:root {
    --primary-color: #6f42c1;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --text-main: #212529;
    --safe-area-inset-bottom: env(safe-area-inset-bottom);
}

body {
    background-color: var(--bg-color);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    /* Deshabilitar selección de texto para parecer nativa */
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

/* Contenedor principal para evitar scroll horizontal */
.app-container {
    max-width: 500px;
    margin: 0 auto;
    min-height: 100dvh; /* Dynamic Viewport Height */
    display: flex;
    flex-direction: column;
    padding-bottom: calc(80px + var(--safe-area-inset-bottom));
}

/* Tarjetas con estilo Apple/Google */
.app-card {
    background: var(--card-bg);
    border-radius: 24px;
    border: none;
    box-shadow: 0 8px 24px rgba(0,0,0,0.04);
    transition: transform 0.2s ease;
}

.app-card:active {
    transform: scale(0.98); /* Efecto de presión */
}

/* Navegación Inferior (Tab Bar Nativa) */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: calc(70px + var(--safe-area-inset-bottom));
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(15px); /* Efecto Glassmorphism */
    border-top: 1px solid rgba(0,0,0,0.05);
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding-bottom: var(--safe-area-inset-bottom);
    z-index: 1000;
}

.nav-item {
    color: #adb5bd;
    text-decoration: none;
    font-size: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.nav-item.active {
    color: var(--primary-color);
}

.nav-item i {
    font-size: 24px;
}

/* Botones con estilo Premium */
.btn-vozia {
    background: linear-gradient(135deg, #6f42c1 0%, #a259ff 100%);
    border: none;
    border-radius: 16px;
    padding: 16px;
    font-weight: 600;
    color: white;
    box-shadow: 0 4px 12px rgba(111, 66, 193, 0.3);
}