon-gold: #ffe600;
  --neon-purple: #8e1fe5;
}

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

body {
  background-color: var(--color-new-black);
  background-image: 
    radial-gradient(circle at center, rgba(255, 0, 85, 0.12) 0%, rgba(8, 13, 40, 0.4) 60%, var(--color-new-black) 100%),
    linear-gradient(rgba(0, 255, 204, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 204, 0.02) 1px, transparent 1px);
  background-size: 100% 100%, 30px 30px, 30px 30px;
  color: var(--color-new-black);
  font-family: 'Inter', sans-serif;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  position: relative;
}

/* Sound & Control UI */
.sound-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(255, 0, 85, 0.1);
  border: 1px solid rgba(255, 0, 85, 0.4);
  color: var(--color-white-snow);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  cursor: pointer;
  z-index: 100;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 10px rgba(255, 0, 85, 0.2);
}

.sound-btn:hover {
  background: var(--color-dev-blue);
  border-color: var(--color-white-snow);
  box-shadow: 0 0 15px rgba(255, 0, 85, 0.8);
  transform: scale(1.05);
}

.hidden {
  display: none !important;
}

/* Navigation UI */
.nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(5, 5, 8, 0.75);
  border: 1px solid var(--neon-cyan);
  color: var(--color-white-snow);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  cursor: pointer;
  z-index: 10005 !important;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 0.7;
  box-shadow: 0 0 10px rgba(0, 255, 204, 0.3);
  pointer-events: auto !important;
}

.nav-btn:hover {
  opacity: 1;
  background: var(--color-deep-blue);
  border-color: var(--neon-cyan);
  box-shadow: 0 0 25px rgba(0, 255, 204, 0.8);
  transform: translateY(-50%) scale(1.1);
}

.nav-btn-left {
  left: 30px;
}

.nav-btn-right {
  right: 30px;
}

/* Album Layout Container */
.album-viewport {
  position: relative;
  width: 1100px;
  height: 800px;
  display: flex;
  justify-content: center;
  align-items: center;
  perspective: 1500px;
}

.flip-book {
  box-shadow: 0 35px 90px rgba(0, 0, 0, 0.85);
  border-radius: 8px;
  overflow: hidden;
  background-color: transparent;
  display: none; /* Shown after initialization */
}

/* Individual Pages */
.page {
  width: 550px;
  height: 800px;
  background-color: #0b0c16; /* Fundo interno escuro cyber */
  background-image: radial-gradient(circle at center, #0f1228 0%, #080914 100%);
  overflow: hidden;
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  border: 1px solid rgba(255, 255, 255, 0.03);
  
  /* Aceleração de Hardware 3D para GPU Mobile */
  will-change: transform;
  transform: translate3d(0, 0, 0);
  -webkit-transform: translate3d(0, 0, 0);
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.page:active {
  cursor: grabbing;
}

/* Global dragging cursor override */
body.dragging, 
body.dragging * {
  cursor: grabbing !important;
  user-select: none !important;
  -webkit-user-select: none !important;
}

.page-content {
  width: 100%;
  height: 100%;
  padding: 45px 40px;
  display: flex;
  flex-direction: column;
  position: relative;
  
  /* Garantir renderização via GPU */
  transform: translate3d(0, 0, 0);
  -webkit-transform: translate3d(0, 0, 0);
}

/* Page Lombada Crease Shadows */
.page:nth-child(even):not(:last-child) .page-content::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 30px;
  height: 100%;
  background: linear-gradient(to right, rgba(0,0,0,0) 0%, rgba(0, 0, 0, 0.3) 70%, rgba(0, 0, 0, 0.5) 100%);
  pointer-events: none;
  z-index: 10;
}

.page:nth-child(odd):not(:first-child) .page-content::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 30px;
  height: 100%;
  background: linear-gradient(to left, rgba(0,0,0,0) 0%, rgba(0, 0, 0, 0.3) 70%, rgba(0, 0, 0, 0.5) 100%);
  pointer-events: none;
  z-index: 10;
}

/* Page Header & Badge */
.page-header {
  margin-bottom: 25px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-bottom: 2px solid rgba(0, 255, 204, 0.15);
  padding-bottom: 12px;
}

.tech-badge {
  align-self: flex-start;
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-family: 'Press Start 2P', monospace;
  font-weight: 700;
  color: var(--color-white-snow);
  letter-spacing: 1px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
  text-shadow: 0 0 5x rgba(255,255,255,0.4);
}
.badge-ia { background-color: var(--neon-red); box-shadow: 0 0 12px rgba(255, 0, 68, 0.4); }
.badge-python { background-color: var(--neon-blue); box-shadow: 0 0 12px rgba(31, 83, 229, 0.4); }
.badge-db { background-color: var(--neon-gold); color: #000; box-shadow: 0 0 12px rgba(255, 230, 0, 0.4); text-shadow: none; }
.badge-os { background-color: var(--neon-purple); box-shadow: 0 0 12px rgba(142, 31, 229, 0.4); }
.badge-brasil { background-color: var(--neon-cyan); color: #000; box-shadow: 0 0 12px rgba(0, 255, 204, 0.4); text-shadow: none; }

.page-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-white-snow);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Stickers Grid Layout */
.stickers-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(3, auto);
  gap: 16px;
  flex: 1;
}

/* Individual Sticker Slots */
.sticker-slot {
  background-color: rgba(255, 255, 255, 0.01);
  border: 2px dashed rgba(0, 255, 204, 0.25);
  border-radius: 6px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  min-height: 155px;
}

.sticker-slot:hover {
  background-color: rgba(0, 255, 204, 0.03);
  border-color: var(--neon-cyan);
  box-shadow: inset 0 0 12px rgba(0, 255, 204, 0.15);
}

.special-slot {
  grid-column: span 2;
  justify-self: center;
  width: 65%;
  min-height: 165px;
  border-color: var(--neon-gold);
  border-style: double;
  border-width: 3px;
  background-color: rgba(255, 230, 0, 0.01);
}

.special-slot:hover {
  background-color: rgba(255, 230, 0, 0.03);
  border-color: #fff;
  box-shadow: 
    inset 0 0 15px rgba(255, 230, 0, 0.25),
    0 0 10px rgba(255, 230, 0, 0.15);
}

.slot-number {
  font-family: 'Press Start 2P', monospace;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--neon-cyan);
  background: rgba(0, 255, 204, 0.08);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
  transition: all 0.3s ease;
  border: 1px solid rgba(0, 255, 204, 0.25);
}

.special-slot .slot-number {
  color: var(--neon-gold);
  background: rgba(255, 230, 0, 0.08);
  border-color: rgba(255, 230, 0, 0.25);
}

.sticker-slot:hover .slot-number {
  background: var(--neon-cyan);
  color: var(--color-new-black);
  box-shadow: 0 0 12px rgba(0, 255, 204, 0.6);
  border-color: var(--color-white-snow);
}

.special-slot:hover .slot-number {
  background: var(--neon-gold);
  color: var(--color-new-black);
  box-shadow: 0 0 12px rgba(255, 230, 0, 0.6);
  border-color: var(--color-white-snow);
}

.slot-name {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--color-white-snow);
  margin-bottom: 4px;
}

.slot-role {
  font-size: 0.68rem;
  color: #8fa0b5;
  line-height: 1.25;
}

/* ===================================================
   FIGURINHAS PREENCHIDAS
   =================================================== */

.sticker-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  border-radius: 4px;
  opacity: 0;
  animation: sticker-aparecer 0.5s ease-out forwards;
}

/* Slot com imagem: remove padding e corta o overflow */
.sticker-slot:has(.sticker-img) {
  padding: 0;
  overflow: hidden;
}

/* Esconde número e role quando há imagem no slot */
.sticker-slot:has(.sticker-img) .slot-number,
.sticker-slot:has(.sticker-img) .slot-role {
  display: none;
}

/* Nome como overlay centralizado na base da imagem */
.sticker-slot:has(.sticker-img) .slot-name {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2;
  text-align: center;
  color: #fff;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 18px 8px 7px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, transparent 100%);
  border-radius: 0 0 4px 4px;
  letter-spacing: 0.2px;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.6);
  pointer-events: none;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Animação de "colar" a figurinha */
@keyframes sticker-aparecer {
  from {
    opacity: 0;
    transform: scale(0.92) translateY(-4px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* Slot quando a figurinha está colada (imagem carregou com sucesso) */
.slot-preenchido {
  border-style: solid !important;
  border-color: var(--neon-cyan) !important;
  box-shadow: 0 0 8px rgba(0, 255, 204, 0.25);
}

.special-slot.slot-preenchido {
  border-color: var(--neon-gold) !important;
  box-shadow: 
    0 0 15px rgba(255, 230, 0, 0.35),
    inset 0 0 10px rgba(255, 230, 0, 0.15) !important;
}

.slot-preenchido:hover {
  border-color: #fff !important;
  box-shadow: 0 4px 20px rgba(0, 255, 204, 0.4) !important;
}

.special-slot.slot-preenchido:hover {
  box-shadow: 
    0 4px 25px rgba(255, 230, 0, 0.6),
    inset 0 0 15px rgba(255, 230, 0, 0.2) !important;
}

/* Page Footer */
.page-footer {
  margin-top: 15px;
  font-size: 0.75rem;
  font-family: 'Press Start 2P', monospace;
  color: #556272;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid rgba(0, 255, 204, 0.1);
  padding-top: 10px;
}

/* CAPA (Cover) CSS */
.page-cover {
  background-color: #06070c;
  background-image: 
    radial-gradient(circle at center, rgba(255, 0, 68, 0.25) 0%, #06070c 100%),
    linear-gradient(rgba(255, 0, 68, 0.05) 1.5px, transparent 1.5px),
    linear-gradient(90deg, rgba(255, 0, 68, 0.05) 1.5px, transparent 1.5px);
  background-size: 100% 100%, 25px 25px, 25px 25px;
  color: var(--color-white-snow);
  border: 4px solid var(--neon-red);
  box-shadow: inset 0 0 50px rgba(255, 0, 68, 0.4), 0 0 30px rgba(255, 0, 68, 0.2);
}

.cover-content {
  justify-content: space-between;
  align-items: center;
  padding: 60px 40px;
  text-align: center;
}

.cover-seal {
  background: rgba(255, 230, 0, 0.08);
  border: 1.5px solid var(--neon-gold);
  color: var(--neon-gold);
  font-family: 'Press Start 2P', monospace;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 2px;
  padding: 8px 18px;
  border-radius: 4px;
  box-shadow: 0 0 15px rgba(255, 230, 0, 0.45);
  display: inline-block;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
}

.cover-seal::before {
  content: '';
  position: absolute;
  top: 0;
  left: -50%;
  width: 200%;
  height: 100%;
  background: linear-gradient(to right, transparent, rgba(255, 230, 0, 0.45), transparent);
  transform: skewX(-30deg);
  animation: sealShine 5s infinite linear;
}

@keyframes sealShine {
  0% { left: -150%; }
  100% { left: 150%; }
}

.cover-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

/* Glitch Typography Effect */
.glitch {
  position: relative;
  color: var(--color-white-snow);
}

.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: transparent;
}

.glitch::before {
  left: 3px;
  text-shadow: -2px 0 var(--neon-red);
  clip: rect(44px, 450px, 56px, 0);
  animation: glitch-anim 5s infinite linear alternate-reverse;
}

.glitch::after {
  left: -3px;
  text-shadow: -2px 0 var(--neon-cyan), 0 1px var(--neon-cyan);
  clip: rect(85px, 450px, 140px, 0);
  animation: glitch-anim2 5s infinite linear alternate-reverse;
}

@keyframes glitch-anim {
  0% { clip: rect(31px, 9999px, 94px, 0); }
  10% { clip: rect(112px, 9999px, 76px, 0); }
  20% { clip: rect(85px, 9999px, 5px, 0); }
  30% { clip: rect(27px, 9999px, 115px, 0); }
  45% { clip: rect(73px, 9999px, 29px, 0); }
  55% { clip: rect(118px, 9999px, 141px, 0); }
  70% { clip: rect(9px, 9999px, 52px, 0); }
  85% { clip: rect(104px, 9999px, 120px, 0); }
  100% { clip: rect(135px, 9999px, 18px, 0); }
}

@keyframes glitch-anim2 {
  0% { clip: rect(76px, 9999px, 116px, 0); }
  12% { clip: rect(3px, 9999px, 42px, 0); }
  25% { clip: rect(122px, 9999px, 88px, 0); }
  38% { clip: rect(94px, 9999px, 149px, 0); }
  50% { clip: rect(18px, 9999px, 64px, 0); }
  65% { clip: rect(108px, 9999px, 5px, 0); }
  80% { clip: rect(31px, 9999px, 92px, 0); }
  100% { clip: rect(52px, 9999px, 110px, 0); }
}

.cover-title {
  font-family: 'Outfit', sans-serif;
  font-size: 3.6rem;
  font-weight: 800;
  letter-spacing: 3px;
  color: var(--color-white-snow);
  margin: 0;
  line-height: 1;
  text-shadow: 0 0 15px rgba(255, 0, 68, 0.6);
}

.cover-subtitle {
  font-family: 'Press Start 2P', monospace;
  font-size: 0.95rem;
  letter-spacing: 1px;
  color: var(--neon-gold);
  margin-top: 8px;
  margin-bottom: 25px;
  text-shadow: 0 0 12px rgba(255, 230, 0, 0.5);
}

.cover-art {
  position: relative;
  width: 250px;
  height: 290px;
  border: 2px solid var(--neon-red);
  border-radius: 12px;
  background: rgba(4, 5, 14, 0.95);
  box-shadow: 0 20px 45px rgba(0,0,0,0.95), inset 0 0 25px rgba(255, 0, 68, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 15px;
}

.art-grid {
  position: absolute;
  width: 100%;
  height: 100%;
  background-size: 20px 20px;
  background-image: 
    linear-gradient(to right, rgba(255, 0, 68, 0.12) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 0, 68, 0.12) 1px, transparent 1px);
}

/* Floating Mini Cards Collage */
.mini-card {
  position: absolute;
  width: 52px;
  height: 70px;
  background: rgba(5, 5, 8, 0.95);
  border: 1.5px solid var(--neon-red);
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 6px 4px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.6), inset 0 0 8px rgba(255, 0, 68, 0.15);
  z-index: 2;
  transition: all 0.3s ease;
}

.mini-card:hover {
  border-color: var(--neon-gold);
  box-shadow: 0 0 15px rgba(255, 230, 0, 0.8);
  transform: scale(1.15) translateY(-5px) !important;
  z-index: 6;
}

.mc-avatar {
  font-family: 'Press Start 2P', monospace;
  font-weight: 800;
  font-size: 0.42rem;
  color: var(--neon-red);
  background: rgba(255, 0, 68, 0.1);
  border: 1px solid rgba(255, 0, 68, 0.3);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mc-num {
  font-family: monospace;
  font-size: 0.6rem;
  color: rgba(255, 255, 255, 0.6);
}

.mc-turing {
  top: 25px;
  left: 25px;
  transform: rotate(-12deg);
  animation: floatCard1 6s infinite ease-in-out;
}

.mc-guido {
  bottom: 25px;
  left: 20px;
  transform: rotate(8deg);
  animation: floatCard2 7s infinite ease-in-out;
  border-color: var(--neon-red);
}
.mc-guido .mc-avatar {
  color: var(--neon-red);
  background: rgba(255, 0, 85, 0.1);
  border-color: rgba(255, 0, 85, 0.3);
}

.mc-jobs {
  top: 85px;
  right: 20px;
  transform: rotate(15deg);
  animation: floatCard3 6.5s infinite ease-in-out;
  border-color: var(--neon-gold);
}
.mc-jobs .mc-avatar {
  color: var(--neon-gold);
  background: rgba(255, 230, 0, 0.1);
  border-color: rgba(255, 230, 0, 0.3);
}

@keyframes floatCard1 {
  0%, 100% { transform: rotate(-12deg) translateY(0); }
  50% { transform: rotate(-10deg) translateY(-6px); }
}

@keyframes floatCard2 {
  0%, 100% { transform: rotate(8deg) translateY(0); }
  50% { transform: rotate(6deg) translateY(-4px); }
}

@keyframes floatCard3 {
  0%, 100% { transform: rotate(15deg) translateY(0); }
  50% { transform: rotate(18deg) translateY(-5px); }
}

/* Central Glowing 3D Tech Sphere */
.tech-sphere {
  position: relative;
  width: 110px;
  height: 110px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3;
}

.sphere-core {
  width: 66px;
  height: 66px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--neon-red) 0%, #030306 100%);
  box-shadow: 0 0 25px rgba(255, 0, 68, 0.95), inset 0 0 10px rgba(255, 255, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
  animation: spherePulse 4s infinite ease-in-out;
}

.art-logo {
  width: 32px;
  height: 32px;
  stroke: var(--color-white-snow);
  stroke-width: 2;
  fill: none;
}

.sphere-ring {
  position: absolute;
  width: 100%;
  height: 100%;
  border: 1.5px solid rgba(255, 230, 0, 0.45);
  border-radius: 50%;
  pointer-events: none;
}

.sphere-ring.ring-1 {
  transform: rotateX(70deg) rotateY(15deg);
  animation: spinRing1 8s infinite linear;
  border-top-color: transparent;
}

.sphere-ring.ring-2 {
  transform: rotateX(15deg) rotateY(70deg);
  animation: spinRing2 8s infinite linear;
  border-bottom-color: transparent;
  border-left-color: var(--neon-cyan);
}

@keyframes spherePulse {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 0 25px rgba(255, 0, 68, 0.95);
  }
  50% {
    transform: scale(1.08);
    box-shadow: 0 0 40px rgba(255, 0, 68, 1);
  }
}

@keyframes spinRing1 {
  0% { transform: rotateX(70deg) rotateY(15deg) rotateZ(0deg); }
  100% { transform: rotateX(70deg) rotateY(15deg) rotateZ(360deg); }
}

@keyframes spinRing2 {
  0% { transform: rotateX(15deg) rotateY(70deg) rotateZ(360deg); }
  100% { transform: rotateX(15deg) rotateY(70deg) rotateZ(0deg); }
}

.cover-footer-text {
  margin-top: 25px;
  font-size: 0.75rem;
  letter-spacing: 2px;
  color: var(--color-white-snow);
  opacity: 0.7;
}

.cover-footer {
  font-size: 0.7rem;
  font-family: 'Press Start 2P', monospace;
  letter-spacing: 1px;
  color: var(--color-white-snow);
  opacity: 0.4;
}

/* CREDITS PAGE CSS */
.credits-content {
  background-color: var(--color-deep-blue);
  background-image: radial-gradient(circle at center, #0f1228 0%, #080914 100%);
  color: var(--color-white-snow);
  border: 1px solid rgba(0, 255, 204, 0.15);
}

.credits-body {
  display: flex;
  flex-direction: column;
  gap: 20px;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-white-snow);
}

.info-box {
  background: rgba(0, 255, 204, 0.03);
  border-left: 4px solid var(--neon-cyan);
  padding: 20px;
  border-radius: 0 8px 8px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-top: 1px solid rgba(0, 255, 204, 0.05);
  border-bottom: 1px solid rgba(0, 255, 204, 0.05);
  border-right: 1px solid rgba(0, 255, 204, 0.05);
}

.info-box h4 {
  font-family: 'Outfit', sans-serif;
  color: var(--color-white-snow);
  text-transform: uppercase;
  font-size: 1.1rem;
}

.info-box ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.info-box li {
  position: relative;
  padding-left: 20px;
}

.info-box li::before {
  content: "•";
  color: var(--neon-cyan);
  font-weight: bold;
  font-size: 1.2rem;
  position: absolute;
  left: 0;
  top: -2px;
}

.credits-dedication {
  font-style: italic;
  color: var(--neon-gold);
  text-align: center;
  margin-top: 15px;
}

/* CONTRACAPA (Back Cover) CSS */
.page-cover-back {
  background-color: #06070c;
  background-image: 
    radial-gradient(circle at center, rgba(255, 0, 68, 0.25) 0%, #06070c 100%),
    linear-gradient(rgba(255, 0, 68, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 0, 68, 0.05) 1px, transparent 1px);
  background-size: 100% 100%, 30px 30px, 30px 30px;
  color: var(--color-white-snow);
  border: 4px solid var(--neon-red);
  box-shadow: 
    inset 0 0 50px rgba(255, 0, 68, 0.4),
    0 0 35px rgba(255, 0, 68, 0.25);
}

.cover-back-content {
  justify-content: space-between;
  align-items: center;
  padding: 60px 40px;
  text-align: center;
}

.cover-back-header h2 {
  font-family: 'Outfit', sans-serif;
  font-size: 2.2rem;
  letter-spacing: 4px;
  background: linear-gradient(to right, #FFFFFF, var(--neon-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 10px rgba(255, 230, 0, 0.4);
}

.cover-back-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 25px;
  width: 100%;
}

.tech-logo-collage {
  font-size: 0.72rem;
  font-family: 'Press Start 2P', monospace;
  letter-spacing: 1.5px;
  color: var(--neon-gold);
  opacity: 0.9;
  text-shadow: 0 0 8px rgba(255, 230, 0, 0.3);
}

.summary-text {
  font-size: 0.9rem;
  line-height: 1.6;
  opacity: 0.8;
  max-width: 85%;
  color: #a4b4c7;
}

.barcode-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  background: #FFFFFF;
  padding: 12px 20px;
  border-radius: 4px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.5);
}

.barcode {
  display: flex;
  align-items: flex-end;
  height: 40px;
  gap: 2px;
}

.bar {
  width: 3px;
  height: 100%;
  background: #000;
}

.bar.thin {
  width: 1.5px;
}

.bar.thick {
  width: 5px;
}

.barcode-number {
  font-family: monospace;
  font-size: 0.75rem;
  color: #000;
}

.cover-back-footer {
  font-size: 0.75rem;
  letter-spacing: 2px;
  opacity: 0.5;
}

/* Responsiveness & Mobile Adaptations */
@media (max-width: 1200px) {
  .album-viewport {
    width: 900px;
    height: 650px;
  }
  .page-content {
    padding: 30px;
  }
  .sticker-slot {
    min-height: 120px;
  }
  .special-slot {
    min-height: 130px;
  }
  .slot-number {
    width: 38px;
    height: 38px;
    font-size: 1.4rem;
  }
  .cover-title {
    font-size: 3rem;
  }
  .cover-subtitle {
    font-size: 1.4rem;
  }
  .cover-art {
    width: 170px;
    height: 220px;
  }
  .tech-sphere {
    transform: scale(0.75);
  }
  .mini-card {
    width: 38px;
    height: 52px;
    padding: 4px 2px;
  }
  .mc-avatar {
    width: 18px;
    height: 18px;
    font-size: 0.5rem;
  }
  .mc-num {
    font-size: 0.5rem;
  }
  .mc-turing {
    top: 15px;
    left: 15px;
  }
  .mc-guido {
    bottom: 15px;
    left: 10px;
  }
  .mc-jobs {
    top: 55px;
    right: 10px;
  }
}

@media (max-width: 768px) {
  /* In portrait/mobile mode, StPageFlip will show single pages */
  .album-viewport {
    width: 100%;
    max-width: 480px;
    height: 100%;
    min-height: 580px;
    padding: 10px;
  }
  .page-content {
    padding: 25px 20px;
  }
  .page-header {
    margin-bottom: 15px;
  }
  .page-title {
    font-size: 1.3rem;
  }
  .stickers-grid {
    gap: 10px;
  }
  .sticker-slot {
    min-height: 100px;
    padding: 6px;
  }
  .special-slot {
    min-height: 110px;
    width: 90%;
  }
  .slot-number {
    width: 32px;
    height: 32px;
    font-size: 1.1rem;
    margin-bottom: 5px;
  }
  .slot-name {
    font-size: 0.8rem;
  }
  .slot-role {
    font-size: 0.65rem;
  }
  .cover-content {
    padding: 30px 15px;
  }
  .cover-title {
    font-size: 2.5rem;
  }
  .cover-art {
    width: 130px;
    height: 180px;
  }
  .tech-sphere {
    transform: scale(0.65);
  }
  .mini-card {
    display: none !important;
  }
  .nav-btn {
    width: 44px;
    height: 44px;
    opacity: 0.4;
  }
  .nav-btn-left {
    left: 10px;
  }
  .nav-btn-right {
    right: 10px;
  }
  .sound-btn {
    top: 10px;
    right: 10px;
    width: 40px;
    height: 40px;
  }
}

/* Restart / Voltar ao Inicio Button (Contracapa) */
.restart-container {
  margin: 30px 0 15px 0;
  display: flex;
  justify-content: center;
  z-index: 10;
}

.restart-btn {
  background: rgba(0, 255, 204, 0.08);
  border: 1.5px solid var(--neon-cyan);
  color: var(--neon-cyan);
  font-family: 'Press Start 2P', monospace;
  font-size: 0.64rem;
  padding: 14px 28px;
  border-radius: 6px;
  cursor: pointer;
  letter-spacing: 1px;
  transition: all 0.3s ease;
  box-shadow: 0 0 10px rgba(0, 255, 204, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
}

.restart-btn:hover {
  background: var(--neon-cyan);
  color: var(--color-blue-universe) !important;
  box-shadow: 0 0 25px rgba(0, 255, 204, 0.6);
  transform: scale(1.05);
}

.restart-btn svg {
  transition: transform 0.4s ease;
}

.restart-btn:hover svg {
  transform: rotate(-360deg);
}