:root {
  --bg-logo-cyan: #e0f7fa; 
  --bg-gradient-end: #ffffff;
  --primary-blue: #004aad; 
  --primary-dark: #0f172a; 
  
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(0, 74, 173, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 74, 173, 0.1);
}

html {
  width: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: 'Lato', sans-serif; 
  background: linear-gradient(to bottom, var(--bg-logo-cyan), var(--bg-gradient-end));
  color: var(--primary-dark);
  min-height: 100vh;
  margin: 0;
  padding: 0;
  position: relative;
  overflow-x: hidden;
}

.wireframe-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background-image: 
    linear-gradient(var(--glass-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--glass-border) 1px, transparent 1px);
  background-size: 50px 50px;
  opacity: 0.5;
  pointer-events: none;
}

h1, h2, h3, .brand-font {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--primary-blue);
  letter-spacing: -0.5px;
}

/* --- GLASSMORPHISM --- */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

nav.glass-panel {
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 2px solid var(--primary-blue);
}

.glass-card {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.05);
  transition: all 0.3s ease;
}

/* Hover padrão para coisas que NÃO SÃO urnas */
.glass-card:not(.flip-card-face):hover {
  transform: translateY(-5px);
  background: #fff;
  box-shadow: 0 10px 20px rgba(0, 74, 173, 0.15);
  border-color: var(--primary-blue);
}

/* --- BOTÕES --- */
.btn-primary {
  background: var(--primary-blue);
  color: #ffffff;
  font-weight: bold;
  border: none;
  transition: all 0.3s ease;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0, 74, 173, 0.3);
}
.btn-primary:hover {
  background: #003380;
  transform: scale(1.02);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary-blue);
  color: var(--primary-blue);
  font-weight: bold;
  transition: all 0.3s;
  cursor: pointer;
}
.btn-outline:hover {
  background: var(--primary-blue);
  color: white;
}

/* --- NAVEGAÇÃO --- */
.nav-link {
  position: relative;
  color: #64748b;
  transition: color 0.3s;
  cursor: pointer;
  font-weight: 700;
}
.nav-link:hover, .nav-link.active { color: var(--primary-blue); }
.nav-link::after {
  content: "";
  position: absolute;
  width: 0;
  height: 3px;
  bottom: -4px;
  left: 0;
  background-color: var(--primary-blue);
  transition: width 0.3s;
}
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

/* --- ANIMAÇÕES --- */
.fade-in {
  animation: fadeIn 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- ESTILOS DE FLIP CARD (CORRIGIDO) --- */
.flip-scene {
  perspective: 1000px;
}

.flip-card {
  width: 100%;
  height: 100%;
  position: relative;
  transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  transform-style: preserve-3d;
}

.flip-card-face {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border-radius: 12px;
  top: 0;
  left: 0;
  /* Importante: garante que o verso não capture mouse quando escondido */
  z-index: 2; 
}

.flip-card-back {
  background-color: var(--primary-dark);
  transform: rotateY(180deg);
  display: flex;
  flex-direction: column;
  z-index: 1; /* Verso fica atrás */
}

/* CLASSE DE ROTAÇÃO */
.is-flipped .flip-card {
  transform: rotateY(180deg);
}

/* --- A CURA DO BUG --- */
/* Quando virado, o verso ganha prioridade de clique */
.is-flipped .flip-card-back {
  z-index: 5;
}
/* Quando virado, a frente ignora o mouse (evita flicker) */
.is-flipped .flip-card-front {
  pointer-events: none;
}